JP2014173248A - Stand-and-lie gate type breakwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it unnecessary for divers to dive and remove the bottom material which deposits in a door body storing space of a storage part.SOLUTION: A stand-and-lie gate type breakwater closes a port entrance by making a lying door body 1, which is stored inside a door body storing space 2a formed in a storage part 2, stand up. It comprises: a water intake pipe 3, whose one end opens to a sea area 5 while the other end opening between the floor face 2aa and the opposite-sea face 1b of the aforesaid lying door body 1 in the door storing space 2a; and a water drainage pipe 4, whose one end opens opposite the other end opening 3b of the water intake pipe 3 while the other end of itself opening to the sea area 5. The water intake pipe 3 is provided with a check valve 6 which only allows the inflow of seawater in a direction from the sea area 5 side to the door storing space 2a, while the water drainage pipe 4 is provided with a check valve 7 which only allows the outflow of seawater in the direction from the door storing space 2a to the sea area side. With this way, it is possible to discharge the bottom material accumulated in the door body storing space with the effect of water surface change made by wind-waves.

Description

  The present invention relates to a undulating gate type breakwater installed at a port entrance as a countermeasure against storm surges and tsunamis.

  The undulating gate breakwater is designed to prevent the storm surge and tsunami from entering the port by raising the door stored in the collapsed state and closing the port entrance when a storm surge or tsunami is predicted ( For example, see Patent Documents 1 and 2.)

  In the case of such a undulating gate type breakwater, the door body storage space of the storage part for storing the door body has an open upper surface, and therefore sediment is unavoidably deposited in the door body storage space. If the accumulated sediment covers the door body in a lying state, it may occur that the door body is hindered to stand.

  Therefore, conventionally, divers periodically dive into the door storage space of the storage unit, and the accumulated sediment was discharged from the door storage space using a submersible pump.

  However, the work of discharging the bottom sediment deposited in the door storage space by diving periodically diversifies the diver. Also, depending on the weather conditions, it may be impossible to discharge when scheduled, but in such a case, more sediment will be discharged than the planned amount of sediment at the next discharge, Diver's burden becomes larger.

JP 2007-2111457 A JP 2010-133095 A

  The problem to be solved by the present invention is that when divers periodically dive and drain sediments deposited in the door storage space of the storage unit, a great burden is imposed on the divers. In addition, if work is not possible due to weather conditions, the sediment will be discharged more than the planned amount of sediment at the next discharge, which increases the burden on the diver. Is a point.

  In order to solve the above-described problems, the present invention has been made in order to prevent the diver from needing to drain the sediment deposited in the storage space of the door body of the storage unit.

The present invention
A undulating gate type breakwater that erects a fallen door body stored in a door body storage space formed in the storage section and closes the port entrance,
One end is open to the sea area, and the other end is a water intake pipe that is open into the door body storage space between the floor surface of the door body storage space and the surface on the side opposite to the sea area of the lying down door body,
A drainage pipe that opens in the door body storage space so that one end faces the other end side opening of the intake pipe, and the other end opens in the sea area;
With
The intake pipe has a check valve that only allows seawater to flow into the door housing space from the sea side, and the drain pipe has a reverse valve that only allows seawater to flow from the door housing space to the sea side. The main feature is the provision of a stop valve.

  In the present invention described above, when the water surface fluctuates due to wind waves, if the water pressure at the opening position on one end side of the intake pipe is higher than the water pressure at the opening position on the other end side of the drain pipe, the door storage space is removed from the intake pipe. After that, seawater flows so as to be discharged into the sea through the drainage pipe, and the sediment deposited in the door storage space is discharged. On the other hand, when the water pressure at one end side opening position of the intake pipe is lower than the water pressure at the other end side opening position of the drainage pipe, the flow of the seawater is not generated by the action of the check valve.

