摘要
将平面圆孔扩张理论推广到空间轴对称条件,改进了沉桩引起的位移解析解;考虑土体的弹塑性和挤土引起的土体性质的变化,利用有限元法对沉桩进行了分析计算;对沉桩进行了离心模型试验.研究结果表明,沉桩挤土效应的求解应考虑空间轴对称条件,沉桩引起的挤土效应将影响桩基础的计算结果,解析解较有限元结果更接近试验值.
The cavity expansion theory used for plane problems is extended to the spatial axisymmetric condition to improve the analytical solution of soil displacement induced by pilesinking. The FEM is used for calculation of the soil displacement with consideration of the elastoplastic behavior of soil and variation of soil characteristics induced by soil squeezing, and centrifugal model tests are performed for pilesinking. Research shows that in solution of pipesinking induced soil squeezing effect, the spatial axisymmetric condition should be considered, that the soil squeezing effect will influence the calculated results of pile foundations, and that the analytical solution is closer to the data measured from centrifugal model tests than that calculated with the FEM.
出处
《河海大学学报(自然科学版)》
CAS
CSCD
北大核心
2003年第4期415-418,共4页
Journal of Hohai University(Natural Sciences)
关键词
圆孔扩张理论
土体位移
解析解
有限元
离心模型试验
沉桩
cavity expansion theory
soil displacement
analytical solution
finite element method
centrifugal model test