摘要
通过碎块、双比重计、针孔、孔隙水可溶盐及交换性钠百分比等5种方法的土样分散性试验和渗透变形试验,对拟建的青海班多土石坝防渗心墙土样进行分散性鉴定及渗透稳定性试验研究。研究结果表明,虽然土样具有强分散性,但在合适的反滤料保护下,分散性土样仍具有较高的抗渗性能,裂缝土体也不会发生流失;在做好反滤层设计的前提下,用分散性土样作为防渗心墙的填筑土样是可行的。
The dispersibility and seepage stability of soil samples obtained from the clay core wall of Banduo earth-rock fill dam in Qinghai Province are studied by the chemical properties of soil analysis and the tests for identification of dispersive clay soils.The tests include double-hydrometer test,pinhole test,crumb test,the test to determine salt contents of pore water and percentage of exchangeable sodium,and seepage distortion tests.The experimental results are shown that the clay mineral is main granite with little montmorillonoid,but a great quantity of sodium-ion and higher pH value in granite soils making the soil intensively be dispersed.At the same time,the dispersive soils have largely filtration properties,so the soils in split are not easily washed away.The achieved results show that dispersive soil can be served as the clay core wall in earth dam under filter layers.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第A01期3316-3321,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
化学分析
分散性
渗透变形
裂缝冲刷
soil mechanics
chemical analysis
dispersibility
filtration erosion
split washout
