KR102317000B1 - Steel tube partially filled with concrete and method producing the same - Google Patents

Abstract

The present invention relates to a steel pipe partially filled with concrete and a method for manufacturing the same, and more particularly, to a steel pipe partially filled with concrete and a method for manufacturing the same, which is configured to divide the internal cross section of the steel pipe to fill concrete in a portion requiring introduction of prestress .

Description

Concrete partially filled steel pipe and manufacturing method thereof

The present invention relates to a steel pipe partially filled with concrete and a method for manufacturing the same, and more particularly, to a steel pipe partially filled with concrete and a method for manufacturing the same, which is configured to divide the internal cross section of the steel pipe and fill concrete in a portion requiring introduction of prestress .

Reinforced concrete structures are reinforced with reinforcing bars in the cross section considering the properties of concrete that are weak in tension. However, even in this case, considering that it is difficult to avoid cracks in the concrete part, the prestressed concrete structure ( Prestressed concrete structures) are widely used.

This prestressed concrete structure is to remove the external force received during use by pre-stressing the member using a steel wire. In other words, concrete often cracks due to tensile strain, and if a strong compressive strain is applied to the member in advance with a steel wire in such a place, the tensile strain is eliminated by the compressive strain caused by the steel wire, so the member itself is substantially large. It is not subjected to tensile strain.

Methods for applying prestress to concrete include a pretension method and a posttension method. The former is a method in which concrete is poured and hardened with tensile force applied to the steel wire, and then both ends of the steel wire are peeled off to apply a compressive force to the concrete. It is a method of fixing both ends to the end of the concrete member by inserting a steel wire and pulling it. This method is widely used in bridges, etc. in addition to the members for the assembly of reinforced concrete structures.

Registered Patent Publication No. 10-1212831 (Registration Date: 2012.12.10)

The present invention has been devised to provide an improved prestressed concrete structure,

An object of the present invention is to provide a concrete partially filled steel pipe capable of significantly reducing weight while retaining the advantages of a prestressed concrete structure.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned are clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below (hereinafter referred to as 'person of ordinary skill'). it could be

Concrete partially filled steel pipe according to the present invention, a tube; a partition member dividing the interior of the tube into two or more portions so that a prestress is applied to a specific portion of the tube; a plate member disposed at an end of a portion to which prestress is applied among the two or more portions and having a through hole formed therein; a sheath tube disposed in the tube to pass through the through hole; and a plurality of steel wires disposed to pass through the sheath tube, wherein the prestressed portion of the tube of the two or more portions is filled with concrete.

According to an embodiment of the present invention, the partition member may include: a hollow concentric tube disposed in the tube concentrically with the tube; and a plurality of blades connecting the outer surface of the concentric tube and the inner surface of the tube, wherein the plate member is disposed at an end of the tube.

According to an embodiment of the present invention, the plurality of blades includes four blades, and the four blades are, respectively, configured to connect the outer surface of the concentric tube and the upper, lower, left and right inner surfaces of the tube, Concrete is filled between each of the wings.

According to an embodiment of the present invention, the Sanggi plate member is configured in the same shape as the shape connecting the inner surface of the tube from the outer surface of the concentric tube.

According to another embodiment of the present invention, providing a hollow tube; inserting a partition member dividing the cross section of the tube into a plurality of pieces into the tube; disposing a plate member having a plurality of through-holes formed at an end of the tube; disposing a sheath tube in communication with the through hole in each part divided by the partition member; pouring and curing concrete in the portion divided by the partition member; and inserting a plurality of steel wires into the sheath tube and applying prestress.

Preferably, the partition member comprises: a hollow concentric tube disposed in the tube concentrically with the tube; and a plurality of blades connecting the outer surface of the concentric tube and the inner surface of the tube.

Preferably, the concrete is not filled in the hollow of the concentric tube, and only the portion divided by the plurality of blades is filled.

According to the present invention, there is provided a concrete partially filled steel pipe capable of significantly reducing weight while retaining the advantages of a prestressed concrete structure.

Effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly recognized by those skilled in the art from the following description.

