KR200241141Y1 - Expansion joint for connecting slabs of a bridge structure - Google Patents

Abstract

The present invention, in the expansion joint device for a bridge having a pair of main plate material which is spaced apart from each other at a predetermined interval between a pair of bridge top plate connected to each other and the inner edge has a wave shape, A hollow elastic member bonded to the inner wall of the plate to stretch the pair of main plates; It is characterized in that it comprises at least one dummy member coupled to the inner wall surface of each main plate material to prevent the elastic member from being separated from the inner wall surface of the main plate material. Thereby, a bridge expansion and contraction device for preventing the elastic member from being separated from the main plate material is provided.

Description

Expansion joints for bridges {EXPANSION JOINT FOR CONNECTING SLABS OF A BRIDGE STRUCTURE}

The present invention relates to a bridge expansion joint device, and more specifically, to prevent the separation of the elastic member interposed in the bridge expansion joint device.

The structure of the bridge expands and contracts with temperature changes and loads. Therefore, the upper structures of bridges constructed over a certain length have a proper spacing (generally called 'gap') for each length. The expansion joints are installed at intervals between the upper structures, and the expansion joints prevent damage to the upper structures of the bridge, and the vehicle runs smoothly.

7 is a longitudinal sectional view of a conventional expansion joint device. As shown in this figure, a conventional expansion joint device for bridges are coupled to the main plate material 110 and the main plate material 110, which are arranged to face each other at predetermined intervals between the bridge top plate, while the reinforcing bars are accommodated. It has a plurality of anchors 116 embedded in the bridge deck.

The main plate 110 has a horizontal member 113 arranged in parallel with the plate surface of the bridge top plate, and a vertical member 112 extending downward from the horizontal member 113. The inner edge of each horizontal member 113 disposed to face each other has a wave shape in which the valley portion and the top portion are repeatedly formed. An elastic member 130 is attached between the vertical member 112 and the horizontal member 113 to assist the stretching operation of the pair of main plate members 110.

In the case of installing such expansion joints, first, the expansion joints are continuously installed along the longitudinal direction between the bridge decks, and then the steel bars are accommodated and welded to the anchor 116, and then the space between the bridge decks and the expansion joints. This is done by grouting.

At this time, the interval between the horizontal member and the elastic member may be left as an empty space without additional filling, in some cases, as shown in the figure, by filling the sealing agent (S) the horizontal member 113 and The foreign material is prevented from invading at a spaced interval between the elastic members 130.

By the way, in such a conventional expansion joint device for bridges, there is a problem that the elastic member may be separated from the main plate material. As such, when the elastic member is separated from the main plate material, the expansion and contraction of the expansion joint device may not be smooth, and leakage occurs in the lower structure to corrode the structure, thereby shortening the life of the structure.

Accordingly, an object of the present invention is to provide an expansion joint device for a bridge that can prevent the elastic member from being separated from the main plate material.

1 is a perspective view of a expansion joint device for a bridge according to a first embodiment of the present invention,

Figure 2 is a partially exploded perspective view of the bridge expansion joint according to Figure 1,

3 is a cross-sectional view taken along line III-III of FIG. 1;

Figure 4 is a partially enlarged cross-sectional view of the expansion joint device for a bridge according to a second embodiment of the present invention,

Figure 5 is a partially enlarged cross-sectional view of the expansion joint device for a bridge according to the third embodiment of the present invention,

Figure 6 is a partially enlarged cross-sectional view of the expansion joint device for a bridge according to the fourth embodiment of the present invention,

7 is a longitudinal sectional view of a conventional expansion joint device for bridges.

* Explanation of symbols for the main parts of the drawings

12: vertical member 13: horizontal member

16: anchor 30: elastic member

40: sealing member 60: dummy member

The above object is, according to the present invention, in the expansion joint device for a bridge having a pair of main plate material which is spaced apart from each other at a predetermined interval between a pair of bridge top plate connected to each other and the inner edge is formed to have a wave shape. A hollow elastic member bonded to the inner wall of each of the main plate members to expand and contract the pair of main plate members; It is achieved by the expansion joint device for a bridge, characterized in that it comprises at least one dummy member coupled to the inner wall surface of each main plate material to prevent the elastic member from being separated from the inner wall surface of the main plate material.

Here, the main plate material has a pair of vertical members disposed in parallel to each other at a predetermined interval between the bridge top plate, and a horizontal member coupled horizontally to the upper end of the vertical member, the dummy member is made of metal It is advantageous that the vertical member and the horizontal member are welded to the inner surface that is in contact with each other.

The dummy member may be replaced with a nut.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention, the same reference numerals are assigned to the same configuration.

Bridge expansion joint according to the present invention, as shown in Figure 1, is coupled to the pair of main plate material 10 and the main plate material 10 spaced apart from each other at a predetermined interval in the area between the bridge top plate It has a plurality of anchors 16 embedded in the bridge deck.

The main plate material 10 is a pair of vertical members 12 arranged in parallel to each other at a predetermined interval, and the horizontal member 13 is horizontally coupled to the upper end of the vertical member 12 is disposed along the plate surface direction of the bridge top plate ) And a flange portion 14 which is horizontally coupled to the lower end of the vertical member 12. Here, the flange portion 14 may be welded to the side of the vertical member 12. In addition, the flange part 14 does not necessarily need to be formed.

The main plate 10 may be formed by cutting steel such as an H beam, or may be formed by welding the vertical member 12, the horizontal member 13, and the flange 14 made of a metal material to each other. The inner edge of the horizontal member 13 has a continuous wave shape.

