KR101080946B1 - Longitudinal curvature regulating device for sheath of bridge continuous part - Google Patents

Abstract

In the continuous point connection of the curved bridge, the tension member for prestress introduction into each girder is inserted into the sheath, and each sheath is used to maintain the exposed sheath at the point between the girders at a constant curvature. The interval holding member is connected in the horizontal direction therebetween, and the gap holding member is detachably coupled to the latching opening of the fixing member installed to the outside of the sheath, and the gap holding member in the relaxed state is maintained by using the rotation of the body portion. And fix it.
The bridge continuous sheath spacing device according to the present invention maintains the same curvature from the start point to the end point at the point where the sheath is exposed, thereby removing an unexpected amount of loss when the tension member is inserted, and preventing the introduction stress from dropping. In addition, the friction between the tension material and the sheath minimizes the construction error.

Description

LONGITUDINAL CURVATURE CONTROL APPARATUS FOR SHEATH OF BRIDGE SUPPORT}

The present invention relates to a longitudinal curvature adjusting device for the sheath of the bridge continuous portion. More specifically, in the construction of curved sections of bridges, sheath species for continuous bridge portions that can easily secure longitudinal curvatures of tension members inserted into the sheath by adjusting the sheaths extending laterally in the transverse direction. A direction curvature adjusting device.

Conventionally, PSC girder bridges use PSC beams as bridge girders.

The PSC girder is a concrete girder in which the prestress is introduced into the beam in the form of a bearing capacity in consideration of the distribution and magnitude of the stress in advance so that the stress generated by the external force can be canceled to a predetermined limit.

Such PSC girders are usually manufactured in the form of straight girders according to the shape of the girders (shape features having a very small width and height compared to the overall length of the girders). In particular, the construction of the PSC girders is straight It was common to use a method of fabricating and installing the rods and arranging the connecting ends of the PSC girders in the longitudinal direction of each other in the bridge continuous portion.

This is a result of lowering the manufacturing cost of PSC girder because it requires a bridge system system formwork that can adjust the curvature, because the manufacturing of curved PSC girder that can only have various curvatures, but does not produce the actual curved PSC girder It wasn't because I couldn't.

In addition, quality control of curved PSC girders takes a lot of effort, so in Korea, it is common to use steel box girders that are easy to machine without using PSC girders, especially in girder bridges with small longitudinal curvature.

Of course, efforts have also been made to produce the PSC girders themselves in a curved form, such a typical curved PSC girder is shown in Figure 1a.

Such a curved PSC girder has a problem in that there is no problem in manufacturing when there is a formwork for girder, but there is a problem in that it is difficult to introduce workability and prestress due to the arrangement of tension members installed therein.

That is, as the PSC girder is made in a curved form, the tension member is curved in a curved form, and thus, the installation of the tension device and the introduction of the tension force may decrease efficiency, which may cause difficulties in manufacturing the PSC girder between the limbs. There was a problem that the quality control of the prestressing process is very difficult.

Accordingly, as shown in FIG. 1A, a method of constructing a curved bridge and a bridge-shaped bridge construction by introducing a connection tension member 11 and a main tension member 12 in manufacturing a curved PSC girder 10 segment has been introduced. .

That is, in particular, the main tensioning material 12 is a method of crossing each other in a planar shape in the upper or lower flange of the girder.

According to this method, even if a problem arises in the introduction of the main tension member 12 in a parabolic form over the entire length of the inside of the girder, additional prestress is introduced by the main tension member 12 intersected with the upper and lower sides crossed. It is possible to do this, which is less influenced by the introduction of the prestress according to the curved shape of the PSC girder has an advantageous advantage, especially in the PSC girder bridge of the curved bridge type.

However, this method also did not suggest the connection of the tension member 11 and the curvature adjustment extending to the bridge continuous part in the bridge continuous part where the PSC girders are connected to each other.

That is, the bridge continuous portion (branch portion) is exposed to the sheath in which the tension member 11 extending from the inside of the PSC girder 10 is exposed, different from the specific method for the method of maintaining the longitudinal curvature of the sheath constant. It can be seen that it is not presented.

Meanwhile, as shown in FIG. 1B, a method using a precast girder 20 using a beam connecting member 21 and a steel beam 22 is proposed in constructing a curved shape of a bridge.

