JPS6157705A - Method of laying covering sheet on reclaiming land - Google Patents

Abstract

PURPOSE:To rapidly lay a covering sheet, by a method wherein, after a covering sheet is laid on a water surface above a reclaiming land by providing buoyancy as long sheets, having water impermeability and flexibility, are joined together to form a wide covering sheet, the sheet is sunk onto the seat bottom through removal of buoyancy. CONSTITUTION:Long sheet 6 formed with polyvinyl chloride resin sheet is unwound from each containing body 7, and a lock member 12 is attached in the longitudinal direction of the each long sheet 6 as an overlap part 6a is welded by a welder 8 to form a wide covering sheet 11. A rope 9, wound around each containing body 10, is interposed through the lock member 12 for locking, and a float 13 is engaged with the rope 9. A rod material 14 is attached to the forward end of the covering sheet 11, and a pull rope 14a, attached to the rod material 14, is wound by means of a hoisting drum installed on an opposite revetment 1 to lay the sheet 11 on a water surface 16. The rope 9 and the float 13 are removed from the sheet 11, and the sheet 11 is sunk to lay it on a sea bottom 5.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a coating sheet for the entire surface of the inner surface of the seawall and the bottom of the seawall in landfills located in ports, coasts, rivers, lakes and marshes, mainly industrial waste disposal sites. This relates to the construction method for laying.

(Prior art and problems) Conventionally, as shown in Figure 4, a part of the sea area or water area is surrounded by a seawall 3, and the inside of the sea area is divided into an appropriate area by a partitioned seawall 1, and industrial waste, etc. is dumped. It is being used as a waste disposal site. In addition, it is necessary to prevent components in the waste, especially harmful components, from being dissolved in the water, mixing with the dissolved water, passing through the seawalls 1 and 3, and flowing out into the surrounding sea area 2. For this reason, attempts have been made to lay a waterproof sheet on the inner slope of the outer seawall 3, and to construct both sides of the partitioned seawall 1 with rows of steel sheet piles 4, as shown in Figure 5. .

Since there are gaps at the joints of the steel sheet piles 4, it is impossible to prevent harmful substances from flowing out through these gaps and furthermore, from passing through the water bottom 5 and leaking out. I couldn't expect it. Therefore, it is possible to cover the entire inner surface of the seawall and the bottom of the water with a water-impermeable sheet such as a synthetic resin sheet, but in general, the distance between the seawalls that form a section of land such as a planned landfill site is large, 100 meters or more.
There is no wide covering sheet that can cover such a wide area, and even when multiple sheets are glued together and laid, it is difficult to manufacture the wide sheet at a factory, transport it, and even lay it. Furthermore, even when gluing on-site, it is extremely difficult to manufacture and lay wide sheets, and there is currently no means to do so.

(Objective of the Invention) The purpose of the present invention is to solve these problems and provide a construction method that makes it possible to simply and quickly lay a covering sheet over the entire surface of the inner surface of the revetment and the bottom of the water at a reclaimed land. It was invented as.

(Structure of the Invention) The method of laying a covering sheet on a reclaimed land according to the present invention is as follows:
The longitudinal side edges of the impermeable and flexible long sheets are joined in a reciprocating manner to create a wide covering sheet, which is then given buoyancy and rolled out onto the water surface of a reclaimed land surrounded by a seawall. The coating sheet is characterized by being laid in a floating state over almost the entire surface of the water, and then the buoyancy is removed to cause the covering sheet to sink toward the inner surface of the seawall and the entire surface of the water bottom.

(Example) Next, the present invention will be explained in detail based on examples.

In Figs. 1 to 3, a reinforcing layer made of a braided material is shown in Figs. 1 to 3, which is water-impermeable and flexible. As shown in FIG. 1, a long sheet storage body 7 in which long sheets 6 made of vinyl chloride resin sheets are folded and stored is fed out in the landfill direction (to the right in FIG. 1). It is arranged at the top end 3α of the outer seawall 3 so that the side edges facing in the longitudinal direction overlap each other, and on the reclaimed side of this long sheet storage body 7, adjacent long sheet storages are arranged. A welder 8 is installed at the overlapped portion 6a of the long sheets 6 from the body 7. moreover,
At the rear of the long sheet storage body 7, a rope storage body 10 around which a beam portion 9 is wound is arranged.

9 In order to carry out the present invention, first, a long sheet 6
is fed out from the long sheet storage body 7 and placed in the overlapping section 6.
α is welded with a welder 8 without any gaps to form a wide covering sheet 11. At this time, the wide covering sheet 11 requires a length and width equal to one width of the length of the landfill plus the inner height of the seawall 1.3.

Next, while making the covering sheet u as described above, locking members 12 having Ω-shaped end surfaces are attached at appropriate intervals near the longitudinal center of each long sheet 6 as shown in FIG. The rope 9 wound around the rope storage body 10 is inserted through the locking member 12 and locked. At this time, a float 13 having an annular locking portion 13 eL that can be opened and closed at the lower end is locked to the rope 9 between the locking members 12 . In this embodiment, each long sheet 6 is provided with a locking member 12.

It may be provided on an appropriate long sheet 6 in consideration of the buoyancy of the float 13 and the depth of embedding the covering sheet 11 in the water;
Although the floats 13 are arranged between all the locking members 12, the mounting positions can be similarly selected as appropriate in this case as well.

Next, a bar 14α extending in a direction perpendicular to the feeding direction is attached to the tip of the covering sheet 11, and a traction rope 14 connected to this bar 14α is attached to a winding drum device (
The covering sheet 11 is fed out onto the water surface 16 by winding it up on the water surface 16 (not shown).