  In the present invention, when the opening on the one end side of the intake pipe is provided at a position higher than the seabed provided with the storage portion, surrounding gravel hardly flows from the opening on the one end side of the intake pipe when the seawater flows in. Moreover, when the one end opening of the intake pipe is provided sideways or toward the sea bottom, it is difficult for sediment in the sea area to enter from the one end opening of the intake pipe.

  Further, in the present invention, the fall from the sea area through the upper surface opening of the storage unit into the door body storage space between the surface on the anti-sea area side of the door body in a lying state and the opening on the other end side of the intake pipe. When a semi-permeable member is provided that suppresses the bottom sediment deposited on the floor of the door storage space from moving toward the falling door body side while the bottom sediment in the incoming sea area passes, Discharge can be performed better.

  In the present invention, a check valve is provided in the intake pipe and the drain pipe that form a route that circulates between the sea area and the door storage space. Accumulated sediment can be discharged.

It is the schematic block diagram which showed the 1st example of the undulating gate type breakwater of this invention. (A) (b) is the figure which showed the aspect of the one end side opening of the intake piping which comprises the undulating gate type breakwater of this invention. (A) (b) is the figure which showed an example of the semi-permeable member which comprises the undulating gate type breakwater of this invention. It is the schematic block diagram which showed the 2nd example of the undulating gate type breakwater of this invention.

  The purpose of the present invention is to make it unnecessary for divers to dive and drain the sediment deposited in the door storage space of the storage section, and to provide water intake piping and discharge that form a path that circulates between the sea area and the door storage space. This was realized by providing a check valve in the piping.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
FIG. 1 is a schematic configuration diagram showing a first example of the undulating gate type breakwater of the present invention.

  In FIG. 1, reference numeral 1 denotes a door body constituting a undulating gate type breakwater, which is stored in a lying state in the door body storage space 2 a of the storage unit 2 during normal times. When the occurrence of a storm surge or tsunami is predicted, air is supplied to the air chamber on the distal end side, the distal end side is erected with the rotation shaft 1a on the proximal end side as a fulcrum, and the port entrance is closed.

  The present invention relates to a water intake pipe 3 that flows seawater into the door storage space 2a of the storage section 2 from the sea area 5 in which the storage section 2 is installed, and the seawater that flows through the intake pipe 3 in the undulating gate breakwater. Is a configuration in which a plurality of drainage pipes 4 that are discharged from the door body storage space 2a are provided at predetermined intervals in the width direction of the door body 1.

  The intake pipe 3 has one end opened to the sea area 5, and the other end opened between the floor surface 2 aa and the surface 1 b on the side opposite to the sea area of the door body 1 in a lying state in the door body storage space 2 a. A check valve 6 that allows the movement of seawater only in the direction from the one end side opening 3a to the other end side opening 3b is provided in the middle.

  As shown in FIG. 2, the one end side opening 3 a of the intake pipe 3 is provided with a storage portion 2 as shown in FIG. 2 in order to prevent surrounding gravel from flowing together from the one end side opening 3 a when seawater flows. It is desirable to provide at a position higher than the seabed 5a.

  Moreover, in order to suppress the bottom sediment in the sea area from entering from the one end side opening 3a of the intake pipe 3, the one end side opening 3a is provided toward the side as shown in FIG. As shown in FIG.2 (b), providing toward the seabed 5a is desirable.

  On the other hand, the drainage pipe 4 has one end opened in the door body storage space 2a so as to face the other end side opening 3b of the intake pipe 3, while the other end is opened in the sea area 5, A check valve 7 that allows the movement of seawater only in the direction from the one end side opening 4a to the other end side opening 4b is provided.

  8 passes the bottom sediment 9 falling from the sea area 5 into the door storage space 2a, but the sediment 9 deposited on the floor surface 2aa of the door storage space 2a is placed on the side of the door body 1 in a lying state. It is a semi-permeable member that suppresses movement, and includes the surface 1b on the anti-sea area side of the door body 1 in a lying state and the other end side opening 3b of the intake pipe 3 (one end side opening 4a of the drain pipe 4). Arranged between.

