JP2005098045A5 - - Google Patents

Description

Revetment structure

  The present invention relates to structures such as riverbanks, lakes, coasts, mountain surfaces, valleys (in this specification, sometimes simply referred to as “rivers etc.”) such as bank protection, slopes, etc. This includes the structure of the lake bottom and the seabed, and may be simply referred to as “revetment structure”.) In particular, it relates to the revetment structure for the purpose of conservation of the natural environment.

  Conventionally, when building a revetment such as a river, in order to protect the slope, concrete is placed along the slope or a concrete block is installed. However, along with the recent trend of conservation of the natural environment, the construction method using the above-described conventional concrete is being reviewed, and the development of a construction method suitable for the natural environment is demanded.

  By the way, as a response to the demand for conservation of the natural environment, a hollow concrete block that can be filled with a filler such as crushed stone has been proposed and put into practical use.

  However, because this block is made of concrete and is heavy and difficult to handle, not only is the workability during construction poor, but the internal space can be made very large due to the strength required for the block. Therefore, the amount of filler that can be filled in the block is limited, and the objective of preserving the natural environment by maintaining water permeability has not been achieved completely.

  In the case of a concrete block, a large number of small holes cannot be formed on the peripheral wall of the block, so there are restrictions on the size of the filler to be filled in the block, and local materials are used. In many cases, the construction cost of the revetment, including the transportation cost of the material, increased.

  The present invention is based on the conventional construction method of placing the above concrete or installing a concrete block, and the problems of a hollow concrete block that can be filled with a filler such as crushed stone. The amount of filler to be filled is increased by forming a large space, which can maintain the natural environment while maintaining good water permeability, and has high workability during construction and the size of the filler. The purpose of the present invention is to provide a revetment structure that can reduce the construction cost of the revetment including the material transportation cost without any restrictions.

In order to achieve the above object, the revetment structure of the present invention is configured by installing a metal tubular body having a large number of through holes in the peripheral wall on the revetment, connecting adjacent tubular bodies to each other, and In the revetment structure filled with a filler such as crushed stone, the metal tubular body is installed via an expanded metal laid on the revetment, and the tubular body is filled with a filler such as crushed stone The upper surface of the cylindrical body is covered with a net formed by knitting a metal wire having a plurality of concave grooves in the longitudinal direction.
In this case, “river, etc.” includes rivers, lakes, coasts, mountain slopes, valleys, etc., and revetment structures include structures of shallow riverbeds, lake bottoms, and seabeds in addition to slopes.

In this case, a net formed by knitting a metal wire having a spiral groove on the net covering the upper surface of the cylindrical body filled with a filler such as crushed stone can be used.

  Moreover, in order to achieve the same purpose, the revetment structure of the present invention has a cylindrical structure in which a metallic cylindrical body having a large number of through holes formed in the peripheral wall is installed on the revetment, and adjacent cylindrical bodies are connected to each other. In the revetment structure filled with crushed stone and other fillers inside the body, the metallic cylindrical body is installed via expanded metal laid on the revetment, and the inside of the tubular body is filled with fillers such as crushed stone In addition, the upper surface of the cylindrical body is covered with a net formed by knitting a metal wire whose surface is shot blasted.

In this case, it is possible to use a net formed by knitting a metal wire whose surface is shot blasted in a net covering the upper surface of a cylindrical body filled with a filler such as crushed stone.
desirable.

Moreover, the net | network body using the metal wire rod made from stainless steel can be used .

According to the revetment structure of the present invention, it is possible to easily obtain the required strength simply by installing a metal tubular body having a large number of through holes in the peripheral wall on the revetment and adjusting the thickness of the steel material to be used. Can increase the amount of filler to be filled by forming a large internal space, thereby maintaining good water permeability and preserving a rich natural environment where fish and insects can live easily . In addition, the metal cylindrical body is smaller in weight than the concrete block, is easy to handle, and can be easily connected to the adjacent cylindrical bodies. Workability is high, and it is possible to cope with various fillers only by adjusting the size of the through-hole formed in the peripheral wall, so that the construction cost of the revetment including the transportation cost of the material can be reduced.
In addition, by installing the metallic cylindrical body through the expanded metal laid on the revetment, it is possible to prevent the filler filled in the cylindrical body from flowing out, and the cylindrical body The installation object can be stabilized.
Furthermore, walking by covering the upper surface of the cylindrical body with a net formed by knitting a metal wire having a plurality of concave grooves in the longitudinal direction and a net formed by knitting a metal wire with a shot blast treatment on the surface. While preventing slipping at the time, the durability of the mesh body is not lowered.

