刚果(金)南部湿陷性土的分散性研究  

Study on dispersity of collapsible soils in southern Democratic Republic of the Congo

作　　者：陈括 郑宏 张诏飞 席伟 CHEN Kuo;ZHENG Hong;ZHANG Zhao-fei;XI Wei(Langfang Zhongtie Geophysical Prospecting Co.,Ltd,Langfang 065000,China;Central Laboratory of China Railway Resources Group Co.,Ltd,Langfang 065000,China)

机构地区：[1]廊坊市中铁物探勘察有限公司,河北廊坊065000 [2]中铁资源集团有限公司中心试验室,河北廊坊065000

出　　处：《佛山科学技术学院学报（自然科学版）》2022年第2期23-28,共6页Journal of Foshan University(Natural Science Edition)

基　　金：中国中铁股份有限公司科技开发重点科研课题资助(20-重点-01)。

摘　　要：通过野外调查,采用矿物成分、自行分散能力、碎块试验、孔隙水阳离子试验、交换钠离子百分比、经验公式及双比重计法等多种方法,从定性判别和定量分析角度,对取自刚果(金)南部地区不同矿山的湿陷性土试样进行分散性研究。结果表明,研究区域的湿陷性土虽在外观赏表现出与分散性土类似的鉴别特征;但其与分散性土在交换钠离子含量和土颗粒表面的电化学性质等方面有本质上的不同,判定为非分散性土。推测研究土体在短时急促降雨条件下,团粒之间的胶结被破坏,土体被冲散,外观上表现出空洞、冲沟等特征,与土体分散无关。对矿区建设中,湿陷性土的处理提供参考。Through field investigation,the dispersibility of collapsible soil samples from different mines in southern Democratic Republic of the Congo was studied from the perspective of qualitative discrimination and quantitative analysis by using various methods,such as mineral composition,self dispersion capacity,fragment test,pore water cationic test,exchange sodium ion percentage,empirical formula and double hydrometer method.The results showed that although the collapsible soil in the study area showed similar identification characteristics as the dispersed soil for ornamental purposes.However,the content of sodium ions exchanged between the soil and dispersed soil and the electrochemical properties of soil particles are essentially different,so it is considered as non-dispersed soil.It provides reference for the treatment of collapsible soil in mining area construction.

关 键 词：刚果(金)湿陷性土 分散性 定性判别 定量判别 

分 类 号：TU475.3[建筑科学—结构工程]