A plurality of anchors 16 protruding from the plate surface of the vertical member 12 and embedded in the bridge top plate are formed outside the vertical member 12. Each anchor 16 is also formed of a metal material. The upper edge of the anchor 16 is formed with a plurality of reinforcing bar receiving portion (17, Fig. 2 and 3) cut down to accommodate the reinforcing bar. At this time, the receptacle receiving portion 17 'of the anchor 16' may be in the form of a through hole so that the reinforcing bar can be inserted, as shown in FIGS. In addition, as shown in FIG. 6, the anchor 16 ′ may be installed in the form of a long rod or a bent rod from the plate surface of each vertical member 12.

As shown in Figures 2 and 3, the connecting piece 19 is provided at both ends of the vertical member 12 so as to be mutually fastened with the main plate material 10 of the other expansion joint device disposed adjacent. The through piece 20 is formed in the plate surface so that the bolt can be inserted in the connecting piece 19. However, the connecting piece 19 may not only be recessed downward to accommodate the bolt but also may be recessed inward from the side.

In the region where the vertical member 12 and the horizontal member 13 abut each other, a dummy member 60 is provided to prevent the elastic member 30 to be described later from being separated from the main plate material 10. The dummy member 60, which can be replaced with a nut, is provided in plural along the longitudinal direction of the expansion joint device and welded to an area where the vertical member 12 and the horizontal member 13 come into contact with each other.

The hollow elastic member 30 is disposed between the vertical member 12 and the horizontal member 13 so that the pair of main plates 10 can be stretched and contracted with each other. The elastic member 30 includes a vertical portion 31 adhered to the inner wall surface of each vertical member 12, an upper horizontal portion 33 and a lower horizontal portion 35 connecting upper and lower ends of the vertical portion 31. ). At this time, although not shown, the elastic member 30 may be formed to be exposed to both ends of the expansion joint device.

At least some sections of the upper side 33 and the lower side 35 are curved. That is, the upper horizontal portion 33 has an almost 'Ｗ' cross-section wrinkle (in FIGS. 2, 3, and 5) formed in a zigzag shape. In addition, the lower horizontal portion 35 is formed with wrinkles (see Figs. 2, 3 and 4) bent upwards.

At this time, the wrinkles formed in the upper horizontal portion 33 may form a 'Ｗ' cross-sectional shape, as shown in the figure, in some cases, 'U' cross-sectional shape (see FIGS. 4 and 6) or inverse It is also possible to achieve other curves that are curved in the 'U' cross-section and in the free form. Wrinkles formed on the lower side 35 may also form another curved shape. In addition, the lower horizontal part 35 may not form the lower horizontal part 35 on the elastic member 30 as shown in FIGS. 5 and 6.

A predetermined space is formed between the upper horizontal part 33 and the horizontal member 13. The sealing member 40 is press-fitted into the spaced space to fit the spaced space to prevent foreign matter from entering. The sealing member 40 may be made by extrusion molding of rubber or press vulcanization. At this time, in the case of molding the sealing member 40 by extrusion molding, the support portion 41 may be formed in the middle so as to maintain the shape during extrusion.

On the other hand, the elastic member 30 is applied to the vertical member 12 and the horizontal member 13, the adhesive, and then vulcanized for 50 minutes or more while applying pressure while heating to approximately 130 ~ 150 ℃.

At this time, since the dummy member 60 such as a nut is welded to the area where the vertical member 12 and the horizontal member 13 contact each other, the elastic member 30 is disposed between the vertical member 12 and the horizontal member 13. When vulcanizing, as shown in FIG. 3, the upper edge of the elastic member 30 is spaced apart between the inner region A of the dummy member 60, the dummy member 60, and the main plate 10. The space B can be fitted. As such, when a part of the elastic member 30 is fitted into the empty spaces A and B generated by the dummy member 60, and the elastic member 30 is stuck to the dummy member 60, It is possible to provide an additional effect of preventing the elastic member 30 from being separated from the plate 10.

As described above, in the present invention, after the dummy member 60 such as a nut is welded to the inner wall surface of the main plate member 10, the elastic member 30 is vulcanized and adhered to the elastic member 30 from the main plate member 10. It is possible to prevent the departure.

In addition to the above embodiments, the dummy member may have a hook shape, a triangular plate, a loop shape, or the like. That is, when a plurality of dummy members having a hook shape are welded to the inner wall surface of the main plate, and then vulcanized and bonded to the elastic members, the elastic members may be prevented from being separated by the dummy members in addition to the adhesive force of the elastic members.

As described above, according to the present invention, there is provided a bridge expansion and contraction apparatus for preventing the elastic member from being separated from the main plate material.

Claims (3)

In the expansion joint device for a bridge having a pair of main plate material which is spaced apart from each other at a predetermined interval between a pair of bridge top plate connected to each other and the inner edge is formed to have a wave shape, A hollow elastic member bonded to an inner wall surface of each of the main plate members to mutually stretch the pair of main plate materials; And at least one dummy member coupled to the inner wall surfaces of the respective main plate members to prevent the elastic member from being separated from the inner wall surfaces of the main plate materials. The method of claim 1, The main plate member has a pair of vertical members disposed in parallel to each other at a predetermined interval between the bridge top plate, and a horizontal member coupled horizontally to the upper end of the vertical member, The dummy member is formed of a metal material, the expansion joint device for a bridge, characterized in that the vertical member and the horizontal member is welded to the inner surface in contact with each other. The method of claim 2, Stretching device for bridges, characterized in that the dummy member is a nut.