中文摘要：

岩石的流变特性是岩石的重要力学特性之一,其中岩石的长期强度是绝大多数岩土工程所必须引起重视的力学特性,然而就目前研究现状而言,与蠕变特性相比较是极不对称的。由岩石蠕变试验确定岩石的长期强度是现有最常用的方法,具有重要的现实意义。通过对完整红砂岩在CSS-2950岩石双轴流变试验机上进行的单轴压缩蠕变试验,利用过渡蠕变法、等时曲线法探讨了这些方法确定岩石长期强度在理论上的正确性和试验方法的可操作性,同时,将蠕变曲线与应力-应变曲线结合,提出了确定岩石长期强度的新方法,预测了岩石在荷载作用下可能破坏的时间。分析结果表明,将蠕变曲线与应力-应变曲线结合确定岩石长期强度对岩土工程设计具有重要的指导意义。

英文摘要：

Rheological property is one of the most important mechanical properties of rock.Great importance shall be attached to long-term strength of the rock among mechanical properties in most geotechnical engineering,while the present study of it is asymmetrical compared with the creep property.Creep test is the most common and practical way to confirm long-term strength of rock.Based on uniaxial compression creep test of red sandstone rock in the CSS-2950 biaxial rheological testing machine;theory accuracy and operability of transition creep and isochronous curve methods are discussed in the research of testing long-term strength of the rock.Meanwhile,a new method to confirm long-term strength of the rock is proposed;and the time for rock to be destroyed under load is predicted by the combination of creep curve and stress-strain curve.The results show that the combination of creep curve and stress-strain curve plays a leading role in the confirmation of long-term strength of the rock in geotechnical engineering field.