长江科学院院报2011，Vol.28Issue(7)：28-31,4.
库岸滑坡黏性土与河水物理化学作用试验研究
Physical and Chemical Reaction Between River Water and Clayey Soil from Reservoir Landslide
毕仁能 1项伟 2郭义 1李涛涛 1王菁莪1
作者信息
- 1. 中国地质大学(武汉)工程学院,武汉,430074
- 2. 中国地质大学(武汉)教育部长江三峡库区地质灾害研究中心,武汉,430074
- 折叠
摘要
Abstract
Water level fluctuation in reservoir intensifies the water-soil interaction between river water and loose soil of landslide deposit, and thereby profoundly affecting the engineering properties of surface rock-soil. The impact of river water on the engineering property of clayey soil at the reservoir bank is studied from the perspective of water-soil interaction. Contrast tests including X-ray diffraction, Zeta electric potential, exchangeable cation types, shear test for consolidated samples, and SEM are performed to study the change of components, microstructure and shear strength of clayey soil from landslide before and after the interaction. It is concluded that Zeta electric potential at the surface of soil particle decreases under the combined effect of hydration and cation absorption. The thickness of absorbed water of soil grains decreases, and the microstructure and shear strength of remoulded soil are somewhat varied as the cations absorb divalent cations to soil grains. Moreover, dilatancy effect is generated due to the change of soil particle structure in the shear test of water-treated clayey soil. The mechanism of water-soil interaction affecting on the engineering properties of fine-grained soil is finally revealed.关键词
水土作用/离子吸附/Zeta电位/抗剪强度/微结构Key words
water-soil interaction/ cation absorption/ Zeta potential/ shear strength/ microstructure分类
建筑与水利引用本文复制引用
毕仁能,项伟,郭义,李涛涛,王菁莪..库岸滑坡黏性土与河水物理化学作用试验研究[J].长江科学院院报,2011,28(7):28-31,4.
