JP3196093B2 - Filling method for the gap behind the existing 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 filling a space on the back of an existing wall.

[0002]

2. Description of the Related Art Heretofore, when there is a gap continuously from the top end of a retaining wall, sand is formed into muddy water, thrown in from the upper portion of the back of the retaining wall, and then poured into the gap to be filled.

[0003]

Problems to be Solved by the Invention The prior art has the following problems. <B> It is not possible to fill the voids deep in the retaining wall (3 m or less from the top). <B> Independent voids and voids into which water does not flow cannot be filled. <C> Work will be performed from the back of the retaining wall, and work sites such as railway lines will be restricted. <D> If the drainage is not sufficient, the water pressure on the back of the retaining wall increases, which may cause structural problems.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a method for filling a void in the back of an existing wall having a water permeable material disposed on the back.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in an existing wall in which a water-permeable substance is arranged on the back of an existing wall, a gap existing from the surface of the existing wall to the back is searched, and a gap exists. At the time, the existing wall is characterized in that a through-hole penetrating from the surface to the back surface where the void exists is formed in the existing wall, a water-permeable material is injected as a filler from the through-hole, and the void is filled. In the method of filling the back space.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. <A> Outline of the embodiment In the embodiment, the retaining wall 1 is used as the existing wall. The material is not limited to the retaining wall 1 and any material having water permeability may be disposed between the back of the existing wall and the ground. In the case of the retaining wall 1, the back 13
The back chestnut stone 3 is packed between and the ground 4. If the ground is sandy, it is eroded by the infiltration water, and a gap 2 is formed at the boundary between the back rock 3 and the ground 4. The back chestnut stone 3 moves into the gap, and the gap 2 is formed in contact with the retaining wall 1, or the gap 2 is formed inside the back chestnut 3. The surface of the ground may collapse due to the voids 2. As a method of exploring the gap 2, for example, an electromagnetic wave is used. When the gap 2 is searched, a filling hole 11 is opened in the retaining wall 1, and a water-permeable filling material 6 is injected.

<B> Filler A mixture of coarse aggregate and fine aggregate was used as the filler. The material is not limited to the aggregate, and any material can be used as long as it is a material that allows water to pass through easily and that can be filled in the gaps 2. The coarse aggregate used was a dry coarse aggregate having a water content of 0.5% or less. The particle size of the coarse aggregate is shown in Table 1 and its components are shown in Table 2. The particle size contained in the coarse aggregate is 5% through a sieve of 5 mm, and a maximum of 1
It passes 100% at 5 mm.

[0008]

[Table 1]

[Table 2]

The fine aggregate has a water content of 0.5 as silica sand.
% Or less was used. The particle size of the fine aggregate is shown in Table 3 and its components are shown in Table 4. The particle size contained in fine aggregate is
Sieve eyes pass 15% at 2.5mm, max 10mm
Pass 100%.

[0010]

[Table 3]

[Table 4]

[0011] For example, 25% by weight of coarse aggregate
And 75% by weight of fine aggregate were mixed and transferred to the cavity 2 using compressed air. By mixing coarse and fine aggregates,
The water permeability is good, and the gaps between the coarse aggregates are clogged with fine aggregates to prevent the inflow of the sand in the ground and the gaps are not generated in the ground. If the aggregate contains moisture, the hose may be clogged, or the injected aggregate may form a peak in the gap 2, and the entire gap may not be filled. Therefore, such a problem is solved by using dried aggregate.

