JP3609546B2 - Flexible membrane weir - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible membrane weir that is laid across a river or the like, stands by supply of air or / and water, and collapses by discharge. The present invention relates to a flexible membrane weir laid at the entrance to the river outside.
[0002]
[Prior art]
The sluice gate, tide weir, etc. are generally made of steel and have a large scale of equipment.
Therefore, what is usually called a rubber weir, which stands or falls on a flexible membrane weir by supplying and discharging a fluid, is easy to construct, and is often used in rivers. It can be used.
[0003]
However, unlike sluices and tide weirs, which are provided in the middle of a river, the water levels on both sides of the sluice and tide weir must be reversed, and it is necessary to stand up stably in either state. In addition, since the water gates and weirs are opened when the water levels on both sides are the same, it is desirable to completely collapse the flexible membrane weirs with the same water level on both sides.
However, when trapping, air is trapped inside the bag and partially forms a floating film, or even if there is no air remaining, there is a part that is not fixed to the riverbed, so it is difficult to float completely in the water and make it completely lying down Met.
[0004]
As a method for solving this problem, a method of making the medium to be supplied to and discharged from the flexible membrane weir liquid, and a method of providing irregularities on the bottom surface so that the bag body falls along the irregularities (Japanese Patent Publication No. 5-9567). There is.
[0005]
[Problems to be solved by the invention]
However, in the former method, it is difficult to secure a liquid as a medium, and a facility for securing the liquid is required, which not only has a high initial cost, but also requires a large cost for maintenance.
[0006]
In the latter example, as such a flexible film weir, here, as shown in FIG. 5, the unevenness is formed by the spacer provided at the bottom, and the circumferential length of the bag body is made equal to the unevenness. An invention that is completely lying down is disclosed.
That is, in the figure, 10 is a river bed made of basic concrete, 20 is a pipe-shaped spacer, 30 is a flexible membrane weir, 40 is a flexible membrane forming a bag, 50 is an anchor bolt as a mounting bracket, 70 Is a flow of water such as a river, and 80 is a fluid (air or water).
FIG. 5A shows a state in which the flexible membrane 40 is standing. In the above case, when there is water on the downstream side, the fluid 80 of the flexible membrane 40 is discharged and the flexible membrane 40 is laid down. Is started, the flexible film 40 can draw in the floating film 40A generated in the final stage of the spacer 20 falling process through the process of the falling state of FIG.
[0007]
Eventually, the flexible film 40 may be buried between the spacers 20. However, the spacer 20 is inherently fixed to the river bed 10 and has limited performance. Further, since the surface of the spacer 20 becomes rough due to changes over time, the pulling of the floating film 40A is hindered, so that a part of the flexible film 40 is part of the basic concrete 10 as shown in FIG. There is a problem that the floating film 40 </ b> A occurs without being in close contact with the substrate.
When such a flexible membrane weir is used for a river or an estuary weir, it will inhibit the flow of river water or towage of a ship or the like.
[0008]
The present invention has been made in view of this point, and an object of the present invention is to provide a flexible membrane weir that is easy to construct and can completely collapse the flexible membrane weir.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows. The flexible membrane weir according to claim 1 of the present invention traverses a river or the like having a water level on the downstream side, fixes both sides of the flexible membrane to a river bed portion having an uneven portion, air or / And in flexible membrane weirs that stand up and fall by the supply and discharge of water, so that the ridge members that form the convex portions in the concave and convex portions extend in a direction perpendicular to the flow direction of the river etc. A saddle-like member having rigidity, and a support member made of an elastic body that supports the saddle-like member so as to be movable on the river bed with respect to the flow direction of the river, etc. The flexible film thus formed is laid down along the plurality of hook-shaped members and the recesses formed between the plurality of hook-shaped members .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the flexible membrane weir of the present invention will be described below with reference to the drawings.
【Example】
FIG. 1 shows a first embodiment of a flexible membrane weir provided with a ridge member forming a convex portion in a direction perpendicular to the flow direction of a river or the like and movable on the river bed with respect to the flow direction of the river or the like An example lodging process is shown.
