KR100911148B1 - Lightened Coping for bridge - Google Patents

Abstract

The present invention is directed to coping of bridges to reduce their own weight and maintain load capacity.

To this end, the present invention is a coping installed in the upper end of the bridge and a plurality of girders are placed, the vertical wall portion is a plurality of steel wires and hollow pipes embedded in the longitudinal direction; And a support portion protruding from the lower side of the vertical wall portion to the left and right sides of the plurality of girders, and having a shape steel embedded in the lower portion of the vertical wall portion, except for the portion on which the girders are placed. Comprised of a plurality of mutually independent girder support portion is removed, it is possible to reduce the weight while maintaining the load capacity of the coping portion is easy to move and construction.

Description

Lightened Coping for bridge

The present invention relates to the coping of bridges, and more particularly to the coping of bridges installed in the upper end of the bridge.

Currently, all the processes such as reinforcing steel bars, assembling formwork, placing concrete, curing, etc. are performed in the field to construct pillars and piers. There are technical and economic difficulties due to the prolonged construction period.

Accordingly, in the developed countries, prefabricated bridge construction methods for converting piers into PCs and producing them in factories have recently been developed and used. This is a unit structure made of precast type, that is, the segment is manufactured in a certain place, so it is easy to control the quality of the concrete, so it is advantageous to manufacture high quality members, and the segment is continuously produced, which is advantageous for manpower management and formwork, Segment production can be carried out in parallel with the foundation work, which has the advantage of shortening the air compared to the field casting method.

When the prefabricated method is used, the pier and upper structures (coping, girder, top plate, etc.) made of a plurality of unit structures (segments) after construction of the foundation concrete including the foundation burrow from the terrain floor in the field Bridges are constructed by sequentially lifting and assembling with a crane or crane.

When the bridge is constructed by the prefabricated method, the bridge and the upper structure (coping, girder, top plate, etc.) of each unit structure are lifted by a crane or a crane. Can be. Therefore, many methods for reducing the load of the unit structure and the like have been devised. However, even if the load of the unit structure or the like is reduced, the load capacity, the seismic performance, and the like of the assembled bridge should not be reduced.

In the case of piers, since the column part receives mainly compressive load and the coping part receives a bending load, the cross section of the coping part is large in most cases. In addition, since the length of the coping portion is often at least 10 m or more, the load of the entire coping portion is quite large.

Therefore, in order to become a prefabricated bridge construction method, it is necessary to find a way to greatly reduce the weight of the coping part. In the case of girders, the load on the individual girders is generally about 100 tons, whereas the load on the copings must support a load of about 500 tons, which is about 5 times larger than that of the girders. It is very big.

Therefore, since the weight of the coping portion is very large, in order to segment the coping portion, methods for reducing self weight have been sought.

The present invention has been proposed in view of the above-described conventional situation, and an object thereof is to provide a coping of a bridge to reduce its own weight and maintain a load capacity.

In order to achieve the above object, the coping of a bridge according to an embodiment of the present invention is a coping installed in the upper end of a bridge and a plurality of girders,

A plurality of steel wires are embedded in an upper portion of the vertical wall portion, and a vertical wall portion in which a hollow pipe is embedded in the middle portion of the vertical wall portion in the longitudinal direction; And a support portion protruding from the lower side of the vertical wall portion to the left and right sides of the plurality of girders, and having a shape steel embedded in the lower portion of the vertical wall portion, except for the portion on which the girders are placed. It is characterized by consisting of a plurality of mutually independent girder support portion is removed.

And, the coping of the bridge according to another embodiment of the present invention, as a coping is installed in the upper end of the bridge pier and a plurality of girders are placed,

A vertical wall portion in which a plurality of steel wires and hollow pipes are embedded in the longitudinal direction; And a plurality of supporting parts installed at lower portions of the vertical wall portions independently of each other and orthogonal to the lower portions of the vertical wall portions to settle one side of each girder, and the plurality of supporting portions are erected deflector-shaped steels. It consists of, wherein the vertical wall portion and the plurality of support portion connecting portion is characterized in that the reinforcing rod or the shape steel is installed in the longitudinal direction of the vertical wall portion.

As described in detail above, according to the present invention, only the girder support part is removed and the remaining part is removed, a hollow material is introduced into the abdomen of the coping part, and a steel wire capable of receiving a compressive force at the bottom of the coping part is provided, and a steel wire is provided at the top of the coping part. By arranging, it is possible to reduce the weight while maintaining the load capacity of the coping portion, thereby facilitating movement and construction.

