摘要
文章利用高分辨率激光粒度仪MS2000对我国典型地区5种沉积类型滑坡的滑带(面)土和滑坡细粒堆积物的粒度多组分分布特征进行了系统、深入研究,总结了不同沉积类型滑坡滑带(面)土与滑坡堆积物的粒度多组分分布特征及差异性,其对于认识滑坡的成因机制具有重要的理论和实践意义。研究认为:(1)不同沉积类型的滑坡滑带(面)土和滑坡堆积物的粒度一般含有4个组分,其分别为风成的细、中、粗粒组分和水成的悬浮组分;(2)不同地区不同沉积类型的滑坡其滑带(面)土粒度与滑坡堆积物的粒度多组分具有不同的分布特征;(3)同一地区滑坡的滑带(面)土与滑坡堆积物的粒度多组分分布特征有较大差异,主要受控于滑坡本身的形成演化过程。
This paper mainly examines the characteristics of the multi-model grain size distribution of slip surface soils and fine-grained deposits of landslides. It uses the high-resolution laser grain size analyzer MS2000 in five typ- ical sedimentary areas of China. Then It summarizes the characteristics between the discrepancies of different types of slip surface soils and landslide deposits. The characteristics have important theoretical and practical significances for understanding the formation of landslide mechanism. The test results show that ： 1 ） There are at most four mod- els （ median size are 〈 1 μm, 1 ～ 100μm, 10 ～ 100μm, 100 ～ 500μm, respectively） that are superimposed to consti- tute of landslide slip surface soil and the deposits in the different types of sedimentary areas. The characteristics of multi-models grain size distribution are the fine, median and coarse grain of suspension and saltation. 2 ） Different types of landslides slip surface soils and the deposits can have significantly different characteristics of grain size dis-tribution. 3 ）the grain size discrepancy of landslides slip surface soils and the deposits in the same area can be con- trolled by the formation and evolution of landslides themselves.
出处
《工程地质学报》
CSCD
北大核心
2012年第6期998-1006,共9页
Journal of Engineering Geology
基金
国家自然科学青年基金项目(40802089)资助
关键词
滑坡
滑带土
粒度
多组分分布特征
Landslide, Slip surface soil, Grain size multi-model distribution characteristics, Laser grain size ana- lyzer
