JP2016151112A - Manhole water stop structure and manhole and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole water stop structure with high workability and durability and a manufacturing method thereof.SOLUTION: A lower end face 3 of an upper cylindrical body 2 is laid on an upper end face 4 of a lower cylindrical body 2. Upper and lower insertion receiving grooves 11, 11 are formed on the lower end face 3 and the upper end face 4, respectively. A cylindrical water stop member 21 is inserted in the upper and lower insertion receiving grooves 11, 11. The water stop member 21 comprises a cylindrical core material 22 made of rigid material and inner and outer water stop rings 24, 24 which are formed on inner and outer surfaces of the core material 22 and abut against the insertion receiving groove 11. Thus, the inner and outer water stop rings 24, 24 can be smoothly inserted in the insertion receiving groove 11 by the core material 22 and water stop performance can be ensured by the inner and outer water stop rings 24, 24. The core material 22 can also exert shear resistance in the upper and lower cylindrical bodies 2, 2. As the water stop member 21 is stored in the insertion receiving groove 11 instead of being formed outside, durability of the water stop member 21 is improved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water stop structure for manholes that overlap cylinders, a manhole, and a construction method thereof.

  In order to prevent the manhole from being destroyed during an earthquake or the like, it is preferable to have a flexible structure in which the joint between the cylinders has play, rather than rigidly connecting the manhole vertically. For this reason, a horizontal joint is formed in the manhole.

  As a joint part to be provided between the concrete members as described above, the first water stop material partially embedded in the first concrete secondary product was provided, and part of the second concrete secondary product was embedded. There exists a thing which provided the 2nd water stop material, formed the recessed part in the 1st secondary product, and formed the projection part inserted in this recessed part in the 2nd secondary product (for example, patent documents 1).

  The protrusion is easy to insert into the recess by forming a small-diameter portion at the tip, but when used in a large-diameter manhole, the protrusion is made of a rubber material. It is expected that the work of inserting into the will become complicated.

  By the way, in a divided manhole or the like, a shearing stress is generated at a joint portion due to an earthquake or the like. Therefore, an uneven fitting portion such as an inlay joint is provided to counter the shearing force. When the uneven portion is provided on the end face in this way, it is necessary to perform the work with care so that the uneven portion does not come into contact with the outside during manufacturing, storage or transportation, as compared with a flat case.

  On the other hand, in a structure in which a metal collar is externally fitted and connected to an insertion port of an adjacent cylinder, a seal member is bonded to the inner surface of the collar, and the seal member is brought into contact with the insertion port and stopped. Although there are some which ensure water-based properties, if the adhesion is insufficient, the sealing member is easily peeled off from the inner surface of the collar, and the collar is exposed to the outside, which is disadvantageous in terms of durability.

JP 2007-56462 A

  The problem to be solved is to provide a water stop structure for manholes excellent in workability and durability, a manhole and a construction method thereof.

  According to the first aspect of the present invention, the lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, an insertion receiving groove is provided on one of the lower end surface and the upper end surface, and the lower end surface and the upper end surface In the water stop structure of a manhole in which a cylindrical water stop member attached to the other is inserted into the insertion receiving groove, the water stop member includes a cylindrical core member made of a hard material, and inner and outer surfaces of the core member. And a water-stop ring inside and outside that comes into contact with the insertion receiving groove.

  According to the configuration of the first aspect, the inner and outer water-stop rings can be smoothly inserted into the insertion receiving groove by the core material, and a certain water-stop is obtained by the inner and outer water-stop rings. Further, the core material can play a role of shear resistance in the upper and lower cylinders. Further, since the water stop member is housed in the insertion receiving groove unlike the one provided outside, the durability of the water stop member is improved.

  In the invention of claim 2, the lower end surface of the upper cylindrical body and the upper end surface of the lower cylindrical body are overlapped, and upper and lower insertion receiving grooves are provided on the lower end surface and the upper end surface, respectively. In the water stop structure of a manhole in which a cylindrical water stop member is inserted into the groove, the water stop member is provided on a cylindrical core member made of a hard material and on the inner and outer surfaces of the core member and contacts the insertion receiving groove. It is characterized by comprising an inner and outer water-stop ring in contact.

  According to the configuration of the second aspect, the inner and outer water stop rings can be smoothly inserted into the insertion receiving groove by the core material, and a certain water stop can be obtained by the inner and outer water stop rings. Further, the core material can play a role of shear resistance in the upper and lower cylinders. Further, since the water stop member is housed in the insertion receiving groove unlike the one provided outside, the durability of the water stop member is improved.

