KR102475152B1 - Steel composite ramen bridge - Google Patents

Abstract

Disclosed is a prefabricated steel composite ramen bridge. The prefabricated steel composite ramen bridge according to the present invention comprises: a girder which is formed in an I-type or an H-type and wherein corrugated inner wall coupling units are provided at both end parts; a precast floor plate coupled to the upper surface except for the both end parts of the girder; and a corrugated inner wall unit coupled to a blockout unit provided at a ramen bridge lower part structure, into which the corrugated inner wall coupling unit of the girder is inserted, and integrated with the corrugated inner wall coupling unit and the ramen bridge lower part structure by grouting, Provided is the prefabricated steel composite ramen bridge with improved workability and work safety.

Description

Prefabricated steel composite ramen bridge {STEEL COMPOSITE RAMEN BRIDGE}

The present invention relates to a prefabricated steel composite ramen bridge, and more particularly, to a prefabricated steel composite ramen bridge through a wall structure having a prefabricated steel composite girder and a corrugated inner wall structure.

The ramen bridge has a structure in which the wall of the abutment or pier, which is the lower structure, and the girder, which is the upper structure, are integrated. The traditional ramen bridge has a concrete or steel composite ramen structure, and the method of constructing the lower structure and the upper structure at the same time is applied. Recently, the demand for ramen bridges with long spans has increased, and accordingly, the case of separate construction of the upper structure of ramen bridges is increasing. Specifically, after installing pre-fabricated girders on the constructed walls, method is applicable in this case. The characteristics of this wall-girder separation construction ramen bridge method are as follows.

As the most representative example of wall and girder separation construction, there is a method of connecting the rest of the girders in a state in which a part of the right corner girder is prepared in advance. This technology has advantages in that girders can be prefabricated through separate construction and that the performance of prefabricated girders can be improved. However, this method may cause problems with the quality of right angle concrete. For example, cracks may occur in the concrete of the right angle due to the accumulation of rotational displacement and harmful stress on the right angle due to the load placed on the concrete floor plate. problem that arises. In addition, it is not a desirable method in terms of work safety because the girder connection work can be difficult due to the expansion and contraction of the girder and the camber, and this connection work must be solved by work at height.

Another example of pre-preparing a part of the right angle part girder is a method of pre-fabricating part of the right angle part concrete wall and part of the steel girder and then assembling them on site. Although this technology has the advantage of being able to prevent cracks at the right corner due to the load of the deck, there are still problems with connecting the girder later and requiring high-altitude work.

There is also a technology to connect the girder and the wall by providing a separate fixing device on the right corner. This technology is a method of providing a separate girder support on the wall, mounting the girder on it, and then fixing the end of the girder by fastening it with a separately provided connection bolt. This technology has the advantage of introducing prestress that is advantageous to the girder by introducing tension to the connecting bolt. However, there are disadvantages in that a considerable amount of cost is required to prepare these fixtures, that the process is complicated, and that the effect of the advantages obtained compared to these inputs is not great.

As another technology for connecting with a fixing device, there is a method of integrating the girder and the wall through a separate mechanical joint by inserting a girder after blockout at the right corner of the wall. This technology has the advantage of being able to construct girders and walls in a prefabricated manner. However, as mentioned above, this technology also has a problem in that the assembly may be difficult because the accuracy of the connection device between the wall and the girder does not match. In addition, in this construction method, vertical-transverse connectors are provided on the walls and girders, respectively, and these connectors can be displaced by the expansion and contraction of the girder and camber. As the extension of the girder increases, the error problem becomes larger, and there are many details to be prepared, so the process is complicated and the construction is crude.

The present invention was made to solve the problems of the prior art described above, to provide a prefabricated steel composite ramen bridge in which workability and work safety are improved by providing a fully synthetic type of girder and ramen bridge substructure and prefabricating them. it is for

A prefabricated steel-composite ramen bridge according to an embodiment of the present invention for solving the above-mentioned technical problem is formed in an I-type or H-type and has a girder having corrugated inner wall coupling parts at both ends; A precast floor plate coupled to the upper surface except for both ends of the girder; and

It is coupled to the blockout part provided in the lower structure of the ramen bridge and the corrugated inner wall coupling part of the girder is inserted therein and integrated with the corrugated inner wall coupling portion and the lower structure of the ramen bridge by grouting.

