Numerical Simulation of Time Effect of Single Pile Settlement of Site Foundation in 220 kV Substation
LI Xingyu
SHEN Chunyang
TAO Xiongwu
ZHANG Xuanzi
HU Xiaoping
SHU Yueshui
Abstract：Taking the single pile of the site foundation of a 220 kV substation in a certain area as the test object,the pile-soil system interaction model is constructed,and the relevant values are solved by using the wave analysis program of traveling wave decomposition,Laplace transform,wave analysis program and trapezoidal integration methods,to simulate the influence of pile-soil parameters,elastic modulus,subsoil thickness and creep variable on the time effect of the single pile settlement of site foundation in 220 kV substation under static load.The test results show that the pile-soil parameters have a great influence on the single pile settlement of site foundation in the 220 kV substation.When the soil around the single pile of the foundation is subjected to the static load force of the single pile top of the foundation,a certain amount of settlement will occur with the increase of time.When the shear wave velocity of the pile side soil is the maximum,the settlement of the single pile top will tend to be stable and the settlement will be the minimum in a short time.The internal friction angle is inversely proportional to the settlement of single pile.When the elastic modulus increases,the settlement of single pile top will decrease.The thickness of subsoil is inversely proportional to the time of settlement stabilization.The creep variable gradually decreases with the increase of the action time of self-weight stress.When the action time is 2000 d,the settlement of the pile top is the largest.
Keywords：220 kV substationSite foundationSingle pile settlementTime effectNumerical simulationStatic load
Publication Date：2024-03-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 149-156 )