JP2018017052A - Tsunami barrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a cost by enabling construction to be more easily performed.SOLUTION: A tsunami barrier (1) comprises a plurality of supports (2) that are erected on a ground surface, and a screen (3) that is laid between the supports (2) to capture an object swept away by the force of waves. The support has an end support (21) to which a plurality of ends of the screen are connected. At least one of the screens connected to the end support is connected to a surface of the end support via a connector (4).SELECTED DRAWING: Figure 3

Description

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

Tsunami barriers are known that are installed on quay walls, revetments, etc., and prevent tsunamis and storm surges from flowing into the land of ships and drifting objects due to push waves, and pulling waves to the sea from cargoes on the ground. , See Patent Document 1).
The tsunami barrier is provided with, for example, a plurality of support columns standing on the ground and a screen for capturing supported by these support columns. At the same time, the impact can be absorbed. The tsunami barrier is often provided so as to surround the package placement space in order to avoid outflow of the package placed on land.
Since it is difficult to enclose a wide mounting space with one screen, a plurality of screens are used to construct a tsunami barrier. Therefore, an end support column for connecting the end portions of the screen and an intermediate support column that supports the screen between the end support columns are used.
As shown in Patent Document 1, when two screens are connected to one end support column, the height position for connecting the wire ropes constituting the screen is shifted so that the wire ropes do not contact each other It is said that.

JP-A-2006-125211

However, in the tsunami barrier as described above, the inundation depth of the tsunami and storm surge is determined by the height of the upper end of the screen, so one wire rope is not high enough to interfere with the other wire rope. It is necessary to connect to the part support. For this reason, it is necessary to construct the end struts high, and the cost increases.
In addition, since the installation angle formed by the two screens in the end column varies depending on the construction site, the position of the insertion hole of the wire rope formed in the end column must be determined for each end column. Production work is complicated. Also, since the positions of the insertion holes formed in each end column are different, care must be taken not to make a mistake in the installation location and orientation when installing the end columns, which makes the construction complicated and the construction period Is prolonged.

  Then, this invention is made | formed in view of the said subject, and it aims at providing the tsunami barrier which can simplify construction and can reduce cost.

  In order to solve the above-mentioned problems, the present invention is a tsunami barrier comprising a plurality of pillars erected on the ground and a screen that spans between the pillars and captures an object that has been swept away by the force of waves. The column has an end column to which a plurality of ends of the screen are connected, and at least one of the screens connected to the end column is a surface of the end column via a connector. It is connected to.

  Moreover, it is preferable that the upper end part of the screen is connected to the end column at a position where the upper end part is at the same height.

  The connector includes a first connecting part fixed to the end column, a second connecting part fixed to the screen and rotatably connected to the first connecting part. It is preferable that a shaft portion for connecting the first connecting portion and the second connecting portion is provided.

  Moreover, it is preferable that the said 2nd connection part is connected rotatably along the cross-sectional direction of the said edge part support | pillar.

  In addition, the end column is erected on a sloping ground along the vertical direction, the screen is stretched between the end struts along the slant of the sloping ground, and the second connecting portion is connected to the end It is preferable that they are connected so as to be rotatable along the longitudinal section direction of the support columns.

  Further, the screen has a plurality of end portions connected to the end support columns via the connecting tools, respectively, the shaft portions of the connecting tools are integrally formed, and the shaft portions are connected to the end support posts. It is preferable to be provided along the standing direction.

  Moreover, it is preferable that the both ends of the said screen are connected with the surface of the said edge support | pillar via the said connection tool.

  In addition, an intermediate support column is provided between the end support columns and supports the screen. The screen is inserted through the intermediate support column, and the intermediate support column guides the direction of the screen. A guide portion is preferably provided.

  Moreover, it is preferable that the intermediate strut is provided with a guide portion for guiding the insertion of the screen.

  According to the present invention, construction can be simplified and costs can be reduced.

