饱水-干燥循环和长期饱水砂岩劈裂试验  

Split Test of Sandstone under Conditions of Cyclic Saturation-drying and Long-term Saturation

作　　者：朱朝辉[1] 吴平[1] 姚华彦[1] 朱大勇[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《水电能源科学》2012年第12期58-60,47,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50909053);2010年教育部高等学校博士学科点专项科研基金资助项目(20100111120002);合肥工业大学发展基金资助项目(2010HGZY0014)

摘　　要：地下水位的不断变化使岩体往往处于饱和-干燥交替状态,对岩体工程的长期稳定性不利。为分析饱和-干燥循环作用对岩体的抗拉强度影响规律,以砂岩为研究对象,开展了砂岩在饱水-干燥循环作用后处于干燥、饱和及长期浸泡饱和三种状态的巴西劈裂试验,分析了不同条件下的水-岩作用对岩石抗拉强度的影响规律。结果表明,砂岩抗拉强度的降低在饱和-干燥循环条件下比长期浸泡条件下更显著。The continuous change of underground water level makes the rock mass in a saturated drying alternate status and it is unfavorable to long-term stability of rock mass engineering. In order to analyze the impact of saturation drying cycle on rock mass tensile strength, taking sandstone as research object, Brazil splitting tests are implemented under the conditions of dry, sat- uration and long-term soaking saturation. And the influence of water rock interaction in different conditions on rock tensile strength is analyzed. The results show that the reduction of sandstone tensile strength in saturation drying cycle condition is obvi- ous than that in long-term soaking condition.

关 键 词：岩石力学 水-岩作用 饱水-干燥循环作用 抗拉强度 巴西劈裂 试验 

分 类 号：TU458[建筑科学—岩土工程]