The method of using the steel girder 22 is to install the steel girder 22 in advance when manufacturing the precast girder 20 and the PSC girder 20 to the steel girder 22 together with the tension material not shown This is how you do it.

Therefore, PSC girders are designed to stably construct curved bridges by forming a lattice structure in the bridge continuity from the girder installation stage.

However, the curved bridge using the steel beam is also precast PSC girder 20 is also in the bridge continuous portion (point) the tension material inside the PSC girder can not be accommodated by the sheath, such sheath or the same function Since the method of adjusting the longitudinal curvature of the member having the constant has not been suggested otherwise, there is a need for a device capable of adjusting the longitudinal curvature of the sheath.

The technical problem to be solved by the present invention to solve the above problems is in the construction of bridges, such as curved bridge shape, in particular, the tension member connecting between the girder and the girder via the point portion maintains the same distance even in the curved space connection space It is to provide a longitudinal curvature adjusting device for the sheath of the bridge continuous portion that can provide a method for introducing the planned prestress through the longitudinal curvature.

Therefore, the present invention allows the tension material inserted into the girder in the construction of the curved portion of the bridge can be easily adjusted in the longitudinal curvature by a simple device mounted on the sheath tensioner for the sheath of the bridge continuous portion that enables economic and efficient tension material construction management It is to provide a curvature adjusting device.

The present invention to achieve the above technical problem

First, the longitudinal curvature of the tension member is ultimately adjusted by adjusting the lateral separation distance of the sheath in which the tension members spaced apart from each other in the lateral direction by using a fixing member such as a clamp member and a spacing member such as a turnbuckle.

Secondly, the fixing member uses a semicircular clamp for installing a plurality of longitudinally spaced in the sheaths, the semicircular clamp is to be mounted in the form of a circular band on the surface of the sheath, the semicircular clamp is a transverse side of the sheath The locking end and the fastening hole are formed together at the protruding connection end.

Third, the gap holding member was formed so that the hook portion simply inserted into the locking hole to be hooked and fixed was formed so that the horizontal gap of the sheath could be easily adjusted in the field.

To this end,

A sheath extending in the longitudinal direction at the connecting end of the PSC girder (G) and spaced apart in the transverse direction so as to accommodate the tension member penetrating the bridge continuous portion in which the PSC girders are connected to each other in the longitudinal direction. So that the tension member can maintain a constant longitudinal curvature in the bridge continuous portion,

A plurality of fixing members including a clamp formed to be spaced apart from each other in the longitudinal direction along the sheath, the clamps being formed so that the fastening holes and the locking holes are disposed together on the transverse side surfaces of the sheaths spaced apart in the transverse direction; The hook portion is formed at both ends to be caught by the locking hole of the fixing member, and is disposed between the sheaths arranged laterally spaced apart from each other and includes a turnbuckle installed to adjust the longitudinal curvature of the sheath by length adjustment. It provides a longitudinal curvature adjusting device for the sheath of the bridge continuous portion including a member.

Also preferably the gap holding member is

A ring portion formed at one end to be caught by a locking hole of the fixing member at both sides, and the other end of the bolt portion formed at an outer circumferential surface of a screw fastening portion; Bridge parts of the bridge continuous portion comprising a; and the two bolts are inserted and fastened by the female fastening portion is fastened to both ends of the bolt fastening portion is formed at both ends and the body portion for adjusting the separation distance of the bolt portion is inserted and fastened by rotation; Provides a longitudinal curvature adjusting device for the sheath.

Also preferably, the fixing member is formed so that two semicircular clamp members are connected by a hinge to surround the sheath surface in the form of a circular band, and a fastener for fastening including a bolt and a nut at a connection end of the semicircular clamp member. Provides a longitudinal curvature adjusting device for the sheath of the bridge continuous portion that the two semi-circular clamp member surrounds the sheath surface in the form of a circular tube so that the holes and the engaging holes are formed together so that the connecting ends contact each other so that the fastening holes and the engaging holes can communicate with each other. do.

According to the present invention, the sheath exposed to the continuous space can be maintained in the same longitudinal curvature by the longitudinal space between the girders at the continuous points of the curved bridges, thereby eliminating the prestress loss of the tension material inserted into the sheath. Thus, the efficiency of prestress introduced into the PSC girder can be secured.

