JPS62178614A - Flexible film dam - Google Patents

Abstract

PURPOSE:To prevent interference with the progress of a ship by forming a recessed housing portion directed in parallel with both bottom edges of a flexible film and capable of housing the flexible film when fallen down on the river bed nut between both bottom edges of the upstream and downstream sides. CONSTITUTION:When a fluid present in the inside is discharged through a discharge pipe 6 under a condition that a flexible film 3 is raised, the film 3 is pressed on the upside of the upper part of a box-like part 7 and dropped from an opening 11 into a housing portion 12 to form a mutually faced pattern 3a on the central part of the film and also to form an air chamber 14 on the upper end of the portion 3a, where the film portion 3b adjacent to the mutually faced portion 3a is closely contacted with the bottom 8 of the part 7. By a suction force produced when discharging air in the housing portion 12 to the outside of the part 7 through the hole 13 and also by water pressure, the film 3 is pushed into the space surrounded by the upper edge 10, the uprising portion 9, and the bottom 8. The film 3 is further closely contacted with the outside and inside of the part 7 over its whole length.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible membrane weir that is laid across a river, rises when fluid is supplied, and collapses when discharged.
This relates to a tide weir constructed at a location with a high water level on the downstream side.

1 ζ ・J5 and [- Flexible membrane weirs, commonly referred to as rubber weirs, are easy to construct and inexpensive to manufacture, and are widely used for agricultural water intake and as tide protection weirs at estuaries.

In such a flexible membrane weir, a long flexible membrane (made of rubber or soft resin) is folded in half, both edges are aligned, and both edges are directed toward the upstream side, as shown in FIG. As shown in FIG. The flexible membrane weirs of the flexible membranes 03 of the fixed pores A and B types are particularly provided at locations with deep water on the downstream side, and are raised and lowered by supplying and discharging fluid.

By the way, when a two-row fixed type flexible membrane weir is collapsed by discharging fluid, the T'J of the flexible membrane weir is
The flexible membrane 03 moves along the fixed line Δ under water pressure.

From the B side, the fixed line Δ is brought into contact with the surface of the riverbed 02 from both sides toward the center of the riverbed 02 sandwiched between B, but when used as a weir, it is a flexible structure that stands up. The circumference of the sexual membrane 03 has to be longer than the interval between the two fixed lines △ and B, and therefore, it lies down from both sides of the fixed lines A and B, and only the part that is longer than the interval between the river bed parts 02 becomes the river bed part 0.
2 and the non-contact part that cannot contact this riverbed part 02 becomes a state of palms together, and an air gap 05 is formed at the tip of the state of palms together, and the 71 amount of air existing in this air chamber 05 becomes flexible. If11 exceeds the underwater/F suspension of sexual membrane 03
There is one problem in that the flexible membrane 03 does not lie down and floats in the water, causing trouble in the navigation of fishing boats, work boats, etc. that travel on rivers. - 1,1 Dimension for °1 Dimension: And for this reason, the present invention relates to an improvement of a flexible membrane weir that overcomes this additional point, and is directed to the improvement of a flexible membrane weir that crosses a river and both sides of the flexible membrane. The flexible membrane is fixed to the river bed at a distance, and receives approximately the same water pressure on the front and rear sides thereof,
In a flexible membrane weir that rises and collapses depending on the supply and discharge of fluid, a river bed sandwiched between both sides of the flexible membrane is oriented in a direction parallel to both side edges, and when collapsed, the flexible membrane weir is By forming the recessed storage part in which the flexible membrane can be stored, the recessed storage part formed in the river bed sandwiched between both side edges of the flexible membrane can be formed along the surface of this recessed storage part. The circumferential length of the flexible membrane can be stored in a bent state, and the circumferential length of the flexible membrane, which is longer than the gap between the riverbed portions sandwiched between the both side edges, is aligned with the axis of the depressed storage part. Since the surface length oriented in the direction perpendicular to ζ can be effectively used to drop the flexible membrane into the drop-in storage section, the underwater floating portion 1i□'a of the flexible membrane can be eliminated very easily.

T top DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, illustrated embodiments of the present invention will be explained.