It is a perspective view of a tsunami barrier. It is a front view of the edge part pillar of a tsunami barrier. It is the top view of the tsunami barrier which looked at the support | pillar in cross section. It is the front view which looked at some connectors. It is a top view of a coupling tool. (A) is a front view of a connection metal fitting, (b) is a top view of a connection metal fitting. It is the top view which looked at the support | pillar in the tsunami barrier of another example in cross section. It is the top view which looked at the support | pillar in the tsunami barrier of another example in cross section. It is the top view which looked at the support | pillar in the tsunami barrier of another example in cross section. It is a front view of the edge part support | pillar of the tsunami barrier of another example. It is a front view of the tsunami barrier provided in the slope. It is the front view which looked at some coupling tools in FIG. It is a top view of the coupling tool in FIG.

  A preferred embodiment 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 scope of the present invention.

<Structure of tsunami barrier>
As shown in FIG. 1, the tsunami barrier 1 is provided near the quay of a harbor. The tsunami barrier 1 is provided in a rectangular shape so as to surround a loading space S in which a load C to be loaded on a ship or a load C unloaded from a ship is temporarily placed.
The tsunami barrier 1 does not completely surround the loading space S, but is provided with a gate 11 through which a vehicle passes in order to carry out the temporarily loaded luggage C and carry the luggage into the loading space S. .
As shown in FIGS. 1 to 6, the tsunami barrier 1 includes a plurality of support columns 2, a screen 3, a connector 4, a guide unit 5, and a guide unit 6.

(Support)
The support column 2 is erected along the vertical direction on the ground. The support columns 2 are erected on the ground so as to be aligned on a straight line, and the alignment direction is changed along the way. That is, the part where the arrangement direction changes is the corner of the tsunami barrier 1. As shown in FIG. 1, since the tsunami barrier 1 is formed in a rectangular shape in plan view, the alignment direction of the columns 2 is changed at four places so as to have four corners.
The plurality of support columns 2 are arranged at the corners of the tsunami barrier 1 and support an end support column 21 that supports the end of the screen 3, and an intermediate support column 22 that is disposed between the end support columns 21 and supports the screen 3. There is.
The end struts 21 are used as struts constituting the corners of the tsunami barrier 1 and the struts constituting the gate 11, and all the struts other than the end struts 21 are intermediate struts 22. The support columns 21 are arranged at a predetermined interval.
The end column 21 is configured to be stronger than the intermediate column 22 that supports the middle of the screen 3 so that it can withstand the tension acting on the screen 3. Specifically, the end column 21 is larger in diameter and thicker than the intermediate column 22, and is deeply embedded in a foundation built in the ground by taking an anchor or the like.
Here, the end column 21 is designed so as to absorb the collision energy of the drifting object or the like colliding with the end column 21 by deformation. The intermediate strut 22 is designed to absorb the collision energy of a drifting object or the like colliding with the intermediate strut 22 by deformation, but is reduced by absorbing the collision energy due to the extension of the screen 3. The allowable deformation amount of the intermediate column 22 is that the inclination angle of the axis is 15 °.

A pair of through holes 2 a and 2 b (see FIG. 3) is formed in the support column 2 according to the number of wire ropes 31 constituting the screen 3. For example, as shown in FIG. 2, when there are four wire ropes 31 spanned between the columns 2, four sets of through holes 2a, 2b are formed, that is, a total of eight. The pair of through holes 2a and 2b are formed so that the straight lines are along the ground surface when the centers of both through holes 2a and 2b are connected by straight lines.
As shown in FIGS. 1 to 3, two screens 3 are connected to one end column 21 from two different directions. One screen 3 a is connected to the end column 21 through the through holes 2 a and 2 b, and the other screen 3 b is connected to the surface of the end column 21.