  The invention according to claim 3 is characterized in that the ends of the inner and outer water-stop rings are connected to cover the ends of the core member.

  According to the structure of Claim 3, since the edge part of the water-stop ring inside and outside was connected and made into the bag shape, adhesion of the water-stop ring to the core material is facilitated, and the water-stop ring is peeled off from the end side. This can be prevented and does not peel off when inserted into the insertion receiving groove.

  According to a fourth aspect of the present invention, a water-stopping agent injection hole is provided to communicate the insertion receiving groove with the inner periphery of the cylindrical body.

  According to the structure of Claim 4, a water stop can be improved by inject | pouring a water stop agent into the insertion receiving groove which inserted the water stop member from a water stop agent injection hole.

  The invention according to claim 5 is characterized in that a plurality of the cylinders are overlapped in the vertical direction, and the water stop structure is provided in the upper and lower cylinders.

  According to the configuration of the fifth aspect, a manhole is constructed by superimposing a plurality of cylinders on top and bottom, and the joint portion of the manhole is excellent in water stoppage due to the water stop structure.

  The invention according to claim 6 is characterized in that the cylindrical body includes a plurality of divided cylindrical bodies divided in the circumferential direction, and the plurality of divided cylindrical bodies are connected in the circumferential direction.

  According to the structure of Claim 6, the large-diameter manhole excellent in water-stopping property is obtained.

  In the invention of claim 7, the lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, an insertion receiving groove is provided on one of the lower end surface and the upper end surface, and the lower end surface and the A cylindrical water-stopping member attached to the other of the upper end surfaces is inserted into the insertion receiving groove, and the water-stopping member is provided on the cylindrical core material made of a hard material and the inner and outer surfaces of the core material. It is a construction method of a water stop structure of a manhole provided with inner and outer water stop rings abutting against the insertion receiving groove, the lower cylinder is installed, the insertion receiving groove is aligned with the tip of the water stopping member, The upper cylinder is overlaid on the lower cylinder.

  According to the structure of Claim 7, the water stop structure provided with reliable water stop can be obtained.

  In the invention of claim 8, the lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, and upper and lower insertion receiving grooves are provided on the lower end surface and the upper end surface. A cylindrical water-stopping member is inserted into the cylindrical water-proof member, and the water-stopping member includes a cylindrical core member made of a hard material, and inner and outer water-stop rings provided on the inner and outer surfaces of the core member and in contact with the insertion receiving groove. A construction method of a water stop structure of a manhole comprising: the lower cylinder is installed, and the lower part of the water stop member is inserted into the insertion receiving groove of the lower cylinder, and then the upper part of the water stop member The upper cylindrical body is aligned with the insertion receiving groove of the upper cylindrical body, and the upper cylindrical body is overlaid on the lower cylindrical body.

  According to the structure of Claim 8, the water stop structure provided with reliable water stop can be obtained.

  According to the said structure, it is excellent in on-site workability | operativity, it is excellent in durability, and even if an opening occurs in the overlapping location of a cylindrical body at the time of an earthquake etc., it can ensure water-stopping.

It is sectional drawing of the water stop structure which shows Example 1 of this invention. It is sectional drawing explaining construction as same as the above. It is sectional drawing around an insertion receiving groove same as the above. It is sectional drawing of a water stop member same as the above. It is an expanded sectional view of the principal part of a water stop member same as the above. It is a top view of a cylinder same as the above. It is a sectional view of a cylinder same as the above. It is a front view of a water stop member same as the above. It is sectional drawing around the insertion receiving groove which consists of a concrete surface same as the above. It is sectional drawing explaining construction as same as the above. It is sectional drawing explaining an open state as same as the above. It is sectional drawing of the water stop member which shows Example 2 of this invention. It is sectional drawing of the water stop member which shows Example 3 of this invention. It is sectional drawing of the water stop structure which shows Example 4 of this invention. It is sectional drawing explaining construction as same as the above. It is sectional drawing explaining the construction which shows Example 5 of this invention. It is a perspective view of the principal part of the manhole which shows Example 6 of this invention.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the Example demonstrated below does not limit the content of this invention described in the claim. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  1 to 11 show a first embodiment. A manhole 1 is an assembly-type manhole for assembling cylindrical cylindrical bodies 2, 2,..., And the cylindrical body 2 is made of precast concrete or the like. In addition, the diameter (inner diameter) of the said cylinder 2 is about 2000-3500 mm. The manhole 1 is buried in the ground and subjected to earth pressure. In this example, the cylindrical body 2 is integrated in the circumferential direction.