In addition, the tension member can be arranged to have the same longitudinal curvature, and the work of inserting the tension member into the sheath in the continuous space also has the effect of minimizing friction with the sheath, thereby reducing the error in construction. Quality control of construction can be expected.

Figure 1a is a front view and a plan view of the tension material arrangement of the conventional PSC girder,
1B is a plan view of a conventional curved PSC girder bridge,
2 is a perspective view of a bridge continuous portion of a PSC girder provided with a longitudinal curvature adjusting device for the sheath of the bridge continuous portion of the present invention;
Figure 3a and Figure 3b is a perspective view of the mounting fixture of the longitudinal curvature adjusting device for the sheath of the present invention,
Figure 4 is an installation perspective view of the gap holding member constituting the longitudinal curvature adjusting device for the sheath of the present invention,
5 is an installation perspective view of the sheath longitudinal curvature adjusting device of the present invention installed on a plurality of sheaths (three or more).

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification. In addition, when a part of the specification is said to include a certain component, which means that it may further include other components, without excluding other components unless specifically stated otherwise.

First, the longitudinal curvature adjusting device 100 for the sheath of the bridge continuous portion according to the present invention extends from the girder G in the continuous bridge continuous portion (point portion J) in the curved bridge as shown in FIG. It is installed to adjust the longitudinal curvature R of the sheath 110 exposed.

First, the bridge continuity means a multi-span bridge, that is, a point in which at least two PSC girders are installed to be connected to each other in the longitudinal direction. Such a point may be a site in which the bridge is installed.

In the bridge continuous portion, the two PSC girders G are adjacent to each other, but the sheath 110 extending to accommodate the tension member 112 embedded in each PSC girder is extended.

In general, a PSC girder in a post tension manner is arranged to first arrange the sheath 110, insert the tension member 112 into the sheath 110, and then fix the tension member 112 to the PSC girder end. do.

Accordingly, the longitudinal arrangement of the sheath 110 capable of accommodating the tension member 112 is required, but the bridge continuous portion secures the longitudinal curvature of the sheath 110 precisely when the bridge needs to be installed in a curved shape. The prestress loss caused by tension and settlement of the tension member should be minimized.

2a shows that the two sheaths 110 extend from each end of each adjacent PSC girder through the bridge continuous portion to extend to each PSC girder, so that the two sheaths 110 are spaced apart in the lateral direction.

The present invention adopts a configuration for maintaining the horizontal separation distance (d) of the sheath 110 in a constant manner, which is the fixing member 130 and the spacing member (120).

First, the sheath 110 may be installed in the transverse direction in accordance with the number of installation of the tension material installed in the PSC girder, the horizontal installation interval, the tension member 112 is installed inside the PSC girder to introduce the prestress. It can be formed in the form of a hollow corrugated pipe.

The sheath 110 can be seen that a plurality of nodes 111 are formed so that the fixing member 130 of the present invention is mounted between the nodes and the nodes.

First, the fixing member 130 is largely embodied into two semi-circular clamp members 131, which will be described with reference to FIGS. 3A and 3B.

First, the semi-circular clamp member 131 is a band-shaped member that is installed so as to surround between the nodes 111 of the sheath 110, as shown in Figure 3a, one side connection end (A) of the semi-circular clamp member 131 is It can be seen that the hinge 133 is installed to be rotatable with each other.

Accordingly, as shown in FIG. 3B, the other connection end portion B formed in the semicircular clamp member 131 is bent to surround the node portions 111 of the sheath 110, and the fastening hole 132a and the locking hole 132b are formed together. do.

The other connection end (B) is to be protruded in the transverse side of the sheath 110 so that the spacing maintaining member 120 to be described later can be installed.

First, the fastening hole 132a is to allow the two semi-circular clamp members 131 to be connected to each other by a fastener including a bolt and a nut not shown.

The locking hole 132b is to be inserted into the hook portion 121a constituting the gap maintaining member 120 is caught.

At this time, each of the two semi-circular clamp member 131 is preferably such that at least three are spaced apart from each other in the longitudinal direction on the sheath 110, as shown in FIG.

