JPH059567B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an undulating weir or sluice gate made of a flexible membrane (prior art) An undulating weir or sluice gate made of a flexible membrane is a flexible membrane forming a weir body. An envelope (bag-like body) made of a synthetic membrane (e.g., rubber-coated cloth) is attached to at least the river bed in the direction across the river, and an expansion medium such as air or water is supplied from an inlet/exhaust (water) pipe communicating inside the envelope. It is designed to send fluid to expand and stand up, and also discharge fluid from the inside of the envelope to cause it to contract and fall down (for example,
(See No. 11702, Special Publication No. 44-2371).

The flexible membrane undulating weir or sluice gate is shown in Figure 3a. That is, in the figure, 1 is a flexible membrane forming the envelope, 2
3 is the foundation concrete, 3 is the watertight sheet, 4 is the mounting bracket, 5 is air or water, and 6 is the flow of water such as a river.

In the above case, if there is water on the downstream side, because the foundation concrete 2 is flat, even if the fluid inside the weir is discharged when the weir collapses, the membrane will not completely adhere to the foundation as shown in Figure 3c. In other words, a floating film F is formed (if there is no or little water on the downstream side, the film collapses and does not form a floating film). Note that FIG. 3b shows a state in which the fluid is being discharged.

(Problems to be solved by the invention) When such a weir is used as an estuary weir, a cofferdam in a harbor, a lock gate, etc., it not only obstructs ship navigation, but also causes damage to the floating membrane by the ship's hull or screw. I was afraid. Furthermore, even if the floating membrane were toppled over, there was a risk that it would be rolled up by the screw and similarly damaged.

In view of the above, the present invention has been developed to solve these problems.

(Means for solving the problem) That is, the undulating weir or water gate made of a flexible membrane of the present invention has the following features:
In undulating weirs, envelopes made of flexible membrane material are installed at least in two rows in the direction across the flow on the floor of a river, etc., and air or water is injected into the interior of the envelope to inflate. The upper surface integrated with the foundation concrete is provided with an uneven surface in which at least some or all of the convex portions are curved surfaces, so that when a weir or sluice gate is down, the flexible membrane that covers it is shaped into the uneven surface, thereby reducing the length of the floating membrane. It is characterized by being shortened or eliminated.

By making the unevenness so that at least a part or all of the convex portion is a curved surface, the flexible membrane covering the weir or water gate can easily conform to the unevenness when the weir or sluice gate collapses, and the flexible membrane can also be made uneven. This prevents scratches from occurring when pressed against the surface.

In addition, as a means to solve this problem,
An undulating weir or sluice gate made of a flexible membrane is also conceivable, the upper surface of which is integrated with the watertight sheet between the attachment intervals, provided with irregularities in which at least some or all of the convex portions are curved surfaces. Compared to this case, the present invention does not require any special processing on the watertight sheet, and also has the advantage that on-site installation work is less frequent.

The present invention will be described in detail below with reference to drawings of embodiments.

FIG. 1 shows one embodiment of the present invention, in which 1 is a flexible material such as rubber-coated cloth forming the envelope, 2 is foundation concrete, 3 is a watertight sheet, 4 is a mounting bracket, and 5
is air or water, 6 is a flow of water such as a river, and 7 is an inlet/outlet.

The present invention is particularly constructed as follows. First, it is composed of two rows of attachment lines A and B formed by attachment fittings. Next, this mounting line A,
The upper surface of the foundation concrete between B is provided with irregularities D in which at least some or all of the convex portions are curved surfaces. This unevenness D is usually parallel to the mounting direction.

(Function) In the present invention as described above, the straight line distance between A and B, that is, the straight line flow (by means of the unevenness in which at least some or all of the convex parts are curved surfaces) is provided on the foundation concrete. represents) from A,
The length along the uneven surface between B (represented by AB) is long, and the flexible membrane is exposed to AB due to the external pressure higher than the internal pressure when the weir collapses, so the conventional floating length can be shortened. , it is possible to lose it. This state is shown in FIG. 1b.