The precast bottom plate includes a bottom plate body provided in a plate shape; A concave portion provided at an end of the bottom plate body and formed in a stud shape so that the anchor reinforcing bar is inserted; and a protrusion provided at the lower end of the bottom plate body.

The concave portion is provided to block out from the end of the bottom plate body to a predetermined length and depth in the direction of the shear pocket provided at the center of the bottom plate body, and an enlarged block-out portion is provided at one end of the intaglio portion to one end of the anchor reinforcing bar. It is characterized in that a part is inserted.

The anchor reinforcing bars, a pair of reinforcing bars having threads at both ends; a spacer connecting the pair of reinforcing bars in a vertical direction; and a fastening nut connecting the ends of the pair of reinforcing bars and the spacer.

The corrugated inner wall portion is provided adjacent to the sides of both ends of the girder and has irregularities sequentially protruding in the transverse direction of the girder around a line parallel to the longitudinal direction of the girder. A pair of longitudinal boundary plates; Transverse boundary plates provided to be adjacent to the ends of the girders and provided to protrude sequentially in the longitudinal direction of the girders around a line parallel to the transverse direction of the girders; and a lower plate connected to respective lower surfaces of the longitudinal boundary plate and the transverse boundary plate.

It further includes a 'c'-shaped reinforcing plate provided to surround the circumferences of the pair of longitudinal boundary plates and the transverse boundary plate, and the 'c'-shaped reinforcing plate has an inner circumferential surface of the blockout when the grouting is placed. And it is characterized in that a plurality of coupling grooves for coupling a plurality of vertical rods for increasing the coupling force with the corrugated inner wall portion is provided.

The 'c'-shaped reinforcing plate is coupled to a convexly formed convex part in the transverse boundary plate, and one side of the longitudinal boundary plate is formed to correspond to the waveform of the longitudinal boundary plate.

The corrugated inner wall coupling part includes a plurality of grooves provided on the abdomen of both ends of the girder; A coupling plate coupled to the abdomen of both ends of the girder and including through grooves corresponding to a plurality of grooves; A loop-type reinforcing bar coupled to the abdomen of the girder through the groove and the through hole and formed to protrude in the transverse direction of the girder; and vertical reinforcing bars vertically penetrating between the loop-type reinforcing bars.

The grooves and the through grooves are provided to form rows and columns in a matrix form along the abdomen, and both ends of the loop-type reinforcing bars are fixedly coupled to the abdomen of the girder, and the loop-type reinforcing bars do not interfere with each other. The shaped reinforcing bars are characterized in that they are arranged in a zigzag pattern in the vertical direction.

The corrugated inner wall coupling part is coupled to a preset position of the girder so that the grouting does not escape from the corrugated inner wall coupling portion when the end of the girder and the corrugated inner wall portion are coupled, and includes a finishing form protruding from the girder in the transverse direction characterized by

According to the present invention, the girder and the lower structure of the ramen bridge are provided in a fully synthetic type, and the end of the girder assembled with the precast floor plate is inserted into the corrugated inner wall and then grouted, thereby improving workability and work safety.

1 is a perspective view showing that a girder of a prefabricated steel-composite ramen bridge is manufactured according to an embodiment of the present invention;
2 is a perspective view showing a corrugated inner wall according to an embodiment of the present invention;
3a and 3b are enlarged perspective views specifically showing the end of a girder according to an embodiment of the present invention;
4a and 4b are conceptual views showing that a girder and a corrugated inner wall are combined according to an embodiment of the present invention;
5a and 5b are perspective views showing a precast floor plate according to an embodiment of the present invention;
6A and 6B are perspective views showing that a precast floor plate according to an embodiment of the present invention is coupled to a girder and a ramen bridge lower structure.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

Hereinafter, a prefabricated steel composite ramen bridge according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view showing that a girder of a prefabricated steel composite ramen bridge is manufactured according to an embodiment of the present invention, FIG. 2 is a perspective view showing a corrugated inner wall part according to an embodiment of the present invention, and FIGS. 3a and 3b are of the present invention. It is an enlarged perspective view specifically showing the end of the girder according to the embodiment, and FIGS. 4A and 4B are conceptual views showing that the girder and the corrugated inner wall portion are combined according to the embodiment of the present invention, and FIGS. 5A and 5B are an embodiment of the present invention. It is a perspective view showing a precast floor plate according to an example, and FIGS. 6A and 6B are perspective views showing that a precast floor plate according to an embodiment of the present invention is coupled to a girder and a ramen bridge lower structure.

