中文摘要：

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。

英文摘要：

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.