JPH08226110A - Freely sinkable weir - Google Patents

Abstract

PURPOSE: To urgently react to the occurrence of a tidal wave or the like by providing a weir body jointed to an external air supply and exhaust device between breakwaters, housing the unused weir body in such a state as sunken to the sea bottom, and keeping the weir body afloat for use via the supply of the air. CONSTITUTION: A cylindrical body 1 is formed out of a flexible material such as rubber and synthetic resin reinforced with cloth, fiber or the like, and the external surface thereof is covered with a reinforcement member 2 made of a plurality of steel plates against a breakage, even upon the occurrence of collision with a floating substance such as driftwood, thereby forming a weir body. Furthermore, the weir body so formed is laid between breakwaters 3, and internally exhausted of the air, when not in use, thereby being sunken for storage in a recess 4 formed on the sea bottom. When a tidal wave occurs, the air is supplied from an external blower to the body 1 via an air supply tube 8, and the body 1 is kept afloat and moored to the sea bottom with tension members 7 and 14 formed out of a wire rope, a chain or the like. In this case, the body 1 may be not only cylindrical, but also square. According to this construction, the weir body can be urgently and safely installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floatable weir which is arranged between ridge walls at both ends of a port and which floats when gas is introduced and sinks when gas is discharged.

[0002]

2. Description of the Related Art Since ancient times, Japan has suffered many damages from tsunamis associated with earthquakes, and even now, there is a concern that a huge earthquake will occur especially on the Pacific coast, and countermeasures against tsunamis have become an urgent task. As part of the tsunami countermeasures, the construction of seawalls is in progress, but if the port entrances of the coastal ports are facing the open ocean, the tsunami will infiltrate into the port through this port entrance, and the vessels and ports May damage facilities. In order to avoid a tsunami while keeping the port open, it is necessary to make the port extremely narrow so that it is not substantially affected by the tsunami, or to make the direction of the port different from the direction of the tsunami. That is not possible with the majority of existing port facilities. Therefore, as a more realistic tsunami countermeasure for a port having such a port facing the open ocean, the port is closed in an emergency such as a tsunami to prevent the intrusion of the tsunami into the port and There is an idea to prevent damage. A facility or device that constantly closes the port entrance that is exerting its function in an emergency is required not to hinder the passage of ships when not in use. It must be able to return to its original state and be used repeatedly. Conventionally, since the port entrance has been closed urgently as a tsunami countermeasure, no specific facility or device that satisfies such a condition exists in reality. However, as a similar device, a flexible membrane weir known as a rubber weir that stands up by feeding in a fluid such as air and falls down by discharging as described in Japanese Patent Laid-Open No. 60-317317 is conventionally used for agricultural water. It is used for water intake and tidal weirs at river mouths. This rubber weir is a horizontally long hollow body that has a substantially U-shaped cross section when expanded, and is fixed to the riverbed at two lines, an upstream fixed line and a downstream fixed line at its lower end. is there.

[0003]

SUMMARY OF THE INVENTION The above-mentioned conventional rubber dam is
Since it stands up by sending in air and falls down by discharging it, it seems that it can be used for emergency closing of the port entrance as a measure against tsunami. However, such a conventional rubber weir is by no means sufficient as a device for closing the port entrance in an emergency. That is,
At the port entrance facing the open ocean, floating materials such as driftwood and swept ships may collide with the weir when the tsunami strikes, which damages the rubber weir and causes seawater to enter the hollow body. Due to the inflow, there is a risk that the rubber weir will sink and lose its function of preventing the tsunami. Therefore, in order to deal with such a case, it is preferable to reinforce the rubber weir with steel or the like, but this makes it difficult to sufficiently shrink the rubber weir after use, and the rubber weir sinks in an insufficient shrinkage state. It will interfere with the boat when not in use.
Therefore, the conventional rubber dam has a drawback that it cannot be reinforced with steel or the like. Further, when gas is fed into the conventional rubber weir, a gas pressure feeding device such as a compressor is installed near the rubber weir at each feeding so that the gas is fed from the gas inlet on the rubber weir. However, when a tsunami is imminently incurred, it is very dangerous to perform such a gas feeding operation near the rubber weir, which is a safety issue. Due to the various reasons described above, this conventionally known rubber weir cannot be used at all as a device for tsunami countermeasures. The present invention has been made in view of the above circumstances, and an object of the present invention is a floating weir capable of floating up and down arranged between ridge walls at both ends of a harbor, which floats when gas is introduced and sinks when gas is discharged. In addition, it is possible to reinforce the weir body with steel etc. or to form the entire weir body with steel so that it will not be damaged or settled due to collision with driftwood, etc., and gas can be safely sent in an emergency. it can,
It is to provide a floating weir to prevent tsunami from entering the port.

