人民长江Issue(3)：1-4,26,5.DOI:10.16232/j.cnki.1001-4179.2015.03.001
南水北调中线膨胀土边坡变形破坏类型及处理
Failure types of expansive soil slope in Middle Route Project of South-to-North Water Diversion and its treatment
摘要
Abstract
There existed 387 km long expansive soil along the Middle Route Project of South-to-North Water Diversion, and more than 100 landslides of certain scale occurred during the construction period. Through detail analysis of massive landslides, deformation monitoring and in-situ test of water physical-chemical index of the soil body, two main types of slope failures are revealed, namely the shallow expansive-contraction creep and the deep structural interface-controlled sliding. The surface lay-er substitution by cement-improved expansive soil was applied to prevent the reformation action from atmospheric environment;the surface water cutoff combined with underground drainage measures could mitigate the adverse influence of water on soil body and the structural interface. Aiming to the slope structure with long and large low-angle interfaces or soft interlayer, the anti-sliding structural measures should be used to avoid the sliding along the structure plane and maintain the long-term stability of the channel.关键词
膨胀土边坡/破坏类型/渠道边坡/南水北调中线工程Key words
expansive soil slope/failure type/channel slope/South-to-North Water Diversion分类
天文与地球科学引用本文复制引用
钮新强,蔡耀军,谢向荣,阳云华,冷星火..南水北调中线膨胀土边坡变形破坏类型及处理[J].人民长江,2015,(3):1-4,26,5.基金项目
国家“十二五”科技支撑计划项目“施工期膨胀土开挖边坡稳定性预测技术”(2011BAB10B01) （2011BAB10B01）
