冻结温度影响下岩石细观损伤演化CT扫描  

CT scanning test of meso-damage propagation of rock under different freezing temperature

作　　者：杨更社[1] 张全胜[1] 蒲毅彬[2] 

机构地区：[1]西安科技大学建筑与土木工程学院 [2]中国科学院兰州寒区旱区环境与工程研究所冻土工程国家重点实验室甘肃兰州730000

出　　处：《长安大学学报（自然科学版）》2004年第6期40-42,46,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(40372119;10072047);教育部优秀青年教师基金项目(2091);陕西省自然科学基金项目(2003D05);冻土工程国家重点实验室基金项目(200104)

摘　　要：岩石冻融过程的细观损伤研究是近年来冻融损伤研究的一个新方向。岩石中的水分一般含有各种盐分,而盐分的存在降低了水的冰点,同时岩石本身的结构构造和力学性能也有差异性,这就使岩石冻结问题更为复杂。采用3种不同岩样,首先使其饱水,然后将其分别降低到0℃,-10℃和-20℃,利用CT扫描实验技术,研究了不同冻结温度条件下岩石内部的细观损伤扩展机理、水分迁移、冰的形成及其损伤结构的变化。利用区段划分和区段统计频率分析损伤演化过程,对寒区岩土工程的研究具有重要意义。The damage propagation of rock under the freezing and thawing condition is a new direction of rock damage mechanics. The water in the rock contains all kinds of salts, which lows the freezing temperature,the difference of rock structure and mechanics property is great. Three kinds of rock were used to study the damage propagation by CT scanning technology, firstly, the rock samples were separately saturated with water; secondly, the circumstance temperatures were lowed to 0 ℃,-10 ℃,and -20 ℃; finally, the evolution of rock damage was analyzed by the methods of division of the CT number scope and the statistic frequency. It is believable that the study has a big meaning to the geotechnical engineering in the cold region.

关 键 词：岩土工程 岩石 冻结温度 细观损伤 CT扫描 

分 类 号：P585.2[天文地球—岩石学]