JP6534823B2 - Tsunami barrier - Google Patents

Description

  The present invention relates to a tsunami barrier that captures drifting objects and the like when a tsunami or storm surge occurs.

Tsunami barriers are known that are provided on quaywalls, revetments, etc. to prevent the inflow of ships and drifting objects into the land due to pushing waves when tsunamis and storm surges occur, and the outflow of luggage on the ground into the sea due to pulling waves (for example, , Patent Document 1).
The tsunami barrier includes, for example, a plurality of columns erected on the ground, and capture screens supported by the columns, and the columns and screens prevent the inflow of drifting materials and the like, and the outflow of luggage. , Can absorb shock.
A tsunami barrier is often provided so as to surround the periphery of the loading space of the load in order to avoid the outflow of the load placed on the land.
When the package is surrounded by the tsunami barrier, it is necessary to change the direction in which the screen is erected at an intermediate post on the way. In particular, in the case of installing the tsunami barrier in a rectangular shape in accordance with the shape of the mounting space, it is necessary to bend the screen almost at right angles at its corners, so that the screen contacts the support and load is repeatedly applied. It is gradually damaged and eventually breaks.
Therefore, if there is a place that greatly changes the installation direction of the screen, as in the corner of the tsunami barrier, as shown in FIG. 14 and FIG. It was configured to start construction with another screen 101. Thereby, even if the tsunami barrier 100 has corners, breaking of the screen 101 is avoided by combining a plurality of linear fences.

JP, 2013-19698, A

  However, when the installation of the screen 101 is finished at the corner of the tsunami barrier 100, two ends are formed for one corner, so a gap is formed between the end support 102 supporting the end of the screen 101. I will. In addition, since the end support 102 needs to receive all the tension applied to the screen 101, the end support 102 needs to be stronger than the intermediate support 103 in the other middle part in the structure, and the material and the construction cost increase. was there. Therefore, there has been a demand to reduce the number of end struts 101 of the tsunami barrier 100 as much as possible.

  Therefore, the present invention has been made in view of the above problems, and it is possible to eliminate the gap of the screen between the end support columns and to minimize the number of end support columns as well as the number of corner portions changing the installation direction of the screen. To provide a tsunami barrier that can be

  In order to solve the above problems, the present invention is a tsunami barrier comprising a plurality of columns erected on a foundation and a screen bridged between the columns, wherein at least a part of the columns is the screen It is characterized in that a guide portion which changes the direction of bridging is provided.

  In addition, the plurality of columns may include at least two end columns supporting the ends of the screen, and an intermediate column disposed between the end columns and supporting the screen, wherein the guide unit includes: It is preferable to be provided in the said intermediate | middle support | pillar.

  Preferably, the guide portion includes a pedestal provided on a side surface of the intermediate support, and a support portion provided on the pedestal and slidably supporting the screen.

  Further, the support portion includes: a shaft portion provided upright on the pedestal; and a cylindrical portion which has the shaft portion inserted and is rotatable on the shaft portion and whose outer surface can slide the screen. Is preferred.

  Preferably, the support portion is provided on both the lead-in side and the lead-out side of the screen in the pedestal.

  Further, it is preferable that two supporting portions are provided on each of the lead-in side and the drawing-out side of the screen in the pedestal, and the screen is passed between the supporting portions on each side.

  Further, it is preferable that the screen has a wire rope, is provided so as to penetrate the inside of the column, and includes a linearly formed tube, and the wire rope is passed through the tube.

  Moreover, the receiving member which has a curved surface formed so that it might be curved toward the outer surface side from the inner surface side of the said tube material is provided in the both ends of the said tube material.

  According to the present invention, the gap of the screen between the end columns can be eliminated, and the number of the end columns can be minimized without limiting to the number of corners changing the installation direction of the screen.

