A well sealing method for the dewatering well at the bottom of the foundation pit

Abstract

The invention discloses a well sealing method of a dewatering well at a bottom of a foundation pit. The method comprises the following steps: a pumping test is performed for the dewatering well required to be sealed; the depth of the well is measured; a dewatering well pipe (5) is coated with a steel pipe (8) having a water stop wing (7); a waterproof plate (4) at the bottom of the foundation pit is fully welded on the steel pipe; water is pumped with high capacity or the water is pumped by putting in a water filter tank (11); a filler is arranged and compacted; a steel plate is fully welded on the water stop wing of the steel pipe; a stressed rib at the inner edge of a baseplate is connected; and concrete is poured for sealing. The well sealing method of the dewatering well at the bottom of the foundation pit, provided by the invention, overcomes the defect of incomplete well sealing technology in the foundation pit construction, proposes a well sealing scheme for specific conditions of various dewatering wells in the foundation pit engineering, is clear in operation steps, is convenient and economical, and is excellent in promotion and application values.

Description

technical field [0001] The invention relates to a well sealing method for a dewatering well at the bottom of a foundation pit, belonging to the technical field of civil engineering construction. Background technique [0002] With the rapid development of the economy, various large-scale buildings are increasing, and deep foundation pits are becoming more and more common, and the sealing of deep foundation pit dewatering wells often becomes a key link in the entire construction, which directly affects the waterproofing and follow-up of the project. Whether the construction can proceed smoothly. However, for this aspect of construction, the national industry has not set relevant regulations, and each construction unit can only block it by itself based on experience. [0003] At present, most construction units usually adopt the method that when the excavation of the foundation pit is completed and the floor construction is carried out, a large amount of drainage is first perf...

AI Technical Summary

Problems solved by technology

This method can solve the problem of sealing part of the foundation pit. However, when the water output of the dewatering well is large or the construction requirements are strict, it often happens that the well sealing work cannot be completed at one time, and it is often necessary to seal the water pump into the well.

[0004] To sum up, the current sealing technology of the dewatering well at the bottom of the foundation pit is not perfect, and there is a disadvantage that the sealing operation cannot be successful at one time and often requires the abandonment of the pump

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