FIG. 1 is a cross-sectional view showing an embodiment of a flexible membrane weir with a depressed storage section in the river bed, and FIG. 2 is a cross-sectional view showing the flexible membrane weir in a collapsed state. A long flexible membrane (made of rubber or soft resin 3) is folded in half and formed on both ends of the riverbed concrete 1, which is poured into the riverbed. With the edge 4 facing upstream, as shown in FIG. At the same time, both ends in the longitudinal direction are fixed to the river slope (not shown) to form an airtight bag-like body.Then, it is clamped on the surface of the riverbed concrete 1 sandwiched between the fixing lines A and B. A riverbed portion 2 is formed, and one side of the flexible membrane 3 is laid on this sandwiched riverbed portion 2 as well.

In addition, an air supply pipe 5 and a discharge pipe are provided on the surface of the flexible film 3 of the sandwiched river bed 2 to raise and lower the flexible film 3 of the bag-like body by supplying and discharging fluid. 6 is provided, and the air supply pipe 5 and discharge pipe 6 are connected to supply and exhaust equipment (not shown).

Furthermore, a bottom portion 8 is provided on the flexible membrane 3 of the sandwiched river bed section 2 between the fixed lines A and B on both side edges of the flexible membrane 3 in the direction across the river. Continuing from this bottom part 8 (forming a rising part 9 rising above the part,
The part following this rising part 9 is bent approximately 90 degrees, and this bent part forms an upper side part 10 that points toward the center from the left and right. A storage portion 12 is formed in a portion surrounded by the bottom portion 8, the rising portion 9, and the upper side portion 10, and the cross section is shaped like a rigid box with an opening 11 at the top. A member 7 (made of iron or glass fiber reinforced resin) is placed.

A portion of the box-like member 7 with an open top surface in contact with the surface of the flexible membrane 3 on the sandwiching bed portion 2 is fixed, for example, via a contact agent.

In the above-mentioned upper surface frontage ↑ 8-shaped member 7, if the upper surface open box-like member 7 becomes long and poses a problem in transportation and installation, the upper surface open box-like member 7 is divided into multiple circumferences in the longitudinal direction. However, each of these divided members may be arranged, and in the case of the embodiment, one strip of upper surface frontage box-shaped member 7 is shown in FIGS. 1 and 2, but multiple strips may be provided as necessary. They may be installed in parallel.

Furthermore, the rising portion 9 of the upper opening box-like member 7 contains fluid while the flexible membrane 3 contacts the bottom portion 8, the rising portion 9, and the opening portion 11 of the upper opening box-like member 7 when the flexible membrane 3 is collapsed. II, when the fluid comes out, the fluid is forced to flow in such a way as to facilitate fluid discharge therebetween and bring the flexible membrane 3 into contact with the bottom 8, the rising portion 9, and the opening 11 of the upper opening box-shaped portion 07. A hole 13 through which fJl can be emitted is provided.

Since the embodiment shown in FIGS. 1 and 2 is constructed as indicated by 1 m, the following describes the flexibility of the air format.
Regarding the weir, the air inside the flexible membrane 3 is forcibly discharged through the +Jl outlet pipe 6 connected to the supply and drainage pipe (not shown), and as a result, the air inside the flexible membrane 3 is 11. In the portions close to the fixed lines A and B, the outer periphery of the upper frontage box-like member 7 is pressed by the water pressure P and comes into contact, and the flexible membrane 3 located above the edge stands up. Approximately the center is curved and deformed, and an air chamber 14, which is an empty space within the limit where the flexible membrane 3 is bent, is formed in this curved and deformed portion, and both side portions are also compressed by the pressing force of water pressure P and air from both sides. The suction force caused by the discharge brings the palms into contact, and this part floats in the water. In the process in which the amount of the floating portion of the flexible membrane 3 in the water exceeds the mass of the remaining air in the entire air 14 of the flexible membrane 3 and it starts to collapse, the flexible membrane 3 It falls into the storage part 12 from the frontage 11 of the top-opening box-like member 7, and its lower part is in contact with the bottom 8 surface of the top-opening box-like member 7, and the air chamber 14 portion at the top surface position is at the initial floating top position. lower.

