摘要
在考虑垃圾土物理力学参数随机性的条件下,研究设垃圾坝垃圾填埋场抵抗平移破坏的稳定性。对设垃圾坝垃圾填埋场采用梯形–三楔体方法和可靠度分析方法,考虑垃圾土重度、内摩擦角及黏聚力作随机变量并且服从独立正态分布,通过一次二阶矩法可以得到垃圾填埋场边坡稳定性的可靠度指标。研究发现,岩土结构可靠度分析广泛要求可靠度指标达到3.0,为了满足这一要求,不同的破坏模式对安全系数的要求不尽相同。综合这2个指标(安全系数和可靠度指标)能够更好地评估设垃圾坝填埋场边坡的稳定性。
The stability of the landfill with an engineered berm against translational failure is studied by considering the randomness of the physical and mechanical parameters of the solid waste. Under the conditions of the trapezoidal three wedge method and reliability analysis method being used to the landfill with an engineered berm,the reliability index is calculated by the first order second moment method,considering the unit weight, internal friction angle,and cohesion of solid waste as random variables subjected to independent normal distribution. The results show that the requirement of safety factor with different failure modes is not the same so as to make the reliability index get to 3.0. Also,combining the safety factor with the reliability index can better assess the slope stability of the landfill with an engineered berm.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第S1期2713-2719,共7页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
可靠度指标
垃圾填埋场
平移破坏
垃圾坝
一次二阶矩法
soil mechanics
reliability index
landfill
translational failure
engineered berm
first order second moment method
