Process method for rectifying deviation of open caisson by jacking balance of jack

Abstract

The invention provides a process method for rectifying the deviation of an open caisson by the jacking balance of jack, which comprises the following steps: knocking pre-stressed tubular piles into the four corners of a concrete box at the short-direction side as stress points; preventing the lower end of the concrete box from sinking in digging by an unloading device which comprises a pile cap, a steel truss, hydraulic jacks and a replaceable component; digging the subsoil at the high end of the concrete box to cause the lower foundation of the concrete box to have new inverse and non-uniform sinking; slowly sinking the concrete box to a designed elevation by adjusting the jack stroke and the replaceable component of the unloading device step by step; and replacing all the jacks by the replaceable component. The method can effectively solve the problem of non-uniform sinking of an open caisson in rectifying the deviation of the open caisson, and dynamically control the sinking of open caissons. The method is especially suitable for rectifying the deviation of open caissons in flow plastic muddy soil.

Description

technical field [0001] The invention relates to a technology for controlling the uneven settlement deviation of an eccentric caisson in a large pump house in the state of flowing plastic silt, in particular to a method for correcting the deviation of the caisson and controlling the subsidence by using a jack to lift the balance. Background technique [0002] At present, there are many deviation correction methods used in the construction process of caissons in China, such as partial excavation deviation correction method, large-angle tilt deviation correction and asymmetric soil taking deviation correction, supplemented by filling and digging outside the well and air curtain auxiliary correction, etc. method. Since the project is located on the coast and the geology is in the state of fluid plastic silt, the caisson is very prone to uneven deviation during the sinking process. When it is necessary to ensure that the plane position of the caisson does not shift, the above met...

AI Technical Summary

Problems solved by technology

Since the project is located on the coast and the geology is in the state of fluid plastic silt, the caisson is very prone to uneven deviation during the sinking process. When it is necessary to ensure that the plane position of the caisson does not shift, the above methods are not suitable for solving the problem. The upper and lower displacement deviation of this caisson

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