JP2016151163A - Gate on river for inhibiting running up of tsunami waves - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate that inhibits running up of tsunami waves on a river even when a flood and tsunami struck at a same time, the gate allowing a necessary cross-sectional area of the river to be secured without increasing the size of a facility and having a tip side of a door body engaged.SOLUTION: A gate 11 for inhibiting running up of tsunami waves on a river is installed on a riverbed that is not covered by water at normal times. The gate includes: a floating body-type flap gate having a door body 14 of which a door tip side rises and swings around a rotary support on a rear edge side, utilizing buoyancy of the door body brought about by water when tsunami waves run up the river; and an attachment/detachment device 20 that attaches/detaches a hook on/from a mooring pin, the hook being engaged with the mooring pin fitted at the tip side of the door body 14. The attachment/detachment device 20 is provided with a backup device 33 that automatically releases an engaged state of the hook to the mooring pin using change of a tsunami wave flow, when the tsunami waves strike while flooding water is being discharged.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a tsunami run-up prevention gate to a river installed on a riverbed that normally has no water in order to prevent a tsunami going up the river.

  For example, it is installed at the opening of a breakwater, and when the water increases, the door body rises and rises by using the buoyancy of the door body itself due to the inflowing water so that the increased water does not flow into the living space and underground space, There is a floating flap gate that blocks the opening (for example, Patent Document 1).

  In order to prevent the tsunami from going up the river when the tsunami occurs, when the floating flap gate is installed on the riverbed, even during a flood flowing from the upstream to the downstream of the river 1, FIG. As shown in a), the door body 2 rises slightly, and the river cross section A necessary for discharging the flood safely decreases.

  Therefore, in order to secure the necessary river cross section, it is necessary to lower the altitude when the floating flap gate is installed on the riverbed, but to keep the top height constant when the flap gate stands. It is necessary to increase the size of the facility by the lowered elevation.

  Therefore, it is conceivable to lock the front end side of the door body 2 so that the door body 2 does not rise during a flood. In this case, as shown in FIG. However, if the force of the tsunami going up is greater than the force of the flood, the tsunami will go up the river 1.

  Moreover, when installing a floating-type flap gate on a wide riverbed, a plurality of doors are used.

  In this case, if each door body is moored individually, a plurality of mooring devices are required, which increases the cost, and there is a problem that each member is congested in a narrow space. On the other hand, if a single mooring device in which the mooring hooks of each door body are connected in series, a mooring force several times that of the door body is required, and a large mooring device is required.

JP 2012-241449 A

  The problem to be solved by the present invention is that when a floating flap gate is installed on a riverbed to prevent a tsunami going up the river, the facility is enlarged to ensure the necessary river cross section. It is necessary.

  In addition, when locking the tip of the door body so that the door body does not rise in the event of a flood, when the flood and tsunami occur at the same time, Is going up the river.

  In addition, when the riverbed is wide and the doors are used in multiple ways, mooring each door individually requires multiple mooring devices, which increases costs, and each member is congested in a narrow space. On the other hand, if one mooring device is formed by connecting the mooring hooks of the door bodies in series, a mooring force that is several times the number of door bodies is required, and a large mooring device is required.

  In order to solve the above problems, the present invention can secure a necessary river cross section without increasing the size of the equipment even when a floating flap gate is installed on a riverbed, and floods and tsunamis occur simultaneously. The first purpose is to prevent the tsunami from going up the river even when the force of the tsunami going up is larger than the power from the flood. In addition, when the riverbed is wide and the door body is formed of a plurality of door body blocks, a large mooring device is not required, and each member is not congested in a narrow space so that the cost is not increased. Was made for the second purpose.

