JP6152081B2 - Revetment structure - Google Patents

Description

  The present invention relates to a revetment structure for protecting slopes of rivers, ponds, lakes or dams having slopes.

  Conventionally, as a revetment structure for protecting the slopes of rivers, ponds, lakes or dams, it is formed by joining a plurality of belt members made of resin at predetermined intervals and separating the non-joined portions of the belt members from each other There is known one in which a plurality of cell structure units including a cell structure having a plurality of cells and a stone filled in the plurality of cells are laid on a slope. (For example, refer to Patent Document 1).

JP 2013-217052 A (pages 5 and 6, FIG. 1 to FIG. 3)

  However, in the revetment structure of Patent Document 1, the cells of the cell structure are formed by joining a plurality of band members made of resin at predetermined intervals and separating the non-bonded portions of the band members from each other. The shape of the cell can be freely changed depending on the degree of separation of the non-bonded portion of the band member. On the other hand, since the filler filled in the cells of the cell structure is also sand, crushed stone, on-site generated soil, etc., the filler can also move freely in the cells. For example, the revetment structure of Patent Document 1 has no problem because the riverbed slope is very gentle, about 1/200 (paragraph 0026), but when used as a revetment structure to protect a slope with a relatively steep slope. However, the shape of the cell of the cell structure cannot be maintained due to the influence of the slope of the slope and the external force such as flowing water and falling material, and the protection function of the slope cannot be maintained.

  The present invention has been made paying attention to such problems, and the cell shape of the cell structure is maintained even when it is used as a revetment structure for protecting slopes of rivers, ponds, lakes or dams having slopes. The purpose is to provide a revetment structure that can maintain the protective function of the slope.

In order to solve the above problems, the revetment structure of the present invention is:
An anchor which is a predetermined number punch set on slope, joining a plurality of band members made of resin at predetermined intervals, and have a plurality of cells formed by nonbonding portion of the band member are separated from each other, there in revetment structure in which a plurality laid substantially a rectangular cell structure, a stone to be filled before Symbol plurality of cells, a cell structure unit with a slope which is supported on the slope face by the anchor Te, at least one of the cell structure unit is provided with a substantially rectangular mesh member covering the cell structure, a plurality of outer peripheral edge portions of the net-like member and the cell structure plants, a connecting member connecting the,
The stone is filled up to the upper ends of the plurality of cells, and a part of the stone filled in the cells is pressed by the mesh member having a mesh smaller than the average particle diameter of the stone,
The connecting member is made of a wire material that integrally connects the outer peripheral edge portions of the adjacent cell structures and the outer peripheral edge portions of the adjacent mesh members.
According to this feature, the outer peripheral edge portions of the adjacent cell structures and the outer peripheral edge portions of the adjacent mesh members are integrally connected to each other so that the external force acting on the cell structure unit is shared by the mesh members. The cell shape change can be suppressed, and the slope protection function can be maintained. The rigidity of the connecting portion can be further increased, and the cell shape can be maintained.

The revetment structure of the present invention is
The adjacent mesh members have an overlapping portion.
According to this feature, since the adjacent mesh members connect the overlapping portions, the rigidity of the connecting portions can be further increased, and the cell shape can be maintained.

The revetment structure of the present invention is
The overlapping portion of the mesh member is laid so that the mesh member arranged on the upstream side is on the upper side.
According to this feature, since the overlapping portion of the mesh member is laid so that the mesh member disposed on the upstream side is on the upper side, the force received from the flow can be reduced and damage can be prevented.

It is sectional drawing which shows the structure of the revetment structure which concerns on this invention. It is a perspective view which shows the structure of the revetment structure which concerns on this invention. It is a perspective view which shows a cell structure. It is a figure which shows the connection of a cell structure and a mesh member.

  The form for implementing the revetment structure concerning this invention is demonstrated with reference to FIGS. 1-5.

  As shown in FIGS. 1 and 2, the revetment structure 1 includes a substantially rectangular cell structure 3 having a plurality of cells 3a, a stone 6 as a filling material filled in the plurality of cells 3a, and a net-like structure. A cell structure unit 4 including a member 5 and a connecting member 7, the cell structure 3 is laid on the slope 2, and the cell 3 a of the cell structure 3 is filled with a stone 6. Constructed with multiple laying. Furthermore, the cell structure unit 4 includes a substantially rectangular mesh member 5 that covers the cell structure unit, and a connecting member 7 that connects the mesh member 5 and the cell structure outer peripheral edge 3f at a plurality of locations. Hereinafter, the cell structure 3, the stone material 6, the mesh member 5, and the connecting member 7 that constitute the revetment structure 1 will be described.

  As shown in FIG. 2, the cell structure 3 has a plurality of substantially strip-shaped band members 3b formed of a synthetic resin such as high-density polyethylene having excellent weather resistance, water resistance, and durability and having flexibility. It is comprised by. These band members 3b are arranged so that the width direction thereof is perpendicular to each other, and are joined at predetermined intervals in the longitudinal direction in a state in which the band members 3b are stacked on each other. This joining portion is a joining portion 3c that is welded (or pressed) while applying pressure.