In FIG. 1 (a), reference numeral 1 denotes a riverbed portion constructed of concrete or the like, and is fixed to anchoring bolts 5 on the fixing lines A and B of the riverbed portion 1 while separating both side edges of the flexible membrane 4. Thus, the inner chamber of the bag-like body is formed, and the flexible membrane weir 3 is laid so as to be able to stand up and fall by supply and discharge (exhaust) of air 8.
[0012]
On the other hand, on the surface of the riverbed portion 1, a plurality of ridge members 2 are arranged on the riverbed portion 1 at appropriate intervals so as to extend in a direction perpendicular to the flow direction F of the river etc. 7. Is attached so as to be movable on the river bed portion 1, and thus unevenness is formed on the river bed portion 1. Furthermore, a supply / discharge pipe 6 for supplying air or exhausting the flexible film weir 3 is provided in the flexible film weir 3.
[0013]
FIG. 1B is a cross-sectional view of the flexible membrane 4 illustrating the initial exhaust state, and when the flexible membrane 4 starts evacuation, the upper side of the fixing lines A and B is the upstream and downstream 7 side. In contrast to the phenomenon caused by the pressure of the water pressure and the exhaust of the filling air, the lodging starts, in contrast, a curved portion (blocking portion) 4B that begins to bend inwardly and deforms, and a floating portion 4A that protrudes outward is formed. Is done.
[0014]
FIG. 1C is a cross-sectional view showing the further progress of the collapse of the flexible membrane 4, and as the exhaust of the inner chamber of the flexible membrane 4 proceeds, the curved portion 4 </ b> B and the ridge member 2 become one. The part becomes blocked. Furthermore, as shown in FIG. 1 (d), when the exhaust of the inner chamber proceeds, the flexible film 4 settles on the pit portion of the river bed 1 together with the ridge member 2 so as to cover the ridge member 2. In this way, complete collapse of the flexible membrane weir 3 is possible.
[0015]
FIG. 2 (a) is a perspective view showing the entire structure of the ridge member 2, and the member constituting the ridge member 2 is a semi-cylindrical member 2A2 having a pedestal portion 2A2, and supports this. The support member 2 </ b> B is formed, and the hook-shaped member and the support member 2 </ b> B are attached and integrally formed by the metal fitting 2 </ b> C.
FIG. 2 is a sectional view of the ridge member 2 as shown in FIG. 2. As shown in FIG. 2 (b), the material forming the flange-shaped member 2A is a metal such as steel, a hard resin having rigidity such as FRP, or the like. Further, the surface 2A1 has a convex shape, and it is desirable to provide smoothness by cutting and polishing, fluororesin processing or the like. Further, by providing the pedestal portion 2A2, the ridge member 2 is prevented from falling to the river bed 1. In this case, a gap 2A3 is provided between the pedestal 2A2 and the river bed 1, and the saddle-shaped member 2A does not normally contact the river bed 1.
[0016]
Further, as shown in FIG. 2 (c), the support member 2B is obtained by vulcanizing and attaching a mounting bracket 2C on the upper and lower sides of an elastic body 2B1 such as elastically deformable rubber, and the upper bracket 2C is attached to the bowl-shaped member 2A. Fastened and fixed by screws 2C1 or the like.
The other metal fitting 2C is fixed to the river bed 1 by anchor bolts 2D.
In this way, a plurality of ridge members 2 composed of the support member 2B and the hook-like member 2A for supporting the hook-like member 2A are laid on the river bed 1.
[0017]
3 (a) and 3 (b) are front and side views showing another embodiment of the present invention, and a plurality of elastically deformable laminated rubbers in which elastic bodies and hard plates are alternately laminated as the supporting member 2B. 2B1 is installed on the upper and lower surfaces of the intermediate plate 2B2, and one of the upper and lower surfaces is fixed to the saddle-like member 2A side and the other one is fixed to the riverbed 1 side with screws or the like.
[0018]
Next, the operation in the embodiment of the present invention will be described.
FIG. 4 illustrates the interaction between two adjacent ridge members 2 and the flexible film 4 between them.