The present invention
In order to prevent the tsunami that runs up the river, it is a tsunami run-up prevention gate that is installed on a riverbed that normally does not have water,
When the tsunami goes up the river, the front end of the floating body of the floating flap gate having a door body whose front end is erected and swung with the rotation support on the rear end side as a fulcrum using the buoyancy of the door body itself by water Attach the mooring pin to the part,
It is a configuration in which a hook that engages with the mooring pin and an attaching / detaching device that attaches / detaches the hook to the mooring pin are arranged,
The attachment / detachment device is provided with a backup device that automatically releases the engagement of the hook with the mooring pin by using a change in flow caused by the tsunami when a tsunami strikes during a flood discharge. Is the most important feature.

  In the above-described present invention, in the normal state of the door body lying down, when the hook is released from the mooring pin attached to the tip of the door body, Without operation, the door body rises and stands up without power, preventing the tsunami from rising. Even if the tsunami goes up beyond the door body 14, the door body falls down and the pulling wave flows downstream when the tsunami goes up.

  On the other hand, when a flood is expected, the door body can be kept lying down by operating the hook attaching / detaching device and engaging the hook with the mooring pin.

  In addition, when a tsunami occurs when a hook is engaged with a mooring pin when a flood is expected, and the force that moves up the tsunami is greater than the force caused by the flood, the hook is temporarily disengaged from the mooring pin. If not, the backup device automatically disengages the hook from the mooring pin to prevent the tsunami from going up.

  In the present invention, when the door body is one in which a plurality of door body blocks are disposed adjacent to each other and side walls are disposed on both sides of the door body in which the plurality of door body blocks are disposed adjacently, Only the hook that engages with the mooring pin of the door block adjacent to the side wall in which the hook attaching / detaching device is disposed is attached / detached. The hook is attached to and detached from a mooring pin that engages with a door block other than the door block adjacent to the side wall disposed adjacent to the side wall in which the hook attaching / detaching device is disposed. This is done with a detachable device. With such a configuration, a large mooring device is not required, each member is not congested in a narrow space, and the cost is not increased.

  In the present invention, if the hook is released from the mooring pin in normal times, the door body can be lifted and raised without power without any artificial operation even if a tsunami suddenly strikes. , To prevent the tsunami from going up. On the other hand, when flooding is expected, the hook body is engaged with the mooring pin, so that the lying state of the door body can be maintained. Therefore, the height of the door can be minimized.

  Also, in the present invention, when a tsunami is generated in a state where a flood is expected and the hook is engaged with the mooring pin, and the force of the tsunami going up is larger than the force caused by the flood, the hook to the mooring pin is temporarily Even if the engagement cannot be released, the backup device automatically releases the engagement of the hook with the anchor pin. Therefore, the tsunami can be prevented from going up.

(A) is the schematic which looked at the tsunami run-up prevention gate to the river of this invention from the plane direction, (b) is AA sectional drawing of (a) figure. It is BB sectional drawing of Fig.1 (a). It is an enlarged view of CC section of Drawing 1 (a). (A) is an enlarged view of the D section of FIG. 3, (b) is an enlarged view of the E section of FIG. 3, and (c) is an enlarged view of the F section of FIG. It is the figure which showed the mooring pin attached to the front-end | tip part of a door body, and the hook engaged with this mooring pin, (a) is the figure seen from the plane, (b) is the figure seen from the side. (A) is sectional drawing of the G section of FIG. 3, (b) is HH sectional drawing of (a) figure. It is a figure explaining attachment and detachment of a hook in normal times. It is a figure explaining attachment and detachment of a hook at the time of the tsunami attack. It is a figure explaining attachment and detachment of a hook at the time of flood. It is a figure explaining attachment and detachment of a hook when a change-over valve operates normally when a tsunami attacks at the time of flood. It is a figure explaining attachment and detachment of a hook when a change-over valve breaks down when a tsunami attacks at the time of flood. It is a figure explaining the problem at the time of flooding when a floating flap gate is installed on a riverbed, (a) when not locking the front end side of the door body, (b) when locking the front end side of the door body It is.