It is a perspective view of a quay provided with a tsunami barrier surrounding a package. It is a top view of a tsunami barrier. It is a perspective view of the corner of a tsunami barrier. It is the perspective view which expanded a part of end part support column. It is a perspective view which shows the structure of the edge part of a screen. It is a front view of an intermediate support provided with a guide part. It is a side view of an intermediate support provided with a guide part. It is a top view of the guide part seen from the AA direction in FIG. It is a top view of the corner part of the tsunami barrier in which the screen was constructed. It is a front view of the intermediate | middle support | pillar in which the guide part in 2nd Embodiment was provided. It is a side view of the middle support pillar in which the guide part in a 2nd embodiment was provided. It is a top view of the guide part seen from the BB direction in FIG. It is a top view of a corner of a tsunami barrier in which the screen in a 2nd embodiment was built. It is a top view of the conventional tsunami barrier. It is a top view which shows the structure of the corner | angular part of the conventional tsunami barrier.

  Preferred embodiments of the present invention will be described with reference to the drawings. In addition, embodiment shown below is one illustration and can take various embodiment in the range of the present invention.

First Embodiment
<Configuration of Tsunami Barrier>
FIGS. 1 to 3 are diagrams for explaining a tsunami barrier, and FIGS. 4 to 6 are diagrams for explaining a guide portion provided in the tsunami barrier.
As shown to FIG. 1, FIG. 2, the tsunami barrier 1 is provided near the wharf of the port. The tsunami barrier 1 is provided so as to rectangularly surround a loading space S for temporarily placing a load C loaded on the ship or a load C unloaded from the ship.
The tsunami barrier 1 does not completely surround the loading space S, and there is provided a gate 11 through which the vehicle passes in order to carry out the temporarily placed load C or to load the load into the loading space S. .
The tsunami barrier 1 includes a plurality of columns 2, a screen 3, a guide 4, and a tube 5.

(Support)
A plurality of columns 2 are erected on the ground to be a foundation. The columns 2 are erected on the ground so as to line up on a straight line, and the line direction is changed along the way. That is, the place where the alignment direction changes is the corner of the tsunami barrier 1. Since the tsunami barrier 1 is formed in a rectangular shape, the alignment direction of the columns 2 is changed at four places so as to have four corners.
The plurality of columns 2 include an end column 21 supporting the end of the screen 3 and an intermediate column 22 disposed between the end columns 21 and supporting the screen 3.
The end struts 21 are used as the struts constituting the gate 11, and all the struts other than the end struts 21 are the intermediate struts 22 and are disposed at predetermined intervals between the end struts 21. There is.
The end support 21 is configured to be stronger than the intermediate support 22 supporting the middle of the screen 3 so as to withstand tension or the like acting on the screen 3. Specifically, the end struts 21 are larger in diameter and thicker than the intermediate struts 22 and are deeply embedded in the ground with anchors and the like.
Here, the end support 21 is designed to absorb the impact energy of a drifting object or the like that has collided with the end support 21 by deformation. The intermediate column 22 is designed to absorb impact energy such as a drifting object that collides with the intermediate column 22 by deformation, but is mitigated by absorption of the collision energy by the extension of the screen 3. The allowable deformation of the intermediate column 22 is such that the inclination angle of the axis is 15 °.

(screen)
Screen 3 is used to prevent the influx of ships and drifting objects into the land due to push waves that rush from the sea to land during tsunami and storm surges, and the outflow of cargo in the loading space S due to pulling waves into the ocean. It becomes the capture body of the thing to be washed away.
The screen 3 includes, for example, a plurality of wire ropes 31 passed through the columns 2 arranged in a row. Each wire rope 31 is inserted through the pipe material 5 provided in each support 2 along the horizontal direction orthogonal to the axial direction of each support 2. The respective wire ropes 31 are constructed such that the extending directions thereof are parallel to each other, and the installation directions of the intermediate struts 22 which are the corner portions of the tsunami barrier 1 are changed. As shown in FIG. 1 and FIG. 2, when the tsunami barrier 1 is provided in a rectangular shape, the wire rope 31 is bent approximately 90 degrees at the corner.
As shown in FIG. 4, both ends of the wire rope 31 are attached to the end support 21. As shown in FIG. 5, at the end of the wire rope 31, a bolt 32 formed with a screw thread is provided coaxially with the wire rope 31, and the wire rope 31 passing through the inside of the end support 21 is The wire rope 31 can be attached to the end post 21 by fastening the bolt 32 with the washer 33 and the nut 34.
Here, the screen 3 can also be constituted by a plurality of wire ropes 31 installed between the columns 2, but in the case where the distance between the adjacent columns 2 is long, in order to prevent the slack of the wire ropes 31. The wire ropes 31 may be connected while maintaining a predetermined interval.

