JPH06101237A - Sheet and laying method therefor - Google Patents

Abstract

PURPOSE:To attain water shielding and errosion control effects even in a great depth with simplified method of execution, and to make such devices applicable to equipment for final disposition of wastes. CONSTITUTION:A sheet 6, equipped with a plurality of rope-attaching devices that are provided at specified intervals, is set afloat over the surface of the sea. And a rope 4 that is attached to the aforementioned rope attaching devices is drawn through rope-inserting devices 9 of weights 3 that are laid on the bottom of the sea. Thereby, the sheet 6 is sunk to the bottom of the sea.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet and a sheet laying method, and more specifically, a sheet laying method and a sheet laying method for a water-filling or sand-proofing method that can be applied to a final landfill site for landfill waste. A sheet that can be used in a construction method.

[0002]

2. Description of the Related Art Conventionally, most waste final disposal sites have been set up in landfills, and a water blocking method has been used to prevent pollution of public water bodies and groundwater. In recent years, due to the difficulty of landfilling the final landfill site, attention has been paid to the landfill landfill landfill site, which encloses a specific place in the sea with a revetment structure to make it a final landfill site. . By the way, since the sea surface reclamation is carried out on the public water surface, the water shielding work is carried out under different environmental conditions and construction conditions than the land reclamation, and moreover, it has the same or better performance as the land reclamation to prevent seawater pollution. Required to have. Therefore, conventionally, a rubber-based water impervious sheet or a vinyl chloride-based impervious sheet is sunk on the ground of the seabed. However, when the submarine ground is a so-called deep water, when the submerged sheet is submerged in the seabed, the submerged sheet does not sink straight down and is swallowed in the sea,
Since it is easy to move laterally, there is a drawback that it is difficult to sink the water blocking sheet at a predetermined position as desired.

[0003]

INDUSTRIAL APPLICABILITY The present invention has a simple construction method and is applicable to a sheet laying method and a sheet laying method thereof which can be applied to a water-filling water-filling method or a sand protection method that can be applied even in deep water. The purpose is to provide a sheet that can.

[0004]

[Means for Solving the Problems] As a result of intensive studies on the excellent water shielding method applicable to the above-mentioned landfill waste final disposal site, the inventors of the present invention have found that the seabed on the sea surface surrounded by revetment structures. When submerging the water-impervious sheet, float a water-impervious sheet that has a plurality of rope attachments at predetermined intervals with a float attached, and attach the ropes attached to each rope attachment to the weight placed on the seabed. It was found that the water impingement sheet could be sunk and positioned on the seabed by pulling it through the rope insertion tool provided, and it was further found that this knowledge can be applied to the laying method of the sandproof sheet. The present invention has been completed based on the above.

That is, the present invention comprises the following items. 1. A water barrier or sandproof sheet, characterized in that a plurality of rope attachments are provided at the ends at predetermined intervals. 2. Float a water barrier or sand protection sheet with a plurality of rope attachments at predetermined intervals, with a float attached,
A sheet laying method characterized in that the rope attached to each rope attachment is pulled through a rope insertion tool provided on a weight placed on the seabed to sunk the sheet and position the sheet.

The present invention will be described in detail below. In the sheet laying method of the present invention, it is necessary to float a water barrier or sand protection sheet provided with a plurality of rope attachments at predetermined intervals with a float attached. The sheet used in the present invention includes a mat having a cushioning property in addition to the narrowly defined sheet, and further includes a multilayered structure of the narrowly defined sheet and mat. The material of the sheet used in the present invention is not particularly limited, and examples of the water blocking sheet include rubber-based and vinyl chloride-based sheets, and the cushioning material includes, for example, non-woven fabric, foam of rubber or plastic. There are sheets, etc., but the material for the water blocking sheet is preferably one that is hard to let water pass through.

Although the thickness of the sheet of the present invention is not particularly limited, it is preferably 1 mm to 4 mm as a water blocking sheet, and particularly preferably 2.5 mm to 3.5.
mm, preferably 1 to 40 mm as a sandproof sheet
And particularly preferably 5 to 30 mm. The breaking elongation of the sheet is preferably 20% or more, and particularly 100
% Or more is preferable. Further, the water-permeable sheet preferably has a large water permeability coefficient, and is usually preferably 10 ⁻⁷ cm / sec or more. This seat is provided with a plurality of rope attachments at predetermined intervals. The predetermined interval may be a constant equal interval, or the intervals between the rope attachments may be different, and an interval of 3 to 20 m is usually preferable.

