Method and system for analyzing pore pressure of soil body around single-layer soil foundation pit under water level fluctuation

Abstract

The invention discloses a method and system for analyzing the pore pressure of soil around a single-layer soil foundation pit under water level fluctuation, and the method comprises the steps: taking a half section of the foundation pit according to symmetry, carrying out the calculation and analysis, and building a two-dimensional geometric model of the foundation pit in a single-layer soil layer supported by a suspension type impermeable retaining wall under the condition of underground water level fluctuation; a foundation pit retaining wall and a wall bottom horizontal line are used as boundary lines, a seepage field around a foundation pit is divided into three regular areas, and control balance equations in the areas are established on the basis of the seepage theory; the established foundation pit two-dimensional geometric model in the single-layer soil layer is combined with foundation pit two-dimensional seepage basic assumption, boundary conditions of all subdomains of a foundation pit seepage field are obtained, and the pore pressure of all the areas is expressed in a series sum mode through a variable separation method; and establishing a matrix equation set by utilizing continuous conditions among the regions, solving to obtain a constant term and a series term in the pore pressure analytical expression, and substituting the constant term and the series term into the pore pressure expression to obtain a pore pressure complete analytical solution of the soil body around the foundation pit. Certain engineering reference is provided for foundation pit design.

Description

technical field [0001] The invention relates to the technical field of foundation pit analysis for civil engineering, and particularly discloses a method and system for analyzing soil pore pressure around a single-layer soil foundation pit under the water level fluctuation supported by a suspended impervious retaining wall under the condition of groundwater level fluctuation. Background technique [0002] With the development of the times, the construction of various underground projects has prompted the generation of a large number of deep foundation pit projects. In order to make full use of the abundant water resources such as the ocean and vigorously develop coastal urban agglomerations, many deep foundation pit projects built in coastal and riverside areas, There are a series of new problems that need to be solved urgently in the construction. When there is a water level difference between the inside and outside of the foundation pit, groundwater seepage will occur. Gro...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and system for analyzing the pore pressure of soil around a single-layer soil foundation pit under water level fluctuations, aiming to solve the technology that rarely studies the related problems of foundation pit seepage under the condition of groundwater level fluctuations in the prior art question

Images