西北水电Issue(4)：33-37,5.DOI:10.3969/j.issn.1006-2610.2024.04.006
基于化学分散机制理论对分散性土的改性试验研究
Experimental Study on Modification of Dispersed Soil based on Chemical Dispersion Mechanism Theory
摘要
Abstract
Dispersed soil is widely distributed in northwest and northeast China.Due to environmental restrictions,many new water conservancy and hydropower projects have to choose dispersed soil as the anti-seepage material for the dam core wall.Due to its low anti-erosion ability,it is easy to cause dam pipe surge and roadbed instability.Therefore,how to improve its dispersion has become an urgent problem to be solved in the current water conservancy and hydropower project construction.In order to find out the modification effect and mechanism of dispersed soil,based on the theory of chemical dispersion mechanism,the modified test of MgO,CaO,MgCl2 and CaCl2 is carried out on the dispersed anti-seepage soil of a water conser-vancy project in Tibet,and the modified content range of the soil is 0.15%～1.50% .The results show that MgO at various contents basically has no modification function.When the content of CaO,MgCl2 and CaCl2 reaches 1%,the results of pinhole test,fragment test and pore water cation test all show that it is modified to non-dispersed soil,and the modification effect is favorable.Considering the operability,economy and influence of soil prop-erties and structure of on-site construction,it is recommended to use 1% MgCl2 to modify the dispersed anti-seepage soil on site.关键词
分散性土/改性试验/化学分散机制/针孔试验/碎块试验/孔隙水阳离子试验Key words
dispersed soil/modification test/chemical dispersion mechanism/pinhole test/fragment test/pore water cation test分类
土木建筑引用本文复制引用
何静斌,杨凌云,常玉鹏,崔家全,贺晶晶,陈楠,崔家铭..基于化学分散机制理论对分散性土的改性试验研究[J].西北水电,2024,(4):33-37,5.基金项目
国家自然科学基金项目(5207090694). （5207090694）
