JPS61176712A - Laying work of covering sheet on reclamation site - Google Patents

Abstract

PURPOSE:To quickly and easily perform laying operations of a covering sheet by a method in which plural ropes are laid at an adequate interval between dams facing each other, a covering sheet is sent from the top end to the inside of the dams, and the ropes are loosened to lay the sheet on the bottom. CONSTITUTION:Plural piles 3a and 3b are driven at an adequate interval in dams 2a and 2b facing each other, and ropes 4 with pulleys 6 are laid between the piles 3a and 3b. A covering sheet 7 is sent from the top end 2c onto the ropes 4, long sheets 8 are joined in order, and both ends 7a and 7b of the sheet 7 are folded upwards. At the same time, ropes 11 are connected to beams 9 provided to the tip end 7c of the sheet 7, and the sheet 7 is pulled by a dragger 12 through the ropes 11 and laid. The ropes 4 are then loosened, the sheet 7 is landed on the bottom 5, and both ends 7a and 7b of the sheet 7 are extended and fixed to the top ends 2a and 2b.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to the top, slope and bottom of an aircraft in a landfill located in a port, coast, river, lake or other area, especially an industrial waste disposal site. This relates to a method of laying a covering sheet over the entire surface of a building.

(Prior art and problems) Conventional 9 For example, when using a sea area or a part of a body of water as a treatment plant where waste is dumped into the area, particularly harmful components in the waste dissolve in the water. Or, in order to prevent the mixture from penetrating the embankment body and flowing out into the surrounding area, a covering sheet made of water-impermeable and flexible material such as synthetic resin is laid over the entire inside of the embankment body. That is what is being considered.

However, in general, the spacing between embankments forming a section of land such as a planned landfill site is 100 meters or more, and generally 200 to 300 meters apart.
00 meters, therefore the area of the covering sheet is 1
If the weight is large, especially if the bottom surface of the inside of the embankment body is in a wetland or swamp, or if rainwater or seawater accumulates and becomes muddy, or if there is little remaining water, the covering sheet may be applied to the bottom surface. It will be installed by sliding it along.

Since the bottom surface in these conditions has large frictional resistance and adhesive strength, it is practically impossible to lay the covering sheet along the bottom surface.

(Object of the invention) The present invention was made in view of the above circumstances, and can be implemented both when the bottom surface inside the embankment body is muddy and when water remains. It is also an object of the present invention to provide a construction method that can quickly and easily lay a covering sheet on an embankment body.

(Structure of the Invention) The method of laying a covering sheet on a reclaimed land according to the present invention is as follows:
Multiple ropes are installed between opposing embankment bodies at appropriate intervals and away from the bottom.

Paying out one end of the covering sheet from the top end into the embankment and sequentially moving it on the rope to lay the covering sheet,
The method is characterized in that each rope supporting the covering sheet is then loosened to allow the covering sheet to lie along the bottom surface.

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

Figures 1 to 4 show the case where the present invention is implemented on a planned reclamation site that has a rectangular mud-shaped bottom 5 surrounded by an embankment body 1. As shown, the top end 2 of the embankment body 1 faces in the longitudinal direction and faces each other!
, 24, a plurality of piles 311634 are driven at appropriate intervals.

Then, both ends of the rope 4 are tied to each of the opposing stakes 3α and 34. At this time, in order to maintain the state where each rope 4 is separated from the bottom surface 5 inside the embankment body 1, a sliding member made of a roller is attached to the portion of the rope 4 facing the bottom surface 5.
are provided at appropriate intervals. This work is carried out by a worker holding both ends of the rope 4 while walking on the opposite top ends 2α, 24 and sequentially attaching the rope 4 to the stakes 3α, 34. After the rope 4 has been erected, the covering sheet 7 is already stretched from the top end 2c, which is perpendicular to the top end 212b, to the top end 2α, as shown in FIG.
It is let out onto a rope 4 that is installed between 2b.

In general, the covering sheet 7 is water-impermeable and flexible, and the distance between the embankments 1 is as large as 100 meters or more, and it is difficult or impossible to manufacture and transport such a wide sheet. Next, long sheets 8 of an appropriate width made of vinyl chloride resin sheets having a reinforcing layer made of a braided material if necessary are arranged perpendicularly to the feeding direction, and the side edges are cut little by little in the length direction at the work site. 104. The bottom surface 5 and the slope lOα are sequentially joined watertightly by overlapping, adhesive or welding. The size is such that it covers the entire Roe and 10d.

