非贯通裂隙岩体经验强度准则的研究

根据单轴、双轴和三轴压缩条件下非贯通裂隙岩体模型的强度试验结果及其规律，通过岩体强度特征的理论分析，本文提出一个考虑中间主应力影响、适用于不同应力条件的非贯通裂隙岩体经验强度准则，并对准则中参数确定与选取进行了讨论。最后，以室内模型试验和现场试验数据，对提出的准则作了应用和验证。

Study on the Emporical Strength Criterion for Intermittent-Cracked Rock Masses

Strength criteria have a wide application in geomechanical engineering. Theoretical and experimental studies on the strength characteristics of rock masses have shown that it is unreasonable to neglect the influence of the intermediate principal stress in existing empirical stren8th criteria for rock masses, On the basis of the strength results and its laws from the model tests of intermittent-cracked rock masses under uni-,bi and tri-axial comperession conditions,a new empirical strength criterion is proposed to reflect the intermediate principal stress the real effett of and fit various stress conditions. It is also shown how to get the paranlenters in the criterion for rock engineering.Lastly,the criterion proposed is verified in laboratory and field tests.