JPH1060868A - Flexible membrane weir - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low cost and highly efficient flexible membrane weir which makes it possible to save power cost or time required to erect a flexible membrane weir based on an aqueous system by using air and/or water as an expansion medium of a flexible membrane and set the size and tensile force of the membrane to be equivalent or below that based on an air system. SOLUTION: In a flexible membrane weir 30, one end is opened in a water level in either upstream or downstream side while the other end is opened on the bottom of the flexible weir. A water way 50 having an on/off valve which supplies and or discharges water, and a pipeline 90, which supplies and or discharges air to a flexible membrane, are provided between both ends. The air 41 is pressed in by way of the piping when the flexible membrane weir 30 is erected, thereby expanding the flexible membrane 40. At the same time, river water 42 is arranged to flow naturally into the flexible membrane 40. When the flexible membrane weir falls down, the air 41 is discharged naturally or forcedly by way of the pipeline 90, thereby contracting the flexible membrane 40. The river water 42 inside the membrane film 40 is forcedly drained by way of the water way 50 by driving a pump outside the membrane film 40 (upstream river 70).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible membrane weir which is laid across a river or the like, stands up by supply of air and / or water, and falls down by discharge, and particularly has a water level on the downstream side. The present invention relates to a flexible membrane weir laid at a location, for example, a harbor inlet or a river entrance / exit with the open sea.

[0002]

2. Description of the Related Art In general, floodgates, tide barriers, and the like are made of steel and have large-scale facilities. Therefore, the one that raises or falls a flexible membrane weir by supplying and discharging an expansion medium, which is usually called a rubber weir, is often used for rivers because of its simple construction. It can be used for

However, unlike a floodgate or tide barrier provided in the middle of a river, the water level on both sides of the sluice or the tide barrier may be inverted, and it is necessary to stably stand in any state. In addition, since the water gate and the weir are opened when the water levels on both sides are the same, it is desirable that the flexible membrane weir be completely laid down with the water level on both sides being the same. Conventionally, as a method for inflating a flexible membrane constituting such a flexible membrane weir and erecting or contracting the flexible membrane to fall down, air is supplied as an inflation medium to an inner chamber of the flexible membrane. It has been employed to bother or exhaust the air in the inner chamber. Further, it is known to use water instead of air as the expansion medium, and to raise and lower the flexible membrane weir using water supply and drainage.

[0004]

On the other hand, in a river or the like where the water level is inverted, the water depth is large, and most of the upstream and downstream of the flexible membrane constituting the flexible membrane weir such as a large tide barrier. When the flexible membrane is inflated with air, the buoyancy of the air is large when the air system uses air as an expansion medium for expansion and contraction of the flexible membrane. To avoid excessive tension, increase the thickness of the flexible membrane main body or its side edges to withstand excessive tension, or use unnecessarily fixing jigs (holding fixtures, receiving fixtures, anchor bolts, etc.) to the riverbed. Need to be reinforced using.

In the case of a water system using water as an expansion medium for the flexible membrane, the water expands greatly in the outward direction (downstream of a river or the like) due to the weight of the water in the flexible membrane. In addition, the size of the flexible membrane, that is, the circumference thereof, is larger than that of the pneumatic type (increase by 30% in comparison with the pneumatic type), and the tension of the flexible membrane is also increased (increase by 20% in comparison with the pneumatic type). Therefore, the material cost, transportation and installation cost of the flexible membrane are increased. Furthermore, a large amount of water must be transferred when supplying and draining water to and from the flexible membrane, which requires a huge pump and a large amount of electric power, and requires a large running cost. For these reasons, there is a problem that it takes a long time for the flexible membrane dam to fall down, particularly to stand up, and it takes a long time to maintain and maintain the planned high water level and the planned high water flow rate.

Accordingly, the present invention has been made in view of the above circumstances, and the power cost required for erecting a water-type flexible membrane weir by using air and / or water together as an expansion medium for the flexible membrane. To provide a low-cost and highly efficient flexible membrane weir that can save the time and time and make the size of the flexible membrane and the tension of the flexible membrane equal to or less than the pneumatic type. It is the purpose.

