JP3560565B2 - Method of laying soil covering sheet and sheet barge used for laying - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for laying a soil covering sheet mainly laid when covering soil on soft ground.
[0002]
[Prior art]
Soft ground buried with fine-grained soil such as cohesive soil cannot obtain the strength required for use as land only by natural drying by sunlight, so it is necessary to improve the ground by paper drain method .
[0003]
In this case, since the working machine cannot be placed directly on the soft ground, a net or sheet of polyester or the like is laid on the soft ground and the soil is covered on it, so that the load of the working machine is reduced by the tension of the net or sheet. To improve the ground.
[0004]
However, in order to lay the above-mentioned earth covering sheet on soft ground, the supporting force of the soft ground is small, and generally people cannot be placed on the soft ground.
[0005]
Conventionally, water is spread on soft ground, a barge is floated, a roll of soil covering sheet is placed on the barge, and the soil covering sheet is pulled out and laid, or a sled is placed on soft ground, A sheet roll for soil covering was placed on the top, and the sheet for soil covering was pulled out and laid.
[0006]
However, when the area for laying the soil covering sheet is small, the ratio of these equipment costs to the total construction cost is large, which is economically problematic.
[0007]
[Problems to be solved by the invention]
The present invention relates to a method of laying a soil covering sheet, which can lay the soil covering sheet economically and safely, with relatively low equipment cost for laying the earth covering sheet, and a seat boat used for the laying. I will provide a.
[0008]
[Means for Solving the Problems]
According to the present invention, a sheet boat formed by forming each side of a polygon with a skeleton and stretching an impermeable sheet inside the area surrounded by each side is positioned on one side of a soil laying sheet laying area. , The earth covering sheet is spread on the sheet carrier, and if there is an already laid earth covering sheet, the contacted ends of the already laid earth covering sheet and the expanded earth covering sheet are connected to each other. After that, the above-mentioned towing means moves the sheet carrier to the position where the next soil covering sheet is to be laid, and the method of laying the earth covering sheet is performed repeatedly by laying the above-mentioned soil covering sheet. A framework of each side of the square is used as a floating body, or a high-density polyethylene sheet is used as an impermeable sheet.
[0009]
Still further, a sheet barge is used for laying a soil covering sheet in which each side of the polygon is formed by a skeleton, and a high-density polyethylene sheet is attached to a space surrounded by the skeleton so as to wrap the skeleton. .
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a method of laying a soil covering sheet according to the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a plan view of a seat barge 1 which is a working scaffold used when laying a soil covering sheet when covering soft ground by this laying method. This seat gantry 1 is formed of a substantially rectangular quadrilateral, and its long side L is slightly shorter than one side X of the earth covering sheet laying area 2 shown in FIG. 4, and its short side W is the earth covering sheet shown in FIG. 3 is slightly longer than the width Y.
[0012]
That is, in this embodiment shown in FIGS. 1 and 4, for example, the long side L of the sheet carrier 1 is set to 49.5 m with respect to one side X = 50 m of the soil covering sheet laying area 2. The short side W is set to 13 m with respect to the width Y = 10 m.
[0013]
The four substantially rectangular sides of the above-mentioned seat gantry 1 are composed of floating bodies, and are formed of styrofoam 5 reinforced with steel pipes 4 as shown in an enlarged side sectional view of a main part of FIG. The water-impermeable sheet 6 is stuck in a space surrounded by the frame and the frame so as to wrap the frame, and is shown at an appropriate interval on the water-impermeable sheet 6 in an enlarged side sectional view of a main part of FIG. As described above, the reinforcing steel pipe 7 is arranged, and the arrangement position is as shown by the steel pipe 7 in FIG.
[0014]
In addition, when a load is placed on the seat gantry 1, the seat gantry 1 sinks, and the soft ground and water around the skeleton of the substantially rectangular four sides of the seat gantry 1 enter the seat gantry 1. It is not necessary to use a floating body as long as it does not penetrate, but it is more preferable to use a floating body so that the seat barge 1 does not sink when a sheet of the seat barge 1 breaks. Further, the reinforcing steel pipe 7 may be arranged as needed, and may not be necessary.
[0015]
