摘要
以四川盆地遂宁组紫色页岩为研究对象,对其崩解破坏过程和颗粒组成特点进行研究,同时研究其坡积物的持水性和抗冲性．结果表明,遂宁组紫色页岩随着崩解过程的进行,大粒径颗粒含量呈迅速减少趋势,而小粒径颗粒含量相对增加,经过4次崩解后,大于5 mm粒径颗粒含量仅为总颗粒含量的14．3%;坡积物饱和含水量随粒径的减少而增大;随粒径增加,坡积物失水速度增加,回润能力变弱;同一粒径坡积物随坡度增加,抗冲性降低;不同台位耕作土从坡上至坡下小粒径颗粒含量增多趋势明显．
Samples of purple shale developed from Suining group （J3s） in Sichuan Basin were taken to study their cracking processes and particle composition, and the water-holding capacities and anti-scourabilities of their alluvial soil were analyzed. The content of large particles decreased drastically with the development of the cracking process. After the 4th process, their contents was reduced to 14.3% of the total. Saturated water-holding capacity of the alluvial soil increased as the particle diameter increased. Small-diameter particle tended to increase from the upper slope to the lower slope.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第1期48-52,共5页
Journal of Southwest University(Natural Science Edition)
基金
国家科技部"十五"科技攻关计划资助项目(2004 BA 604 A 05)
国家自然科学基金(40671115)
重庆市自然科学基金(9219).
关键词
紫色页岩
遂宁组
颗粒组成
持水性
抗冲性
purple shale
Suining group
particle composition
water-holding capacity
anti-scourability
