三峡库区黄土坡临江滑坡体水岩(土)相互作用机理  

Water-rock(soil) interaction mechanism of Huangtupo riverside landslide in Three Gorges Reservoir

作　　者：江洎洧[1,2,3] 项伟[1] 曾雯[1] JOACHIM Rohn 姚远[1] 

机构地区：[1]中国地质大学教育部长江三峡库区地质灾害研究中心,湖北武汉430074 [2]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010 [3]Department of Applied Geology,University Erlangen-Nuremberg Erlangen,germany91054

出　　处：《岩土工程学报》2012年第7期1209-1216,共8页Chinese Journal of Geotechnical Engineering

基　　金："十一五"国家科技支撑计划项目(2008BAC47B0X);国家自然科学基金资助项目(40972185)

摘　　要：水岩(土)相互作用与滑坡地质灾害的形成密切相关。选取仍处于变形阶段的三峡库区黄土坡临江滑坡体为研究对象,以从滑坡不同部位采集的8类滑坡不良地质体(包括滑带土、软弱层、软岩等)为研究样本,追踪测试各样本的矿物类型及含量、化学组分及颗粒级配等指标。经分析,各类不良地质体之间具有明显的同源性特征,在水岩(土)相互作用下,主要滑坡不良地质体的成因及转化过程得以清晰呈现。随后,另取主滑带附近垂直方向上的岩土体样本为例,结合试验数据,深入分析并直观展现了水岩(土)相互作用对岩土体微观结构和力学性能弱化的影响。本研究深入探讨了黄土坡临江滑坡体中的水岩(土)相互作用机理,研究成果对于了解相似滑坡灾害的形成过程和有针对性制定滑坡防治方案具有重要参考价值。The water-rock （soil） interaction is closely related to the formation of landslides hazards. Huangtupo riverside landslide, which locates in the district of Three Gorges Reservoir, and is still in the process of intense deformation, is chosen as the research landslide. 8 kinds of unfavorable geologic bodies （including soft rock layer, sliding soil and weak intercalation） are collected from different parts of the landslide, and these samples are employed to track and test the mineral type and content, chemical composition and particle size distribution and other indicators. After analysis, 8 kinds of unfavorable geologic bodies have an obvious homeology; and in the water-rock （soil） interaction, the formation and transformation processes of the main unfavorable geologic elements can be clearly presented. Afterward, based on a number of rock and soil samples collected near the main slip zone along the vertical direction and combined with test data, in-depth analysis and visual display of how the water-rock （soil） interaction affects rock and soil microstructure and weakens the mechanical properties are performed. The water-rock （soil） interaction mechanism of Huangtupo riverside landslide is studied in depth, and it can provide important references for finding out the formation process of similar landslide hazards and preparing landslide prevention programs.

关 键 词：三峡库区 水岩(土)相互作用 滑坡不良地质体 黏土矿物 同源性 

分 类 号：TU431[建筑科学—岩土工程]