JPS59106611A - Laying work of water sealing sheet - Google Patents

Abstract

PURPOSE:To exactly perform water-sealing work in a water-stagnating low-level land by a method in which a float is provided at the tip of a water-sealing sheet set on one side of a pond, and the water-sealing sheet is drawn out through a drag wire by a winch provided on the other side. CONSTITUTION:A float 23 attached to the tip of a water-sealing sheet 20 is connected to the tip of a drag wire 7, and a winch 6 is operated to drag the tip of the sheet 20 to the side 5 of the opposite bank. When the tip of the sheet 20 reaches the side 5 of the opposite bank through the water surface, the winch 6 is stopped. The float 23 is removed from the sheet 20, the sheet 20 is temporarily fixed to the ground's surface, and the winch 6 and the wire 7 are removed. The stagnant water in a pond A is pumped up to the upside of the sheet 20, and the sheet 20 is laid on the bottom and sides of the pond A. The sides 20a and 20b of the sheet on the side banks 1 and 5 are buried in the trench and fixed to the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for laying a water-blocking sheet used for construction work in which a water-blocking sheet is laid over the bottom and surrounding surfaces of a low-lying area of water storage.

For example, in industrial waste treatment plants, etc., waste leachate (sewage) causes groundwater pollution, listed pollution, and pollution of public water bodies, so the structure of the pollution prevention dump site needs to be water-tight. It is necessary to lay a water-blocking sheet on the bottom and sides of the building.

However, if there is water in the treatment plant embankment, it is difficult to lay the sheet in a wide space under water, and for this reason, there is a need for a sheet laying method that can create a water-blocking structure for a wide area of low-lying land. There is.

The present invention has been made in view of the current situation, and an object of the present invention is to provide a water-shielding sheet that can reliably perform tree-lined construction even in low-lying areas with standing water over a wide area. The purpose is to provide a laying method.

As a method for achieving the purpose, the laying method of the present invention is as follows:
A water-blocking sheet is placed on one side of the ground side of the low-lying land where water is stored.
In addition, on the other side of the ground II+lI opposite to this, a device such as a winch is installed, and a traction wire pulled out from this winch is guided to one side.
Further, a float is fixed to the tip of the water-shielding sheet L, and the tip of the wire is tied to the tip of the water-shielding sheet T, and then, based on the winding operation of the winch, the water surface is fixed to the top of the float. After drawing the tip of the sheet floating by buoyancy to the other side, a pump installed near the low-lying area is used to transfer the accumulated water in the low-lying area to the top of the same sheet, thereby causing the It is characterized in that the sheet is laid over the bottom and surrounding surfaces of the low-lying land.

Hereinafter, the present invention will be specifically explained based on an illustrated embodiment.

In the construction of the example construction method, as shown in Figures 1 to 6, one side of the rectangular pond (low terraced water storage area) A in the vertical direction (left and right direction in Figure 1), that is, the right side of the drawing. On the ground side 1 of
A longitudinal plywood 2 such as plywood or steel plate that runs completely in the lateral direction (downward in FIG. I'll put it on.

In addition, a plurality of winches 6 (four in the figure) are installed in parallel on the other ground side 5 in the vertical direction, and the tip of the traction wire 7 pulled out from each winch 6 is connected to the other side 5 on the ground side in the vertical direction. Place it on side 1.

In addition, the periphery of this pond A is provided with revetments of 10° and 11.12 degrees on the side 5 and both sides 8.9 on the left and right sides in the lateral direction, respectively.

Next, on each of the left and right sides 8 and 9, a vertical groove 13 is dug along the vicinity of each seawall 11 and 120, and a guide rail 14 is installed on the center line of the bottom of the groove 13 by driving legs 14a. A plurality of guide rings 15 are inserted into the rail 14.

Therefore, a protective sheet 16 for protecting a water-blocking seam (described later) is passed through and covered on both sides of the upper surface between each seawall 11, 12 and each vertical groove 13. A pair of half-split pipes 17 are fixed to both sides of the upper surface to reduce friction with the water-blocking sheet.

In addition, an original fabric 18 of resin waterproof sheet material is prepared near the base plate 2, and a water pump (not shown) is prepared at a suitable location near the pond, and a float used in the above process is prepared. Prepare etc.

Next, the installation of the water-blocking sheet will be carried out according to the following steps.

(1) Coupled processed original fabric 18 or wide processed product of 20 (Waterproof Sheet) 20 is made into sheet pieces 21, these sheet pieces 21 are sequentially placed on the base plate 2, and connected and bonded in both length and width directions by self-propelled welding@4. do.

Thus, the connected water-shielding sheath 20 is sent out to near the water's edge in the pond while folding its left and right ends in a zigzag shape to reduce its width.

(2) Treatment of the tip of the water-blocking sheet 2o First, the tip of the water-blocking sheet 20 is processed into a bag, and then the pipes 22 that serve as scaffolds and cores are inserted into the bag, and a plurality of pipes (
In the illustration, it is attached to the top of seven floats 23.

Next, the float 23 facing the winch 6 is tied to the tip of the pulling wire 7 at a proper place on the tip of the water-blocking sheet 20, for example, the float 23 facing the winch 6.