1 to 6B, the prefabricated steel-composite ramen bridge according to an embodiment of the present invention includes a girder 110, a corrugated inner wall part 120, a blockout part 130, a precast deck 140, an anchor Rebar 150 and grouting (G) are included.

The girder 110 may be provided so that the pre-flex is introduced, but it is also possible to be provided so that the pre-flex is not introduced.

For the introduction of pre-flex, as shown in FIG. 1, the girder 110 can be mounted on the pre-flex steel beam manufacturing table 10 and prevented from lateral buckling by the lateral buckling prevention device 20.

The girder 110 is formed in an I-shape or H-shape and has corrugated inner wall couplings at both ends, and includes an upper flange 111, a lower flange 113, and a web 112, and is attached to the upper flange 111. A shear connection member 115 and a grouting backup member 119 are provided.

The corrugated inner wall coupling part includes a coupling plate (P1), a lower flange reinforcement plate (P2), a loop-type reinforcing bar 117, and a vertical reinforcing bar 118.

Referring to Figures 3a and 3b, the corrugated inner wall coupling portion is shown in detail. A plurality of grooves h2 are arranged in a matrix shape on the abdomen 112 at both ends of the girder 110, and a finishing formwork 114 is provided at the other end of the corrugated inner wall coupling part of the abdomen 112 in which the grooves h2 are formed. ) is provided to protrude in the transverse direction of the girder 110.

Referring to FIG. 3B , the coupling plate P1 is coupled to the abdomen 112 at both ends of the girder 110 and includes through-holes h1 corresponding to the plurality of grooves h2. The coupling plate P1 is provided to reinforce both ends of the girder 110 and may be welded to both ends of the girder 110.

At both ends of the girder 110, a loop-type reinforcing bar 117 formed to protrude in the transverse direction of the girder 110 and coupled to the abdomen 112 of the girder 110 through the groove h1 and the through groove h2 is provided

The grooves h1 and the through grooves h2 are provided along the abdomen to form rows and columns in a matrix form, and both ends of the loop-type reinforcing bars 117 are fixedly coupled to the abdomen 112 of the girder 110, but the loop The loop-type reinforcing bars 117 are arranged in a zigzag pattern in the vertical direction so that the type reinforcing bars 117 do not interfere with each other. The loop-type reinforcing bar 117 is fixedly coupled to the through groove h1 formed in the coupling plate P1 and the groove h2 formed in the abdomen 112 through the left and right ends through the coupling portion J.

More specifically, in the first row of the U-shaped loop-type reinforcing bars 117, the left and right ends of the loop-type reinforcing bars 117 occupy the first and second rows of the through groove h1 and the groove h2, but loop vertically It is formed so that the part with and without the molded reinforcing bar is alternated. In addition, in the second column of the loop-type reinforcing bars 117, the left and right ends of the loop-type reinforcing bars 117 occupy the second and third columns of the through groove h1 and the groove h2, but the part with and without the loop-type reinforcing bar vertically are formed so that they alternate. At this time, the part with loop-type reinforcing bars in the second row of loop-type reinforcing bars 117 and the part without loop-type reinforcing bars in the first row of loop-type reinforcing bars 117 may be provided at the same height.

Referring to FIG. 4B, the loop-type reinforcing bars 117 are provided to correspond to the waveform of the longitudinal boundary plate 121 when viewed in plan.

The finishing form 114 is coupled to a preset position of the girder 110 so that the grouting G does not escape from the corrugated inner wall coupling portion when the end of the girder 110 and the corrugated inner wall portion 120 are coupled. The closing die 114 may be coupled to the binding slot hole h3 for binding the closing die 114, but may also be coupled to the abdomen 112 by welding or the like. The slot hole h3 for binding may be provided longer in the longitudinal direction of the girder 110 than the through hole h2. Here, the preset position may be set to a place corresponding to the other end of the corrugated inner wall coupling part of the abdomen 112 where the groove h2 is formed or the end of the grouting backup material 119.

