武汉地铁2号线矿山法施工区间隧道风险分析及其控制

地铁隧道因地质条件及周边环境的复杂性、不确定性等特点,施工风险较高。本文根据武汉地铁2号线一期工程沿线遭遇的各类不良地质问题,结合工程地质及水文地质条件和周边环境特点,辨识出武汉地铁2号线一期工程矿山法施工区间隧道主要的风险事件并进行了风险分析;同时采用R=P×C的风险定级方法,定量得到各风险事件的风险等级;并根据风险评估的结果,对风险较高的事件提出了具体的风险控制措施,从而确保了工程的顺利进行。该研究可为其他类似工程提供参考。

Risk Analysis and Risk Control on the Tunnel of Wuhan Metro Line 2 by Mining Method

Because of the complex and uncertain geological conditions and surrounding environments,the metro tunnel has a high construction risk.Worse still,many kinds of adverse geological problems are encountered in the construction of the first-phase project of Wuhan Metro Line 2,leading to a very high construction risk.Combined with engineering geological conditions,hydrogeologic conditions and the surrounding environment characteristics,this paper identifies and analyzes the main risk problems on the tunnel of the first-phase project of Wuhan Metro Line 2 by mining method,and obtains the risk level of each risk problem quantitatively by using risk grading methods of R=P*C.Based on the results of risk assessment,the paper proposes some measures to reduce or control the risk loss of high risk problems and provides some references to the risk assessment of other similar engineering cases.