Flexible membrane 4 shown in FIG. 4 (a) when in contact so that bottom landing on ridges member 2 provided on the bed 1, the pressure P ₁ of the interior of the flexible membrane 4, on Since the water pressure P ₂ is lower than the downstream pressure 8, the volume in the flexible membrane is successively reduced by the pressure difference ΔP between P ₁ and P ₂ as the water pressure P ₂ continues to be loaded.
On the other hand, the flexible film 4 between one ridge member 2 and another ridge member 2 adjacent thereto forms a curved portion 4B having a predetermined radius of curvature R on the river bed side. Between the tension T applied to the flexible film 4 between the two ridge members 2 and the differential pressure ΔP and the radius of curvature R,
T = ΔP · R
The relationship holds.
[0019]
Here, as shown in FIG. 4 (b), one ridge member 2 is supported by an elastic body 2B1 movable on the river bed in the flow direction F of the river 7 or the like. It can be displaced horizontally with respect to the riverbed 1 in either direction. Accordingly, since it is possible to relax the tension T ₁ of the curved portion 4B so slackening curved section 4B by the horizontal displacement, the bending portion bending portion 4B is the R ₁ in the radius of curvature R of the curved portion having a smaller R ₂ 4B comes to be formed.
Further, since the smooth surface 2A1 is provided on the surface of the ridge member, there is little frictional resistance between the flexible film 4 and the ridge member 2, which is effective in reducing the tension T.
[0020]
As a result, as the above action progresses one by one, the surface of all the ridge members 2 is covered with the flexible film 4, and the flexible film 4 is ridged as shown in FIG. Since the member 2 and the riverbed part 1 are housed in the uneven part formed by the both, the floating part of the flexible film 4 at the time of the fall can be absorbed to achieve the complete fall of the flexible film 4. Further, even if the flexible membrane weir 3 is erected while supplying air into the flexible membrane again, if the flexible membrane 4 is separated from the surface of the convex member 2, the convex member 2 is acceptable. It is released from the restraint of the horizontal displacement due to the tension of the flexible film, and can be easily restored to the mounting state before the displacement by the elastic deformation of the elastic body 2B1 of the support member 2B.
[0021]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a flexible membrane weir that is easy to construct and can completely collapse the flexible membrane weir.
[Brief description of the drawings]
FIGS. 1A to 1D are cross-sectional side views showing a flexible membrane weir mounting structure according to an embodiment of the present invention from a standing state to a lodging state of the flexible membrane weir.
2 is an enlarged perspective view and a cross-sectional side view of a main part of FIG. 1. FIG.
FIG. 3 is an enlarged front view and a side view of an essential part of the outside of the present invention.
4 is an enlarged cross-sectional side view of the main part of FIG. 1. FIG.
FIGS. 5 (a) to 5 (c) are cross-sectional side views showing a state in which the flexible membrane weir is standing up to lying down, showing a conventional flexible membrane weir mounting structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 10 River bed part 2 ridge member 3, 30 flexible membrane weir 4, 40 flexible membrane 2D, 5, 50, anchor bolt 6, 60 supply, exhaust pipe 7, 70 river flow 8, 80 gas 4A, 40A Floating part 4B, 40B Curved part 2A Fence-like member 2A1 Fluororesin layer 2A2 Pedestal part 2A3 Gap 2B Bearing member 2B1 Elastic body 2B2 Intermediate plate 2C Mounting bracket 20 Spacer F River flow direction R Curvature radius T Tension

Claims (1)

A flexible membrane that crosses a river with a water level on the downstream side, separates both side edges of the flexible membrane and fixes it to a riverbed with irregularities, and rises and falls by supplying and discharging air or / and water In the weir,
A ridge member that forms a protrusion in the concavo-convex portion is provided so that the ridge member extends in a direction perpendicular to the flow direction of the river or the like, and the ridge member is connected to the river or the like. A support member made of an elastic body supported so as to be movable on the river bed with respect to the flow direction;
A flexible membrane weir characterized in that the flexible membrane that has been brought into a lying state from a standing state is allowed to fall along a plurality of hook-shaped members and concave portions formed between the plurality of hook-shaped members. .

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