参数随机性对边坡安全系数的影响  

THE EFFECT OF PARAMETER RANDOMNESS ON SAFETY FACTOR OF SLOPE

作　　者：宋云连[1] 张丽[1] 南雪兰[2] 

机构地区：[1]内蒙古工业大学建筑工程学院,呼和浩特010051 [2]内蒙古大学,呼和浩特010021

出　　处：《内蒙古工业大学学报（自然科学版）》2006年第1期49-54,共6页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自然科学基金项目"公路边坡结构的可靠性分析及其计算方法的研究(200408020708)";内蒙古工业大学重点研究项目"路面结构可靠性的分析与研究(ZD200416)"

摘　　要：以简单条分法和毕肖普法为例,分析了参数的随机波动对边坡安全系数F s的影响,具体讨论了随机参数重度γ、摩擦系数f和内聚力c对F s的影响.结果发现,这三个参数的随机波动和引起F s的波动是线性关系或可按线性关系进行拟合;参数随机性对F s的影响与这些参数所提供抗滑反力的权重大小有关,权重大的参数(如f)随机扰动时将引起F s值比较大的波动.另外,在相同条件下,上面提到的两种方法中,毕肖普法所得F s受参数随机波动影响较大.The effect of parameter randomness on safety factor of slope Fs is analyzed, with Fellenius method and Bishop method taken as examples. The randomness of weight coefficient γ, friction coefficient f and cohesion coefficient c are analyzed in detail. Its is found that the relationship of the randomness of these three parameters with the safety factor Fs is linear. Moreover, this relationship can be fitted by linear expressions. The effect of parameter randomness on Fs is related to the weight of the parameter in anti slippery force S. In other words, the greater the weight of a parameter in S is （for instance f）,the more safety factor Fs is affected by its randomness. The calculation result from the Bishop method, which is more precise than Fellenius method, may be affected by the random variables more considerably than that from the latter under the same conditions.

关 键 词：随机性 边坡稳定性 安争系数 

分 类 号：TU457[建筑科学—岩土工程] TU311.2[建筑科学—土工工程]