JPS5936052B2 - Flexible membrane undulating weir - Google Patents

Description

[Detailed description of the invention] The present invention relates to a flexible membrane undulating weir.

A flexible membrane undulating weir has a flexible membrane sheath (bag-like body) that forms the weir body attached to at least the river bed in the direction across the river, and an inlet and an exhaust (water) connected to the weir inside the sheath. A fluid such as air, water, or both is sent through the tube to cause the tube to expand and stand up, or the fluid is discharged from the inside of the envelope to cause the tube to collapse (for example, Japanese Patent Publication No. 11702-1970, Japanese Patent Publication No. 11702-1971).
(Refer to No. 2371) Among these types of undulating weirs, those of the double clamp type (types with attachment parts to the riverbed on the upper and downstream sides) have a flexible membrane that forms the envelope, such as a rubber-coated main body, as shown in Figure 1. 1 and the seal sheet, that is, water, and the airtight sheet 2 maintains the water and airtightness inside the envelope, and the seal sheet 2 is kept from the soil flow water 3.
A watertight structure is provided at the attachment part so that it does not pass downstream between the riverbed concrete 4 and the riverbed concrete 4.

In FIG. 1, 5 is a buffer material, and 6 and 6' are upper and downstream clamps.

However, if there is a crack 8 in the concrete, water 7 will enter between the river bed concrete 4 and the seal sheet 20, causing the seal sheet to float as shown in FIG.

If the weir collapses in the condition shown in Figure 2, it will disturb the river cross section as shown in Figure 3.

Disturbing the riverbed cross section will cause flooding when water comes out.

Also, if the main body rubber-coated fabric is raised above the river bed, that part will be worn away by boulders, mudflow, etc.

The present invention has been studied to solve the above problems.

The invention will now be described in detail with reference to the drawings, which are illustrative, but not restrictive.

FIG. 4 illustrates a cross-sectional view of the undulating weir of the present invention.

In FIG. 4, 9 indicates a water drain port, 10 indicates an operation chamber, 11 indicates a pipeline, 12 indicates a valve, and the same reference numerals as in FIG. 1 indicate the same parts.

That is, in the present invention, at least one water drain port 9 is provided in the river bed surface at a portion where the seal sheet 2 contacts the river bed surface 4, a pipeline 11 is drawn into the operation chamber 10, and a valve 12 is attached.

If water accumulates between the seal sheet and the river bed surface and harms the river cross section when the weir collapses, the water can be drained by opening the valve in the operation chamber.

Alternatively, instead of the above, as shown in FIG. 5, a drain box 13 may be provided in the middle of the pipeline 11 and water may be drained by a pump 14.

The present invention as described above has the following advantages.

A drainage port is provided on the river bed to drain water accumulated between the seal sheet and the river bed.

Therefore, it is possible to prevent the main body rubber-coated fabric from damaging the river cross section when the weir is collapsed due to water accumulating between the seal sheet and the river bed surface.

It is possible to prevent the parts of the rubber-coated fabric raised from the river bed from being worn out by boulders, mudflow, etc. due to accumulated water.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional double-clamp type flexible membrane undulating weir taken in the river flow direction, Figure 2 is a diagram explaining the problems of the undulating weir shown in Figure 1, and Figure 3 is a cross-sectional view of a conventional double-clamp type flexible membrane undulating weir. Figure 2 is a diagram explaining the state of the weir when it collapses when the problem occurs, and Figure 4 is a diagram explaining the double clamp type one-piece flexible membrane undulating weir of the present invention, where the weir is in the river flow direction. The cutaway view and FIG. 5 each illustrate a diagram illustrating another example of the undulating weir of the present invention. 1... Flexible membrane forming the envelope, such as rubberized cloth, 2...
... Seal sheet, 3... Upstream water, 4... River bed concrete, 5... Buffer material, 6... Upstream clamp,
6'...Downstream clamp, 7...Water, 8...Crack, 9...Water drain port, 10...Operation room, 11...
・Pipeline, 12... Valve, 13... Drain box, 14... Pump.

Claims (1)

[Claims] 1. A flexible membrane envelope forming a weir body is attached to the riverbed in the upper and downstream directions in a direction across the river, and fluid is sent into the envelope to cause it to expand or to discharge fluid from inside the envelope. An undulating weir made of a flexible membrane characterized by having at least one drainage port provided on the riverbed surface in contact with water and an airtight sheet in a deflated defecation system.