This is because the two semi-circular clamp members 131 are installed to adjust the gap between the transverse directions of the sheath, so it is advantageous to precisely adjust the gap based on the three fixing parts in the sheath. .

Thus, the member for adjusting the gap is the gap maintaining member 120 of the present invention.

The gap maintaining member 120 basically uses a turnbuckle member whose length can be adjusted to adjust the horizontal gap of the sheath 110.

The gap maintaining member 120 is largely composed of both bolt portions 122a and 122b in which the ring portions 121a and 121b are formed, respectively, and a body portion 123 for adjusting the separation distance between the two bolt portions through rotation.

First, both bolt portions (122a, 122b) is one end of the hook-shaped ring portion (121a, 121b) is formed and the other end is composed of a bolt body portion formed with a threaded portion of the screw thread.

Accordingly, the ring portions 121a and 121b are members that are inserted into and caught by the catching holes 132a of the fixing member 130 as shown in FIG. 4, but the bridge continuous portion has a narrow working space so that the worker can easily maintain the gap of the present invention. In order to be installed on the fixing member 130 to 120 is to play a very important role.

That is, it can be seen that the interval maintaining member 120 is simply installed using the ring portions 121a and 121b to be detachable to the fixing member 130.

In addition, by using the hooks 121a and 121b, in addition to the locking holes 132a through which the hooks are hooked, as shown in FIG. 2, the spacers 120 may be diagonally installed using the fastening holes of the adjacent fixing members 130. Becomes very useful.

Therefore, the fastening hole and the locking hole function as holes having different interactions, but it can be seen that they can have the same function for installing the space keeping member. It is very useful.

The ring portions 121a and 121b may be formed by bending bolt portions in which the bolted portion, which is a screw thread, is not formed while manufacturing the bolt portions 122a and 122b.

Accordingly, the bolt part which is continuous with the ring part is fastened to the female fastener 124 which is formed as a fastening hole in the body part 123 to be described later, which is formed on the surface of the screw fastening part.

The body portion 123 is formed in an elliptical ring shape, for example, the female fastening holes are formed at both ends, and accommodates the bolt portions 122a and 122b therein.

That is, the male fastening portions of the bolts 122a and 122b are inserted into and fastened to the holes for the female fastening holes 124 respectively formed at both ends of the trunk portion 123, but the ring portion integrated with the bolt portion is fixed to the fixing member 120. When the body portion 123 is rotated by using a jig or the like not shown in the locked state, the end portions C of the water fastening portions of the bolt portions 122a and 122b are adjacent to or far from each other. Therefore, the lateral spacing of the sheath can be adjusted.

According to the present invention, the horizontal spacing of the sheath is adjusted by the rotation of the spacing member 120. That is, the spacing members 120 are installed along the sheath 110 in a plurality of longitudinally spaced apart, so that the spacing of the spacing members 120 are different from each other to maintain the desired longitudinal curvature. The direction curvature can be precisely adjusted.

In addition, it can be seen that the adjusted spacing can be maintained by both bolts fixed by the fastening force of the spacing members 120 to easily secure the desired longitudinal curvature.

Accordingly, it can be seen that the longitudinal separation distance and the number of installation of the spacing member 120 can be determined by the longitudinal curvature of the PSC girder, and the spacing member 120 according to the number of installation of the fixing member 130. It can be seen that the number of installation can be determined freely.

In addition, since the gap holding member 120 is installed in a lateral direction to cross each other, even if one of the gap holding member 120 is damaged, it is possible to maintain the horizontal gap of the sheath by the other gap holding member 120. Able to know.

FIG. 2 illustrates a case in which two sheaths 110 are laterally spaced apart from each other in the PSC girder, but three or more sheaths may be installed according to the PSC girder.

In FIG. 5, four sheaths 110a, 110b, 110c, and 110d are installed, and the installation state of the fixing member 130 and the space keeping member 120 of the present invention is illustrated.

Specifically, an embodiment of the bridge continuous portion sheath spacing device 100 for maintaining the same curvature in the four sheaths 110a, 110b, 110c, and 110d at the curved point portion J is as follows.

First, as described above, the fixing members 130a are mounted on the outside of the sheaths 110a, 110b, 110c, and 110d, and the fixing members are mounted on the sheaths by using fasteners including the fastening holes 132b and the bolts and nuts. 130a) will be installed.

