Combined plugging device of high-water-pressure precipitation well and plugging method

Abstract

The invention provides a combined plugging device of a high-water-pressure precipitation well. The combined plugging device comprises a downcast pipe well, a waterproof casing pipe, an upper water stop ring, a lower water stop ring and a screwed plug. The top of the downcast pipe well is sleeved with the waterproof steel casing pipe, so that the upper end of the waterproof steel casing pipe is higher than foundation trench soil. The lower water stop ring is in contact with the foundation trench soil. The upper water stop ring is fixedly connected with the waterproof casing pipe. The screwed plug is fixed to the middle of the upper water stop ring. The invention further provides a plugging method of the device. The plugging method comprises the steps that the downcast pipe well is firstly sleeved with the waterproof steel casing pipe, so that the lower water stop ring is in contact with a foundation trench; and a plain concrete cushion layer is poured, waterproof material construction is carried out on the face layer of the plain concrete cushion layer, construction of a waterproof protection layer is carried out, a thick steel plate is welded to the middle of the upper water stop ring, the screwed plug is used for mechanical plugging, and later concrete pouring is completed. Procedures are simple, time and labor are saved, the seepage prevention effect is good, and a second defense line for solving seepage of an underground structure is formed.

Description

technical field [0001] The invention relates to a building construction device, more specifically, the invention mainly relates to a plugging device for a high water pressure dewatering well and a plugging method thereof. Background technique [0002] In recent years, with the rapid development of modern buildings, there are more and more high-rise, super high-rise, and main buildings with basements. When the underground structure and main body are backfilled after construction, the original precipitation wells have to be blocked in advance. The traditional method is to add a waterproof steel casing with a water-stop ring on the outside of the dewatering well. The micro-expanded fine stone concrete of a grade higher than the bottom plate is used in the dewatering well. The filling height in the well is 3m lower than the nozzle, and the rest Pour at the same time when pouring the bottom slab. With such a construction method, if the vibration is not dense during the building ...

AI Technical Summary

Problems solved by technology

With such a construction method, if the vibration is not dense during the building construction process, the groundwater pressure will increase when the water level rises, resulting in water leakage from the bottom plate, which will cause backfilling of the basement core soil, construction of the surface of the underground structure, decoration construction, etc. The delay in the construction period will cause quality hazards such as bulging and cracking of the completed floor decoration structure surface, which will not only delay the construction period, increase the difficulty of water leakage treatment, reduce the profit of the project, but also leave quality and safety hazards for the project

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