In addition, by making the girder base portion made of steel or by making the side cross section of the base portion into a triangle, it is possible to reduce the weight while maintaining the load capacity of the coping portion.

On the other hand, the present invention is not limited only to the above-described embodiments and can be carried out by modifications and variations within the scope not departing from the gist of the present invention, the technical idea that such modifications and variations are also within the scope of the claims Must see

Hereinafter, the coping of a bridge according to the present invention with reference to the accompanying drawings as follows.

1 is a view schematically showing a bridge to which coping according to the present invention is applied. Coping 30 according to the present invention is installed on the upper end of the bridge piers 20 of the bridge and a plurality of girders 40 are horizontally placed. Coping 30 according to the invention is also applicable to prefabricated bridges.

(First embodiment)

2 is a perspective view showing the configuration of the coping 30 according to the first embodiment of the present invention.

The coping 30 of the present invention includes a vertical wall portion 31 in which a plurality of steel wires 33 and hollow pipes 35 are embedded in the longitudinal direction; And a supporting part 32 protruding from the lower side of the vertical wall part 31 to the left and right, and having one side of the plurality of girders 40 settled therein.

In particular, the H-beam 34 is embedded in the longitudinal direction of the vertical wall portion 31 in the support portion 32 in contact with the vertical wall portion 31 (that is, the lower portion of the vertical wall portion 31). In the portion projecting from the support part 32 to the left and right, a plurality of girder support parts 32a, 32b, and 32c protrude independently from each other. One side portion of the girder 40 is installed on each girder support portion 32a, 32b, 32c protruding independently from the left and right.

In other words, the vertical wall portion 31 and the girder support portions 32a, 32b, and 32c are mutually integrated with concrete, and the girder 40 is mounted when the girder support portions 32a, 32b and 32c are manufactured. Only made of concrete, and the rest is to remove the concrete to reduce the weight of the coping (30). That is, by making only the portion of the support portion 32 where the girder 40 is settled protrudes from the lower portion of the vertical wall portion 31, the amount of concrete required for manufacturing the member can be reduced, thereby reducing the load of the coping 30. Will be.

The reason why the H beam 34 is embedded in the lower portion of the vertical wall portion 31 in the longitudinal direction is to allow the longitudinal compression force of the coping 30 to be sufficiently received in a small cross section, and the vertical wall portion ( The reason why the hollow pipe 35 is embedded in 31 is to reduce the weight thereof. Meanwhile, the H beam may be any structure that can sufficiently receive the longitudinal compressive force of the coping 30 such as a channel having a d-shaped shape or an I-shaped steel or a large amount of rebar instead of the H beam 34. (34) may be substituted.

3A is a perspective view illustrating a first modification of FIG. 2, and FIG. 3B is a cross-sectional view taken along the line A-A of FIG. 3A. The difference from FIG. 2 is that the bottom of each girder support part 32a, 32b, 32c is tapered. That is, compared with the first embodiment of the present invention described above, the remaining portions except for the shape of the girder support portions 32a, 32b, and 32c are the same, and the girder support portions 32a, 32b, and 32c are the same. The difference is that the bottom surface is inclined inward toward the vertical wall portion 31. This is to reduce the weight of the support portion 32 by reducing the volume of the concrete required for the girder support portion (32a, 32b, 32c) that is not dynamically loaded.

In order to fabricate the coping 30 as shown in FIG. 3a, as shown in FIG. 3b, the reinforcing mesh 42 to form the vertical wall portion 31 and the reinforcing mesh 44 to form the girder support portions 32a, 32b, and 32c are formed. Each of them is manufactured, but the interconnection points of the reinforcing bar 42 and the reinforcing bar 44 are interconnected, and a steel wire insertion pipe (not shown) into which the steel wire 33 is to be inserted, and a hollow pipe 35 for reducing the weight thereof. The coping 30 as shown in FIG. 3A is produced by placing and curing concrete using a formwork (not shown) located next to 42 and / or 44. 3A and 3B, the H beam 34 is not shown, but the H beam 34 may be embedded.

FIG. 4 is a perspective view showing a second modified example of FIG. 2, which is different from FIG. 2 in that a wing wall 36 having a triangular cross section is added to both sides of each girder support part 32a, 32b, and 32c. It is different from that formed. That is, in comparison with the above-described first embodiment of the present invention, the remaining portions except for the form of the girder support portions 32a, 32b, and 32c are the same, and their respective girder support portions 32a, 32b, and 32c are the same. On both sides of the) protruding upward in a triangular plate shape, but protruded integrally with the vertical wall (31). This not only makes the settlement of the girder 40 easier, but also prevents the girder 40 from falling or falling from each girder support part 32a, 32b, 32c. Although not shown in FIG. 4, as shown in FIG. 3A, the bottom surfaces of the girder support parts 32a, 32b, and 32c of FIG. 4 may be tapered.