[0007]

In order to achieve the above object, the present invention has the following constitution. The flexible membrane weir according to claim 1 of the present invention crosses a river or the like having a water level on the downstream side, and is fixed to a riverbed portion where both side edges of the flexible membrane are separated, and air or / and water In the flexible membrane weir that rises and falls due to the supply and discharge of water, one end is opened below the water surface of at least one of the upstream and downstream sides, and the other end is opened at the bottom of the flexible membrane weir. A water passage having an on-off valve for supplying and discharging water between both ends and a pipe for supplying and discharging air to and from the flexible membrane are provided, and when the flexible membrane weir stands, air is injected by the pipe. To expand the flexible membrane, and to allow the river water to naturally flow into the inside of the flexible membrane through the water channel. While contracting the flexible membrane, pumping the river water inside the flexible membrane by the water channel It is characterized in that the outside of FLEXIBLE film formed by forced water discharge.

Furthermore, in the flexible membrane weir according to the second aspect of the present invention, the river water and the flexible membrane can communicate with each other in the middle of both ends of the opening of the water channel, and can be airtight with outside air. And a river water storage tank provided with a simple hatch and the pump.

[0009] In the flexible membrane weir according to claim 3 of the present invention, a person can enter and exit the water channel provided between the river water reservoir and the flexible membrane. It is a feature.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the present inventors use air and water together as an expansion medium of a flexible membrane when erecting and laying down a flexible membrane weir. Considering the features possessed, and adopting a structure in which the supply and discharge of these media to and from the flexible membrane can be spontaneously introduced and discharged without using power, cost The present inventor has found that a flexible membrane dam which is inexpensive and has high performance can be constructed, and the present invention has been completed. That is, when the flexible membrane weir is to be erected, when the air inside the flexible membrane is supplied and expanded by a blower that supplies air, an expansion space is formed. By utilizing the water depth difference between the expansion space and the expansion space, it is possible to easily introduce naturally the river water on the upstream side, and thus, the lower part of the inner chamber of the flexible membrane is made of water and the upper part is made of air. An upright flexible membrane dam composed of the expanded medium used in combination is obtained.
In addition, when the flexible membrane weir standing in such a manner as to fall down, the river water in the flexible membrane inner chamber is drained to the outside by a pump and the flexible membrane is contracted by the water pressure of the river. The air in the interior of the flexible membrane can be naturally exhausted without using a blower, and the flexible membrane can contract and fall down to the riverbed.

An embodiment of the flexible membrane weir of the present invention will be described below with reference to the drawings.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
FIG. 2 with a flexible membrane weir using water and water
2 is a cross-sectional view taken along line AA ′, FIG. 2 is a plan view of the flexible membrane dam, and FIG. In FIG. 1, reference numeral 10 denotes a riverbed laid with concrete or the like. The flexible membrane 40 is fixed to the fixing lines A and B of the riverbed 10 by anchor bolts 60 with both side edges separated from each other to form a bag. Openings 91 for air supply / exhaust are provided in fixed portions that form the inner chamber 40A of the body and are fixed to both the banks 71 of the flexible membrane.

On the other hand, on the surface of the riverbed 10, the upstream river 7
A plurality of ridges 11 are provided at appropriate intervals on the riverbed 10 so as to extend in a direction perpendicular to the flow direction F of 0, and irregularities are formed on the riverbed 10 in this manner. When the flexible film falls down, it can be accommodated in this uneven portion. A water channel 50 having a plurality of openings 51 is laid between the ridges 11 so as to extend in the width direction of the river, and communicates with a water storage tank 100 that takes in and stores the upstream river 70 as shown in FIG. Thus, the other end side opening 52 is formed. Further, for supply and exhaust of the air 41, a pipe 90 having an opening 91 is laid on one of the river slopes of the flexible membrane so as to be able to communicate with the water storage tank 100, and the other end side opening 92 is formed. Has formed.

In this manner, as shown in FIG. 1, in the flexible membrane weir 40, the inner chamber 40 A of the flexible membrane 40 is taken in from the water channel 50 and supplied with the river water 42 introduced and the pipe 90. The air 41 forms an expanded and upstanding flexible membrane weir to separate the upstream river 70 and the downstream river 80.

In FIG. 3, reference numeral 100 denotes a water storage tank for storing air-tight river water 42 made of concrete or the like provided on land such as a dike or the like, and a water channel 50 between openings 51 and 52. Has been laid. Furthermore, for taking in and introducing the river water 42 from the upstream river 70 or the water tank 1
An opening 53 which also serves as drainage of the river water 42 in the area 00 is provided below the water surface on the upstream side, and is connected in the order of the filter F2, the pipe 55, the on-off valve V4, the pipe 57, and the on-off valve V1, and
The water channel 50 is configured so that water can be introduced into the water storage tank 100. In the pit 102 at the bottom of the water storage tank, the main submersible pump P1 is mounted and connected to the pipe 57 in the order of the pipe 54 and the check valve V2. Further, an auxiliary submersible pump P2 is placed in the bottom pit 102, and is connected to the pipe 57 in the order of the pipe 56 and the check valve V3. On the other hand, a blower B1 having a three-way on-off valve V5 provided with an opening 92 capable of opening to the atmosphere is installed on the rooftop of the water storage tank 100, and is connected to a pipe 90 having on-off valves V6 and V7. doing. In addition, a hatch 110 is provided on the ceiling of the water storage tank 100 so that it can be air-tight with the outside air and the upstream river 70 and the downstream river 80, or for people to enter and exit.

