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岩体结构面强度是工程岩体稳定性设计中的重要参数,目前工程上常用的两个强度判据,即Mohr-Coulomb准则和Barton准则有各自适用条件。本文在对七组具不同岩性、不同粗糙度及起伏度红层样品进行试验的基础上,探讨了在试验过程中所揭示的强度周期性变化现象,同时基于两准则试验数据,分析了它们之间的区别,获得一些重要结论.即JRC、JCS越大,两准则差别越大;在低法向应力下两准则较接近,在高法向应力时,MC准则偏于危险。
The strength of rock mass structural plane is an important parameter in the stability design of engineering rock mass. Currently, the two strength criteria that are commonly used in engineering, Mohr-Coulomb criterion and Barton criterion, have respective applicable conditions. In this paper, based on the experiments of seven groups of red beds with different lithology, roughness, and undulation, the cyclical changes in intensity revealed during the experiment are discussed. Based on the two-criteria test data, they are analyzed. The difference between the two is to obtain some important conclusions. That is, the larger the JRC and JCS, the greater the difference between the two criteria; under the low normal stress, the two criteria are closer, and when the high normal stress is applied, the MC criterion is more dangerous.