Anti-seepage treatment method for collapsed accumulation body
A processing method and technology of accumulation body, which are applied in construction, infrastructure engineering and other directions, can solve the problems of large gap between solitary stones and inability to form anti-seepage walls, and achieve the effect of ensuring the effect of grouting
Active Publication Date: 2022-05-27
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Problems solved by technology
[0003] The invention provides an anti-seepage treatment method for collapsed deposits, which solves the problem that the gap between the isolated stones in the collapsed deposits is large and there is groundwater flow, and the problem that an anti-seepage wall cannot be formed if grouting is directly carried out
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[0025] The present invention will be further described below in conjunction with the examples.
[0026] The dam site area of a water conservancy project is located in a collapsed deposit. The collapsed deposit is mainly composed of solitary rocks. The diameter of the solitary rocks on the surface is up to 7m. The parent rock of the solitary rocks is quartzite, which is a hard rock. The gap is large. Exploration revealed that the thickness of the collapsed deposits was greater than 40m, and during the drilling process, many places were leaking water, and there was almost no water return phenomenon during the whole process. In the lower reaches of the river, groundwater can be seen flowing out of the collapse deposits, and the velocity and flow are relatively large. According to the needs of the project, the depth of the cofferdam anti-seepage wall is designed to be 20m, so the construction is difficult.
[0027] According to the method of the present invention, the gap betw...
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The invention discloses an anti-seepage treatment method for a collapsed accumulation body, relates to the field of anti-seepage engineering, and solves the problems that gaps of arc block stones in the collapsed accumulation body are large, underground water flows, and if grouting is directly carried out, an anti-seepage wall cannot be formed. According to the technical scheme, the anti-seepage treatment method for the collapsed accumulation body comprises the steps that firstly, a construction platform is formed on the surface layer of the collapsed accumulation body, the position of an anti-seepage wall is determined, and a drilling position is marked; secondly, drilling holes in the drilling positions, filling the drilled holes with gravel sand, vibrating the drilled holes, and filling gaps between the drilled holes and the collapsed accumulation body with the gravel sand in a manner of circularly drilling and filling the drilled holes with the gravel sand; and finally, drilling is conducted on all the drilling positions again, grouting is conducted, and the complete diaphragm wall is formed. According to the method, the gravel sand is filled into the drill hole and vibrated, gaps in the collapsed accumulation body are sealed, the flow speed and flow of underground water are reduced, after grouting, the gravel sand and grout are well combined, and the ideal seepage-proofing effect is achieved.
Description
technical field [0001] The invention relates to the field of anti-seepage engineering, in particular to a method for constructing an anti-seepage wall in a collapsed accumulation body containing a large number of boulders and gaps. Background technique [0002] Collapsing deposits are often composed of solitary stones, which have the characteristics of large thickness and large gaps. Generally, groundwater flows inside the collapsing deposits, and the flow rate and flow are relatively large. When it is necessary to make an anti-seepage wall in the collapsed accumulation body, drilling and grouting according to the existing technology will cause serious leakage and running of the slurry, and the collapsed accumulation body cannot be effectively consolidated to form an anti-seepage wall. SUMMARY OF THE INVENTION [0003] The invention provides an anti-seepage treatment method for a collapsed accumulation body, which solves the problem that the gap between the boulders in the...
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IPC IPC(8): E02D19/18E02D15/02E02D19/04
CPCE02D19/18E02D15/02E02D19/04E02D2300/0018
Inventor 张青宇邓卫东黎昌有冉从彦包恩泽
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE