JPS649419B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a waterstop sheet installation device.

When carrying out protection work for artificial reservoirs such as water reservoirs, rivers, or groundwater, it is necessary to block the flow of water from the reservoir or river, so conventionally, soil improvement piles, sheet piles, or steel pipe sheet piles are generally used. A water-stopping wall is built underground by driving in rows or two rows, and this prevents water from entering the area where the protection is being constructed.

However, as described above, the water-stopping method by driving ground improvement piles, sheet piles, or steel pipe sheet piles to build a water-stopping wall underground requires a large amount of hardening agent and sheet piles or steel pipe sheet piles. Of course, this increases the cost of materials,
In order to drive these ground improvement piles, sheet piles, or steel pipe sheet piles, it is necessary to introduce large working machines, and because these are driven one by one, there is a disadvantage that the construction cost increases. .

Therefore, in order to block the flow of water underground, an impermeable water stop sheet such as vinyl or rubber sheet is used, and this water stop sheet is applied to the area that reaches the impermeable layer, including the water permeable layer underground. We have developed a method to prevent water from flowing in through the water-permeable layer by burying the sheet over the ground, but by firmly laying the water-stop sheet at a predetermined location and fixing it underground, a complete water-stopping function can be achieved. It is not always easy to do so,
If there is a machine that is suitable for the installation, it can be used as an alternative to the conventional water-stopping method of driving sheet piles or steel pipe sheet piles, because the materials used are extremely low-cost, and there is no need for large working machines such as pile drivers. It can be an effective water stopping means with advantages.

In view of this, the present invention has been made for the purpose of providing a water-stop sheet installation device that can easily lay a water-impermeable band-shaped water-stop sheet in the ground where water is to be stopped.

In order to achieve the above object, the water stop sheet installation device of the present invention includes a movable trolley that can run freely along a groove pre-drilled in the ground of a site where water is to be stopped, and a belt-shaped water stop sheet in the width direction. The seat cassette has a seat cassette that can be freely fed out and stored in the vertical direction, and the upper end of the seat cassette is configured to be freely suspended on the movable trolley, and the seat cassette is suspended in the groove to allow the trolley to travel. At the same time, the sheet is fed out from one side of the sheet cassette and laid along the inner surface of the groove.

The present invention will be described below with reference to embodiments shown in the drawings.

The sheet laying device according to the present invention, as shown in FIG. 6 as an example of its use, uses an excavating machine 1 such as a backhoe or water jet to dig into the ground at a site where water is to be stopped, including a permeable layer 2. A trolley 6 that can run on rails 5 laid on the ground across a trench 4 excavated to a predetermined depth and at a required interval to reach the permeable layer 3; and a sheet cassette 7 suspended within the groove 4.

The trolley 6 has running wheels 9, 9, . . . on the front and rear sides of left and right frames 8, 8, and
The front and rear ends of the seat cassette 8 are integrally connected by beam members 10, 10, and the upper front and rear ends of the seat cassette 7 are suspended and supported between these beam members 10, 10.

The seat cassette 7 has a rectangular frame 11 having a width slightly narrower than the width of the groove 4, and side plates 12 having a vertical length corresponding to the depth of the groove 4 on the front and left and right sides thereof. A seat cover 13 which is suspended and fixed is placed between the beam members 10 and 10 of the truck 6 with its upper front and rear ends removably placed, and a seat holder 14 having a U-shaped cross section is provided within the space of the seat cover 13. is removably placed on the frame 11 of the seat cover 13 with the open side facing backward, and a band-shaped water stop sheet 15 made of a water-impermeable material such as rubber is attached to the seat holder 14 in the width direction. It is stored by folding it up and down like a folding screen.

The suspension means for the seat cover 13 is the frame body 11
flanges 16, 16 protruding from both ends in the front and rear direction;
The seat holder 14 is suspended by being fitted into the receiving parts 17, 17 provided at the center of the beam members 10, 10 of the truck 6, and the suspension means of the seat holder 14 includes flanges 18, 18 at the front and rear ends of the upper part of the holder. are provided protrudingly, and these flanges 18, 18 are attached to the frame 1 of the seat cover 13.
1 and suspended.

The seat holder 14 includes the seats shown in FIGS.
As shown in the figure, a folded band-shaped water stop sheet 15
An appropriate part of the upper end is suspended by a chuck member 19, and one end is fixed to the front upper end of the holder 14, and the upper end is wound around wire hook bars 20, 20 at the front lower end and rear lower end of the holder 14. A plurality of separate wires 21,...
are located at the folded portions of the front and rear portions of the sheet 15 to maintain the folded state of the band-shaped water stop sheet 15.

