基于上限定理的抗滑群桩设计理论研究  

A new design method of ant:-slide group piles based on upper limite theorem

作　　者：何思明[1,2] 罗渝[1,2] 

机构地区：[1]中国科学院山地灾害与地表过程重点实验室,四川成都610041 [2]中国科学院-水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《自然灾害学报》2010年第5期7-12,共6页Journal of Natural Disasters

基　　金：国家重点基础研究发展计划资助项目(2008CB425802);国家自然科学基金项目(40872181;40572158);交通部西部科技项目(2008-318-792-85)

摘　　要：针对抗滑群桩设计理论方面存在的问题,即荷载传递及滑坡推力分配的不确定性,基于极限分析的上限定理,给出了一种抗滑群桩的设计方法,即人为增大第一排抗滑桩的桩间距,并按极限土压力公式设计,作用在第二排抗滑桩上的荷载则按照上限定理给出。根据上述思想,并结合滑坡能量安全系数的定义和多块体体系速度场计算方法,提出了抗滑群桩的一种设计理论。In view of uncertainty of load transfer and landslide thrust distribution in design theory of anti-slide group piles and based on the plastic limit upper bound theorem,a new design method of anti-slide group piles was put forward.The method includes enlarging the space between the first row of anti-slide plies,and then using limit earth pressure formula to design.The load that acts on second row of anti-slide piles will be obtained by the plastic limit upper bound theorem.According to these ideals,and combining with the definition of energy safety coefficient and the calculation method for velocity field of multi-block,a new design method of anti-slide group piles is proposed.

关 键 词：上限定理 抗滑群桩 设计 极限状态 

分 类 号：P642.22[天文地球—工程地质学]