摘要
常规边坡稳定分析中常采用单一安全系数,在很多情况下是不合理的。为研究安全系数非均值性对边坡稳定分析的影响,基于极限分析法,推导了简单条分法、简化毕肖普法和复合滑动面法考虑安全系数非均值性时的计算模式。计算结果表明,在土层强度差距较大的情况下,采用单一安全系数,相对软弱层的安全系数会被高估,而相对坚硬层的安全系数被低估,这会使得计算结果偏于不安全。
Uniform safety factors are normally used in slope stability analysis, which is not reasonable in many cases. To study the influence of nonuniformity on slope stability analysis, the calculation formulas are obtained based on Fellenius, Bishop and multiple- sliding surface method. The calculation results shows that the safety factors of soil mass with relatively low strength will be overestimated and the safety factors of soil mass with relatively high strength will be underestimated if soil mass of slope vary widely in the strength. This will lead the calculation to be on the unsafe side.
出处
《四川建筑科学研究》
2013年第1期110-113,共4页
Sichuan Building Science
基金
交通运输部应用基础研究项目
中交股份科技开发基金资助项目(2007-ZJKJ-13)
关键词
边坡
安全系数
非均值性
渐进破坏
slope
safety factor
nonuniformity
progressive failure