In this case, the fixing members 130a may be located on the coaxial line, but as shown in FIG. 5, the fixing members 130a may be installed to be adjacent to each other in the intermediate sheaths 110b and 110c.

Accordingly, when the fixing members 130a are installed, the gap maintaining members 120 of the present invention are installed on the respective fixing members 130a.

It can be seen that such installation can be easily installed in the end using the ring portion of the gap maintaining member 120 to the fixing member (130a), the fixing member is also because the plurality of longitudinally spaced along the sheath is also installed A plurality of fixing members 130a are also installed in the longitudinal direction along the fixing member.

Next, it is possible to secure a predetermined longitudinal curvature by rotating the body constituting the installed spacing member 120, but the amount of rotation of each spacing member 120 is different so that the longitudinal curvature of the sheath To be able to make adjustments.

As a result, the sheath 110 exposed at the point J of the curved bridge can be maintained at a constant curvature so that the tension member 112 can be easily inserted into the sheath 110 so that the prestress determined to be secured by design has a PSC girder. It is possible to efficiently introduce into the structure, and it is possible to effectively prevent the unexpected amount of prestress loss due to the curvature formation in the bridge continuous portion.

Longitudinal curvature adjusting device for the sheath of the bridge continuous portion by the fixing member and the gap maintaining member of the present invention as described above is not heavy, easy installation and does not require a skilled skill for the operator tension material not easy to conventional quality control It is very effective in securing and maintaining curvature.

As described above, the description of the present invention relates to the embodiments, and those skilled in the art may understand that the present invention can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. Could be. Therefore, it should be understood that the embodiments described above are not limiting.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: bridge continuous sheath spacing device
110: sheath 111: node
112: tension
120: spacing member 121: ring portion
122a, 122b: Bolt portion 123: Body portion
130: fixing member 131: semi-circular clamp member
132a, 132b: engaging hole, fastening hole 133: hinge
J: Branch G: Girder

Claims (3)

In the sheath 110 extending in the longitudinal direction at the connecting end of the PSC girder G and spaced apart in the lateral direction to accommodate the tension member 112 penetrating in the longitudinal direction of the bridge continuous portion to which the PSC girder is connected to each other, The tension member 112 inserted into the sheaths 110 may maintain a constant longitudinal curvature in the bridge continuous portion.
Since the plurality of longitudinally spaced apart along the sheath 110 is installed, the engaging hole 132a and the fastening hole 132b are disposed together in the lateral side of the sheath 110 disposed laterally spaced apart. A fixing member 130 including a clamp;
Ring portions 121a and 121b are formed at both ends to be caught by the locking holes 132a of the fixing member, and are arranged between the sheaths 110 arranged to be spaced apart from each other in the lateral direction, and the sheath 110 by length adjustment. Longitudinal curvature adjustment device for the sheath of the bridge continuous portion comprising a; spacing member 120 including a turnbuckle installed to adjust the longitudinal curvature of the bridge. The method of claim 1, wherein the gap maintaining member 120
Ring portions 121a and 12b formed at one end thereof to be hooked to the locking hole 132a of the fixing member 130 at both sides thereof, and both ends of the bolt portions 122a and 122b formed at the outer circumferential surface of the male fastening portion;
As the two bolts are inserted and fastened, the female fastening parts 124 to which the male fastening parts are fastened are formed at both ends, and the separation distances of the bolt parts 122a and 122b which are inserted and fastened by rotation are adjusted. Body portion 123; longitudinal curvature adjustment device for the sheath of the bridge continuous portion comprising a. The method of claim 2, wherein the fixing member 130 is formed by two semi-circular clamp member 131 is connected by a hinge 133 to surround the sheath surface in the form of a circular band,
The connecting end of the semi-circular clamp member 131 is formed so that the engaging hole 132a and the fastening hole 132b including the bolt and nut are formed together, so that the two semicircular clamp members 131 form a sheath surface in the form of a circular tube. The longitudinal curvature adjusting device for the sheath of the bridge continuous portion, characterized in that the connecting end is wrapped in contact with each other so that the engaging hole (132a) and the fastening hole (132b) communicate with each other.

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