JPS5844810B2 - 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 is a weir with a flexible membrane, such as a bag made of rubberized cloth, attached to at least the riverbed in the direction across the river, and an inlet and exhaust pipe communicating with the inside of the weir. (Water) A fluid such as air, water, or both is sent from a pipe to cause the pipe to expand and stand up, or discharge the fluid from the inside of the envelope to cause the pipe to contract and fall down. (see issue).

In this type of undulating weir, it is known to provide a cushioning material inside the sheath and at the bottom of the sheath in order to prevent the sheath from being damaged by boulders and the like that flow down with the water when the weir collapses.

FIG. 1 shows a conventional undulating weir made of a flexible membrane, 9IJ, equipped with the above-mentioned buffer material (see, for example, Japanese Patent Publication No. 53-23021).

In Fig. 1, 1 is a flexible membrane envelope, 2 is a river bed, and 3 is a flexible membrane envelope.
, 3" is a cushioning material, 4.4" is a bag for fixing the cushioning material, 5 is upstream water, 6 is an inlet/exhaust (water) pipe, 7 is an upstream cover mounting part,
Reference numeral 8 indicates a downstream cover mounting portion, 10 indicates a sealing sheet, solid lines indicate when the weir is inflated and raised, and imaginary lines indicate when the weir is contracted and collapsed.

In the above case, when the envelope is contracted when the water level on the downstream side of the estuary weir is high, the shape as shown in FIG. 2 is formed due to the rigidity of the cushioning material.

If there is a flow velocity in the river in such a state, the raised part of the downstream attachment part of the envelope will act as a resistance to the flow, and as this part moves, the area near the two-fold tip 9 of the envelope will touch the river bed surface. This may cause friction and wear damage.

The present invention has been studied in view of this point, and will be described in detail below with reference to illustrative drawings.

Figures 3 and 4 are views of the undulating weir of the present invention taken along the river flow direction, with Figure 3 showing the weir when it is erected, and Figure 4 when the weir is falling down.

1 is a cover made of a flexible membrane, for example rubberized cloth; 2 is a riverbed; 3.
3' is a cushioning material such as foamed polyethylene, 4 and 4' are bags for fixing the cushioning material, such as rubberized cloth bags, 6 is an inlet/exhaust (water) pipe, 5 is upstream water, 7 and 8 are upstream and downstream cover attachments. Section 10 indicates a seal sheet.

That is, in the present invention, a cushioning material is provided on the floor between the attachments of the envelope in the flow direction and in the floor area where the envelope is placed downstream from the downstream attachment position of the envelope when the envelope contracts. There is no cushioning material inside the envelope.

Therefore, even if the sheath is contracted when there is a water level downstream of the weir, the sheath near the attachment on the downstream side will only be bent, creating no resistance to the flow, and the area near the two-fold tip 9 of the sheath will not sway. First, there is no wear and tear on the envelope as mentioned at the beginning.

In addition, there is high specific gravity material 11°11 inside or on the sides of the cushioning materials 3 and 3'.
′ can prevent the cushioning material from floating up due to water.

Although the cushioning materials 3 and 3' are provided in a continuous manner in the side view for explaining the present invention, it goes without saying that they may be provided separately.

[Brief explanation of drawings]

Each of the drawings shows a flexible membrane undulating weir equipped with a cushioning material cut in the direction of river flow; Fig. 1 shows a conventional weir, and Fig. 2
The figure illustrates the drawbacks of the conventional weir, FIG. 3 shows the weir of the present invention when it is erected, and FIG. 4 shows the weir of the present invention when it is collapsed. 1... Flexible membrane envelope, 2... Riverbed, 3.3',
3"...Buffer material, 4,4.4"...Bag for fixing the buffer material, 5...Upstream water, 6...Inlet/exhaust (water) pipe, 7
... Upstream side cover attachment part, 8... Downstream side cover attachment part,
9... Near the bifold tip of the envelope, 10... Seal sheet, 11. ．． 11'...High specific gravity material.

Claims (1)

[Scope of Claims] 1. A flexible membrane envelope is attached to at least a river bed in a direction across the river, and fluid is supplied to the interior of the envelope to cause it to expand and stand up, and fluid is discharged from the interior of the envelope to cause it to contract and fall down. In weirs that are designed to An undulating weir made of a flexible membrane characterized by having a cushioning material arranged in the part. 2. The flexible membrane undulating weir according to claim 1, which has a high specific gravity material inside the provided cushioning material. 3. The flexible membrane undulation weir according to claim 1, which has a high specific gravity material on the side of the cushioning material provided.