JPH10121480A - Slope formation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to form a slope face having safety and durability, while using inexpensive materials, though simple work, by placing or stretching over the slope surface a honeycomb woven fabric as a reinforcement member woven with thermoplastic resin fiber threads. SOLUTION: A honeycomb woven fabric 1 is placed or stretched over a slope face 2 formed by banking or cutting and to be protected or planted, and the fabric 1 is secured with anchor pins 4 or the like. In the case the growth of plants is to be artificially forced, a layer 3 of earth brought from another place (foreign earth layer 3) is formed by spraying and settling foreign earth material or mixture of cement material, seeds 5, fertilizer, earth improvement agent, etc., from above the honeycomb woven fabric 1 secured to the slope face 2. In this case, a relatively uniform thickness, with respect to the surface of the honeycomb oven fabric 1, of the foreign earth layer 3 may be maintained due to the three-dimensional structure of the honeycomb fabric 1. The slope face 2 formed as described above has a great resistance against the foreign layer 3 being displaced or being washed away, and protection of the slope face and plant growing are secured. This makes it possible to make work simple using inexpensive materials to form a slope face having stability and durability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a slope for protecting and greening an embankment slope, a cut slope, and the like used in embankment construction, residential land development, road construction, and the like.

[0002]

2. Description of the Related Art Conventionally, various reinforcing materials have been used in a slope reinforcing method of forming a slope, protecting and vegetating, and various forms of net materials, sheet materials, frame materials and the like have been developed. It has been done. In general, net materials are often used for reinforcing materials that suppress the loss of customer soil materials such as earth and sand, spray materials, seeds for vegetation, etc. in the early stages of construction, but this net material usually has a thickness of 1 mm. Because it is a two-dimensional structure that is woven in a plane with less than two dimensions, it only stops the soil material entangled with the surface of the net material, especially for cutting slopes with steep slopes. It was missing and inapplicable.

[0003] Therefore, various three-dimensional structures can be seen as sheet members having a high soil retention force used when forming a slope. For example, cardboard paper, paperboard, non-woven fabric, cloth, steel plate,
A slope greening method using a frame material that forms cells by connecting the tape-like base materials made of metal lath etc. and connecting the adjacent parts (Japanese Patent Publication No. 62-53651), a belt-shaped paper with a predetermined width is oriented vertically For protecting and revegetating a slope using frame paper of a honeycomb structure configured so as to have a net-like shape in plan view
(Japanese Patent Publication No. 64-9416), or for the protection of a slope by weaving by weaving a strand of 3 to 30 mm in width made of paper or non-woven fabric, etc., as a weft and wrapping it with a large number of warps to a size smaller than the strand width. A vegetation net (Japanese Patent Publication No. 5-486), a vegetation net in which a plurality of weirs woven to a predetermined height are arranged in a lateral direction with respect to a slope (Japanese Patent Application Laid-Open No. 3-158522), a Russell weave The vegetation net is formed by knitting each mesh at a rhombus, each side constituting the mesh has a predetermined height, and forms a mooring portion of a vegetation base material (Japanese Unexamined Patent Application Publication No.
-183820), a number of belt-shaped net materials are aligned in parallel, adjacent net materials are connected at a predetermined interval along the length direction, and a slope protection net exhibiting a honeycomb structure when expanded ( Japanese Utility Model Laid-Open No. 3-72947), and a slope construction method using a sheet-like material having a large number of protrusions formed by deep drawing of a mesh structure woven fabric (Japanese Patent Laid-Open No. 3-247815) has been disclosed. I have.

[0004] Among them, in the case of a slope forming method using a net member in which the inside of the cell surrounded by the frame material is used as a mooring portion of the soil material, a wide frame material is required when a thick soil layer is required. It is possible to cope with it, and depending on the setting of the mesh ratio and the opening ratio of the frame material, it is effective in that the loss of the soil due to rainfall can be suppressed, but the fixing means for forming the cells is complicated, It has been pointed out that it is difficult to cope with wide net materials, has poor mechanical strength, and is difficult to adjust to the slope. On the other hand, in the case of forming a three-dimensional structure by forming irregularities on a two-dimensional knitted woven fabric or the like, the production speed is low, such as low production efficiency, and a special manufacturing device capable of handling a wide width is required. It is undeniable that the cost will increase.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is simple in construction using inexpensive members and has excellent stability and durability. It is intended to provide a method for forming a slope having the same.