  The upper and lower cylinders 2 and 2 are overlapped, and a joint portion 5 of about 5 mm is provided between the lower end surface 3 and the upper end surface 4 of the upper and lower cylinders 2 and 2, and the joint portion 5 is filled with a filler or the like. Is done. The joint portion 5 is an overlapping portion. In this example, the lower end surface 3 and the upper end surface 4 are formed on flat surfaces that are substantially orthogonal to the central axis of the cylindrical body 2.

  The following structure is provided as a water stop structure. The lower end surface 3 and the upper end surface 4 are provided with ring-shaped insertion receiving grooves 11 and 11, respectively. The insertion receiving groove 11 is provided between 1/3 and 2/3 of the wall thickness of the cylindrical body 2. The position of the insertion receiving groove 11 is preferably about the center of the wall thickness in view of the defect of the manhole 1 or the like. Further, the insertion receiving groove 11 is formed concentrically with the cylindrical body 2.

  In this example, the insertion receiving groove 11 is formed by an embedded frame 12 made of steel or synthetic resin. The embedded frame 12 connects the lower edge of the ring-shaped inner peripheral plate portion 14 and the outer peripheral plate portion 15 to the inner and outer sides of the bottom plate portion 13, and the inner flange portion 16 is provided around the upper edge of the inner peripheral plate portion 14. In addition, an outer flange portion 17 is provided at the lower edge of the outer peripheral plate portion 15, and the insertion receiving groove 11 is constituted by the bottom plate portion 13, the inner peripheral plate portion 14 and the inner surface of the outer peripheral plate portion 15. By making the insertion receiving groove 11 made of steel or synthetic resin in this way, the inner surface becomes smoother than the concrete surface, so that the adhesion with the water-stopping member 21 is good and the water-stopping property is improved. The embedded frame 12 is fixed to the cylinder 2 by insert molding. In insert molding, after placing the embedded frame 12 in a fixed form (not shown) for forming the cylindrical body 2, the concrete is filled into the mold, and the filled concrete is solidified. By doing so, the embedded frame 12 is fixed to the cylindrical body 2. Further, the outer surfaces of the inner and outer peripheral plate portions 14 and 15 are flush with the lower end surface 3 and the upper end surface 4. In addition, by providing the inner flange portion 16 and the outer flange portion 17, it becomes difficult to form a gap between the embedded frame 12 and the concrete of the cylindrical body 2, and the adhesion is improved.

  Further, a recess corresponding to the insertion receiving groove 11 may be provided in the manufacturing mold and the insertion receiving groove 11 may be formed of concrete. In this case, as shown in FIG. 9, the inner surface of the insertion receiving groove 11 is a concrete surface, but the portion of the insertion receiving groove 11 can be manufactured at low cost.

  A water stop member 21 is inserted into the upper and lower insertion receiving grooves 11, 11. The water blocking member 21 includes a cylindrical core member 22 made of a hard material. The core member 22 is made of steel, stainless steel, synthetic resin, or the like. The core member 22 has a cylindrical shape, and is positioned substantially in the center in the width direction of the insertion receiving groove 11 in the inserted state. Further, the height of the core material 22 is approximately twice the height of the insertion receiving groove 11, and the thickness of the core material 22 is the manhole 1 having a diameter (outer diameter) of the cylindrical body 2 of about 2000 to 3500 mm. In the case of the steel core material 22, it is about 6 to 10 mm.

  The core material 22 also serves as a key for shear resistance in addition to water-stopping performance. For this reason, the thickness of the core material 22 is set to be equal to or greater than the thickness satisfying the shear resistance of the manhole 1. The shear resistance of the core member 22 is effective when the upper cylinder 2 moves to the left and right when the water stop member 21 is fitted in the insertion receiving groove 11 while the upper cylinder 2 is suspended during construction. As the shearing force, it is assumed that a force similar to the weight of the cylindrical body 2 is generated, and although it depends on the size of the cylindrical body 2, a thickness of about 1 mm to 3 mm is required. After the cylinders 2 and 2 are overlapped, the thickness of the core material 22 is 3 mm to 5 mm, considering the groundwater outside the cylinder 2 and the corrosion caused by the internal water existing in the cylinder 2 in 1 mm each. In consideration of safety and the shearing force due to the earthquake, the thickness is 6 to 10 mm.

