中文摘要：

岩体结构面的蠕变特性研究对解决岩石力学实际问题具有很重要的意义,结构面的蠕变力学性态往往控制着岩体的时效变形和长期强度,研究结构面的剪切蠕变特性是岩石流变学的一项重要内容。通过规则齿形结构面在不同法向应力条件下的剪切蠕变试验,研究了不同角度结构面的剪切蠕变特征,并根据蠕变试验结果,对结构面的剪切蠕变特性进行了描述,对结构面剪切蠕变试验过程中的蠕变速率特性进行了研究。研究表明,结构面在蠕变试验过程中,严格意义下的稳态蠕变是不存在的,常说的稳态蠕变实际上是蠕变速度随时间缓慢减小的近似稳态蠕变过程。最后,提出改进Burgers模型来描述蠕变的剪切蠕变特性,并讨论了改进的Burgers模型对于描述结构面剪切蠕变特性的适用性。

英文摘要：

The creep characteristics of rock mass discontinuity is important for solving practical problems of rock mechanics,since it often controls the time-dependent deformation and long-term strength.Shear creep test of dentate discontinuity is carried out under different normal stresses to study the creep characteristics of discontinuities with different slope ratios.Based on the test results,the shear creep characteristics of discontinuities are described,and the creep rate characteristics of discontinuities are investigated.Results show that the steady creep does not exactly exist,and the steady creep what we often talk about is merely a quasi-steady state,and the creep rate in the process is actually decreasing over time.A modified Burgers model is proposed to describe the shear creep deformation characteristics of discontinuities.