【摘要】 Hoek- Brown准则在节理岩体边坡 ,基础和地下开挖工程的设计和施工中 ,近十余年来已在许多国家广泛应用。采用三轴试验确定参数 m和 s,已有一套完备的程序。但是现场只能采用直剪试验 ,目前的方法尚不合理 ,本文提出了一种改进的参数反分析的正演法。研究得到的结论对实际工程具有现实意义。更多还原

【Abstract】 The well known Hoek-Brown rock mass failure criterion has been successfully applied in the preliminary design of underground excavations, slopes and foundations in jointed rock masses. Though there has been a complete program for determining parameter m and s by tri axial test, there was only the direct shear test could be applied in situ. In this paper, the back analysis method to estimate the strength parameters of Hoek-Brown criterion is put forward. The proposed procedure provides a rational basis to assess the suitability of rating methods and their relationship with the rock mass strength parameters by dint of the in situ direct shear tests.更多还原