JPS6365762B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for installing a pipe body for an automatic train control system (ATC) on a track girder for a straddle type monorail.

When installing ATC piping on the track girder of a straddle type monorail, place the hard PVC pipe body for ATC in the groove provided at the top corner of the girder.
The tube holding member was welded to the steel girder and mortar was placed in the remaining space in the groove, but this method had the following drawbacks.

In other words, as a result of placing and fixing the tube at the corner,
In order to prevent air bubbles from remaining between the pipe body and the mortar when placing the mortar, once the mortar has been placed, mortar has to be placed again to finish the pipe. However, the work had to be done at heights twice, which increased the risk and cost.

In addition, steel tracks expand and contract repeatedly due to cold and heat, and conventional mortar cannot adequately keep up with this.
Furthermore, as a result of being unable to follow the deflection of the track due to the weight of the monorail, cracks appeared in the mortar and gaps formed between the track and the track girder.

The object of the present invention is to solve these problems, to perform mortar pouring in one step, and to be able to follow the expansion, contraction, and deflection of the steel raceway.

In order to solve this technical problem, in the present invention,
ATC installed on track girder for straddle type monorail
When installing the pipes, place the cylinders at appropriate intervals along the grooves formed in the upper corners of the girders, and place the supports fixed on the cylinders facing into the grooves. After connecting and fixing the ATC tube body to the cylinder body, formwork is placed and fixed on the side of the girder to form an air vent between the tube body and the formwork, and resin mortar is poured into the groove from above. The technical means is to cast the concrete and finish the top surface lower than the top surface of the girder.

According to this technical means, air bubbles generated during casting of resin mortar escape not only from the upper part of the groove but also from between the pipe body and the formwork, so that air bubbles do not accumulate around the pipe body. Therefore, the surface can be finished using a trowel in the same state after casting.

Resin mortar has good adhesion to steel girders,
The ability to sufficiently follow the deflection and expansion/contraction of the girders, and the fact that the supports are connected and fixed to the girders at appropriate intervals, together help the resin mortar's following action.

In addition, the ATC pipe body can be placed as far away from the girder body as possible by the support, and a sufficient amount of resin mortar is placed between it and the girder body.
This means there is no need to worry about noise entering the ATC signal.

Next, embodiments of the present invention will be described using the drawings.

Concave grooves 2, 2 are formed at the upper corners of the track girder 1 over the entire length, and the ATC pipe bodies 3, 3 are
The piping must be located exactly at the corner of the track girder 1 (see Figure 1).

First, in the groove 2, the girder 1 is subjected to anti-rust treatment and a primer treatment is applied to improve the adhesion of the cast resin mortar to the girder 1.

Next, the cylinder holding the tube 3 is placed along the opening of the groove 2 so as to be located at the corner of the girder 1. This cylindrical body 4 is always positioned at a constant distance from the girder 1 using, for example, the mounting aid 6 shown in FIG. The lower end is welded to the girder 1.

Next, after the tubular body 3 is inserted into the cylindrical body 4 and held therein, a formwork 10 is placed on the side surface of the girder 1, and this is fixed using the fixing angle 11 and the butter angle 12. At this time, the formwork 10, the tube body 3, and the tube body 4
(See Figure 3).

After preparing in this way, an epoxy resin mortar 13 is cast into the groove 2 from the upper opening thereof, and after degassing with a vibrator (not shown), the upper surface of the mortar 13 and the pipe body 3 are removed using an appropriate trowel. The space between the mold and the mold 10 is finished, and after curing, the mold is removed and the work is completed.

In this example, epoxy resin mortar is used which is suitable for adhesion to the girder and ability to follow the expansion, contraction and deflection of the girder, but other resin mortar may be used as long as the adhesion and followability are sufficient. You may also use

In the above embodiment, the support also has a function to help prevent slipping, but studs (not shown) are installed in advance in the grooves to strengthen the anti-slip function against the resin mortar. Also good. In this case, the lower end of the support may be fixed to the stud and indirectly fixed to the girder.

[Brief explanation of drawings]

The drawings show embodiments of the present invention.
The figure is a longitudinal cross-sectional view of the girder in the finished state, FIG. 2 is a longitudinal cross-sectional view of the girder when a cylinder is attached, and FIG. 3 is a longitudinal cross-sectional view of the girder with formwork etc. assembled. 1...Girder, 2...Concave groove, 3...Pipe body, 13...
resin mortar.

Claims (1)

[Claims] 1. Cylindrical bodies with fixed supports are arranged at appropriate intervals along the openings of grooves formed at the corners of the laid track girder for a straddle type monorail. After connecting and fixing the support to the girder in the groove and holding the tube body in the cylinder, formwork is placed and fixed on the side of the girder to form an air vent between the tube body and the formwork, and the groove A method for laying a pipe body for automatic train control equipment, characterized by casting resin mortar inside and finishing the top surface lower than the top surface of the girder. 2. The laying method according to claim 1, wherein studs are planted in the groove at appropriate intervals and the support is fixed thereto.