JP2013147823A - Tide structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tide structure which can be easily and quickly constructed.SOLUTION: The tide structure includes: a plurality of steel pipe piles 2 installed at every prescribed interval in a tide prevention target location; a plurality of precast members 3 respectively attached between two adjacent steel pipe piles 2 of the plurality of steel pipe piles 2; and an impervious buffer material 9 filled between the respective precast members 3 and the respective steel pipe piles 2 and deformed or destructed by relative displacement of the respective precast members 3 and the respective steel pipe piles 2. The plurality of precast members 3 forming multistage structure are attached to the plurality of steel pipe piles 2, and upper and lower stages of the precast members 3 are alternately arranged or the upper and lower stages are alternately arranged in every other stage or every two or more stages in a zigzag manner. Both left and right end faces of the respective precast members 3 are formed into a curved surface, and end faces of the adjacent precast members 3 of the respective stages are brought into contact with each other.

Description

  The present invention relates to a tide structure, and more particularly to a tide structure that is effective in preventing the occurrence of disasters caused by storm surges, tsunamis, and the like.

  In areas facing the sea, various tide structures such as tide walls are installed to prevent disasters caused by storm surges and tsunamis. However, since existing tide structures are installed based on conventional disaster prevention standards, they cannot cope with unexpected storm surges or tsunamis that exceed the standards.

  For this reason, the existing tide structure is raised so that it can cope with unexpected storm surges and tsunamis that exceed conventional disaster prevention standards, or the tide tide is high enough to cope with unexpected storm surges and tsunamis. It is necessary to urgently take some measures such as establishing a new structure.

  Patent Document 1 discloses a chin-attached wall body as a tide structure. This wall with a chin is constructed so as to be constructed using a movable frame device. The movable formwork apparatus includes a formwork composed of a pair of formwork bodies, a rail installed on both outer sides of a portion for constructing the chin-attached wall body, and a wheel that supports the formwork so as to travel and move on the rail. It is possible to construct a wall with a jaw having a predetermined height by placing concrete between the two mold bodies of the mold while moving the mold on the rail.

  However, when constructing a chin wall as a seawall using the movable formwork device having such a configuration, the apparatus becomes large, so it takes a lot of labor and time to install the apparatus, and an unexpected storm surge Disaster countermeasures against tsunamis and tsunamis cannot be taken immediately.

  On the other hand, in order to cope with the above problems, it is conceivable to install a seawall as described in Patent Document 2. The tide embankment described in Patent Document 2 is a foldable tide embankment that can be deployed on a base that is fixed to the ground, a support that can be inverted from the state of lying on the top of the base, and the front of the support It is provided with a bellows-like wall body that is folded in.

  Since the seawall with such a structure has a simple structure, it can be easily and quickly installed in a place where disaster countermeasures are required.

  However, when a storm surge or tsunami that exceeds the expected level occurs, the structure is simple, so it cannot be fully received, and disasters caused by the storm surge or tsunami cannot be completely prevented. There is a fear.

Japanese Patent Publication No. 63-51233 JP 2011-117236 A

  The present invention has been made in view of the conventional problems as described above, can be easily and quickly installed, and can sufficiently cope with storm surges and tsunamis that exceed expectations. The purpose is to provide a possible tide structure.

The present invention employs the following means in order to solve the above problems.
That is, the present invention is a tide structure, and is installed between a plurality of steel pipe piles installed at a predetermined interval at a tide prevention target place and two steel pipe piles adjacent to each other. A plurality of precast members, and a water-impervious cushioning material that is filled between each precast member and each steel pipe pile, and is deformed or destroyed by relative displacement between each precast member and each steel pipe pile, The plurality of precast members are arranged in a plurality of stages on the plurality of steel pipe piles, and the upper and lower stages of the precast members are alternately arranged, or the upper and lower stages of the precast members are alternately arranged in one or more stages. Attached to the plurality of steel pipe piles in a staggered manner so as to be arranged, each of the precast members is formed with curved left and right end faces, and adjacent precast members of each step Wherein the faces thereof are in contact with each other.

  According to the tide structure of the present invention, a plurality of steel pipe piles are installed at a predetermined interval at a tide prevention target place, a precast member is attached between two adjacent steel pipe piles, and each precast member and each steel pipe pile A tide structure can be installed by filling a water-impervious cushioning material between the two. Therefore, it can be easily and quickly installed in a place where disaster prevention measures are required.

  In addition, when the precast member receives external force due to storm surge or tsunami, it is filled between the precast member and the steel pipe pile with a water-proof cushioning material that deforms or breaks due to the relative displacement of the precast member and the steel pipe pile. In addition, relative displacement between the two is allowed by the deformation or destruction of the water-impervious cushioning material. Thereby, it can prevent that a precast member is damaged.