The rope attachment is not particularly limited as long as the rope can be attached and fixed, and various examples such as a string, a hole, an insertion tool and a fitting tool can be mentioned. However, those having eyelets are preferable. As an example, when the rope attachment is a rubber sheet having eyelets, it is preferable to bond the end portion of the rubber sheet to the water blocking or sand protection sheet with an adhesive or heat bonding. In addition, when the rope attachment is provided on the water blocking sheet, it is important that the water blocking sheet body does not impair the waterproof property. The position where the rope attachment is provided on the water barrier or sand protection sheet is not particularly limited and can be provided at various positions, but the end portion of this sheet is preferable, and particularly in the width direction of a long sheet. Both ends of are preferred.

In the present invention, a float is attached to the water barrier or sandproof sheet and floated on the sea surface. Here, “floating on the sea surface” includes not only those floating on the sea surface but also those held at a position several meters below the sea surface. The float is not particularly limited as long as it can hold the sheet near the sea surface, and various floats can be used. The mounting position of the float is not particularly limited as long as the sheet can be floated on the surface of the sea, but it is preferable that the float is attached at a constant interval to give a substantially uniform buoyancy to the entire sheet.

The method of floating the sheet on the sea surface can be carried out by various methods. As an example of the method of floating the rubber water impervious sheet on the sea surface, a rubber water impregnated sheet material having a predetermined length is stretched in the width direction. A method in which a wide rubber impervious sheet joined side by side is attached to a float and floated on the sea surface is preferable. Various methods can be used to join the raw sheets of the rubber water impregnating sheets in the width direction, and examples thereof include thermal adhesion or adhesion with an adhesive by stacking the end portions of the sheets. When the sheets are superposed and joined, the overlapping width is preferably 30 mm to 300 mm. This rubber water shielding sheet can be joined to each other on land,
Although it may be carried out on a work table ship on the sea, it is preferable to carry out on a work table ship on the sea in consideration of the transportation and development of the water blocking sheets which are gradually joined and become larger.

The place where the water barrier or sandproof sheet is floated is usually a place surrounded by a revetment structure. Here, the revetment construction means all revetment constructions of artificial constructions and natural constructions forming the revetment, and usually artificial constructions are used. Examples of artificial structures include concrete caisson revetments, steel cell revetments, hull caisson revetments, hybrid caisson revetments, steel sheet pile cell revetments, cellular block revetments, double steel sheet pile revetments, and the like.
The revetment structure may be one in which the mound is directly built on the support layer, or one in which the above-mentioned revetment structure is loaded on the one in which the mound was constructed after the ground was improved by the SCP method or the like.

In the present invention, it is necessary to pull the rope attached to each of the rope attachments described above through the rope insertion tool provided on the weight placed on the seabed. The attachment of the rope to the rope attachment of the sheet for waterproofing or sand protection is not particularly limited,
For example, it may be attached before floating on the surface of the sea, or may be attached after floating on the surface of the sea, and various methods may be used, but the method of attaching after floating on the surface of the sea is preferable. The weight used in the present invention is provided with a rope insertion tool. This rope insertion tool can be of any structure as long as it can pass the rope and can move the rope through the rope insertion tool when the rope is pulled, The structure may be integrated with the weight or attached to the weight.

The rope can be inserted into the insertion tool of the weight by various methods such as, for example, a method of inserting the rope into the insertion tool before the weight is sunk, a method in which the diver goes under the weight and then the rope is inserted into the insertion tool. However, it is preferable that the rope is inserted into the rope insertion tool and the weight with the floats attached to both ends of the rope is sunk. If floats are attached to both ends of the rope, the rope can be easily attached to the rope attachment of the waterproof or sandproof sheet, and the waterproof or sandproof sheet can be easily positioned. When pulling the rope to sink the water or sandproof sheet, it becomes easier to pull the rope from the sea.

