JPS60129315A - Method of laying cover sheet over weir body - Google Patents

Abstract

PURPOSE:To produce a complete impermeable effect, by a method wherein floats are attached to the side edge of a cover sheet, other floats are attached to its corresponding side edge also, a surplus width part is lifted up, and after the floats are removed, the sheet is sunk along a face of slope under the surface and the bottom of the sea. CONSTITUTION:The side edge of the surplus width part 21 side of a cover sheet 11 is drawn near to a weir body 1, and floats 17 are moved alongside a face 3 of slope of the weir body 1. The surplus width part 21 is lifted up along the portion, located above the surface, of the face 3 of slope and a top end 2, and the suplus width part 21 is secured to the top end 2. When the floats 16 and 17 are removed, the portion, situated between two rows of the floats 16 and 17, of the cover sheet 11 is sunk under gravity, and is sunk and laid along the face 3 of slope under the surface 6 and over the bottom 4 of the sea. This eliminates the need for a troublesome work in which the sheets are connected, in order, after laying, and enables to produce a complete impermeable effect.

Description

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

This invention relates to a method of laying a covering sheet to cover aircraft bodies built on coasts, river banks, lakes and marshes.

For example, when a sea area or part of a body of water is partitioned off by an embankment and used as a treatment plant where waste is thrown into the area, particularly harmful components of the waste dissolve or mix with the water and permeate through the embankment. (must be done so that it does not leak to the public).

Conventionally, attempts have been made to drive steel sheet piles as a water-shielding means for the embankment body, but a complete water-shielding effect could not be expected because of the gaps at their joints. Therefore, by taking advantage of the fact that the synthetic resin sheet 1 is water-impermeable and flexible, for example, as shown in Fig.
．． Synthetic resin sheets 5 of an appropriate width are sequentially laid down toward the water bottom 4 with their side edges slightly overlapping each other, and the overlapping parts are connected to cover the entire length of the embankment l with the synthetic resin sheet 5. things are being done. In this case, in order to prevent water and wastewater containing harmful components from leaking out, it is preferable to connect the molded parts by heat welding.
Since the parts cannot be welded, the complete water-shielding effect is still [
I can't wait for 7. Furthermore, it is also considered to use an N contact agent or a connecting device as a means for connecting the synthetic resin sheets.

The former has the risk of peeling off due to the weight of the dumped material and loses water-tightness, and the latter is not suitable for use as an embankment for waste treatment because it does not have watertightness.

Yet again. 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.

One object of the present invention is to solve these problems and provide 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 involves removing a plurality of 111aK floats in the longitudinal direction of a long, water-impermeable and flexible covering sheet.
At the same time, a plurality of floats are removably attached to the water tank, leaving a margin on the other side edge in the longitudinal direction, and these floats float the covering sheet on the water surface, parallel to the embankment body. Place it in.

The float on the extra width side is docked on the slope of the embankment body, the extra width is placed on the slope, face, and top of the water above the water surface, and the float is removed in the first stage of hoisting and carried along the slope below the water surface and the water bottom. The feature is that the combed sheet is made to sink.

Next, a description will be given of the use of an embodiment of the present invention in the case of laying an embankment body V = covering sheath constructed for a waste disposal site.

For example, the Q sheet 11 has a thickness of 1N10 and a width of 2 to 10 m.
+ A band 12 made of a vinyl chloride resin sheet with a reinforcing layer made of a braided material depending on the need for a length of 50 to 100 m.
Where are they connected sequentially in the width direction? A material with a wide width is used, and has water impermeability and water resistance.

First, the barge 13 is floated on the water surface 6 of the water remaining on the reclaimed side of the embankment body 1, and the required number of boxes 14 in which the strips 12 are folded and stored are quickly and fIllll
The edges are mutually JCIO~2010p1. It is installed at the end of the barge 13 so that it has a similar shape. From said box 14 to strip 12
is pulled out onto the barge 13, and the overlapping portions are successively heat-fused and crimped to an appropriate width, thereby continuously forming a weld (t) and a covering seam (11).

