JPS58181911A - Repairing of flexible film dam - Google Patents

Abstract

PURPOSE:To perform effectively the exact repairing of a flexible film dam hardly to be rebroken by a simple method in which the film dam is risen by charging it with air, portions to be repaired are checked from outside, and the repairing work is made from the inner wall side of the film dam. CONSTITUTION:In case where a rubber dam 1 is damaged X and repairing work is to be made, the risen dam is fallen by exhausting air from an air supply and discahrge port 12 to lower the water level L and also to cause presser metals 6a-6c on both ends 1A to expose. Then presser metals 6a-6c are removed, both ends 1A are opened, a workman M enters the dam 1, and the presser metals 6a-6c are clamped. Air is then continuously supplied to inflate the dam 1 in such a way as to enable the workman to perform a repairing work. Since air bubbles come out of the damaged portion X due to the leakage of air from the inside of the dam 1, the position is informed to a workman M from outside, and the workman M confirms the position, applies a puff finishing to the inner wall of the damaged portion X, coats an adhesive on the portion, and lays a repairing rubber plate 20 on the adhesive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing a damaged portion of a flexible membrane weir that is erected by air injection and collapsed by air discharge.

Flexible membranes, commonly referred to as rubber weirs, that expand or contract when air is injected or discharged are easy to install, inexpensive, and widely used for purposes such as agricultural water intake.

However, such flexible membrane weirs may be damaged by driftwood or other floating objects G, resulting in leakage of injected air. Such damage must be immediately repaired and the damaged hole closed.

Conventionally, the repair was performed using the following method.

That is, the rubber weir 03 installed across the river bed section 01 or the slope section 02 of river bed concrete is laid down to the state shown in FIG. 1, so as to surround the damaged location 04:
Build up a weir. Next, the water in the weir A f'AI is pumped out. The thus exposed damaged part 04 of the rubber dam 03 is dried, and a repair rubber weir is joined to the mouth part.

If there is a damaged part 04a on the lower wall in the collapsed state, after draining the A part of the weir in the same way as above, remove the presser foot 05 on the overlapping side edge from the slope to the river bed. Remove the rubber weir sheet, open the folded rubber weir sheet, and apply a repair rubber sheet 06 to the damaged area 04a.

When using the above method, laborious work such as loading sandbags and draining with pumps is required, and in particular, when repairing the damaged part 04a as in the latter case, the interior must be completely opened. It's an unavoidable hassle.

In addition, in the former case, that is, when repairing the damaged part 04, since the repair rubber sheet is pasted from the outer surface of the rubber ring 03, there is a disadvantage that it is easy to peel off when internal pressure is applied. When repairing the latter, that is, the damaged part 04a, since the work is done with the inside exposed, the rubber JI
Water easily entered I03.

Furthermore, when the rubber ring is laid down, the damage location is 04.0.
4 Check a and there are cases where it is strong.

The present invention has been achieved by solving the problems of the prior art, and its purpose is to perform strong repairs that are unlikely to cause re-damage with relatively simple work. be.

That is, in the present invention, when the flexible membrane weir is in the upright state,
It is characterized by detecting the repair point from the outside and performing the repair from the inner wall side of the membrane weir.In the upright state, internal air is generated as bubbles at the repair point, making it easy to detect the inside. If repairs are carried out from the inner wall side in an upright position, air escapes from the damaged part to the outside, making it easier to apply the repair sort, and when repaired from the outside, it has higher pressure resistance and is less likely to peel off.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 10.

Reference numeral 1 denotes a rubber ring which is a type of flexible membrane weir, and the rubber weir 1 has a shape in which two rubber rings 2.3 are stacked on top of each other, and the upper and lower parts are integrally joined at the outer edge 4. At the overlapping side edge 5, tighten the anchor bolt 7 and nut 8G,
It is fixed to riverbed concrete 10 via a presser foot 6.

In addition, at both longitudinal ends IA of the rubber 14 deaf 1 corresponding to the slope 11 of the riverbed conc IJ-) 10, the overlapping side edges 5A are cut diagonally toward the outer edge 4A of the rubber weir 1. It has a rounded shape.

