Construction method for compensating foundation pit deformation by using hydraulic side expansion steel sheet piles

Abstract

The invention belongs to the technical field of civil engineering, and particularly relates to a construction method for compensating foundation pit deformation by using a hydraulic side expansion steel sheet pile. The method is particularly suitable for being used for controlling the deformation of surrounding environment of foundation pit engineering so as to protect important buildings and facilities. A main device consists of a hollow steel sheet pile, an adjusting pipe and a water supply and drainage pipe, wherein the cross section of the hollow steel sheet pile is in a flat shape, and water can be injected into the hollow steel sheet pile; and the height of a water head can be increased through the adjusting pipe, great water pressure is generated, and the hollow steel sheet pile laterally expands under the great water pressure to compensate the deformation of the foundation pit engineering construction. The construction method provided by the invention has the advantages that the deformation of the foundation pit engineering can be effectively compensated; real-time adjustment can be achieved in combination with deformation monitoring; the device can be recycled to be repeatedly used; the arrangement mode is flexible; and the construction operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a construction method for compensating deformation of foundation pits by using hydraulic side expansion steel sheet piles. Background technique [0002] During the excavation of deep foundation pits, two types of deformation need to be controlled, namely, the deformation of the foundation pit support structure itself and the deformation of the surrounding protected objects caused by the excavation of the foundation pit. The surrounding protected objects include adjacent buildings, municipal pipelines, roads, etc. Especially in the process of foundation pit construction in soft soil areas, the requirements for the deformation control of the surrounding environment are even higher than the requirements for the deformation control of the foundation pit itself. Therefore, in engineering design and construction, on the basis of ensuring the safety of the foundati...

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Problems solved by technology

Therefore, in engineering design and construction, on the basis of ensuring the safety of the foundation pit itself, more reinforcement measures are still needed to control the deformation of the surrounding environment. Generally, strengthening and reinforcement measures indirectly control the deformation of the surrounding environment by controlling the deformation of the deep foundation pit itself. Deformation, the main measures are to strengthen the rigidity of the enclosure structure of the foundation pit, increase the rigidity of the soil, and adopt prestressed servo support measures. There are also measures such as isolation piles and reinforcement of the protected object to control the deformation of the protected object, but the existing measures are all Reducing the deformation of the protected object by strengthening the structural resistance can only reduce but not eliminate the deformation of the soil, and the effect of controlling the deformation of the surrounding environment is not ideal, and the construction cost is high

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