  In addition, the adjacent precast members have curved end surfaces that are in contact with each other, so that when the precast member is subjected to excessive external force due to storm surge or tsunami, the end surfaces of the precast members are kept in contact with each other. As the two precast members rotate around the steel pipe pile, it is possible to absorb an excessive external force and prevent the precast members from being damaged, and prevent a gap from being generated between the precast members.

  Further, the plurality of precast members are staggered so that the upper and lower precast members are alternately arranged in a plurality of stages, or the upper and lower precast members are alternately arranged in every one or more stages. Since it is attached to multiple steel pipe piles, it is possible to prevent gaps from forming between adjacent precast members at each stage and between adjacent precast members at the top and bottom, and storm surges and tsunamis enter the inland side. Can be prevented.

  In addition, since the end surfaces are formed in a curved shape as described above, even if a plurality of steel pipe piles are not arranged in a straight line, the end surfaces of the precast members are kept in contact with each other between adjacent steel pipe piles. A precast member can be attached, and thereby, an error in construction of the steel pipe pile can be absorbed. Moreover, since no gap is formed between adjacent precast members in each stage, it is possible to prevent storm surges and tsunamis from entering the inland side.

  Furthermore, in the present invention, the precast member is a block having an oval shape in plan view, and both left and right end surfaces are formed in a curved surface, and are provided with two insertion holes penetrating on both sides. It is good also as being comprised so that each of the two steel pipe piles adjacent in a hole may be penetrated.

  According to the tide structure of the present invention, since both left and right end surfaces are formed in a curved shape, even if a plurality of steel pipe piles are not arranged in a straight line, the end surfaces of the precast member are kept in contact with each other, A precast member can be attached between adjacent steel pipe piles, and thereby, errors in construction of the steel pipe piles can be absorbed. Moreover, since no gap is formed between adjacent precast members in each stage, it is possible to prevent storm surges and tsunamis from entering the inland side.

  As described above, according to the tide structure of the present invention, it can be easily and quickly installed, and can sufficiently cope with storm surges and tsunamis that exceed expectations.

It is the schematic which showed one Embodiment of the tide structure by this invention. It is a perspective view of the precast member of FIG. FIG. 3 is a plan view of FIG. 2. It is explanatory drawing which showed the relationship between a precast member and a steel pipe pile. It is explanatory drawing which showed the example of application of the tide structure by this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a tide structure according to the present invention. The tide structure 1 according to the present embodiment is effective in preventing the occurrence of a disaster caused by a storm surge caused by a typhoon or the like and a tsunami caused by an earthquake. In this embodiment, it is assumed that the coast is 10).

  That is, as shown in FIG. 1, the tide structure 1 according to the present embodiment includes a plurality of steel pipe piles 2, a precast member 3 that connects two adjacent steel pipe piles 2, 2, and a precast member 3. And a water-impervious cushioning material 9 filled between the steel pipe piles 2.

  In FIG. 1, for convenience of explanation, only a part (eight in the figure) of the steel pipe piles 2 arranged in a row is shown.

  The steel pipe pile 2 is not particularly limited as long as it has predetermined mechanical properties. For example, a steel pipe pile defined in JIS A 5525 (steel pipe pile) can be used. In the present embodiment, a steel pipe pile 2 having an outer diameter of 2000 mm and a thickness of 25 mm is used.

  The plurality of steel pipe piles 2 are installed in a row at predetermined intervals along the coastline of the target coast 10. Each steel pipe pile 2 is installed on the target coast 10 by a known steel pipe pile method so that the lower end reaches the support layer 11 and the upper end reaches a predetermined height. Each steel pipe pile 2 is formed in a predetermined length by one single pipe or by welding two or more single pipes. In this Embodiment, the height of each steel pipe pile 2 is set so that it can fully respond to the storm surge and the tsunami exceeding the conventional disaster prevention standard.

  As shown in FIGS. 2 and 3, the precast member 3 is a block made of precast concrete having an oblong shape in plan view in which the front surface 4 and the rear surface 5 are formed in a plane and both end surfaces 6 are formed in a curved surface, Two circular insertion holes 7 are provided so as to correspond to the pitch of the steel pipe piles 2. Both end surfaces 6 of the precast member 3 are preferably arcuate surfaces centered on the center of the steel pipe pile 2.

  By inserting each of the two adjacent steel pipe piles 2 and 2 into each insertion hole 7 of the precast member 3, the two adjacent steel pipe piles 2 and 2 are connected by the precast member 3.

  As shown in FIGS. 2 and 3, each insertion hole 7 of the precast member 4 is formed between the inner surface of each insertion hole 7 and the outer surface of the steel pipe pile 2 when the steel pipe pile 2 is inserted into each insertion hole 7. The inner diameter dimension is set so that an annular gap 8 is formed therebetween. In the present embodiment, each insertion hole 7 is set to have an inner diameter of 2100 mm so that an annular gap 8 having a width of 50 mm is formed. The annular gap 8 is filled with a water-impervious cushioning material 9 described later.

