燃气管线下穿高铁工程安全评估分析

在研究新建燃气管线下穿高速铁路工程中，采用危险性分析方法对新建管线施工及运营状态对铁路运营存在的潜在风险因素（危险源）进行定性和定量的安全风险评估。定性分析采用风险交流和专家调查法。定量分析利用有限元分析软件MIDAS-GTS建立三维空间模型来模拟土体开挖回填等工况。根据计算的结果分析整个施工过程对铁路桥墩的影响，判断是否存在安全风险，明确是否符合相关规范标准，评估铁路桥墩基础安全性，并提出防范风险的全局性对策。

Safety Assessment and Analysis of Gas Pipeline Undercrossing High-speed Railway Project

Aiming at the safety issues of the new gas pipeline undercrossing high-speed railway project, the risk analysis method is used to carry out the qualitative and quantitative safety risk assessment of the potential risk factors (hazard sources) existing in the construction and operation state of the new pipeline to the railway operation. The risk communication and expert investigation methods are used for the qualitative analysis. The finite element analysis software MIDAS-GTS is used to establish a three-dimensional spatial model to simulate the soil excavation and backfill and other conditions for the quantitative analysis. According to the calculation results, the influence of the whole construction process on the railway pier is analyzed to judge whether the safety risk exists, and to identify compliance with the relevant code standards. The safety of the railway pier foundation is evaluated, and the overall countermeasures to prevent risks are put forward.