The operation of the flexible membrane weir according to the embodiment of the present invention will be described below. As shown in FIG. 2, the flexible membrane 40 is expanded in the inner chamber 40A of the flexible membrane 40 by water (using upstream river water) 42 and air 41 as an expansion medium, and the flexible membrane weir 30 stands. doing. When the upright flexible membrane weir 30 falls down, first, the three-way on-off valve V5
Is opened (the on-off valves V6 and V7 are normally closed), the air 41 in the flexible membrane inner chamber communicates with the outside air, and the air 41 of the expansion medium in the flexible membrane inner chamber is opened by the inflation pressure. Part 91
From the opening 92 through the trachea 90.

At the same time, the pump P1 is started (the hatch 110
Is open, the on-off valve V1 is closed, and the on-off valve V4 is open), the river water 42 remaining in the water storage tank 100 is passed through the pipe 54 and the check valve V
2. Drainage from the upstream river opening 52 to the upstream river 70 through the pipe 55 is started. On the other hand, since the air 41 compresses the flexible membrane with the water pressure received from the river, the natural exhaust is continued until the air 41 in the flexible membrane inner chamber hardly remains. Further, when the river water 42 in the water storage tank 100 is continuously drained, the river water 42 in the flexible membrane inner chamber starts flowing into the water storage tank 100 from the opening 52 through the water channel 50, and the pump P1
As a result, as the drainage continues, the river water 42 remaining in the flexible membrane inner chamber can be drained to the upstream river 70 through the pipe 54, the check valve V2, and the pipes 57 and 55.

In this case, the water storage tank 100 and the flexible membrane inner chamber 4
Even if the drainage of the river water 42 of 1A is completed or the operation of the pump P1 is temporarily stopped for checking the drainage state, the upstream river from the opening 53 by the action of the on-off valve V1 and the check valve V2. From 70, the river water 42 does not flow backward to the water storage tank 100 and is naturally introduced. In this way, the air 41, which is the expansion medium, is finally exhausted from the flexible membrane chamber to the atmosphere, and the river water 42 can be drained to the upstream river 70. The flexible film 40 is contracted by the discharge of the inflation medium, and is completely accommodated in the uneven portion formed by the ridges 11 provided on the riverbed 10, and the riverbed 10 is completely laid down.

Next, a description will be given of a case where the fallen flexible membrane dam 30 is erected. First, the hatch 110 is opened, the water reservoir 100 is opened to the atmosphere, and the on-off valves V1 and V4 are opened. When the river water 42 of the upstream river 70 passes through the pipes 55 and 57 through the filter F2 from the opening 53 through the filter F2. The water is naturally introduced into the water storage tank 100, and the storage of the river water 42 starts from the pits 102 and 101, and the water storage in the water storage tank 100 is continued. Next, when the opening 92 is closed by the three-way on-off valve V5 and the blower B1 is started, the air (outside air) 41, which has been dust-removed through the filter F1, starts to be supplied to the flexible membrane inner chamber 40A through the trachea 90, and the buoyancy is reduced. The obtained flexible film 40 starts to float from the riverbed 10 and further increases the volume of the flexible film 40A. Thus, the flexible membrane inner chamber 4
As the volume of 0A increases, the water tank 1
From 00, the stored river water 42 flows from the opening 52 through the water channel 50 to the space in the flexible membrane 40A from the opening 51 in a naturally introduced state, and functions as an expansion medium. As described above, by simultaneously performing the forced air supply of the air 41 and the spontaneous introduction of the river water 42, the flexible membrane expands by using the expansion medium of water and air together, and the flexible membrane stands up. The weir 30 can be configured.

As described above, when the flexible membrane 40 is erected by the expansion of the flexible membrane 40 or falls down by its contraction, the medium for the expansion and contraction can be introduced and discharged naturally. By adopting, it is possible to significantly reduce the time required for supplying and discharging the expansion medium, and to omit the power for supplying and discharging, thereby providing a flexible membrane weir with high efficiency and low cost. Can be.

