JP2018025007A - Columnar support structure and tsunami barrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly construct and dismantle a columnar support structure.SOLUTION: A columnar support structure (3) for capturing substances flowing in by a wave force, and erected on the ground face with a prescribed interval in a Tsunami barrier comprises: a columnar support foundation part (33) which is embedded into the ground at one end part; and a columnar support main body part (37) which is connected to the columnar support foundation part (33) in series thereto, and extends toward the ground. The columnar support foundation part (33) has a foundation-side protrusion protruded toward the outside at an outer face of the other end part facing the columnar support main body part (37), the columnar support main body part (37) has a main body-side protrusion protruded toward the outside at an outer face of an end part facing the columnar support foundation part (33), and the columnar support foundation part (33) and the columnar support main body part (37) are separably connected to each other via the foundation-side protrusion and the main body-side protrusion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a support structure over which a screen that captures drifting objects and the like when a tsunami or storm surge occurs and a tsunami barrier including the support structure.

  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 includes, for example, a plurality of support columns standing on the ground and a capture screen supported by these support columns, and prevents inflow of drifting material and the like and outflow of luggage by the support columns and the screen. Can absorb shock.
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.

  For example, as shown in FIG. 7 (a), the column 200 erected on the ground is usually embedded at one end of the concrete foundation 210 in the ground or as shown in FIG. 7 (b). 7 is connected by welding to a tubular pile foundation 220 having the same diameter as that of the column 200 and embedded in the ground, or as shown in FIG. Are partially inserted into and fixed to a tubular pile foundation 230 embedded in.

JP2013-119698A

By the way, when carrying additional luggage into the loading space surrounded by the tsunami barrier or when unloading luggage from the loading space, a support column is provided so as not to obstruct the traffic of the vehicle that loads or unloads the luggage. There is a case where it is desired to secure a passageway by removing the air.
However, in any of the configurations shown in FIGS. 7A, 7 </ b> B, and 7 </ b> C, the support column 200 is integrally formed with the base portions 210, 220, and 230. It must be removed together with 210, 220, and 230, and there is a possibility that the labor of the work becomes very large.
In addition, when it is desired to install the support column 200 again at the place where the support column 200 is removed, it is necessary to form the foundation portions 210, 220, and 230 again, and there is room for improvement in terms of re-installing the support column 200.
In addition, in consideration of vehicle traffic, there may be a method in which a column and a screen are not provided in advance on a part of the tsunami barrier. It will disappear.

  Then, this invention is made | formed in view of the said subject, and it aims at providing the tsunami barrier provided with the support | pillar structure which can be constructed and disassembled easily and rapidly, and the said support | pillar structure.

  In order to solve the above-described problems, the present invention provides a column structure that is erected on the ground at a predetermined interval in a tsunami barrier that captures an object that has been swept away by the force of a wave, and has one end portion of the ground structure. A strut base portion embedded in the strut base portion and a strut body portion connected in series to the strut base portion and extending toward the ground, the strut base portion being the other end facing the strut body portion A base side protruding portion that protrudes outward from the outer surface of the main body, the column main body portion has a main body side protruding portion that protrudes outward from the outer surface of the end facing the column base portion, The support base and the support main body are connected to each other through the base-side protrusion and the main-body protrusion so as to be separable from each other.

  Moreover, it is preferable that the said base side protrusion part and the said main body side protrusion part are formed in cyclic | annular form, and have a several hole in which the connection tool which connects mutually is penetrated.

  Moreover, it is preferable to provide the foundation structure which supports the said support | pillar foundation part in the ground, and this foundation structure and the said support | pillar foundation part are comprised integrally.

  The support foundation is provided in a recess formed in the foundation structure or the ground, and the recess is formed by a closing member in a state where the support foundation and the support body are separated. It is preferably closed.

  Moreover, it is preferable that the said support | pillar base part is provided so that the said other end part may protrude from the said ground, and the said other end part is accommodated in the hill-like part provided in the said ground.

  Furthermore, in order to solve the above-described problems, the present invention captures a plurality of support structures standing on the ground and an object that is bridged between the support structures and is swept away by the force of waves. A tsunami barrier comprising a screen, wherein the column structure includes a column base part embedded in the ground, and a column main body unit connected in series to the column base unit and extending toward the ground. The strut base has a base-side projecting portion projecting outward from the outer surface of the other end facing the strut main body, and the strut main body is an outer surface of the end facing the strut base. A main body side protruding portion that protrudes outward from the main body, and the column base portion and the column main body portion are detachably connected to each other via the base side protruding portion and the main body side protruding portion. It is characterized by.

