JP2832650B2 - Construction method of water stop wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a water-blocking wall for providing a water-impermeable continuous wall in a bank or a foundation ground.

[0002]

2. Description of the Related Art Conventionally, in order to prevent infiltration or leakage of water through a levee such as a river embankment, a shore embankment, and a storage levee, or through a foundation ground, a continuous water-impermeable structure has been provided in the embankment and the foundation ground. A water stop wall, which is a wall, is provided. This water stop wall is provided using concrete, asphalt, steel sheet pile, or impermeable clay sheet.

In the case of constructing such a waterproof wall, for example, using a sheet, a groove extending from the ground to the water-impermeable layer beyond the water-permeable layer of the foundation ground is excavated, and the sheet is inserted into the groove. , And the sheets are arranged so that the ends of the sheets overlap with each other, and the joint portion of each sheet and the lower end of each sheet are subjected to the water stopping process. As the sheet water stop treatment structure conventionally implemented,
While overlapping the joints of the adjacent sheets, expanding the groove around the joints of the sheet, filling the expanded part with a hardening agent such as mortar, and bringing the joints of the sheets into close contact with each other. By filling a filler into the bottom of the groove around the lower end of the, a certain water stopping performance is obtained.

[0004]

However, the water blocking wall using the above-mentioned conventional sheet has the following problems in terms of the reliability of the water stopping performance. That is, in the joint portion of the sheet, such as when the water blocking wall is constructed deeply, even if the joint portion of the sheet is overlapped and this portion is brought into close contact with the filler filled in the enlarged diameter portion of the groove, As the groove becomes deeper, the edge of the sheet is turned up, and water may permeate or leak from the turned up portion of the edge.

At the lower end of the sheet, a casting pipe for casting a filler is required. When the groove becomes deeper, the casting pipe needs to be inserted deeply, which requires large equipment and construction. There is a problem that the packing effect is low because only the filler is cast. Further, after the sheet is erected in the groove, it is necessary to fill the gap between the groove and the sheet with mortar or the like and to close the gap, which causes a problem that the construction of the water blocking wall becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a method for constructing a water-blocking wall capable of obtaining a highly reliable water-blocking structure and facilitating its construction. And

[0007]

According to the present invention, there is provided a method for constructing a water blocking wall according to the present invention, wherein a sheet-like member is formed in a bag shape having an opening only at an upper end, and a filler is filled inside the sheet-like member. The object of the present invention is to arrange the sheet-like members continuously in the grooves so that the joints of the adjacent sheet-like members are brought into close contact with each other and fill the grooves.

[0008]

According to the method of constructing the water blocking wall of the present invention, the filler filled in the bag-like sheet member causes the sheet-like member to swell over the entire groove, and the filler is filled between the sheet-like member and the groove. Without filling, the packing effect of the groove bottom can be obtained.
Further, in the joint portion of the sheet-shaped member, the side bag portion is inflated by the internal filler and closely adheres to the side portions of the adjacent sheet-shaped members over the upper and lower ends, whereby the adjacent sheet-shaped members are integrated, A highly reliable waterproof wall without continuous gaps is constructed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the structure of a sheet (sheet-like member) used in the present invention. As shown in FIG. 1, the sheet 1 is made of a water-impermeable vinyl sheet or the like, and the entire sheet 1 is formed in a bag shape having only an upper end opened. Further, at both end portions of the sheet 1, a bag portion 3 swelling outward and communicating with the inside 2 of the sheet 1 over the upper and lower ends is provided integrally. This bag part 3
Is made of a cloth material having both elasticity and water permeability, such as a civil engineering sheet, unlike the sheet 1 portion. The inside of the sheet 1 and the inside of the bag portion 3 are filled with a filler 4 such as mortar. Such a sheet 1
Is formed by folding one side of the sheet 1 into a bag shape, providing a bag portion 3 of another material integrally on the other side portion, and bonding the lower end portion to each other over both side portions.
Form into a bag.

As shown in FIG. 2, the sheet 1 having such a shape is formed such that, at the joint portion of the sheet 1 inserted and arranged in the groove 10, the bag portions 3 at the side end portions are filled with the filler 4 inside.
As shown in FIG. 3, at the lower end of the sheet 1, the bag-like sheet 1 expands due to the internal filler 4 and expands over the left and right ends. And a highly reliable water-blocking structure is obtained.

Next, a construction procedure for constructing a water blocking wall using the sheet 1 having the above water stopping performance will be described with reference to FIGS.

(1) Excavate the standing holes 11 at predetermined intervals from the ground to the foundation ground before excavating the trench 10 (see FIG. 4).
Each hole 11 is excavated to a depth that extends beyond the permeable layer to the impermeable layer. (2) The trench 10 is excavated, and the sheet 1 is built in the trench 10 (see FIGS. 5 and 6). As a method of excavating the groove 10,
For example, as shown in FIG.
The steel 30 is inserted from above and installed, and the groove 10 is excavated by a wire saw using the pair of H steels 30 as guides. When the excavation of the groove 10 is completed, the sheet 1 is erected and the H steel 30 is removed. According to this excavation method, 10
A thin groove 10 of about 30 mm can be excavated, which is extremely effective for inserting the sheet 1. (3) Excavating the adjacent groove 10 by the same method as above,
The sheet 1 is set in the groove 10 (see FIG. 7). (4) The inside 2 of the sheet 1 is filled with a filler 4 such as mortar (see FIG. 8). The filler 4 pressed into the inside of the sheet 1 is also filled into the bag portions 3 at both end portions of the sheet 1. This bag portion 3 is inflated by the filler 4 in the vertical hole 11,
It is in close contact with the side edge of the adjacent sheet 1 in the same vertical hole 11. In parallel with the filling operation, muddy water stored in the vertical holes 11 and the grooves 10 is pumped to the ground and discharged by a pump or the like. By filling the inside of the sheet 1 with the filler 4, the sheet 1 swells to fill the groove 10, and the gap between the water blocking walls 11, 11 is constructed without filling the gap of the groove 10. (5) The water blocking wall is constructed by repeating the above steps (1) to (4). As a result, the adjacent sheets 1 and 1 are integrated with each other, and a continuous water-stop wall having no gap is constructed.

According to this embodiment, the sheet 1 is formed in a bag shape, and the inside of the sheet 1 is filled with the filler 4, whereby
Since the sheet 1 expands without gaps to fill the groove 10, after the sheet is erected in the groove 10 as conventionally performed,
There is no need to fill the gaps around the sheet with mortar or the like, so that the construction of the water stop wall can be simplified and the construction can be facilitated. In addition, since the bag 3 at the side end of the sheet 1 is expanded by the internal filler 4 in the vertical hole 11, the bag 3 and the side end of the adjacent sheet 1 are closely attached to each other vertically, and the A highly reliable waterproof structure can be obtained. In addition, as the groove 10 becomes deeper, the lower edge of the sheet 1 is not turned up, so that a problem such as loss of water stopping performance does not occur.

A filler 4 filled in the sheet 1
Ensures that the lower end of sheet 1 is packed,
The problem that the material (such as mortar) for packing the lower end of the sheet 1 deviates does not occur. Groove 1
Equipment such as a casting pipe reaching the bottom of the zero is unnecessary, and the on-site equipment or on-site work is simplified.

Further, since the sheet 1 can be preliminarily processed into a bag at a factory, it is not necessary to perform the on-site work of overlapping the joints of the sheets 1 and 1 and pressing them together as in the related art.

[0017]

As described above, according to the present invention, the following excellent effects can be obtained. By filling the bag-shaped sheet-like member with the filler, the sheet-like member arranged in the groove swells over the entire groove, thereby eliminating the need for filling between the groove and the sheet-like member, and constructing the water blocking wall. It can be done easily. Further, in the joint portion of the sheet-shaped member, the side bag portion expands due to the internal filler and adheres to the side portions of the adjacent sheet-shaped members over the upper and lower ends, so that the adjacent sheet-shaped members are integrated, It is possible to construct a highly reliable water stop wall without continuous gaps. In particular, the sheet-like member is formed in a bag-like shape, and the inside of the sheet-like member can be densely and reliably filled with the filler, and there is no deviation of the filler, so that a reliable packing action can be obtained. Furthermore, since the bag of the sheet-shaped member can be pre-processed in a factory or the like, and at the site, it is easy to fill the inside of the sheet-shaped member arranged in the groove with the filler. This has the effect of simplifying the construction at the site.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of a sheet-like member.

FIG. 2 is a horizontal sectional view showing a part of a water stop wall.

FIG. 3 is a front sectional view showing a part of a water stop wall.

FIG. 4 is a construction procedure diagram of a water stop wall.

FIG. 5 is a construction procedure diagram of a water stop wall.

FIG. 6 is a construction procedure diagram of a water stop wall.

FIG. 7 is a construction procedure diagram of a water stop wall.

FIG. 8 is a construction procedure diagram of a water stop wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet-shaped member 2 Inside 3 Bag part 4 Filler 10 Groove 11 Vertical hole.

──────────────────────────────────────────────────続 き Continued on the front page (72) Takanori Hirai, 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Yutaka Katsura 1-2-3, Shibaura, Minato-ku, Tokyo Shimizu (56) References JP-A-4-63018 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 19/12 E02B 3/04

Claims (1)

(57) [Claims] 1. A method for constructing a water blocking wall in which a groove is excavated in the ground and a sheet-shaped member is continuously arranged in the groove to form a water-blocking wall. Formed in an open bag shape, filling the inside of the sheet-like member with a filler, and filling each of the sheet-like members with the joints of the adjacent sheet-like members and filling the grooves with each other, in the grooves. A method for constructing a water stop wall, which is arranged continuously.