桩锚支护结构计算模型中支点弹性系数的时变性分析  

Time-variation analysis for the elastic coefficient of fulcrum in the calculation model of pile-anchor retaining structure(PARS)

作　　者：张忠民 叶永峰[2] 郭院成[2] 韩伟[2] 

机构地区：[1]新郑市建设工程监理公司,河南新郑451100 [2]郑州大学土木工程学院,河南郑州450002

出　　处：《河南科学》2005年第5期695-698,共4页Henan Science

基　　金：河南省自然科学基金资助项目(0211063200)

摘　　要：根据桩锚支护结构的受力和变形特点,研究分析了桩锚支护结构计算模型中支点弹性刚度系数的动态时变性;讨论了随桩内侧坑底土的持续反弹以及不同工况下随着基坑开挖深度的逐渐增大,进而导致弹性支撑刚度系数的减小的变化规律.为桩锚支护结构施工进程中受力变形的设计计算和过程控制提供了动态计算模型.In this paper, based on the characteristics of force and deformation of PARS, the time-variation of the elastic coefficient of fulcrum in the calculation model of PARS is analyzed and studied; and the lessening of rigidity coefficient of elastic fulcrum, which is caused by the continual bottom soil resilience beside the piles and the increase of excavation depths during different steps, is discussed. What we have done here provides developing calculation model for the force-deformation calculation and process control of PARS during construction.

关 键 词：桩锚支护 计算模型 弹性支撑刚度系数 

分 类 号：TU91[建筑科学—建筑理论]