复杂地质条件隧道运营期危险源辨识分析

Identification and Analysis of Hazard Sources for Operational Tunnels under Complex Geological Conditions

在我国中西部地区,处于围岩流变、高水压、高海拔冻胀、高地震烈度等复杂地质条件下的大量运营隧道,可能发生支护结构劣化、列车撞击和火灾等情况,种种因素所带来的潜在风险将严重并长期影响隧道的安全运营。通过对大规模隧道群复杂地质条件的研究,结合隧道面临的混凝土剥落、渗漏水、地震破坏、初期支护与二次衬砌开裂等灾害的产生机理,对隧道变形破坏特征及其支护结构的力学行为进行分析,并对潜在危险源进行辨识,得到相应结论。

In the central and western China,many operational tunnels are under the complex geological conditions such as rheological surrounding rocks,high water pressure,frost heave caused by high altitude,high seismic intensity and so on,resulting in the deterioration of support structure,train crash,fire and other possible conditions,the potential risks brought by the various factors will have serious and long-term impacts on the safe operation of tunnels.Through the study of the complex geological conditions of large-scale tunnel groups,and combining the mechanism of the disasters of the concrete scaling,leakage,earthquake damage,initial support and secondary lining’s cracking and other disasters,the destruction characteristics of the tunnel’s deformation and the mechanical behavior of the support structure are analysed.The potential hazard sources are identified and the corresponding conclusions are obtained.