Roughly, the above-mentioned 11. 'As the suction operation in Ali's elbow 3 continues, the m', which was once in contact with this suction force at Jζ, is separated from the lower part of the folded membrane 3, and this part The portions of the flexible membrane 3 that have been exposed to the gas are exposed to the suction force caused by the suction operation, and the bottom portion 8, the rising portion 9, and the upper side portion 10 of the box-shaped member 7 with an open top surface and the flexible membrane 3 Since dark air is sucked out through the hole 13, the flexible membrane 3 has a bottom part 8, a rising part 9 and an upper side part 10 facing the storage part 12 of the upper opening box-shaped part 07. The air chamber 14 is brought into contact with the inner surface of the housing part 1 in a bent state against the water pressure P.
2 (see Figure 2).

As a result, the circumference of the standing portion of the flexible membrane 3, which is longer than the sandwiching bed portion 2, effectively matches the cross-sectional circumference formed by the circumferential length of the inner and outer surfaces of the box-shaped member 7 with an open top. Since the amount of water is absorbed by 1q, the surplus part of the flexible membrane 3, which is longer than the width of the river bed 2, is not suspended in the water, and the amount of the underwater vehicle of the flexible membrane 3 is reduced. The flexible membrane 3 is bent into contact with the storage portion 12 without causing the residual air chamber 14 formed in the flexible membrane 3 to protrude into the water from the upper surface of the top-opening box-shaped member 7. It can be completely collapsed very easily.

In addition, in order to more effectively discharge the air within the flexible membrane 3 during lodging, the spacer that is attached over half the circumference of the flexible membrane 3 and forms air passages on both sides thereof is omitted. can do.

Here, in the above, the two flexible membranes 3 are in contact and one of the flexible membranes 3 is able to move smoothly on the surface of the other flexible membrane 3. It is preferable to apply a lubricant thereto.

FIG. 4 shows a modification of the one-F opening box-shaped member 7 in FIG. Similarly, the flexible membrane 3 of the river bed section 2 is formed to have rigidity and is sandwiched between fixed lines A and B on both sides of the flexible membrane 3. Manufactured in
This shape has an elliptical cross section, and a flat bottom 21 is formed near the center of the surface located at the lower end.
1 is formed with an upper side 22 that is curved like a circumferential surface of a square circle, and an opening 23 is formed in the −L plane of this upper side 22 at a portion facing the bottom 21. A housing section 24 is formed in the interior surrounded by the bottom section 21 and the upper side section 22, into which the flexible membrane 3 falls and is stored when the flexible membrane 3 is laid down. Further, a hole 25 is formed in the surface of the upper side portion 22, so that air can be discharged more effectively through the hole 25.

Note that this modification has the same functions and effects as the previous embodiment, so detailed explanation thereof will be omitted.

Figure 5 shows the flexible membrane weir with 11 drop storage areas in the river bed.
Fig. 6 is a sectional view showing another embodiment of the invention, and Fig. 6 is a sectional view showing the collapsed state of the flexible membrane weir. The formed long flexible membrane weir (made of rubber or soft resin) 32
Fold in half, with both end edges 33 facing upstream, and
As shown in the figure, when fixing in two rows, a fixing line Δ on both end edges 33 and a fixing line B on the downstream side extending a predetermined interval from the position of this fixing line A, both ends in the longitudinal direction are connected to a river. The bag is fixed to a slope (not shown) and formed into an airtight bag-like body. Then, a sandwiched riverbed portion 31 is formed between the riverbed concrete 30 sandwiched by the fixed lines Δ and B,
One side of the +'+iJ flexible membrane 32 is also laid on this sandwiched river bed portion 31.

In addition, an air supply pipe 34 is provided on the flexible membrane 32 of the intercostal riverbed 31 to allow the flexible membrane 32 of the intercostal bag-like body to stand up and fall down by supplying and discharging fluid. , iJI Dekan 35
The air supply pipe 34 and discharge pipe 35 are connected to supply and exhaust equipment (not shown).

Further, below the sandwiched river bed section 31 between 15 between the fixed lines Δ and B on both side edges of the flexible membrane 32,
A recess 3G oriented in the direction tM across the river is formed, and this recess 36 has an opening edge 31 on the upper surface, and the opening edge 3
7.37 are open at predetermined intervals.

