中文摘要：

在许多情况下非线性Hoek-Brown经验准则比较符合实际,但对采用该准则且考虑围岩流变特性的洞室变形解析解研究较少。基于此,在前人基础上采用广义Hoek-Brown准则研究理想弹-脆-塑性岩石流变效应下的围岩变形。首先,为了简化推导过程,假设围岩体积不变,依据广义Hoek-Brown准则推导了围岩的流变变形解析解;其次,为了接近工程实际,考虑体积的变化,采用非关联流动法则推导了围岩的流变变形解析解;最后,分别选取宾汉姆体和西原体作为流变模型计算了两种推导的情况。结果表明,h值越大即膨胀角越大,围岩的流变变形越大;若不考虑体积变化,计算的流变变形偏小。

英文摘要：

In many cases, the nonlinear Hoek-Brown empirical criterion would be appropriate for engineering prac-tice, however, there has been little research on analytical solutions for tunnel deformation by the nonlinear Hoek-Brown empirical criterion that considers the rheological behavior of the rock. Therefore, based on previous studies,the generalized Hoek-Brown criterion was used to research surrounding rock deformation under the rheological ef-fect of an ideal elastic-brittle-plastic rock. First, in order to simplify the deduction process, an analytical solutionfor the rheological deformation of the surrouding rock was determined by the generalized Hoek- Brown criterionbased on the assumption that the volume of the surrounding rock remains constant. Secondly, according to engineer-ing practice, volume changes were taken into account while deducing the analytical solution for the rheological defor-mation of the surrouding rock by the nonassociated flow rule. Finally, the Bingham and visco-elastoplastic modelswere used, respectively, as the rheological models to calculate the two deductions, and it was concluded that the larg-er the dilatancy angle, the higher the h values as well as the rheological deformation of the surronding rock. Provid-ed volume changes are not considered, and the calculated rheological deformation is smaller than that in practicalcases.