Surface Deformation Caused by Confined Water Precipitation and Its Influencing Factors
CHEN Jun
DUAN Aihua
SHI Yao
GUO Huiqian
Abstract：Foundation pit dewatering has an important impact on foundation pit construction,but it has a negative impact on the surrounding environment.Taking the pumping test of confined water in foundation pit engineering as an example,this paper uses finite element analysis software to establish a three-dimensional dewatering model to calculate seepage and its coupling with soil stress and strain,and analyzes the distribution law of surface horizontal displacement and settlement during pumping.The numerical simulation results show that the smaller the elastic modulus of confined water soil layer,the greater the influence on surface deformation,and with the increase of elastic modulus,the degree of influence on surface settlement gradually decreases;Surface deformation is greatly influenced by permeability coefficient,and the effective influence range of surface deformation also increases with the increase of permeability coefficient.Poisson′s ratio has little effect on surface deformation;The surface deformation increases linearly with the increase of single well water output.With the increase of precipitation duration,the surface deformation increases;Water yield of single well and elastic modulus of soil layer not only affect the horizontal displacement and settlement of the surface,but also affect the spatial distribution of the horizontal displacement and settlement of the surface.
Keywords：soil layer deformationconfined aquifersoil layer parameterscoupling model
Publication Date：2025-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 78-82 )