新疆伊犁加朗普特黄土滑坡泥石流降雨诱发机理

发布时间：2018-09-04 18:13

【摘要】：新疆伊犁谷地黄土广泛分布,黄土滑坡灾害严重,其数量占新疆全区滑坡的80%,其中大型黄土滑坡-泥石流灾害链造成的损失尤为显著。与我国西部典型黄土斜坡相比,伊犁谷地黄土斜坡具有坡体结构复杂和降雨非饱和渗流失稳的特征,黄土滑坡降雨诱发机制复杂。以新源县则克台加朗普特大型滑坡泥石流灾害为例,在建立黄土滑坡坡体结构模型的基础上,基于非饱和渗流理论,计算分析坡体非饱和渗流场变化,研究降雨诱发黄土坡体结构渗流破坏过程与机制,采用渗流-稳定性耦合计算方法,分析非饱和渗透诱发坡体结构失稳过程,揭示新疆伊犁谷地大型黄土滑坡降雨非饱和渗流失稳机理。
[Abstract]:Loess is widely distributed in Yili Valley, Xinjiang, and the loess landslide disaster is serious, which accounts for 80% of the landslide in Xinjiang, especially the loss caused by large-scale loess landslide-debris flow disaster chain. Compared with the typical loess slope in western China, the loess slope in Yili Valley has the characteristics of complex slope structure and unstable rainfall unsaturated seepage flow, and the mechanism of rainfall induced by loess landslide is complex. Taking the large scale landslide and debris flow disaster in Zaikejia Langpute, Xinyuan County as an example, on the basis of establishing the slope structure model of loess landslide and based on unsaturated seepage theory, the variation of unsaturated seepage field of slope body is calculated and analyzed. The seepage failure process and mechanism of the loess slope structure induced by rainfall are studied. The seepage stability coupling calculation method is used to analyze the instability process of the slope structure induced by unsaturated infiltration. The mechanism of rainfall unsaturated seepage instability of large loess landslide in Yili valley Xinjiang is revealed.
【作者单位】：中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室;中国科学院大学地球科学学院;新疆维吾尔自治区地质环境监测院;华北水利水电大学;
【基金】：新疆国土资源厅科研项目(XJDZFZ-XX2013) 国家自然科学基金(41202217)资助
【分类号】：P642.2

【相似文献】