公路隧道洞口段施工风险评估与控制研究

摘要

山岭隧道建设条件复杂，洞口段不确定因素较多，在施工过程中易发生安全风险事件。为降低和控制施工风险，有必要对洞口段施工风险进行评估。以宝汉高速公路梁山2号隧道洞口段施工为研究对象，根据隧道洞口段地质与地形条件、设计图纸以及施工方法等进行风险辨识，并采用层次分析法对风险源进行重要性排序。同时，采用专家调查法对洞口段施工风险发生概率和风险损失等级进行调查统计，并确定风险等级。在此基础上，提出了有针对性的风险控制措施。%Due to construction complexity of mountain tunnel and the uncertain factors of tunnel portal section,security risk events are likely to occur during the construction. In order to reduce and control the risk,it is necessary to assess the risk of tunnel portal section construction. Taking the construction risk of Liangshan No. 2 tunnel portal section in Bao-han highway as the research object,this paper made risk identification by design drawings and construction methods according to geological and topographical conditions of tunnel portal section,adopted the analytic hierarchy process to rank the importance of risk source,implemented the investigation statistics of portal section construction risk probability and risk loss degree by using expert survey method,and identified the level of risk. Based on these works,the risk control measures are put forward for Liangshan No. 2 tunnel portal section construction.