激光光谱技术对滑带土改性过程中阳离子交换的时间演化研究  

Time-Evolution Study on the Cation Exchange in the Process of Reinforcing Slip Soil by Laser-Induced Breakdown Spectroscopy

作　　者：刘鲁文[1] 曾伟丽[2] 朱湘飞[2] 吴金泉[2] 林兆祥[2] 

机构地区：[1]中国地质大学数学与物理学院,湖北武汉430074 [2]中南民族大学激光光谱实验室,湖北武汉430074

出　　处：《光谱学与光谱分析》2014年第3期805-807,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40972185);中央高校基本科研业务费专项资金优秀青年教师基金项目(CUGL110237)资助

摘　　要：目前岩土工程性能的测试多为破坏性试验,不能用于固土现场的在线监测。激光击穿光谱(laserinduced breakdown spectroscopy,简称LIBS)技术具有快速、实时在线等特点。利用自行搭建的一套LIBS检测系统对不同配比的离子土固化剂(ionic soil stabilizer,ISS)水溶液改性滑带土进行了时间演化研究,并通过与改性后土壤的塑性指数、粘聚力、压缩系数等工程性质的比对,发现在现有的三个配比(1∶100,1∶200,1∶300)中1∶200的ISS改性过程中阳离子交换速度最快,工程性能指标显示改性效果非常明显,这些工作为ISS应用于固土工程提供了实验依据,同时也为岩土工程性质的检测提供了一条新的思路。In the present paper ,the time evolution study on slip soils treated by different proportions of ionic soil stabilizer （ISS） water solution was conducted by the LIBS system and the relationship between the cation exchange and such engineering proper-ties of reinforcing soil as plasticity index ,cohesive force and coefficient of compressibility were analyzed .The results showed that the cation exchange velocity of the proportion of 1∶200 ISS reinforcing soil is the fastest among the three proportions （1∶100 ,1∶200 and 1∶300） and the modification effect of engineering performance index is quite obvious .These studies provide an experimental basis for the ISS applied to curing project ,and monitoring geotechnical engineering performance by LIBS technolo-gy also provides a new way of thinking for the curing project monitoring .

关 键 词：激光击穿光谱 离子土固化剂 阳离子交换量 工程性质 

分 类 号：O433.1[机械工程—光学工程]