(screen)
Screen 3 is used to prevent the inflow of ships and drifting objects into the land due to the rushing waves from the sea to the land when tsunamis and storm surges occur, and the outflow of luggage in the loading space S to the sea due to pulling waves. It will be a catcher of things to be shed
The screen 3 includes, for example, a plurality of wire ropes 31 supported by the columns 2 arranged side by side.
The wire rope 31a constituting the screen 3a inserted into the end column 21 is inserted into a pair of through holes 2a and 2b formed in each column 2, and is inserted into the pair of through holes 2a and 2b. The extending direction of the wire rope 31a is along the ground surface.
Each wire rope 31a is constructed so that the extending directions thereof are parallel to each other. Since the end column 21 is provided at the corner of the tsunami barrier 1, each wire rope 31a is laid in a straight line without being bent at the corner.
As shown in FIG. 2 and FIG. 3, a bolt portion 71 having a thread formed on the end portion of the wire rope 31 a is provided coaxially with the wire rope 31 a and passes through the end column 21. The wire rope 31 a can be attached to the end column 21 by fastening the bolt portion 71 of the wire rope 31 a with the nut portion 72 via the washer 73.

The wire rope 31b constituting the screen 3b connected to the surface of the end column 21 is connected to the surface of the end column 21 via the connector 4, and the wire rope 31b extends in the connected state. The direction is along the ground surface.
Each wire rope 31b is constructed so that the extending directions thereof are parallel to each other. Since the end column 21 is provided at the corner of the tsunami barrier 1, each wire rope 31b is laid in a straight line without being bent at the corner.
The upper ends of the wire rope 31a of the screen 3a and the wire rope 31b of the screen 3b are spanned at the same height position, and the connection position to the end column 21 is also at the same height.
As shown in FIGS. 1 and 2, both ends of the wire rope 31 are attached to the end column 21. Note that the screen 3 can also be configured by a plurality of wire ropes 31 laid between the columns 2, but when the distance between the adjacent columns 2 is long, in order to prevent the wire rope 31 from slacking, The wire ropes 31 may be connected to each other while maintaining a predetermined interval.

(Connector)
As shown in FIGS. 2 to 6, the connector 4 connects the wire rope 31 b to the end column 21, and includes a locking piece 41 as a first connecting portion and a second connecting portion. A coupling fitting 42 and a fastener 43 as a shaft portion are provided.
The locking piece 41 is a plate material fixed to the end column 21 and is joined to the surface (outer peripheral surface) of the end column 21 by welding. The locking piece 41 is fixed to the end column 21 such that the direction of the main surface thereof is orthogonal to the axial direction (standing direction) of the end column 21. That is, the locking piece 41 is fixed to the end column 21 so that the main surface thereof faces the ground surface. The locking piece 41 is formed with a hole 41a penetrating from one main surface to the other main surface.
One end of the connection fitting 42 is connected to the end of the wire rope 31 b and the other end is connected to the locking piece 41. The other end of the connection fitting 42 is rotatably connected to the locking piece 41 via a fastener 43. In other words, the connecting fitting 42 is connected to be rotatable about the bolt 43 a of the fastener 43 along the cross-sectional direction of the end column 21. As shown in FIG. 6, the connecting fitting 42 is formed so that the other end is bifurcated, and a hole 42 a for allowing the fastener 43 to pass therethrough is formed. These holes 42 a are opposed to each other and have the same axis, and are connected to the locking piece 41 so that the axis is parallel to the axis of the end column 21.
The fastener 43 connects the locking piece 41 and the connection fitting 42, and includes a bolt 43a and a nut 43b. The bolt 43a is formed with a threaded portion only at the tip portion screwed into the nut 43b, and is formed as a columnar column from the head to the threaded portion. The bolt 43a is inserted through the hole 42a of the coupling fitting 42 and the hole 41a of the locking piece 41, and by engaging the nut 43b with the threaded portion of the bolt 43a from the side opposite to the head of the bolt 43a, The stop piece 41 and the connection fitting 42 are connected.
Thereby, when the wire rope 31b is connected to the end column 21, as shown in FIG. 4, the extending direction (axial direction) of the wire rope 31b is the standing direction (axial direction) of the end column 21. Are connected to the end column 21 so as to be orthogonal to the end column 21.