[0006]

According to the present invention, a honeycomb woven fabric made of thermoplastic fiber yarn is laid or stretched on a slope as a reinforcing material, and if necessary, a soil layer is attached to the surface of the honeycomb woven fabric. And a method of forming a slope, further comprising laminating a coating material.

The honeycomb woven fabric as a reinforcing material used here is
A woven thermoplastic fiber yarn with a total fineness of 50 to 1,000 dr, a mesh density of 20 to 45 yarns / inch, each honeycomb structure unit having a side of 5 to 20 mm, and a thickness of 1.5 to 5 mm. Body.

[0008] As a thermoplastic resin to be a thermoplastic fiber yarn, for example, ethylene, propylene, 1-butene, 4-
Homopolymers or mutual copolymers of α-olefins such as methyl-1-pentene, or polyolefin resins composed of copolymers of these α-olefins and other comonomers, nylon 66, nylon 6, aromatic polyamide, etc. And polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene isophthalate, polyvinylidene chloride resins, and acrylonitrile resins.

[0009] The shape of the thermoplastic fiber yarn is not particularly limited, and a monofilament having a general circular cross section, a monofilament having a continuous yarn shape or a modified cross section, a multifilament obtained by bundling low fineness filaments, and a film formed by slitting a film. Single-layer fiber such as flat yarn obtained by
Alternatively, the yarn may be a laminated or core-sheath composite fiber composed of a high melting point resin as a core component and a low melting point resin having a melting point of about 10 to 30 ° C. lower than the melting point of the core component as an outer layer component. Here, these yarns preferably have a total fineness of 50 to 1,000 dr. That is, since the yarn is fixed to the slope as a woven fabric as described later, the yarn is set as a range that satisfies sufficient strength, moderate stiffness, and ground followability.

In the present invention, while the above-described slope formation is a basic construction method, the upper surface of the soil layer is further covered with a covering material such as a wire mesh, a fiber net, a mesh sheet, a nonwoven fabric mat, a processed paper, a straw, It can also be fixed with an anchor pin or the like.

[0011] Also, some of the honeycomb woven fabric and the coating material as a reinforcing material used in the present invention include fibers which decompose or disintegrate with time, for example, plant fibers such as cotton, hemp, flax, etc., and animals such as wool and silk. Regenerated fibers such as fiber, rayon, cupra, etc., or biopolyesters obtained by culturing microorganisms, those utilizing synthetic polymers of aliphatic polyesters or polyvinyl alcohol, organic substances which microorganisms prefer to ingest into synthetic resins, and organic metal salts A yarn composed of a synthetic fiber spun from a composition containing an oil or an oil agent or the like, or an aggregate thereof (spun yarn, multifilament, etc.) can be used.
Materials containing these decomposing or disintegrating fibers, especially when used in the vegetation method, do not decompose or disintegrate with the growth of vegetation, and as a result, do not inhibit vegetation growth,
In addition, the effect that vegetation roots invade into the slope ground and are easily fixed can be expected.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The method for forming a slope according to the present invention reinforces a slope by using a mesh fabric of a honeycomb fabric at the time of forming a slope to improve the ability to capture soil material. , The main requirement is to use honeycomb fabric as the mesh body. Here, the honeycomb fabric is a term specifically defined in a fiber term (fabric section) of Japanese Industrial Standard JIS-L0206 (1976), and it is referred to as "a honeycomb structure with a change in texture. Weaving one. Also called woven. "
It is explained. FIG. 1 shows a plan view of a honeycomb fabric.

The honeycomb fabric is a fabric that can be woven in series by a Sulzer-type loom or the like, is capable of coping with a wide width of 300 cm or more, and has a three-dimensional structure in which irregularities are formed on the surface. Therefore, this three-dimensional structure acts on the stabilization of the soil material on the slope. Thus, in the present invention, in order for the honeycomb woven fabric used for forming the slope to exhibit a sufficient effect, as described above, the driving density of the warp yarn is 20 to 45 yarns / inch, and one side (A) of each honeycomb structural unit is used. ), (A ') is 5
It is preferable to set the thickness to 20 mm and the thickness 1.5 to 5 mm. Those in this range are excellent in dimensional stability, tough and flexible, and can be formed into a mesh body having good handleability during construction.

