降雨入渗对邱家梁滑坡稳定性的影响研究
Analysis on the Influence of the Rainfall Infiltration on the Stability of Qiujialiang Landslide
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摘要: 以西安市周至县邱家梁滑坡为研究对象,通过详细分析该滑坡形态特征、地层岩性、滑体物质结构以及变形特征,采用边坡稳定性分析软件Geostudio中的SEEP/W模块和SLOPE/W模块进行耦合计算,对降雨入渗情况下坡体内非饱和渗流场的变化进行研究,探讨了不同降雨强度条件下滑坡体的稳定性变化情况。研究表明,影响滑坡稳定性的因素除地形、岩性等地质条件外,降雨为主要诱发因素,并且探讨了降雨强度、降雨持续时间与滑坡稳定性之间的相互关系。研究成果为客观评价该滑坡在降雨条件下的稳定性提供了科学依据。Abstract: Qiujialiang landslide of Zhouzhi county in Xi'an city is selected as the research object in this paper. In the detailed analysis of morphological characteristics, stratum lithology, material structure of landslide body and deformation features, the SEEP/W module and SLOPE/W module of the slope stability analysis software Geostudio are used for coupled calculation. The change of unsaturated seepage field in the slope body under the condition of rain infiltration is studied. The change of landslide stability under different rainfall intensity is discussed. The results show that besides topography, lithology and other geologic conditions, rainfall is the main inducing factors affecting landslide stability. The relationship among rainfall intensity, rainfall duration and landslide stability is also studied. The research results can provide a scientific basis for objectively evaluating the landslide stability under the condition of rainfall.
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Key words:
- rainfall infiltration /
- seepage field /
- landslide stability /
- numerical analysis
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