受桩顶沉降量控制的嵌岩桩承载特性研究

Study on bearing characteristics of rock-socketed piles controlled by settlement of pile-top

岩质陡坡环境下的桩基需考虑桩顶沉降量对桩基承载特性的影响。推导了按桩顶沉降控制的嵌岩桩的控制微分方程,并建立了桩侧岩土体处于弹性阶段时桩顶极限荷载的求解方法。最后以一具体工程为依托,对该桩基按桩顶沉降量控制进行竖向承载力计算。结果表明依托工程的桩基的竖向承载力是满足要求的,研究结果验证了理论公式的可行性。

The influence of pile-top settlement on the bearing characteristics of pile foundation should be considered under rocky steep slope environment. In this paper,the differential equations of rock-socketed piles controlled by pile top settlement are derived,and the method for solving the ultimate load of pile tops when the rock mass of the pile side is in the elastic stage is established. Finally,based on a specific project,the vertical bearing capacity of the pile foundation is computed according to the settlement of the pile top. The results show that the vertical bearing capacity of the pile foundation meets engineering needs. The research results verify the feasibility of the theoretical formula.