JPH1096224A - Flexible membrane fixed device of flexible membrane weir - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new fixed device capable of ensuring more certain sealing efficiency and facilitating construction without variation. SOLUTION: A flexible membrane weir 12 fixes a flexible membrane 14 to a riverbed section 10 with first stud-bolt 16A, first hold-down metal fixture 22A and first bracket 20A to form a closed bag-shaped body. The first stud-bolt 16A passes through the flexible membrane 14 in the inside and/or the outside of the bag-shaped body, and the flexible membrane 14 is held in an air- and water tight state between the first bracket 20A along the longitudinal direction of the flexible membrane 14 and the membrane weir 12 by screwing the first stud-bolt 16A in a first nut 18A. In a flexible membrane weir fixed device of the flexible membrane weir, a sealing member 24 is provided along the longitudinal direction of the flexible membrane 14 between the flexible membrane 14 and first bracket 20A and, at the same time, a part of the sealing member 24 is extended and is fixed to the iverbed section 10 with second stud-bolt 16B, second hold-down metal fixture 22B and second bracket 20B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is laid across a river, fixed to a riverbed with both side edges of a flexible membrane apart, raised by supply of air or / and water, and laid down by discharge. The present invention relates to a flexible membrane weir formed of a flexible membrane, and more particularly to a flexible membrane weir laid at a location where the water depth is downstream.

[0002]

2. Description of the Related Art Flexible membrane weirs, generally called rubber weirs,
The construction is simple, the production cost is low, and it is widely used as intake of agricultural water and as a tide barrier at river mouths. In such a flexible membrane weir, a long flexible membrane (made of rubber or soft resin)
One of the edges is downstream and the other end is upstream and both ends are separated by a straight line pointing in the river width direction and fixed in two rows on the riverbed surface To form a closed bag.

[0003]

FIG. 5 shows a two-row fixed type flexible membrane weir 02 laid on riverbed concrete 01.
Is shown as a longitudinal sectional view, and the flexible membrane 03 of the flexible membrane weir 02 is fixed to the riverbed concrete 01 in the row A on the upstream side and the row B in the downstream side. FIG. 6 shows a fixing relation in the row B. In a state where the studs 04 penetrate the flexible membrane 03, the studs 04 and the nuts 0 through the washers 09 are disposed.
5, the flexible film 03 is sandwiched between the receiving fitting 06 and the holding fitting 07. In such a structure, the top of the planting bolt 04 is exposed in the river, and the water of the river flows toward the riverbed concrete 01 through the thread groove of the planting bolt 04 and flows into the inner chamber of the flexible membrane 03. In order to prevent this, a silicone oil resin-based sealing member 08 is filled and applied to the receiving metal fittings 06 and the gap between the flexible film 03 and the studs 04 to maintain the airtightness. I have. However, over a long period of time, the nut 05 and the presser fitting 0
As a result, "play" occurs in the fixing portion of the flexible film 03, and a gap is formed in the sealing material 08 to reduce the airtightness. Further, when the mounting portion together with the receiving fitting 06 is partially separated from the riverbed concrete 01 due to the large tension, the generated gap makes the inner room 03A of the flexible membrane communicate with the river flow F. And the airtightness is lost.

[0004] It is an object of the present invention to provide a novel flexible membrane fixing structure which is easy to apply, has no variation, and thus ensures more reliable sealing.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention has the following constitution. According to the first aspect of the present invention, there is provided a flexible membrane fixing device for a flexible membrane weir having a first planting bolt, a first holding member, and a first receiving member, the flexible membrane being provided on a riverbed. And a flexible bag dam forming a closed bag-like body, wherein the first planting bolt penetrates the flexible membrane inside and / or outside the bag-like body, A flexible membrane having a structure in which the flexible membrane is air-tightly sandwiched between a first receiving member along a longitudinal direction of the flexible membrane by screwing the first planting bolt and the first nut. In the weir, a sealing member is interposed along the longitudinal direction of the flexible film between the flexible film and the first receiving member, and a part of the sealing member is extended to form a second member. The planting bolt, the second holding member, and the second receiving member are fixed to the riverbed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment shown in FIGS. 1 to 6 will be described below.

FIG. 1 is a vertical sectional side view of a double-row fixed type flexible membrane weir 12 laid on a riverbed concrete 10, and the flexible membrane (rubber) of the flexible membrane weir 12 is shown in FIG. (Or made of soft resin) 14 is fixed to the riverbed concrete 10 in row A on the upstream side and row B on the downstream side. The fixing structure in the row B is shown in FIG. 2, and the end of the flexible membrane 14 is held by a screw fitting of an L-shaped planting bolt 16A integrated with the riverbed concrete 10 and a nut 18A via a washer 19A. Sealing member (made of chloroprene rubber or ethylene propylene terpolymer) that hermetically seals the gap between 22A
24 is positioned below the flexible membrane 14, and is firmly sandwiched between the receiving fitting 20A and the holding fitting 22A together with the nut 28, and is fixed to the riverbed concrete 10.

