JPS63268810A - Fortifying of ground - Google Patents

Abstract

PURPOSE:To fortify the ground and drain water in the ground by a method in which spirally rolled filament yarns are connected interlockingly in parallel and buried under the ground. CONSTITUTION:Rigid filament yarns are spirally rolled to form a spiral unit 2, and a number of the units 2 are connected with each other. A core wire 5 is thrust through the connected portions of the units 2 to make up a planar or cylindrical spiral mesh 1. The spiral mesh 1 is buried under the soft ground or the ground layer 6 wherein counter measures for land slide is needed. The degradation of the banking, etc., can thus be prevented and draining of water in the ground can be made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention uses a spiral mesh. The present invention relates to a method of improving soil, particularly a method of strengthening the ground and improving the water quality of tennis courts, etc., by using the spiral mesh.

[Prior art] In soft ground, its supporting capacity decreases, causing so-called ground subsidence, and in landslide areas, the action of gravity causes soil to move from high places to low places. There is a strong tendency to move the land, causing landslides and collapse phenomena on slopes. When the surface is heavily saturated with water, it can cause destruction of road and pavement surfaces, and in cold regions, it can also cause frozen ground.

Recently, in the construction field, the development of new materials such as carbon fibers being mixed into concrete has been actively progressing.

In the field of civil engineering, Japanese Patent Application Laid-Open No. 56-89602 discloses a technique for preventing cracks from forming on the pavement surface by laying a nonwoven fabric sheet between the ground layer and the pavement layer. Publication No. 56-163301 discloses a technique for preventing a decrease in the strength of roadbeds, etc. by mixing I fibers such as nylon fibers into soft elastic materials such as epoxy resins to form a waterproof adhesive layer. , recently, with a similar idea,
It has been proposed and reconsidered to improve soft ground by laying polymeric fiber materials between soil and asphalt, but fiber materials are those woven into sheets or mesh. There are various shapes such as mesh, but it is not always good because it is too porous and the contact area with the stratum is too small, and sheet-like woven ones are time-consuming to manufacture. may have insufficient drainage.

[Problems to be Solved by the Invention] The present invention provides a method for reinforcing soft ground, landslide areas, embankments, river embankments, tennis courts, roads, playgrounds, etc., and increasing water resistance. The purpose is to provide suitable technology.

The above and other objects and novel features of the present invention include:
It will become clear from the description of this specification and the accompanying drawings.

[Means for Solving the Problems] The present invention has been completed to achieve the above object, and the method of the present invention involves meshing a large number of single spirals made of filament threads in parallel, and The method is characterized in that a three-dimensional, spiral or planar spiral mesh formed by connecting these individual spirals by inserting a core wire through a common hole is buried in the ground.

[Function] The spiral single sheet used in the present invention has good water permeability and air permeability, as it was developed as a canvas for paper making, and since it is made of filament yarn, it is resistant to erosion as a fiber. By burying it in the soil, even when the soil becomes soft due to heavy rain, the water in the soil can be drained well, making it suitable for the above-mentioned land improvement. understood.

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

Figure 2 shows a spiral mesh 1 as shown in Figure 1.
This is a perspective view of a main part of a spiral unit 2 constituting a spiral unit 2, which is constructed by forming a rigid filament thread into a spiral shape with a large number of flat spiral parts 3 continuously formed over its entire length as shown in Figure 2. As shown in Figures 1 and 3,
For example, by arranging a large number of spiral units 2 in parallel, inserting the respective spiral parts 3 of the spiral units 2 in adjacent rows into each other at their arcuate portions 3', and inserting the core wire 5 into the interlocking common hole 4 formed. , a planar spiral mesh l as shown in FIG. 1 can be constructed.

At this time, a planar spiral mesh 1 having an appropriate width and length can be obtained depending on the length of the spiral single body 2 and the number of parallel spirals 2.

The filament yarn may be a synthetic H&male monofilament yarn such as polyester or polyamide.

Further, the core wire 5 is made of synthetic resin such as polyamide, for example.

Next, a few examples of earthworks using the spiral mesh of the present invention will be explained.

Figure 6 shows an example of a spiral mesh buried in a stratum that requires landslide protection, and Figure 7 shows a cross section of the main part.

In these figures, 6 is the stratum, l is the spiral mesh,
The spiral mesh 1 may be a planar spiral mesh as shown in FIG. 1 or a cylindrical spiral mesh as shown in FIG. 5.

In the case of a flat spiral mesh, drainage follows the spiral mesh in a zigzag pattern.

In addition to this, in a cylindrical spiral mesh, the interior 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. 3.