5A is a perspective view showing the configuration of a coping according to a second embodiment of the present invention, and FIG. 5B is a cross-sectional view taken along line B-B in FIG. 5A.

When comparing the second embodiment of the present invention with the first embodiment, the first embodiment is the vertical wall portion 31 and the girder support portions 32a, 32b, 32c are mutually integrated with concrete, but the second embodiment is The difference is that the vertical wall portion 31 is made of concrete and the girder support portion 40 is made of steel.

In other words, the second embodiment of the present invention includes a vertical wall portion 31 in which a plurality of steel wires 33 and hollow pipes 35 are embedded in the longitudinal direction; And a plurality of support parts 50 installed independently of each lower part of the vertical wall part 31 and orthogonal to the lower part of the vertical wall part 31 to settle one side of the girder. The part 50 is made of erected zigzag-shaped or yaw-shaped steel, and the reinforcing bars 38 are connected to both sides of the supporting part at the connecting portion of the vertical wall part 31 and the plurality of supporting parts 50. It is installed in the longitudinal direction of the vertical wall portion 31 so as to pass through the portion.

In addition, although both side portions of the protruding portions of the bases 50 protruding left and right from the lower portion of the vertical wall portion 31 preferably have a triangular cross section, it is possible to have a cross section of another shape.

In order to fabricate the coping 30 as shown in FIG. 5A, as shown in FIG. 5B, a rebar mesh 46 to form a vertical wall portion 31 is manufactured, and the supporting portion 50 is appropriately disposed on the rebar mesh 46. The connection portion 48 between the reinforcing bar 46 and the supporting unit 50 (the lower part of the reinforcing bar 46) is fixed by welding, and the steel wire insertion pipe (not shown) and the hollow into which the steel wire 33 is to be inserted. The pipe 35 is embedded in the reinforcing bar 46, and a plurality of holes are formed in both sides of the supporting part 50 to penetrate the reinforcing bar 38 in the longitudinal direction, and then use a formwork (not shown). When the concrete is poured and cured, the coping 30 as shown in Figure 5a is produced.

Of course, instead of drilling a plurality of holes on both sides of the support portion 50 to penetrate the reinforcing bar 38 in the longitudinal direction, the reinforcing bar 38 may be welded together with the shear connector. That is, a plurality of holes are formed at both sides of the supporting part 50 to penetrate the reinforcing bar 38 in the longitudinal direction, and the welding surface of the reinforcing bar 38 and the hole may be welded to perform the same function as the shear connector.

1 is a view schematically showing a bridge to which coping is applied according to the present invention;

2 is a perspective view showing the configuration of the coping according to the first embodiment of the present invention,

3A is a perspective view illustrating a first modification of FIG. 2;

3B is a sectional view taken along the line A-A of FIG. 3A,

4 is a perspective view showing a second modification of FIG.

5A is a perspective view showing the configuration of a coping according to a second embodiment of the present invention;

FIG. 5B is a cross-sectional view taken along the line B-B in FIG. 5A.

<Description of Symbols for Major Parts of Drawings>

10: foundation 20: pier

30 coping 31 vertical wall

32, 50: support portion 32a, 32b, 32c: girder support portion

33: steel wire 34: H beam

35: hollow pipe 36, 37: wing wall

38: rebar 40: girder

42, 44, 46: Rebar network

Claims (4)

A coping installed at the upper end of a bridge and a plurality of girders are placed, A vertical wall portion having a steel wire embedded in an upper portion thereof and a steel material embedded in a lower portion thereof in a longitudinal direction thereof; And The coping of the bridge, characterized in that formed in the lower portion of the vertical wall portion consisting of a support portion is placed one side of the plurality of girders. The method of claim 1, The section steel is coping of the bridge, characterized in that consisting of H-shaped steel, angles, channels. A coping installed at the upper end of a bridge and a plurality of girders are placed, A vertical wall portion in which a steel wire and a hollow pipe are embedded in the longitudinal direction at an upper portion thereof; And The coping of the bridge, characterized in that formed in the lower portion of the vertical wall portion consisting of a support portion is placed one side of the plurality of girders. The method of claim 3, wherein Coping of the bridge, characterized in that the hollow pipe is a plurality.

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