KR20090102084A - Expansion and construction joint apparatus for a bridge - Google Patents

Abstract

PURPOSE: An expansion joint for a bridge is provided to prevent the damage of a bridge structure by the movement to the X-axis and Y-axis directions by slidably providing a connection rotator between first and second upper plate connectors. CONSTITUTION: An expansion joint for connecting upper plates of a separated bridge is composed of first and second upper plate connectors(110,112), many connection rotators(120), first and second blocking units(130,132), and a finger(140). First and second guide grooves(110a,112a) are arranged along the one longitudinal side in the first and second upper plate connectors. The first and second upper plate connectors are arranged so that the first and second guide grooves faces to each other. Many connection rotators are slidably inserted in the guide grooves. The first and second blocking units are combined to the other side of the first and second upper plate connectors. The finger is protruded to the side of the first and second blocking units.

Description

Expansion and construction joint apparatus for a bridge

The present invention relates to an expansion joint device for bridges or plate-shaped bridges, and more particularly, by improving the structure of the main body to a structure capable of moving in both directions of the X and Y axes in the event of an earthquake, behavior due to earthquakes It prevents damage to the structure due to the expansion joint connected to the structure in case of occurrence, and the secondary damage to the lower structure due to the traffic congestion problem caused by the vehicle control and the rapid replacement of the damaged rubber waterproofing material cannot be performed. The present invention relates to a bridge expansion joint that can solve the problem.

In general, in a relatively long bridge having a large number of bridges, the top plate of the bridge is divided into several parts in the longitudinal direction of the bridge to cope with the expansion and contraction of the bridge according to the temperature change, and stretched between each divided top slab. Install the joints. Such expansion joints should be manufactured considering the durability, flatness and watertightness of bridges.

4 is a view showing the structure of the expansion joint device for a bridge in the prior art. As shown in the drawing, the conventional expansion joint device for bridges are respectively installed to be engaged with each other at the facing end of the divided bridge upper plate portion, and the upper cover plate 101a (101b) to stretch and act according to the temperature change, and Anchor bolts 102 for binding and fixing the upper cover plates 101a and 101b to the futa concrete 105, increasing the binding force between the anchor bolts 102 and the futa concrete 105, and reinforcing the strength of the futa concrete 105. Reinforcement for the reinforcement 103 and, both ends of the futa concrete 105 is composed of a rubber waterproofing material 104 for rainwater and foreign matter collection is installed so that the end is fixed respectively. Reference numeral 106 denotes slab reinforcing bars inside the upper plate of the bridge.

However, the conventional expansion joint device for bridges having the above-described configuration may be behaved by the amount of expansion and contraction in the traveling direction of the vehicle in the event of an earthquake, but may not be moved at all in the left and right horizontal directions perpendicular to the traveling direction of the vehicle. Also, it does not allow the movement even when it moves up and down, and it is the expansion joint which is connected to the structure when the earthquake occurs on the slab and the girder at the end where the expansion joint is installed, and the chest wall of the shift. This may damage the structure and cause top off.

In addition, after anchoring the rubber waterproofing material 104 to the slab concrete before installation of the upper cover plate (101a) (101b), install the upper cover plate (101a) (101b) and tighten the nut to the anchor bolt (102) This completes the installation of the expansion joint bar, it is very difficult to replace the damaged rubber waterproofing material 104 without opening the upper cover plate 101a, 101b after traffic control when the rubber waterproofing material 104 is damaged. And this causes additional damage of the lower structure caused by the leakage. As a result, the conventional expansion joint device for bridges of the above-described configuration is unable to prevent accidents of breakage and collapse of the bridge due to vehicle increase and earthquake, and thus there is a risk of economic loss.

The present invention is to solve the above problems, an object of the present invention is to provide a connecting slidable between the first and second upper plate connector to be slidable damage to the bridge structure according to the movement in the X-axis and Y-axis direction To provide an improved expansion joint for bridges that can prevent.

It is another object of the present invention to provide an improved expansion joint device for bridges which can prevent the increase of the slab end and the gutter end blood so that the free end of the anchor bolt is provided in a grid-like mesh so that the futa concrete is not broken.

In order to achieve the above object, the present invention,

Expansion joint to connect the top plate of the bridge,

A plurality of first and second guide grooves arranged in a sawtooth shape along one side of the longitudinal direction, the first and second upper connector having the first and second guide grooves facing each other;

A plurality of connecting rotors slidably fitted in the first and second guide grooves of the first and second upper plate connectors;

First and second blocking support holes respectively coupled to rear surfaces of the first and second upper plate connectors;

At least one finger protruding in the lateral direction of the first and second blocking pedestals and disposed in parallel to each other; It is achieved by providing a expansion joint device for a bridge comprising a.

Here, it is preferable that at least one or more coupling grooves are formed in the finger.

At least one anchor bolt protrudes from a rear surface of the first and second top plate connectors, and a net body having a grid shape is provided at a free end of the anchor bolt.

The network is preferably one selected from iron and reinforcing bars.

Bridge expansion and contraction apparatus of the present invention, a plurality of guide grooves are formed along one side of the first and second top plate connector facing each other in the longitudinal direction, the back surface of the blocking base which the first and second top plate connectors are respectively placed Is provided with at least one anchor bolt vertically, at least one finger in one direction, and slidably provide a connecting rotor between the second upper connector, so that the connecting rotor is formed of the first and second upper connector The sliding movement in the guide groove can be prevented damage to the bridge structure as the movement in the X-axis and Y-axis direction is possible.

In addition, the expansion joint device for the bridge of the present invention is provided with the free end of the anchor bolt in the grid-like mesh can prevent the increase of the slab end and the gutter end blood so that futa concrete is not broken.