Instead of the cylindrical spiral mesh, a rectangular cylindrical spiral mesh as shown in FIG. 12 may be used, or a triangular spiral mesh as shown in FIG. 13 may be used. Furthermore, as shown in FIG. 14, a spiral mesh may be used.

A spiral mesh is preferable because it can increase resistance to earth pressure.

FIG. 8 shows an example where the spiral mesh 1 according to the present invention is applied to tennis neat, 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 geological layer 6 below the pavement layer 7. This example shows an example in which a flat spiral mesh 1 is laid in the middle of the geological formation, but the spiral mesh 1 may be laid between the pavement layer 7 and the geological layer 6, or the spiral mesh 1 may be laid between the pavement layer 7 and the geological layer 6. 1 may be formed not only in one layer but also in multiple layers, and various other modifications are possible. For example, crushed stone is laid on top of the stratum 6 to form a crushed stone layer, and Suba Iral mesh is laid on top of that. Variations are possible.

Figure 9 shows an example of application to soft ground countermeasures.

An example in which the spiral mesh 1 is buried (laid) in the soft layer 8 is shown. In Fig. 9, 9 indicates the load of embankment etc.

Figure 10 shows the slope (artificial slope of cutting or embankment)
In Figure 10, 10 is a broken stone,
l! is back-filled concrete! Reference numeral 2 is made of uragome chestnut stone, and has a preparation hole in which the spiral mesh 1 can be buried, the spiral mesh 1 is buried there, and water is drained through the spiral mesh 1.

Figure 11 shows an example of application to a river embankment.
13 is an embankment, 14 is an embankment, and the spiral mesh 1 is buried in the embankment 13.

[Effects of the Invention] According to the method of the present invention, when a spiral mesh is used to build an embankment, it becomes strong against lateral forces and has the property of not easily collapsing, and since it is made of fibers, it is resistant to erosion. Even in cases where the soil becomes soft even after heavy rainfall, spiral mesh has relatively good water permeability compared to ordinary woven or non-woven fabrics, so the spiral mesh can be used to drain drainage channels. It plays its role and improves drainage,
Therefore, it is useful for improving (strengthening, water) soft ground, landslide areas, embankments, river embankments, etc., and prevents water from stagnating on the ground surface even in areas such as tennis courts, other playgrounds, and roads. We were able to resolve various problems.

Although the invention made by the present inventor has been specifically explained above based on examples, it goes without saying that the present invention is not limited to the above-mentioned examples and can be modified in various ways without departing from the gist thereof. Nor.

For example, as shown in FIG. 4, by inserting the core wire 15 into the spiral portion 3 in the same way as the core 115, the water permeability can be controlled, and the spiral mesh 610 can be controlled, and the spiral mesh can be used. You can take advantage of the advantages of

[Brief explanation of the drawing]

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 single spiral, Fig. 3 is a side view of the spiral mesh, and Fig. 4 shows another example. FIG. 5 is a schematic perspective view of a cylindrical spiral mesh, FIG. 6 is an explanatory diagram of an example of the method of the present invention, FIG. 7 is a cross-sectional view of the same essential parts, and FIG. An explanatory diagram showing another example of the method of the invention, FIG. 9 is an explanatory diagram showing still another example of the method of the invention, and FIGS. 10 and 11 each show other application examples of the method of the invention. The explanatory drawings, FIG. 12, FIG. 13, and FIG. 14 are explanatory drawings showing other application examples of the spiral mesh used in the present invention, respectively. 1・Φ・Spiral mesh 2@・Single spiral 3・・Fist spiral part 4・・Meeting common hole 5φ・・Core line 6・・Ground layer 7・・・Kist pavement layer 8・・Soft layer patent application Person: Yoshihiro Sato, Patent Attorney, Nippon Felt Co., Ltd. Figure 1 Figure 2 Figure 5 tHG Figure 7 Figure 8 Figure 49 Figure 10 Figure 11

Claims (1)

[Scope of Claims] 1. A three-dimensional, spiral or planar shape formed by connecting a large number of single spirals made of filament threads in parallel and meshing, and connecting these single spirals by inserting a core wire into a common hole created by the meshing. A method for strengthening and draining soil or similar civil engineering structures, characterized by burying a spiral mesh underground. 2. The method according to claim 1, wherein the civil engineering structure similar to the ground is a landslide site. 3. The method according to claim 1, wherein the civil engineering structure similar to the ground is an embankment. 4. The method according to claim 1, wherein the civil engineering structure similar to the ground is a river embankment. 5. The method according to claim 1, wherein the civil engineering structure similar to the ground is a tennis court, a park, or a road. 6. The method according to claim 1, wherein the spiral mesh is a spiral mesh cylinder configured in a cylindrical shape. 7. The method according to claim 1, wherein the spiral mesh is formed by winding up a band-shaped spiral mesh in its width direction.