北京地铁施工阶段地质风险辨识评估及防控机制建设

阐述地铁施工阶段地质风险特征及研究现状,结合勘察、设计、第三方监测等资料,分析可能导致事故的潜在地质因素并进行分类和辨识,提出基于风险发生概率和危害结果的PH地质风险评价方法并给出相应参考值,根据评价结果提出过程监控、加强探测和现场处置三类处理措施。基于北京市轨道交通风险管理体系,构建施工阶段地质风险动静态管控机构及工作流程,将该机制应用于北京地铁昌平线南延西土城站项目的风险管控工作,已取得良好的效果。

Establishment of Geological Risk and Prevention Mechanism in Metro Construction Stage

This paper describes the characteristics and research status of geological risk in the subway construction stage. The study also analyzes, identifies, and classifies the potential geological factors that may lead to accidents based on the geological survey data, design, and third-party monitoring. Strategies are also proposed based on the risk probability and geological hazard and risk assessment method of the pH value and corresponding reference value. Three types of treatment measures are suggested: process monitoring, strengthening detection, and onsite disposal. The risk management system of Beijing Mass Transit Railway as well as the dynamic and static control mechanisms and working processes of geological risk in the construction stage is applied to the risk management system of Xitucheng station, which is the South extension of the Changping Line of Beijing Metro. Satisfactory results were obtained.