基于两阶段法的堆载对公路桥梁桩基础影响分析_冯昌明.pdf

35 2 Vol.35 Supp.2 2014 10 Rock and Soil Mechanics Oct. 2014 (2014)2 0528 07 1,2 1,2 3 4 1. 200092 2. 200092 3. 1000284. 430073 Mindlin TU 473 A Two-stage analysis of responses of bridge pile foundations to adjacent surcharge 1,2 1,2 3 4 FENG Chang-ming MU Lin-long SUN Zhi-wei WANG Yao-zhong (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. CNPC Southeast Asia Pipeline Co., Ltd., Beijing 100028, China; 4. PetroChina West-East Gas Pipeline Company, Wuhan 430073, China) Abstract: Based on the Boussiesq solution, a method for computing the distribution of the stress and the deformation in homogeneous soil with several different kinds of loads including rectangular loads and strip loads acting exclusively on the surface of a half elastic space is given by means of integration of the Boussiesq equations of a concentrated force acting on the surface. The integration is realized by numerical integration, the composite Simpson’s rule, with dividing the acting area of the distributed loads into numerous tiny rectangles. Meanwhile, the deformation of discrete pile elements, which derives from the finite difference analysis, is given with pile subjected to concentrated force or moment on the pile top. In the same