论文部分内容阅读
根据事故树分析原理,建造了基坑锚杆支护结构脱黏的事故树图;采用专家调查法对10年之内各基本事件的发生概率给出经验估计值;在确定最小割集的基础上,进行了顶事件概率的计算;最后通过敏感性分析,对各基本事件的敏感性进行排序,揭示基本事件对于顶事件的贡献程度。结果表明,基坑锚杆支护结构脱黏的概率为0.170 23;土层锚杆脱黏失效对锚固段长度最为敏感;在编制风险分析报告时,除了对敏感性排序靠前的事件进行评价,同时也需要考虑“与门”结构中敏感性排序靠前的几个事件。
According to the principle of fault tree analysis, the deforestation tree diagram of the debonding of anchor supporting structure in foundation pit was constructed. Empirical investigation was used to give empirical estimates of the occurrence probability of each basic event in 10 years. After establishing the minimum cut set Finally, through the sensitivity analysis, the sensitivity of each basic event is sorted to reveal the contribution of the basic event to the top event. The results show that the probability of debonding anchor pit supporting structure is 0.170 23; the debonding failure of soil anchor is the most sensitive to the length of anchorage section; in the preparation of the risk analysis report, in addition to the evaluation of the events with the highest sensitivity, , As well as the top-ranked sensitivity incidents in the AND-architecture.