Analysis and Countermeasures on the Risks in the Construction of Metro Shield Tunnel

Liu Wen-Jun, Fu He-Lin
Based on the geological conditions, hydrogeologic conditions and the engineering characteristics of the metro shield tunnel project, No.2 and No.8 extension line of Guangzhou subway(the 14th section), the main risk problem of this project are identified and analyzed, and the risk level of each risk problem is obtained quantitatively by using risk grading methods of R=P*C. Based on the result of risk assessment, some measures are proposed to reduce or control the risk loss of high risk problems,
more » ... high risk problems, which makes the corresponding emergency plane to the key and difficult Engineering.