JPS5968413A - Flexible membrane weir - Google Patents

Abstract

PURPOSE:To remove deposited earth and sand causing insufficient weir height positively by constructing a second small-sized flexible membrane weir for high pressure near a fixture on the upstream side of a first flexible membrane weir on either of the inside or outside of the first flexible membrane weir. CONSTITUTION:The flexible membrane weir 1 is formed by the first flexible membrane weir 2 constructed in the direction crossing rivers and the second small-sized flexible membrane weir 3 constructed in parallel near the fixture 2A on the upstream side of the membrane weir 2. The membrane weir 3 is constructed outside or inside the membrane weir 2, and a high-pressure fluid is fed to or discharged from the membrane weir 3 and a fluid at normal pressure to or from the membrane weir 2 respectively and independently. When earth and sand deposit on both membrane weirs 2, 3 under a lying state, earth and sand depositing on the membrane weir 3 are collected positively to the upstream side when the high-pressure fluid is fed to the membrane weir 3 first and the weir is erected, and deposited earth and sand remaining on one part of the membrane weir 2 are washed away to the downstream side by a water current falling from the membrane weir 3. Accordingly, deposited earth and sand do not cause trouble when the membrane weir 2 is erected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a technique for removing earth and sand accumulated on a flexible membrane weir called a mu-weir.

Rubber salt, which expands and collapses when fluids such as air and water are introduced and discharged, is easy to construct and inexpensive, so it is widely used for agricultural water intake, seawater dams at river mouths, etc.

One of the problems when using this rubber salt is countermeasures against sediment accumulation. As a technical means for removing sediment that accumulates on the downstream side while the rubber salt is standing upright, there is a technique disclosed in Japanese Unexamined Patent Publication No. 54-16173, n. - (see Figure 1). That is, a plurality of flexible tubes 02 oriented in the flow direction are attached to the downstream surface of the rubber salt 01,
A part of the overflow water W is guided to the lower part of the rubber salt 01, and the accumulated earth and sand are washed away downstream.

However, as shown in FIG. 2, no technology has yet been proposed for removing the earth and sand 03 deposited on the top surface of the rubber salt 01 while it is lying down. If the rubber salt 01 is raised up without removing the earth and sand 03 in advance, the earth and sand on the top surface will be pushed to the upstream side, but due to the balance between the air pressure inside the rubber weir and the pressure of the earth and sand 03, the earth and sand 03'fr : It is not possible to remove the soil sufficiently, and there is a local shortage of Keyaki height in the place A where the earth and sand have accumulated (see Figures 3 and 4). In addition, the fourth
The two-dot chain line at 1'A indicates the position when the rubber salt Ol stands up normally.

If a local shortage of weir height occurs in this way, the desired water level cannot be secured.

The present invention aims to reliably eliminate accumulated sediment that causes insufficient weir height, and includes a first flexible membrane weir installed in the direction that completely traverses the river, and the same No. The upstream installation of the flexible membrane weir consists of a second small flexible membrane weir installed in parallel near the metal fittings; 1. The second small flexible membrane weir is connected to the first flexible membrane weir. The second small flexible membrane dam is filled with a high pressure fluid, and the first flexible membrane dam is filled with a normal pressure fluid. It is characterized by being able to be supplied and discharged independently.

As described above, the present invention provides that, either inside or outside the first flexible membrane weir, the upstream side of the first flexible membrane weir is installed near the metal fitting VC\the second high-pressure compact Since the flexible membrane weir has been installed, if earth and sand accumulates on the two flexible membrane weirs that are in a collapsed state, the first step is to send high-pressure fluid to the second high-pressure small-sized flexible membrane weir to raise it up. As a result, the sediment accumulated on the second high-pressure small flexible membrane weir is reliably brought to the upstream side, and the accumulated sediment remaining on a part of the first flexible membrane weir is transferred to the second high-pressure small flexible membrane weir. The water is swept downstream by the falling water from the small flexible membrane weir. Therefore, when the No. 10 flexible membrane weir is subsequently erected, the accumulated earth and sand will not be an obstacle, and the second high-pressure small-sized flexible membrane weir must be erected or If the first flexible membrane weir is erected in parallel with this, the first flexible membrane dam will be erected reliably and normally over its entire length, and the necessary weir height can be easily secured. .

An embodiment of the present invention shown in FIGS. 1 to 8 will be described below.

Flexible membrane weir (hereinafter simply referred to as rubber salt) 2 consists of a first rubber salt 2 laid across a river on a concrete riverbed 4, and a first rubber salt 2 laid on the riverbed concrete 4 in a collapsed state. It consists of two small rubber salts. The supply and exhaust systems of both rubber weirs 2 and 3 are independent. The standing weir height of the second small rubber salt 3 is 20 to 50% of the weir height of the first rubber salt 2. The position of the anchor pole 3A for fixing the second small rubber salt 3 is shifted upstream by a distance relative to the anchor pole 2A for fixing the flat rubber salt 2. The distance is
The second small rubber weir 30 may be set as large as possible to obtain the earth and sand removal function described later by the second small rubber salt 3.
Lodging width (see Figure 5 above).

The procedure for standing up the rubber salt 1 with earth and sand 5 deposited on the upper surface of the rubber salt 2 having such a structure as shown in FIG. 5 will be described below.