  When the cell structure 3 is expanded in the front-rear direction, the non-joined portions of the band members 3b are separated from each other, thereby forming a cell 3a that restrains the stone 6 as a filler. And this cell 3a is arrange | positioned at zigzag form or honeycomb form, and the stone material 6 is filled in this cell 3a (refer FIG. 2, FIG. 3).

  As shown in FIG. 2, a plurality of small through holes 3d are formed in the band member 3b of the cell structure 3, and the cells 3a communicate with each other through the through holes 3d. After the construction, when a predetermined period of time elapses, earth and sand 11 accumulates between the stone materials 6 filled in the cells 3a, and plants inhabit. The grown plant roots 12 enter the through holes 3d of the cell structure 3 (see FIG. 5), become entangled with the cell structure 3, and the packing and the cell structure 3 are integrated. The slope protection function can be strengthened. Further, since the cell structure 3 has flexibility, it can be wound and transported in a compact state, and can be cut to a length suitable for the situation at the construction site.

  The stone 6 filled in the cell 3a of the cell structure 3 is composed of natural stone such as crushed stone or cobblestone, a concrete block, or a mixture of natural stone and concrete block. The average particle diameter of the stone 6 filled in the cells 3a of the cell structure 3 is determined by conditions such as the flow velocity and the slope of the slope. The area and depth of the cell 3a for storing the stone material 6 are determined according to the average particle diameter of the stone material 6 so that the cell 3a does not hinder the storage of the stone material 6.

  The net-like member 5 is configured by forming a metal wire having a wire diameter (about 3 to 5 mm) into a net shape so as to withstand external forces such as flowing water and falling objects. The net member 5 has a function of covering the cell structure 3 in which the stone 6 is filled in the cell 3a and maintaining the shape of the cell 3a. The mesh size of the mesh member 5 is smaller than the average particle size of the stone material 6. The metal wire is rustproofed by painting, plating, coating with a synthetic resin, or stainless steel. Hereinafter, the function of holding the cell shape of the mesh member 5 will be described.

  The cell structure 3 is formed by joining a plurality of band members 3b made of resin at predetermined intervals and separating the non-bonded portions of the band member 3b from each other. The shape of the cell 3a can be freely changed depending on the degree of separation. Furthermore, the stone 6 filled in the cell 3a of the cell structure 3 can move freely. Therefore, when using it as a revetment structure that protects a slope with a relatively steep slope of about 1: 1.5 such as rivers, ponds, lakes, or dams, the influence of slope of slope, running water, and falling objects The shape of the cell 3a of the cell structure 3 may change due to an external force such as. That is, even if the cell 3a of the cell structure 3 receives a compressive force, the stones 6 in the cell 3a can contact each other and hold the compressive force, so that the shape of the cell 3a can be stably maintained. However, when the cell 3a receives a large tensile force, a gap is generated between the stones 6 in the cells 3a due to the deformation of the cells 3a, the stones 6 move, and the shape of the cells 3a cannot be maintained. In the worst case, the cell structure 3 may be turned over.

  Therefore, in the revetment structure 1 of the present invention, the cell structure unit 4 filled with the stone 6 and the mesh member 5 are integrally connected by the connecting member 7 so that the shape of the cell 3a can be stably maintained. When the mesh member 5 is expanded in a rectangular shape, the wire members of the mesh member 5 mesh with each other, and function as a structure that can hold a tensile external force throughout the mesh member 5. And even if the cell structure 3 receives a tensile force due to the influence of the slope of the slope and the external force such as flowing water and falling material, the mesh member 5 shares the tensile external force and suppresses the shape change of the cell 3a. it can.

  Here, the structure of the bank protection structure 1 which concerns on this invention provided with the cell structure 3, the stone material 6, the net-like member 5, and the connection member 7 is demonstrated based on FIG. In FIG. 3, for the sake of explanation, the installation steps A, B, and C of the revetment structure 1 are described so as to proceed simultaneously and continuously. B may be performed, and the process C may be performed after the process B is completed.

  In step A of FIG. 3, the unevenness of the slope 2 is shaped, and a predetermined number of anchors 8 (see FIG. 1) for supporting the cell structure 3 are placed on the slope 2. The number of anchors 8 is determined so that the stone 6 or the like disposed on the slope 2 can hold a load that slides down the slope 2.

  Next, in step B of FIG. 3, the cell structure 3 is fixed to the anchor 8 that has been placed, and the cell structure 3 is developed along the slope of the slope. A plurality of cell structures 3 are laid according to the area of the slope. Then, if necessary, the anchor 8 is added and fixed to the laid cell structure 3, and the adjacent cell structure 3 is fixed with a dedicated metal fitting or a stapler. Subsequently, the stone 6 is filled in the cell 3 a of the cell structure 3. The stone 6 is preferably filled up to the upper end of the cell 3 a so that a part of the stone 6 is pressed by the mesh member 5.

