Periphery water stop structure of tunnel plug and setting method thereof
A technology for plugging and tunneling, which is applied in the direction of tunnels, tunnel linings, mining equipment, etc. It can solve the problems of easy damage, water-stop sheet, and troublesome process of digging the surface concrete layer, so as to improve the anti-seepage effect, simple construction, highly reliable effect
Active Publication Date: 2011-01-19
POWERCHINA CHENGDU ENG
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Problems solved by technology
The obvious problem is that the process of cutting the surface concrete layer is cumbersome, and it is easy to damage the water-stop sheet
Method used
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Embodiment Construction
[0020] The present invention will be further described below in conjunction with accompanying drawing.
[0021] like figure 1 As shown, when pouring the concrete foundation 4 in the vertical formwork, the structural steel bar 6 should be bent at the position where the water-stop sheet 1 is to be installed, so that the water-stop sheet 1 and the connecting member 2 have enough buried positions; the connecting member 2 can use the I-shaped Steel, respectively located on the upstream and downstream sides of the water stop sheet 1, when fixing, the installation position of the protective steel cover plate 3 should be reserved. The concrete foundation 4 is then erected and molded. When setting up the mold, the groove 8 should be reserved. After removing the formwork, press the water-stop sheet 1 to make it cling to the concrete surface of the groove 8, then install the steel cover plate 3, and fix it on the connecting member 2 with continuous four-week welds, that is, the water-s...
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The invention discloses a periphery water stop structure of a tunnel plug. One part of the water stop sheet of the water stop structure is pre-embedded in concrete foundation; the inner wall of the concrete foundation is reserved with a groove; the part of the water stop sheet, which is not pre-embedded in the concrete foundation, is contained in the groove after bent; and the opening of the groove is provided with a cover plate capable of opening. The invention also provides a setting method of the water stop structure, specifically comprising the following steps: when an elevated module is adopted to pour the concrete foundation, one part of the water stop sheet is pre-embedded in the concrete foundation, and a groove is reserved on the inner wall of the concrete foundation; after the concrete foundation is poured by adopting the elevated module, the part of the water stop sheet, which is not pre-embedded in the concrete foundation, is contained in the groove after bent; the opening of the groove is provided with a cover plate capable of opening; and before the plug is poured, the cover plate is opened, the water stop sheet is straightened, and the plug is poured to block a tunnel. The setting method of the invention has few working procedures, and simple and convenient construction and can effectively protect the water stop sheet.
Description
technical field [0001] The invention relates to a surrounding water-stopping structure of a tunnel and a temporary diversion hole plug and a setting method thereof, and is suitable for diversion tunnels in water conservancy and hydropower projects, temporary diversion holes in dams, construction branch tunnels passing through anti-seepage curtains and traffic Water retaining plug for hole sealing. Background technique [0002] In the construction of water conservancy and hydropower projects, according to the needs of water flow control during the construction period, diversion tunnels, temporary diversion bottom holes in the dam, and various construction branch tunnels and traffic tunnels are often set up to meet construction and traffic requirements. With the progress of the project, after the corresponding diversion and traffic tasks are completed in each cavern and orifice, concrete plugs are required to be used for sealing. In terms of construction, the construction con...
Claims
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Inventor 唐忠敏郑声安张敬叶发明余挺
Owner POWERCHINA CHENGDU ENG