First, when high-pressure air is introduced into the second small rubber weir 3 to raise it up, the earth and sand 5 accumulated thereon are pushed away to the upstream side (see Fig. 6). The air pressure at this time is 1
It may be adjusted according to the amount of accumulated sediment, but it should be about 3 to 5 times the normal internal pressure of a rubber weir, which is about the weir high water head pressure. Therefore, the second small rubber salt 3 needs to have a structure that can withstand high internal pressure.

At the stage when the second small rubber salt 3 is erected, the earth and sand 5a remains on the first rubber weir 2, biased towards the downstream side.
When the water level on the upstream side rises after passing for a predetermined period of time, the earth and sand 5a are removed by the falling water flow (spiral flow) from the second small rubber salt 3 (see FIG. 7).

After the earth and sand 5a is removed in this way, the second small FICOM weir 3'f is once collapsed, or while being collapsed, air is introduced into the first rubber weir 2 to make it stand up (second (See Figure 8). At this time, the top sand 5 on the second small rubber weir 3 is already
The first rubber salt 2 is pushed away to the upstream side and stands up in a normal state without being obstructed by the earth and sand 5.

In addition, compared to the second small rubber weir 3'f, which once lies down and then stands up the first rubber salt 2, when the former is still in the upright state, it starts the uprighting of the latter, and its Immediately after the former (
When the second small rubber salt 3) is lodged, the earth and sand removal effect to the 1st upstream side is better.

Further, in this embodiment, the second small rubber salt 3 can be used not only for removing accumulated earth and sand, but also as a rubber salt in its original meaning. Therefore, according to rubber salt 1, both rubber weirs 2-. 3 can be used to secure two different weir heights.

Further, in the above embodiment, the second small rubber salt 3 was disposed outside the first Nocom weir 2, but as shown in FIGS. 9 to 11, the second small rubber salt 13 (for high pressure )'? i:
It can also be arranged within the first rubber weir 12.

That is, the rubber salt 11, the second small rubber salt 13 and the first rubber salt 12 are integrally fixed to the river bed concrete 4 by the anchor pole 12A.

When removing the accumulated earth and sand 5 on the rubber weir 11, first, the second small rubber weir 13 is erected, and the earth and sand 5 above it is removed.
Push it away to the side of the plan. At this time, the first rubber salt 12 is
It is lifted along the surface of the second small rubber salt 13, and its downstream surface is smoothly covered with the river bed concrete 4.
Because it hangs down to the side, the flow of the falling water from the first and second small rubber salts 13 is smooth, and it becomes a good jet flow to remove the sediment remaining on the first rubber [12]. 1
(see l).

After the upper sand 5 on the rubber weir 11 is completely removed in this manner, the first rubber salt 12 may be raised (see FIG. 11). At this stage, the second small rubber salt 13 may be laid down, but if there is a large amount of sediment accumulated on the upstream side, the second small rubber weir 13 may be kept in an upright position. , deformation of the first rubber salt 12 can be prevented.

According to this embodiment, both rubber weirs 12 and 13 can be mounted using metal fittings, and by arranging the second small rubber salt 13 within the first rubber weir 12, the appearance is simplified, and the second Also, no damage to the small rubber salt 13 occurs.

As is clear from the above explanation, in the present invention, the upstream side installation of the first flexible membrane weir installed in the direction across the river is carried out on the outside of the flexible membrane weir near the metal fittings. Since a second small-sized flexible membrane weir for high pressure was installed on the inside of the prison, even if earth and sand were deposited on the upper surfaces of both flexible membrane weirs that were in a collapsed state, the second small-sized flexible membrane weir for high pressure By erecting the flexible membrane weir, the accumulated sediment is effectively removed, and the 10th flexible membrane weir is erected completely and uniformly over its entire length without the sediment becoming an obstacle. The necessary weir height will be secured.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view showing a known rubber salt that has the function of removing accumulated sediment on the downstream side, Figure 2 is a longitudinal cross-sectional view showing the rubber weir covered with accumulated sediment, and Figure 3 is a vertical cross-sectional view showing the state in which the rubber weir is covered with accumulated sediment. 4 is a sectional view taken along the line ■-■ in FIG. 3; FIG. 5 is a vertical sectional view of the rubber salt according to an embodiment of the present invention; FIG.
8 to 8 are explanatory diagrams showing the procedure for raising the salt, FIG. 9 is a vertical sectional view of rubber salt according to another embodiment, FIGS. 10 and 11.
The figure is an explanatory diagram showing the standing procedure. Industrial rubber weir, 2...first rubber salt, 2A...anchor bolt, 3...second small rubber salt, 3A...anchor bolt, 4...river bed concrete, 5 river earth and sand ,1
1... Rubber salt 112... The first rubber salt, 12 people...
・Anchor bolt, 13...Second small rubber salt. Agent Patent attorney Nozomi Ehara 1 person ¥1 Figure W Figure 2 1 Figure 3 Figure 4 1 Figure 5 70 Figure 9 R Figure 11 2 69

Claims (1)

[Claims] Flexible membrane weir No. 1 was laid in the direction across the river,
The upstream installation of the flexible membrane weir No. 0 consists of a second small flexible membrane weir installed in parallel near the metal fittings, and the second small flexible membrane weir is connected to the - The second small flexible membrane weir is provided with high pressure fluid, and the first flexible membrane weir is provided with normal pressure fluid. A flexible membrane weir characterized by the fact that each fluid is supplied and discharged independently.