JP5467832B2 - Slope construction method - Google Patents

Description

  The present invention relates to a slope construction method using a structure in which a cylindrical body is filled with a filler. More specifically, the present invention relates to a slope construction method using a structure in which a cylindrical body made of geogrid is filled with a filler.

  Conventionally, in order to construct a slope structure for slope reinforcement or retaining wall formation, the method of stacking stone fences packed in metal fences in contact with the slope is the riverbank, coast, roadside slope. (For example, Patent Document 1). However, in the construction method using such a metal hoe, the heel itself is heavy and takes a lot of work, and the slope structure may easily collapse due to metal corrosion.

  On the other hand, it has been proposed to construct a slope structure for slope reinforcement or retaining wall formation using a resin material without corrosion. For example, Patent Document 2 discloses a retaining wall structure using a honeycomb-shaped geocell having a honeycomb structure in which a strip material made of a polymer material is welded, and Patent Document 3 describes a similar honeycomb-shaped three-dimensional structure reinforcing material. The retaining wall construction method using the structure which consists of is proposed. Patent Document 3 proposes that part of the honeycomb-shaped reinforcing material has a perforated structure or the structure has drainage in order to impart drainage to the structure.

  However, in such a method using a honeycomb-shaped reinforcing material, a process for manufacturing the honeycomb-shaped reinforcing material is necessary in advance, and it is not possible to change the shape and size of the reinforcing structure according to the situation of the construction site. It was difficult and there was a problem that construction on site was restricted.

JP-A-11-71768 Japanese Utility Model Publication No. 6-67535 JP 2008-138446 A

The present inventors propose a technique for solving the above-described problems of the prior art.
An object of the present invention is to provide a method for constructing a slope structure using a structural material that is not corrosive, lightweight, can be assembled on site, and can be easily constructed according to the shape of the slope.

According to the present invention, there is provided a slope construction method in which a structure filled with soil as a filler is laminated on a cylindrical reinforcing material made of geogrid and opened vertically .

The reinforcing material was obtained by joining the ends of a plate-like geogrid, which is a net-like product obtained by processing a thermoplastic resin net-like material or resin plate-like material stretched uniaxially or biaxially into a lattice shape . The slope construction method described above is a preferred embodiment of the present invention.

  The above-described slope construction method in which the laminated structure includes a structure having higher water permeability than the structure constituting the main structure is a preferable aspect of the present invention.

  The above-described slope construction method in which the stacked structures are connected to each other or to the slope by piles and / or anchor pins is a preferred embodiment of the present invention.

  One or more layers of the laminated structure have a plate-like geogrid combined with the structure, and the above-described slope construction method in which the plate-like geogrid is embedded in the slope is, This is a preferred embodiment of the present invention.

According to the present invention, there is provided a construction method of a slope structure using a structural material that is not corrosive, lightweight, can be assembled on site, and can be easily constructed according to the shape of the slope.
The slope construction method provided by the present invention can be suitably applied to a cut slope.
By the slope construction method of the present invention, the rigidity of the slope of the retaining wall can be increased, and the stability and durability of the retaining wall as a whole can be improved.

It is the schematic which shows a mode that a plate-like geogrid is rounded and it is made a column shape. It is the schematic which shows a mode that the geogrid of a net-like object is being fixed with the rod-shaped connection member. It is the outline which shows a mode that the cylindrical reinforcement material is filled with soil and the structure is comprised. It is the outline which shows the aspect in which the structure is laminated | stacked with the inclination of a slope. It is the outline which shows the aspect which laminated | stacked the structure by making the slope of a slope into step shape. It is the schematic which shows a mode that the slope structure was constructed | assembled by this invention. It is the schematic which shows a mode that the slope structure was constructed | assembled with the structure of two rows. It is the schematic which shows a mode that the plate-shaped geogrid is couple | bonded with the structure.

  The geogrid in the present invention is a sheet-like material having a substantially regular lattice structure in which components having tensile resistance are connected, and a material mainly made of a polymer material is preferable.

