管道漏水引起黄土滑坡失稳机理研究

2011年3月2号,甘肃东乡县城发生重大地质灾害——滑坡,威胁县城2/3安全。通过对东乡县城"3.2"滑坡的现场勘察,分析了滑坡的发育特征,并对非饱和黄土进行土水特征曲线吸湿测试,运用饱和非饱和渗流理论,进行了管道漏水滑坡渗流场模拟,探讨了管道漏水引起的黄土滑坡渗流场变化规律。最后,对原始边坡与管道漏水边坡的稳定性进行了对比,认为管道漏水是滑坡发生的诱发因素。

Study on the Instability Mechanism of Loess Landslide Caused by Pipeline Leakage

A major geological disaster of landslide happened in Dongxiang County of Gansu Province on March 2nd, 2011, which threatened the safety of two thirds of the total population. The landslide survey was performed to analyze the development characteristics of landslide. The moisture absorption of soil-water characteristic curve test was conducted on the unsaturated loess, and the seepage field of landslide caused by the pipeline leakage was simulated based on the saturated and unsaturated theory. The variation of seepage field of loess landslide caused by the pipeline leakage was analyzed. Finally, the original slope stability was compared with and the slope stability caused by the pipeline leakage, which confirmed that the pipeline leakage induces loess landslide.