Characteristics and failure mechanism of the Jiangliu 4# landslide in the southern tableland in Jingyang County
-
摘要: 2016年3月6日，泾阳南塬蒋刘村发生了约2×104 m3的小型黄土滑坡。滑坡发生后，在对滑坡现场进行详细的地质调查基础上，结合无人机航测和三维激光扫描综合手段，对滑坡的基本特征及成因机理进行了初步分析。结果表明：长期引水灌溉是滑坡发生的基本条件；坡脚滞水软化作用、与灌溉渠较短的渗透距离、坡脚冻结黄土春季解冻是导致滑体发生的直接原因；底部饱和泥化黄土的铺垫及导流作用，是导致其滑程较远的根本原因。该类滑坡近几年来发生频率较高，为泾阳南塬滑坡演化后期的主要发生类型，具有一定的特殊性，值得深入研究。Abstract: On March 6, 2016, a small-scale loess landslide with an estimated volume of 2×104 m3 occurred in the Jiangliu village in the southern tableland of Jingyang county. Based on the site geological investigation, combined with the low-altitude photogrammetry and 3D laser scanning, the basic characteristics and the failure mechanism of the landslide is analyzed. The results show that the agricultural irrigation are the fundamental conditions for the landslide. The softening effect of water logged zone at the foot of slope, a shorter distance with the irrigation canal, and the spring thaw of the frozen loess directly caused the landslide. The cushion effect and guided function of the saturated loess at the bottom of the deposition are the main factor for the remote movement of the landslide. This kind of landslides frequently occurs in recent years. It is the main type of loess landslide evolution at its late stage. This kind of landslides is special and usual and they are worthy of examining a further study.
-
Key words:
- loess landslide /
- freeze-thaw action /
- distance of water infiltration /
- Jingyang
-
-
计量
- 文章访问数: 1358
- PDF下载数: 3
- 施引文献: 0
下载: