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Model testing study on composite foundation of cement-soil pile under cyclic loading
Author(s): BAI Shun-guo College of Urban and Rural Conatruction, Agricultural University of Hebei, Baoding 071001, China HOU Yong-feng ZHANG Hong-ru LI Zhi-qiang College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Pages: 1017-
1020
Year: 2006
Issue:
S2
Journal: Rock and Soil Mechanics
Keyword: cyclic loading; model test; composite foundation; vertical additional pressure; stress ratio of pile to soil; pore water pressure;
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.
Citations
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