JPS626003A - Repairing of expansion joint for road - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for repairing expansion joints for roads, and more specifically, a method for reusing a part of an existing expansion joint as is when repairing a road pavement surface by surface cutting. This provides a method for shortening the time required for repair work.

[Conventional technology]

Conventionally, expansion joints have been used at joints of paved roads on road bridges and bridges such as viaducts in order to absorb the expansion and contraction of bridges caused by seasonal temperature changes.

This road expansion joint (hereinafter referred to as "joint") will be explained with reference to the drawings. As shown in FIG. become.

This joint 11 is constructed by inserting a back-up material l into the gap 5 of the box cut-out part on the joint part of the girder plate 12 with the interposition of the floor plate 4.
and hot melt rubber-based hot melt binder 2
is heated and melted to plug it, then aggregate 3 of the same particle size is laid down, and the true melt binder 2 heated and melted is again heated and injected into the aggregate 3.

If the surface of the paved surface 3 is damaged by vehicle spikes, grazes, etc., or if ruts become an obstacle to vehicle travel, only the surface of the paved surface 3 must be repaired.

Generally, in such repair work of the paved surface 3, it is desirable to carefully cut the surface of the paved surface 3 of the road with a cutting machine, including the joint 11, but it takes a long time to restore the joint 11. For this reason, a method is adopted in which the work is performed by leaving as much of the joint 11 as possible.

In addition, if the paved surface and the joint 11 are cut at the same time, this joint 11 needs to be newly formed in the same process as when newly installed. Although it is necessary to remove the true melt binder 2 and the bottom plate 4 that are adhered to the substrate, this removal work was difficult.

As mentioned above, in conventional road pavement surface 3 repair work, the existing joint 11 is completely removed and then restored using the same process as the newly installed joint 11.
There was a problem that the work could not be completed within the regulated time for renovation work.

In addition, in a repair method in which the surface of the paved surface 3 is cut together with the surface of the joint 11, and then a new paved surface 3 is formed on that surface, the new paved surface 3 is integrated with the boundary surface of the existing joint 11 that remains. Therefore, when the pavement surface is renovated, the existing joint 11 cannot be reused.

[Purpose of the invention]

The present invention has been made in order to solve the above-mentioned problems when repairing the conventional paved road, and it is possible to repair the joint part in a short time and easily when repairing the road pavement, thereby reducing the repair work time. The purpose is to shorten the time.

[Summary of the invention]

To achieve the above object, the present invention includes a first step of cutting the surface of the expansion joint at the same time as cutting the surface of the pavement when repairing road pavement that has been continuously laid through expansion joints; A second step of laying a separate material on the cut surface of the expansion joint exposed in the process, a third step of applying new surface paving to all the cut surfaces including the expansion joint, and a new surface paving on the upper part of the separate material. The fourth step is to remove the surface paving and separate material to expose the cut surface of the expansion joint, and the fifth step is to fill the cut surface of the expansion joint with a new expansion joint member. It is something.

(Example) Next, an example of the method for repairing a road expansion joint of the present invention will be described with reference to the drawings.

First, as shown in Fig. 1, in the repair work of the road pavement surface 3 that has been laid continuously via the joint 11, as the "first step", the pavement surface 3 is constructed as shown in Fig. 2. The surface and the surface of the joint 11 are cut and removed at the same time, and in this case, the cutting is generally done to a thickness of 30 to 60 m.

Next, as a "second step", as shown in FIG. 2, a separate material 10 is laid on the cut surface of the exposed joint 11 cut in the first step.

This separate material 10 is a joint 11 after pavement renovation.
This is to prevent the boundaries between the members and the paving material from becoming one and mixing, and to allow them to be easily separated when removing the paving material.

The separate material 10 may be a surface paving material such as a thin plate, an iron plate, a dense mesh wire mesh, a combination of wire mesh and cloth, a plywood board, or a heat-resistant hemp sheet, cotton cloth, carbon cloth, glass cloth, etc. Choose something that is unfamiliar.

Furthermore, as a "third step", a new paved surface 3A is applied to the cut surface formed in the first step of the paved surface 3, including the joint 11 where the separate material 10 is laid, as shown in FIG.

Next, as a "fourth step", the new surface paved surface 3A above the separate material 10 and the separate material 10 of the surface paved surface 3A are removed as shown in FIG. in this case,
The surface paving layer 3A is easily separated and removed without mixing with the surface paving surface 3A and the lower layer forming the existing joint separated by the separating material 10.

Furthermore, as a "fifth step", the surface of the existing joint 11 is heated with hot air at 100 ° C. or higher to melt the surface, and then aggregate 3 of the same particle size is heated to, for example, 100 ° C. or higher and laid, The repair work is completed by injecting and filling the hot melt binder 2 heated and melted at, for example, 170° C. to 190° C. and integrating it with the existing joint 11.

〔Effect of the invention〕

In the road expansion joint repair method of the present invention, which is comprised of the above series of steps, the joint can be cut along with the pavement surface without worrying about the location of the joint during the repair work. This has the effect that pavement cutting can be carried out easily and in a short time.

In addition, the existing joint can be covered with a separate material.
Since the new surface paving is performed in a separated state, the new surface paving on the upper part of the joint and the existing joint members do not mix together, so it is easy to remove the surface paving on the joint, and it is easy to remove the surface paving on the existing joint. Since no paving material is mixed in, a normal joint effect can be maintained.

Furthermore, since the back-up materials, floor plates, and some joint members of the existing joint can be used as they are, the renovation work can be carried out easily and the work can be shortened, which has the effect of reducing the cost of the construction work.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a main part of a road pavement joint part to be repaired by applying the repair method of the present invention. Figures 2, 3, 4, 5, and 6 are a series of cross-sectional views of main parts showing each step of the repair work for the joint part of the road pavement in Figure 1; 3 shows the first step, FIG. 3 shows the second step, FIG. 4 shows the third step, FIG. 5 shows the fourth step, and FIG. 6 shows the fifth step. 10...Separate material, 11...Expansion joint (joint), 13...Paving, 13A...Surface pavement.

Claims (1)

[Claims] When repairing road pavement that has been continuously laid through expansion joints, a first step of cutting the surface of the expansion joint at the same time as cutting the surface of the pavement, and cutting the surface of the expansion joint exposed in the above step. A second step of laying a separate material, a third step of applying new surface paving to all cut surfaces including the expansion joint, and a new surface paving on the upper part of the separate material and removing the separate material to install the expansion joint. A method for repairing a road expansion joint, comprising: a fourth step of exposing the cut surface portion of the expansion joint; and a fifth step of filling the cut surface portion of the expansion joint with a new expansion joint member.