(Guide section)
As shown in FIG. 3 and FIG. 6 to FIG. 9, the guide portion 4 guides the wire rope 31 so that the wire rope 31 does not contact and damage the intermediate support 22 at the corner of the tsunami barrier 1 .
The guide portion 4 is provided on an intermediate support 22 at the corner of the tsunami barrier 1. The guide part 4 is provided in the intermediate support 22 according to the height at which each wire rope 31 is installed.
The guide portion 4 includes a pedestal 41 and a support portion 42.
The pedestal 41 is fixed by welding or the like to the side surface of the intermediate support 22 which is a corner. The pedestals 41 are provided on both the lead-in side and the lead-out side of the wire rope 31 in the middle support column 22 which is a corner. In other words, the pedestal 41 is provided at a position facing the center of the intermediate support 22.
The pedestal 41 has two plate members 41 a and 41 b arranged in parallel with each other at a predetermined interval in the axial direction of the intermediate support column 22. The plate members 41a and 41b are formed of, for example, steel plates. A support portion 42 is provided between the two plate members 41a and 41b.
The support portion 42 slidably supports the wire rope 31 to change the installation direction of the wire rope 31. Two support portions 42 are provided side by side in each of the pedestals 41 so as to sandwich the lead-in path or the lead-out path of the wire rope 31.
The supporting portion 42 has a shaft portion 42 a of which one end is fixed to one plate member 41 a of the pedestal 41 and the other end is fixed to the other plate member 41 b of the pedestal 41, and the shaft portion 42 a is inserted and coaxial with the shaft portion 42 a The cylindrical portion 42b is disposed on the upper side and is rotatable with respect to the shaft portion 42a, and the outer peripheral surface thereof can slide the wire rope 31.
The shaft portion 42a is, for example, a cylindrical body formed of a steel material, and is fixed to the plate members 41a and 41b by welding.
The cylindrical portion 42b is made of, for example, a relatively soft material such as resin, and is a cylindrical body rotatable around the shaft portion 42a, so that tension around the wire rope 31 facilitates rotation of the shaft portion 42a. By rotating and moving the wire rope 31, the force is not concentrated on the support portion 42.

(Pipe material)
As shown in FIGS. 6 to 9, the pipe member 5 is provided in both the end support 21 and the intermediate support 22 so as to penetrate the support 2. The tube member 5 is formed in a cylindrical shape in which the axis line extends in a straight line. At both ends of the tube 5, a receiving member 51 having a smooth curved surface that curves from the inner surface to the outer surface of the tube 5 is provided. The reason why the receiving member 51 is provided is to prevent damage due to the wire rope 31 to be inserted coming into contact with the corners of both ends of the pipe member 5. The receiving member 51 may be formed integrally with the tube 5, and both ends of the tube 5 may be formed in a curved shape from the inner surface to the outer surface.
When the pipe 5 is provided on the column 2, the wire rope 31 is drawn in and pulled out along the axial direction of the pipe 5, and the pipe 5 is provided between the two support portions 42 provided on each pedestal 41. The guide part 4 and the pipe material 5 are arrange | positioned so that the axis line of may pass.