  Thus, the lower end surface 3 and the upper end surface 4 are concavo-convexly fitted by the core member 22 opposing the shearing force generated by the upper and lower cylinders 2 and 2 being displaced in the plane direction at the joint portion 5. If not necessary, the lower end surface 3 and the upper end surface 4 can be formed flat.

  Further, the water stop member 21 is provided with water stop portions 23, 23 on the upper side and the lower side thereof. The water stop portion 23 is formed by fixing water stop rings 24 and 24 made of rubber or the like to the inner and outer surfaces of the core member 22 by bonding or the like. The water stop ring 24 has a cross section shown in FIG. 4 or the like that is continuous in the circumferential direction, and a plurality of inclined tongue pieces 26, 27, 27 are provided side by side with the groove 28 interposed therebetween. The inclined tongue pieces 26, 27 have inclined inclined surface portions 26A, 27A on the distal end side (end portion side), and lateral proximal end surfaces 26B, 27B on the proximal end side (center side). A groove portion 28A wider than the groove portion 28 is provided between the inclined tongue pieces 26, 27, 27 and the inclined tongue pieces 26, 27, 27. Further, the thickness T1 of the tip of the water stop portion 23 is formed to be narrower than the interval T2 between the bottom portions of the inner and outer grooves 28, 28, so that it can be easily inserted into the insertion receiving groove 11. Further, as shown in FIG. 5, the inner surfaces of the inner and outer water-stop rings 24, 24 are provided with a substantially trapezoidal uneven portion 29 on the entire surface, and the uneven portion 29 is adhered to the outer surface of the core member 22, Adhesive enters the recesses of the concavo-convex portions 29, and a stable adhesive strength is obtained. From the viewpoint of adhesiveness, the depth of the uneven portion 29 is 5 mm or less, preferably 3 mm or less.

  Further, the maximum thickness T of the water-stop portion 23 before being compressed is larger than the width W of the insertion receiving groove 11, and when the water stop portion 23 is inserted into the insertion receiving groove 11, the water-stop rings 24, 24 on the inner and outer surfaces. Is compressed in the thickness direction. Further, the interval T2 is smaller than the width W.

  The height H of the water stop member 21 is determined by the required bending angle of the manhole 1. In FIG. 11, the manhole 1 has an outer diameter of 3300 mm and a required bending angle of 1.5 degrees, and the opening amount M at the joint portion 5 is approximately 30 mm. If the design depth F of the insertion receiving groove 11 is equal to or more than half the value obtained by adding the opening amount to the height H1 of the water stopping ring 24, the water stopping member from the upper and lower insertion receiving grooves 11, 11 is used. When 21 is evenly pulled out, even if the openings are opened, the full length of the water-stopping portion 23 is located in the insertion receiving groove 11, so that the same water-stopping property as that when the openings are not opened is ensured. In actual design, it is preferable to determine the design depth F by multiplying it by a safety factor. Further, the depth F is set to be not less than three times the width W in order to ensure water stoppage.

  The core 22 has a continuous cylindrical shape. The water stop ring 24 is bonded to the core member 22 in a continuous cylindrical shape. Further, the depth F of the insertion receiving groove 11 is at least larger than the height H1 of the water stop 23. Further, the height H2 of the center portion of the water stop member 21 without the water stop portion 23 is set to an opening amount M or more of the joint portion 5, and the height H2 is set to be twice or more the opening amount M. For example, even when one of the upper and lower water-stop portions 23 does not move in the insertion receiving groove 11, the entire length of the other upper and lower water-stop portions 23 remains in the insertion receiving groove 11.

  Next, the construction method of the said water stop structure is demonstrated. After the lower cylinder 2 is installed in the embedding hole for embedding the manhole 1, the water stop member 21 is inserted into the insertion receiving groove 11 located on the upper end surface 4, and the lower end of the water stopping member 21 is the insertion receiving groove. 11 is arranged so as to abut on the bottom plate portion 13. In addition, after attaching the water stop member 21 to the insertion receiving groove 11 on the ground, the lower cylindrical body 2 may be installed in the buried hole.

  As described above, after the installation of the lower cylinder 2 and the installation of the water stop member 21 are finished, the upper cylinder 2 is suspended, and the insertion receiving groove 11 of the lower end surface 3 is positioned at the upper end of the water stop member 21. In addition, the upper cylinder 2 is overlapped with the lower cylinder 2, and at the same time, the upper portion of the water stop member 21 is inserted into the insertion receiving groove 11 on the lower end surface 3. In this case, since the core member 22 is provided in the water stop member 21, the water stop member 21 does not bend when inserted into the insertion receiving groove 11, so that alignment and insertion can be performed smoothly. it can. Further, by positioning the insertion receiving groove 11 on the lower end surface 3 and the water stop member 21, the upper end surface 4 of the lower cylinder 2 can be aligned with the lower end surface 3 of the upper cylinder 2. And the space | interval of the joint part 5 is about 5 mm, and the joint part 5 is filled with a filler (not shown).

