黄土不稳定斜坡稳定性评价及后续趋势分析  

Stability evaluation and subsequent trend analysis of unstable loess slopes

作　　者：蒋国良 刘阳阳 拉换才让 耿海深 Jiang Guoliang;Liu Yangyang;La Huancairang;Geng Haishen(Qinghai Hydrogeology&Engineering Geology&Environgeology Survey Institute,Xining 810008,China;Hydrogeological&Geothermal Geological Key Laboratory of Qinghai Province,Xining 810008,China)

机构地区：[1]青海省水文地质工程地质环境地质调查院,西宁810008 [2]青海省水文地质及地热地质重点实验室,西宁810008

出　　处：《黑龙江科技大学学报》2024年第3期433-439,445,共8页Journal of Heilongjiang University of Science And Technology

摘　　要：为有效评价不稳定斜坡的稳定性及其后续趋势,结合不稳定斜坡所处地质条件,利用传递系数法开展了不稳定斜坡的稳定性初步评价,通过非趋势波动分析方法和变形预测综合分析不稳定斜坡稳定性的后续趋势。结果表明:不稳定性斜坡稳定性由南至北逐步变差,尤其北侧局部具不稳定现状特征;不稳定性斜坡的累积变形后续具增加特征,但增加速率的趋势性存在较大差异,其中,BC3监测点还具加速变形特征,其余3个监测点具收敛趋势;经变形预测结果统计,除BC3监测点的后续变形具加速特征外,其余3个监测点的后续变形均具收敛趋势,此结果与DFA分析结果较为一致,因此,不稳定斜坡后续稳定性存在局部变差特征,需尽快开展治理工作。This paper aims to effectively evaluate the stability and subsequent trends of the unstable slopes.Combined with the geological conditions of the unstable slope,the study firstly uses the transfer coefficient method to conduct a preliminary evaluation of the stability of the unstable slope,then comprehensively analyzes the subsequent trends of the stability of the unstable slope through non trend fluctuation analysis methods and deformation prediction.The results indicate that the stability of unstable slopes gradually deteriorates from south to north,and the local unstable characteristics appears on the north side.At the same time,the cumulative deformation of unstable slopes exhibits an increasing trend,but there are significant differences in the trend of the increase rate,among which the BC3 monitoring point also has an accelerated deformation feature,while the other three monitoring points have a convergence trend.According to the deformation prediction results,except for the acceleration characteristics of the subsequent deformation at BC3 monitoring point,the subsequent deformation at the other three monitoring points has a convergence trend,and this result is consistent with DFA analysis results.Therefore,there are local deterioration characteristics in the subsequent stability of the unstable slope,and the governance work needs to be carried out as soon as possible.

关 键 词：黄土 不稳定斜坡 传递系数法 变形预测 稳定性评价 

分 类 号：P642[天文地球—工程地质学]