Further, the honeycomb fabric used in the method of the present invention can be subjected to a fixing treatment at the warp intersection of the fabric as required. For this fixing treatment, for example, using a vinyl chloride resin, a phenol resin, an epoxy resin, a polyester resin, a polyamide resin, a low-melting-point polyolefin resin, or the like, and applying a thin layer to such an extent that the mesh of the honeycomb fabric is not closed, or Resin treatment such as drying after spraying these liquid polymers is performed. If the woven fabric is composed of composite fibers, heat treatment is performed using a heat treatment device such as an infrared irradiation type or a hot air oven type in a temperature range below the melting point of the high melting point component and above the softening point of the low melting point component. Thereby, heat fusion can be performed without impairing the drawing effect of the fiber.

The method for forming a slope according to the present invention using the above-described honeycomb fabric will be described below with reference to the drawings. 2 to 4 show an example of a method of forming a slope according to the present invention. In the figure, 1 is a honeycomb fabric, 2 is a slope, 3 is a soil layer, 4 is an anchor pin, 5 is a seed, and 6 is a covering material.

First, a honeycomb fabric 1 is laid or stretched on a slope 2 to be protected or greened by embankment or cut and fixed with anchor pins 4 or the like (FIG. 2). If you leave it to natural greening,
This completes the slope formation, but in order to artificially promote greening, cement material, seeds 5, fertilizer, soil modifier, etc. were mixed on the honeycomb fabric 1 fixed to the slope 2. The soil material 3 is formed by spraying the soil material or the like to form the soil layer 3 (FIG. 3). In this case, the three-dimensional structure of the honeycomb fabric 1 can maintain a relatively uniform thickness of the soil layer 3 based on the surface thereof. Slope 2 thus formed
In this case, the resistance of the soil layer 3 to movement and erosion is great, and stable slope protection and greening can be secured. When it is necessary to further protect the sloped soil layer in view of the amount of rainfall and slope slope, the covering material 6 is laminated thereon (FIG. 4).

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below by way of specific examples.

Example 1 A monofilament having a fineness of 500dr, which had been subjected to a draw orientation treatment after melt-spinning a polypropylene resin, was used as a warp yarn, and a punching density of 36 × 36 / inch was obtained by a Sulzer type loom having a maximum weave width of 360 cm. 7.5m on each side of each honeycomb unit
m, a 2.2 mm thick honeycomb fabric was woven. When the tensile strength of the honeycomb fabric was measured in accordance with Japanese Industrial Standard JIS-L1085, it was 75 kgf / 5 cm in the warp direction and 68 kgf / 5 cm in the weft direction. The honeycomb fabric 1 was laid on an embankment slope having an average inclination angle of 25 °, and fixed with anchor pins 4 at intervals of about 90 cm (FIG. 2). In this slope forming method, since the honeycomb fabric has a moderate stiffness and flexibility and has high strength, laying workability is extremely good, and the runoff of the slope 2 surface soil can be effectively prevented. .

Example 2 The honeycomb woven fabric used in Example 1 was immersed in a phenolic resin solution, contacted with a roll to remove excess liquid, and then dried and subjected to a sealing process. Then, after forming a slope in the same manner as in Example 1, a soil layer mixed with seeds, fertilizer, and a soil modifier was sprayed to form a soil layer 3 having a thickness such that the honeycomb fabric surface was almost uniformly hidden. (FIG. 3). According to this method of forming a slope, the honeycomb fabric has sufficient water permeability and excellent creep characteristics without any misalignment of the structure, the workability of laying is extremely good, and the stable soil layer 3 can be maintained. Was.

