Water sealing valve device, well plugging structure and construction method of well plugging structure

Abstract

Provided are a water sealing valve device, a well plugging structure and a construction method of the well plugging structure. The water sealing valve device comprises a necking casing pipe, a flangering plate at a pipe opening, a waterproof rubber pad and a flange blind plate, wherein the waterproof rubber pad and the flange blind plate are sequentially connected; and the necking casing pipe comprises a large-diameter section on the lower portion and a small-diameter section on the upper portion, the large-diameter section and the small-diameter section communicate with each other, and the center axis of the large-diameter section and the axis of the small-diameter section are overlapped. The well plugging construction method specifically comprises the following steps that the size, water level and the pump output of a dewatering well are tested, and a water sealing valve well plugging device and a self-priming water pump are manufactured; the water sealing valve device is installed,the large-diameter section is located at the designed water level elevation, and the small-diameter section is connected with the self-priming water pump through a water pipe; a waterproof protectionlayer, a steel bar project and the like are constructed in the drainage state of the dewatering well; concrete water sealing in the necking casing pipe is carried out, the pipe opening is sealed through the waterproof rubber pad and the flange blind plate, and finally construction of a foundation bottom plate layer is completed. By means of the water sealing valve device, the well plugging structure and the construction method of the well plugging structure, water sealing and well plugging can be effectively carried out, operation is simple and convenient, construction of the bottom plate project can be completed in the drainage state of the dewatering well, and the construction time is shortened.

Description

technical field [0001] The invention relates to the field of civil engineering construction, in particular to a water closing valve device, a well sealing structure and a construction method thereof. Background technique [0002] In building construction, there are more and more deep foundation pit projects and drainage projects. For areas with large foundation pit area and depth and relatively rich groundwater, drainage is only carried out through the scheme of arranging dewatering wells around the periphery. Not only the cost of engineering measures is high, but many Under the circumstances, the demand for precipitation can no longer be met. In engineering dewatering, it is more and more common to install dewatering wells inside the core areas of buildings and foundation pits, but the safety of closing water and sealing wells is often poor when setting dewatering wells inside, which can easily affect the quality of the project. Therefore, in order to meet the construction...

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Problems solved by technology

[0003] The present invention proposes a water closing valve device, a well sealing structure and a construction method thereof, through the water closing valve device's dewatering measures and closed water sealing process, it is used to solve the problem of high water output without affecting the construction progress of the upper part of the dewatering well, which is safe and effective The problem of shutting water and sealing wells

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