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| THE INFLUENCE OF WATER CONTENT ON UPLIFT ULTIMATE CAPACITY OF ENLARGED BASE PILES IN UNSATURATED SILT |
| KONG Linggang1，2，ZHANG Geqiang1，2，CHEN Renpeng1，2，CHEN Yunmin1，2，XING Yuelong3，YING Jianguo3 |
(1. Institute of Geotechnical Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；2. MOE key Laboratory of Soft Soils and Geoenvironmental Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；
3. Zhejiang Electric Power Design Institute，Hangzhou，Zhejiang 310000，China) |
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Abstract To evaluate the uplift behavior of enlarged base piles，a simplified numerical model for the piles in silt has been developed in this study and its calculated results are compared to the results of large-scale model tests. Agreement between the calculated results and the test results is excellent. A series of numerical analysis were then performed to investigate the effects of raining and ground water level on the uplift capacities of enlarged base piles with different depths. It is found that raining has a more significant influence on uplift capacities of the enlarged base piles with shallow embedment，while the variation of ground water level has a significant influence on the enlarged base piles with different depths.
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Received: 25 June 2010
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2011, Vol. 30 