The opening edge 37 is formed of a clay wall 38 having a predetermined thickness, and the lower surface following the upper wall 38 is formed to face outward from the frontage edge 37, and the side wall 39 of the portion continuing to the upper wall 38 is dug to a predetermined depth below the top wall 38, and a bottom wall 40 is formed as a part continuing from this side wall 39,
The opening edge 37, top wall 38, and side wall 39 of the recess 36 (the inner side surrounded by υ and the bottom wall 40 is
When the membrane 32 is formed into a membrane 2, the flexible membrane 32 is used as a storage part 41 in which the flexible membrane 32 is dropped and stored.

Furthermore, I'lff laid on the same floor part 31
The removable film 32 is cut out along the frontage edge 37, and the removable film 32 of the same material and phase is cut out along the inner surface of the recess 36 formed in the sandwiched river bed 31. 3
2, and the lower surface of the upper wall 38 is provided with a long presser metal fitting 4 oriented in the longitudinal direction so that the flexible film 32 does not fall down.
2 to the earthen wall 38 with an anchoring member 43;
The vicinity of both ends 44 of the flexible membrane 32 attached in the four parts 36 is folded back to the surface of the flexible membrane 32 on the upper wall 38, and this part also pinches the flexible membrane 32 on the upper wall 38. The upper wall 3 is attached to the upper wall 3 by the anchoring member 43 via the long presser metal fitting 42.
8 and is anchored airtight.

Since the embodiment shown in FIG. 5 is constructed as described above, this embodiment is also similar to the above-mentioned embodiments. The flexible membrane 3 is
The air in 2 is forcibly sucked out, so that the portion of the flexible membrane 32 that is close to the fixed line Δ,B is connected to this fixed line A.

Start lodging along the surface of the flexible membrane 32 laid on the sandwiched river bed part 31 from both sides of B toward the center,
The flexible membrane 32 in the upper part thereof is deformed into a curve at approximately the center when it stands up, and an air chamber 45 is formed in this curved deformed part within the limit where the t+J flexible membrane 32 is bent. are brought into contact from both sides in a state of palms together due to the pressing force of water pressure P and the suction force of air discharge, and this part floats in the water. In the process where the weight of the floating portion of the flexible membrane 32 in water exceeds the mass of the remaining air in the air chamber 45 of the flexible membrane 32 and the flexible membrane 32 starts to collapse, the flexible membrane 32
is from the opening of the rain door edge 37 of the recess 36 to the storage section 4.
1, the lower part of the raised palms is brought into contact with the surface of the flexible membrane 32 on the bottom wall 40, and the upper part of the air chamber 45 is lowered than the initial floating top position.

Further, since the suction operation inside the flexible membrane 32 continues, the suction force separates the lower part of the flexible membrane 32 from the lower part of the palms in a state of prayer, and the separated flexible membrane 32
In this part, the suction force generated by the suction operation and the pressing force of the water pressure P cooperate, and the flexible membrane 32.32 contacts the contact f's (+=overcomes the force and collapses). The flexible membrane 32 moves, and this flexible membrane 32
The air chamber 45 is brought into contact with the surface of the flexible membrane 32 attached to the lower surface portion of the 8, the side wall 39 portion and the bottom wall 40 portion in a bent state. (See Figure 6).

As a result, the circumferential length of the standing portion of the flexible membrane 32, which is longer than the sandwiching bed portion 31, can be absorbed by the inner circumferential length of the four portions 36 by effectively utilizing the inner circumferential length of the four portions 36.
! ? ), the flexible membrane 32 can be
Even if the circumferential length of the flexible FF film 3 is formed to be narrower than the pinching bed portion 31J,
Without floating the excess circumference of 2 in water with palms together,
The flexible membrane 32 can be easily and completely laid down in the housing portion 41 of the recess 3G without contacting the flexible membrane 32 by bending.

In addition, lodging 11. In order to effectively exhaust the air within the flexible membrane 32, the flexible membrane 3
It is possible to omit the spacer which is attached over the half circumferential surface of the spacer 2 and forms an air passage on both sides thereof.

Here, in the above, the two flexible membranes 32 are in contact, and either one of the flexible membranes 32 is in contact with the other flexible membrane 32.
In order to smoothly slide on the surface of the L film 32, it is preferable to apply a lubricant thereto.

FIG. 7 is a cross-sectional view showing the essential parts of yet another embodiment in which the riverbed of the flexible membrane weir is provided with a drop-in storage section. Parts corresponding to the embodiments will be described using the same reference numerals.

