(浙江中大房地产集团有限公司，杭州 310003)
［提要］假定桩竖向受荷达到极限承载力时桩周的土体破坏是桩土界面土体受剪破坏，土体抗剪强度参数即为桩极限侧阻力标准值，可利用库仑定律进行计算。利用文中模式计算的桩侧极限承载力值与静载试验结果吻合良好，解释了基桩静载试验中桩侧极限承载力远大于根据工程勘测报告参数计算的桩侧极限承载力现象。
［关键词］钻孔灌注桩；侧壁摩阻力；受剪破坏；库仑定律
Ultimate Shaft Friction Calculation of Bored Castinsitu Pile/Dai Jinlin(Zhongda Real Estate Group Co.,Ltd.,Hangzhou 310003,China)
Abstract:Based on the assumption that the failure of the soil around pile is caused by the shear failure happened on the interface between the pile and soil when the ultimate vertical load is applied, and the ultimate value of lateral friction along the shaft is regarded as soil shear strength, the scenario Coulomb"s law can be used. The calculated results of the ultimate shaft resistance using the model derived are well consistent with the data of the static pile loading test, which could give a good explaination why the ultimate lateral resistance of the pile from static pile loading test is larger than the calculation from survey parameters.
Keywords:bored pile; shaft friction; shear failure; Coulomb"s law