  In this way, a plurality of cylindrical bodies 2, 2... Are overlapped to construct the manhole 1 and backfilled in the ground. When the seismic force acts on the manhole 1 and the manhole 1 is inclined, the joint 5 is opened to absorb the force at the time of the earthquake, and the cylinder 2 is not cracked.

  Further, even if a force for shifting the upper and lower cylinders 2 and 2 in the plane is applied, the occurrence of the shift can be prevented by the core member 22 resisting the shearing force.

  Thus, in this embodiment, corresponding to claim 2, the lower end surface 3 of the upper cylindrical body 2 and the upper end surface 4 of the lower cylindrical body 2 are overlapped, and the lower end surface 3 and the upper end surface 4 are In the water stop structure of the manhole 1 in which the insertion receiving grooves 11 and 11 are provided and the cylindrical water stopping members 21 are inserted into the upper and lower insertion receiving grooves 11 and 11, the water stopping member 21 is a cylindrical member made of a hard material. Since the core member 22 and the inner and outer water-stop rings 24 and 24 provided on the inner and outer surfaces of the core member 22 are in contact with the insertion receiving groove 11, the inner and outer water-stop rings 24 and 24 are inserted and received by the core member 22. It can be smoothly inserted into the groove 11, and a certain water-stopping property can be obtained by the inner and outer water-stop rings 24, 24. Further, the core material 22 can serve as a shear resistance in the upper and lower cylinders 2 and 2. Further, since the water stop member 21 is housed in the insertion receiving groove 11 unlike the one provided outside, the durability of the water stop member 21 is improved.

  Thus, in this embodiment, in correspondence with claim 5, a plurality of cylinders 2, 2... Are stacked in the vertical direction, and a water stop structure is provided on the upper and lower cylinders 2, 2. Therefore, the joint part of the manhole 1 is excellent in water-stopping due to the water-stopping structure.

  In this way, in this embodiment, corresponding to claim 8, the lower end surface 3 of the upper cylinder 2 and the upper end surface 4 of the lower cylinder 2 are overlapped to form the lower end surface 3 and the upper end surface 4. The upper and lower insertion receiving grooves 11, 11 are provided, and the cylindrical water-stopping member 21 is inserted into the upper and lower insertion-receiving grooves 11, 11, and the water-stopping member 21 includes a cylindrical core member 22 made of a hard material, It is a construction method of a water stop structure of a manhole 1 provided with inner and outer water stop rings 24, 24 provided on the inner and outer surfaces of the core member 22 and in contact with the insertion receiving groove 11. The lower cylinder 2 is installed, After inserting the lower part of the water stopping member 21 into the insertion receiving groove 11 of the lower cylinder 2, the insertion receiving groove 11 of the upper cylinder 2 is aligned with the upper part of the water stopping member 21, and Since the cylinders 2 are stacked, a water stop structure with a certain water stop can be obtained.

  Further, as an effect of the embodiment, since the insertion receiving groove 11 is formed by the embedded frame 12 made of steel or synthetic resin, the adhesiveness with the water stop member 21 is good and the water stop is improved. Further, since the inclined tongue pieces 26 and 27 have inclined inclined surface portions 26A and 27A on the distal end side and lateral proximal end surfaces 26B and 27B on the proximal end side, a water stop portion 23 is provided in the insertion receiving groove 11. When the water stop portion 23 is inserted into the insertion receiving groove 11, the water stop rings 24, 24 on the inner and outer surfaces are compressed in the thickness direction, so that the water stop is excellent.

  FIG. 12 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and the description thereof will be omitted. In this example, the inner and outer water stop rings 24, 24 are integrated. Examples of things are shown. The end portions of the inner and outer water stop rings 24, 24 are connected by a connecting end portion 31, and a groove portion 32 for inserting the core material 22 is formed between the inner and outer water stop rings 24, 24. The connecting end 31 is made of the same material as the water stop ring 24. In this example, the height H of the water stop member 21 is the distance between the end faces of the connecting end portions 31 and 31 at both ends.

