松散岩土体在不同浸泡环境中阴离子浸出特征试验研究  

Experiment studies of anion leaching characteristics of loose rocks in different immersion environments

作　　者：董秋瑶[1,2] 梁合诚[1] 刘媛[1] 石迎春[2] 郭娇[2] 吴利杰[2] 

机构地区：[1]中国地质大学环境学院,武汉430074 [2]中国地质科学院水文地质环境地质研究所,正定050803

出　　处：《水文地质工程地质》2010年第3期116-121,共6页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(40702059);湖北省自然科学基金资助项目(2007ABA148)

摘　　要：三峡库区大型的赵树岭滑坡区滑坡灾害极为发育。三峡工程蓄水后,水位上升导致原先许多非饱水的松散岩土体处于饱水状态,严重破坏了其稳定性。文章针对该滑坡区内广泛分布的松散岩土的基本类型和特点,设计了4种不同的浸泡环境,进行水-松散岩土相互作用的室内控制试验,通过监测阴离子浸出特征来揭示其化学变化规律。试验结果表明:在不同的pH值、不同的搅拌速度、不同的流速、以及同时改变pH值和搅拌速度的试验环境中,水岩化学作用所浸出的阴离子特征各异。研究结果可以为松散岩土-水化学作用机理研究提供资料,也对赵树岭滑坡体的工程治理具有重要指导意义。Landslides composed of loose rock occur frequently in the Badong area of the Three Gorges Reservoir. After the usage of the Three Gorges Projects,a lot of unsaturated unconsolidated rocks and soil are in the saturated state as the water level rises,which leads to the decline in the stability of the rocks and soil. The basic types and characteristics of the unconsolidated rocks and soil distributed in the landslide district are analyzed in this paper and four different immersion environments are designed for experiment studies of the anion leaching characteristics of loose rocks. The purpose of this research is to offer the materials for the study of unconsolidated rock-water chemical interaction mechanism. The research results are of important theoretical interest to the engineering treatment of the Zhaoshuling landslide. The test result shows that in different pH,different mixing speeds,different cycle speeds,and with the changes in pH and mixing speeds in the same testing environment,the anion leaching characteristics of the loose rocks are different.

关 键 词：松散岩土体 水岩相互化学作用 浸出特征 阴离子 

分 类 号：P642.22[天文地球—工程地质学] TU411.1[天文地球—地质矿产勘探]