深埋引水隧洞作为高效利用水资源的重要手段，隧洞主体围岩-支护结构长期安全性是长距离引水工程亟需解决的问题。本项目以锦屏二级深埋引水隧洞的长期安全性为研究背景，采用物理模型试验、理论分析、数值模拟、现场实时感知与监测相结合的方法，重点解决1）深埋长隧洞围岩-支护结构在环境变化条件下的长期性能预测和控制方法；2）长大深埋隧洞围岩-支护结构破坏过程的实时感知技术与分析方法；3）循环内外水压作用下隧洞长期安全性评价与控制方法三方面的核心问题。通过本项目的研究，揭示深埋长隧洞围岩-支护结构在内外水压共同作用下的损伤演化和失效破坏机制，研发可以在动水中行走和定位、用于检测深埋长隧洞围岩与衬砌支护结构损伤和异常变形的无接触实时智能检测系统，提出适用于深埋内外高水压环境的隧洞围岩-支护系统的长期安全性动态评价与控制方法，为复杂条件下深埋长隧洞的安全高效运行提供科学依据和技术支撑。

Deep buried water diversion tunnel is an important means to utilize water resources efficiently, it is urgent to solve the problem of the long-term safety of surrounding rock-support system of tunnel main body in long-distance water diversion project. The research is based on the long-term safety of the surrounding rock-support system of deep buried water diversion tunnel of Jinping cascade 2. With the method of combining physical model test, theoretical analysis, numerical simulation and in-situ real-time perception and monitoring. The project focuses on three key problems shown as follows. 1) long-term performance prediction and control method of surrounding rock-support system of long deep buried tunnel under changing environment condition; 2) real-time perception technology and analysis method of failure process of surrounding rock-support system in long deep buried tunnel; 3) long term safety evaluation and control method of tunnel under cyclic internal and external water pressure. Through the research of this project, the damage evolution and failure mechanism of the surrounding rock-support system of long deep buried tunnel under the combined action of internal and external water pressure are revealed, a non-contact real-time intelligent detection system that can walk and locate in the flowing water for detecting the damage and abnormal deformation of surrounding rock and lining support system of long deep buried tunnel is developed, a dynamic long-term safety assessment and control method of surrounding rock-support system suitable for deep buried tunnel under internal and external high water pressure environment is proposed, providing scientific basis and technical support for safe and efficient operation of long deep buried tunnel under complicated conditions.