论文部分内容阅读
蠕变特性是岩石类材料的重要力学性质之一,与岩石工程的长期稳定和安全密切相关。本文采用RLJW-2000微机控制岩石三轴流变仪,在分级加载条件下对杭兰高速公路巫山至奉节段中三叠统巴东组二段(T2b2)干燥状态下的紫红色粉砂质泥岩进行了三轴压缩蠕变试验。在蠕变试验的基础上,分析了泥岩轴向蠕变变形与径向蠕变变形特征。通过对试验数据的整理与分析,发现泥岩存在显著的蠕变特性,符合Burgers模型,并求取了不同应力水平下的蠕变参数。试验结果表明,紫红色泥岩蠕变试验曲线与理论曲线吻合较好,Burgers模型能较好的描述T2b2紫红色泥岩的蠕变特性,研究成果可为进一步研究该地层中滑坡的蠕变特性提供模型和参数。
Creep properties are one of the important mechanical properties of rock-like materials and are closely related to the long-term stability and safety of rock engineering. In this paper, RLJW-2000 computer-controlled rock triaxial rheometer was used to analyze the purple-red silty mudstone of T2b2 in the Middle Triassic Badong Formation from Wushan to Fengjie of Hang-Lan Expressway Triaxial compression creep tests were performed. Based on the creep test, the axial creep deformation and radial creep deformation of mudstone are analyzed. Through the sorting and analysis of experimental data, it is found that there is a significant creep characteristic of mudstone, which accords with Burgers model and obtains the creep parameters under different stress levels. The experimental results show that the creep test curve of magenta mudstone is in good agreement with the theoretical curve, and the Burgers model can better describe the creep characteristics of T2b2 magenta mudstone. The research results can provide a model for further studying the creep characteristics of landslides in this formation And parameters.