  Preferred examples of the geogrid according to the present invention include a net-like material obtained from a thermoplastic resin and stretched uniaxially or biaxially, a resin plate-like material processed into a lattice shape, and a high-strength fiber. The thing which knitted multifilament in the shape of a lattice can be mentioned. As the thermoplastic resin, polyolefin such as polyethylene and polypropylene is preferable. As other preferred examples, the fiber material includes aramid fibers, wholly aromatic polyester fibers, ultra high molecular weight polyethylene fibers, ultra high molecular weight polyvinyl alcohol fibers, synthetic fibers such as polyacetal fibers, inorganic fibers such as glass fibers and carbon fibers. A fiber etc. can be illustrated. A material in which multifilaments of high-strength fibers are knitted in a lattice shape may be obtained by resin-coating these knitted fabrics in order to improve strength and durability.

  The reinforcing material of the present invention preferably has a cylindrical shape obtained by rounding a plate-like geogrid. There is no restriction | limiting in particular in the connection method of the both ends of a plate-shaped geogrid, and it can also melt | fuse and may fix with a suitable connection member. Examples of the connecting member include, but are not limited to, a rope, a rod-shaped member, a binding band, and an iron wire.

  Geogrid can be appropriately selected from commercially available ones, and “Tensor” (registered trademark, manufactured by Mitsui Chemicals, Inc.) is a preferred example of a commercially available geogrid. be able to.

  FIG. 1 shows a state where a plate-like geogrid is rounded into a cylindrical shape. Both ends 2 and 2 'are fixed by an appropriate method of the above to form a cylindrical reinforcing material. FIG. 2 shows a state in which the end of a mesh-like geogrid made of high-density polyethylene and fixed by a rod-like connecting member 3 is fixed.

  The obtained cylindrical reinforcing material becomes a structure that is filled with a filler to construct a slope structure. Although there is no restriction | limiting in particular in a filler, Since the soil which generate | occur | produces in a construction site can be used, construction is easy. When filling the cylindrical reinforcing material with soil, a normal method of filling and rolling is used. FIG. 3 shows a state in which the structural body 6 is configured by filling the cylindrical reinforcing material 4 with soil as the filler 5. Soil cement, concrete, mortar, etc. can also be used as the filler. Since the structure having such a filler has increased rigidity, the rigidity of the retaining wall constructed by using the structure for at least a part of the structure is increased, and the durability is improved.

  First, a plurality of the obtained structures are placed in accordance with the shape of the slope to be applied. The structures to be placed may be in a single row or a plurality of rows. It is a preferred embodiment because the stability increases when adjacent structures are connected by an appropriate means. Adjacent structures may be performed at the site before filling with the filler or after filling.

  Subsequently, another structure is stacked on the lowermost structure. In the structure of each layer, adjacent structures may be combined in the same manner as described above.

When the structures are stacked in a predetermined number of stages, it is preferable to stack one or more stages as a drainage layer with a layer having better drainage for treatment of rainwater or the like. As such a drainage layer, a structure filled with sand, gravel, gravel, crushed stone, quarry stone, cobblestone, or the like can be used.
A structure filled with crushed stone or the like is preferably used for a portion that comes into contact with water such as a river slope.

  A slope structure is constructed by repeating the manufacture of the structure described above. At that time, a plurality of layers can be fixed to the stacked structure in the vertical direction by anchor pins or piles. Thus, by fixing with a pin or a pile, it becomes an integral slope structure and stability and earthquake resistance improve.

  When stacking structures, the end portion on the slope side of the upper structure is stacked at a position where it contacts the slope. Therefore, when the slope is inclined, the upper structure is stacked at a position shifted from the lower structure by the slope of the slope, and the back surface of the structure is backfilled with soil.

When the slope is inclined, the structure may be laminated by excavating or embedding the slope according to the shape of the structure to form a stepped shape. FIG. 4 shows an aspect in which the structures are laminated with the slope on the slope as it is. FIG. 5 shows an aspect in which the structures are stacked with the slope being stepped.

  In the slope structure shown in FIG. 5, a predetermined structure is stacked, a structure filled with crushed stone 7 is stacked, and a structure is stacked on the structure. A slope structure is formed by such a laminating operation. By laminating the structures filled with the crushed stone 7, a slope structure with better drainage can be formed for treatment of rainwater and the like. Further, FIG. 5 shows a state in which a plurality of stacked structures are coupled by piles 9 and are also coupled to a slope by anchor pins 10 to form a stronger slope structure. ing.

