1.Department. of Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2.College of Civil Engineering, Fujian University of Technology, Fuzhou, 350118, China
摘要 RMR法是地下工程中最为常用的岩体质量评价方法之一，RMR法取值的不确定性会极大的影响地下工程的安全。针对这一问题，本研究提出一种基于可靠度理论的围岩类别稳健评价方法。本研究将可靠度分析理论引入RMR法，构建不同围岩类别的功能函数；通过对RMR法中各参数概率分布规律进行分析，经Monte Carlo 法计算围岩隶属于各围岩类别的可靠度概率，进而稳健获取待开挖岩体的RMR值。结果表明：本研究从岩土体随机性特征出发，将可靠度理论引入分类评价问题中是可行的，经鲁山隧道工程验证，该方法可针对地下工程岩体RMR值计算结果的不确定性进行概率表征，其计算结果更加符合实际。本研究所提出的研究思路可供其他各领域研究进行参考，该可靠度分析方法也适用于其他岩体分类方法。
Abstract：
The rock mass rating (RMR) system is one of the most commonly used methods for classifying rock masses in underground engineering. Uncertainty of RMR values can significantly affect the safety of underground projects. In this regard, we proposed a reliable rating approach for classifying rock masses based on the reliability theory. This theory was incorporated into the RMR system to establish the functions of rock masses of different classifications. By analyzing the probability distribution patterns of various parameters used in the RMR system and using the Monte Carlo method to calculate the reliability probability of surrounding rock belonging to each
classification, reliable RMR values for the rock mass to be excavated can be obtained. The results demonstrate that it is feasible to adopt the reliability theory in classification tasks considering the randomness characteristics of rock and soil. As verified through a case study of the Lushan Tunnel project, the proposed approach can be used to obtain the probability of the uncertainty of the calculated RMR values of underground engineering rock masses, and the calculation results are consistent with reality. The proposed approach can serve as a reference for studies in other fi elds and also applies to other rock mass classifi cation methods.
2025, Vol. 22 
