JPH0762341B2 - Land improvement method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for improving land using a spiral mesh, and in particular, by using the spiral mesh, the ground is reinforced and water is used in tennis courts and the like. On how to improve.

[Conventional technology]

In soft ground, the bearing capacity decreases, causing so-called subsidence, and in landslide areas, there is a tendency to move the soil from high places to low places due to the action of gravity. , Causing landslides, causing collapse phenomenon on slopes, weak against lateral force on embankments and easy to collapse, while on roadbeds, tennis courts, playgrounds, etc., when the ground surface is saturated with water, Cause the destruction of, and also cause frozen soil in cold regions.

Recently, in the construction field, the development of new materials has been actively promoted by mixing carbon fiber and the like into concrete.

Also in the field of civil engineering, JP-A-56-89602 discloses a technique of laying a non-woven sheet between a ground layer and a pavement layer to prevent cracks from occurring on the pavement surface. As disclosed in Japanese Laid-Open Patent Publication No. 56-163301, a technique of mixing a fiber material such as nylon fiber with a soft elastic material such as an epoxy resin to provide a waterproof adhesive layer to prevent the strength of a roadbed from being deteriorated. At the same time, based on the same idea, it has been proposed and reviewed to improve the soft ground by laying a polymeric fiber material between soil and asphalt. There are various forms such as woven fabrics and mesh-like ones, and the fact that they are mesh-like does not always mean that they are too porous, and the contact area with the ground layer is too small, and those woven into sheets are not suitable for manufacturing. Tedious and generally woven It is or it is insufficient drainage.

[Problems to be Solved by the Invention] The present invention is suitable to reinforce soft ground, landslides, embankments, river embankments, tennis courts, roads, playgrounds, and other places to reinforce them and increase water resistance. The purpose is to provide such technology.

The above and other objects and novel characteristics of the present invention are
It will be apparent from the description of the present specification and the accompanying drawings.

[Means for Solving the Problems] The present invention has been completed in order to achieve such an object, and the method of the present invention was made by meshing a plurality of spiral single filament filaments in parallel and meshing them. It is characterized in that a three-dimensional, spiral, or planar spiral mesh formed by connecting cores through the common hole and connecting the spirals is buried in the ground.

[Operation] The spiral mesh used in the present invention has good water permeability, air permeability, etc., especially as it was developed as a canvas for papermaking, and since it is made of filament yarn, it is resistant to erosion as a fiber, Even when it rains and the soil becomes soft, it is possible to drain the water in the soil well by burying it in the soil, and it was found to be suitable for the improvement of land as described above. .

Example Next, the method of the present invention will be described in detail according to an example shown in the drawings.

FIG. 2 shows a spiral mesh 1 as shown in FIG.
FIG. 2 is a perspective view of a main part of the spiral simple substance 2 that constitutes a spiral filamentary yarn formed by continuously forming a number of flat spiral parts 3 over the entire length thereof as shown in FIG. As shown in FIGS. 1 and 3,
For example, the meshing common hole 4 formed by arranging a large number of the spiral single bodies 2 in parallel and inserting the respective spiral parts 3 of the spiral single bodies 2 in adjacent rows into each other at their arcuate portions 3 '
By inserting the core wire 5 into the
The planar spiral mesh 1 can be configured.

At that time, the planar spiral mesh 1 having an appropriate width and an appropriate length can be obtained according to the length of the spiral simple substance 2 and the number of parallel spirals.

As the filament yarn, for example, monofilament yarn of synthetic fiber such as polyester or polyamide can be used.

The core wire 5 is made of synthetic resin such as polyamide.

Next, a few examples of earthwork using the spiral mesh of the present invention will be described.

FIG. 6 shows an example in which a spiral mesh is embedded in a stratum requiring countermeasures against landslides, and FIG. 7 shows a cross section of the relevant part.

In these figures, 6 is a stratum, 1 is a spiral mesh,
The spiral mesh 1 may be a flat spiral mesh as shown in FIG. 1 or a cylindrical spiral mesh as shown in FIG.

In the case of a planar spiral mesh, it is drained in a zigzag pattern according to the spiral mesh.

