JPH0638916Y2 - Soft ground surface treatment sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a soft ground surface layer treatment sheet in which the bonding strength of a mesh sheet is increased.

(Prior art) Ground improvement work is performed according to the purpose of use on soft ground in landfills, reclaimed land, etc., but on extremely soft ground, it is difficult to carry equipment and even pass people for ground improvement work. There is a case.

Then, as shown in FIG. 5, the soft ground surface treatment sheet (10) is spread on the soft ground surface, and the soft ground surface treatment sheet (10) is sprinkled with earth and sand to form the sheet (10).
The sheet (10) held by the frictional resistance due to the close contact structure between the soft ground surface and the soft ground surface disperses the load of earth and sand and stabilizes the ground surface layer. . The effect of stabilizing the soft ground obtained by the above means largely depends on the tensile force of the sheet (10).

As shown in FIG. 6 and FIG. 7, the soft ground surface treatment sheet comprises a mesh-like sheet (1) having a joining belt (3) attached to an end (2) thereof, and the soft ground to be developed. Multiple pieces are connected according to the size of the. The connection of the soft ground surface treatment sheet is performed by connecting the connection cord through holes (4) (4) formed in the connection belts (3) (3) of the sheets laid on the surface of the soft ground to the connection cord (5). It is carried out by tying the cord (5) for joining together.

Therefore, when tension is applied to the soft ground surface treatment sheet, the portions of the joining belts (3) and (3) that form the joining string passage holes (4) and (4) are strongly strengthened by the joining string (5). Will be pulled. Further, the tension is such that the mesh-like sheet (1) (1) is passed through the joining belt (3) (3).
The end portions (2) and (2) of the mesh sheet (1) and (2) are strongly pulled, and the constituent yarns at the end portions (2) and (2) of the mesh sheet (1) (1) are pulled out to Edge (2) (2)
Was sometimes damaged.

As shown in FIG. 8, there is also one in which the end portion (2) of the mesh-like sheet (1) is folded back to increase the strength of the end portion (2), but the mesh-like sheet (1 )
It was not possible to completely prevent the constituent yarns at the end (2) of the above from coming off.

(Problems to be Solved by the Invention) The present invention has been made in view of the above problems, and increases the strength of the end portion of the mesh-like sheet and damages the end portion when tension is applied to the sheet. It is an object of the present invention to provide a soft ground surface layer treatment sheet capable of reliably preventing the above-mentioned problems.

(Means for Solving the Problem) In order to achieve the above object, the soft ground surface treatment sheet according to claim 1 is a soft ground surface treatment sheet comprising a mesh sheet having a joining belt attached to an end thereof. The joining belt is attached to the mesh sheet via a reinforcing sheet woven at a density higher than that of the mesh sheet.

Further, in the soft ground surface treatment sheet according to the second aspect, a plate-like sheet solidified with a synthetic resin such as PVC is used as the reinforcing sheet.

(Operation) In the soft ground surface treatment sheet according to claim 1, since the joining belt is attached to the mesh sheet via the reinforcing sheet woven at a higher density than the mesh sheet, the soft ground surface treatment is performed. When tension is applied to the work sheet, the tension is dispersed by the reinforcing sheet, and a uniform load is applied to the entire end of the mesh sheet.

If the reinforcing sheet is a plate-like sheet that is solidified with a synthetic resin such as PVC as in the soft ground surface treatment sheet according to claim 2, the strength of the reinforcing sheet itself is further increased and the tension of the reinforcing sheet is increased. The ability to disperse will also increase.

(Example) Hereinafter, the soft ground surface treatment sheet of the present invention will be described in detail according to an example shown in the drawings.

The soft ground surface treatment sheet of the present invention comprises a mesh sheet, a joining belt and a reinforcing sheet.

The mesh sheet (11) is a synthetic resin sheet, as shown in FIGS. 1, 2 and 3, in which earth and sand and water are absorbed by the mesh sheet (11) and the mesh sheet (11). It is structured such that the mesh-like sheet (11) and the ground are brought into close contact with each other by entering into the formed grid to increase the resistance between the mesh-like sheet (11) and the ground surface. Further, as the fibers constituting the mesh sheet (11), synthetic fibers having high corrosion resistance and high tensile strength are preferable. Also,
Since the end portion (12) of the mesh sheet (11) has high strength, the weft density of the weft yarn is increased. In this example, a mesh sheet (11) having the following structure was used.

Width: 1500mm, material: Tetron, warp thread: 1000D, 2 threads, warp binding thread: 250D, 1 thread, weft thread: 1000D, 3x3 threads, lattice spacing: 7mmx6mm, tensile strength: 330kg / 5cm.

