一种振冲碎石桩复合地基的沉降计算方法  

Settlement calculation method of a kind of vibro-replacement stone column composite foundation

作　　者：杨杰[1] 王清[1] 王剑平[2] 牛岑岑[1] 

机构地区：[1]吉林大学建设工程学院,长春130026 [2]南京水利科学研究院,南京210000

出　　处：《世界地质》2011年第1期85-89,共5页World Geology

基　　金：国家自然科学基金项目(40372122;40672180);国家自然科学基金国际合作项目(40911120044);成都理工大学地质灾害防治与地质环境保护国家专业实验室开放基金(GZ2004-08)联合资助

摘　　要：对振冲碎石桩复合地基桩体和桩间土的变形与应力--应变关系进行研究。假设在荷载作用下,复合地基中桩体变形均匀,桩-土变形协调,推导出振冲碎石桩复合地基沉降计算公式为:ABk2εh3v+2ABhkεh2v+A(D2+B)h2hv=nh2pD2;利用牛顿迭代法解一元三次方程,可求得复合地基沉降。将本方法应用于沿海某大型储油罐工程,计算振冲碎石桩复合地基总沉降量为171.5 mm,实测沉降量为162.2 mm,计算结果与实测结果基本吻合,表明该方法有一定的实用性。The deformation and stress-strain relations of piles and soils of vibro-replacement stone column composite foundation have been studied.Based on the assumption under loading action,the deformation of pile was uniformly and deformation of pile-soil was harmoniously,the settlement calculation formula of vibro-replacement stone column composite foundation was deduced：ABk2εh3v＋2ABhkεh2v＋A（D2＋B）h2hv=nh2pD2.The settlement of composite foundation can be obtained using Newyon iteration method to solve simple cubic equation.Applied this method in a large oil storage tank engineering,the settlement calculation result of vibro-replacement stone column composite foundation was 171.5 mm,approximately agreed with the measured settlment（162.2 mm）,indicating this method had certain practicality.

关 键 词：振冲碎石桩 复合地基 变形 应力--应变 沉降 

分 类 号：TU433[建筑科学—岩土工程]