关键词: 深埋长隧洞, 风险应对体系, 复杂地质条件, 不良地质风险, 滇中引水工程

Abstract: During the construction of deep-lying long tunnels under complex geological conditions, unfavorable geology risk is the maximum risk that affects the safety, progress, quality and investment of engineering construction. Improper response often leads to out-of-control of periods and investment. And in serious cases, there will be major safety accidents, loss of life and property and other negative effects. By summarizing the previous engineering experience and following the idea of advance risk control, the response system for unfavorable geology risk in deep-lying long tunnel has been established. Based on the perspective of survey and design, the system is divided into four levels: overall avoidance, comprehensive survey, design analysis and risk control. During the Xianglushan tunnel construction of water diversion engineering in central Yunnan Province, by implementing this system, we made advance planning of risk response and mitigated the tunnel risks in terms of safety, investment and construction period. It can also provide reference for survey and design in similar tunnel construction.

Key words: deep-lying long tunnel, risk response system, complicated geological conditions, unfavorable geology risks, water diversion project in central Yunnan Province