1 shows a fixture used for prestressing a concrete structure;
Figure 2 shows a lower tension type concrete partially filled steel pipe according to an embodiment of the present invention,
Figure 3 shows a lower tension type concrete partially filled steel pipe according to an embodiment of the present invention,
Figure 4 shows a front view of the distal end of Figure 2;
Figure 5 shows a cross-sectional view of the central portion of Figure 2,
6 shows an upper tension type concrete partially filled steel pipe according to another embodiment of the present invention,
7 shows an upper tension type concrete partially filled steel pipe according to another embodiment of the present invention,
8 shows a front view of the end of FIG. 6 ,
Figure 9 shows a cross-sectional view of the central portion of Figure 6,
Figure 10 shows a shear-section tension-type concrete partially filled steel pipe according to another embodiment of the present invention,
11 shows a partial-filled steel pipe in shear tension type concrete according to another embodiment of the present invention;
Figure 12 shows a front view of the distal end of Figure 10;
13 shows a cross-sectional view of the central portion of FIG. 10 .

Specific structural or functional descriptions presented in the embodiments of the present invention are only exemplified for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Meanwhile, in the present invention, terms such as first and/or second may be used to describe various components, but the components are not limited to the above terms. The above terms are used only for the purpose of distinguishing one component from other components, for example, within the scope of not departing from the scope of rights according to the concept of the present invention, the first component may be named as the second component, Similarly, the second component may also be referred to as the first component.

When a component is referred to as being “connected” or “connected” to another component, it should be understood that it may be directly connected or connected to the other component, but other components may exist in between. something to do. On the other hand, when an element is referred to as being “directly connected” or “in direct contact with” another element, it should be understood that no other element is present in the middle. Other expressions for describing the relationship between elements, that is, expressions such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

Like reference numerals refer to like elements throughout. Meanwhile, the terms used in this specification are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used herein, “comprises” and/or “comprising” means that the stated component, step, operation and/or element is the presence of one or more other components, steps, operations and/or elements. or addition is not excluded.

Concrete partially filled steel pipe according to the present invention, a tube; a partition member dividing the interior of the tube into two or more portions so that a prestress is applied to a specific portion of the tube; a plate member disposed at an end of a portion to which prestress is applied among the two or more portions and having a through hole formed therein; a plurality of steel wires disposed in the tube to pass through the through hole; and a sheath tube each wrapped around the plurality of steel wires, wherein the prestressed portion of the two or more portions is filled with concrete.

The steel pipe partially filled with concrete according to the present invention divides the inside of the steel pipe into a plurality of parts, and partially fills only the part where prestress is to be introduced among the plurality of parts, thereby maximizing the efficiency of the cross-section of the steel pipe.

In addition, according to the present invention, it is possible to reduce its own weight by allowing only a portion of the interior of the steel pipe to be filled instead of all concrete. While enabling weight reduction, it is possible to obtain an effect equal to or greater than the effect using the existing pre-stress method.

In addition, in the prior art, in order to introduce a prestress to the structure, the anchorage must be mounted, but according to the present invention, there is no need to use a separate anchorage, thereby simplifying the structure.

In addition, since the use of reinforcing bars in the concrete cross section can be minimized or eliminated, workability can be improved.

The tube may be a steel tube. The tube may be configured not only in a general circular shape, but also in a polygonal shape, an oval shape, and the like.

A partition member is disposed in the tube to divide the interior of the tube into two or more portions so that a prestress is applied to a specific portion of the tube. By filling any one or more parts of the parts divided by the partition member with steel wire and concrete, it is possible to apply prestress to the required part.

The plate member is disposed at the end of the prestressed portion. Even in the case of being disposed at the end, it is possible to reduce the weight by allowing the concrete to be configured to be disposed only in the cross-sectional portion to be filled. The plate member allows a tensile force to be applied to the steel wire through an external tensioning device, without the need to install a fixture for conventional prestress introduction.

More specifically, a general anchorage 300 is shown in FIG. 1 . With reference to this, the anchorage 300 is installed in a concrete structure such as a bridge girder made of pre-stressed concrete in which compressive stress is applied to the concrete in advance, and the acupressure plate 301, the casting 303, the anchor head 305 and the wedge ( 307). The acupressure plate 301 is provided at one end and exposed to the outside, and the casting 303 is embedded in the concrete structure from the rear side of the acupressure plate 301 . The anchor head 305 is coupled to the acupressure plate 301, and a steel wire insertion hole (not shown) is formed. The wedge 307 is inserted into the steel wire insertion hole to fix the steel wire. By using such a configuration, a prestress is applied to the concrete structure by pulling the steel wire passing through the steel wire insertion hole. Typically, such a fixture 300 is required to apply prestress, but according to the present invention, by introducing a plate member, the acupressure plate 301, casting 303, and anchor head 305 generally included in the anchorage are included. Without the configuration of the plate member itself can replace the function of the acupressure plate (301).

