Basement bottom plate dewatering well mouth plugging casing and construction method

Abstract

The invention discloses a basement bottom plate dewatering well mouth plugging casing and a construction method. The basement bottom plate dewatering well mouth plugging casing comprises a vertically-arranged steel pipe, wherein a stabilizing ring is welded on the outer circumference of the bottom of the steel pipe, a water retaining ring is welded on the outer circumference of the upper portion of the steel pipe, a flange plate is welded on the outer circumference of an upper opening of the steel pipe, a cover plate is arranged on the flange plate, and a rubber washer is arranged between the flange plate and the cover plate. In addition, the construction method adopts the plugging casing to perform basement bottom plate dewatering well mouth plugging. A double-insurance measure is adopted for the casing. By adopting the construction method, the tubular well plugging can be performed before basement construction completion, backfill completion and post-cast strip completion, underground water is continuously extracted from the basement, and the effective height of a plugging rear bottom plate is ensured.

Description

technical field [0001] The invention relates to a tube well plugging technology, in particular to a wellhead plugging casing of a basement bottom plate dewatering well and a construction method. Background technique [0002] In the Yangtze River Delta region, the soil layer is mostly silt soil, so it is suitable to use tube wells for precipitation. [0003] In the construction stage of the basement, in order to reduce the groundwater level, the precipitation requirement is to lower the groundwater level below the design elevation according to the design requirements, so as to prevent the floor from floating. Need to continue pumping, but also need to keep a part of the tube well, so there is a problem of tube well plugging. [0004] The traditional tube well plugging method is to hang a small bucket on the mouth of the tube well to prevent concrete from entering the hole after stopping the precipitation, mix the concrete with sealing spirit, rapid hardening cement, plugging...

AI Technical Summary

Problems solved by technology

This method is because the water level rises quickly after the precipitation stops, and the water level may rise before the cement hardens, and the squeezed concrete seeps out, causing air holes or cracks to form on the concrete surface, and water leakage causes the sealing to fail.

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