JPH0348281B2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Application Field) The present invention is useful for replacing and repairing bridge expansion joint devices installed on road bridges, etc., and for breaking the back-filling part of back-filling concrete, etc. Concerning a certain backfill crushing method.

(Prior Art) Expansion joint devices on road bridges have become increasingly important to maintain, manage, maintain, and repair due to the recent increase in traffic volume and the problem of ensuring vehicle drivability and comfort.

Among these, when for some reason it is necessary to replace or repair a bridge expansion joint device installed on a road bridge, etc., one of the tasks is to destroy the backfilling part of backfilling concrete, etc.

The most common way to do this breaking work is to smash the back-filling part with a 30kg to 40kg breaker.

(Problems to be Solved by the Invention) However, this method is a source of considerable noise and poses a noise pollution problem to local residents. As a result, construction work that is accompanied by construction noise is extremely difficult.

In view of these circumstances, the present invention attempts to solve these problems by making a new proposal.

[Structure of the invention]

(Means for Solving the Problems) The present invention has its constituent elements, such as making vertical incisions in the width direction of the boundary between each backing part and the pavement at the end of the floor slab facing each other with a gap in between. Parts of the lining parts facing each other with the play space in between are destroyed, horizontal cuts are made in the width direction of both ends of the back cut part from the play space, and a plurality of seri arrows are drilled from the top to the bottom of the back cut part. An attempt is made to solve the above-mentioned problems by using a construction method for cutting the backing part of an expansion joint device, which is characterized by inserting a cutting arrow into the driving hole and destroying and crushing the backing part by expanding the arrow. It is something to do.

(Function) In this configuration, the present invention has a notch in the vertical direction at the boundary between the backing part and the pavement, and also a notch in the horizontal direction in the backing part, so that the auction arrow can be inserted through the auction arrow insertion hole. By doing this and expanding the warp arrows, it is possible to prevent corner chipping at the end of the deck slab and to easily destroy the backfilling part with low noise.

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

First, in FIG. 1, a cut 5 is vertically made at the boundary between the backing part 3 and the pavement 4 of the floor slab end part 2 facing each other with the play space 1 in between. This cut 5 is made in almost the entire area in the road width direction. In this example,
The cut is about 75mm deep.

Next, in FIG. 2, after removing the expansion joint 9, the backfilling part 3 at one end 11 in the road width direction is scooped out with the clearance 1 in between. Depth 150 in this example
It is about mm.

After that, the cutter 6 of the horizontal cutting machine is positioned at the depth position that has been scooped out, and while moving the cutter 6 of the horizontal cutting machine in the direction of the road width, the clearance is cut into the back-filling part 3 opposite to the clearance 1. Make a horizontal cut 7 from the 1st side.

Next, as shown in FIG. 3, a plurality of paring arrow driving holes 8 are bored from the top to the bottom in the floor slab end backfilling parts 3 facing each other with a play space in between. In this example, use a jack hammer etc. to φ32mm and depth.
The hole is drilled to approximately 150mm.

Thereafter, a cracker whose tip is a hydraulic paring arrow is inserted into the paring arrow driving hole 8, and the hydraulic paring arrow is expanded to crush the backing part 3. The back-filling portion that remains after the Kratzker crushing is finished by using a chipper.

Thus, the work of breaking the back-filling portion of the expansion joint device is performed.

In addition, FIG. 5 shows an example of a horizontal cutting machine, and 6 is a cutter for making a cut in the opposing back-cutting part.

〔Effect of the invention〕

The present invention is constructed as described above and has the following effects.

Vertical cuts at the boundary between the backfill and the pavement.
In addition, a notch is also made in the horizontal direction of the backing part by the play side, and the paring arrows are expanded by inserting them into the paring arrow insertion holes drilled from the top to the bottom of the backing part. The notch prevents corner chipping at the edge of the floor slab, and
Due to the expansion of the arrows, the backfilling part is easily destroyed with low noise.

Therefore, this method does not generate the noise that occurs in the conventional method of breaking the backing material with a breaker.

Therefore, it is possible to prevent noise pollution during the conventional work of replacing the expansion joint device or breaking down the backfilling portion during repair work.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view showing the opposite ends of the floor slab and the expansion joint device, Figs. 2, 3, and 4 show the relationship between the cross section and the plane after the expansion joint has been removed; A schematic diagram showing the damaged parts of the back-filling parts facing each other across the clearance, Figure 3 is a schematic diagram showing the position of the cutter of the horizontal cutting machine, Figure 4 is a schematic diagram showing the holes for driving arrows, FIG. 5 is a schematic diagram showing an example of a horizontal cutting machine. In the figure, 1 is a free space, 2 is an edge of the deck slab, 3 is a backing part, 4 is a pavement, 5 is a vertical cut, 6 is a cutter, 7 is a horizontal cut, 8 is a paring arrow driving hole, 9 is an expansion joint, 10 is an anchor, 1
1 is one end portion which is a cutting portion for a horizontal cutter.

Claims (1)

[Claims] 1. Make a vertical cut in the width direction of each backing part of the edge of the floor slab facing each other across the clearance gap and the boundary between the pavement, and destroy a part of the backing part facing each other with the clearance space in between. , make horizontal cuts in the width direction of both ends of the backing part from the free space, and inserting auction arrows into the multiple arrow driving holes drilled from the top to the bottom of the backing part, and by expanding the auction arrows, the backing part A construction method for scooping out the back-filling part of an expansion joint device, which is characterized by destroying and scooping out.