  As shown in FIG. 1, the precast member 3 has two steel pipe piles 2 adjacent to each other in a staggered manner so that the steel pipe piles 3 to which the upper and lower precast members 3 are attached are alternately shifted as shown in FIG. Attached between the two.

  Specifically, for the first stage, between the first steel pipe pile 2a and the second steel pipe pile 2b, between the third steel pipe pile 2c and the fourth steel pipe pile 2d, and between the fifth steel pipe pile 2e and the sixth steel pipe pile 2d. The precast member 3 is sequentially attached between the steel pipe pile 2f and between the seventh steel pipe pile 2g and the eighth steel pipe pile 2h. Moreover, about the 2nd stage, between the 2nd steel pipe pile 2b and the 3rd steel pipe pile 2c so that the precast member 3 may each be arrange | positioned between two adjacent precast members 3 and 3 of the 1st stage. The precast member 3 is sequentially attached between the fourth steel pipe pile 2d and the fifth steel pipe pile 2e and between the sixth steel pipe pile 2f and the seventh steel pipe pile 2g. Similarly, in the third to seventh stages, the precast members 3 are sequentially placed between the adjacent steel pipe piles 2 so that the upper precast members 3 are respectively disposed between the two adjacent lower precast members 3 and 3. Install. In addition, the dimension of the precast member 3 is set so that the end surfaces 6 and 6 of the two adjacent precast members 3 and 3 of each step may contact each other.

  For the uppermost precast member 3, the one with the upper end opening of each insertion hole 7 closed is used, and by inserting the upper end of each steel pipe pile 2 into each insertion hole 7 of this precast member 3, The upper end of each steel pipe pile 2 is covered with the member 3.

  A joint material (not shown) made of an elastic material such as a sealing material, a water-stopping material, or a rubber material is interposed in the joint portions of the upper and lower precast members 3 and 3, The space between the precast members 3 and 3 is sealed.

  As described above, the end faces 6 and 6 of the adjacent precast members 3 and 3 in each step are brought into contact with each other, and a plurality of precast members 3 are stacked vertically, so that the adjacent precast members 3 and 3 in each step are stacked. And it can prevent that a clearance gap is formed between the precast members 3 and 3 adjacent up and down.

  In addition, in FIG. 1, the part equivalent to the 1st steel pipe pile 2a of the 2nd step, the part equivalent to the 1st steel pipe pile 2a of the 3rd step, and the 2nd steel pipe pile 2b, the 1st of the 4th step A portion corresponding to the steel pipe pile 2a to the third steel pipe pile 2c, a portion corresponding to the first steel pipe pile 1a to the fourth steel pipe pile 2d in the fifth stage, and a first steel pipe pile 2a to the fifth steel pipe pile in the sixth stage. Although the precast member 3 is not shown in the portion corresponding to 2e, the portion corresponding to the first steel pipe pile 1a to the sixth steel pipe pile 2f of the seventh stage, it is omitted for convenience of explanation, The precast members 3 are similarly attached to these portions.

  In the gaps 8 between the inner surfaces of the insertion holes 7 of the precast members 3 and the steel pipe piles 2, water-impervious cushioning materials 9 are filled, respectively. The water-impervious cushioning material 9 is made of a material that has low rigidity or strength, can be easily deformed or destroyed when subjected to an external force due to a storm surge or a tsunami, and can ensure the filling property and water-stopping property of the gap 8. Yes.

  That is, the water-stop buffer material 9 here does not expect elastic deformation, but deforms or breaks when the precast member 3 and the steel pipe pile 2 are displaced relative to each other due to external force due to storm surge or tsunami. This means that the relative displacement of both is allowed.

  Examples of the water-impervious cushioning material 9 include low-strength mortar, urethane foam, and soil cement. However, the present invention is not limited to this, as long as it has the same rigidity or strength.

By filling the gap 8 with the water-impervious cushioning material 9 having such a function, even when an external force due to a storm surge or a tsunami generates stress ubiquitously on the precast member 3, the water-impervious buffer at a specific portion. When the material 9 is deformed or broken, the stress concentration generated in the specific precast member 3 can be relaxed, and the precast member 3 can be prevented from being damaged.
Moreover, if the precast member 3 and the steel pipe pile 2 remain in a healthy state after the disaster, the function can be easily restored by repairing the water-impervious cushioning material 9 of the broken portion.

  In the tide structure 1 of the present embodiment configured as described above, when a storm surge or tsunami occurs, the storm surge or tsunami is received on the front surface 4 side of the precast member 3 so that they are inland. Intrusion can be prevented.