  The configuration of the semi-transmissive member 8 is not limited as long as the above-described operation can be achieved. For example, in FIG. 3 (a), a plurality of angle steels 8a, in FIG. 3 (b), a plurality of materials 8b each having a triangular cross-section, each crest is directed upward, and there is an appropriate gap between each crest. An arrangement in which the distance d is set is shown.

  In the present invention, when the water surface fluctuates due to wind waves, when the depth L1 from the sea surface to the one end side opening 3a of the intake pipe 3 is larger than the depth L2 to the other end side opening 4b of the drainage pipe 4 The seawater flows into the door storage space 2a from the intake pipe 3 due to the difference in water pressure between the two.

  Seawater that has flowed into the door storage space 2a pushes down the sediment 9 deposited on the floor surface 2aa of the door storage space 2a. The swollen sediment 9 flows into the one end side opening 4 a of the drainage pipe 4 by the action of the semi-permeable member 8 and is discharged from the other end side opening 4 b to the sea area 5.

  That is, in the present invention, even if the diver does not dive, the bottom sediment 9 accumulated in the door storage space 2a due to the water surface fluctuation due to the wind wave can be discharged. In addition, when the depth L1 from the sea surface to the one end side opening 3a of the intake pipe 3 is smaller than the depth L2 to the other end side opening 4b of the drain pipe 4, the drain pipe 4 is removed by the action of the check valve 7. Seawater does not flow into the door storage space 2a.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, the installation positions of the check valves 6 and 7 provided in the middle of the intake pipe 3 and the drain pipe 4 are not particularly limited, but considering the ease of maintenance, as shown in FIG. It is desirable to install it at a position that can be accessed by the diver from the storage unit 1.

  Moreover, in the said Example, although the one end side opening 3a of the intake pipe 3 is provided in the position higher than the seabed 5a which provided the storage part 2, and toward the side or the seabed 5a, such arrangement | positioning is carried out. Forming is not an essential requirement.

  Similarly, in the said Example, a semi-permeable member is provided between the surface 1b on the anti-sea area side of the door body 1 in a lying state and the other end side opening 3b of the intake pipe 3 (one end side opening 4a of the drain pipe 4). 8 is disposed, but the semi-transmissive member 8 is not an essential component.

DESCRIPTION OF SYMBOLS 1 Door body 1a Rotating shaft 1b Anti-sea area side surface 2 Storage part 2a Door body storage space 2aa Floor surface 3 Water intake piping 3a One end side opening 3b Other end side opening 4 Drainage piping 4a One end side opening 4b Other end side opening 5 Sea area 5a Seabed 6,7 Check valve 8 Semi-permeable member 9 Bottom sediment

Claims (3)

A undulating gate type breakwater that erects a fallen door body stored in a door body storage space formed in the storage section and closes the port entrance,
One end is open to the sea area, and the other end is a water intake pipe that is open into the door body storage space between the floor surface of the door body storage space and the surface on the side opposite to the sea area of the lying down door body,
A drainage pipe that opens in the door body storage space so that one end faces the other end side opening of the intake pipe, and the other end opens in the sea area;
With
The intake pipe has a check valve that only allows seawater to flow into the door housing space from the sea side, and the drain pipe has a reverse valve that only allows seawater to flow from the door housing space to the sea side. An undulating gate type breakwater characterized by a stop valve.   2. The undulation according to claim 1, wherein an opening on one end side of the intake pipe is provided at a position higher than a seabed on which a storage portion is provided, and the opening on the one end side is provided sideways or toward the seabed. Gate type breakwater.   While the bottom body falling from the sea area into the door body storage space passes between the surface of the door body in the lying state on the side opposite to the sea area and the opening on the other end side of the intake pipe, the door body The undulating gate type breakwater according to claim 1 or 2, further comprising a semi-permeable member that suppresses movement of the sediment deposited on the floor surface of the storage space toward the door body in a lying state.

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