Abstract:

The tunnels on ChongqingLichuan railway have complex geological conditions. Due to the numerous hazards, safety incidents occurred frequently. Fullcourse risk control is implemented in the design and construction of the railway, so as to ensure the construction safety and to achieve good economical and social significance. The concept of “highlighting the safety consciousness, enhancing the risk assessment, bringing the process under control and emphasizing the emergency coping” are stressed, the route of the railway is optimized in the design stage and the risks are planned, identified, assessed and mitigated in the construction stage, so as to minimize the risks. The experience in the control of the risks of the mentioned tunnels is summarized. In the end, the management level of risk control has been improved and good effect has been achieved. 

Key words: ChongqingLichuan railway, tunnel, safety, risk control, karst, karst chamber