Therefore, this embodiment forms a recessed storage section that is a combination of the previous embodiment and other embodiments described above, and this storage section 12 is made of river bed concrete as shown in FIG. -1-30 fixed line A.

The flexible membrane 32 is placed on the river bed 31 of Fu 14 sandwiched by B.
The four parts 5 ( ) with a rectangular cross section oriented in the longitudinal direction of the river, that is, the direction 1+ζ across the river, are dug and concrete is poured. The upper side 10 of the upper frontage box-like member 7 as shown in FIG. 3 is fitted into this recess 50 so that the upper surface thereof is flush with the river bed concrete 1 and 30.

In this case, in the optical embodiment, the upper opening box-shaped member 7
Although a hole 13 is bored in the rising portion 9 of , this hole 13 is unnecessary in this embodiment and is not provided.

In addition, a flexible membrane 3 laid on the sandwiched riverbed 31
Reference numeral 2 denotes the upper surface of the recess 50, and the edge at the frontage 11 of the upper side 10 is wound around and folded back to the inner surface of the upper side 10, and this folded portion is formed into a hole 5 that serves one side 10.
1 through the upper side part 10, and apply a long presser metal fitting 52 to the surface of the flexible film 32 laid on the surface of the upper side part 10. The embodiment shown in FIGS. 1 to 6 and other embodiments are similar to the embodiment shown in FIGS. 1 to 6, except that the bolt 53 is inserted through a washer 54 provided on that surface, and the bolt and nut are tightened and fixed airtightly. Since there is no substantial difference from the example, explanation of its function and effect will be omitted.

In the present invention, a depressed storage portion oriented in a direction parallel to both side edges of the flexible membrane is formed in the river bed sandwiched between both side edges of the flexible membrane. Even if the flexible membrane is formed to be larger than the gap between the river bed sections sandwiched between the two side edges, the circumference of the flexible membrane at this widened portion is equal to the cross-sectional circumference of the recess storage section described in l). The length of the flexible membrane can be effectively utilized and absorbed, and the flexible membrane can be easily stored in the drop-down storage area. Alternatively, it is possible to avoid troubles to work boats and the like.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a flexible membrane weir according to the present invention, which is equipped with a depression storage on the riverbed surface, FIG. 2 is a cross-sectional view showing the collapsed state, and FIG. 3 is the same as that shown in FIG. FIG. 2 is a partially cut-away perspective view of a member of the drop-in storage member used in FIG. Figure 5 is a cross-sectional view showing another embodiment of the present invention in which a depressed storage section is provided below the riverbed of a dam of a riverbed, and Figure 6 is a cross-sectional view showing the collapsed state. 7
The figure is a sectional view showing the main part of still another embodiment of the present invention, and FIGS. 8 and 9 are 1.
FIG. 14 is a cross-sectional view for explaining the structure and function. 1... Riverbed concrete, 2... Anchored riverbed, 3.
...Flexible membrane, 4...Both end edges, 5...Air supply pipe, 6
. . . Discharge pipe, 7. Upper opening box-shaped member, 8. Bottom, 9. Rising portion, 10. Upper side, 11.
Opening part, 12... Storage part, 13... Hole, 14...
Air chamber, 20...Top opening elliptical member, 21...Bottom, 22
...Top side part, 23...Frontage part, 24...Storage part,
25...hole, 30...riverbed concrete 1., 31.
・・Holding bed part, 32 ・Flexible membrane, 33 ・Both end edges, 34 ・Air supply pipe, 35 ・Antagonal outlet pipe, 3G ・・
・Concavity, 37...Opening edge, 38...Top wall, 39...
・Side wall, 40...Bottom wall, 41...Storage part, 42...
- Holding metal fitting, 43...Anchoring member, 44...Edge, 4
5... Air chamber, 50... Recess, 51... Hole, 52
... Presser fitting, 53 ... Bolt, 54 ... Washer.

Claims (1)

[Claims] A flexible membrane that crosses a river and is fixed to a river bed with both side edges of the flexible membrane separated and receives approximately the same water pressure at the front and rear of the flexible membrane, and rises and falls as fluid is supplied and discharged. In the weir, a depressed storage part is formed in the river bed sandwiched between both side edges of the flexible membrane, which is oriented in a direction parallel to the both side edges and in which the flexible membrane can be stored when it is toppled. A flexible membrane weir featuring: