System and method for controlling deformation of deep and large foundation pit through partition unloading

Abstract

The invention relates to the field of construction of deep and large foundation pits, and in particular relates to a system and a method for controlling deformation of a deep and large foundation pit through partition unloading. The method for controlling deformation of the deep and large foundation pit through partition unloading comprises the following steps of: increasing a temporary partition wall, and dividing the deep and large foundation pit into a large foundation pit far away from a protection object and a narrow foundation pit close to the protection object for performing partition unloading in two areas, so that the deep and large foundation pit is relatively far away from the protection object; and digging the large foundation pit far away from the protection object, finishing pouring of a bottom plate of the large foundation pit through rapid construction, and controlling bulge inside the pit and settlement outside the pit due to the large pit unloading. Meanwhile, because the pit close to the protection object is the narrow foundation pit, and resilience in the pit and deep soil body slippage are small, the lateral deformation of the narrow foundation pit is controlled in an emphasized mode in the process of digging the narrow foundation pit, so that the protection object close to the narrow foundation pit is controlled and protected; and therefore, the aims of reducing and controlling the influence of excavation of the large and deep foundation pit on the deformation of the protection object are achieved.

Description

technical field [0001] The invention relates to the field of deep and large foundation pit construction, in particular to a system and method for controlling the deformation of deep and large foundation pits by unloading in zones. Background technique [0002] With the rapid development of Shanghai's urban construction, the shortage of land resources in the city center, the congestion of traffic, the high population density and other factors restrict the sustainable development of the city. And vigorous development and utilization of underground space is an important aspect of building a conservation-oriented city and taking the road of sustainable development. While vigorously developing the urban underground space, it also encountered a large number of deep and large foundation pit projects. These deep foundation pits located in the city center are surrounded by various underground pipelines, and are close to various buildings and subway tunnels and other facilities. Due...

AI Technical Summary

Problems solved by technology

However, because some deep foundation pits are adjacent to important protected buildings and subway tunnels, the excavation of foundation pits is too deep and too close to the protected object, and the allowable deformation of the protected object is extremely strict

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