Underground construction blind shaft drainage system and construction method

Abstract

The invention belongs to the field of building construction, and particularly relates to an underground construction blind shaft drainage system and a construction method. The underground constructionblind shaft drainage system comprises a water collection pit arranged in a deep foundation pit in an excavation, a pumping system arranged in the water collection pit and a drainage ditch arranged atthe deep foundation pit top in an excavation; the pumping system is a submerged pump with a protective shell, and water in the water collection pit is discharged through the submerged pump; and filtering fillers are arranged at the periphery of the protective shell of the submerged pump of the water collection pit in a filling mode, construction is carried out after a foundation pad layer, a waterproof later and a concrete layer are sequentially poured on a cob wall, and corresponding backfill of all functional layers is carried out on the water collection pit before a raft is poured. The underground construction blind shaft drainage system has good stability and high anti-interference performance; a drainage pipe does not penetrate through the waterproof layer and a raft foundation, construction is not interfered, water pumping cannot be stopped in the overall process of pouring, the situation that drainage is stopped in the concrete pouring process due to the fact that the drainagepipe penetrates through the foundation is avoided, and the problem of leakage existing in waterproofing of the raft foundation is solved; and the whole construction operation is safe and reliable, andthe quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to an underground construction blind well drainage system and a construction method. Background technique [0002] In the construction of building foundations in areas with abundant groundwater, during the stages of foundation earthwork excavation, cushion construction and foundation raft construction, it is necessary to continuously pump out the drainage in the foundation pit to ensure normal construction and construction quality. The traditional construction technology has the following technical problems: First, the secondary tube well around the raft foundation is used for dewatering, which has the problems of long construction period, difficult drainage operation, and poor effect; If the waterproof layer is installed, it will interfere with the cushion construction, waterproof construction and the binding of the raft steel bars. When pouring the raft, cut off th...

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Problems solved by technology

The traditional construction technology has the following technical problems: First, the secondary tube well around the raft foundation has the problems of long construction period, difficult drainage operation, and poor effect; If the waterproof layer is installed, it will interfere with the cushion construction, waterproof construction and the binding of the raft reinforcement. When pouring the raft, cut off the drainage pipe and rely on the raft concrete to seal the drainage pipe. There are hidden dangers in the construction quality of slab concrete pouring

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