Abstract：Research purposes: Additional stress is a critical parameter in the subgrade settlement analysis of foundation，and it will be quite different with different calculation methods． The purpose of this research is to understand the distribution of foundation stress of the subgrade with piled raft foundation by doing the on － site testing．
Research conclusions: ( 1) The matter that the actual additional stress of the subgrade with piled raft foundation is less than the calculated value is one of the causes for the error of the settlement calculation． ( 2) There is a critical pile length in foundation reinforcement for the subgrade with piled raft foundation． ( 3) It is reasonable to calculate the self － weight stress of the soil below the groundwater level by using floating density．
崔维孝 冷景岩 陈晶晶. 桩筏基础路基地基应力测试研究[J]. 铁道工程学报, 2012, 29(4): 32-36.
CUI Wei － xiao，LENG Jing － yan，CHEN Jing － jing. Research on Test of Foundation Stress for the Subgrade with Piled Raft Foundation. 铁道工程学报, 2012, 29(4): 32-36.
Ding Jihui，Ma Yupeng，Yu Yunfei． Numerical Analysis on Foundation Settlement Based on Mindlin Stress Equation ［J］． Water Resources and Hydropower Engineering， 2002( 5) : 8 － 11．
［3］ 龚晓南． 地基处理手册［K］． 北京: 中国建筑工业出版社， 2008．
Gong Xiaonan． Foundation Treatment Manual［M］． Beijing: China Building Industry Press， 2008．
［4］ JGJ 94—2008，建筑桩基技术规范［S］．
JGJ 94—2008，Technical Code for Building Pile Foundations［S］．
Cui Weixiao． Research on the Settlement Characteristics of Subgrade with Piled Raft Foundation under Conditions of Thick Compressible Foundation ［J］． Journal of Railway Engineering Society，2009 ( 4) : 9 － 12．
2012, Vol. 29 
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