It is desirable to place the weight in advance at a position where the water blocking or sand protection sheet can be submerged at a predetermined position. It is preferable to use a plurality of weights, and it is particularly preferable to sunk a plurality of weights along the both ends in the width direction of the long water-impervious or sandproof sheet. When a plurality of weights are used, the ropes attached to the plurality of rope attachments provided on the sheet for waterproofing or sand protection are passed through the rope insertion tools of the respective weights to pull the ropes. As described above, the rope attached to the rope attachment of the water barrier or sandproof sheet is pulled through the rope insertion tool of the weight placed on the base. It is preferable to pull the rope from the sea because the operation is easy.

As a method of submerging the water barrier or sandproof sheet, any portion of the sheet may be submerged, but a method of sequentially submerging from one end in the longitudinal direction of the long sheet is preferable. Therefore, it is preferable that the plurality of ropes attached to the plurality of rope attachments provided at both ends in the width direction of the long sheet be sequentially pulled from the ends through the rope insertion tool of the weight. When submerging the water barrier or sandproof sheet,
Although it is preferable to remove the float attached to the seat, the float may be submerged with the float attached. The weight may be left as it is on the seabed after the water blocking or sand protection sheet is positioned and sunk at a predetermined position, but it is preferable to pull it up.

The seabed ground on which the above-mentioned sheet is laid is
It is preferable to level the ground so that there are no sharp protrusions. Leveling can be done by various methods, such as filling the gaps in the mound rubble with a crushing material, surface coating with a reinforcing material such as asphalt to prevent sharp protrusions, and A method of inserting a cushioning material under the sheet is preferable. Various materials can be applied as the cushioning material, but a non-woven fabric having a thickness of about 5 to 30 mm is preferable.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be specifically described with reference to the drawings with reference to embodiments. The present invention is not limited to these examples. Example 1 FIG. 1 is a schematic cross-sectional view showing a rubber water blocking sheet floated on the sea surface surrounded by a seawall construction 1. The revetment structure 1 is built on the mound rubble 2. A plurality of weights 3 are sunk on the mound rubble 2 along the edge of the bottom of the revetment structure 1 at regular intervals, and also on the ground 10 at a predetermined distance from the revetment structure 1 along the revetment structure 1. A plurality of weights 3 are sunk at regular intervals. A ring-shaped rope insertion tool 9 and a lifting rope 5 are attached to the weights 3, and the rope 4 is inserted into the rope insertion tool 9. The floats 7 are attached to both ends of the rope 4 and are floated on the sea surface.

On the other hand, the rubber water barrier sheet 6 has floats 7 attached thereto at regular intervals and is floated along the revetment structure 1. The rubber water blocking sheet 6 is floated on the sea surface by the following method. In other words, width 1m, length 50
6 pieces of rubber water shielding sheet having a thickness of 2 mm and a thickness of 6 mm are overlapped with each other in the width direction by arranging the edges in the width direction by 50 mm, and the overlapped ends are heat-bonded to each other to form a wide rubber impeller having a width of about 6 m. Manufactures sheet stock. This raw fabric is wound on a roll, and the roll-shaped raw fabric is placed on a work berth 11 having a width of 25 m and a length of 70 m. This rubber sheet is spread on the work table 11 floated on the sea surface surrounded by the revetment structure 1, the widthwise end portions of the sheet material are further overlapped by 50 mm, and they are joined by heat bonding to form a rubber water shielding sheet. , A float is attached to the seat, the work pontoon 11 is moved, and the seat is dropped from one end of the seat to the sea surface while the other end is fixed on the work pontoon. Next, at the end of the sheet fixed on the work pontoon, the widthwise end of the next rubber impregnated sheet stock is
0mm overlap and bond by thermal bonding, attach a float and drop it on the sea surface as described above, and repeat the same work in sequence. In this way, the rubber water shielding sheet 6 was floated along the bank construction 1. At both ends of the rubber water shield sheet 6 in the width direction, rope attachments (not shown) are arranged at regular intervals (2) along the revetment structure 1.
0 m). The rope attachment is a square rubber sheet having a side length of 1 m and eyelets provided therein, and approximately half of the square is thermally bonded to both ends of the rubber water blocking sheet 6.