  According to the present invention, the strut structure can be constructed and disassembled easily and quickly.

It is a perspective view of the quay where the tsunami barrier surrounding a load was provided. It is a fragmentary sectional view which shows partially the support | pillar structure which concerns on one embodiment. It is a top view of the connection member used for connection of a support | pillar base part and a support | pillar main-body part. It is sectional drawing which shows the support | pillar base part in the state which the support | pillar main-body part isolate | separated. It is sectional drawing which shows the other support | pillar base part in the state which the support | pillar main-body part isolate | separated. It is a fragmentary sectional view which shows partially the support | pillar structure which concerns on other embodiment. It is a figure which shows the conventional support | pillar.

  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 a various form in the scope of the present invention.

<Structure of tsunami barrier>
1A and 1B are perspective views of a tsunami barrier, in which FIG. 1A shows a tsunami barrier in a closed state, and FIG. 1B shows a tsunami barrier in a partially opened state. FIG. 2 is a diagram partially showing a column structure according to an embodiment. FIG. 3 is a plan view of a connecting member that connects the support base and the support main body to each other. FIG. 4 is a diagram showing the column base portion in a state where the column main body portion is separated.

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 shown in FIG. 1 (a) is one that completely surrounds and closes the loading space S, so that the load C cannot be loaded into or unloaded from the loading space S. On the other hand, the tsunami barrier 1 shown in FIG. 1B does not completely surround the loading space S, but carries out the temporarily placed luggage C or carries the luggage C into the loading space S. Therefore, a gate 11 through which the vehicle passes is provided and is partially open.
The tsunami barrier 1 includes a plurality of support columns 2, a support structure 3, and a screen 4.

(Support)
A plurality of support columns 2 are erected on the ground as a foundation. 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. Since the tsunami barrier 1 shown in FIG. 1 is formed in a rectangular shape, the alignment direction of the columns 2 is changed at four locations so as to have four corners.
The plurality of struts 2 are arranged between the end struts 21 so as to form an end strut 21 that supports the end of the screen 4 and a substantially C shape (see FIG. 1B) in plan view. And intermediate struts 22 that support the screen 4.
The end column 21 is configured to be stronger than the intermediate column 22 that supports the middle of the screen 4 so that the end column 21 can withstand the tension acting on the screen 4. Specifically, the end column 21 is larger in diameter and thicker than the intermediate column 22, and is deeply embedded 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 that has collided with the intermediate strut 22 by deformation. However, the intermediate strut 22 is reduced by absorbing the collision energy due to the extension of the screen 4.
The end struts 21 and the intermediate struts 22 are formed integrally with a foundation structure embedded in the ground.

(Support structure)
As shown in FIG. 1, a plurality of column structures 3 are arranged with a predetermined interval between the end columns 21 constituting the gate 11. That is, in the illustrated embodiment, the column structure 3 is constructed instead of installing the intermediate column 22 between the end columns 21 constituting the gate 11.
As shown in FIG. 2, the support structure 3 includes a foundation structure 31, a support foundation 33, and a support body 37.

  The foundation structure 31 is made of concrete and buried in the ground. The foundation structure 31 has a concave portion 31a that is recessed toward the ground on the upper surface thereof.

The column base portion 33 is provided such that the lower end portion of the column base portion 33 is embedded in the foundation structure 31 and the upper end portion of the column base portion 33 is within the recess portion 31a below the ground. That is, the column base 33 is installed in the recess 31a so as not to protrude upward from the ground surface.
The support base 33 includes a tubular member 34 and a connecting member 35.
The tubular member 34 is formed of a steel cylindrical member, and a lower end portion thereof is embedded and fixed in the foundation structure 31. The connection member 35 is provided for connection between the column base portion 33 and the column main body portion 37, is located on the inner side of the recess 31 a, and has a circular shape in a plan view and has a larger diameter than the tubular member 34. It is made of a manufactured plate material. The connecting member 35 is joined to the upper end of the tubular member 34 by, for example, welding.

  As shown in FIG. 3, the connecting member 35 has a flange portion 35 a that protrudes outward from the outer edge of the tubular member 34 over the entire circumference at the upper end facing the column main body portion 37. The flange portion 35a has a plurality of insertion holes (not shown) provided at intervals of 90 °, 45 °, or 30 ° when viewed from the center, for example. A connector B such as a bolt that connects the support base 33 and the support main body 37 is inserted through the insertion hole. In the illustrated embodiment, twelve insertion holes are provided at intervals of 30 °, but the number of holes is not particularly limited and can be freely set.