The joining belt (13) is made of a synthetic resin material and has a predetermined flexibility. On the edge of the joining belt (13), joining string through holes (14) are formed at predetermined intervals by being melted by heat or high frequency.

In this example, a joining belt (13) having the following structure was used.

Thickness: 1.5mm, Width: 100mm, Material: Tetron, Irregular double weave warp thread: 1000D-72F 281, Warp binding thread: 1000D-72F 124 thread, Warp core thread: 1500D-108F / 4, 24 Book, weft: 750D-72F / 2, between 40 / 30mm.

The joining belt (13) is attached around the mesh sheet (11) via a reinforcing sheet (17).

The reinforcing sheet (17) is a feature of the present invention,
The mesh sheet (11) is made of a cloth woven at a higher density. Preferred examples of the structure are shown below.

Width: 100-300mm, Material: Tetron Warp thread: 1500D, 2 weft threads: 1500D, 2 threads Tensile strength: 500kg / 3cm (800kg / 5cm or more) On one end upper surface of the reinforcing sheet (17) configured as above. The end portion (12) of the mesh sheet (11) is attached by sewing or welding over the entire width direction. On the other hand, the joint belt (13) is attached to the upper surface of the other end of the reinforcing sheet (17) over the entire width direction by sewing or welding, whereby the reinforcing sheet (17) is meshed sheet (11). And the joining belt (13).

As in the soft ground surface treatment sheet according to claim 2, the reinforcing sheet (17) may be a plate sheet fixed with a synthetic resin such as PVC. In this case, the strength of the reinforcing sheet (17) itself. And the performance of dispersing the tension of the reinforcing sheet (17) also increases.

As shown in FIG. 4, when a mesh-like sheet (11) in which the weft density of the weft of the end portion (12) is not increased is used, the end portion (12) is folded back and the joining belt ( The strength of the end portion (12) can be increased by sandwiching one end of the reinforcing sheet (17) with a cloth having the same structure as that of 13) and sewing or welding them.

Table 1 shows the results of a tensile test conducted on the soft ground surface treatment sheet of the above-mentioned example and the conventional soft ground surface treatment sheet.

(Two-point connection) The conventional soft ground surface treatment sheet is a mesh-like sheet having a joining belt attached to the end, and the joining belt and the mesh-like sheet are the same as those in this embodiment. It was used.

From the above results, a 30% increase in strength was observed.

(Effects of the Invention) As described above, in the soft ground surface treatment sheet according to claim 1, the joining belt is formed into a mesh sheet via the reinforcing sheet woven at a higher density than the mesh sheet. Installed. Therefore, when tension is applied to the soft ground surface treatment sheet, the tension is dispersed by the reinforcing sheet, and a uniform load is applied to the entire end of the mesh sheet. As a result, it is possible to reliably prevent damage to the ears.

Further, in the soft ground surface layer treatment sheet according to claim 2, since the reinforcing sheet is a plate-like sheet that is solidified by a synthetic resin such as PVC, the strength of the reinforcing sheet itself is further increased and the tension of the reinforcing sheet is increased. The performance to disperse is also improved.

[Brief description of drawings]

FIG. 1 is a partial plan view showing a state in which the soft ground surface treatment sheet of the present invention is connected, FIG. 2 is a sectional view showing a state cut along the line AB in FIG. 1, and FIG. 3 is a soft ground surface layer. Sectional drawing which shows another Example of a processing sheet, FIG. 4 is sectional drawing which showed the example of attachment of the reinforcing sheet when using the mesh-shaped sheet | seat in which the weaving density of the weft of the edge part is not increased, The figure is a cross-sectional view showing a state in which a soft ground surface treatment sheet is laid on soft ground, FIG. 6 is a partial plan view showing a conventional soft ground surface treatment sheet, and FIG. 7 is a cross-sectional view thereof. FIG. 8 is a sectional view showing another conventional example. Explanation of symbols 11 …… Mesh sheet, 12 …… End, 13 …… Joining belt, 17 …… Reinforcing sheet.

Claims (2)

[Scope of utility model registration request] 1. A soft ground surface layer treatment sheet comprising a mesh-like sheet having a joining belt attached to an end thereof, wherein the joining belt is meshed through a reinforcing sheet woven at a higher density than the mesh-like sheet. A soft ground surface treatment sheet characterized by being attached to a sheet. 2. The soft ground surface layer treatment sheet according to claim 1, wherein the reinforcing sheet is a plate-like sheet solidified with a synthetic resin such as PVC.