Example 3 Polypropylene having a melting point of 138 ° C. was used as a resin for the core layer, and an ethylene-acrylic acid copolymer having a melting point of 108 ° C. (AA content)
10%) as the resin of the outer layer, and the mixture is fed into two series of extruders, and the composite monofilament having a fineness of 650dr, which has been subjected to drawing and orientation treatment after being spun from the composite nozzle at a core-sheath ratio of 8: 2, is used as the warp yarn Then, after weaving the honeycomb fabric with the same specifications, the honeycomb fabric was passed through a hot-air oven set at 112 ° C., and the honeycomb fabric 1 was subjected to the sealing process to form a slope in the same manner as in Example 2. (Fig. 3). The tensile strength of this honeycomb fabric was 80 kgf / 5 cm in the warp direction and 72 kgf / 5 cm in the weft direction.
According to this method of forming a slope, the honeycomb fabric has sufficient water permeability and excellent creep characteristics without any misalignment of the structure, the workability of laying is extremely good, and the stable soil layer 3 can be maintained. Was.

Example 4 Honeycomb fabric woven with the same standard as that of Example 1 except that one of the two wefts of a polypropylene monofilament is replaced with a spun rayon yarn (fineness: 350dr) and the reinforcing material is used. Using No. 1, a soil layer containing a seed 5, a fertilizer, a soil modifier and the like was sprayed to form a soil layer 3. Next, a net made of monofilament having a fineness of 500dr obtained by melt-spinning a biodegradable resin of a starch-compounding type (trade name “Eco Fine” manufactured by Hagiwara Kogyo Co., Ltd.) 3 was covered from the upper surface, and further fixed from above by an anchor pin to form a slope (FIG. 4). In this slope forming method, since the honeycomb woven fabric 1 as a reinforcing material and a part of the covering material 6 both contain fibers that degrade with time, the decomposition of the fibers proceeds with the growth of the vegetation, and the material becomes It did not hinder the growth of vegetation, and a stable greening slope was obtained.

Comparative Example Using a multifilament consisting of polyester fibers having a total fineness of 600 dr / 48 fil, a Russell knitting machine was used to shake the pattern yarn at a density of 5 chains / cm with a ground yarn interval of 9 yarns / inch and a pattern yarn of 2/9 inch. When a slope was formed in the same manner as in Example 2 using a net-like material having a thickness of 0.8 mm, the thickness of the soil layer varied greatly in this method of forming the slope, and the soil fell off over time. Many runoffs were observed, and the slope stability was insufficient.

[0023]

As described above, the method for forming a slope according to the present invention uses a honeycomb woven fabric having a specific weave as a reinforcing material for a mesh body laid or stretched on an embankment slope or a cut slope. Since the honeycomb fabric itself can be woven in a series on a conventional loom, the production efficiency is good, and it satisfies sufficient strength, moderate stiffness, and ground followability that are the requirements of an effective mesh body for slope formation. It is easy to obtain, and can handle wide and long objects required as civil engineering materials, so that it is excellent in handleability.

The slope using the honeycomb fabric can easily and uniformly attach the soil layer, and on the slope after the construction, the three-dimensional structure of the honeycomb fabric reduces the soil. Since it is easily entangled with the tissue, it is effective in preventing the soil layer from sliding down, collapsing, and spilling out, so that the slope becomes stable over a long period of time.

[Brief description of the drawings]

FIG. 1 is a plan view of a honeycomb fabric used in a method of forming a slope according to the present invention.

FIG. 2 is a partial cross-sectional view illustrating an example of a method of forming a slope according to the present invention.

FIG. 3 is a partial cross-sectional view illustrating another example of the method for forming a slope according to the present invention.

FIG. 4 is a partial cross-sectional view showing another example of the method for forming a slope according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb fabric A (A ') One side of honeycomb structure unit 2 Slope 3 Guest soil layer 4 Anchor pin 5 Seed 6 Coating material

Claims (2)

[Claims] 1. A method of forming a slope, comprising laying or stretching a honeycomb woven with thermoplastic fiber threads as a reinforcing material on the slope. 2. The honeycomb woven fabric as a reinforcing material has a total fineness of 50 to 1,
000dr thermoplastic fiber yarns, the density of warp yarns is 20-45 yarns / inch, each side of the honeycomb structure unit is 5-20mm, and the mesh body is 1.5-5mm thick. The method for forming a slope according to claim 1, which is used.