When the rubber ring 1 is damaged and repaired, the rubber ring 1 is brought down from the upright position shown in step 31 by being evacuated through the air supply and exhaust hole 12, and the water level is lowered to the level shown in Fig. 5. The presser feet 6as5b and 5c at both ends IA are exposed.

Next, remove the presser feet 5a, 6b, 6c and press both ends IA.
is opened and worker M enters into the rubber weir.

During this time, air continues to be supplied into the rubber weir 1 through the supply and exhaust holes 12, and after the worker M enters, presser feet 6a, 5b, 5c
(See Figure 6).

After tightening, if air is supplied again, the rubber ring 1 will be raised up, making it possible to work inside the rubber weir 1 (see FIG. 7).

At the damaged part Let me know.

After confirming the position, worker M inspects the inner wall of the damaged part
Remove the buff, apply adhesive, and repair rubber plate 20.
Paste. At this time, since air is released to the outside at the damaged part X, it is easy to attach the rubber plate 20 (see No. 81).

Note that if the drain pipe 13 is opened and air is continued to be supplied during the work, the interior will be ventilated and the work can be performed in a comfortable condition.

After the repair work is thus completed, worker M waits near the slope, partially collapses the rubber 1111 into a V-notch shape, lowers the upstream water level (see Fig. 9), and lowers the presser foot 6a. %6b
Remove %f3c and go outside (see Figure 10).

As described above, the repair work can be performed without any contact with water, and since the repair rubber plate 20 is attached while the inner wall surface of the rubber ring 1 is dry, the joint is perfect and , compared to the case where the repair rubber temporary title is pasted on the exterior wall side.
It has high strength against internal pressure and is difficult to peel off.

In addition, if the shape of both ends IA of the rubber ring 1 is made into a rectangular shape as shown in FIG. 11, or if a zipper F that can be opened and closed is provided at the upper part of both ends IA as shown in FIG. Workers can easily enter the rubber illumination, improving work efficiency. In addition, as shown in Figure 13, the river bed
It is effective for safety if an evacuation hole 11A for the worker to enter is provided in the bottom part 11 of 1.

It is also possible to provide a protrusion on the inner wall surface of the rubber weir 1, and when repair is required, an automatic repair device can be installed inside and run along the protrusion to carry out the repair.

[Brief explanation of the drawing]

The first one is an explanatory diagram showing a conventionally known rubber weir repair method, and the second one is an explanatory diagram showing a conventionally known rubber weir repair method.
Figure 3 is an explanatory diagram showing the repair mode, Figure 3 is a longitudinal cross-sectional side view of the rubber band to which the present invention is applied in the upright state, Figure 4 is an explanatory diagram showing the same collapsed state, and Figure 5 is the water level in the same collapsed state. The 61st chrysanthemum is an explanatory diagram showing the state in which the worker enters the rubber layer. Figure 7 is the explanatory diagram showing the state in which the worker enters the rubber layer and stands up the rubber rod. Figure 8 is an explanatory diagram showing the working state, Figures 9 and 10 are explanatory diagrams when the worker escapes to the outside after finishing the work, and Figures 11 to 13 are
The figures are explanatory diagrams showing a state in which a rubber weir is installed, which facilitates the implementation of the present invention. 1.-Rubber weir, 1A...both ends, 2.3 - Rubber weir h4...outer edge, 4A...outer edge, 5...
Overlapping side edge, 5A: Overlapping side edge, 6: Presser foot, 6a16b%6Q: Presser foot, 7: Anchor bolt, 8: Nut, IO: River bed concrete IJ -) 1. +1... Hobu, 1
1A...Escape hole, 12...Intake/exhaust hole, 13...Drain pipe, 20...Rubber plate for repair, F...Zipper, L/Water level, M...Worker, X-
°Damaged part. Agent: Patent Attorney Nozomi Ehara

Claims (1)

[Claims] When repairing a damaged part of a flexible membrane weir that crosses a river and is fixed to the river bed in the form of a cylindrical body, the cylindrical body is sealed at both ends, the flexible membrane weir is erected by injecting air. A method for repairing a flexible membrane weir, characterized in that when the condition is present, a repair point is detected from the outside, and the repair is performed from the inner wall side of the flexible membrane weir.