In parallel with the work of sequentially joining the long sheets 8 in this way, the slope 10α, Rob and the top 2G, 2b of the embankment body 1 are
The opposite ends 7α and 7b, which are the parts to be laid, are folded upward, and the opposing top end 2d is connected via a rope U connected to a girder 9 attached in advance to the tip 7c of the covering sheet 7.
If it is towed by a towing machine such as a winch installed on the side, the covering sheet 7 will be pulled from the bottom surface 5. Law surface 101! , 10b and the top 2, and are pulled out by sequentially moving on the rope 4 stretched between the tops 2a and 2b without contacting the tops 2a and 2b. That is, the coating sheet 7 has a particularly high frictional resistance and adhesive strength on the bottom surface 5.
Because it does not touch the wire, it can be easily fed out and laid with a small amount of power. Also.

In this embodiment, since the rope 4 is provided with the sliding member 6, the frictional resistance is further reduced, and it is possible to let out the rope very easily.

When the installation of the covering sheet 7 is completed, the folded ends 7α and 7b of the covering sheet 7 are then spread out and fixed to the top ends 2a and 2b, respectively. In this embodiment, the rope 14 with one end fixed to the girder 9 is inserted through the ring member 13 attached to both end edges 8α of each of the short sheets 8 in advance. 2b@4
I wish I could raise each of these. Next, each of the ropes 4 supporting the covering sheet 7 is loosened to allow the covering sheet 7 to land on and lie along the bottom surface 5, thereby completing the laying.

Also, if necessary, remove the rope 4, stake 1.3b, etc. afterwards.

9 In this example, the bottom surface 5 of the embankment body is shown as being muddy, but it can also be applied in the same way when there is residual water inside the embankment body.
In this case, the rope 4 is installed above the water surface or underwater.

Further, although a roller is used as the sliding member 6, other members such as a hard synthetic resin molded product may be used for sliding, and the long sheets 8 may be arranged parallel to the feeding direction and joined to each other. .

(Effects of the invention) The method of laying a covering sheet on a reclaimed land according to the present invention is as follows:
A plurality of ropes are installed between the tops of the opposing bodies at appropriate intervals and separated from the bottom surface, and one end of the covering sheet is fed out from the top end into the embankment and sequentially moved over the ropes to cover the body. The structure is such that the sheet is laid down and the ropes supporting the covering sheet are loosened to allow the covering sheet to fall on the bottom surface, so even if the bottom surface is muddy or there is little residual moisture, The embankment Iζ covering sheet can be easily and quickly laid down along the bottom surface with a small amount of power. Also.

Each rope is stretched in a direction perpendicular to the direction in which the covering sheet is fed out, and each rope is drawn out more clearly if the sliding members are provided at appropriate intervals. .

Furthermore, if the covering sheet is rolled out onto rollers with the portions laid on the slope and top of the embankment located at both ends folded upwards, the covering sheet may You can install it more easily without touching the top.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and FIGS.
The figure is a perspective view showing the state of implementation. FIGS. 3 and 4 are enlarged sectional views taken along the person-entry line and the B-B line in FIG. 2, respectively. 1... Embankment body, 2α, 2d... Top,
4...Rope, 5...Bottom surface,
6. Old...Sliding member. 7...Coating sea), 7a, 7b...
・Side edge, loα. 10 b・・・・・・Slope.

Claims (3)

[Claims] (1) A plurality of ropes are installed between opposing embankments at appropriate intervals and separated from the bottom surface, and one end of the covering sheet is fed out from the top into the embankment and sequentially moved on the ropes. A construction method for laying a covering sheet on a reclaimed land, which is characterized by laying a covering sheet on a reclaimed land, and then loosening each rope supporting the covering sheet so that the covering sheet runs along the bottom surface. (2) The construction method according to claim 1, wherein each rope is stretched in a direction perpendicular to the direction in which the covering sheet is fed out, and each rope is provided with sliding members at appropriate intervals. (3) The construction method according to claim 1, wherein the covering sheet is fed onto the rope with the portions laid on the slope and top of the embankment located at both ends thereof folded upward.