摘要
采用桩土界面荷载传递双曲线模型,对分层土中单桩进行了分析,用有限差分法进行求解,提出了单桩竖向位移内力非线性简化分析方法。考虑了群桩中的"被动桩"与周围土体的相互"遮拦效应",并将其应用到刚性承台下受荷群桩的分析中。由于考虑了土体的成层性和桩土相互作用的非线性特性,计算模型更好地反映了土体的实际性状。计算结果与试验结果进行了对比分析,验证了本文方法的正确性,可应用于实际工程问题的分析。
According to the load transfer hyperbolic model of pile - soil interface, the single pile in layered soil is analyzed and solved with finite differential method, a simplified nonlinear method for analysis of settlement and internal force of single pile is presented. Considering the sheltering effect between passive piles and soil, the coefficient of pile - pile interaction is calculated. Taking into account the nonhomogeneity of soil and nonlinear interaction between piles and soils, the theoretical model agrees well with the real performance of soil. Comparisons are made between the results obtained from the method and field tests, and the feasibility of the proposed model for the analysis of pile groups is proved.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第A02期1549-1553,共5页
Chinese Journal of Underground Space and Engineering
基金
国家高技术研究发展计划(2007AA11Z117)
关键词
成层土
群桩
非线性
双曲线
layered soil
pile group
nonlinearity
hyperbola
