采用自行设计加工的挂重型岩石材料直接拉伸装置,对重庆市某地红砂岩进行了短时分级加载单轴直接拉伸蠕变试验,并对该砂岩的蠕变特性进行了分析。结果表明,砂岩在该试验条件下具有明显的蠕变特性,其蠕变表现为衰减蠕变和稳态蠕变两个阶段,砂岩蠕变量与稳态蠕变速率随着荷载的增加而增加。应用三参量广义Kelvin模型与Burgers蠕变模型描述该砂岩的蠕变规律,结果表明,两个模型均可以准确描述该砂岩的蠕变特性,其中,Burgers蠕变模型效果更佳。本文所得结论可为从事相关研究的工作人员提供一定的借鉴。 Using the direct drawing device of hanging heavy rock material designed and processed by ourselves, the short-time grading and loading uniaxial direct tensile creep test of red sandstone in a certain place in Chongqing was carried out, and the creep characteristics of the sandstone were analyzed. The results show that the sandstone has obvious creep characteristics under the test conditions. The creep shows two stages of decay creep and steady creep. Sandstone creep and steady creep rate increase with the increase of load . The three-parameter generalized Kelvin model and the Burgers creep model are used to describe the creep law of the sandstone. The results show that both models can accurately describe the creep characteristics of the sandstone. Burgers creep model is more effective. The conclusions obtained in this paper can provide some reference for the staff engaged in relevant research.