  In mounting, the end portion of the core member 22 is inserted into the groove portion 32, and the core member 22, the end portion, and the groove portion 32 are bonded. As a result, the end edge 22F of the core member 22 is covered with the connecting end portion 31. When the separate water-stop rings 24, 24 are bonded to the core 22 inside and outside, it can be easily attached to the outer surface of the core 22 using the elasticity of the water-stop ring 24. Since the outer surface of the core material 22 can be fitted into the inner surface of the water stop ring 24, adhesion and the like can be facilitated. On the other hand, since the inner water stop ring 24 does not follow the inner surface of the core material 22 as it is, the bonding work becomes complicated.

  On the other hand, in the present embodiment, the end portions of the inner and outer water-stop rings 24, 24 are connected to form a bag shape, so that the bonding work can be easily performed by inserting the core member 22 into the groove portion 32. it can. Further, since the end portions of the inner and outer water stop rings 24, 24 are connected by the connecting end portion 31, when the water stop portion 23 is inserted into the insertion receiving groove 11, the water stop rings 24, 24 are not peeled off.

  As described above, this embodiment also has the same operations and effects as the above embodiment.

  In this way, in this embodiment, in correspondence with claim 3, the ends of the inner and outer water-stop rings 24, 24 are connected to cover the end of the core member 22, so that the inner and outer water-stop rings 24, Since the end portions of 24 are connected to form a bag shape, the water stop ring 24 can be easily bonded to the core member 22 and the water stop ring 24 can be prevented from peeling off from the end side. It won't peel off when inserted inside.

  FIG. 13 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-described embodiments, and the description thereof will be omitted. In this example, the inner and outer water-stop rings 24 of the second embodiment are shown. , 24, and a wide portion 33 wider than the thickness of the core member 22 is provided on the edge 22F of the core member 22, and the wide portion 33 is formed of a flat ring. Further, a wide receiving portion 32A for inserting the wide portion 33 is provided at the inner end of the groove portion 32. In this example, inclined tongue pieces 27, 27, 27 are provided side by side on the tip side.

  Therefore, when the water stop member 21 is inserted into the insertion receiving groove 11 and the connecting end 31 is brought into contact with the bottom plate part 13, the wide end 33 pushes the connecting end 31 on a wide surface, so that the connecting end 31 is compressed widely. It is possible to increase the water stoppage between the bottom plate portion 13 and the connecting end portion 31.

  As described above, this embodiment also has the same operations and effects as the above embodiments.

  14 to 15 show a fourth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiments, and the description thereof will be omitted. In this example, the upper cylinder 2 is inserted. A water-stopping agent injection hole 41 is formed to communicate the receiving groove 11 and the inner surface of the upper cylindrical body 2. The water-stopping agent injection hole 41 has a first end 41 </ b> A opened on the inner surface of the cylinder 2 higher than the other end 41 </ b> B opened in the insertion receiving groove 11, and is formed obliquely and linearly. The other end 41B is provided corresponding to the central portion of the water stop member 21 without the water stop 23.

  Further, one of the lower end surface 3 and the upper end surface 4 of the joint portion 5 is provided with a ring-shaped joint water-stopping portion 42, 42, and the joint-use water-stopping portion 42 is formed of a flat plate-like ring-shaped rubber, It is provided inside and outside the insertion receiving groove 11, respectively. In this example, a mounting groove portion 43 is formed in the upper end surface 4, and a joint water-stopping portion 42 is fitted into the mounting groove portion 43 and is fixed by bonding or the like as necessary.

  When the upper and lower cylinders 2 and 2 are overlapped, the joint water-stopping portion 42 is compressed in the thickness direction to ensure water-stopping. In this state, a water-stopping agent (not shown) is filled from the water-stopping agent injection hole 41 into the insertion receiving grooves 11 and 11. In this case, the water-stopping agent does not leak to the inner and outer surfaces of the cylindrical body 2 by the joint water-stopping portions 42 and 42. The water-stopping agent allows the water-stopping member 21 to move relative to the insertion receiving groove 11.

  As described above, this embodiment also has the same operations and effects as the above embodiments.

  Further, in this embodiment, in accordance with the fourth aspect of the present invention, since the water-stopping agent injection hole 41 communicating the insertion receiving groove 11 and the inner periphery of the cylindrical body 2 is provided, the water-stopping member 21 is inserted. By injecting a water-stopping agent into the insertion receiving groove 11 from the water-stopping agent injection hole 41, the water-stopping property of the joint portion 5 can be improved.

