现浇混凝土薄壁管桩复合地基桩土应力比影响因素分析  

Analysis of factors influencing stress ratio between pile and soil of composite foundation with cast-in-situ concrete thin-wall pipes

作　　者：刘汉龙[1] 张波[1] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室

出　　处：《岩土力学》2008年第8期2077-2080,2086,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助(No.50679017);江苏省“六大人才高峰”基金资助项目(No.50528512)

摘　　要：桩土应力比是复合地基设计计算中一个重要参数。基于盐―通高速公路单桩复合地基静载试验,通过有限元模拟,研究了褥垫层模量和厚度、桩体模量、桩长、基础刚度等影响因素对现浇混凝土薄壁管桩复合地基桩土应力比的影响。结果表明所建立的模型是合理的。褥垫层模量增大或厚度减小导致桩土应力比增大,桩体模量、桩长和基础刚度的增加可使桩土应力比增加。The stress ratio between pile and soil is a key parameter for the design and calculation of composite foundations.Based on single pile composite foundation static load tests of Yan-Tong Expressway,the influences of cushion modulus and thickness,pile modulus,pile length,base stiffness etc.on the stress ratio of pile-soil are analyzed by using the finite element analysis.The results show that the model built is reasonable.The stress ratio of pile-soil increases with the cushion modulus increase or thickness decrease,and with the increases of pile modulus,pile length,base stiffness.

关 键 词：现浇混凝土薄壁管桩(PCC) 复合地基 数值模拟 桩土应力比 

分 类 号：TU473[建筑科学—结构工程]