As shown in FIG. 2, the column main body 37 is a portion that is connected in series to the column base 33 in the recess 31 a and extends toward the ground.
The column main body 37 includes a tubular member 38 and a connecting member 39.
The tubular member 38 is formed of a steel cylindrical member. The connecting member 39 is located inside the recess 31 a when connected to the connecting member 35. The connection member 39 is provided for connection between the column base portion 33 and the column main body portion 37, is located on the inner side of the recess 31 a, and has a circular shape in plan view and has a diameter larger than that of the tubular member 38. It is made of a manufactured plate material. The connecting member 39 is joined to the lower end portion of the tubular member 38 by, for example, welding.
As shown in FIG. 3, the connecting member 39 has a flange portion 39 a that protrudes outward from the outer edge of the tubular member 38 over the entire circumference at the lower end portion facing the column base portion 33. The flange portion 39a has a plurality of insertion holes (not shown) provided at intervals of 90 °, 45 °, or 30 ° when viewed from the center, for example. A connector B such as a bolt that connects the support base 33 and the support main body 37 is inserted through the insertion hole. In the illustrated embodiment, twelve insertion holes are provided at intervals of 30 °, but the number of holes is not particularly limited and can be freely set.

(screen)
The screen 4 is designed 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 to prevent the load C in the loading space S from flowing out to the sea due to pulling waves. It becomes a capture body of the thing shed by.
The screen 4 includes, for example, a plurality of wire ropes 41 that are passed through the columns 2 and the column structures 3 arranged side by side. Each wire rope 41 is inserted into an insertion hole (not shown) provided in each column 2 and column structure 3 so as to be along a horizontal direction orthogonal to the axial direction of each column 2 and column structure 3. . Each wire rope 41 is installed so that the extending directions thereof are parallel to each other, and the installation direction is changed in the intermediate support column 22 which is a corner portion of the tsunami barrier 1. As shown in FIG. 1, when the tsunami barrier 1 is provided in a rectangular shape, the wire rope 41 is bent by approximately 90 ° at the corners.

<Construction of support structure>
Next, the construction of the support structure 3 will be described.
First, the installation location of the column structure 3 is determined with a predetermined interval between the gates 11. The determined installation location is excavated to form a hole H for the foundation structure 31. Concrete is placed in the hole H to a predetermined height. In the middle of placing concrete, the lower end portion of the column base 33 is buried in the concrete and fixed by a predetermined method.
Before the concrete reaches the connecting member 35, a frame is assembled so that a recess 31a is formed around the support foundation 33 at the center of the foundation structure 31. Thus, the support base 33 is formed integrally with the base structure 31 in the recess 31a.
Next, the column main body 37 is attached to the column base 33. Specifically, the coupling member 39 of the column main body 37 is overlapped with the coupling member 35 of the column base 33, and the holes in the flange portions 35a and 39a of both the coupling members 35 and 39 are aligned. The connecting portion B is inserted into the holes aligned with each other, for example, from the column main body portion 37 side, and a fastener such as a nut is fastened to the portion of the connector B protruding to the side opposite to the insertion side, that is, the column base portion 33 side. Thereby, the support | pillar base part 33 and the support | pillar main-body part 37 are connected.

In the conventional structure shown in FIGS. 6A to 6C, when the load C is to be carried into or out of the tsunami barrier 1, or when the load C is to be exchanged, the support including the substructure is included. Needed to be removed. On the other hand, according to the column structure 3 described above, the column main body 37 can be detachably connected to the column base 33, so that the column main body 37 is simply removed from the column base 33. A gate 11 for loading or unloading the load C can be formed. In addition, when the damaged column structure 3 needs to be replaced, only the column main body 37 can be replaced.
Further, since the plurality of holes through which the fastener B is inserted are provided at the outer peripheral end portions of the flange portions 35a and 39a of the connecting members 35 and 39, the adjacent strut structures 3 and further the strut structures 3 The column main body portion 37 can be connected to the column base portion 33 by aligning the orientations of the insertion holes through which the wire rope 41 passes in the column 2 adjacent to the column.
Moreover, the support | pillar base part 33 has the connection member 35 located in the recessed part 31a below a ground surface. Thereby, as shown in FIG. 4, the recessed part 31a can be covered with the closure members 31b, such as a lid | cover, in the state from which the support | pillar main-body part 37 is removed. Thereby, for example, a person or a vehicle can enter the tsunami barrier 1 safely and smoothly or advance from the tsunami barrier 1.

