【摘要】：新疆伊犁谷地黃土廣泛分布,黃土滑坡災(zāi)害嚴(yán)重,其數(shù)量占新疆全區(qū)滑坡的80%,其中大型黃土滑坡-泥石流災(zāi)害鏈造成的損失尤為顯著。與我國西部典型黃土斜坡相比,伊犁谷地黃土斜坡具有坡體結(jié)構(gòu)復(fù)雜和降雨非飽和滲流失穩(wěn)的特征,黃土滑坡降雨誘發(fā)機(jī)制復(fù)雜。以新源縣則克臺加朗普特大型滑坡泥石流災(zāi)害為例,在建立黃土滑坡坡體結(jié)構(gòu)模型的基礎(chǔ)上,基于非飽和滲流理論,計算分析坡體非飽和滲流場變化,研究降雨誘發(fā)黃土坡體結(jié)構(gòu)滲流破壞過程與機(jī)制,采用滲流-穩(wěn)定性耦合計算方法,分析非飽和滲透誘發(fā)坡體結(jié)構(gòu)失穩(wěn)過程,揭示新疆伊犁谷地大型黃土滑坡降雨非飽和滲流失穩(wěn)機(jī)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.
【作者單位】： 中國科學(xué)院地質(zhì)與地球物理研究所中國科學(xué)院頁巖氣與地質(zhì)工程重點(diǎn)實驗室;中國科學(xué)院大學(xué)地球科學(xué)學(xué)院;新疆維吾爾自治區(qū)地質(zhì)環(huán)境監(jiān)測院;華北水利水電大學(xué);
【基金】：新疆國土資源廳科研項目(XJDZFZ-XX2013) 國家自然科學(xué)基金(41202217)資助
【分類號】：P642.2

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