Flange grooves 116 are provided on the upper flange 111 and the lower flange 113 at both ends of the girder 110, and vertical reinforcing bars 118 vertically penetrating between the loop-type reinforcing bars 117 are formed. A lower flange reinforcing plate P2 may be provided below the lower flange 113 to reinforce the rigidity of the lower flange.

The corrugated inner wall portion 120 is inserted into the blockout portion 130 provided in the lower ramen bridge structure 50, and is combined with the lower ramen bridge structure 50 by grouting (G), as well as the corrugated inner wall portion ( 120) and is coupled to the end of the girder 110.

The corrugated inner wall portion 120 is provided adjacent to the side surfaces of both ends of the girder 110 and has irregularities that sequentially protrude in the transverse direction of the girder 110 around a line parallel to the longitudinal direction of the girder 110. A pair of longitudinal boundary plates 121, provided adjacent to the end of the girder 110 to be inserted, and sequentially protruding in the longitudinal direction of the girder 110 centered on a line parallel to the transverse direction of the girder 110 A transverse boundary plate 123 having irregularities provided, a lower plate 129 connected to each lower surface of the longitudinal boundary plate 121 and the transverse boundary plate 123, a pair of longitudinal boundary plates 121, Block-out portion 130 when grouting such as concrete or non-shrinkage mortar is placed on the 'c'-shaped reinforcing plate 125 and 'c'-shaped reinforcing plate 125 prepared to surround the circumference of the transverse boundary plate 123 ) Includes a plurality of coupling grooves 126 for coupling a plurality of vertical rods 127 to increase the bonding force between the inner circumferential surface and the corrugated inner wall portion 120.

In addition, the corrugated inner wall portion 120 is connected to the lower plate 129 connected to each lower surface of the longitudinal boundary plate 121, the transverse boundary plate 123, and the longitudinal boundary plate 121 and the transverse boundary plate 123. It includes a coupling space 128 to which the end of the girder 110 can be coupled by.

The longitudinal boundary plate 121 includes longitudinal horizontal plates 121a and 121b provided at both ends, a recessed portion 121d provided concavely, and a convex portion 121c formed convexly. Here, the convex part and the convex part are considered based on the view from the 'c'-shaped reinforcing plate 125, and the convex part becomes the convex part and the convex part becomes the convex part when viewed from the perspective of the coupling space 128.

The transverse boundary plate 123 includes transverse horizontal plates 123a and 123b provided at both ends, a convex part 123c, and a recessed part 123d. Also, the convex part and the convex part are considered based on the view from the 'c'-shaped reinforcing plate 125, and the convex part becomes the convex part and the convex part becomes the convex part when viewed from the perspective of the coupling space 128.

The branch portion 125c of the 'c'-shaped reinforcing plate 125 is coupled to the convex portion 123c in the transverse boundary plate 123, and in the longitudinal boundary plate 121, one side of the longitudinal boundary plate 121 It is formed to correspond to the waveform and the other side is provided in a linear shape. The central portion 125a of the 'c'-shaped reinforcing plate 125 is linearly coupled to the transverse boundary plate 123.

The 'c'-shaped reinforcing plate 125 may be provided with a plurality of layers, and a coupling groove 126 is provided at a location corresponding to the recessed portion 121d of the longitudinal boundary plate 121, and the vertical rod 127 is recessed ( 121d).

The corrugated inner wall portion 120 couples the girder 110 and the ramen bridge lower structure 50 by the principle of shear friction resistance. The girder 110 connected to the corrugated inner wall portion 120 is strongly constrained by the shear friction resistance principle of the corrugated inner wall portion 120. At this time, two conditions are required for strong restraint, the first is the stiffness of the corrugated inner wall portion 120, and the second is the integrity with the girder 110.

The stiffness of the corrugated inner wall portion 120 corresponds to the stiffness of the wall of the lower structure 50 of the ramen bridge. The wall of the ramen bridge substructure 50 is a transverse continuous reinforced concrete structure with a thickness of 1 meter or more. Therefore, once the corrugated inner wall portion 120 is provided on the wall of the ramen bridge lower structure 50, the stiffness around the structure is so great that the deformation can be ignored.

