花岗岩残积土复合桩基设计及应用

The Design and Application of Composite Pile Foundation in Granite Residual Soil

对于端承桩为复合桩基基桩的情况,为发挥复合桩基中花岗岩残积土的承载作用,通过弱化基桩刚度的方法,实现端承桩与筏板下地基土的共同工作。本文对桩顶设置刚度调节装置的残积土复合桩基设计中的刚度调节、刚度变化时点及安全度进行分析,提出设计建议,供高层建筑基础工程设计参考。

In the case of composite pile foundation which the pile is ending bearing, in order to increase the bearing capacity of granitic residual soil and a chieve the co work of end bearing pile and soil under the raft foundation, a method of weakening the pile stiffness is adopted. In the design of an elastic supporting device was putted at the top of the pile of residual soil composite pile foundation, the stiffness adjustment, the change time of stiffness and the de gree of safety are analyzed. Some proposals are supported as references for the design of foundation of high rise buildings.