[0004]

Means for Solving the Problems The floatable sinker weir of the present invention which achieves the above object, comprises a cylindrical body 1 communicating with a gas pumping device disposed outside, and exhausting gas in the cylindrical body 1. When not in use, it is submerged and housed in the recess 4 formed in the floor portion 16 between the both ends of the harbor mouth, and when gas is fed into the tubular body 1 by the gas pressure feeding device, in use, The recess 4
It is characterized in that it is anchored to the seabed near the port entrance via a mooring tool so as to float up from above and close the walls between both ends. According to the present invention, when not in use, the gas inside the tubular body 1 is exhausted, so that the tubular body 1 sinks into the recess 4 formed in the floor portion 16 between the two end wall walls of the port entrance, This recess 4
It is housed inside and can be freely flown at the port entrance.
In an emergency, by feeding gas into the tubular body 1, the tubular body 1 rises from the recess 4 and closes the space between the two ridge walls. Further, since the inside of the tubular body 1 is always in communication with a gas pressure feeding device arranged outside the compressor or the like, when gas is fed into the tubular body 1 in an emergency, it is safe to keep away from the weir. Gas can be fed in by operating a compressor or the like arranged at various places.

[0005]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 3 show an embodiment of a floatable weir according to the present invention. FIGS. 1 and 2 show a state when in use and FIG. 3 shows a state when not in use. The tubular body 1 forming the weir is a hollow cylindrical body having both end surfaces closed, and is made of rubber / synthetic resin or preferably cloth inside thereof.
It is possible to maintain airtightness such as those with reinforcing materials such as nets and fibers embedded, or those that have been subjected to airtight treatment on cloth, and when injecting gas into the inside and using it as a weir, against external forces such as tsunami, storm surge, waves It is made of a material having sufficient strength. A plurality of plate-shaped reinforcing members 2 made of steel and extending in the axial direction are fixed to the outer periphery of the cylindrical body 1 at appropriate intervals by means such as bonding.

[0006] The floor between the two end walls of the harbor breakwaters 3 and 3'is reinforced with concrete or the like so that the connected tubular body 1 can sufficiently withstand an external force. A recess 4 having a width larger than the length of the tubular body 1 is formed so that the body 1 can be stored. A fitting 5 is provided at the lower end of the tubular body 1. Mounting brackets 6 are provided at corresponding locations on the floor 16 of the one recess 4, and the tubular body 1 is flexible such as fiber ropes, wire ropes, chains, etc. fastened to these mounting brackets 5, 6. It is connected to the floor portion 16 in the recess 4 via a connecting member 7 made of a material having properties.

A pressure feed gas transfer pipe 8 is attached to the breakwater 3, and the tubular body 1 is connected to the pressure feed gas transfer pipe 8 by a pressure feed gas feed hose 9. The hose 9 has flexibility, and is deformed following the ups and downs of the tubular body 1,
I try not to hinder the ups and downs of. Compressed gas transfer pipe 8
Is connected from a breakwater 3 to a gas pressure feeding device (not shown) such as an air compressor arranged at a safe place against a tsunami in the port facility. Therefore, the inside of the tubular body 1 communicates with the gas pressure feeding device via the pressure feeding gas feeding hose 9 and the pressure feeding gas transfer pipe 8. Further, in this case, it is preferable to provide a gas discharge valve 10 at the upper end of the cylindrical body 1 for discharging the gas inside the cylindrical body to the outside after use.

Concrete plate-shaped sinkers 11 are fixed to the sea bottom outside and inside the port entrance rather than the recess 4. The tubular body 1 is made of a flexible material such as a fiber rope, a wire rope, and a chain, which is attached to a mounting bracket 12 having one end fixed to the plate-like reinforcing member 2 and the other end attached to a mounting bracket 13 fixed to the sinker 11. It is connected to the sinker 11 by a pulling member 14 for preventing the inward and outward movement of the port having the members. The connecting member 7 and the tension member 14 constitute a mooring tool for locking the tubular body 1 on the seabed.

Next, the operation of the floatable weir having the above construction will be described. When not in use, the tubular body 1 is in a depressed position as shown in FIG.
Is housed inside. In an emergency when a tsunami is expected to occur, the gas pressure feeding device is operated to feed air or a gas such as argon into the tubular body 1 through the pressure feeding gas transfer pipe 8 and the pressure feeding gas feeding hose 9. To enter. The tubular body 1 into which the gas has been introduced expands into a cylindrical shape, and floats from the recess 4 due to buoyancy to reach the floating position shown in FIG. 1 or 2 to close the port entrance. After sufficiently feeding the gas into the tubular body 1, the operation of the gas pressure feeding device is stopped. The tsunami rushing to the port entrance is prevented from entering the port by the tubular body 1 thus closing the port entrance. At that time, the tubular body 1 is subjected to a large tsunami pressure toward the port, but since it is locked to the sinker 11 by the tension member 14, it is not washed into the port. Further, even if a floating object such as driftwood or a drifting ship collides with the tubular body 1, the tubular body 1 is reinforced by the reinforcing member 2, and therefore there is no risk of damage. Even if the water in the port is drawn out of the port before the tsunami occurs, the tubular body 1 is not washed out of the port.

