3D FEM analysis of deformation behavior of riverside deep excavation using the combination of bottom-up and top-down method
The foundation pit project of the North Bund through and comprehensive transformation and upgrading project is adjacent to the Huangpu River.There are complex environmental conditions such as historical protection buildings and flood control walls in the range of double excavation depth.The design scheme of the combination of zoning and reverse construction is adopted,and the implementation of the complex deep foundation pit near the river is successfully realized.Using the finite element software Plaxis3D,a three-dimensional finite element model of the interaction between soil and structure is established.Combined with the HS-Small model which can reveal the small strain characteristics of soil,the whole process of the foundation pit along the river is simulated and analyzed.By comparing the measured and numerical results of the project,the deformation law of the retaining structure of the foundation pit adjacent to the river,the deformation of the surrounding soil,the unbalanced lateral pressure behind the retaining wall and the influence on the adjacent historical buildings are analyzed.The results show that the 3D FEM analysis results are in good agreement with the measured data,which indicates that the calculation results can provide a basis for the design of the foundation pit enclosure near the river.
combination of bottom-up and top-down methodriversidedeep excavationdeformation behavior3D FEM
NETL
NSTL
万方数据