In addition to this, in the cylindrical spiral mesh, the inside of the cylinder also serves as a drainage channel.

The cylindrical spiral mesh shown in FIG. 5 can be obtained by connecting both ends of the planar spiral mesh shown in FIG. 1 in the same manner as in FIG.

Instead of the cylindrical spiral mesh, it may be a rectangular tubular spiral mesh as shown in FIG. 12, or may be a triangular spiral mesh as shown in FIG. 13, and further, As shown in FIG. 14, a spiral spiral mesh may be used.

The spiral-shaped spiral mesh is preferable because the resistance to the ground pressure can be increased.

FIG. 8 shows an example applied to a tennis court, other sports fields, parks, roads, etc., and shows an example in which the spiral mesh 1 according to the present invention is laid in the formation 6 below the pavement layer 7. In this example, the planar spiral mesh 1 is laid in the formation 6, but the spiral mesh 1 may be laid between the pavement layer 7 and the formation 6, or the spiral mesh 1 Not only it may be formed in multiple layers, but various other modifications are possible, such as laying crushed stone on the formation 6 to form a crushed stone layer and laying a spiral mesh on it. is there.

FIG. 9 shows an example applied to the soft ground countermeasure, and the soft layer 8
An example in which the spiral mesh 1 is embedded (laid) therein is shown. In FIG. 9, reference numeral 9 indicates a load such as embankment.

Fig. 10 shows the spiral mesh 1 applied to the position where the drainage hole is generally provided on the slope (cutting or artificial slope of embankment). In Fig. 10, 10 is a rubble stone and 11 is a back Embedded concrete, 12 is a back granite stone, and a preparation hole in which the spiral mesh 1 can be embedded is provided in advance, and the spiral mesh 1 is embedded therein, and the spiral mesh 1 is used for draining.

Figure 11 shows an example of application to a river bank, and in the same figure, 13
Is an embankment, and 14 is an embankment, and the spiral mesh 1 is embedded in the embankment 13.

[Effect of the Invention] According to the method of the present invention, by using a spiral mesh, when embankment or the like is performed, it becomes strong against the force from the side and exhibits the property of being hard to collapse, and since it is a fiber, it is also strong against erosion However, even when the soil softens even if it rains, since the spiral mesh has relatively good water permeability as compared with ordinary woven cloth or non-woven cloth, the spiral mesh serves as a drainage channel. It provides good drainage, and therefore helps improve (strengthen, water) land such as soft ground, landslides, embankments, and river dikes, so that water does not stagnate on the surface of tennis courts, other sports grounds, and roads. We were able to solve various problems caused by water stagnation.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Nor.

For example, as shown in FIG.
By inserting 15 in the same manner as the core wire 5, the water permeability can be controlled, the hardness of the spiral mesh can be controlled, and the advantage of using the spiral mesh can be utilized.

[Brief description of drawings]

FIG. 1 is a partial plan view of a spiral mesh showing an embodiment of the present invention, FIG. 2 is a perspective view of a spiral simple substance, FIG. 3 is a side view of the spiral mesh, and FIG. 4 is a spiral mesh showing another example. FIG. 5 is a schematic perspective view of a cylindrical spiral mesh, FIG. 6 is an explanatory view of an example of a method of the present invention, FIG. 7 is a cross-sectional view of the same main portion, and FIG. 8 is a method of the present invention. FIG. 9 is an explanatory diagram showing another example, FIG. 9 is an explanatory diagram showing still another example of the method of the present invention, and FIGS. 10 and 11 are explanatory diagrams showing other application examples of the method of the present invention. FIG. 12, FIG. 13 and FIG. 14 are explanatory views showing other application examples of the spiral mesh used in the present invention. 1 ... Spiral mesh 2 ... Spiral unit 3 ... Spiral part 4 ... Common hole 5 ... Core wire 6 ... Formation 7 ... Pavement layer 8 ... Soft layer

Claims (1)

[Claims] 1. A three-dimensional, spiral-shaped, or planar spiral mesh in which a plurality of spiral single-pieces made of filament yarn are meshed in parallel, and a core wire is inserted into a common hole formed by the meshing to connect the spiral single-particles. A method for improving land, which comprises burying the ground in the ground.