Lay them sequentially. Here, the tip of the covering sheet 11 may be pulled by a ship. Also, at this time, the side end 1 of the covering sheet 11 covering the inner surface of the seawall 1.3 located parallel to the towing direction
1α, as shown in FIGS. 1 and 10, is folded inward and a cord 15 is attached, and in this state the covering sheet 11 is pulled to the opposite bank 1 (see FIG. 7).

The covering sheet 11 is fed out in a floating state slightly buried in the water surface 16 of the landfill by the action of the float 13, and is spread over almost the entire surface of the water surface 16. Then, when the tip is pulled up onto the seawall 1, the feeding is stopped with the rope 9 loosened in the front and back, and the rope 9 is pulled out from the locking member 12, the rope 9 and the float 13 are separated from the covering sheet 11, and the As shown in FIG. 8, the covering sheet 11 sinks toward the entire surface of the water bottom.

If a weight 17 is attached to the covering sheet 11 in advance, sedimentation can be easily performed. The float 13 floating on the water surface is collected by a boat or the like and reused. Then, as shown in FIG. 11, the string 15 attached to the side end 11α of the folded covering sheet 11 is pulled from above the seawall 3, and then pulled along the inner surface of the seawall 3 as shown in FIG. The covering sheet 11 is laid so as to cover the entire inner surface of the seawall 1q. Thereafter, as shown in FIGS. 9 and 13, industrial waste 18 is thrown in and landfilled.

14 and 15 show other embodiments in which the construction method of the present invention is carried out.9 In this embodiment, a long coating is made in the same manner as in the previous embodiment. sheet 6
A wide covering sheet 11 is made by overlapping the longitudinal side edges of a plurality of sheets and gluing the overlapping portions 6a, and then.

A long bag-like member filled with air is stacked on the front or back surface of the covering sheet 11 in a direction perpendicular to the feeding direction, and this is attached to the covering sheet 11 by a locking member 19 having an Ω-shaped end surface. This gives buoyancy to the covering sheet H by holding it down. After laying the bag-like member 20 in a floating state by the same means as described above, the bag-like member 20 is removed, or the ends are cut open while still attached to remove air and remove buoyancy, and the covering sheet 11 is placed on the inner surface of the seawall and It causes the water to settle towards the entire surface of the water bottom. In this embodiment, sedimentation can be easily carried out by filling industrial waste, earth and sand, etc. in addition to the deflated bag-like member.

(Effects of the Invention) The present invention creates a wide covering sheet by joining the longitudinal side edges of a long sheet that is water-impermeable and flexible, and provides buoyancy to the water surface of a reclaimed pond. The sheet is unrolled and laid in a floating state on almost the entire surface of the water surrounded by the seawall, and then the buoyancy is removed and the sheet settles toward the inner surface of the seawall and the entire surface of the water bottom, so it is easy to remove from landfill materials and industrial waste. It completely prevents harmful substances from penetrating the seawall and the water bottom and flowing out into the surrounding sea area, water bodies, or land.In addition, the installation work is easy and quick, and it is economical because it only requires work on site. It has various effects such as:

[Brief explanation of drawings]

Fig. 1 is a partial plan view of an embodiment for carrying out the construction method of the present invention, Fig. 2 is a sectional view taken along the line A-A, and Fig. 3 is the engagement of the float, quadruple, and covering sheet. Fig. 4 is a plan view of the reclaimed land, Fig. 5 is a sectional view taken along the line B-B, Figs. FIG. 15 is a partial plan view of a specific example, and FIG. 15 is a sectional view taken along the line a-C. 1... Seawall, 2... Sea area, 3...
... Seawall. 3α...Tip, 4...Steel sheet pile, 5
...At the bottom of the water. 6... Long sheet, 6α... Overlapping part. 7... Long sheet storage body, 8...
Welder, 9... Rope, 10...
Rope storage body, 11...Covering sheet, 11α・
... Side end portion, 12 ... Locking member, 13.
...Float, 13α... Attachment part, 14...
...Tow rope, 14α... Bar material, 1
5... String. 16... Water surface, 17... Weight, 18.
·····Industrial waste. 19... Locking member, 20... Bag-shaped member. f\

Claims (3)

[Claims] (1) The longitudinal side edges of a long, water-impermeable and flexible sheet are joined to each other to create a wide covering sheet, which is then given buoyancy and rolled out onto the water surface of a reclaimed land surrounded by a seawall. A construction method for laying a covering sheet on reclaimed land, which is characterized by laying the covering sheet in a floating state on almost the entire surface of the water, and then removing buoyancy and allowing the covering sheet to sink toward the inner surface of the seawall and the entire surface of the water bottom. (2) A plurality of locking members are provided in multiple rows at appropriate intervals on the surface of the covering sheet, and ropes with removably attached floats are inserted and locked in each row through these locking members at appropriate intervals. A method of applying buoyancy to the covering sheet, laying it in a floating state on almost the entire surface of the water surrounded by a seawall, and then pulling out the rope from the locking member to remove the buoyancy by detaching the rope and the float from the covering sheet. A method of laying a covering sheet on the reclaimed land described in Scope 1. (3) Bag-like members filled with air are attached to appropriate locations on the surface of the covering sheet to give buoyancy to the covering sheet, and after being laid in a floating state over almost the entire surface of the water surrounded by the seawall, the bag-like members are A construction method for laying a covering sheet in a landfill according to claim 1, wherein air is removed from the inside of the member to remove buoyancy.