摘要
通过对嵌岩桩桩端岩层破坏机理的分析,建立了桩端持力岩层抗冲切的计算模型,并在此基础上导出了一套能考虑冲切锥体自重及岩层剪、拉应力的岩溶及采空区桩端持力岩层安全厚度计算公式.然后,通过对公式计算结果的比较分析,提出了便于应用,且经济合理、安全可靠的桩端持力岩层安全厚度计算公式,并对该公式的计算参数及其合理安全系数的选取等进行了深入讨论.图8,参12.
Thorough analyzing the failure mechanism of the terrane at the end of rock-socketed piles, a new method for calculating the safe terrane thickness of punching-shear resistance is established. Sever computations formula ,which can consider the effections of shear stress, tensile stress, the weight of punching-shear cone in karst and mined-out region on the safe terrane thickness, is imposed. By the compares and the analysis of the computational results, two concise formula, which are easy to applied in the engineering, is formed according to the economical and safety consideration. In the end, the determination of computational parameters and the computation method of safety factor of punching-shear resistance are discussed. 8figs. ,12refs.
出处
《湘潭矿业学院学报》
2003年第4期41-45,共5页
Journal of Xiangtan Mining Institute
基金
湖南省交通厅资助项目(编号:200115)
关键词
嵌岩桩
冲切
桩基础
安全厚度
rock-socketed piles
punching-shear
pile foundation
safe thickness