<Construction method of tsunami barrier>
Next, the construction method of the tsunami barrier 1 will be described.
As shown in FIG. 1 and FIG. 2, when the loading space S partitioned in a rectangular shape is surrounded by the tsunami barrier 1, it is preferable to form the tsunami barrier 1 in a rectangular shape.
The columns 2 are installed at predetermined intervals along the boundary of the loading space S. At this time, the end support 21 is installed as a support of the gate 11 which is the end of the wire rope 31, and the intermediate support 22 is installed as the other support.
The pipe 5 is inserted through the end support 21 and the intermediate support 22, and the receiving members 51 are attached to both ends of the pipe 5. Further, the guide portion 4 is attached to the intermediate support 22 disposed at a position to be a corner of the tsunami barrier 1.
Next, one end of the wire rope 31 is attached to one end support 21, and the other end is sequentially passed through the intermediate support 22. Here, when the wire rope 31 is passed through the corner of the tsunami barrier 1, the wire rope 31 is passed between the two support portions 42 on the lead-in side, and then the wire rope 31 is passed through the tube 5. The wire rope 31 pulled out is passed between the two supports 42 on the withdrawal side. After passing the wire rope 31 through all the middle columns 22, the other end of the wire rope 31 is attached to the other end column 21.
By performing the above-described operation for all the wire ropes 31, the screen 3 for catching drifting objects and luggage is completed.

<Action, effect>
According to the tsunami barrier 1 having the configuration as described above, the wire rope 31 does not directly contact the intermediate support column 22 by providing the guide section 4 on the intermediate support column 22 serving as the corner, so tension was applied. In this case, the wire rope 31 can be prevented from being damaged. In addition, rotation of the cylindrical portion 42b of the support portion 42 of the guide portion 4 can eliminate friction with the support portion 42 due to the movement of the wire rope 31 when tension is applied, by rotation of the cylindrical portion 42b. 31 damage can be prevented. Therefore, since the wire rope 31 can be bent and supported by the support portion 42 at the corner of the tsunami barrier 1, as in the prior art, each time the installation direction of the wire rope 31 is changed, the end support at the corner It is not necessary to provide 21 and secure the wire rope 31 to the end post 21. As a result, as is clear from the comparison between FIG. 2 and FIG. 10, the number of posts 2 at the corners of the tsunami barrier 1 can be reduced, and the end posts require more labor and cost than the intermediate posts 22. Since the number of 21 can be reduced, the construction process can be shortened and the cost can be reduced. Moreover, since the location in which the wire rope 31 is not constructed can be eliminated between the end support columns 21 at the corner, the inflow and outflow of the load to the tsunami barrier 1 can be prevented.
Further, since the support portion 42 is sandwiched by the pedestals 41, the wire rope 31 does not come off the support portion 42.
Further, since the guide portion 4 and the pipe member 5 are disposed such that the axis of the pipe member 5 passes between the two supporting portions 42 provided on each pedestal 41, the wire rope 31 is linearly formed on the intermediate support column 22. The wire rope 31 can be inserted and the installation work of the wire rope 31 becomes easy.
In addition, by providing the receiving members 51 at both ends of the pipe 5, damage caused by point contact between the pipe 5 and the wire rope 31 can be prevented.

Second Embodiment
Next, a second embodiment of the present invention will be described. The second embodiment is different from the first embodiment in the structure of the guide portion, so the guide portion will be described below, and the same components as those of the first embodiment are denoted by the same reference numerals and descriptions I omit it.
In the present embodiment, the wire rope 31 is supported by the guide portion 4A inside the intermediate column 22 instead of being inserted through the tube member 5 into the intermediate column 22 disposed at the corner of the tsunami barrier 1 Adopt a configuration.

