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岩石抗拉强度是研究岩石破裂、岩体失稳和岩体破坏过程的重要输入参数,但是如何准确确定岩石抗拉强度仍然存在很多争议。本文系统地梳理和总结了多种抗拉强度测量方法的研究成果,岩石抗拉强度测定包括直接拉伸法和间接拉伸法,其中直接拉伸法包括直接拉伸试验、双轴延伸试验、Luong试验;间接拉伸法包括巴西劈裂试验、弯曲拉伸试验、空心岩柱液压致裂试验等。对各种方法的研究现状、试验原理、影响因素、试验结果进行了简要总结回顾,比较了各试验的特点及适用范围。为日后工程实践中较好地选择岩石抗拉强度的测量方法提供参考。
Tensile strength of rock is an important input parameter for studying rock failure, rock instability and rock failure process. However, there are still many controversies about how to accurately determine rock tensile strength. This paper systematically combs and summarizes the research results of a variety of tensile strength measurement methods, rock tensile strength measurement including direct and indirect tensile method, including direct tensile method including direct tensile test, biaxial extension test, Luong test; indirect tensile method including the Brazilian splitting test, bending tensile test, hollow column hydraulic fracturing test. The research status of various methods, test principle, influencing factors and test results were briefly reviewed, and the characteristics and applicable scope of each test were compared. It provides a reference for better selection of measuring method of rock tensile strength in engineering practice in the future.