(Guide part)
As shown in FIGS. 2 and 3, the guide unit 5 protects the wire rope 31 so that the wire rope 31 does not contact and damage the support column 2 and the guide unit 6, and guides the direction in which the wire rope 31 extends. Is.
The guide portion 5 is provided in each of the through holes 2 a and 2 b of the end column 21 and the through holes 2 c and 2 d of the intermediate column 22. The guide part 5 is made of, for example, metal, is formed in a substantially cylindrical shape, and is joined to the support column 2 by welding. The guide part 5 has a hole formed along its axial direction, and the wire rope 31 is inserted through this hole. A curved surface is formed at one end of the hole so as to be smoothly curved from the inner surface to the outer surface of the hole. The guide portion 5 is not limited to metal, and may be formed of other materials such as plastic.

(Guidance Department)
As shown in FIGS. 2 and 3, the guide portion 6 is a member that guides the wire rope 31 within the support 2 in order to smoothly pass the wire rope 31 through the support 2. The guide part 6 is formed from a metal tube formed in a tubular shape. The guide portion 6 is provided so as to penetrate both the end column 21 and the intermediate column 22 through the column 2. For example, the guide portion 6 is formed in a cylindrical shape whose axis extends in a straight line. When the guide part 6 is provided on the support column 2, the wire rope 31 is drawn and pulled out along the axial direction of the guide part 6. Guide portions 5 are respectively disposed at both ends of the guide portion 6. Note that the guide portion 6 is not limited to a metal tube, and may be formed of other materials such as plastic.
The guide portion 5 is also joined to both ends of the guide portion 6 by welding, and the guide portion 5 and the guide portion 6 separate the space in the support column 2 from the external space. The inner diameter of the hole of the guide portion 5 and the inner diameter of the guide portion 6 are formed so as to be substantially equal. When the guide portion 5 is joined to the guide portion 6, there is no step on the inner surface.

<Tsunami barrier construction method>
Next, the construction method of the tsunami barrier 1 will be described.
As shown in FIG. 1, when the loading space S partitioned in a rectangular shape is surrounded by the tsunami barrier 1, the tsunami barrier 1 is preferably formed in a rectangular shape.
The struts 2 are installed at predetermined intervals along the boundary of the loading space S. At this time, the end column 21 is installed as a column column of the gate 11 and the corner column column of the tsunami barrier 1, and the intermediate column 22 is installed as the other column.
A guide portion 6 is provided on the end column 21 and the intermediate column 22, and the guide portion 5 is fixed to both ends of the guide portion 6. Further, a locking piece 41 is welded to the surface (outer peripheral surface) of the end column 21 connecting the plurality of screens 3 at a position orthogonal to the extending direction of the guide portion 6 and at the same height as the guide portion 6. Join.

  Next, one end of the wire rope 31 a constituting one screen 3 a is attached to one end column 21, and the other end is passed through the intermediate column 22 in order. After passing the wire rope 31 through all the intermediate struts 22, the other end of the wire rope 31 is attached to the other end strut 21. Here, one end of the wire rope 31 a is passed through the guide portion 6 of the end column 21, and a bolt portion 71 protruding from the end column 21 is fastened with a nut portion 72 via a washer 73, thereby One end of 31 a is connected to the end column 21.

Next, one end of the wire rope 31b constituting the other screen 3b is attached to one end column 21 and the other end is passed through the intermediate column 22 in order. After passing the wire rope 31b through all the intermediate struts 22, the connecting fitting 42 is attached to the other end of the wire rope 31b.
Next, the locking piece 41 is sandwiched between the forked portions of the connecting fitting 42 attached to the other end of the wire rope 31b, the bolt 43a is passed through the hole 42a of the connecting fitting 42 and the hole 41a of the locking piece 41, and the nut 43b. Conclude. As a result, the other end of the wire rope 31 b is connected to the end column 21.
Note that the order of connecting the screen 3a and the screen 3b is arbitrary, and either may be the first, or the connecting work may be performed in parallel.
By performing the above operation for all the wire ropes 31, the screen 3 for capturing drifting objects and luggage is completed.