  The stacking of the structures may be so-called direct stacking, in which the upper structure is stacked at the position of the lower structure, or the upper structure is stacked on a plurality of lower structures. It may be staggered. FIG. 6 is a schematic diagram showing a state in which a slope structure is constructed according to the present invention. In FIG. 6, the structures are stacked in a direct stack.

  In FIG. 6, the stacking of structures is shown in a state in which the slope structure is constructed with a structure of one horizontal row, but the slope structure is constructed by arranging a plurality of rows of structures in the depth direction. Also good. FIG. 7 shows a state in which a slope structure is constructed by staggering two rows of structures. In this case, adjacent structures may be connected by an appropriate means.

  In the construction of the slope structure according to the present invention, since a flexible cylindrical reinforcing material is used, it is possible to construct a slope structure according to the slope even when the slope is curved. It has the characteristics, and the slope construction method can be easily implemented without any hindrance in any situation.

  The construction of the slope structure of the present invention can be effectively applied to the cut slope, but the construction of the slope structure of the present invention can also be applied to the embankment slope. When constructing on the embankment slope, in all layers of the layered structure or appropriately selected layer, plate geogrid is connected to the structure by an appropriate means such as rope or binding band, and plate geogrid By embedding in the embankment side, it can be set as the stable embankment slope structure. FIG. 8 shows a state where a plate-like geogrid is coupled to the structure of the present invention.

  Vegetation is possible for the structure made of the reinforcing material of the present invention. The constructed slope is vegetated by the vegetation of the structure, and as a result, the stability of the slope and the deterioration of the structure can be prevented. For vegetation of the structure, a method of inserting a vegetation sheet into the inner surface of the structure may be employed, or vegetation spraying may be performed on the surface of the structure.

  The vegetation sheet in the present invention means a sheet that can grow vegetation, such as a sheet-like or mat-like one that supports plant seeds before installation, and a plant that can support plant seeds after installation. For example, the seed and the granulated fertilizer may be sandwiched and bonded in two sheets of a water-soluble or water-fragile sheet and supported by a reinforcing net. Examples of the two sheets include water-soluble films such as polyvinyl alcohol, and materials such as water-fragile nonwoven fabric and paper.

  The vegetation spraying can be performed, for example, by mixing seeds, fertilizer, fibers, soil, or the like with water and spraying them with a pump or a spray gun.

  According to the present invention, there is provided a construction method of a slope structure using a structural material that is not corrosive, lightweight, can be assembled on site, and can be easily constructed according to the shape of the slope.

  The slope construction method provided by the present invention can be applied to riverbanks and coasts as a measure for preventing erosion.

  The construction of a slope structure provided by the present invention has a feature that a slope structure can be constructed in accordance with the slope even when the slope is drawing a curved surface. Can also respond.

  The slope construction method provided by the present invention can be suitably applied to a cut slope, but can also be applied to a fill slope.

1. Geogrid 2, 2 '. 2. Geogrid edge 3. Connection member 4. Cylindrical reinforcement Filler 6. Structure 7 Crushed stone8. Slope 9 Pile 10. Anchor pin

Claims (6)

Opened up and down obtained by joining the ends of a plate-like geogrid, which is a net-like product obtained by processing a thermoplastic resin net or a resin plate that is uniaxially or biaxially processed into a lattice. A slope construction method in which a cylindrical reinforcing material is laminated with a structure filled with soil as a filler.   The slope construction method according to claim 1, wherein the laminated structure includes a structure having greater water permeability than a structure constituting the main structure. Slope construction method according to claim 2, sand before KiToru aqueous large structures, gravel, gravel, crushed stone, is filler selected from Wariguri ore and boulders, characterized in that it is filled.   The slope construction method according to any one of claims 1 to 3, wherein at least a part of the structure is filled with a filler selected from soil cement, mortar, and concrete.   The slope construction method according to any one of claims 1 to 4, wherein the stacked structures are connected to each other or to a slope by piles and / or anchor pins.   The one or more layers of the laminated structure have a plate-like geogrid combined with the structure, and the plate-like geogrid is embedded in a slope. The slope construction method in any one of -5.

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