<Others>
In the above embodiment, the column structure 3 is constructed instead of installing the intermediate column 22 between the end columns 21 constituting the gate 11, but the end column 21 is constructed by the column structure 3. May be.
It is also possible to configure all the columns 2 constituting the tsunami barrier 1 with the column structure 3.
The flange portions 35a and 39a may be formed by fitting and welding, for example, a donut-shaped annular member to one end of the tubular members 34 and 38. Further, the flange portions 35a and 39a are not limited to annular ones, and may be partially formed on the peripheral surfaces of the tubular members 34 and 38.
In the embodiment shown in FIG. 2, the recess 31 a is not closed in a state where the column base 33 and the column main body 37 are connected, but it can be closed by a predetermined closing member.

Moreover, as shown in FIG. 5, the support | pillar base part 33 may be provided so that the connection member 35 may protrude from the ground. In this case, the portion of the support base 33 that protrudes from the ground may be surrounded by, for example, raising soil to the ground. In other words, the support base 33 is provided in a recess Ma formed at the center of a hill M formed by raising soil on the ground.
In addition, in the state which the support | pillar base part 33 and the support | pillar main-body part 37 have isolate | separated, the recessed part Ma can be closed with a predetermined | prescribed closing member.

<Other embodiments>
Next, a column structure 6 according to another embodiment will be described with reference to FIG. Hereinafter, only different parts from the above embodiment will be described, and the same components as those in the above embodiment will be denoted by the same reference numerals and description thereof will be omitted. FIG. 6 is a partial cross-sectional view for explaining a configuration of a column structure 6 according to another embodiment.
The foundation structure 61 in the column structure 6 is a so-called pile-type foundation structure. The foundation structure 61 includes, for example, a tubular member 62 made of steel and, for example, a filling member 63 filled in the tubular member 62. The tubular member 62 is embedded in the ground to a predetermined depth in a recess 31a formed by excavating the ground. The inside of the tubular member 62 is filled with a filling material 63 to a predetermined height.
The deeper underground side of the filling material 63 is backfilled with excavated soil 63a.
From the upper end surface of the excavated soil 63a to the opening of the tubular member 62 is filled with mortar 63b, and the lower end portion of the column base portion 33 is embedded and fixed in the mortar 63b. Thus, the support base 33 is formed integrally with the base structure 61.
The strut structure 6 has at least the same effects as the strut structure 3 described above.

DESCRIPTION OF SYMBOLS 1 Tsunami barrier 11 Gate 2 Column 21 End column 22 Intermediate column 3 Column structure 31 Foundation structure 31a Recess 33 Column foundation 34 Tubular member 35 Connecting member 35a Flange (base portion side protruding portion)
37 Column body 38 Tubular member 39 Connecting member 39a Flange (projection on the body side)
4 Screen 41 Wire rope 6 Strut structure 61 Substructure 62 Tubular member 63 Filling material B Connecting tool

Claims (6)

A strut structure standing on the ground at a predetermined interval in a tsunami barrier that captures an object that has been swept away by the force of waves,
A strut base with one end embedded in the ground,
A column main body connected in series to the column base and extending toward the ground,
With
The support base portion has a base-side protrusion that protrudes outward from the outer surface of the other end facing the support main body,
The column main body has a main body side protruding portion that protrudes outward from the outer surface of the end facing the column base,
The support structure according to claim 1, wherein the support base and the support main body are detachably connected to each other via the base protrusion and the main protrusion.   2. The support column according to claim 1, wherein the base-side projecting portion and the main-body-side projecting portion are formed in an annular shape, and have a plurality of holes through which a connector for connecting each other is inserted. Structure.   3. The support structure according to claim 1, further comprising a foundation structure that supports the support foundation in the ground, wherein the support structure and the support foundation are configured integrally. The strut foundation is provided in a recess formed in the foundation structure or the ground,
The column structure according to claim 3, wherein the recess is closed by a closing member in a state where the column base portion and the column main body portion are separated. The support base is provided so that the other end protrudes from the ground,
The said other end part is accommodated in the hill part provided in the said ground, The support | pillar structure as described in any one of Claim 1 to 3 characterized by the above-mentioned. A tsunami barrier comprising a plurality of support structures erected on the ground and a screen that captures an object that is bridged between the support structures and is swept away by the force of waves,
The column structure includes a column base portion embedded in the ground and a column main body unit that is connected in series to the column base unit and extends toward the ground. A base side protruding portion that protrudes outward from the outer surface of the other end facing the portion, and the column main body portion protrudes outward from the outer surface of the end facing the column base portion A tsunami barrier comprising a protrusion, wherein the support base and the support main body are detachably connected to each other via the base protrusion and the main protrusion.

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