As described above, the plate member is provided with a through hole through which a plurality of steel wires and sheath tubes for applying prestress pass through. The plate member may replace the function of the acupressure plate 301 of the conventional anchorage. That is, after concrete pouring and curing, when pulling a plurality of steel wires inserted into the sheath tube by a tensioning device, the acupressure plate 301 performs a function of receiving the force of the tensioning device. According to the present invention, this is performed by the plate member instead. Since it is configured to do so, the configuration of the anchorage can be minimized. Since the plate member can perform the function of the anchorage with a much simpler configuration than the existing anchorage, there is an advantage that the overall configuration can be simplified.

As described above, among the parts divided by the partition member, the part where the plate member is disposed is filled with concrete so that prestress can be applied.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[First embodiment: lower or upper tension type]

The lower tension type concrete partially filled steel pipe (B) or the upper tension type concrete partially filled steel pipe (T) according to an embodiment of the present invention is a tube (2), a partition member (4), a plate member (6), a plurality of steel wires (8) and a sheath tube (10). 2 to 5 show the lower tension type concrete partially filled steel pipe (B), and FIGS. 6 to 9 show the upper tension type concrete partially filled steel pipe (T).

According to the present invention, the upper tension type concrete partially filled steel pipe (T) is for a case where tension occurs in the approximately upper half section of the steel pipe, and the lower tension type concrete partially filled steel pipe (B) is approximately the lower half section of the steel pipe This is for the case where tension occurs. The lower tension type concrete partially filled steel pipe (B) can be applied to a simple beam type girder where tension occurs at the bottom, and the upper tension type concrete partially filled steel pipe (T) and lower tension type concrete partially filled steel pipe ( B) can be applied to a continuous beam in a complex way. In other words, in the central part of the span of the continuous beam, tension occurs approximately at the lower part of the cross section, and in the case of the branch, tension occurs approximately at the upper part of the cross section. It can also be employed in the case of continuous beams in which upper and lower tensions occur by applying (B) to each part in a complex manner. The tube 2 may be a steel tube, and although a circular tube is shown in the drawings, the shape is not limited thereto, and may be configured in a polygonal shape, an oval shape, or the like.

The partition member 4 divides the cross section of the tube 2 along the longitudinal direction. That is, it divides the cross section of the tube 2 over substantially the entire length of the tube 2 . For upper or lower tension, the partition member 4 can divide the cross section of the tube 2 into an upper part 21 and a lower part 23 . To this end, according to an embodiment, the partition member 4 may include a partition part 41 and a connection part 43 .

The compartment 41 connects both inner surfaces of the tube 2 . Preferably, the compartment 41 may connect both inner surfaces of the tube 2 in a curved manner, for example, to form an approximately arc and connect both inner surfaces of the tube 2 . In the present embodiment, the partitioning portion 41 functions to divide the upper portion 21 and the lower portion 23 .

In the case of the lower tension type, by dividing the cross section of the steel pipe through the partition part 41, filling the lower part 23 with concrete and applying prestress, by generating a compressive force on the girder of the simple beam type in which tension is generated in the lower part The overall weight can be reduced while maximizing the efficiency of the steel pipe section. In the case of the lower tension type, the partition part 41 connects both inner surfaces of the tube 2 in a curved surface, and preferably, connects both inner surfaces of the tube 2 in a curved upward convex surface.

In the case of the upper tension type, the efficiency of the cross-section of the steel pipe can be maximized by filling concrete and prestressing the upper part 21 of the cross-section of the steel pipe divided through the partition 41 . According to an embodiment of the present invention, in the case of the upper tension type, the compartment 41 connects the inner surfaces of both sides of the tube 2 in a curved surface, and preferably, the inner surface of the tube 2 is a curved surface concave downward. connect the sides

The connection part 43 connects the partition part 41 and the inner surface of the tube 2 . In the case of the lower tension type, the connection part 43 connects the compartment 41 and the upper inner surface of the tube 2 , and in the case of the upper tension type, the connection part 43 is the compartment 41 and the tube 2 . It is configured to connect the lower inner side. Although it is illustrated in the drawings that the two connecting portions 43 are formed, the present invention is not limited thereto, and the number may be increased or decreased. However, in the case of the lower tension type, when the two connection parts 43 are formed to be connected to the inner surface of the tube 2 in an oblique direction or the partition part 41 is formed in a convex shape upwards, it acts upward by prestress. It serves to effectively transmit the force to the upper tube 25, and in the case of the upper tension type, the connecting portion 43 formed in two oblique directions along with the downwardly concave shape of the connecting portion 43 is downwardly by prestress. It functions to effectively transmit the applied force to the lower tube (27).

