JP2681033B2 - Slit water stop wall method in the ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground slit water blocking wall construction method for stopping permeated water from the ground.

[0002]

2. Description of the Related Art Conventionally, a method of constructing a water stop wall in the ground for stopping permeated water from the ground is as follows: (1) The grout material injection hole is bored at a predetermined distance from the surface of the ground The grout material is injected into the ground through the injection hole, and the cracks and the permeation path in the ground are filled with the grout material. If this does not provide sufficient water-stopping effect, a new grout material injection hole is drilled to interpolate the grout material injection hole, and the grout material injection hole is used to insert the grout material into the ground. Was injected to fill the cracks and infiltration paths in the ground with the grout material, and this was repeated until a sufficient water blocking effect was obtained. In addition to this, (2) For a ground with a low degree of consolidation, there are a method of driving a sheet pile made of steel or a method of excavating the ground and constructing a water blocking wall in the ground.

[0003]

However, according to the construction method as described in (1) above, in soft rock or unconsolidated sedimentary layer with a low degree of consolidation, groundwater passes through microscopic voids in the rock or the sedimentary layer itself. There is a problem that it is difficult to improve the water impermeability by waterproofing grouting because it flows. In addition, with the water-stopping method as in (2), it is not possible to drive sheet piles into the rock with a high degree of consolidation and excavate inside the ground. There is a problem in that it cannot be formed.

Therefore, an object of the present invention is to solve the problems of the conventional in-ground water stopping wall construction method for stopping the permeated water in the ground as described above, and to form the slits in the ground to form the grout material. Another object of the present invention is to provide a method of constructing a water stop wall in the ground, which enables to inject or insert a water stop plate, thereby stopping the permeated water in the ground.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a vertical pilot hole in the ground from the upper surface of the sloping ground. Drill a horizontal working hole that reaches the pilot hole from the lower surface corresponding to the pilot hole in the ground, form a slit between these pilot hole and the working hole, and provide a water blocking wall in this slit. It is characterized by. The invention according to claim 2 is characterized in that, in the invention according to claim 1, the slit is formed by a wire saw. The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the water blocking wall is made of a grout material. The invention according to claim 4 is characterized in that, in the invention according to claim 1 or 2, the water blocking wall is constituted by a plate-shaped body made of steel, vinyl, or concrete.

[0006]

In the above construction, when constructing the water blocking wall, a vertical pilot hole is drilled into the ground from the upper surface of the sloped ground, and the pilot surface is piloted from the lower surface corresponding to the pilot hole of the ground. Drilling sideways work pits that reach the holes, forming slits between these pilot holes and work pits, injecting grout material into these slits, or steel, vinyl, or concrete plates A water blocking wall configured by inserting a strip is provided. The slit is usually formed by a wire saw.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first embodiment of the present invention shown in FIGS. 1 to 3, 11 is a sloping ground, which faces the pilot hole 2 from the lower surface corresponding to the pilot hole 2 drilled from the upper surface. The horizontal working pit 12 and the pilot hole 2 or the working pit 12 is provided with the operating member 13 of the wire saw 4, and the operating member 13 is operated to operate the pilot pit 2 and the working pit 12. A slit 5 is formed between them as shown in FIG. 2. When this slit 5 is completed, as shown in FIG. 3, a pilot hole 2 and a capping 6 for covering the work pit 12 are installed, and the work pit 12 at the bottom stage is installed. Injection tube 7
Is inserted, and the grout material is injected through the injection pipe 7 to replace the air in the pilot hole 2, the slit 5 and the working pit 12 with the grout material, and the grout material is removed from the return pipe 8 attached to the capping 6. When it overflows, the injection of grout material is stopped to form the water blocking wall 9 made of grout material.

In the second embodiment of the present invention, although not shown in the drawings, a plurality of vertically oriented pilot holes are drilled at intervals from the surface of the ground into the ground, and between these pilot holes. Configure a slit, install capping covering both pilot holes to include this slit, insert an injection pipe into one pilot hole, inject grout material through this injection pipe, and in the pilot hole and slit When the grout material is used to replace the air of the grout material and the grout material overflows from the return pipe attached to the capping, the in-ground slit water stop wall construction method that stops the injection of the grout material and forms the water stop wall by the grout material One embodiment is a combination of one pilot hole 2 and the other pilot hole 2 of the water blocking wall method, and at least one of these pilot holes 2 is formed. Constitute a slit 5 between the pit 12,
The grout material is injected into these slits 5 in the same manner as described above. In these first and second embodiments, the water blocking walls 9 formed by using the slits 5 are all made of grout material, but instead of this, steel, vinyl, Alternatively, it may be constituted by a plate-shaped body made of concrete. Further, although the slit 5 is formed by the wire saw 4, it may be formed by other materials.

[0009]

The present invention is as described above. According to the invention of claim 1, a vertically oriented pilot hole is drilled from the upper surface of the sloping ground into the ground, and the lower part corresponding to the pilot hole of the ground is drilled. The horizontal working pit reaching the pilot hole from the surface is drilled, a slit is formed between the pilot hole and the working pit, and a water blocking wall is provided in the slit. The invention is the invention according to claim 1, wherein the slit is formed by a wire saw, and the invention according to claim 3 is the invention according to claim 1 or 2, wherein the water blocking wall is formed by a grout material. Since the invention according to claim 4 is the invention according to claim 1 or 2, since the water blocking wall is configured by a plate-shaped body made of steel, vinyl, or concrete, Sliding in the ground By forming, possible to inject or insert a grout or waterstop, whereby an excellent effect that the permeate in the soil can be water stop.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view showing an initial step of a first embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view showing an intermediate step of the above.

FIG. 3 is a schematic vertical sectional view showing a final step of the above.

[Explanation of symbols] 2 Pilot hole 4 Wire saw 5 Slit 6 Capping 7 Injection pipe 8 Return pipe 9 Water blocking wall 11 Sloping ground 12 Working pit 13 Operating member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-174131 (JP, A) JP-A-6-240659 (JP, A) JP-A-5-51920 (JP, A) JP-B-38- 16825 (JP, B1)

Claims (4)

(57) [Claims] 1. A vertical pilot hole is drilled from the upper surface of the sloping ground into the ground, and a horizontal working hole is drilled from the lower surface corresponding to the pilot hole of the ground toward the pilot hole. A slit water stop wall construction method in the ground, characterized in that a slit is formed between the pilot hole and the work pit, and a water stop wall is provided in this slit. 2. The in-ground slit water blocking wall construction method according to claim 1, wherein the slit is formed by a wire saw. 3. The in-ground slit water blocking wall construction method according to claim 1, wherein the water blocking wall is made of grout material. 4. The in-ground slit water blocking wall construction method according to claim 1, wherein the water blocking wall is constituted by a plate-shaped body made of steel, vinyl, or concrete.