According to the tsunami barrier 1 having the above configuration, even when the end portions of the plurality of screens 3 are connected to the end column 21, the end portion of one screen 3 a is in the end column 21. The wire rope 31a is inserted and connected to and fixed to the end column 21, and the other end of the screen 3b is connected to and fixed to the surface of the end column 21 with the wire rope 31a. The screens 3a and 3b can be provided at the same height without the 31b interfering with each other. Thereby, it is not necessary to construct the end column 21 high, and it is possible to suppress an increase in cost.
Moreover, since the screens 3a and 3b can be provided at the same height, the positions of the through holes 2a and 2b of the wire rope 31a formed in the end column 21 can be unified at the same height and the same position. As a result, the types of end columns 21 to be manufactured can be reduced, mass production of the end columns 21 is facilitated, construction on the site is facilitated, and the construction period can be shortened.
Moreover, since the wire rope 31b is rotatably connected to the end column 21 via the connector 4, even if there is a slight shift in the installation position of the end column 21 or the intermediate column 22, the shift is not caused. Can be adjusted by the rotation of the connecting fitting 42 with respect to the locking piece 41, so that high-precision positioning is not required and workability is improved.
Moreover, since the wire rope 31b is rotatably connected to the end column 21 via the connector 4, it can be connected to the same end column 21 regardless of the angle formed by the two screens 3. .
Further, since the wire rope 31b is rotatably connected to the end column 21, it can correspond to various shapes (types) of tsunami barriers.
In addition, since the wire rope 31 is connected to the end column 21 using the connector 4, even if the wire rope 31 is deformed when the drifting material is captured, a shear force is applied to the end of the wire rope 31. Does not work.
Further, since the connector 4 has a simple structure using the bolts 43a and the nuts 43b, the attaching / detaching work of the screen 3 to the end column 21 can be easily performed. For this reason, the screen 3 can be removed during normal operation, and the screen 3 can be attached to the support column 2 in a short time when a tsunami occurs, so that the space for loading luggage can be used effectively.
In addition, since a plurality of screens 3 can be connected to one end support column 21, the end support columns 21 can be reduced, and the cost can be reduced.

The tsunami barrier using the connector having the above configuration can be diverted to another form.
<Modification 1>
As shown in FIG. 7, when the loading space S in which the luggage C is temporarily placed has a circular shape, a guide portion 5 provided on the intermediate column 22 using one end column 21 and a plurality of intermediate columns 22. The wire rope 31c may be bent to connect one end and the other end of the screen 3c to the same end column 21. Also in this case, since one end of the wire rope 31c is passed through the end column 21 and the other end is connected to the surface of the end column 21, the wire rope 31c does not overlap, and both ends are at the same height. Now, it can be connected to the end column 21. Further, since the other end of the wire rope 31c is rotatable with respect to the end column 21, even if there is a slight shift in the installation position of the intermediate column 22, the other end of the wire rope 31c is rotated to shift the other. Therefore, it is not necessary to position the support column 2 with high accuracy, and the construction becomes easy.

<Modification 2>
The connector 4 does not necessarily have to be used for all screens, and as shown in FIG. 8, the connector 4 may be attached only to one end of the wire rope 31d in a part of the screen 3d constituting the tsunami barrier. .
Further, as shown in FIG. 9, the connecting tools 4 may be attached to both ends of the wire rope 31 e constituting the screen 3 e, and each connecting tool 4 may be connected to the surface of the end column 21. In this case, it is not necessary to provide the guide part 5 or the guide part 6 on the end column 21.
Thus, since the screens 3d and 3e to which the connecting portion 4 is attached can be easily detached from the end column 21 at the connecting portion, a convenient structure can be used when the vehicle passes by loading and unloading luggage. It is.

