On composite foundation with different vertical reinforcing elements under vertical loading:a physical model testing study  

作　　者：Xian-zhi WANG Jun-jie ZHENG Jian-hua YIN 

机构地区：[1]Department of Water Resources, Guangdong Technical College of Water Resources and Electric Engineering, Guangzhou 510635, China [2]School of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074, China [3]Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2010年第2期80-87,共8页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No.50478090) supported by the National Natural Science Foundation of China

摘　　要：Aphysical model facility was designed, built, and setup for conducting model tests on a composite foundation in a soil ground. The model tests were carried out on a composite foundation with different combinations of vertical reinforcement elements in the same soil ground. Via the analysis of the collected data the characteristics of the composite foundation with different reinforcing elements were obtained, including the characteristics of load-settlement curves, column stresses, stresses of the intercolumn soil, pile-soil stress ratio, and load-sharing ratios of columns and soil. Results from the model tests reveal the mechanism of a composite foundation with different reinforcing elements quantitatively. It is concluded that both a composite foundation with a combination of steel pipe pile and sand column and that with a combination of concrete pile and lime column have a higher bearing capacity than the composite foundation with only sand columns with the same conditions of soil ground and loading. A composite foundation with lime column and sand column embodies no much better performance than that with sand colunms only.A physical model facility was designed,built,and setup for conducting model tests on a composite foundation in a soil ground.The model tests were carried out on a composite foundation with different combinations of vertical reinforcement elements in the same soil ground.Via the analysis of the collected data the characteristics of the composite foundation with different reinforcing elements were obtained,including the characteristics of load-settlement curves,column stresses,stresses of the inter-column soil,pile-soil stress ratio,and load-sharing ratios of columns and soil.Results from the model tests reveal the mechanism of a composite foundation with different reinforcing elements quantitatively.It is concluded that both a composite foundation with a combination of steel pipe pile and sand column and that with a combination of concrete pile and lime column have a higher bearing capacity than the composite foundation with only sand columns with the same conditions of soil ground and loading.A composite foundation with lime column and sand column embodies no much better performance than that with sand columns only.

关 键 词：Steel pipe pile Concrete pile Lime column Sand column Composite foundation Model test Pile-soil stress ratio 

分 类 号：TU472.36[建筑科学—结构工程] TV61[建筑科学—土工工程]