Base concrete cushion layer water damage preventing structure for deep foundation pit and construction method

Abstract

The invention discloses a base concrete cushion layer water damage prevention structure for a deep foundation pit and a construction method, and relates to the technical field of base concrete cushion layer water damage prevention structures for deep foundation pits. According to the technical scheme, the base concrete cushion layer water damage prevention structure for the deep foundation pit comprises a foundation pit formed in an undisturbed soil layer, wherein fender posts are arranged on the pit walls of the two sides of the foundation pit; the fender posts positioned at two sides of the foundation pit are supported through inner supports; a rubble replacing and filling layer is laid on the undisturbed soil layer at the bottom of the foundation pit; and longitudinal drainage grooves are formed in the middle of the rubble replacing and filling layer. The concrete cushion layer water damage prevention structure has the beneficial effects that the concrete cushion layer water damage prevention structure capable of efficiently performing flow guide on gushing water of underground water, relieving impact of the underground water, preventing cushion layer concrete from being damaged and achieving smooth and natural construction procedures is created, a construction method of the structure is provided in a targeted manner, and graded broken stones are laid to buffer jacking force of the underground water, so that the cushion layer is effectively prevented from cracking; and the construction process is smooth, the water diversion efficiency is maximized, the feasibility is high, and the bottom plate protection layer is enabled to be prevented from being damaged by water.

Description

technical field [0001] The invention relates to the technical field of a waterproof and encroachment structure of a concrete cushion at the base of a deep foundation pit, in particular to a waterproof and encroachment structure and a construction method for a concrete cushion at the base of a deep foundation pit. Background technique [0002] During the design process of municipal utility tunnels, rainwater box culverts, rainwater and sewage pipes and other underground structures, consider the spatial relationship between the underground structures and other new and existing structures, and there will be more than 10m of covering soil thickness, which will lead to construction The difficulty increases, the construction is more affected by the groundwater, and the quality of the main structure and auxiliary construction is difficult to be controlled. [0003] Before the construction of the main structure of the deep foundation pit, it is usually necessary to replace the rubbl...

AI Technical Summary

Problems solved by technology

[0002] During the design process of underground structures such as municipal utility tunnels, rainwater box culverts, and rainwater and sewage pipes, the upper and lower levels of the underground structures and other new and existing structures should be considered. The location and space relationship, there will be more than 10m of overlying soil thickness, which will increase the difficulty of construction, the construction will be more affected by groundwater, and the quality of the main structure and auxiliary construction will be difficult to control

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