【作者】 刘月妙； 王驹； 谭国焕； 林侨兴； 李焯芬； 李启光；

【Author】 Liu Yuemiao Wang Ju Tham L.G. Lin Q.X. Lee C.F. Lee P.K.K. ( Beijing Research Institute of Uranium Geology, Beijing 100029 China; Department of Civil Engineering, The University of Hong Kong, Hong Kong China; Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083 China)

【机构】 核工业北京地质研究院； 香港大学土木工程系；

【摘要】 中国高放废物的最终处置方案是深地质处置,花岗岩为我国高放废物处置库的候选围岩,甘肃北山地区已被初步选定为我国高放废物处置库场址的重点预选区。通过一系列室内蠕变实验,研究了在不同温度(室温,50℃,90℃)条件下,北山深部花岗岩在不同恒定应力水平下的变形特征。实验结果表明:随着温度的升高,花岗岩的弹性模量逐渐降低;在室温与50℃时,温度对花岗岩的长期性能的影响并不明显; 但当温度升高到90℃,岩石的裂纹损伤应力比室温时大约降低10％;稳态蠕变阶段的应变速率随着温度的升高而明显加速,在同一应力比下到达破坏的时间相应降低。更多还原

【Abstract】 A preliminary R&D program for the deep geological disposal of high-level radioactive waste (HLW) has been proposed in China. The HLW repository concept is shaft-tunnel-silo located in a saturated zone in granite. The Beishan area in a Gobi desert in Gansu province is considered as the most potential candidate area for HLW geological repository in China. A series of uniaxial constant loading tests under different temperatures has been conducted on Beishan deep granite. The results indicate that the elastic modulus decrease as the temperature increase. The temperature under 50℃ has no significant effect on the time dependent behavior. When the temperature is raised to 90℃, the crack damage stress decreased to 90% of that at room temperature. The strain rate under constant loading increases as the temperature increase. The time to failure response decrease accordingly.更多还原