山西临县黄土边坡变形破坏类型及机理分析  

Analysis of Damage Forms and Mechanism of Loess Slope in Lin Xian of Shanxi Province

作　　者：占样烈[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《路基工程》2013年第6期102-105,108,共5页Subgrade Engineering

摘　　要：山西临县地区黄土具有含水率低、孔隙发育、易溶盐含量高、湿陷性等级高、抗剪强度低的特点。在此基础上对该地区的黄土边坡变形破坏类型进行研究,发现该地区的边坡破坏类型主要有边坡剥落、坡面冲刷、黄土崩塌、黄土滑坡,并对它们的破坏机理进行分析,得出该地区黄土所具有的含水率低、孔隙发育、易溶盐含量高、湿陷性等级高、抗剪强度低的特点为边坡变形破坏提供了条件,广泛发育的落水洞、节理裂隙等不良地质现象破坏了边坡的完整性,成为水流冲蚀的优势通道,影响了边坡的稳定性。The loess in the region of Linxian County, Shanxi has the characteristics of low water content, porosity development, high soluble salt content, high grade of collapsibility, and low shearing strength, based on which the deformation failure forms of the loess slope in this region were studied. It was found that the forms include spalling of sloping surfaces, erosion of sloping surfaces, loess collapse and loess landslide; and the failure mechanism was analyzed. As a result, it is concluded that the characteristics of the loess, including low water content, porosity development, high soluble salt content, high grade of collapsibility, and low shearing strength, facilitate the deformation failure of the slope, in addition, the extensively developed bad geological phenomena, such as sinkhole and joint fissure, break down the completeness of the slope, which become preferable channel of water erosion and affect the slope stability.

关 键 词：黄土边坡 变形破坏类型 破坏机理 

分 类 号：U416.16[交通运输工程—道路与铁道工程]