桩顶竖向荷载作用下桩土响应数值分析.pdf

42 2 () Vol.42 No.2 2011 2 Journal of Central South University (Science and Technology) Feb. 2011 1 2 1 (1. 413000 2. 410083) TU457 A 1672−7207(2011)02−0508−06 Numerical analysis of pile soil interaction under pile head vertical load 1 2 1 LIU Zi-you , LIN Hang , JIANG Xue-liang (1. School of Civil Engineering, Hunan University of City, Yiyang 413000, China; 2. School of Resources and Safety Engineering, Central South University, Changsha 410083, China) Abstract: In order to study the interaction mechanism of pile soil, the calculation of the pile soil system was built by the numerical method, the skin friction and axial stress distribution of pile were analyzed as well as the variation discipline of neutral point position and the soil displacement situation. The results show that the negative skin friction of pile first increases then decreases, and finally changes to the positive skin friction. With the increase of pile head load, the pile negative skin friction decreases gradually, and the neutral point position moves higher. The axial stress of pile first increases and then decreases. Due to the effect of pile skin friction, the settlement of the ground surface soil is influenced by the