When the danger of the tsunami disappears, the gas discharge valve 10 at the upper end of the cylindrical body 1 is opened to discharge the gas inside the cylindrical body 1 into the atmosphere, thereby removing the cylindrical body 1. Deflate.
When the tubular body 1 is sufficiently deflated, the gas discharge valve 10 is closed. The deflated tubular body 1 is sunk to the sinking position in FIG. 3 by its own weight and is housed in the recess 4.

FIG. 4 and FIG. 5 show a modification of the floating weir according to the present invention. In the modified examples of FIGS. 4 and 5, the same or similar components as those of the embodiment of FIGS. 1 to 3 are designated by the same reference numerals, and detailed description thereof will be omitted.
In the modified example of FIG. 4, the tubular body 1 is made of a material such as rubber and synthetic resin having the same flexibility as that of the above-mentioned embodiment, but has a rectangular tubular shape different from that of the above-mentioned embodiment. In the present modification, the reinforcing member 2 made of steel or the like is formed in a rectangular frame body, and the reinforcing member 2 is fitted on the outer side of the plurality of cylindrical bodies 1 at appropriate intervals in the vertical direction. , Is fixed to the tubular body 1 by an adhesive or other fixing means. Therefore, the tubular body 1 expands and contracts in a bellows shape as gas is fed and discharged, and when contracted, sinks into the recess 4 by its own weight and is housed in the recess 4 as indicated by a two-dot chain line. When extended,
It is designed to levitate due to buoyancy.

In the modification of FIG. 5, the rectangular tubular body 1 is entirely made of steel, and the outside is covered with rubber, synthetic resin or the like for rust prevention and cushioning. In this modification, when not in use, the cylindrical body 1 is
In order to settle at the position indicated by the alternate long and short dash line, it is necessary to separately inject water after discharging the gas. For this reason, in this modification, in addition to the above-described mechanism for gas supply and discharge, the valve 1 for injecting and discharging water in the cylinder is used.
5 is separately provided, and the valves 10 and 15 are automatically controlled to be opened and closed by sequence control or the like, so that water and gas are sequentially fed and discharged. In this modified example, since the tubular body 1 does not expand and contract, the recess 4 must be dug deeply corresponding to the height of the tubular body 1, but the tubular body 1 can obtain an extremely large strength. There is.

The sinker 11 is not limited to the one shown in the above embodiment, but may be a pile, a block or the like, and the material of the sinker is not limited to concrete but may be another material such as metal.

In the above-mentioned embodiments and modifications, the tubular body 1 is connected to the floor portion 16 of the recess 4 by the connecting member 7, but the tubular member 1 is tubular with the tension members 14 from both outside and inside. When pulling the body 1, the connecting member 7 can be omitted. On the contrary, when the connecting member 7 is used, the tension member 14 can be omitted.

[0015]

According to the present invention, the tubular body 1 sinks and is housed in the recess 4 formed in the floor portion 16 between the ridge walls at both ends of the harbor when it is not used. Without becoming
Since the depth of the recess 4 may be appropriately designed according to the height of the tubular body 1 at the time of subsidence, it is not necessary to pay attention to the height of the tubular body 1 at the time of subsidence, and it is made of rubber / synthetic resin. In order to cope with a tsunami such as reinforcing the tubular body 1 with steel or covering the tubular body 1 formed of steel with rubber / synthetic resin, the tubular body 1 having desired strength can be freely designed. it can. Further, since the inside of the tubular body 1 is always in communication with a gas pressure feeding device arranged outside such as a compressor, in case of emergency, operate the gas pressure feeding device arranged in a safe place away from the weir. By this, it is possible to quickly and safely carry out the air pressure feeding.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in use of an embodiment of a floating floatable weir according to the present invention.

FIG. 2 is a side view showing a state in use of an embodiment of the floatable sinkable weir according to the present invention.

FIG. 3 is a side view showing a state in which the floatable sink weir according to the present invention is not in use.

FIG. 4 is a side view showing a modification of the floatable weir of the present invention.

FIG. 5 is a side view showing still another modified example of the floatable sink weir of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Plate reinforcement member 3 Breakwater 4 Recess 5 Mounting bracket 6 Mounting bracket 7 Connecting material 8 Compressed gas transfer pipe 9 Compressed gas inlet hose 10 Gas discharge valve 11 Sinker 12 Mounting bracket 13 Mounting bracket 14 Movement prevention Tensile material 15 Valve 16 Floor

Claims (1)

[Claims] 1. A floor portion 16 between the bank walls at both ends of a harbor entrance when the tubular body 1 communicated with a gas pumping device arranged outside is exhausted from the gas in the tubular body 1. When the gas is sent into the cylindrical body 1 by the gas pressure feeding device, the depression 4 is stored in the recess 4 formed in
A floating weir capable of floating up and down, which is locked to the seabed in the vicinity of the port entrance via a mooring tool so as to float from above and close the walls of both ends.