<Modification 3>
As shown in FIG. 10, when the screen is composed of a plurality of wire ropes 31f, the bolts of the fasteners 43 of the connectors 4 that connect the wire ropes 31f to the end column 21 are integrally formed. One long bolt 43f may be shared by each connecting portion 4.
In this case, all the couplers 4 are arranged in a straight line along the standing direction of the end column 21, and the bolts 43f are also arranged along the standing direction of the end column 21, and the lower end or the upper end Fastened with nut 43g at the part. The bolt 43f is formed with a threaded portion only at a position where it is screwed with the nut 43g at the tip, and is formed as a columnar column from the head to the threaded portion.
Thus, the joint strength to the end column 21 of the screen can be increased by integrating the shaft portion among the plurality of connectors.

<Modification 4>
As shown in FIGS. 11 to 13, the connector 4 is also effective when a tsunami barrier is provided on an inclined land.
When a tsunami barrier is provided on an inclined land, the end column 21 and the intermediate column 22 are erected on the inclined surface along the vertical direction, and the wire rope 31g of the screen 3g is connected to the end so that the extending direction is along the inclined surface. Connect to the column 21.
Both end portions of the wire rope 31g are coupled to the end column 21 via the coupling tool 4, respectively.
Here, unlike the case shown in FIGS. 4 and 5, the locking piece 41 is welded to the end column 21 so that its main surface is along the standing direction of the end column 21. The bolts 43 a that connect the metal fittings 42 are arranged along the cross-sectional direction of the end column 21. As a result, the connection fitting 42 can rotate around the bolt 43a along the longitudinal cross-sectional direction of the end column 21, and the inclination of the wire rope 31g can be adjusted according to the inclination of the inclined surface.

<Others>
Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from 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 screen with a wire rope attached to the outer edge of the net material. The shapes and structures of the support 2, the connector 4, the guide part 5, and the guide part 6 are also arbitrary and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Tsunami barrier 2 Support | pillar 3 Screen 3a Screen 3b Screen 4 Connection tool 5 Guide part 6 Guide part 21 End part support | pillar 22 Intermediate support | pillar 31 Wire rope 31a Wire rope 31b Wire rope 41 Locking piece (1st connection part)
42 Connecting bracket (second connecting part)
43 Shaft 43a Bolt 43b Nut

Claims (9)

A tsunami barrier comprising a plurality of pillars erected on the ground, and a screen that captures an object that is bridged between the pillars and is swept away by the force of waves,
The strut has an end strut to which a plurality of ends of the screen are connected,
A tsunami barrier, wherein at least one of the screens connected to the end column is connected to the surface of the end column via a connector.   2. The tsunami barrier according to claim 1, wherein the tsunami barrier is connected to the end column at a position where the upper ends of the screen are at the same height. The connector is
A first connecting portion fixed to the end column;
A second connecting portion fixed to the screen and rotatably connected to the first connecting portion;
A shaft portion connecting the first connecting portion and the second connecting portion;
The tsunami barrier according to claim 1, wherein the tsunami barrier is provided.   4. The tsunami barrier according to claim 3, wherein the second connecting portion is rotatably connected along a cross-sectional direction of the end column. The end struts are erected on a sloping ground along a vertical direction, and the screen is bridged between the end struts along a slant of the sloping ground,
4. The tsunami barrier according to claim 3, wherein the second connecting portion is rotatably connected along a longitudinal sectional direction of the end column. 5. The screen has a plurality of ends connected to the end struts via the connectors, respectively.
The tsunami according to any one of claims 3 to 5, wherein the shaft portion of each connector is integrally formed, and the shaft portion is provided along a standing direction of the end column. barrier.   The tsunami barrier according to any one of claims 1 to 6, wherein both end portions of the screen are connected to the surface of the end column through the connector. An intermediate strut that is erected between the end struts and supports the screen;
The screen is inserted through the intermediate strut,
The tsunami barrier according to any one of claims 1 to 7, wherein the intermediate strut is provided with a guide portion for guiding a direction in which the screen is bridged.   The tsunami barrier according to claim 8, wherein a guide portion that guides the insertion of the screen is provided in the intermediate column.

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