JP2000104238A - Fixing structure for roof weir made of flexible film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve water tightness in a fixing part of a roof weir made of a flexible film. SOLUTION: A plurality of projections opposed to each other are arranged on a receiving metal fitting 6 and a pressure metal fitting 7 to which an anchor bolt 9 is penetrated, and which are fixed to a riber bed by a fastening nut 15, and an overlapping part of a flexible film 1 is narrowly pressed by those projections 16. A lot of the projections 16 are arranged to a downstream side from an upstream side of the anchor bolt 9 to push the flexible film 1 against tensile force acted on the flexible film 1 at the downstream side of the anchor bolt 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a flexible membrane undulating weir, which is laid across a river, undulates by supplying and discharging a fluid such as air or water to adjust a discharge rate, to a riverbed. Things.

[0002]

2. Description of the Related Art In order to fix this kind of undulating weir to a riverbed,
As shown in FIG. 4, both ends of the flexible film 20 are overlapped and directed to the upstream side, and the receiving metal 21 and the holding metal 2 in the river width direction are provided.
2 and a fastening nut 24 is screwed into an anchor bolt 23 passing therethrough.

In the example shown in FIG. 1, a ridge 25 is provided on the upper surface of the receiving member 21 and one ridge 25 is provided on the lower surface of the holding member 22 with the groove 26 facing each other with the penetrating portion of the anchor bolt 23 interposed therebetween. The watertightness is enhanced by folding the overlapping portion of the flexible film 20 along the line.

[0004]

By the way, in the case of a large-scale undulating weir, flexible membranes are connected in the river width direction, but such flexible membranes are not uniform in thickness. In the fixing structure as described above, a gap may be formed near the joint of the flexible membrane, and water leakage may occur.

Accordingly, an object of the present invention is to provide a fixing structure for a flexible membrane undulation weir having excellent watertightness.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a plurality of projections opposed to a receiving metal fitting and a holding metal fitting to which an anchor bolt penetrates and is fixed to a riverbed with a fastening nut. The ridges are provided, and these overlapping ridges press the overlapping portion of the flexible membrane.

By arranging a large number of the ridges on the downstream side of the upstream side of the anchor bolts, the flexible membranes can be pressed against the tensile force acting on the flexible membrane on the downstream side of the anchor bolts in a well-balanced manner. Can be.

Further, a level adjusting nut is screwed into the anchor bolt, a seal washer, a water stopping metal, and a packing are sequentially interposed between the nut and the receiving metal, and a gap between the holding metal and the tightening nut is provided. When a seal washer is interposed in the seal, the watertightness is further improved.

[0009] Further, if projections which are located on the upper surface of the presser fitting on the upstream side and the downstream side of the tightening nut and are taller than the tightening nut are provided, the tightening nut or the anchor bolt due to the collision of a rock or the like can be provided. Damage is prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, an undulating weir A is obtained by folding a long flexible membrane 1 in which a cloth is impregnated with rubber, and overlapping both ends thereof to form an upstream. It is formed in a bag shape by being sandwiched by the fixture 2 toward the side, and is laid so as to be in close contact with the riverbed 3 on which the concrete has been poured and the bank slope 4.

A blower B is connected to one end of the up-and-down weir A through a supply / exhaust pipe 5. When the air pressure in the up-and-down weir A is increased or decreased by operating the blower B and operating a valve (not shown), The weir A is raised and lowered, and the discharge rate of the river is adjusted.

The fixing device 2 includes a receiving metal member 6 and a holding metal member 7, and is fixed to the riverbed 3 with a structure as shown in FIG. At the time of fixing, first, a base 8 is fixedly provided on the riverbed 3, and an anchor bolt 9 is fixed to the base 8. Then, a level adjusting nut 10 is screwed into the anchor bolt 9, and after adjusting the level, a seal washer 11, a water stop fitting 12 and a packing 13 are sequentially fitted to the anchor bolt 9,
Furthermore, the receiving fitting 6 is fitted and concrete is cast, and the receiving fitting 6 is fixed to the riverbed 3. Then, anchor bolt 9
The flexible membrane 1 is overlapped on both ends thereof, and a holding member 7 is placed thereon. A seal washer 14 is fitted on an anchor bolt 9 protruding upward from the holding member 7, and the tightening nut 1
5 is screwed in with a predetermined torque.

Each of the receiving metal 6 and the holding metal 7 has two opposing ridges 1 on the upstream side of the anchor bolt 9 and two on the downstream side.
6 are provided. By pressing the overlapping portion of the flexible film 1 with these ridges 16, even if the thickness of the flexible film 1 is not uniform, a reliable watertightness can be obtained. With the arrangement, the flexible membrane 1 can be pressed in a well-balanced manner against the tensile force acting on the flexible membrane 1 on the downstream side of the anchor bolt 9, and air leakage from the weir A can be prevented.

Further, the water leached from the gap between the riverbed 3 and the receiving fitting 6 is prevented from leaking due to the close contact between the water stopping fitting 12 and the concrete of the riverbed 3, and the water is reliably stopped.

In addition, on the upper surface of the presser fitting 7, there are provided projections 17 located upstream and downstream of the fastening nut 15 and taller than the fastening nut 15. Damage to the fastening nut 15 and the anchor bolt 9 is prevented.

[0016]

As described above, according to the present invention, a plurality of opposed ridges are provided on a receiving metal fitting and a holding metal fitting to which an anchor bolt penetrates and are fixed to a riverbed with a fastening nut. Since the overlapping portion of the flexible film is pressed by the ridge, the flexible film is securely sealed and fixed, thereby preventing water leakage.

[Brief description of the drawings]

FIG. 1 is a front view of an undulating weir made of a flexible membrane.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged vertical sectional side view of a fixing structure according to the embodiment.

FIG. 4 is an enlarged vertical sectional side view of a conventional fixing structure.

[Description of Signs] A Undulating Weir B Blower 1 Flexible Membrane 2 Fixture 3 Riverbed 4 Slope 5 Supply / Exhaust Pipe 6 Receiving Bracket 7 Holding Bracket 8 Foundation Base 9 Anchor Bolt 10 Nut for Level Adjustment 11 Seal Washer 12 Water Stop Bracket 13 Packing 14 Seal washer 15 Tightening nut 16 Protrusion 17 Projection

Claims (4)

[Claims] 1. A flexible membrane is folded in two, its both ends are overlapped and directed toward the upstream side, sandwiched between a receiving member and a holding member in a river width direction, and a fastening nut is attached to an anchor bolt passing therethrough. In the fixing structure of the flexible membrane up / down weir that is screwed in and fixed to the riverbed, a plurality of opposed ridges are provided on the receiving metal fitting and the holding metal fitting, and the overlapping portion of the flexible membrane is pressed by these ridges. A fixing structure for a flexible membrane undulation weir characterized by the above. 2. A plurality of the ridges are arranged on a downstream side of an upstream side of an anchor bolt.
3. The fixing structure for a flexible membrane undulation weir according to item 1. 3. A level adjusting nut is screwed into the anchor bolt, a seal washer, a water stop metal, and a packing are sequentially interposed between the nut and the receiving metal. 3. The fixing structure for a flexible membrane undulation weir according to claim 1, wherein a seal washer is interposed between the ridges. 4. The fixing device according to claim 1, further comprising projections located on the upper surface of the holding member, located on the upstream side and the downstream side of the tightening nut and taller than the tightening nut. A fixing structure of a flexible membrane undulation weir according to any one of the above.