  In addition, by using a mesh body formed by knitting a metal wire having a spiral groove, the groove can be made to appear on the walking surface reliably and evenly, preventing slipping more reliably during walking. can do.

  In addition, by using a net formed by knitting a metal wire whose surface is shot blasted, it is possible to prevent slipping during walking, increase the strength of the metal wire, and improve durability.

Moreover, by making the net body made of stainless steel, it is possible to prevent a harmful substance from eluting and to have a highly durable revetment structure.

  Hereinafter, embodiments of the revetment structure of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment in which the revetment structure of the present invention is applied to a river revetment.
In this revetment structure, a cylindrical body 1 made of metal such as stainless steel having a large number of through holes formed in a peripheral wall 11 as shown in FIG. 2 is installed on a slope and a riverbed (see FIGS. 1 (a) and 2). In the described embodiment, the cylindrical body 1 is formed so that the planar shape is a hexagon, and in the case shown in FIG. 1B, the cylindrical body 1 is formed so that the planar shape is a square or a rectangle. In order to prevent the installed cylindrical body 1 from moving due to the action of running water, etc., the adjacent cylindrical bodies 1 are connected to each other by fasteners such as bolts, nuts, spiral wires, welding, etc. The cylindrical body 1 is filled with a filler 2 such as crushed stone.

  In this case, the cylindrical body 1 has a number of slits formed in a stainless steel plate having a thickness of several mm to 10 mm according to the use environment, required strength, and the like. By bending a metal plate with a large number of through-holes such as expanded metal that has holes formed, the planar shape is formed into a hexagon, square, or rectangle. Adopting any shape such as triangle, hexagon, polygon such as octagon, square or rectangle, cylinder, etc. by connecting with fasteners such as spiral wires or welding, etc. Can do.

  The cylindrical body 1 can be configured by omitting at least a part of the peripheral wall of the cylindrical body 1, and the peripheral wall of the omitted cylindrical body 1 can be configured by the peripheral wall 11 of the adjacent cylindrical body 1. Thereby, the overlap of the peripheral wall 11 of the adjacent cylindrical body 1 can be eliminated, water permeability can be improved, material costs can be saved, and the manufacturing cost of the cylindrical body 1 can be reduced.

Moreover, the cylindrical body 1 is installed via a metal expanded metal 3 such as stainless steel laid on the slope and the riverbed, and the installed cylindrical body 1 and the expanded metal 3 laid on the slope and the riverbed are connected. , Bolts and nuts, and spiral fasteners.
Thereby, while being able to prevent the filler 2 with which the inside of the cylindrical body 1 filled out, it can prevent the installation state body of the cylindrical body 1 from stabilizing.

In addition, as shown in FIG. 3, the upper surface of the cylindrical body 1 filled with the filler 2 is plural in the longitudinal direction (in this embodiment, three at intervals of 120 °. Or a wire body 41 formed by knitting a metal wire 41 having a concave groove 42), and the cylindrical body 1 and the net body 4 are covered with bolts, nuts, and spirals. Connect with a fastener such as wire.
As a result, a concave groove 42 appears on the surface of the net 4 formed by knitting the metal wire 41, and the direction of the concave groove 42 becomes different between adjacent metal wires 41 constituting the net 4. The concave grooves 42 can effectively prevent slipping when walking on the mesh body 4.
Further, since the concave groove 42 is formed in the longitudinal direction of the metal wire 41, the metal wire 41 is easily manufactured and does not cost to manufacture, and the metal wire 41 is sheared at the position of the concave groove 42. It is difficult to break and the durability of the mesh body 4 is not lowered.
In particular, by using the mesh body 4 formed by knitting a metal wire 41 having a spiral groove 42 as shown in FIG. 3C, the groove 42 appears on the walking surface reliably and evenly. It is possible to prevent slipping during walking more reliably.

In addition, the mesh body 4 is formed by knitting a metal wire whose surface is shot blasted, preferably shot blasted using a sphere such as a steel ball having a diameter of 0.2 to 0.8 mm. Can be used.
As shown in FIG. 6, this mesh body has a high coefficient of friction, so that it can prevent slipping during walking, and the shot blasting treatment can increase the strength of the metal wire and improve durability. There are advantages you can do.

  In this embodiment, the cylindrical body 1 to be installed on the slope is installed in a planar shape so that the top thereof is parallel to the slope. However, the present invention is not limited to this, and FIG. As shown, a step can be provided on the top of the step so as to be installed stepwise.