Integrity with the girder 110 can be secured by the corrugated inner wall coupling part composed of the shear connector provided on the girder 110. In the construction process, after inserting the girder 110 into the corrugated inner wall portion 120 of the lower structure of the ramen bridge 50, the empty space is grouted with a high-strength material. At this time, the grouted concrete material and the girder 110 are integrated with the corrugated inner wall coupling part including the coupling plate P1, the lower flange reinforcement plate P2, the loop-type reinforcing bar 117, and the vertical reinforcing bar 118. The loop-type reinforcement 117 is provided to correspond to the waveform of the longitudinal boundary plate 121 of the corrugated inner wall portion 120 to improve integrity and soundness.

The waveform of the longitudinal boundary plate 121 resists the expansion and contraction of the combination of the girder 110 and the grouting, and the waveform of the transverse boundary plate 123 resists the vertical movement of the combination of the girder 110 and the grouting. resist the motion

The precast floor plate 140 is coupled to the upper part of the girder 110, and a shear pocket 147 is provided in the center, into which the shear connector 115 is inserted, and connected to the anchor reinforcing bar 150 by grouting.

When the girder 110 is provided as a pre-flex, the precast floor plate 140 may be formed to have a curvature corresponding to the curvature of the girder 110.

5a and 5b, the precast floor plate 140 is provided at the end of the floor plate body 141 and the floor plate body 141 provided in a plate shape, but is formed in a stud shape, so that the anchor reinforcement 150 is A concave portion 143 provided to be inserted, a protrusion 149 provided at the lower end of the bottom plate body 141, a shear groove 144 provided as a groove at the end side of the bottom plate body 141 and grouted, the bottom It includes a heonchi portion 145 provided to protrude from the lower portion of the plate body 141 and a cross-sectional extension portion 148 provided on the side of the lower surface of the bottom plate body 141.

The intaglio portion 143 is provided to be blocked out from the end of the bottom plate body 141 to a predetermined length and depth in the direction of the front end pocket provided in the center of the bottom plate body 141, and one end of the intaglio portion 143 ( An enlarged blockout portion 143a is provided at the inner end of the bottom plate body) and one end of the anchor reinforcing bar 140 is inserted.

Both ends of anchor reinforcing bars 150 are inserted into both ends of the enlarged block-out portion 143a of one bottom plate 140 and the enlarged block-out portion 143a of the adjacent bottom plate 140, respectively, and then grouted. One bottom plate 140 and the neighboring bottom plate 140 are connected.

A cross-section expansion part 148 is provided at the lower end side of the bottom plate 140 (the bottom side of the bottom plate body) in consideration of the cross-sectional loss of the portion that cannot be filled with grouting when the bottom plates 140 are connected. A protrusion 149 is provided at the lowermost end of the plate body 141 (that is, the lowermost end of the bottom plate body or the uppermost end of the cross-sectional extension) to block grouting leakage.

Although not shown, protrusions may be provided at corners of the bottom plate body 141 to block grouting leakage, and a backup material may be attached to the protrusions to prevent grouting leakage. The back-up material is made of an elastic material, and the protrusion of the bottom plate 140 connected to one of the protrusions of the bottom plate 140 meets and elastically contracts within the gap generated to additionally block leakage.

The anchor reinforcing bar 150 includes a pair of reinforcing bars 151 and 153 threaded at both ends, a spacer 155 connecting the pair of reinforcing bars 151 and 153 in the vertical direction, and a pair of reinforcing bars 151, 153) and a fastening nut 157 connecting the end of the spacer 155.

The pair of reinforcing bars 151 and 153 include an upper reinforcing bar 151 and a lower reinforcing bar 153, and the pair of reinforcing bars 151 and 153 and the spacer 155 are provided in a rectangular shape, and the bottom plate 140 ) At the time of manufacture, the anchor reinforcement 150 and the corresponding reinforcement have a standard hook or closed end, so that continuity with the anchor reinforcement 150 is ensured.

In the construction method of a prefabricated steel composite ramen bridge according to an embodiment of the present invention, the girder 110 is mounted on the pre-flex steel beam manufacturing table 10 as shown in FIG. The first construction step to be manufactured to prevent, the shear pocket 147 is provided in the center of the upper part of the girder 110 with the introduction of soaring and the shear connector provided at the top, the shear connector 115 is inserted, and the anchor reinforcing bar 150 and The second construction step of mounting the precast floor plate 140 connected by grouting, the third construction step of connecting the precast floor plate 140 to each other by performing grouting on the top of the precast floor plate 140, FIG. As shown in 6a, the fourth construction step of inserting the end of the girder 110 into the corrugated inner wall portion 120 provided in the lower structure 50 of the ramen bridge, and the fourth construction step of completing the prefabricated steel composite ramen bridge by performing grouting as shown in FIG. 6b. It includes 5 construction stages.