Next, one end of each rope 4 floating on the sea surface was attached to each rope attachment of the rubber impervious sheet 6 and positioned on the sea surface along the revetment structure 1.
In this way, since the end of the rope 4 is floated on the sea surface by the float 7, it is easy to attach the rope 4 to the rope attachment of the rubber water impervious sheet 6. After that, the pair of ropes 4 attached to both ends of the rubber water blocking sheet 6 in the width direction were sequentially pulled from the ends in the longitudinal direction, and the rubber water blocking sheet 6 was submerged in a base having a water depth of 20 m. The operation of pulling the pair of ropes 4 is performed by the revetment structure 1 and the work pontoon 1.
I went from each one. By submerging by this method, the rubber water blocking sheet 6 could be submerged at a predetermined position on the seabed. If a lock is provided at a specific place on the rope 4, the lock will be caught by the rope insertion tool 9 and the rope 4 cannot be pulled further. As a result, the rubber water blocking sheet 6 can be sunk in a place separated from the weight 3 by a specific distance.

After that, the weight 3 is pulled up by pulling the weight lifting rope 5 with one end attached with the float 8. The surface of the mound rubble 2 was covered with asphalt so that there were no sharp projections before the rubber water blocking sheet 6 was submerged. It fixed by the asphalt mastic to the part which contacts the edge part of the rubber impervious sheet 6 sunk in the ground 10 of the seabed, and the bottom part of the revetment construction 1.
Then, an abdominal soil layer made of high-quality soil was provided on the entire surface of the rubber water blocking sheet 6 so as to have a thickness of 1.5 m to prevent the rubber water blocking sheet from floating due to the difference in sea level. Construction of the soil layer with belly was performed by the following method. In this way, the final landfill site for waste was constructed by land reclamation. The seawater in the final landfill for waste is
It was discharged by a pump and the final disposal site for waste was completed.

Example 2 Example 2 was carried out in the same manner as in Example 1 except that a nonwoven fabric sandproof sheet was used in place of the rubber water blocking sheet. The sandproof sheet could be easily sunk in the preset position.

[0022]

According to the seat and the seat laying method of the present invention, the construction method is simple, and it is possible to achieve water repellent or sand protection for sea surface land reclamation, which can be applied even in deep water.
In particular, it is useful when the present invention is applied to a final waste disposal site.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a cross section showing a rubber water barrier sheet floated on the sea surface surrounded by a seawall construction.

[Explanation of symbols]

 1 Revetment structure 2 Mound rubble 3 Weight 4 Rope 5 Rope for lifting weight 6 Rubber water blocking sheet 7 Floater 8 Floater 9 Rope insertion tool 10 Ground 11 Work pontoon

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ikuo Hirose 63 Aoyanagi, Sayama City, Saitama Prefecture Shin-Sayama Heights 3-306 (72) Inventor Masayuki Tsuboi 3-5-26 Takakura, Iruma City, Saitama Prefecture 322 (72) Invention Person Mikiro Kondo 7-8-11 Shonandai, Fujisawa City, Kanagawa Prefecture (72) Inventor Takakatsu Waki 1255, Kozono, Ayase City, Kanagawa Prefecture

Claims (4)

[Claims] 1. A sheet for water impermeability or sand protection, wherein a plurality of rope attachments are provided at ends at predetermined intervals. 2. The sheet according to claim 1, wherein the rope attachment provided at the end of the water barrier or sandproof sheet has eyelets for attaching the rope. 3. A water barrier or sandproof sheet provided with a plurality of rope attachments at predetermined intervals is floated with a float attached, and the rope attached to each rope attachment is attached to a weight placed on the seabed. A sheet laying method, wherein the sheet is sunk on the seabed and positioned by pulling it through a rope insertion tool provided. 4. A method of attaching a rope to a rope attaching tool is such that a rope is inserted through a rope inserting tool attached to a weight, and the weight having floats attached to both ends of the rope is sunk to a predetermined seabed, and the float is attached. The sheet laying method according to claim 3, wherein one end of the attached rope is attached to a rope attaching tool for a sheet for waterproofing or sand protection.