In addition, inspection of pumps, piping, on-off valves V1 to V7 provided in the water storage tank 100, and other pits 10
For maintenance and inspection such as dredging and cleaning of sediment and the like deposited on the first and the second 102, it is possible to allow people to enter and exit the hatch 110 as necessary, so that such maintenance is easy. It is also possible to enter the flexible membrane inner chamber 40A via the water storage tank 100 and the water channel 50. Repair, maintenance of the ridge portion 11, and maintenance work such as refueling can also be arbitrarily performed. At the time of these maintenance operations, when the flexible membrane weir 30 lays down and the water storage tank 100 is filled with the atmosphere, the worker can perform the operation without providing the water-resistant equipment. 10
Even if 0 is sufficiently storing the river water 42, maintenance work of the entire flexible membrane dam 30 can be performed at a desired time by a diver or the like provided with diving equipment.

[0022]

As described above, in the flexible membrane weir of the present invention, when the flexible membrane weir is raised, air is blown from the outside air by a blower with a pipe to expand the flexible membrane. And the opening provided in the flexible membrane and another opening provided on the upstream river side can communicate with each other, so that the river water is made flexible through the water channel using the water depth difference from the upstream river. It is possible to flow naturally into the inside of the membrane, and when the flexible membrane dam falls down, the air is naturally or forcibly discharged by this piping by water pressure to shrink the flexible membrane, and the flexible membrane from the water channel. Since the river water 42 is forcibly drained to the outside (upstream river) of the flexible membrane by the inside of the membrane, the air and water can be used together as the expansion medium of the flexible membrane. In this way, it is possible to provide a flexible membrane dam that is inexpensive despite its large size, taking advantage of the respective media. In addition, as means for adjusting the intake and introduction (or drainage) of river water by making the inside of the flexible membrane communicate with the upstream river, the river water and the flexible membrane can communicate and close in the middle of the water channel. Since a river water storage tank provided with an on-off valve and piping, a hatch and a pump capable of sealing air from the outside air, and the like, the supply and discharge of air or water as an expansion medium of the flexible membrane inner chamber are performed by the on-off valve and It becomes easier to control the operating time of the pump. Furthermore,
Since the water channel provided between the river water reservoir and the flexible membrane allows people to freely enter and exit, maintenance and inspection of the ridges provided in the flexible membrane inner chamber, and water storage Maintenance and the like in the tank can be facilitated.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a flexible membrane weir of the present invention.
FIG. 3 is a sectional view taken along line XX in FIG.

FIG. 2 is a top view showing an embodiment of the flexible membrane weir of the present invention.

FIG. 3 shows an embodiment of a flexible membrane weir of the present invention, A-
It is A 'partial expanded sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Riverbed part 11 Convex part 20, 30 Flexible membrane dam 40 Flexible membrane 40A Flexible membrane inner chamber 41 Air 42 River water 60 Anchor bolt 50 Water channel 51, 52, 91, 92, 53 Opening 90, 54, 55, 56, 57 Piping 70 Upstream river 71 Embankment 80 Downstream river V1-V7 On-off valve P1-P2 Pump 100 Water storage tank 101, 102 Pit B1 Blower F1, F2 Filter F River flow 110 Hatch

Claims (3)

[Claims] 1. A flexible membrane that traverses a river or the like having a water level on the downstream side and is fixed to a riverbed where both side edges of a flexible membrane are separated from each other, and rises and falls by supply and discharge of air or / and water. In the flexible membrane weir, one end is opened below the water surface of at least one of the upstream and downstream sides, and the other end is opened at the bottom of the flexible membrane weir, and water is supplied and drained between these two ends. A water channel having an on-off valve;
A pipe for supplying / exhausting air to / from the flexible membrane is provided, and when the flexible membrane weir is raised, air is injected by the pipe to expand the flexible membrane, and the river water is allowed to flow through the water channel. When the flexible membrane dam falls down naturally, the air is naturally or forcibly discharged by the pipe to contract the flexible membrane, and the inside of the flexible membrane is reduced by the water channel. A flexible membrane dam, wherein the river water is forcibly drained to the outside of the flexible membrane by a pump. 2. A river water storage tank provided with a hatch capable of communicating with and closing river water and a flexible membrane, and having a hatch capable of airtightness with outside air, and the pump, in the middle of both ends of the opening of the water channel. The flexible membrane weir according to claim 1, wherein: 3. The flexible membrane weir according to claim 1, wherein a person can enter and exit the water channel provided between the river water reservoir and the flexible membrane. .