  The present invention can secure a necessary river cross section without enlarging the equipment and prevent flooding in a state where the front end side of the door body is locked when preventing a tsunami that runs up the river. The first purpose is to prevent the tsunami from going up the river even when the tsunami occurs at the same time.

  When the tsunami hits the detachment device during the discharge of the flood, the detachment device that attaches and detaches the hook that engages the mooring pin attached to the tip of the door body to the mooring pin. This was realized by providing a backup function that automatically releases the hook from the mooring pin using the change in flow caused by the attack.

  Further, even when the door body is formed of a plurality of door body blocks, the second object of the present invention is that a large mooring device is not required, each member is not congested in a narrow space, and the cost is not increased. Only attach and detach the hook that engages with the mooring pin of the door block on one side with the hook detaching device, and the detachment of the hook to the mooring pin of the remaining door block is performed by the undulation action of the adjacent door block This was realized by using a second attaching / detaching device to be attached / detached.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
FIGS. 1-6 is a figure explaining the tsunami run-up prevention gate to the river of this invention, FIGS. 7-11 is a figure explaining attachment and detachment of a hook.

  The tsunami run-up prevention gate 11 of the present invention is installed on a river bed 3 without water during normal times. When a tsunami occurs, the tsunami rises when the tsunami runs up the river 1. To prevent going upstream. In addition, 4 in FIG. 1, FIG. 3 shows a dike.

  This tsunami run-up prevention gate 11 is oscillated with the tip side upright with an inner space 13a formed on the surface side of the foundation concrete 13 supported by the foundation pile 12 driven into the river bed 3 with the rotary bearing 14a on the rear end side as a fulcrum. As shown, the door body 14 is disposed (see FIG. 2).

  At that time, the door body 14 is installed so that the rear end side thereof is located upstream of the river 1 and the front end side thereof is located downstream of the river 1, that is, the sea side, and the rotary bearing 14 a on the rear end side is maintained in a watertight state. It is configured as follows.

  When the width of the riverbed 3 to be installed is large, the door body 14 connects a plurality of door body blocks 14b and 14c in a line as shown in FIG. At this time, the adjacent door body blocks 14b, 14c or 14c, 14c are connected to each other while maintaining a watertight state, for example, by a water blocking film 15 as shown in FIGS.

  A side wall 16 is disposed on the river side and a side wall 17 is disposed on the bank side of the door body 14 in which the plurality of door body blocks 14b and 14c are connected in a row, respectively (see FIG. 1). The door body 14 is also configured to maintain a watertight state.

  Reference numeral 18 denotes a mooring pin attached to, for example, the front end surface of the door body 14 (in the example shown in FIG. 3, the door body blocks 14b and 14c) such that the width direction of the door body 14 is the axial direction. The hook 19 installed in the internal space 13a is pressed against the mooring pin 18 to maintain the door body 14 in a lying state (see FIG. 5).

  For example, the hook 19 is attached to the internal space 13a so that the base end side, which is heavier than the distal end side by attaching a weight 19a, can be rotated in a vertical plane by a pin 19b. And the tip end side of the hook 19 is pressed against the mooring pin 18 or released from the mooring pin 18 by the attaching / detaching device 20 disposed in the machine room 17a inside the side wall 17 on the bank side.

  In the case of the door body 14 in which the plurality of door body blocks 14b and 14c shown in FIG. 3 are connected in a line, the hook 19 attachment / detachment device 20 is, for example, the mooring of the door body block 14b adjacent to the side wall 17 on the bank side. Only the hook 19 that engages with the pin 18 is attached and detached (see FIGS. 4A and 6A).

  The configuration of the detachable device 20 is not particularly limited as long as the tip end side of the hook 19 can be pressed against the mooring pin 18 or the pressing to the mooring pin 18 can be released.

  For example, in the embodiment shown in FIG. 3, FIG. 4 (a), and FIG. 6 (a), one end is connected to the machine chamber 17a and the other end is hooked by the withdrawal and withdrawal of the rod of the hydraulic cylinder 21 installed in the machine chamber 17a. The ropes 22 respectively fixed to the central portion of 19 are fed out or wound up through turning pulleys 23 to 25.