  Further, as an effect of the embodiment, the one end 41A that opens to the inner surface of the cylinder 2 is higher than the other end 41B that opens to the insertion receiving groove 11 and is formed in an oblique and linear shape. It can be efficiently filled under natural flow. Further, since the height position of the one end portion 41A is formed to be the same as or higher than the upper end of the insertion receiving groove 11, it is possible to reliably fill the water stop agent. Furthermore, since the one end portion 41A of the water-stopping agent injection hole 41 opens on the inner surface of the cylindrical body 2, the water-stopping agent can be easily replenished.

  FIG. 16 shows a fifth embodiment of the present invention. The same reference numerals are assigned to the same parts as those of the above-described embodiments, and the description thereof is omitted. In this example, the lower end surface 3 of the upper cylinder 2 is A water stop member 21 is fixedly provided on one of the upper end surfaces 4 of the lower cylinder 2, and the lower side of the core 22 of the water stop member 21 is attached to the upper end surface 4 of the lower cylinder 2 in FIG. It is buried and fixed. In addition, the water stop part 23 is not provided in the lower part of the core material 22. FIG.

  Moreover, the water stop part 23 is provided in the upper part of the water stop member 21, and the type of each said Example can be used for this water stop part 23. FIG.

  As described above, this embodiment also has the same operations and effects as the above embodiments.

  Thus, in this embodiment, corresponding to claim 1, the lower end surface 3 of the upper cylindrical body 2 and the upper end surface 4 of the lower cylindrical body 2 are overlapped, and the lower end surface 3 and the upper end surface 4 are overlapped. In the water stop structure of the manhole 1 in which an insertion receiving groove 11 is provided on one side and a cylindrical water stopping member 21 attached to the other of the lower end surface 3 and the upper end surface 4 is inserted into the insertion receiving groove 11, The cylindrical core member 22 made of a hard material and the inner and outer water stop rings 24 and 24 provided on the inner and outer surfaces of the core member 22 and abutting against the insertion receiving groove 11 are provided. The water ring 24 can be smoothly inserted into the insertion receiving groove 11, and reliable water stoppage can be obtained by the inner and outer water stop rings 24, 24. Further, the core member 22 can serve as a shear resistance in the upper and lower cylinders 2. Further, since the water stop member 21 is housed in the insertion receiving groove 11 unlike the one provided outside, the durability of the water stop member 21 is improved.

  In this way, in this embodiment, corresponding to claim 7, the lower end surface 3 of the upper cylindrical body 2 and the upper end surface 4 of the lower cylindrical body 2 are overlapped, and the lower end surface 3 and the upper end surface 4 are An insertion receiving groove 11 is provided on one side. In this example, an insertion receiving groove 11 is provided on the lower end surface 3, and a cylindrical water-stop member 21 attached to the other of the lower end surface 3 and the upper end surface 4 is inserted into the insertion receiving groove 11. The water stop member 21 includes a cylindrical core member 22 made of a hard material, and inner and outer water stop rings 24 and 24 provided on the inner and outer surfaces of the core member 22 and in contact with the insertion receiving groove 11. Since the lower cylinder 2 is installed, the insertion receiving groove 11 is aligned with the tip of the water stop member 21, and the upper cylinder 2 is stacked on the lower cylinder 2, It is possible to obtain a water-stopping structure having a sufficient water-stopping property.

  Further, as an effect of the embodiment, since the insertion receiving groove 11 is provided in the lower end surface 3 of the upper cylinder 2 and the lower part of the water stop member 21 is fixed to the upper end surface 4 of the lower cylinder 2, the upper cylinder The work of hanging the body 2 can be easily performed.

  FIG. 17 shows Embodiment 6 of the present invention. The same reference numerals are assigned to the same parts as those in the above-described embodiments, and the description thereof is omitted. In this example, the cylindrical body 2 is divided into two in the circumferential direction. The divided cylinders 51 and 51 are used, and the circumferential end surfaces 52 and 52 of the divided cylinders 51 and 51 are connected to constitute the cylinder 2.

  Examples of the connection structure between the circumferential end faces 52 and 52 include an adhesive, a mechanical connection, and a combination of an adhesive and a mechanical connection. For the mechanical connection structure 53, a bolt connection, a cotter fitting, or the like is used. When the circumferential end faces 52, 52 are rigidly connected, they may be rigidly connected by means having a connection strength stronger than or equivalent to the concrete strength of the cylindrical body 2.