  Moreover, as shown in FIG. 4, the cylindrical body 1 installed in the riverbed has, for example, cylindrical bodies 1A that protrude every few pieces so that the height of the top portion differs between adjacent cylindrical bodies. As a result, the landscape can be accented and the buffering effect of running water can be achieved.

  Normally, as shown in FIG. 5A, the crushed stone 21 is uniformly filled inside the cylindrical body 1, but the filler 2 to be filled is a method of installing the cylindrical body 1. It can be arbitrarily selected according to the state of the surface, the riverbed, etc., and other incidental requests. For example, when using local materials, etc., when using pebbles and sand having a particle size smaller than the size of the through holes formed in the peripheral wall 11 of the cylindrical body 1, as shown in FIG. In addition, after disposing a non-woven fabric 23 having water permeability made of natural fibers or synthetic resin fibers on the inner peripheral surface of the peripheral wall 11 of the cylindrical body 1, a granular material 22 such as pebbles or sand is filled. Further, when purifying the water of the river, as shown in FIG. 5C, the cylindrical body 1 is filled with crushed stones 21a, 21b and a purifying material 24 such as charcoal in a layered manner or mixed. To. Moreover, as shown in FIG.5 (d), the nonwoven fabric layer 25 which has the water permeability which consists of a natural fiber or a synthetic resin fiber can also be formed in the upper surface of the crushed stone 21 with which the cylindrical body 1 was filled.

  As described above, the revetment structure of the present invention has been described based on the examples thereof, but the present invention is not limited to the configuration described in the above examples, for example, if necessary, vegetation, etc. The configuration can be changed as appropriate without departing from the spirit of the invention.

  The revetment structure of the present invention increases the amount of filler to be filled by forming a large internal space, thereby maintaining good water permeability and preserving the natural environment, and improving workability during construction. It is suitable for river revetment (floor protection) because it is high and has no restrictions on the size of the filler, etc., and it has the characteristics that can reduce the construction cost of the revetment including the transportation cost of materials. In addition, for example, revetments such as lakes, coasts, mountain surfaces, valleys, slopes (including the structure of shallow riverbeds, lake bottoms, and seabeds. In this case, it is a purification structure for water bodies). In particular, it can be widely applied to civil engineering structures of this kind, such as dams, valley stops, retaining walls, retaining walls.

It is a perspective view which shows one Example which applied the bank protection structure of this invention to the bank protection of a river. An example of a cylindrical body is shown, (a) is a top view and (b) is a front view. The metal wire which comprises a net | network body is shown, (a) is a front view, (b) is sectional drawing, (c) It is a perspective view which shows the modification of a metal wire. It is a perspective view which shows the modification Example which applied the bank protection structure of this invention to the bank protection of a river. It is explanatory drawing which shows a cylindrical body. It is a graph which shows the characteristic (The relationship between the diameter of the spherical body used for shot blasting, a friction coefficient, and the maximum load of a metal wire) of the shot blasting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical body 11 Perimeter wall 2 Filler 3 Expanded metal 4 Net body

Claims (5)

  In the revetment structure in which a metal tubular body with a large number of through holes formed on the peripheral wall is installed on the revetment, and the adjacent tubular bodies are connected to each other, and the inside of the tubular body is filled with a filler such as crushed stone, The metal cylindrical body is installed through an expanded metal laid on the revetment, and the cylindrical body is filled with a filler such as crushed stone, and the upper surface of the cylindrical body is arranged in a plurality in the longitudinal direction. A revetment structure characterized in that it is covered with a net formed by knitting a metal wire having a concave groove. A net body for revetment structure, which is formed by knitting a metal wire having a spiral groove in a net covering an upper surface of a cylindrical body filled with a filler such as crushed stone.   In the revetment structure in which a metal tubular body with a large number of through holes formed on the peripheral wall is installed on the revetment, and the adjacent tubular bodies are connected to each other, and the inside of the tubular body is filled with a filler such as crushed stone, The metallic cylindrical body was installed through an expanded metal laid on the revetment, and the cylindrical body was filled with a filler such as crushed stone, and the upper surface of the cylindrical body was shot blasted. A revetment structure that is covered with a net formed by knitting metal wire. A net body for revetment structure, which is formed by knitting a metal wire whose surface is shot blasted in a net body covering an upper surface of a cylindrical body filled with a filler such as crushed stone. The metal body for a revetment structure according to claim 2 or 4, wherein a metal wire made of stainless steel is used .