Steel barrel type precipitation well sealing appliance and sealing method

Abstract

The invention provides a steel barrel type precipitation well sealing appliance and a sealing method. The sealing appliance comprises an annular base attached to the outer wall of the top of a precipitation well. The annular base is upwards connected with a sealing barrel. A sealing cover plate is installed at the top of the sealing barrel. The precipitation well is filled with graded sand and stones. The position, from the graded sand and stones to the sealing cover plate, in the sealing barrel is filled with slight expansion waterproof concrete which is one grade higher than raft structure concrete. A sealing shell body composed of the sealing barrel and the sealing cover plate is outwards and sequentially provided with a waterproof layer and a fine aggregate concrete layer. The sealing method comprises the steps that the annular base and the sealing barrel are integrally welded at first and arranged above a well opening of the precipitation well in a sleeving mode; after precipitation is completed, the precipitation well is filled with the graded sand and stones; then the sealing barrel is filled with the slight expansion waterproof concrete; the sealing cover plate is installed at an upper opening of the sealing barrel; and the sealing shell body composed of the sealing barrel and the sealing cover plate is outwards and sequentially provided with the waterproof layer and the fine aggregate concrete layer, so that the anti-seepage effect is good.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a steel cylinder type precipitation well sealing device and a sealing method. Background technique [0002] With the rapid advancement of urbanization and the increase of above-ground buildings, more and more buildings consider the use of underground space, and there are more and more deep foundation pits and large foundation pits. The treatment of groundwater during foundation pit excavation has also attracted more and more attention. Foundation pit precipitation has a greater impact on the surrounding environment and the safety of the foundation pit. For foundation pits with large water level drawdown and large precipitation area, it is often necessary to dewater both inside and outside the pit at the same time to meet the requirements of stable support and normal construction in the pit. However, the treatment of the dewatering well in the foundation pit has also become ...

AI Technical Summary

Problems solved by technology

[0003] The traditional treatment method of dewatering wells is to bury the dewatering wells in the pit at the same time as the cushion layer is constructed. However, for projects with large foundation pit areas, large water level drawdowns, and timely replenishment, this method of burying dewatering wells cannot meet the needs of foundation pits. Requirements for stable and normal operation

Images