基于AHP-模糊综合法的浅埋隧道施工风险评估

Risk Assessment of Shallow Buried Tunnel Based on AHP and Fuzzy Synthesis Method

浅埋隧道受地质、地形、环境的影响,在施工中容易发生边坡坍塌、塌方(冒顶)、山体开裂、变形失稳等风险,结合宁安城际铁路隧道分析了浅埋隧道施工安全、工期、环境风险。介绍了基于AHP(层次分析法)的改进模糊综合法进行浅埋隧道施工风险评估的基本原理和步骤,建立了浅埋隧道施工风险层次分析模型,采用改进的模糊数构建风险发生可能性判断矩阵。最后通过风险系数确定了宁安城际铁路钟鸣一号浅埋隧道施工风险等级,结合隧道施工特点及风险评估结果,提出典型风险控制措施。

The construction risks occur easily in shallow buried tunnel, such as side collapse, tunnel roof fall, hill aspect cracks, deformation instability which are caused by geological, terrain and influence of the environment. The security, duration and environmental risk of Ning-An inter-city railway shallow tunnels are analyzed. Then, the risk assessment principles and steps of the improved fuzzy synthesis method based on AHP are introduced. An analytic hierarchy model of shallow tunnel construction and the possibility judgment matrix depend- ing on improved fuzzy number are established. Finally, the Zhongming No. 1 Tunnel risk grade is determined through risk coefficient and the typical risk reduction measures are put forward, combining with tunnel characteristics and risk assessment results.