The plate member (6) is disposed on any one of the cross-sectional parts of the tube (2) divided by the partition member (4). The plate member 6 may be disposed on the lower part 23 of the tube 2 for lower tension of the steel pipe filled with concrete, and the lower part 23 of the tube 2 divided by the partition 41 . ) the plate member 6 is disposed. Conversely, for the upper tension type, the plate member 6 is arranged on the upper part 21 of the tube 2 , ie on the upper part 21 of the tube 2 divided by the compartment 41 . Further, the plate member 6 is disposed at both ends of the tube 2 .

One or more through-holes 16 are formed in the plate member 6 . The through hole 16 is provided so that the sheath tube 10 can pass or the sheath tube 10 can be fixed to an adjacent portion of the through hole 16 . The through hole 16 is formed to pass a plurality of steel wires 8 through the sheath tube 10 in order to apply a prestress.

As described above, since the plate member 6 can perform the function of the acupressure plate 301 of the anchorage 300, the anchor head 305, the casting 303, and the like are not necessarily provided. However, referring to FIG. 2 or FIG. 6 , as the configuration of the anchor head 11 may be installed, the installation of the anchorage 300 is not necessarily excluded.

That is, each of the through-holes 16 is provided with a sheath tube 10 disposed along the longitudinal direction of the inner tube 2 . By forming a hollow cross section through the sheath tube 10 in the concrete poured into the upper part 21 or the lower part 23 of the tube 2 in the post-tension method, a space is formed so that the steel wire can be inserted. perform the function

2 to 9, it can be seen that the upper tension type concrete partially filled steel pipe (T) and the lower tension type concrete partially filled steel pipe (B) are symmetrical with respect to the horizontal direction. Therefore, it can be seen that even with the same configuration, it can be used correspondingly to any upper or lower tension type, so it has excellent usability, and is very easy to manufacture and construct.

The manufacturing method of the lower tension type concrete partially filled steel pipe (B) according to an embodiment of the present invention may be performed through the following steps.

a lower tube 27 constituting the perimeter of the lower portion 23 of the tube 2, the upper tube corresponding to the lower tube 27 and constituting the perimeter of the upper portion 21 of the tube 2 ( 25) is prepared. Among the upper tube 25 and the lower tube 27 , the upper tube 25 may be provided first, and the lower tube 27 may be formed first, and there is no limitation in the manufacturing order.

Further, the partition member 4 forms a partition 41 configured to cover the lower tube 27 , as described above, and forms a connecting portion 43 protruding from the partition 41 . The connecting portion 43 is configured of a length capable of contacting the inner surface of the upper tube 25 , more specifically, the upper tube 25 . The number of the connection parts 43 is not limited to two, and the number may be increased or decreased as necessary. However, when the two connecting portions 43 are formed to be connected to the upper inner surface of the tube 2 in an oblique direction, it serves to effectively transmit the force acting upward by the prestress to the upper tube 25 .

In the lower tube 27, the plate member 6 and the sheath tube 10 inserted into the through hole 16 formed in the plate member 6 are disposed, and the upper tube 25, the lower tube 27 and The partition member 4 is coupled by welding or the like.

The upper tube 25 and the lower tube 27 prepared in this way are moved to the construction site. The lower part 23 of the tube 2 transported to the construction site is filled with concrete. That is, the upper part 21 in the upper tube 25 is not filled with concrete to reduce the weight, and only the lower part 23 that requires prestressing is filled with concrete to maximize the efficiency of the cross-section of the steel pipe.

After the concrete is cured, a steel wire 8 is inserted and a pre-stress is introduced through an external device such as a tensioner, thereby producing a partially filled steel pipe B with a lower tension type concrete.

According to the present invention, by applying prestress only to the lower part of the central axis of the tube (2), a compressive force is generated in a simple beam type girder in which tension is generated in the lower part, thereby maximizing the efficiency of the cross-section of the steel pipe. .