  In this case, as described above, between each insertion hole 7 of each precast member 3 and each steel pipe pile 2 is filled with a water-impervious cushioning material 9, and this water-impervious cushioning material 9 is external force caused by storm surge or tsunami. By receiving and deforming or destroying, the relative displacement between each precast member 3 and each steel pipe pile 2 is allowed, so that each precast member 3 can be prevented from being damaged.

  In addition, when the support state of each of the plurality of steel pipe piles 2 differs depending on the ground condition, the behavior of each steel pipe pile 2 may be different when subjected to external force due to storm surge or tsunami. In such a case, as shown in FIG. 4, the precast member 3 rotates around the steel pipe pile 2 with a small displacement amount in the direction of the steel pipe pile 2 with a large displacement amount, or the steel pipe pile 2 and the precast member 3 By irregularly deforming the gap between them, it is possible to prevent stress from being concentrated on the specific precast member 3 and prevent the precast member 3 from being damaged.

  In addition, the adjacent precast members 3 of each step are such that the end faces 6 made of curved surfaces are in contact with each other, so that even if each precast member 3 rotates, the adjacent precast members 3 compete with each other. Therefore, it is possible to prevent the adjacent precast members 3 at each stage from competing with each other to be damaged.

  The precast member 3 is configured to be attached between two adjacent steel pipe piles 2 and 2 by inserting each of the two steel pipe piles 2 and 2 adjacent in the two insertion holes 7 and 7. Therefore, even if the plurality of steel pipe piles 2 are slightly deviated from the straight line, they can be easily attached between the two adjacent steel pipe piles 2 and 2. Thereby, the error on construction of the steel pipe pile 2 can be absorbed.

  Further, as shown in FIG. 5, even if the coastline of the target coast 10 is bent into a complicated shape or curved, the single type of precast member 3 can flexibly cope with it. In this case, even if the linear shape is bent into a complicated shape or corresponds to a curved shape, the both end surfaces 6 of each precast member 3 are formed into curved surfaces. Thus, the end surfaces 6 can be maintained in contact with each other, thereby preventing a gap from being formed between the adjacent precast members 3.

  Moreover, since it is set as the state which covered the surface of each steel pipe pile 3 by attaching the several precast member 3 to the several steel pipe pile 2, it can prevent that seawater directly contacts each steel pipe pile 2, and each steel pipe It is possible to prevent the pile 2 from being corroded by seawater.

  In addition, since a plurality of steel pipe piles 2 are installed along the coastline on the target coast 10 and the precast member 3 only needs to be attached between the two adjacent steel pipe piles 2, the construction is simple and quick. It can be installed immediately in places where disaster prevention measures are required.

  Furthermore, since the steel pipe pile 2 can be easily drilled and installed not only in the case of newly installing on the coast 10 but also in a tide structure such as an existing tide bank, It is possible to flexibly cope with the case of raising the height.

  In the above description, the precast members 3 are arranged in a plurality of stages so that the upper and lower precast members 3 and 3 are alternately arranged. However, the upper and lower precast members 3 and 3 are arranged in one or more stages. The precast members 3 may be attached in a plurality of stages so as to be alternately arranged.

  In the above description, a precast concrete block is used for the precast member 3. However, a precast member having the same structure as that of the precast member 3 may be manufactured and used.

DESCRIPTION OF SYMBOLS 1 Tide structure 2 Steel pipe pile 2a 1st steel pipe pile 2b 2nd steel pipe pile 2c 3rd steel pipe pile 2d 4th steel pipe pile 2e 5th steel pipe pile 2f 6th steel pipe pile 2g 7th steel pipe pile 2h 8th steel pipe pile 3 Precast member 4 Front surface 5 Rear surface 6 End surface 7 Insertion hole 8 Clearance 9 Water-impervious cushioning material 10 Beach 11 Support layer

Claims (2)

A tide structure,
A plurality of steel pipe piles installed at predetermined intervals in the tide prevention target place,
A plurality of precast members respectively attached between two adjacent steel pipe piles of the plurality of steel pipe piles;
A water-impervious cushioning material that is filled between each precast member and each steel pipe pile, and is deformed or destroyed by relative displacement between each precast member and each steel pipe pile;
The plurality of precast members are arranged in a plurality of stages on the plurality of steel pipe piles, and the upper and lower stages of the precast members are alternately arranged, or the upper and lower stages of the precast members are alternately arranged in one or more stages. It is attached to the plurality of steel pipe piles in a staggered manner to be arranged,
Each of the precast members is formed of a curved surface at both left and right end surfaces, and the end surfaces of adjacent precast members at each step are in contact with each other.   The precast member is a block having an oval shape in plan view, and both left and right end surfaces are formed into curved surfaces, and are provided with two insertion holes penetrating on both sides, and adjacent to each insertion hole. The tide structure according to claim 1, wherein each of the steel pipe piles is configured to be inserted.