【摘要】 三峡库区库岸边坡消落带内部岩体在水位升降过程中长期处于饱和状态，为研究内部岩体的变形特性，通过选取库岸边坡岩体，按照相关规程制成标准岩样，利用TOP INDUSTRIE多功能岩石三轴测试系统，开展了无水压、有水压和循环水压3种状态下的饱和砂岩蠕变试验。结果表明：(1)饱和砂岩蠕变变形量在循环水压状态下最大，有水压状态下次之，无水压状态下最小；(2)饱和砂岩稳态蠕变速率的大小与蠕变变形量大小存在正相关性；(3)循环水压对饱和砂岩环向变形的影响大于对轴向变形的影响，在破坏应力等级阶段，循环水压对饱和砂岩环向变形的加剧作用明显；(4)循环水压大幅降低了饱和砂岩的长期强度，循环水压下的饱和砂岩最先破坏。更多还原

【Abstract】 Rock mass in the water-level fluctuation zone of bank slope of the Three Gorges Reservoir area has been saturated for a long time during the process of water level rise and fall. In order to study the deformation characteristics of the internal rock mass, the rock mass on bank slope of the reservoir is selected, standard rock samples are made according to relevant regulations, and TOP INDUSTRIE multi-functional rock triaxial test system is used. Creep test of saturated sandstone has been carried out under three states: no water pressure, with water pressure and circulating water pressure. The results show that:(1) The creep deformation of saturated sandstone is the largest in the state of circulating water pressure, the next in the state of water pressure, and the smallest in the state of no water pressure.(2) There is a positive correlation between steady state creep rate and creep deformation of saturated sandstone.(3) The influence of circulating water pressure on the circumferential deformation of saturated sandstone is greater than that on the axial deformation. In the stage of failure stress grade, the effect of circulating water pressure on the circumferential deformation of saturated sandstone is obvious.(4) The cyclic water pressure greatly reduces the long-term strength of saturated sandstone, and the saturated sandstone under the cyclic water pressure is the first to be destroyed.更多还原