Next, the seat barge 1 having the above configuration is placed on one end of the soil covering sheet facility area 2 in FIG. 4, and is connected to a winch 8, which is a traction means disposed near the soil covering sheet facility area 2, by a rope 9. Thereafter, from the two sides of the sheet carrier 1 in the soil covering sheet laying area 2 where the short sides of the sheet carrier 1 face each other, the roll-shaped soil covering sheet 3 is spread on the sheet carrier 1 in the directions of arrows E and F by hand or the like. Ends which are extended by Z = 30 m and are in contact with each other, and in the case where the already laid soil covering sheet 3 is present, the already laid soil covering sheet 3 and the extended end which are in contact with each other. After connecting them, the rope 9 is taken up in the direction of arrow T by the winch 8 to move the sheet carrier 1 to the next laying position of the soil covering sheet 3, and the laying operation of the above soil covering sheet 3 is performed. By doing repeatedly Laying dog days sheet 3 is performed.
[0016]
Note that the soil covering sheet 3 may be manually spread on the sheet carrier 1 from one side of the sheet covering section 1 where the short side of the sheet covering section 1 faces the other side to the other side.
[0017]
As described above, various materials can be used as the water-impermeable sheet 6 to be adhered to the space surrounded by the frame of the sheet boat 1. For example, in this embodiment, a high-density polyethylene sheet is used. The high-density polyethylene sheet has high tensile strength, chemical resistance, and puncture resistance, and the connection at the center of the sheet boat 1 can be performed by joining with a heat-sealing machine. Since the specific gravity of the sheet material is lighter than that of water, buoyancy can be given to the seat barge 1.
[0018]
Further, the high-density polyethylene sheet is inexpensive, can be manufactured in a short time, is lightweight, and the material of the sheet is hard, so that even if a heavy object is mounted on the sheet, the rigidity of the sheet barge 1 causes the muddy surface of the soft ground of the seat barge 1. And the sinking on the water surface is small, and the on-site processing is easy.
[0019]
In the present embodiment, the seat gantry 1 is a substantially rectangular quadrilateral, but may be a polygon such as a triangle, a quadrangle, a pentagon, and a hexagon if necessary. In addition to the winch, a bulldozer, a backhoe or the like can be used as the towing means.
[0020]
【The invention's effect】
According to the method for laying the soil covering sheet of the present invention described above, a sheet barge for a working scaffold using a material that is inexpensive and has high rigidity and chemical resistance, and also has high resistance to piercing, can be easily installed on site. It is possible to repeat the work of laying the soil covering sheet on the sheet carrier and laying the soil covering sheet to move the seat carrier by towing means, economically and efficiently. It is possible to lay a soil covering sheet.
[Brief description of the drawings]
FIG. 1 is a plan view of a seat barge used when laying a soil covering sheet according to the laying method of the present invention.
FIG. 2 is an enlarged side sectional view of a main part of the seat barge shown in FIG. 1, which forms four substantially rectangular sides.
FIG. 3 is an enlarged side sectional view showing a main part of a steel pipe for reinforcement of the seat barge shown in FIG. 1;
FIG. 4 is a perspective view for explaining an operation procedure of laying a soil covering sheet in a soil covering sheet laying area using the sheet boat shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheet carrier 2 Covering sheet laying area 3 Covering sheet 4 Steel pipe 5 Styrofoam 6 Impermeable sheet 7 Reinforcing steel pipe 8 Winch 9 Rope

Claims (4)

Each side of the polygon is formed by a skeleton, and a sheet boat formed by stretching an impermeable sheet inside the area surrounded by each side is positioned on one side of the soil laying sheet laying area, and the traction means If there is an already laid earth covering sheet by connecting the earth covering sheet on the sheet carrier and laying the earth covering sheet already, the connected end portions of the already laid earth covering sheet and the expanded earth covering sheet are connected to each other, A method of laying a soil covering sheet, wherein the towed sheet carrier is moved to a position where the next soil covering sheet is to be laid by a towing means, and the above-described operation of laying the earth covering sheet is repeated. 2. The method of laying a soil covering sheet according to claim 1, wherein the framework of each side of the polygon is a floating body. 3. The method for laying a soil covering sheet according to claim 1, wherein a high-density polyethylene sheet is used as the water-impermeable sheet. A sheet carrier used to lay a soil covering sheet in which each side of a polygon is formed by a skeleton, and a high-density polyethylene sheet is attached to the space surrounded by the skeleton so as to wrap the skeleton.

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