Force analysis of pile foundation in rock slope based on upper-bound theorem of limit
- 194 Downloads
Based on the characteristic that the potential sliding surfaces of rock slope are commonly in the shape of either line or fold line, analysis thought of conventional pile foundation in the flat ground under complex load condition was applied and the upper-bound theorem of limit analysis was used to compute thrust of rock layers with all possible distribution shapes. The interaction of slope and pile was considered design load in terms of slope thrust, and the finite difference method was derived to calculate inner-force and displacement of bridge pile foundation in rock slope under complex load condition. The result of example shows that the distribution model of slope thrust has certain impact on displacement and inner-force of bridge pile foundation. The maximum displacement growth rate reaches 54% and the maximum moment and shear growth rates reach only 15% and 20%, respectively, but the trends of inner-force and displacement of bridge pile foundation are basically the same as those of the conventional pile foundation in the flat ground. When the piles bear the same level lateral thrust, the distribution shapes of slope thrust have different influence on inner-force of pile foundation, especially the rectangle distribution, and the triangle thrust has the smallest displacement and inner-force of pile foundation.
Key wordspile foundation rock slope inner-force calculation finite difference method upper-bound theorem of limit analysis
Unable to display preview. Download preview PDF.
- MCCULLOUGH N J, DICKENSON S E. The behavior of piles in sloping rock fill at marginal wharves [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 16(1): 1–10.Google Scholar
- WU Hong-li. Study on calculation method of laterally loaded pile [J]. China Civil Engineering Journal, 1995, 28(2): 20–28. (in Chinese)Google Scholar
- DAI Zi-hang, PENG Zhen-bing. Finite difference method based on “m-k” method for calculation of internal forces of a whole stabilizing pile [J]. Rock and Soil Mechanics, 2002, 23(3): 321–324. (in Chinese)Google Scholar
- ZHAO Ming-hua, HOU Yun-qiu, CAO Xi-ren. Study on the behavior of inclinedly loading piles [J]. Journal of Hunan University, 1997, 24(2): 98–102. (in Chinese)Google Scholar
- HOU Yun-qiu, ZHAO Ming-hua, CAO Xi-ren. Study on bearing capacity of inclined loading piles[J]. Central South Highway Engineering, 1998(1): 39–42. (in Chinese)Google Scholar
- XU Liang-de, YIN Dao-cheng, LIU Hui-ming. Resistance distribution before pile when landslide body is clay [M]. Beijing: China Railway Press, 1990: 92–99.(in Chinese)Google Scholar
- DAI Zi-hang. Study on distribution laws of landside-thrust and resistance of sliding mass acting on anti-slide piles [J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(4): 517–521. (in Chinese)Google Scholar
- WAISH J B. Effect of pore pressure and confining pressure on fracture permeability [J]. Int J Rock Mech Min Sci Geomech Abstr, 1991, 28(5): 429–435.Google Scholar
- WANG Zai-quan. Stability research of complex slope engineering system [M]. Xuzhou: China University of Mining and Technology Press, 2000. (in Chinese)Google Scholar
- CHEN Wei-fa, LIU Xi-la. Limit analysis in soil mechanics [M]. Amsterdam: Elsevier Science, 1990.Google Scholar