In the above, unless AB≧1.1×, in practice,
It has no effect on shortening or eliminating floating length. The watertight sheet 3 is always in close contact with the uneven surface D due to the pressure inside the envelope when the envelope is expanded, and due to the pressure outside the envelope when the envelope is contracted.

If the attachment lines are in one line, the covering will become as shown in Figure 4 when the weir collapses, and there will be no action to press the covering downward.

In addition, instead of providing unevenness to the foundation concrete in the case of Fig. 1, an unevenness forming object 9 is placed on the foundation concrete, and both of them create at least a projection on the upper surface that is integrated with the foundation concrete between the installation intervals. It is also possible to provide unevenness in which part or all of the surface is a curved surface. This is shown in FIG. 2 (the imaginary line indicates the time of envelope contraction).

The unevenness forming object 9 may be a pipe (for example, an iron pipe, a vinyl chloride pipe, a rubber pipe, etc.), a rod, etc., which has a rigidity greater than that which will not collapse at the depth of the water at the weir point.

In addition, if the part between the installation intervals where there is an uneven surface part that is integrated with the foundation concrete and at least part or all of the convex part is a curved surface is dug below the main body foundation concrete, the film will not come out on the main body foundation concrete surface S. The membrane will not be damaged by screws or the like (for example, see Figure 2).

(Effects of the Invention) According to the present invention as described above, even when used in estuary weirs, temporary cofferdams in ports, lock gates, etc., floating films of the envelope do not occur.
This results in an undulating weir or sluice made of a flexible membrane that does not impede the navigation of ships or cause damage to the membrane by ships.

[Brief explanation of the drawing]

Figures 1a, b and 2 both illustrate cross-sectional views illustrating the flexible membrane undulating weir or sluice of the present invention. Note that FIG. 1a shows the state when the covering is inflated, and FIG. 1 shows the state when the covering is contracted. FIG. 3 illustrates a cross-sectional view illustrating a conventional flexible membrane undulating weir or sluice.
In addition, Fig. 3 a shows the state when the cap is expanded, c shows the state when the cap is contracted, and b
is on the way from a to c. FIG. 4 is a diagram illustrating the fact that when the covering is attached in one row, there is no effect even if unevenness is provided as in the present invention. 1... Flexible membrane forming an envelope, 2... Foundation concrete, 3... Watertight sheet, 4... Mounting hardware, 5... Air or water, 6... Water flow, 7...
Inlet/outlet, 9...Object for forming unevenness (e.g. tube, rod, etc.), F...Floating film, A...Mounting line, B...
Installation line, D...Unevenness.

Claims (1)

[Scope of Claims] 1. An undulating weir in which envelopes made of flexible membranes are attached to at least the floor of a river or the like in two rows in a direction transverse to the flow, and air or water is introduced into the interior of the envelope to expand it. Or, in a water gate, the upper surface integrated with the foundation concrete between the installation intervals is provided with an unevenness in which at least some or all of the convex parts are curved surfaces, so that a flexible membrane that covers when the weir or water gate collapses. An undulating weir or sluice made of a flexible membrane characterized by shortening or eliminating the length of the floating membrane of the envelope by forming the irregularities. 2. The upper surface integrated with the foundation concrete between the installation intervals is provided with an uneven surface in which at least some or all of the convex portions are curved surfaces, by forming the upper surface only from the foundation concrete and applying the unevenness to it. An undulating weir or water gate made of a flexible membrane according to claim 1. 3. A patent claim that provides unevenness, in which at least some or all of the convex portions are curved surfaces, on the upper surface that is integrated with the foundation concrete between the installation intervals by placing an unevenness forming object on the foundation concrete surface. The undulating weir or water gate made of a flexible membrane according to item 1. 4. The undulating weir or sluice gate made of a flexible membrane according to claim 3, wherein the unevenness forming object is a pipe or a rod-shaped body. 5 Claim 1 states that the relationship between the straight line length between the mounting intervals (AB) of the two rows (A) and (B) and the length AB along the uneven surface is AB≧1.1. An undulating weir or sluice made of flexible membrane.