摘要
本文提出用塑性能量法来求柔性桩地基承载力的新方法。对不同破坏型式的单桩用塑性理论分别建立了相应的承载力计算式,进而提出碎石桩地基承载力的实用计算方法。最后通过对26个工程大量载荷试验结果与计算值的对比,给出了计算不同土质中的碎石桩地基承载力所需的能量参数d_cf值,可供设计参考。
A plastic energy method has been put forward to calculate bearing capacity of the foundation with stone columns.The calculating formulae of the bearing capacity for different typical collapsing types of single stone columns are established.Furthermore,a practical formula [R_(sc)~c]= 4a_sd_cf+[R_s],used for estimating bearing capacity of composite foundation is proposed.Comparing the experimental results of 26 practical projects with computed value,the energy parameters d_cf used in the abovementianed equation are given for different subsoils improved with stone column.
关键词
碎石桩
地基
承载力
foundation
bearing capacity
energy method
design paprameter/stone column
