西部地区长大隧洞作为国家战略和生命线工程的重要基础设施，面临复杂地震地质环境，其地震安全问题突出,非一致地震动作用下的动力响应与破坏机制是亟待突破的理论与技术难题。本项目拟以滇中引水工程中的长大隧洞—香炉山隧洞为依托，以隧洞震害调查与经验认识为基础，通过地质调查、现场测试、室内实验、模型试验、数值模拟等方面的集成研究，探讨长大隧洞工程场地空间非一致性地震动的输入机制，发展长大隧洞地震动力响应分析模型与方法；通过研究输入地震动与围岩动力响应的频谱相关性、不同部位围岩地震动力响应的空间非一致性、围岩与结构地震动力响应的相关性与协调性，揭示长大隧洞地震动力响应的时空效应；通过研究不利地质结构带围岩地震动力破坏演化规律，分析围岩与结构动力相互作用机制及诱发的结构破坏特征，揭示长大隧洞地震动力破坏机制，从而为长大隧洞抗震安全提供理论与技术支持，在推动岩石动力学和地下工程学科发展方面发挥积极作用。

As an important infrastructure for national strategy and lifeline engineering, the long and large tunnels in west China are in the complex seismic geological environment and they have significant seismic safety problems, and the dynamic response and failure mechanism under non-uniform seismic excitation is urgent research topic. In this project, taking the Xianglushan tunnel of centralYunnan diversion as an engineering background, on the basis of the investigation and experience of earthquake damage of tunnels, using the geological survey, field testing, laboratory experiments, model test and numerical simulation methods, the spatial non-uniformity and input mechanisms of ground motion in the long and large tunnel site are investigated, and the dynamic model and analysis method are also developed; then, through studying three aspects, including the spectrum correlation between seismic excitation and dynamic response of surrounding rock, the spatial non-uniformity of seismic dynamic response in different surrounding rock, and the relevance and coordination of seismic dynamic response between surrounding rock and structure, the time-space effect of dynamic response of the long and large tunnel is revealed; last, dynamic damage evolution of surrounding rock in the unfavorable geologic structure belt is studied, dynamic interaction mechanism between the surrounding rock and structure and induced structural damage characteristics is analyzed, and dynamic failure mechanism of the long and large tunnel is revealed. The research results can provide theoretical and technical support for the seismic safety of the long and large tunnel, and also effectively push the development of the rock dynamics and underground engineering.