According to the present invention, the girder and the lower structure of the ramen bridge are provided in a fully synthetic type, and the end of the girder assembled with the precast floor plate is inserted into the corrugated inner wall and then grouted, thereby improving workability and work safety.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

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

110: girder
120: corrugated inner wall
130: blockout unit
140: precast bottom plate
150: anchor rebar

Claims (10)

A girder formed in an I-type or H-type and having corrugated inner wall couplings at both ends;
A precast floor plate coupled to the upper surface except for both ends of the girder; and
A corrugated inner wall portion coupled to the blockout portion provided in the lower ramen bridge structure and inserted into the corrugated inner wall coupling portion of the girder to be integrated with the corrugated inner wall coupling portion and the lower structure of the ramen bridge by grouting; Including,
The corrugated inner wall portion,
A pair of longitudinal boundary plates provided adjacent to side portions of both ends of the girder and having irregularities sequentially protruding in the transverse direction of the girder around a line parallel to the longitudinal direction of the girder;
Transverse boundary plates provided to be adjacent to the ends of the girders and provided to protrude sequentially in the longitudinal direction of the girders around a line parallel to the transverse direction of the girders; and
A prefabricated steel composite ramen bridge including a lower plate connected to each lower surface of the longitudinal boundary plate and the transverse boundary plate. According to claim 1,
The precast floor plate,
A bottom plate body provided in a plate shape;
A concave portion provided at an end of the bottom plate body and formed in a stud shape to insert anchor reinforcing bars; and
A prefabricated steel composite ramen bridge comprising a; protrusion provided at the lower end of the deck body. According to claim 2,
The intaglio portion is provided to be blocked out at a predetermined length and depth in the direction of the shear pocket provided in the center of the bottom plate body from the end of the bottom plate body,
A prefabricated steel composite ramen bridge, characterized in that an enlarged blockout portion is provided at one end of the concave portion and one end of the anchor reinforcing bar is inserted. According to claim 3,
The anchor reinforcement,
A pair of rebar threaded at both ends;
a spacer connecting the pair of reinforcing bars in a vertical direction; and
A prefabricated steel composite ramen bridge comprising a; fastening nuts connecting the ends of the pair of reinforcing bars and the spacer. delete According to claim 1,
Further comprising a 'c'-shaped reinforcing plate provided to surround the circumferences of the pair of longitudinal boundary plates and the transverse boundary plates,
Prefabricated steel characterized in that the 'c'-shaped reinforcing plate is provided with a plurality of coupling grooves for coupling a plurality of vertical rods for increasing the coupling force between the inner circumferential surface of the block-out portion and the corrugated inner wall portion when the grouting is cast. synthetic ramen bridge. According to claim 6,
The 'c'-shaped reinforcing plate is coupled to the convex part formed in the transverse boundary plate, and in the longitudinal boundary plate, one side is formed to correspond to the waveform of the longitudinal boundary plate. Prefabricated steel composite, characterized in that Ramen religion. According to claim 1,
The corrugated inner wall coupling part
A plurality of grooves provided on the abdomen of both ends of the girder;
A coupling plate coupled to the abdomen of both ends of the girder and including through grooves corresponding to a plurality of grooves;
A loop-type reinforcing bar coupled to the abdomen of the girder through the groove and the through hole and formed to protrude in the transverse direction of the girder; and
A prefabricated rigid ramen bridge comprising a vertical reinforcing bar vertically penetrating between the loop-type reinforcing bars. According to claim 8,
The groove and the through hole are provided to form rows and columns in a matrix form along the abdomen,
Both ends of the loop-type reinforcing bars are fixedly coupled to the abdomen of the girder, and the loop-type reinforcing bars are arranged zigzag in the vertical direction so that the loop-type reinforcing bars do not interfere with each other. According to claim 8,
The corrugated inner wall coupling part is coupled to a preset position of the girder so that the grouting does not escape from the corrugated inner wall coupling portion when the end of the girder and the corrugated inner wall portion are coupled, and includes a finishing form protruding from the girder in the transverse direction Prefabricated steel composite ramen bridge, characterized in that.

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