Attachment rings 15 are provided at appropriate intervals at locations near the center by an appropriate width from one side IR and another fA edge facing toward the hand direction of this hakama sheet. Attach the floats 16 and 17 to the mounting ring 15 at appropriate intervals, and then attach the '91Wk from the opposite end of the barge 13.
The sheet 11 is thrown into the water surface 6 and floated by the buoyancy of the floats 16 and 17. The edge of the wave sheath) 11 is connected to the girder 18, and by towing this girder 18 to the ship 2O with a loaf 19, the wave sheath) 11 made by the barge 13 is successively extended to the water surface 6. It is made to float in this state. Edge cover sheet 11
Extra width part 21 between one side edge of the float 17 inside it
is bent and the float 17 attached is attached tightly to the attached FR15.

Perform the above work at a location close to the embankment body l.

The barge 13 is moored and fixed at the - location, and the covering sheath 11 is extended parallel to the embankment body l. On the way, the band 12
When this occurs, a new strip 12 is placed in the box 14, and the front and rear edges of the strip 12 are connected to each other by welding to form a long strip-shaped covering sheet 11 over a predetermined installation section.

Next, when the work of raising the corrugator sheath) 11 to the water surface 6 is completed, as shown in FIG.
Pull the side edge of the levee body l to bring the float 17 almost to the slope 3 of the levee body l (Fig. 4), and move the extra width part 21 to the slope 3.
was pulled up above the water surface and along the top edge 2 (Figure 5).

When this extra width part 21 is fixed to the top 2, the float is 16°17
These two rows of floats 16 and 17 of 11
The part between them sinks under its own weight.

It is laid down along the slope 3 and the water bottom 4 below the water surface 6 (Fig. 6).

In addition, the covering sea) 11 is attached to the slope length of the slope 3 at the top 2. It is made to have a width equal to the appropriate length of the water bottom 4, and when the embankment body 1 is low and the slope 3 is steep, it is made in advance without connecting the strips 12 in the width direction as described above. You can use one wide piece. In addition, when the embankment l is constructed to completely surround the reclaimed side, the both front and rear edges of the covering sheath 110 are welded together to make it watertight, and then the embankment is laid down along the slope 3.

Furthermore, the work of welding the strips 12 to form the sheath 11 may be carried out on a workbench protruding from the embankment or on land, and what about when it is carried out on the barge 13? J! ! override) 1
The coated sheath 11 may be floated on the water surface 6 by fixing the leading edge of the barge 13 in one place and moving the barge 13.

As described above, according to the present invention, a float is also attached to the edge of the water surface of the slope, and the long covering sheet is placed parallel to the embankment body while almost completely floating on the water surface. Not only was it easy to float the sheet on the water surface and move it as necessary, but the float on the side of the extra width was attached to the slope and the extra width was pulled up along the slope and top edge above the water surface. Afterwards, the float is removed and the covering sheet is allowed to sink along the slope below the water surface and the water bottom, so the covered sheet sinks according to the laying condition on the ceiling i side and remains in close contact along the slope. It is laid down. Therefore, by preparing a water-impermeable test sheet in advance.

This eliminates the need for the troublesome work of sequentially connecting connections after installation, and also eliminates the disadvantage of incomplete water-blocking properties (this eliminates the need for bamboo to be used in waste treatment plants where water containing harmful substances or sewage flows into surrounding water bodies). It is suitable as a pollution prevention measure for embankments.

[Brief explanation of the drawing]

Figure 1 is a perspective explanatory view of a conventional knee, and Figure 2 is a plan view showing all embodiments of the floating sheet □ of the present invention made and floated on the water surface. Figure 3, Figure 4, Figure 5, Figure 6 is a cross-sectional view of the process of laying the covering sheet, 1... - Bank body, 2... Top, 3...
・・Slope surface, 4・・・・−・Water bottom, 6・・・・−・Water surface,
11...Covering sheet. 16.17...Float, 21...Extra width part. Fighting 1 Fighting 2 ;=. 399 Figure 4 □

Claims (1)

[Claims] A plurality of floats are removably attached to one side edge of a long, water-impermeable and flexible covering sheet in the longitudinal direction, and an extra float is attached to the other side edge in the longitudinal direction. Remove multiple floats leaving the width part 1] Attach to Noh,
The coating sheet is floated on the water surface by these floats and placed parallel to the embankment body, and the float is attached to the slope of the embankment body on the side of the extra width part, and the extra width part is placed on the slope face above the water surface. A construction method for laying a loosened sheet on an embankment body, which is characterized by removing the float in nine hems along the top of the embankment and sinking the covering sheet along the slope below the water surface and the water bottom.