Further, one end of the sealing member 24 extends toward the inner chamber 14A of the flexible membrane, and includes an L-shaped planting bolt 16B integrated with the riverbed concrete 10, a receiving fitting 20B and The nut 18B is fixed to the riverbed concrete 10 by being screwed into the nut 18B via the presser fitting 22B.

Hereinafter, the operation of the present invention will be described.
According to such a fixing structure of the rows A or B located on the riverbed concrete of the flexible membrane 14, the flexible membrane 14 expands and stands by the supply of the fluid (air and / or water) to the inner chamber 14A. At times, when the tension acting on the flexible membrane due to its own buoyancy or the load of the river flow F is extremely large, the mounting portion of the flexible membrane 14 is lifted together with the receiving fitting 22A from the riverbed concrete to the river flow side. In some cases, a gap may be formed between the riverbed concrete and the receiving fitting 20A by separating from the riverbed concrete. Such a gap makes the inner chamber of the flexible membrane communicate with the river flow, and the airtightness is lost. However, as described above, since the sealing member 24 is fixed to the riverbed concrete 10 together with the flexible film 14, and the end of the sealing member 24 is further fixed to the riverbed concrete 10, the riverbed concrete 10 and the receiving metal fitting are fixed. Even if a gap is formed between the flexible film 20A and the inner wall of the flexible film 14, the inner space of the flexible film can be maintained airtight without being affected by the tension of the flexible film 14.

FIG. 3 shows another embodiment of the present invention in which one end of the sealing member 24 extends to the outside of the flexible membrane (the river flow F side) and is attached to the riverbed concrete 10. FIG. 4 shows one end of the sealing member 24 as a flexible membrane inner chamber 14.
This is another embodiment of the present invention, which is attached to the riverbed concrete 10 so as to extend both on the A side and the outside (the river flow F side).
In this configuration, the same effect as in the first embodiment is achieved.

FIG. 5 is a cross-sectional view of the riverbed concrete 10 with one end of the sealing member 24 extending to the inside 14A of the flexible membrane.
To the flexible membrane inner chamber 1
Weave to 4A side, and L integrated with riverbed concrete 10
A row B fixing portion fixed to the riverbed concrete 10 by being fastened to the riverbed concrete 10 by being screwed with the nut 18B via the V-shaped planting bolt 16B, the receiving member 20B and the holding member 22B is provided on the flexible membrane inner chamber 14A side. Is another embodiment of the present invention,

FIG. 6 shows another embodiment of the present invention in which one end of the sealing member 24 is extended to the inner room 14A outside the flexible membrane (the river flow F side) and attached to the riverbed concrete 10. It is an example. In this configuration, the same effect as in the first embodiment is achieved.

[0012]

The present invention has the above-described structure,
It is possible to provide a novel flexible membrane fixing structure that is easy to perform, has no variation, and thus ensures more secure sealing.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a flexible membrane weir employing a flexible membrane fixing structure according to one embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG. 1 showing the fixing structure.

FIG. 3 is an enlarged view of a main part corresponding to FIG. 2 and showing a modification.

FIG. 4 is an enlarged view of a main part corresponding to FIG. 2 and showing a modification.

FIG. 5 is an enlarged view of a main part corresponding to FIG. 2 and showing a modification.

FIG. 6 is an enlarged view of a main part corresponding to FIG. 2 and showing a modification.

FIG. 7 is a longitudinal sectional side view of a known flexible membrane weir.

FIG. 8 is an enlarged sectional view showing the flexible film fixing structure in FIG. 7;

[Explanation of symbols]

 01, 10 Riverbed concrete 02, 12 Flexible membrane weir 03, 14 Flexible membrane 03A, 14A Inner chamber 04, 16A, 16B Stud bolt 05, 18A, 18B, 28 Nut 06, 20A, 20B Receiving bracket 07, 22A, 22B Presser bracket 08, 24 Sealing member 09, 19A Washer F River flow

Claims (1)

[Claims] 1. A flexible membrane weir that forms a closed bag by fixing a flexible membrane to a riverbed with a first stud, a first holding metal, and a first receiving metal. The first stud bolt penetrates the flexible membrane inside and / or outside the bag-like body, and the first stud bolt and the first nut are screwed together to form a flexible member. In a flexible membrane weir having a structure in which a flexible film is sandwiched between the flexible film and a first receiving member along a longitudinal direction of the film, a seal is provided between the flexible film and the first receiving member. A member is interposed along the lengthwise direction of the flexible membrane, and a part of the sealing member is extended to the riverbed with the second planting bolt, the second holding member, and the second receiving member. A flexible membrane weir fixing device for a flexible membrane weir, which is fixed.