  3, the cell structure 3 filled with the stone material 6 is covered with the mesh member 5, the cell structure 3 and the mesh member 5 are connected by the connecting member 7, and the cell structure unit 4 is connected. Complete. Here, the connection between the cell structure 3 and the mesh member 5 by the connecting member 7 will be described.

  As shown in FIG. 4A, when the positions of the cell structure outer peripheral edge 3f of the cell structure 3 and the mesh member outer peripheral edge 5a of the net member 5 substantially coincide with each other, the cell structure outer peripheral edge The cell structure unit 4 can be configured by connecting 3f and the net member outer peripheral edge portion 5a by the connecting member 7. With this configuration, the entire mesh member 5 supports the cell structure outer peripheral edge 3f of the cell structure 3, so that even if the cell structure 3 receives a tensile force, the entire mesh member 5 shares the tensile external force. Therefore, the deformation of the cell 3a can be suppressed, and the movement of the stone 6 can be prevented. For the purpose of suppressing the change in the shape of the cell 3a due to the tensile external force, at least the cell structure outer peripheral edge 3f and the mesh member outer peripheral edge 5a may be fixed by a connecting member at a plurality of locations. By fixing the inner part of the part 3f and the inner part of the net member outer peripheral edge part 5a at a plurality of positions, the shape change of the cell 3a due to the tensile external force can be surely suppressed. Here, the cell structure outer peripheral edge 3 f indicates an area where the cell 3 a located at the outer peripheral edge of the cell structure 3 is present. In addition, the connection member 7 can use a metal wire and a stainless steel wire which are hard to rust and have high corrosion resistance.

  Further, as shown in FIG. 4B, the cell structure outer peripheral edge 3f of the plurality of cell structures 3 arranged adjacent to each other and the adjacent net member outer peripheral edge 5a are substantially aligned. In this case, the adjacent cell structure outer peripheral edge 3 f and the adjacent mesh member outer peripheral edge 5 a are integrally connected by the connecting member 7. Thus, even if the position of the adjacent cell structure outer peripheral edge 3f and the position of the adjacent mesh member outer peripheral edge 5a coincide with each other, the cell structure outer peripheral edge 3f and the net member outer peripheral edge 5a are integrated by the connecting member. Since the rigidity of the connecting portion is increased by connecting to, the shape change of the cell 3a due to the tensile external force can be reliably suppressed.

  Further, as shown in FIG. 4C, if the overlapping portion 5b is provided in the adjacent mesh member 5 and the cell structure outer peripheral edge portion 3f adjacent to the overlapping portion 5b is fixed, the rigidity of the connecting portion is further increased. It is possible to further suppress the deformation of the cell structure 3 due to the tensile external force.

  Further, as shown in FIG. 4C, when the overlapping portion 5b is provided in the adjacent mesh member 5, the mesh member 5 arranged on the upstream side of the running water is arranged on the upper side. By doing in this way, the mesh member 5 can reduce the force received from flowing water, without turning up even if it receives the force from flowing water.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  Moreover, in the said Example, although the net-like member 5 and the connection member 7 use the metal wire with high corrosion resistance, it is not restricted to this, Synthetic resin and fiber reinforced plastic with high water resistance, weather resistance, and mechanical strength are used. It may be used.

DESCRIPTION OF SYMBOLS 1 Revetment structure 2 Slope 3 Cell structure 3a Cell 3b Band member 3c Joint part 3f Cell structure outer peripheral part 4 Cell structure unit 5 Net member 5a Net member outer peripheral part 6 Stone material (filling)
7 Connecting member 8 Anchor

Claims (3)

An anchor which is a predetermined number punch set on slope, joining a plurality of band members made of resin at predetermined intervals, and have a plurality of cells formed by nonbonding portion of the band member are separated from each other, there in revetment structure in which a plurality laid substantially a rectangular cell structure, a stone to be filled before Symbol plurality of cells, a cell structure unit with a slope which is supported on the slope face by the anchor Te, and at least one of the cell structure unit is provided with a substantially rectangular mesh member covering the cell structure, a plurality of outer peripheral edge portions of the net-like member and the cell structure plants, a connecting member connecting the,
The stone is filled up to the upper ends of the plurality of cells, and a part of the stone filled in the cells is pressed by the mesh member having a mesh smaller than the average particle diameter of the stone,
The said connection member consists of a wire which connects the outer peripheral edge parts of the said adjacent cell structure, and the outer peripheral edge parts of the adjacent said net-like member integrally, The revetment structure characterized by the above-mentioned.   The revetment structure according to claim 1, wherein an outer peripheral edge portion of the mesh member has an overlapping portion with an outer peripheral edge portion of the adjacent mesh member.   The revetment structure according to claim 1 or 2, wherein the overlapping portion of the mesh member is laid so that the mesh member disposed on the upstream side is on the upper side.

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