  Further, the positions of the circumferential end faces 52, 52 are shifted in the plane position in the upper and lower cylinders 2, 2, and in this example, they are arranged at positions shifted by 180 degrees. Therefore, the circumferential end surfaces 52 and 52 of the upper and lower cylinders 2 and 2 do not continue in the vertical direction. The positions of the circumferential end faces 52, 52 are vertical joint locations, but the vertical joint locations that can be structurally weak points are not continued vertically, so that the strength of the structure can be stabilized.

  As described above, this embodiment also has the same operations and effects as the above embodiments.

  Also, in this example, corresponding to claim 6, the cylinder 2 is composed of a plurality of divided cylinders 51, 51 divided in the circumferential direction, and the plurality of divided cylinders 51, 51 are connected in the circumferential direction. A large-diameter manhole 1 excellent in water-stopping property is obtained.

  In addition, this invention is not limited to the above Example, A various deformation | transformation implementation is possible within the range of the summary of invention. For example, in the embodiment, the case where the cylindrical body is a planar circular manhole has been described as an example, but the cylindrical body may be a planar square. Moreover, in Example 5, you may embed and fix the upper side of the core material of a water stop member to the lower end surface of the upper cylinder. Furthermore, the height of the water stop member may be not more than twice the depth of the insertion receiving groove, and at least the height of the water stop portion is preferably larger than the depth of the insertion receiving groove. Moreover, in the Example, although the example which divided the cylinder into two was shown, it is good also as three or more divisions.

1 Manhole 2 Cylindrical body 3 Lower end surface 5 Joint part (overlapping part)
11 Insertion receiving groove
12 Buried frame
21 Water stop member
22 Core
23 Water stop
24 Water stop ring
26 Inclined tongue
41 Water stop agent injection hole
51 split cylinder

Claims (8)

A cylindrical shape in which the lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, an insertion receiving groove is provided on one of the lower end surface and the upper end surface, and the lower end surface is attached to the other of the upper end surface In the water stop structure of a manhole in which the water stop member is inserted into the insertion receiving groove, the water stop member is provided on a cylindrical core member made of a hard material and the inner and outer surfaces of the core member. A water stop structure for manholes, comprising an inner and outer water stop ring that abuts against the manhole. The lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, and upper and lower insertion receiving grooves are provided on the lower end surface and the upper end surface, and a cylindrical water stop member is provided in the upper and lower insertion receiving grooves. In the water stop structure of the inserted manhole, the water stop member includes a cylindrical core member made of a hard material and inner and outer water stop rings provided on the inner and outer surfaces of the core member and in contact with the insertion receiving groove. A water stop structure for manholes. 3. The water stop structure for manholes according to claim 1 or 2, wherein the ends of the inner and outer water stop rings are connected to cover the ends of the core material. The water stop structure for a manhole according to any one of claims 1 to 3, further comprising a water stop agent injection hole that communicates the insertion receiving groove and the inner periphery of the cylindrical body. 5. The manhole water stop structure according to claim 1, wherein a plurality of the cylinders are stacked in the vertical direction, and the water stop structure is provided in the upper and lower cylinders. A manhole. 6. The manhole according to claim 5, wherein the cylindrical body includes a plurality of divided cylindrical bodies divided in the circumferential direction, and the plurality of divided cylindrical bodies are connected in the circumferential direction. A cylindrical shape in which the lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, an insertion receiving groove is provided on one of the lower end surface and the upper end surface, and the lower end surface is attached to the other of the upper end surface The water stop member is inserted into the insertion receiving groove, and the water stop member is provided with a cylindrical core member made of a hard material and inner and outer stop members that are provided on the inner and outer surfaces of the core member and abut against the insertion receiving groove. A construction method of a water stop structure of a manhole equipped with a water ring,
A construction method for a water stop structure of a manhole, wherein the lower cylinder is installed, the insertion receiving groove is aligned with a tip of the water stop member, and the upper cylinder is overlaid on the lower cylinder. The lower end surface of the upper cylinder and the upper end surface of the lower cylinder are overlapped, and upper and lower insertion receiving grooves are provided on the lower end surface and the upper end surface, and a cylindrical water stop member is inserted into the upper and lower insertion receiving grooves. The water stop member is a manhole water stop structure including a cylindrical core member made of a hard material and inner and outer water stop rings provided on the inner and outer surfaces of the core member and in contact with the insertion receiving groove. A method,
After installing the lower cylinder and inserting the lower part of the water stop member into the insertion receiving groove of the lower cylinder, align the insertion receiving groove of the upper cylinder with the upper part of the water stop member, and A construction method for a water stop structure of a manhole, wherein the upper cylinder is overlaid on the cylinder.

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