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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2010, Vol. 11 Issue (2): 80-87    DOI: 10.1631/jzus.A0900252
Civil Engineering     
On composite foundation with different vertical reinforcing elements under vertical loading: a physical model testing study
Xian-zhi WANG, Jun-jie ZHENG, Jian-hua YIN
Department of Water Resources, Guangdong Technical College of Water Resources and Electric Engineering, Guangzhou 510635, China; School of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074, China; Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China
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Abstract  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.

Key words： Steel pipe pile      Concrete pile      Lime column      Sand column      Composite foundation      Model test      Pile-soil stress ratio     
Received: 29 April 2009      Published: 01 January 2010
CLC:  TU473  
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Xian-zhi WANG, Jun-jie ZHENG, Jian-hua YIN. On composite foundation with different vertical reinforcing elements under vertical loading: a physical model testing study. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2010, 11(2): 80-87.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0900252     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2010/V11/I2/80

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