基于极限平衡理论的楔形桩承载力计算方法

Calculation Method of Bearing Capacity of Tapered Pile Based on Limit Equilibrium Theory

首先根据楔形桩的受力特性,提出了楔形桩单桩破坏模式,然后从极限平衡理论出发,利用库仑土压力的推导思路,推导得到了该破坏模式下的楔形桩承载力计算方法;将数值分析的结果与自编的单桩承载力计算程序计算得到的结果进行对比分析,验证了该方法的合理性。结果表明:其他参数不变时,在一定范围内增大楔形桩的锥角,可显著提高楔形桩的极限承载力;当外摩擦角较大时,粗糙的桩侧面也可以提高楔形桩的承载力;楔形桩尺寸也是影响单桩承载力的重要参数;该方法在工程实际中有着较强的适用性。

Failure mode of single pile was derived based on the mechanical behavior of tapered pile. On the basis of the Coulomb＇s earth pressure theory, a new calculating method of bearing capacity of tapered theory. Then, thro using se bearing pile under this failure mode was developed by ugh the comparison of numerical analysis results made program, the rationality of this method was proved. capacity of tapered certain extent. Rough pile the external friction angle influence on the bearing engineering practice. utilizing limit equilib with results ohtainde It shows that the ulti rlum d by mate pile increases significantly with the increase of cone angle within a side is also used to increase the bearing capacity of tapered pile when is larger correspon capacity. It seems dingly. The size of tapered pile has important that this new method has good feasibility in