以复杂地质条件下的隧道工程为背景,分析了岩溶水、断层、地下水、天然气、地热以及地应力对施工风险的影响,对各地质不良影响因素进行风险评估和定级,同时对评价过程中风险级别较高的因素进行了针对性的补充地质勘查,通过二次风险评估显示该类因素风险等级明显得到了降低,为类似隧道的风险分析提供指导。%Taking the tunnel projects under the complicated geological conditions as the background,the paper analyzes the influence of the karst water,the faults,the underground water,the natural gas,the geothermal,and the ground stress on the construction risks,undertakes the risk evaluation and gradation on the factors which have unfavorable influence on the geology,has the accordingly supplementary geological observation over the factors with higher risk grades in the evaluation process,displays the risk grades of the factors were reduced by the second rick evaluation,and provides the direction for the risk analysis in similar tunnels.
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