In addition to the above-mentioned embodiments, this sheet cassette 7 has a method in which, for example, a band-shaped water stop sheet wound into a roll is stored so as to be rotatable about the winding shaft with the axis of the winding shaft in the vertical direction. The band-shaped waterstop sheet may be fed out while being unwound from the end of the roll.

In the figure, reference numeral 22 is a messenger wire rope, which is stretched over the front groove and connected to the trolley 6.
The upper end of the band-shaped water stop sheet 15, which is fed out as the belt moves, is suspended from this wire rope using appropriate clip means.

Next, the operation of the above embodiment will be explained.

After excavating a groove 4 in the ground where a water stop wall is to be formed using an excavating machine 1 such as a backhoe or water jet, rails 5, 5 are laid along both sides of the opening in the ground surface, and the rails 5, 5 are Place the wheels 9, 9 of the trolley 6 on top.

Next, the seat cover 13 is suspended and supported between the beam members 10, 10 of the trolley 6 by an appropriate means, and the seat holder 14, in which the band-shaped water stop sheet 15 is folded in the form of a folding screen at the front and stored and suspended, is suspended by an appropriate means. It is suspended and supported within the space of the seat cover 13.

Next, one end of the water stop sheet 15 is pulled out from the opening of the sheet holder 14 and fixed along one inner surface of the groove 4, and the cart 6 is moved in the direction opposite to the direction in which the water stop sheet 15 is pulled out. While doing so, the band-shaped water stop sheet 15 is sequentially fed out and laid along the inner surface of the groove 4. When feeding out the water stop sheet 15, the tension of the separate wire 21 is released by cutting or the like, and the suspension by the chuck members 19 on the top of the water stop sheet 15 is released. Then, the upper end of the band-shaped waterstop sheet 15 is suspended from the messenger wire rope 22 at appropriate intervals using clip means or the like.

At the same time as this band-shaped water-stop sheet 15 is being fed out, excavated soil or carried-in earth and sand is backfilled between the inner surface of the groove 4 on the opposite side and the band-shaped water-stop sheet 15, and the water-stop sheet 15 is placed on the inner surface of the groove 4. Press and fix it and install it. By thus laying the band-shaped water-stop sheet 15 over the entire length of the groove 4, the water-permeable layer 2 in the ground is blocked by the band-shaped water-stop sheet 15, and a water-stop wall is formed in the ground.

As explained above, the water stop sheet installation device according to the present invention includes a movable trolley that can be installed freely along a trench previously excavated in the ground at a site where water is to be stopped, and a water stop sheet laying device that can be installed in the width direction of a belt-shaped water stop sheet. The seat cassette is configured such that the upper part of the seat cassette can be hung on the movable trolley, and the seat cassette is suspended in the groove to allow the trolley to travel. At the same time, the band-shaped water-stop sheet is fed out from one side of the sheet cassette and can be laid along the inner surface of the groove, so even a band-shaped and flexible water-stop sheet can be easily and reliably laid underground. This makes it possible to effectively construct water-stop walls in place of conventional sheet piles and steel pipe sheet piles.

In addition, the water-stop sheet is placed in a cassette, and the cassette is suspended and supported on a trolley, and the water-stop sheet is laid while moving inside the groove along its inner surface, so the water-stop sheet can be held and pulled out reliably. There is.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the water stop sheet installation device according to the present invention, Fig. 2 is a front view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is an example of a storage state of a band-shaped water stop sheet. FIG. 5 is a partially cutaway perspective view showing the suspended state of the cassette, and FIG. 6 is an explanatory view showing the installation state of the band-shaped water stop sheet. 6... Trolley, 7... Seat cassette, 13...
Seat cover, 14... Seat holder, 15...
...band-shaped water stop sheet, 21...separate wire.

[Claims]

1. The bottom of the connection hole is composed of a bottom plate, a table plate having a smaller diameter than the bottom plate and placed on the top thereof, and a cylindrical member located on the outer periphery of the table plate and placed on the bottom plate, A connector characterized in that a center hole is provided at the center of the upper surface of the bottom plate, a pin is provided on the lower surface of the base plate to be inserted into the center hole, and an inclined surface that is inclined from the outer periphery toward the center is provided on the upper surface of the base plate. Bottom structure of the hole.

Claims (1)

2. The water stop sheet laying device according to claim 1, wherein the sheet to be laid is wound into a roll and stored in the holder.