(Guide section)
As shown in FIGS. 10 to 13, the guide portion 4 </ b> A guides the wire rope 31 so that the wire rope 31 does not contact and damage the intermediate support 22 at the corner of the tsunami barrier 1.
The guide portion 4A is provided on the middle support column 22 at the corner of the tsunami barrier 1. The guide portion 4A is provided on the intermediate support column 22 in accordance with the height at which each wire rope 31 is installed.
The guide portion 4A includes a pedestal 41 and a support portion 42.
The pedestal 41 is fixed by welding or the like to the side surface of the intermediate support 22 which is a corner. The pedestal 41 is provided on the intermediate support 22 so as to extend from the intermediate support 22 at the corner toward the inside of the tsunami barrier 1.
The pedestal 41 has two plate members 41 a and 41 b arranged in parallel with each other at a predetermined interval in the axial direction of the intermediate support column 22. The plate members 41a and 41b are formed of, for example, steel plates. A support portion 42 is provided between the two plate members 41a and 41b.
The support portion 42 slidably supports the wire rope 31 to change the installation direction of the wire rope 31. The two support portions 42 are provided side by side in the pedestal 41 so as to sandwich the wire rope 31. The two support portions 42 are arranged such that their axes are aligned with the axis of the middle support column 22. That is, the two support portions 42 are arranged such that the alignment direction is along the extending direction of the pedestals 41, and the wire rope 31 is passed between the two support portions 42.
The supporting portion 42 has a shaft portion 42 a of which one end is fixed to one plate member 41 a of the pedestal 41 and the other end is fixed to the other plate member 41 b of the pedestal 41, and the shaft portion 42 a is inserted and coaxial with the shaft portion 42 a The cylindrical portion 42b is disposed on the upper side and is rotatable with respect to the shaft portion 42a, and the outer peripheral surface thereof can slide the wire rope 31.
The shaft portion 42a is, for example, a cylindrical body formed of a steel material, and is fixed to the plate members 41a and 41b by welding.
The cylindrical portion 42b is made of, for example, a relatively soft material such as resin, and is a cylindrical body rotatable around the shaft portion 42a, so that tension around the wire rope 31 facilitates rotation of the shaft portion 42a. By rotating and moving the wire rope 31, the force is not concentrated on the support portion 42.
Also in the guide portion 4A having such a configuration, the wire rope 31 does not come into direct contact with the intermediate column 22, so that the wire rope 31 can be prevented from being damaged when tension is applied.

<Others>
In addition, this invention is not limited to the said embodiment, It can change suitably in the range which does not exceed the scope of the present invention. For example, the screen 3 is not limited to the plurality of wire ropes 31 but may be a wire rope attached to the outer edge of the mesh material. The shape of the support 2 and the shape of the tube 5 are also arbitrary, and design changes can be made as long as the effects of the present invention can be obtained.

Reference Signs List 1 tsunami barrier 2 support 3 screen 4 guide 5 tube 21 end support 22 intermediate support 31 wire rope 41 pedestal 41a plate 41b plate 42 support portion 42a shaft portion 42b tube portion

Claims (8)

A tsunami barrier comprising: a plurality of columns erected on a foundation; and a screen that is bridged between the columns and captures an object that has been swept away by the force of a wave,
At least some of the support columns are provided with a guide portion that changes the direction in which the screen is bridged ,
The guide unit is
A tsunami barrier comprising: a rotatable support portion extending along the height direction of at least a part of the columns, sandwiching the screen, and slidably supporting the screen . The plurality of columns comprises at least two end columns supporting the ends of the screen, and an intermediate column disposed between the end columns and supporting the screen.
The said barrier part is provided in the said intermediate | middle support | pillar, The tsunami barrier of Claim 1 characterized by the above-mentioned. The guide unit is
A pedestal provided on the side of the intermediate support;
A support provided on the pedestal;
The tsunami barrier according to claim 2, comprising: The support portion is
An axial portion erected on the pedestal;
The shaft portion is inserted and made rotatable on the shaft portion, and a cylindrical portion capable of sliding the screen on an outer surface;
The tsunami barrier according to claim 3, comprising:   The tsunami barrier according to claim 3 or 4, wherein the support portion is provided on both the lead-in side and the draw-out side of the screen in the pedestal.   The supporting portion is provided two each on the lead-in side and the drawing-out side of the screen in the pedestal, and the screen is passed between the supporting portions on each side. Tsunami barrier described in. The screen comprises a wire rope,
Provided so as to penetrate the said end struts and in the intermediate pillar, the comprises a linearly formed the tube, claim 2, characterized in that the wire rope is threaded through the tube member until 6 Tsunami barrier according to any one of the preceding claims.   The tsunami barrier according to claim 7, wherein receiving members having curved surfaces formed to be curved from the inner surface side to the outer surface side of the pipe material are provided at both end portions of the pipe material.

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