A large water depth curtain grouting method
A curtain grouting and large water depth technology, applied in construction, infrastructure engineering and other directions, can solve the problems of water surface platform layout and fixing difficult water surface operation platforms, etc., to shorten the construction period and improve the construction efficiency.
Active Publication Date: 2018-06-22
四川共拓岩土科技股份有限公司
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Problems solved by technology
Because when the depth is exceeded, it will be difficult to arrange and fix the surface platform, underwater drilling positioning and orifice pipe casting must be supplemented by divers, and the water level change in the reservoir area will have a greater impact and inconvenience on the surface operation platform. urgent problem
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Embodiment Construction
[0024] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:
[0025] A large water depth curtain grouting method, it comprises the following steps: it comprises the following steps:
[0026] S1. Construction preparation, including drilling rigs and construction equipment in place, construction personnel entering the site and determining the position of the underwater curtain grouting work surface;
[0027] S2, such as figure 1 As shown, the water surface platform is constructed, and the specific construction steps are as follows: first place pontoons 1 on the water surface of the dam, the pontoons 1 are arranged at intervals and arranged along the curtain grouting direction of the underwater curtain grouting work surface 2, and then two adjacent pontoons 1 Build a pontoon 3 between them, install the sleeve 4 on the pontoon 3, fix the vertical guide rod 7 on th...
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The invention discloses a large-water-depth curtain grouting method. The large-water-depth curtain grouting method comprises the following steps: step S1, performing construction preparation; step S2, building a water surface platform; step S3, measuring a hole site by using a surveying instrument; step S4, determining a drilling position in an under-water curtain grouting operation plane (2); step S5, using a drill bit to sleeve an under-water steel bar by a water surface platform drilling machine operator with assistance of a diver before performing curtain grouting drilling operation on the under-water curtain grouting operation plane (2), and then starting the drilling machine to perform drilling slowly so as to guarantee that an operation point of the drilling machine is positioned at the drilling position; step S7, manufacturing an orifice pipe and using a plurality of geological steel tubes (11), wherein the contact positions of two adjacent geological steel tubes (11) are connected by adopting a screw thread connector, and meanwhile the connector is reinforced by a clamp, so that the orifice pipe (12) is manufactured; step S8, imbedding the orifice pipe and reinforcing under water; step S9, constructing curtain grouting; step S 11, leaving the field and performing later-stage maintenance. The large-water-depth curtain grouting method disclosed by the invention has the beneficial effect of being capable of performing curtain grouting construction under a 55m to 60m water depth condition.
Description
technical field [0001] The invention relates to the technical field of curtain grouting on an underwater operation surface under deep water conditions, in particular to a method for curtain grouting in large water depths. Background technique [0002] The water stored in the concrete face rockfill dam reservoir area is mainly used for hydropower generation. In order to prevent the water in the dam from seepage from the foundation to the mountain, the seepage control system of the concrete face rockfill dam is usually used for anti-seepage. The anti-seepage system of the concrete face rockfill dam consists of anti-seepage panels, plinths arranged on both sides of the anti-seepage panels and curtain grouting applied on the plinths. To the outside, the mountain is loose. In order to achieve a better anti-seepage effect, the usual construction method is to perform curtain grouting on the toe board to form a water-stop curtain, which can effectively prevent the dam water from see...
Claims
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IPC IPC(8): E02D19/18E02D15/06
CPCE02D15/06E02D19/18
Inventor 钟久安
Owner 四川共拓岩土科技股份有限公司