<C> Filling method The gap portion 2 emits an electromagnetic wave from the surface 12 of the known retaining wall 1, measures the reflected wave, and determines the presence or absence of the gap portion 2 based on the intensity distribution of the reflected wave. Measure the degree of size. However, not limited to electromagnetic waves, sound waves and the like may be used. FIG.
Is the reflection distribution of the electromagnetic wave measured from the surface 12 of the retaining wall 1. The point 21 where the gap 2 is measured is indicated by a dot, and the point 22 where the gap 2 is larger is indicated by a net. The height of the retaining wall is 6 m. A filling hole 11 is opened in the retaining wall 1 at the measured location, and the void 2 is confirmed. The filling material 6 is put into the filling tank 53, and compressed air is sent to the back surface 13 of the retaining wall 1 by the air compressor 51 through the valve 52 and the lower part of the filling tank 53 via the pressure feed pipe (50 mm). The filler 6 is drawn by the compressed air, drawn out of the filling tank 53 to the pressure feed pipe 54, and sent out to the gap 2. The filling hole 11 facilitates the transfer of the filler through the sheath tube 55 and can be transferred to a predetermined gap portion 2. Filling material 6
When the pressure is fed by air, the size of the filling hole 11 is 10 mm in diameter.
It is preferably 0 mm, and the filling hole 11 is preferably provided at the upper part of the gap 2, and it is preferable that two or more filling holes 11 are provided in the same gap 2. In this case, the interval between the filling holes 11 is set to 1.5
Even with m, the voids 2 could be completely filled with the filler. In the gaps shown in FIG. 2, some of the gaps are loose but have no gaps, and the other gaps have a filler of 10 kg to 40 kg.
It was filled in the range of 0 kg. In the above-mentioned filling step, filling is performed in real time by filling gaps while performing exploration using a conventional gap exploration device such as an electromagnetic wave, so that gaps can be filled accurately. In addition, although the Example of this invention was made into the retaining wall, it is not restricted to this, When a back surface of a wall has water permeability, a void part is easy to generate | occur | produce, and in this case, this invention can be applied.

[0013]

According to the present invention, the following effects can be obtained. <A> In a wall having a back surface having water permeability, a space on the back surface can be easily detected, water permeability is maintained, a space is hardly generated, and a space can be filled. <B> The gap can be filled regardless of the position where the gap exists. <C> The state of filling after filling can be confirmed. <D> Since the construction can be performed without destroying the retaining wall, there is no influence on the workpiece located above the retaining wall. <E> Since the machine used can be reduced in size, it can be installed even if the work space is narrow.

[Brief description of the drawings]

FIG. 1 is a diagram showing the filling of a void on the back of a retaining wall.

[Fig. 2] Fig. 2 shows a measurement of the gap from the surface of the retaining wall to the back of the wall using electromagnetic waves.

FIG. 3 is a flowchart of a process for filling a void portion on the back surface of the retaining wall.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yukio Nagata 3-13-4-A-706 Miyazaki-ku, Kawasaki-shi, Kanagawa A-706 (72) Inventor Kenichi Suzuki 1564-26, Noritsukecho, Takasaki-shi, Gunma (72) Invention Applicant Shozo Suzuki 1396-4-201, Konakadai-cho, Hanamigawa-ku, Chiba-shi, Chiba (72) Inventor Tsutomu Sato 3-13-4-4, Miyazaki, Miyamae-ku, Kawasaki-shi, Kanagawa Prefecture A-303 (56) References JP-A-Hei-4 JP-A-330116 (JP, A) JP-A-64-17915 (JP, A) JP-A-6-108471 (JP, A) JP-A-58-189427 (JP, A) JP-A-63-280122 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 3/12 101 E02D 37/00 G01V 3/12

Claims (4)

(57) [Claims] Claims: 1. In an existing wall having a water-permeable substance disposed on the back of the existing wall, a gap existing on the back of the existing wall is searched from the surface of the existing wall. A method for filling a back space of an existing wall, comprising: opening a through hole penetrating the back surface where the space exists, injecting a water-permeable material as a filler from the through hole, and filling the space. 2. The method for filling a back space of an existing wall according to claim 1, wherein a dry mixed material of coarse aggregate and fine aggregate is used as the filler, A method for filling the gap behind the existing wall, characterized by pumping the gap with air. 3. A method for filling a back gap of an existing wall according to claim 1, wherein the existing wall is a retaining wall. 3. The existing wall according to claim 1, wherein the existing wall is a retaining wall. Method for filling the back space of 4. A method of filling a back gap of an existing wall according to any one of claims 1 to 3, wherein a gap existing from the surface of the existing wall to the back thereof is searched with an electromagnetic wave. Filling the gap with a filler while monitoring the gap, filling the gap behind the existing wall.