In addition, by filling only the lower part of the tube (2) where the tensile force is generated in the lower part, it provides the effect of reducing the weight of the girder itself, and at the same time, it introduces prestress to the concrete, which is a material with excellent resistance to compression, to improve the cross-sectional efficiency. can be increased

In addition, since the use of reinforcing bars in the concrete cross section can be minimized or excluded, there is an effect of improving the workability.

As described above, since the plate member 6 can replace the anchorage required in the case of introducing prestress to the steel pipe, there is an advantage in that the apparatus can be simplified.

The manufacturing method of the upper tension type concrete partially filled steel pipe T according to another embodiment of the present invention may be performed through the following process. The manufacturing method of the upper tension type concrete partially filled steel pipe (T) is similar to the lower tension type concrete partially filled steel pipe (B) and its manufacturing method, and overlapping contents will be omitted.

First, a tube 2 divided into an upper tube 25 and a lower tube 27 is provided. A partition member (4) comprising a partition (41) and a connection portion (43) is disposed between the upper tube (25) and the lower tube (27). The connecting portion 43 is disposed to face the inner surface of the lower tube (27). The connection part 43, preferably, two connection parts 43 may be formed, and the number may be increased or decreased. However, when the two connecting portions 43 are formed to be connected to the lower inner surface of the tube 2 in an oblique direction, it serves to effectively transmit the force acting downward by the prestress to the lower tube 27 .

A plate member (6) is disposed at the end of the upper tube (25). The through hole 16 formed in the plate member 6 is disposed so that the sheath tube 10 passes therethrough. Next, the upper tube 25, the lower tube 27, and the partition member 4 are coupled through a method such as welding.

The tube 2 prepared in this way is moved to the construction site. After being transported to the construction site, the upper part 21 of the tube 2 is filled with concrete, and after the concrete is cured, the steel wire 8 is inserted into the sheath tube 10, and the upper section through an external device such as a tensioner Apply prestress.

According to the present invention, the efficiency of the cross section of the steel pipe is maximized by filling only the upper portion 23 that needs to be pre-stressed while minimizing the weight by preventing the concrete from being filled in the lower tube 27 .

[Second embodiment: shear tension type]

As shown in Figures 10 to 13, the shear-section tension type concrete partially filled steel pipe (W) according to another embodiment of the present invention is a tube (2), a partition member (40), a plate member (60), a plurality of steel wires (8) and a sheath tube (10). The shear-section tension type concrete partially filled steel pipe (W) according to the present invention is for a case in which prestress is required on the shear surface of the steel pipe.

The tube 2 may be a steel pipe, and although a circular tube is shown in the figure, the shape is not limited thereto, and as in the above embodiment, it may be configured in other shapes such as polygons, ovals, and the like.

According to this embodiment, the inside of the tube (2) is divided by the partition member (40) for the front-section tension type concrete partially filled steel pipe (W). The partition member 40 may be formed over the entire length of the steel pipe along the longitudinal direction of the steel pipe, or may be partially formed along the entire length of the steel pipe.

According to an embodiment, the partition member 40 may include a concentric tube 401 forming a concentric axis with the tube 2 and a plurality of wings 403 protruding from the outer circumferential surface of the concentric tube 401 . Although it is shown in the drawings that four wings are formed, the number may be increased or decreased as needed. The partition member 40 is inserted into the tube 2 and coupled to the tube 2 by welding or the like. Since the inside of the concentric tube 401 is not filled with concrete (CC), it is possible to reduce the overall weight, and the plurality of wings 403 connected from the concentric tube 401 to the inner surface of the tube 2 is a tube ( It can improve the bonding force between 2) and concrete (CC).

The plate member 60 is coupled to an end of the partition member 40 . According to one example, the partition member 40 divides the inner cross section of the tube 2 into four, and the plate member 60 in contact with each divided portion has a penetration for the arrangement of the sheath tube 10 and the steel wire 8 . A ball 16 is formed. According to one example, the plate member 60 may be formed in the same shape as the cross-section of the tube (2). That is, when the tube 2 or the steel pipe has a circular cross section, the plate member 60 may be configured in a circular shape. However, it is not intended to limit the cross-sectional shape of the tube 2 to a circular shape, and may be configured in a polygonal or oval shape such as a square. According to another example, the plate member 60 may be a hollow member substantially equal to the diameter of the concentric tube 401 . That is, the plate member 60 may have the same shape as the shape connecting the inner surface of the tube 2 from the outer surface of the concentric tube 401 .

