Model testing study on composite foundation of
cement-soil pile under cyclic loading |
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| Authors: | BAI Shun-guo HOU Yong-feng ZHANG Hong-ru LI Zhi-qiang |
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| Institution: | 1. College of Urban and Rural Conatruction, Agricultural University of Hebei, Baoding 071001, China;
2. College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | Model tests on composite foundation of cement-soil pile under cyclic loading were conducted. The vertical additional pressure, stress ratio of pile and soil, the pore water pressure, and the settlement of composite foundation of cement-soil pile, etc. were discussed. The test results show that (1) the saturated soft foundation improved with cement-soil piles occurred redistribution of stresses; (2) the effects of cyclic stress ratio, number of loading cycle and replacement ratio on the stress ratio of pile to soil of composite foundation were remarkable; (3) the saturated soft foundation improved with cement-soil piles decreased the pore water pressure value and the settlement of back work; (4) the vertical deformation of the top of piles and pile-surrounding soil is not coordinative. The permanent settlement of the pile top piles is less than that of pile-surrounding soil; and this tendency is more remarkable with increasing number of loading cycle. |
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| Keywords: | cyclic loading model test composite foundation vertical additional pressure stress ratio of pile to soil pore water pressure |
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