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

2 is a front view of FIG. 1;

3 is a top view of FIG. 1; And

Figure 4 is a perspective view of the expansion joint device for bridges according to the prior art.

Explanation of symbols on the main parts of the drawings

110,112: first and second top connector 110a, 112a: first and second guide groove

120: connecting rotating body 130,132: first, second blocking base

140: finger 142: coupling groove

150: anchor bolt 152: mesh

160: Futa concrete 162: bridge block

164: rubber waterproof

Hereinafter, with reference to the accompanying drawings the contents of the present invention through a preferred embodiment of the present invention will be described in detail. The following examples are merely examples and do not limit the present invention.

1 is a perspective view of the expansion joint device 100 for a bridge according to an embodiment of the present invention. As shown in the drawing, the expansion joint device for bridges of the present invention includes a plurality of connection circuits slidably disposed between the first and second top plate connectors 110 and 112 and the first and second top plate connectors 110 and 112. The first 120 and the first and second blocking support ports 130 and 132 disposed on the rear surface of the first and second upper plate connectors 110 and 112, respectively, and the first and second blocking support ports 130 and 132. At least one finger 140 is provided.

A plurality of first and second guide grooves 110a and 112a are formed in a sawtooth shape along one side of the first and second upper plate connectors 110 and 112. The first and second top plate connectors 110 and 112 are disposed so that the first and second guide grooves 110a and 112a face each other (see FIG. 2).

The connecting rotor 120 is slidably fitted into the first and second guide grooves 110a and 112a of the first and second upper plate connectors 110 and 112, respectively. That is, one end of the connecting rotor 120 is fitted into the first guide groove 110a of the first upper plate connector 110 facing each other, and the other end of the connecting rotor 120 is connected to the second upper plate connector 112. It fits in the 2nd guide groove 112a (refer FIG. 2).

The first and second blocking support holes 130 and 132 are disposed along a length direction on the rear surface of the first and second upper plate connecting parts 110 and 112. In FIG. 1, the shape is “a” but is not limited thereto.

The finger 140 protrudes in at least a horizontal direction with respect to the back surface of the first and second upper plate connectors 110 and 112 in one direction of the first and second blocking support holes 130 and 132, and each finger ( 140 are arranged parallel to each other. At least one or more engaging grooves 142 are preferably formed in the finger 140 (see FIG. 3).

Here, at least one anchor bolt 150 protrudes downward from the rear surface of the first and second upper plate connectors 110 and 112, and a mesh 152 having a grid shape is formed at the free end of the anchor bolt 150. It is preferred to be provided. The net body 152 is preferably one selected from iron and reinforcing bars. It is preferable that the anchor bolt 150 is fixed to the futa concrete 160.

For reference, reference numeral 164 in the drawings is a rubber waterproof member disposed between the first and second blocking support holes 130 and 132.

An operation of the expansion joint device for a bridge according to an embodiment of the present invention having the structure as described above will be described with reference to the accompanying drawings.

Referring back to FIGS. 1 to 3, first and second upper plate connectors 110 and 112 are disposed such that respective first and second guide grooves 110a and 112a face each other. Subsequently, both ends of the connection rotating body 120 are slidably fitted into the first and second guide grooves 110a and 112a corresponding to each other. In this state, each of the connecting rotors 120 is in a state capable of freely sliding in the first and second guide grooves 110a and 112a of the first and second upper plate connectors 110 and 112. .

In addition, the upper surface of the first and second blocking base openings 130 and 132 is fixed by mounting the first and second upper plate connectors 110 and 112. A rubber waterproof member 164 is provided between the first and second blocking support holes 130 and 132. The anchor bolt 150 protrudes vertically downward of the first and second blocking support holes 130 and 132. Each finger 140 protrudes horizontally in the opposite direction with respect to the rubber waterproof member 164 to be perpendicular to the surfaces of the first and second blocking pedestals 130 and 132. At this time, a plurality of coupling grooves 142 are formed in the finger 140 to be more firmly fixed to the bridge block 162. In addition, an end of the anchor bolt 150 is provided with a mesh 152 which can also be more firmly fixed to the bridge block 162.

In this way, the connecting rotor 120 of the first and second guide grooves 110a and 112a formed in the first and second upper plate connectors 110 and 112 at the time of expansion and contraction of the bridge according to the temperature change during vehicle driving. Are freely moved inside the first and second guide grooves 110a and 112a. That is, it becomes a stretchable condition in which the first and second top plate connectors 110 and 112 may be close to or far from each other. For this reason, breakage of the bridge block 162 can be prevented.

Claims (4)

Expansion joint to connect the top plate of the bridge, A plurality of first and second guide grooves arranged in a sawtooth shape along one side of the longitudinal direction, the first and second upper connector having the first and second guide grooves facing each other; A plurality of connecting rotors slidably fitted in the first and second guide grooves of the first and second upper plate connectors; First and second blocking support holes respectively coupled to rear surfaces of the first and second upper plate connectors; And At least one finger protruding in the lateral direction of the first and second blocking pedestals and disposed in parallel to each other; Expansion joint device for a bridge comprising a. The expansion joint device for a bridge according to claim 1, wherein at least one coupling groove is formed in the finger. 2. The expansion joint apparatus for a bridge according to claim 1, wherein at least one anchor bolt protrudes from a rear surface of the first and second upper plate connectors, and a mesh having a grid shape is provided at a free end of the anchor bolt. 4. The expansion joint apparatus for a bridge according to claim 3, wherein the mesh is one selected from iron and reinforcing bars.