JPS6178912A - Flexible film rising and falling dam - Google Patents

Abstract

PURPOSE:To control the V-notch of a rising and falling dam made of a flexible film by a method in which partition films are provided in a baggy film to form independent plural air chambers, and independent air supply and discharge tubes are provided to each air chamber in such a way as to enable the air of the air chamber at a given position to be discharged at first. CONSTITUTION:Partition films 12 of a flexible film are provided in a baggy film 1 to form plurally independent air chambers 11', 11'', 11'''... in the traverse direction of a river. Independent air supply and discharge tubes 8', 8'', 8'''... are provided to the air chambers 11', 11'', 11'''..., respectively, and also exhaust valves 10', 10'', 10'''... are provided to the chambers. Control is made on the rising operation of an optional air chamber by opening an optional exhaust valve, and thereby V-notch or site for falling and effluence can be arbitrarily controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flexible membrane undulating weir, and more particularly to a flexible membrane undulating weir whose V-notch position can be controlled.

(Prior art) As shown in Figure 3.4, a flexible membrane undulating weir is a flexible membrane envelope (bag-like body) such as rubberized cloth that forms the weir body (a bag-shaped body) that crosses a stream such as a river. At least install it on the floor of a river, etc. in the direction of
A pressure medium such as air, water, or both of these is introduced into the envelope to expand and raise the envelope, and the pressure medium is discharged from the interior of the envelope to cause the envelope to contract and fall down. 40-11702, Japanese Patent Publication No. 44-2371).

In the air expansion type of this type of undulating weir, which uses water as the medium pressure medium, during the undulating process, if the internal pressure is low, a notch phenomenon (the internal pressure of the weir falls below a certain value) as shown by the imaginary line in Figure 6. Then, a part of the top of the weir suddenly drops in a V-shape.(13
) is the ■notch) or top surface, (3) is the concrete surface of the side wall where the enclosure is attached, (4) is the operation room, (5) is the blower, (
6) is the intake valve 1. (71 is an inlet pipe, (8) is an inlet/exhaust pipe, (9) is an inlet/exhaust port, and (10) is an exhaust valve.

(Problem to be Solved by the Invention) The location where this V-notch occurs depends on the specific flow center position of the river at the location where the undulating weir is installed, the accumulation of sediment on the upstream side of the envelope, etc. It was impossible to control the place.

In general, the river flow conditions at the location where the undulating weir is installed are limited, so the locations where V-notches occur are also limited;
In addition, there was a problem that the sediments other than the V-notch points were not flushed out.

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

(Means for Solving the Problems) That is, the present invention replaces the conventional envelope formed as an integrated air chamber (11) (see Fig. 3), and provides a partition membrane inside the envelope to prevent water leakage. A plurality of independent air chambers are arranged in a direction transverse to the flow, and an inlet/exhaust pipe is provided for each air chamber. Note that the above-mentioned direction of crossing the river flow is not limited to a direction of crossing the river flow perpendicularly, but is broadly interpreted to include a direction of crossing the river flow diagonally.

(Function) As described above, by first discharging the air from the air chamber at a predetermined position of the envelope, the notch or lodging discharge location can be arbitrarily controlled.

The invention will now be explained in detail with reference to exemplary FIGS. 1.2.

A flexible membrane partition @ (10) is provided in the envelope (1) that crosses the river and constitutes a weir body, and a plurality of independent air chambers (11'), ( 11”), (11
"')... are formed, and individual air intake and exhaust pipes (8'), (8"), (8")... are formed for each air chamber.
..., and optional exhaust valves (10'), (10"),
By opening (10''')... to exhaust the air from any air chamber and inverting it, and by sequentially inverting any air chamber, V/Notchi can control the lodging and discharge location as desired. Incidentally, the position of the partition membrane and the number of independent air chambers may be set arbitrarily, and are not limited to the six divisions shown in FIG.

Note that the same symbols in Figure 1.2 as in Figure 3.4 indicate the same parts, but (6'), (6"), and (6") are the air intake valves,
(7'), (7"), (7"') are inlet tubes, (8')
, (8″), (8″) is the injection and exhaust pipe, (9′), (9
“), (9///) is the inlet/outlet, (10'),
(10”).

(i()"') is an exhaust valve, (11'), (11"), (
11///) is an air chamber.

The above makes it possible to first evacuate the air in the air chamber at a predetermined position of the envelope.

(Effects of the Invention) The present invention has been described above, and the present invention has the following effects.

A partition membrane is provided within the envelope to create multiple independent air chambers,
Each has an intake and exhaust pipe. Therefore, the notch or lodging discharge location can be controlled as desired.

[Brief explanation of the drawing]

1 and 2 show a flexible membrane undulating weir of the present invention,
FIG. 1 is a cross-sectional view of the river flow, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIGS. 6 and 4 illustrate conventional undulating weirs made of flexible membranes. FIG. 5 is a view cut in a direction across the river flow, and FIG. 4 is a sectional view taken along line BB in FIG. 3. (1) Flexible membrane envelope,

Claims (1)

[Claims] (1) A flexible membrane envelope forming a weir body is attached to the river bed in a direction across the river flow, and air as a pressure medium is sent inside the envelope to cause it to expand or to discharge air from inside the envelope. In an air-inflatable weir that is made to collapse and collapse,
A flexible membrane envelope is provided with a flexible membrane partition wall, a plurality of independent air chambers are arranged in a direction transverse to the river flow, and each is provided with an independent inlet/exhaust pipe. An undulating weir made of a flexible membrane, characterized in that the V-notch generation position can be controlled by first discharging air from an air chamber at a predetermined position of the envelope.