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| Pile jacking-in effects considering stress anisotropy of natural clay#br# |
| LI Lin1，2，LI Jingpei1，2，SUN Dean3，YUE Zhuwen1，2 |
(1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；
3. Department of Civil Engineering，Shanghai University，Shanghai 200072，China) |
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Abstract The Cam-clay model modified for the K0-consolidated anisotropic clay，which can properly describe the initial stress anisotropy and stress-induced anisotropy of the natural saturated clay，was used to derive a theoretical solution to the cavity expansion due to pile jacking-in. The method of calculating the resistance of pile sinking is presented. To verify the validity of the theoretical solution，a centrifuge test of pile jacking-in was carried out in K0 consolidated clay. The soil stress，pore water pressure and pile-sinking resistance were studied in detail by comparing the measured data with the predicted data. The results show that the proposed mechanical model reflects the pile jacking-in effects properly due to the intrinsic properties of the natural clay being sufficiently considered. The proposed solution provides a theoretical base for pile construction and bearing capacity determination.
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2016, Vol. 35 