  The turning pulley 23 is attached to the rod end of the hydraulic cylinder 21. Further, the turning pulleys 24 and 25 are installed on the floor portion of the inner space 13a on the front end side of the door body 14, the turning pulley 24 is installed near the side wall 17, and the turning pulley 25 is installed below the hook 19. ing.

  The rod of the hydraulic cylinder 21 is moved in and out by supplying and discharging oil sent from the hydraulic unit 26. For example, as shown in FIGS. 7 to 11, the hydraulic unit 26 flows in the middle of an oil tank 26 b that stores oil 26 a and pipes 26 c and 26 d that guide the oil 26 a stored in the oil tank 26 b to the hydraulic cylinder 21. In this configuration, a path switching valve 26e is provided. Reference numeral 26f denotes a hydraulic pump.

  On the other hand, the second attachment / detachment device 27 presses or releases the hooks 19 to the anchoring pins 18 of the door block 14c other than the door block 14b adjacent to the side wall 17 on the bank side.

  This 2nd attachment / detachment apparatus 27 is the structure which remove | desorbs sequentially by the raising / lowering operation | movement of the adjacent door body block 14b or 14c.

  For example, in the embodiment shown in FIG. 3, FIG. 4 (b), and FIG. 4 (c), at the position on the side wall 17 side of the door body block 14b or 14c in the floor portion on the front end side of the door body 14 of the internal space 13a. A lever 28 that supports the central portion is installed so as to be rotatable in a vertical plane parallel to the front end surface of the door body 14.

  One end of a rope 29 is fixed to one end of the lever 28, and the other end of the rope 29 is attached to a central portion of the hook 19 via turning pulleys 30 and 31. On the other hand, a roller 32 is rotatably attached to the other end of the lever 28, and the door block 14c is brought into contact with the side surface 14ba or 14ca of the door block 14b or 14c adjacent to the side wall 17 side. The hook 19 is pressed against the mooring pin 18.

  That is, in the tsunami run-up prevention gate 11 of the present invention configured as described above, the switching valve 26e is normally controlled to the neutral position (both solenoids a and b are off), and the hydraulic pressure of the hydraulic cylinder 21 is changed to the cap side 21a and the head. Both the side 21b passes through the oil tank 26b, the piston 21c moves to the cap side 21a and the rod 21d is retracted (see FIG. 7), and the door block 14b adjacent to the side wall 17 on the levee side is moored. The door body 14 is laid down in a state where the pressing of the hook 19 by the attaching / detaching device 20 to the pin 18 is released.

  Incidentally, 26g is a double pilot check valve provided between the switching valve 26e and the hydraulic cylinder 21. This double pilot check valve 26g is provided in a pilot check valve 26ga provided in a pipe 26c extending from the switching valve 26e to the cap side 21a of the hydraulic cylinder 21, and in a pipe 26d extending from the switching valve 26e to the head side 21b of the hydraulic cylinder 21. It consists of a pilot check valve 26gb.

  In this state, the door body blocks 14c other than the door body block 14b adjacent to the side wall 17 on the bank side are pressed by the rollers 32 of the second attachment / detachment device 27 on the door body blocks 14b or 14c adjacent to the side wall 17 side. Thus, one end of each lever 28 is in the upper position, and each hook 19 presses each mooring pin 18 to maintain the lying state.

  If a tsunami occurs in the state of FIG. 7 and buoyancy acts on the door body 14 due to the tsunami that has run up the river 1, the door body block 14b adjacent to the side wall 17 on the embankment starts to rise, and this door body Due to the rise of the block 14b, the adjacent door block 14c starts to rise in order to prevent the tsunami from rising. When this tsunami strikes, as shown in FIG. 8, the switching valve 26e is in a neutral position (both solenoids a and b are off), and the piston 21c of the hydraulic cylinder 21 is in a position where the rod 21d is retracted. doing. Even if the tsunami goes up beyond the door body 14, when the tsunami goes up, the door body 14 falls down due to the tsunami and the pulling wave flows downstream.

