JPS60129317A - Method of laying cover sheet over weir body - Google Patents

Abstract

PURPOSE:To simply lay a cover sheet which provides a complete impermeable effect, by a method wherein floats are attached along the side edge of the cover sheet, the sheet is pulled up to the top end of a weir body to remove the floats thereat, and the cover sheet is laid along the top end, the face of slope and the bottom of the sea. CONSTITUTION:Burges are caused to float on the surface 6 of water remaining in the reclaimed land of a weir body 1, a belt material 12 is pulled out, and the overlapped parts are molten by heat and are adhered by heat to each other to form a cover sheet 11. Thereafter, floats 16 are attached, the sheet is caused to float on the surface 6 through buoyancy, and the cover sheet 11 is brought into a condition in which it is spread in water. By pulling the side edge thereof, the sheet is pulled up along the portion, located above the surface, of a face 3 of slope and a top end 2 together with the floats, and is sunk along the portion, under the surface 6, of the face 3 of slope and the bottom 4 of the sea to lay it thereover. This eliminates the need for a troublesome work, in which the sheets are connected, in order, after laying, and permits production of a complete impermeable effect.

Description

[Detailed description of the invention] The present invention is applicable to ports such as landfill plazas and waste processing plants.

This relates to a construction method for laying a covering sheet on embankments constructed on coasts, rivers, lakes, and other areas.

□ For example, when a sea area or part of a body of water is separated by an embankment and used as a treatment plant where waste is thrown into a tank, particularly harmful components of the waste may dissolve or mix with the water and permeate through the embankment. It must be pressurized so that it does not leak into the surrounding area. Conventionally, attempts have been made to drive steel sheet piles into the embankment as a water-shielding method, but because there are gaps at their joints, a complete water-shielding effect cannot be expected. Taking advantage of the fact that □ is water-impermeable and has flexibility, for example, building 1: As shown in the figure, the slope 3. Synthetic resin sheets 5 of an appropriate width are laid out in sequence seven times, overlapping the side edges of each other little by little toward the water bottom 4', and the overlapping parts are connected to cover the entire length of the embankment body 1 with the synthetic resin sheet 5. things are being done. In this case, it is preferable to connect the molded parts by heat welding to prevent water and sewage containing harmful components from leaking out, but welding is not possible for the submerged parts on the landfill side. Therefore, a complete water-blocking effect cannot still be expected. Furthermore, 9 synthetic resin sheets 5
It has also been considered to use adhesive or connecting devices as a means of connection, but the former risks peeling off due to the weight of the waste and loss of water-tightness, and the latter is not watertight. It is unsuitable for embankments for waste treatment. Once again in history.

It is extremely troublesome to have to repeatedly pull down a synthetic resin sheet of a predetermined length along the slope from the narrow top toward the bottom of the water.

The present invention was invented with the aim of solving these problems and providing a construction method that can easily lay a covering sheet that provides a complete water-blocking effect.

In other words, the method of laying a covering sheet on an embankment body according to the present invention is to install a plurality of floats along one side edge in the longitudinal direction of a long covering sheet that is impermeable to water and has flexibility. The floats are removably attached, and these floats are floated on the water surface and placed parallel to the levee body, which is a covering sheet, with the floats facing toward the levee body. Pull the edge up to the top, remove the float, and place the sheet to the top.

The pipe machine is designed to run along slopes and the bottom of the water.

Next, an embodiment of the present invention will be described with reference to a case where a covering sheet is laid on an embankment constructed for waste treatment.

For example, the coating sheet 11 has a thickness of 1 to 101 m and a width of 2 to 10 m.
If necessary, a band 12 made of vinyl chloride resin sheet with a reinforcing layer made of knitting or plaiting and having a length of about 50 to Zoo m5 is connected sequentially in the width direction to a predetermined width. It has flexibility.

First, the barge 13 is floated on the water surface 6 of the water remaining on the reclaimed side of the embankment body l, and the required number of boxes 14 in which the strips 12 are folded and stored are placed in a zigzag shape and on the side edges of the strips 12 in the longitudinal direction. They are installed at the end of the barge 13 so that the sections overlap each other by about 10 to 10 zom. The band 12 is pulled out from the box 14 onto the barge 13, and the overlapping portions are sequentially welded by heat melting and pressure bonding to an appropriate width to form the covering sheath 11.

