Construction method of comprehensive dewatering and draining system of deep foundation pit

Abstract

The invention relates to a construction method of a comprehensive dewatering and draining system of a deep foundation pit. The construction method comprises the steps of (1) conducting construction preparation; (2) laying retaining wall intercepting and draining system; (3) constructing a cast-in-situ draining ditch; (4) laying a draining blind bitch; (5) laying a water collecting channel and (6)constructing a grouted sealing body in the channel. The construction method of the comprehensive dewatering and draining system of the deep foundation pit has the beneficial effects that a water bodydischarged out by wall side draining pipes is collected by means of side wall intercepting ditches, the water body is converged into ditch bottom settling ponds through connection water pipes, so thatthe influence of the water body on the stability of the foundation pit is lowered, and construction environment is protected; meanwhile, waist beam hanging boards and hanging board base boards are connected with built-in anchor plates preset in cross strut waist beams through hanging board connection bolts, a platform hanger rod and a ditch bottom support plate provide support for the side wall intercepting ditches, so that the layout difficulty of the support system is lowered, and the bearing capacity of the support system is improved; each wall side draining pipe is provided with rectangular or oval water seepage slotted holes, a pipe periphery inverted filter is arranged on the outer side of each wall side draining pipe, and therefore the possibility of clogging of the wall side draining pipes can be effectively lowered.

Description

technical field [0001] The invention relates to a construction method of a comprehensive drainage system for deep foundation pits that can improve the drainage effect of foundation pits, increase the efficiency of on-site construction, and reduce the difficulty of laying the drainage system, belongs to the field of foundation pit engineering, and is suitable for construction projects of drainage of deep foundation pits. Background technique [0002] When excavating deep foundation pits in areas with high groundwater levels, the water level and head pressure in the excavation area are often important factors affecting the stability of deep foundation pits. In this regard, a series of engineering measures are often taken in the project to reduce the water level in the foundation pit and reduce seepage damage. [0003] In the prior art, there is a structure for foundation pit dewatering and drainage, which is characterized in that the water collecting pipe is composed of steel ...

AI Technical Summary

Problems solved by technology

The foundation pit drainage structure can improve the drainage efficiency of the foundation pit to a certain extent, solve the problem of water pump clogging, and at the same time strengthen the side wall of the foundation pit and the base soil. The efficient layout and closure of the sump has not been covered yet, and these problems are often important problems faced during the construction of foundation pit dewatering

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