  On the other hand, when a flood is predicted in the state of FIG. 7, the switching valve 26e is controlled to the forward flow position as shown in FIG. 9, and the rod 21d protrudes from the position of the piston 21c of the hydraulic cylinder 21. The hook 19 of the door block 14b is pressed against the mooring pin 18. The door block 14c is in a state in which the mooring pin 18 is pressed by the hook 19 by the second attaching / detaching device 27 as in the normal state.

  When the position of the piston 21c of the hydraulic cylinder 21 reaches a position where the rod 21d reaches the protrusion limit, the return of the oil 26a to the oil tank 26b is blocked by the pilot check valve 26gb, and the operation of the hydraulic pump 26f is stopped. 26e is de-energized and positioned neutral (solenoids a and b are both off). In this state, the piston 21c of the hydraulic cylinder 21 is in a position where the rod 21d is kept in the protruding limit state.

  When a flood occurs in the above state, the door block 14b adjacent to the side wall 17 on the levee side in a lying state is prevented from standing by pressing the hook 19 against the mooring pin 18 by the attaching / detaching device 20, The door body 14 does not float and the river cross section does not decrease.

  In the state shown in FIG. 9, when a flood and a tsunami occur at the same time, as shown in FIG. 10, the switching valve 26e is controlled to the reverse flow position, and the rod 21 retracts from the piston 21c of the hydraulic cylinder 21. The tsunami is prevented from going up as a state in which the pressing of the mooring pin 18 by the hook 19 of the door block 14b is released. The door block 14c is in a state in which the mooring pin 18 is pressed by the hook 19 by the second attaching / detaching device 27 as in the normal state.

  When the position of the piston 21c of the hydraulic cylinder 21 reaches a position where the rod 21d reaches the retreat limit, the return of the oil 26a to the oil tank 26b is blocked by the pilot check valve 28ga, and the operation of the hydraulic pump 26f is stopped and switched. The excitation to the valve 26e is stopped and the valve 26e is neutral (both solenoids a and b are off). In this state, the piston 21c of the hydraulic cylinder 21 is in a position where the rod 21d remains in the retreat limit state.

  However, in the unlikely event that the remote operation of the switching valve 26e is disabled due to the tsunami generated in the state of FIG. 9, it is impossible to prevent the tsunami from going up.

  Therefore, in the present invention, even when the backup device 33 is provided in the attachment / detachment device 20 and the switching valve 26e cannot be remotely operated, the hook 19 of the door block 14b is used by using the flow change caused by the tsunami. The engagement with the mooring pin 18 is automatically released. Incidentally, when the remote control of the switching valve 26e is disabled, the solenoids a and b are both turned off.

  The backup device 33 is, for example, provided with a backup valve 33 a in the middle of a pipe 26 c that connects the hydraulic cylinder 21 and a hydraulic unit 26 that supplies hydraulic pressure to the hydraulic cylinder 21.

  When the switching valve 26e cannot be remotely operated, the backup valve 33a is backed up by the rotation of the pressure receiving plate 33b attached at a position that does not interfere with the up-and-down swinging of the door body 14b adjacent to the side wall 17 on the bank side. From the closed state to the open state against the biasing force of the spring 33c of the valve 33a. In addition, if the installation position of the pressure receiving plate 33b is a position in the vicinity of the bottom of the river 1 that does not interfere with the ups and downs of the door body 14b, the river 1 provided on the side wall 17 on the bank side is also downstream of the door body 14b. It may be inside a hole penetrating from downstream to upstream.

