JPH036642Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) (Field of industrial application) This invention is an expansion joint device for bridge structures in rivers, valleys, elevated roads, etc., especially for reinforcing the edges of opposing deck slab ends. This invention relates to an expansion joint device.

(Prior art) In general, expansion joint devices are constructed in such a way that the joint members are supported via anchors or the like in notches at the ends of opposing floor slabs, and then concrete or the like is placed so that they are located between the opposing floor slabs. be done.

At this time, unless some kind of reinforcement is provided to the edge of the floor slab end, the load caused by passing vehicles will damage the edge.

As a reinforcing method, a structure in which steel plates are installed on the end faces of the deck slabs to support the load in the direction of the beams is well known.

This method can be quite effective, but because stress is concentrated on the line, it cannot necessarily keep up with the increase in load caused by the recent increase in the amount of travel of vehicles and the increase in the size of vehicles. Since the section modulus and resistance of a body are the same as a whole, damage in one place will continue to spread over a wide area, which has the disadvantage that repairs must be carried out over a wide area.

(Problems to be solved by the invention) This invention aims to solve the above-mentioned problems. Specifically, it increases the supporting force at the edge of the floor slab and prevents partial damage. The aim is to make it possible to solve problems with partial repairs.

(Structure of the idea) (Means for solving problems) The above problems are solved as follows.

That is, a plurality of box-shaped frames made of a metal material are positioned at each of the opposing floor slab ends so as to protrude in the clearance direction, and the ends of the plurality of box-shaped frames located at one floor slab end and the other The ends of the plurality of box-shaped frames located at the ends of the floor slabs are positioned so that they appear alternately in the free space, and the adjacent box-shaped frames at the ends of each floor slab are made of metal material. It is an essential requirement that the joint be connected by plates, and this can be solved by forming an expansion joint device by pouring concrete or the like using the usual method.

(Function) When the expansion joint device is formed in this way,
The load of vehicles, etc. applied to the edge of the floor slab is borne by the column structure, increasing the supporting capacity, and even if partial damage occurs, the plate is weaker than the box-shaped frame, so the column structure can be moved further away. The process ends when the plate breaks without the damage spreading to the frame.

(Example) Next, an example of the present invention will be described based on the drawings.

Fig. 1 is a partially omitted sectional view of the ends of opposing road bridge deck slabs in which the device of this invention is implemented, and Fig. 2 is a plan view of the main parts, where 1 is one end of the deck slab, 1' is the other end of the floor slab, 1a and 1'a are the well-known notches when constructing the floor slab, 2 is the opposite end of the floor slab 1,
The gap formed between 1' and 3, 3' is the floor slab end 1,
This is a box-shaped frame made of a metal material that is attached to the notches 1a, 1'a of the 1' to form an expansion joint.

The box-shaped frames 3, 3' are formed into a box-shaped frame by bending a steel plate, which is a metal material, as shown in FIG. The matching box-shaped frames 3, 3' are connected by welding by plates 5, 5' made of steel plates, respectively.

In this embodiment, the anchors 4, 4' are moved from behind the front plates 3a, 3'a of the box-shaped frames 3, 3' to the rear plate 3'.
b, 3'b.
Further, the upper sides of the side plates 3c, 3'c, 3d, and 3'd are formed so that the end opposite to the play direction has a downward slope or curvature, and the end in the play direction becomes a horizontal part. has been done.

The box-shaped frames 3, 3' thus formed are constructed in the following manner to constitute an expansion joint device.

First, the box-shaped frame 3 is placed in the notch 1a of one floor slab end 1 so that the front plate 3a is located in the play space 2, and the box-shaped frame 3' is placed in the notch 1a of the other floor slab end 1'. A front plate 3'a is positioned in a part 1'a so as to be located in a play space 2, so that a plurality of box-shaped frames 3 and 3' are alternately displayed in the play space 2. The floor slab ends 1, 1' are attached to the cutouts 1a, 1'a using anchors 6, 7, 8, 9.
Thereafter, backfilling concrete is placed in the notches 1a, 1'a to form backfilling layers 10, 10'. 11 and 12 are sealing rubber and joint material inserted into the clearance 2. 13 and 13' are reinforcing reinforcing bars extending in the width direction of the deck slab, and 14 and 14' are pavement layers.

In this way, an expansion joint device is formed as a whole.

(Effects of the invention) Since the invention is formed as described above, it has the following effects.

Since the box-shaped frame is located at the end face of the floor slab, the load of the traveling vehicle is received by the column structure, so the supported load can be increased compared to supporting the load in the direction of the beam.

Adjacent box frames are connected by plates, so even if one of the box frames breaks due to load, the plate has a smaller section modulus than the box frame and has less resistance, so they can be connected together. damage to the adjacent box frames. As a result, the damage is only partially suppressed and can be partially repaired.

At the opposing ends of the floor slabs, one end of the box-shaped frame is located between each gap and appears alternately within the gap, allowing the vehicle to run smoothly.

Since the box-shaped frame is a frame body, the top and bottom are not closed, so the backing material penetrates the top and bottom, and the integrity of the box-shaped frame and the backing material is strengthened.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially omitted sectional view of the end of an opposing road bridge deck in which the device of this invention is implemented; Fig. 2 is a plan view of the main part;
FIG. 3 is a detailed perspective view of the box-shaped frame. In the drawing, 1 and 1' are the ends of the floor slab, 1a,
1'a is a notch, 2 is a gap, 3, 3' is a box-shaped frame, 3a, 3'a are front plates, 3b, 3'b are rear plates, 3c, 3'c, 3d, 3'd is the side plate, 4,
4' is the anchor attached to the box frame, 5
is a plate, 6, 7, 8, 9 are anchors, 10, 1
0' is the backing layer, 11 is the seal rubber, 12 is the joint material,
13 and 13' are reinforcing steel bars, and 14 and 14' are pavement layers.

Claims (1)

[Scope of utility model registration request] A plurality of box-shaped frames made of a metal material are positioned at each of the opposite ends of the floor slab so as to protrude in the direction of the gap, and the ends of the plurality of box-shaped frames located at one end of the floor slab and the other floor are arranged. The ends of the plurality of box-shaped frames located at the end of the slab are positioned so that they appear alternately in the gap, and at the end of each floor slab, adjacent box-shaped frames are made of a plate made of metal material. An expansion joint device characterized by being connected by.