(3) Stretching process of the water-blocking sheet 20 The winch 6 is operated in accordance with the adhesion speed of the water-blocking sheet 20 that is continuously carried out on the base plate 2J, thereby spreading the water-blocking sheet 20 floating on the water surface. Place the tip on the opposite bank side 5
Tow it to the water surface and spread it out on the water surface.

During this time, short retaining cables 24 were attached to the left and right ends of the water-blocking sheet 20 at appropriate intervals, and the hooks of the cables 24 were hung on the guide ring 15, and the water-blocking sheet 20
prevent water from falling into the pond.

Therefore, when the tip of the water-shielding sheet 20 reaches the side 5 (on the opposite shore), the winch 6 is stopped, and the extra length of the laying depth is connected and bonded, so that the water-shielding sheet 20 can be jointly processed. finish.

(4) Removal of some equipment From the tip of the water-blocking sheet 20 to the float 23 and the
After removing the seat 20, both ends of the seat 20 in the longitudinal direction are temporarily fixed on the ground, and the four half-split vibrators 17 along the left and right poles 11 and 12 are removed.

Further, the winch 6 and the pulling wire 7 are removed, as well as the base plate 2 and the welding machine 4, and then trenches are excavated on each of the upper sides 1 and 5 in the lateral direction.

(5) Installation process of water-blocking sheet 20 A water pump is used to displace accumulated water in the pond onto the top surface of the sheet 20, and the sheet 20 is thereby infiltrated and laid over the bottom and circumferential surfaces of the pond A.

(6) Fixing the circumferential portion of the water-blocking sheet 20 (see Figures 7 to 9) As the final step of the installation work, a local part of the water-blocking sheet 20 is fixed to the ground. 1 on each side
, 5 are buried in trenches and hardened with backfill soil, and the sheet peripheral portions 20c and 20d on each of the horizontal sides 8 and 9 are left as they are with vertical grooves. 13 and compact it with backfill soil 25.

In the construction method of this embodiment, it is possible to carry out the construction by only working on the ground, and it is also possible to carry out the construction by using a self-propelled welding machine 4.
Since the water-blocking sheet 20 is coupled with the water-blocking sheet 20, the connection process can be performed efficiently, the water-tightness of the water-blocking sheet 20 is highly reliable, and the water-blocking sheet 20 can be expanded on the water surface. This combined with the fact that the left and right ends of the water-shielding sheet 20 are guided and protected by the half-split pipe 17 and the protective sheet 16, the expansion resistance load applied to the water-shielding sheet 20 is small. There is almost no possibility that the water sheet 20 will be damaged.

In addition, in the method of the above-mentioned embodiment, the water-blocking sheet 2
Several guide rails 14 for guiding the left and right side ends of 0 were placed in the vertical groove 13, but instead of this, like the guide rail 19 shown in FIG. A guide rail 19 is erected on the ground by a pillar 19a.
In this case, the method for fixing the sheet peripheral portion 20C after the installation is completed (as shown in FIG. Fix it.

In addition, in this construction method, a water-blocking sheet large enough to cover the entire mouth of Pond A may be formed off-site and transported to the site for use, or several sheet pieces may be formed. It can be used as a water-blocking sheet by coupling as appropriate.

As described above, according to the method of laying a water-blocking sheet according to the present invention, a float is provided at the tip of the water-blocking sheet placed on one side of the pond, and the float is towed by a winch on the other side. By pulling out the water-shielding sheet through a wire, the sheet is stretched over the water surface, and then the sheet is laid around the bottom of the pond by displacing the standing water. This also makes it possible to reliably carry out water-blocking work, which has the effect of making it possible to freely select a dump site for a large amount of industrial waste.

[Brief explanation of drawings]

Fig. 1 is a plan view of a pond where the sheet is spread during the sheet spreading process of a water-blocking sheet installation method showing an embodiment of the present invention, and Fig. 2 is a plan view of a pond where The cross-sectional view, Figure 3, is
The front sectional views taken along the line ■-■, Figures 4 and 5 are 1! of Figure 2. Enlarged view of A5 minute IV and part ■, No. 6
The figure is an enlarged view of part IV in Fig. 3, and Figs. 7 to 9 G are the state in which the construction shown in Figs. 1 to 3 is completed [ffl, Fig. 10 (a)] is a diagram of the guide rail tilted on its side, which corresponds to Figure 6, Figure 10 (b) (well,
FIG. 9 (This is a corresponding diagram. 1... One side, 5... Other side, 6... Winch, 7... Traction wire, 20... Water-shielding sheet ,
23...Float.

Claims (1)

[Claims] A water-blocking sheet is placed on one side of the ground side of the low-lying land where water is stored.
Moreover, a traction device is installed on the other ground side facing this, and a traction wire pulled out from this traction device is guided to the one side, and furthermore, Li! l:! A float is fixed to the tip of the water-shielding sheet, and the tip of the wire is tied to the tip of the water-shielding sheet, and then, based on the winding operation of the traction device, the water surface is moved by the buoyancy of the float L. After pulling the tip of the floating sheet to the other side, a pump installed near the low-lying area is used to transfer the accumulated water in the low-lying area to the top surface of the sheet, and as a result,
A method for laying a water-blocking sheet, characterized in that the sheet is laid over the bottom and circumferential surface of a low-lying land.