Numerical analysis of side resistance of composite foundation with X-section cast-in-place concrete piles under rigid load
Lü Ya-ru12, DING Xuan-ming13, LIU Han-long12, Charles W. W. Ng4
1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing 210098, China; 4. Dept. of Civ. Engrg., Hong Kong Univ. of Sci. and Technol., Hong Kong 999077, China
Abstract：The bearing capacity of X-section cast-in-place concrete pile (XCC pile), a special cross-section pile, is significantly influenced by side resistance. The single-piled composite foundation including XCC pile and circular pile is simulated by means of the finite element program ABAQUS. The side resistance and side bearing capacity are compared between XCC pile and circular pile. The distribution of side resistance of XCC pile is analyzed via cross-section plan and depth. The results indicate that both the side resistance and the side bearing capacity for XCC pile are better than those of circular pile, and that the side bearing capacity of XCC pile is significantly larger than that of circular pile at the relative depth of 0.9. At the cross-section plan, because of the soil arching, the side resistance of convex arc is about 1.5 to 3 times as large as that of concave arc for XCC pile. The ratio of the side resistance for convex arc to that of concave arc increases with the relative depth. The results are available for the design of XCC pile.
吕亚茹, 丁选明, 刘汉龙, 吴宏伟. 刚性荷载下现浇X形桩复合地基桩侧摩阻力数值分析[J]. 岩土工程学报, 2012, 34(11): 2134-2140.
Lü Ya-ru, DING Xuan-ming, LIU Han-long, Charles W. W. Ng. Numerical analysis of side resistance of composite foundation with X-section cast-in-place concrete piles under rigid load. Chinese J. Geot. Eng., 2012, 34(11): 2134-2140.
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