摘要
从塑性极限分析上限定理出发,结合可靠性分析方法(JC法),建立矸石山塑性极限分析可靠度极限状态函数,给出基于塑性极限分析条分法的矸石山滑坡可靠度指标的计算方法,并对矸石山滑坡稳定性进行了分析。结果表明,在进行矸石山稳定性计算时,如不考虑矸石散体参数的变异性,采用极限平衡理论计算得出的安全系数则存在一定的风险。在参数变异性较大时,采用可靠度方法进行矸石山的稳定性评价更能体现工程实际。
We established the plasticity limit analysis reliability limit state equation and the reliability calculating formula for gangue hills using the JC method. This work was based on the plasticity mechanics limit analysis upper bound theory and traditional slice methods. A reliability index of gangue hill stability was derived using this equation. It was found that the safety coefficient of gangue hills derived by the limit state equation risks failure if the variability of cohesion and internal friction angle are not considered. When the variability of the strength parameters rises, the reliability theory more consistently projects practicality than the limit state equation for gangue hill stability assessment.
出处
《重庆大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2008年第12期1441-1445,共5页
Journal of Chongqing University
基金
重庆市自然科学基金资助项目(CSFC
2006BBDF171)
重庆大学"985工程"基金资助项目(0903005104957)
关键词
矸石山
塑性极限分析
条分法
安全系数
可靠性分析
gangue hill
plastic limit analysis
slice methods
safety factor
reliability analysis