Abstract：To provide a calculation method for the ultimate bearing capacity at the tip of a single rock-socketed pile in different stratum with karst cave. Firstly, a simplified calculation model was establishedab on the basis of bearing characteristics of a rock-socketed pile in Karst area. Secondly, the bearing mechanism at the tip of a rock-socketed pile in Karst area was analyzed and the calculation model of ultimate bearing capacity was built as well. Thirdly, average constraint stress at the tip of a rock-socketed pile in Karst area was solved by using the method of complex variable function, and therefore, the ultimate baring capacity at the tip of a rock-socketed pile in Karst area was obtained. Then, the influencing factors of ultimate bearing capacity at the tip of a rock-socketed pile in Karst area were analyzed, and the analysis results show that increasing the cavity radius, increasing the cavity depth or decreasing the distance from the pile tip to the center of cavity may increase the impact on ultimate bearing capacity at the tip of a rock-socketed pile in Karst area. At last, theoretical results based on an engineering example disclose that the proposed method can meet the requirements of practical projects. It is noteworthy that due to the assumptions, the validity of calculation results in this work is only applicable to the case that the distance between the cave and pile tip is larger than 3 times the pile diameter.
赵明华 徐卓君 肖尧 赵衡 胡倩. 基于平面应变模型的岩溶区嵌岩桩桩端极限承载力计算[J]. 土木工程学报, 2018, 51(2): 88-94.
Zhao Minghua Xu Zhuojun Xiao Yao Zhao Heng Hu Qian. Research on ultimate bearing capacity at the tip of a rock-socketed pile in Karst area based on plane strain model. 土木工程学报, 2018, 51(2): 88-94.