Attachment rings 15 are provided at appropriate intervals on one side edge of the covering sheet 11 in the longitudinal direction.

After attaching the floats 16 to the attachment rings 15 on the barge 13 at appropriate intervals, the coating sheath 11 is thrown into the water from the opposite end of the barge 13, and the side edge portion where the floats 16 are attached is removed. It floats on the water surface 6 by buoyancy, and the covering sheath 11 made of nine barges 13 is spread out in the water.

Perform the above-mentioned work at a location close to the embankment body I.

Covering sheet) 1 by fixing the tip edge of 1 or floating freely and moving the barge 13
1 is extended parallel to the embankment body 1 with the float 16 facing towards the embankment body 1. When the strip 12 runs out on the way, place a new strip 12 in the box 14 and connect the front and rear edges 9 to each other by welding to form one long strip-shaped covering sheet over a predetermined installation section. 11 is formed.

Next, when the work of throwing the covering sheet 11 into the water over a predetermined section is completed, as shown in FIG. The float 16 is brought close to the slope 3 of the embankment body 1 (Fig. 4).

Furthermore, the float 16 is pulled up together with the side edge above the water surface of the slope 3 and along the top edge 2 (Fig. 5), and the float 16 is removed after fixing this side edge to the edge 2. , covering sea) 11 is sinking due to its own weight, so it is laid down along the slope 3 below the water surface 6 and the water bottom 4 (6th
figure).

In addition, the covering sea) II is made with a width equal to the slope length of the slope 3 plus the appropriate length of the top and bottom 4, and when the embankment l is low and the slope 3 is steep, As described above, it is possible to use a single wide band made in advance without connecting the band 12 in the width direction. In addition, when the embankment l is constructed completely surrounding the reclaimed side, both the front and rear edges of the covering sheath 11 are once raised above the water surface 6 and welded together to make them watertight, and then subsidence along the slope 3. Withdrawal from Korea. Furthermore, the band 1
The work of making the covering sheet 11 by welding 2 is sometimes carried out on a workbench protruding from the embankment body 1 or on land, and when it is carried out on a barge 13, this barge 13 is The covering sheet 11 may be spread underwater by fixing the covering sheet 11 and pulling and moving the leading edge of the covering sheet 11 using an appropriate boat.

As described above, according to the present invention, a float is attached to one side edge and a long covering sheet is placed parallel to the embankment body with the float floating on the water surface, so the covering sheet can be moved as needed. Not only is it easy to move the float, but it can also be pulled up to the top by bringing the float close to the slope and easily catching the side edge of the float. The covering sheet, which has sunk almost vertically into the water due to its own weight, is laid down along the slope in close contact with the roof when it is lifted to the top. Therefore, by preparing a water-impermeable covering sheet in advance, the troublesome work of laying and connecting it one after another becomes a military expense, and the disadvantage of incomplete water-blocking properties can be eliminated. It is suitable as a pollution prevention measure for embankments of waste treatment plants where wastewater and sewage flows into surrounding water bodies.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view of the conventional method, and FIG. 2 is a plan view showing an embodiment of the present invention in which a covering sheet is made and floated on the water surface.
3, 4, 5, and 6 are cross-sectional views of the process of laying the covering sheet. l...Emise body, 2...Top, 3...
...Slope, 4...Bottom, 6...Water surface,
11...Covering sheet. 16...Float. Hatake 1 Figure 4 2n 4th gang.

Claims (1)

[Scope of Claims] A plurality of floats are removably attached along the side edges of a long, water-impermeable and flexible covering sheet in the longitudinal direction, and these floats are floated on the water surface. At the same time, place the covering sheet parallel to the embankment body with it facing towards the embankment body. An embankment body characterized in that a float is brought close to the slope of the embankment body, the side edge of the covered sheet is pulled up to the top, the float is removed, and the covering sheet is placed along the top, slope, and bottom of the water. A construction method that involves laying a covering/sheet on the surface.