  The pressure receiving plate 33b supports the upper end portion so as to be freely rotatable, and the shaft 33d serving as a peristaltic shaft is provided in the dredging hole 17b communicating with the machine chamber 17a so that the lower end side can freely swing in the flow direction of the river 1. It penetrates.

  A torque arm 33e is attached to a portion of the shaft 33d that penetrates the shaft hole 17b, and a rope 33f is connected to the tip of the torque arm 33e. The rope 33f is connected at one end to the other end of a link arm 33i rotatably attached to a fulcrum base 33h provided in the machine chamber 17a, and the link arm 33i presses the backup valve 33a downward. In the present embodiment, a rod 33j is projected from the upper portion of the backup valve 33a, and the backup valve 33a is pressed through the rod 33i.

  In the backup device 33 configured as described above, the pressure receiving plate 33b rotates when the tsunami strikes, and the link arm 33i descends on the other end side with its one end side as a fulcrum, against the spring 33c of the backup valve 33a. The backup valve 33a is pushed down to change from the closed state to the open state (see FIGS. 7, 10, and 11).

  When the backup valve 33a changes from the closed state to the open state, the oil 26a on the cap side 21a of the hydraulic cylinder 21 flows into the backup oil tank 33g, the piston 21c retreats by its own weight, and the hook 19 is pressed against the mooring pin 18. Is released (see FIG. 11).

  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, in the above-described embodiment, the case of the door body 14 in which a plurality of door body blocks 14b and 14c are connected in a row has been described. However, when the width of the riverbed is narrow and only one door body block may be used, the second attachment / detachment is performed. Needless to say, the device 27 is unnecessary.

  Moreover, the 2nd attachment / detachment apparatus 27 can also be applied not only to the tsunami run-up prevention gate installed in a riverbed but to the flap gate installed in the seabed. When applied to a flap gate installed on the seabed, only the second attaching / detaching device 27 can be used as a mooring device.

DESCRIPTION OF SYMBOLS 1 River 3 River bed 11 Tsunami run-up prevention gate 14 Door body 14a Rotation bearing 14b, 14c Door body block 18 Mooring pin 19 Hook 20 Detachment device 21 Hydraulic cylinder 27 Second attachment / detachment device 33 Backup device 33b Pressure receiving plate

Claims (3)

In order to prevent the tsunami that runs up the river, it is a tsunami run-up prevention gate that is installed on a riverbed that normally does not have water,
When the tsunami goes up the river, the front end of the floating body of the floating flap gate having a door body whose front end is erected and swung with the rotation support on the rear end side as a fulcrum using the buoyancy of the door body itself by water Attach the mooring pin to the part,
It is a configuration in which a hook that engages with the mooring pin and an attaching / detaching device that attaches / detaches the hook to the mooring pin are arranged,
The attachment / detachment device is provided with a backup device that automatically releases the engagement of the hook with the mooring pin by using a change in flow caused by the tsunami when a tsunami strikes during a flood discharge. Tsunami run-up prevention gate to the river, which is characterized by When the door body of the floating flap gate is arranged with a plurality of door blocks adjacent to each other and side walls on both sides sandwiching the door with a plurality of door blocks arranged adjacently,
With the hook attachment / detachment device, only the hook that engages with the mooring pin of the door block adjacent to the side wall in which the hook attachment / detachment device is disposed is attached and detached.
The hook is attached to and detached from a mooring pin that engages with a door body block other than the door body block adjacent to the side wall disposed adjacent to the side wall in which the hook attaching / detaching device is disposed. The tsunami run-up prevention gate to the river according to claim 1, wherein the gate is a tsunami run-up prevention gate.   The backup device of the hook attachment / detachment device is a hydraulic circuit of the hook attachment / detachment device in which the pressure receiving plate swings due to a change in the water flow direction when the force of the tsunami going up is larger than the force caused by the flood, and is normally closed. The tsunami run-up prevention gate to the river according to claim 1 or 2, wherein the back-up valve provided on the tsunami is opened to automatically disengage the hook from the engagement pin.

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