碎石桩复合地基复合模量极限值分析.pdf

40 6 () Vol.40 No.6 2009 12 Journal of Central South University (Science and Technology) Dec. 2009 ( 410082) 1.1~1.4 TU 443 A 1672−7207(2009)06−1718−06 Limit value of composite modulus of gravel pile composite foundation ZHAO Ming-hua, SUN Jian-bing, ZHANG Yong-jie, ZHANG Ling (Geotechnical Engineering Institute, Hunan University, Changsha 410082, China) Abstract: Based on the fact that the composite modulus of composite foundation is a key parameter in settlement calculations, and that it is hard to obtain precise solutions that are completely conformed to reality, the composite modulus of gravel pile composite foundation and its disadvantages were calculated based on the discussion of the existing method, the calculation formula of the limit value of the composite modulus was obtained, the minimum potential energy principle and the principle of minimum complementary energy were applied, and the gravel pile composite foundation was treated as a composite material composed of pile and soil in this process to avoid the analysis of complex interaction between piles and soil. Moreover, several factors which affect the limit value of the composite modulus such as compression modulus of pile and soil, Poisons’s ratio of s