欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
研究如何对铁路黄土隧道塌方风险事故进行管理控制,先从地质因素、施工方法因素、监控量测因素和施工管理因素分析了黄土隧道塌方事故的成因。接着依据铁路行业隧道风险评估指南矿山法隧道施工风险因素列表,识别影响兰渝铁路某黄土隧道项目塌方的18项主要风险因素。然后运用系统工程解释结构模型方法（ISM）分析项目各风险因素间的相互关系,得出影响该隧道项目塌方的直接原因为施工扰动过大、支护不及时、拱脚悬空时间过长和信息反馈处理不及时。底层原因则为开挖方式、特殊地质条件。在上述基础上建立项目塌方事件模糊故障树模型,进行模糊定量分析,得到项目塌方事件发生的模糊概率和关键风险因素的模糊重要度。结果表明,实例黄土隧道项目塌方事故风险概率很大,地质因素、开挖方法等对塌方事故影响最大。解释结构模型方法能揭示各风险要素间的不确定性因果关系,有利于把握事故发生机理,模糊数能客观地描述风险事件的发生概率,增强故障树诊断方法的可靠性。
英文摘要：
The purpose of this study is to make a comprehensive analysis of the underlying influential factors which may account for the railway loess-featured tunnel collapse and,in turn,to establish a model for identifying and forecasting the likely risks to take place in the construction practice of such railway tunnels. It is just for the aforementioned purpose that we have first of all managed to identify and determine the causes and mechanisms for such tunnel collapse and the principal risk-involving factors of the case study sample,that is,the loess tunnel in the LanzhouChongqing Railway. And,then,we have made detailed analyses for the mutual relations among the above said influential factors with an Interpretation Structure Model（ ISM）. In so doing,we have been trying to adopt an Interpretative Structural Chart for depicting the most closely linked influential factors that may lead to the likely collapses,such as the extremely strong construction shocks and disturbances; not timely providing badly-needed supports; too long the close-looped cycles; unreasonable stair-case elevations; unqualified construction labor force; inappropriate choice of the excavation methoad; the underground water drainage; unqualified or unsatisfactory geological engineering investigation and project inspection; inefficient or ineffective on-spot engineering monitoring and control; low-quality concrete or cement building,etc. Based on the above said analyses in combination with the application of the fuzzy mathematical theory and the Fault Tree Theory,we have developed a Fuzzy Fault Tree model,and made a series of quantitative and qualitative analyses of the actual necessary evaluation items in reference to the key fuzzy critical risk-involving factors of the sample project. The results of our investigation and analysis show that the risk probability of the above mentioned sampling project is quite high with the groundwater leakage likeliness,in addition to the inappropriate choice of excavation approaches and unreasonable stair-case le
同期刊论文项目
同项目期刊论文
期刊信息
位置：