The sheath tube 10 is disposed inside each divided tube 2 in communication with the through hole 16 .

Concrete (CC) is filled and cured in each divided part in the tube (2). A plurality of steel wires 8 may be inserted into the sheath tube 10 along each through hole 16 and prestressed through a tensioner.

The manufacturing method of the shear-section tension type concrete partially filled steel pipe (W) according to another embodiment of the present invention may be performed through the following steps.

A partition member 40 having a concentric tube 401 and a plurality of wings 403 formed therein is inserted into the tube 2 . A plate member 60 is disposed at the end of the tube 2 . A through hole 16 through which the sheath tube 10 can pass is formed in the plate member 60 , and the sheath tube 10 is disposed in communication with the through hole 16 .

The tube 2 manufactured in this way is moved to the construction site. Concrete (CC) is filled and cured in each divided part by the partition member 40 of the tube 2 moved to the construction site.

After the concrete is cured, a plurality of steel wires 8 are inserted through each sheath tube 10, and a prestress is introduced using an external device such as a tensioner, so that the shear-section tension type concrete partially filled steel pipe W is manufactured.

According to the present invention, by applying a double steel pipe structure of the concentric tube 401 and the tube 2 to reduce its own weight and introduce a prestress to the part filled with concrete to introduce a compressive force to the shear surface, tension occurs. When applied to a member, the cross-sectional efficiency can be maximized.

In addition, according to the present invention, since the use of reinforcing bars in the concrete cross section can be minimized or excluded, the effect of improving the workability is provided.

In addition, according to the present invention, since the plate member 60 can replace the anchorage required in the case of introducing prestress to the steel pipe, there is an advantage in that the apparatus can be simplified.

The same configuration in the above two embodiments is indicated by using the same reference numerals.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications, and changes are possible without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

B: Partially filled steel pipe with lower tension type concrete
CC: Concrete
T: Steel pipe partially filled with upper tension type concrete
W: Partially filled steel pipe with shear tension type concrete
2: tube 4: partition member
6, 60: plate member 8: steel wire
10: system tube 11: anchor head
16: through hole 21: upper part
23: lower part 25: upper tube
27: lower tube 40: partition member
41: compartment 43: connection part
300: anchorage 301: acupressure plate
303: casting 305: anchor head
307: wedge 401: concentric tube
403: wings

Claims (7)

tube;
a partition member dividing the interior of the tube into two or more portions so that a prestress is applied to a specific portion of the tube;
It is disposed at the end of the prestressed part of the two or more parts,
a plate member having a through hole formed therein;
a sheath tube disposed in the tube to pass through the through hole; and
Including; a plurality of steel wires disposed to pass through the sheath tube;
Concrete is filled in the tube of the prestressed part of the two or more parts,
The partition member is
a hollow concentric tube disposed in the tube concentrically with the tube; and
a plurality of blades connecting the outer surface of the concentric tube and the inner surface of the tube, dividing the front end surface of the tube, and extending along the entire length of the steel pipe;
Concrete partly filled steel pipe comprising a. The steel pipe according to claim 1, wherein the plate member is disposed at an end of the tube. The method according to claim 2, wherein the plurality of blades comprises four blades, each of the four blades are configured to connect the outer surface of the concentric tube and the upper, lower, left and right inner surfaces of the tube,
Concrete partially filled steel pipe that is filled with concrete between each of the wings. The concrete partially filled steel pipe according to claim 2, wherein the plate member has the same shape as a shape connecting the inner surface of the tube from the outer surface of the concentric tube. providing a hollow tube;
inserting a partition member dividing the cross section of the tube into a plurality of pieces into the tube;
disposing a plate member having a plurality of through-holes formed at an end of the tube;
disposing a sheath tube in communication with the through hole in each part divided by the partition member;
pouring and curing concrete in the portion divided by the partition member;
inserting a plurality of steel wires into the sheath tube and applying prestressing;
including,
The partition member may include: a hollow concentric tube disposed in the tube concentrically with the tube; and a plurality of wings connecting the outer surface of the concentric tube and the inner surface of the tube, partitioning the front end surface of the tube, and extending along the entire length of the steel tube. delete The method according to claim 5, wherein the concrete is not filled in the hollow of the concentric tube, and only the portion divided by the plurality of blades is filled.

Images