甘肃黑方台静态液化型黄土滑坡滑距预测模型
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摘要
黑方台位于中国甘肃省永靖县,长年的农业灌溉使其台塬边发育了大量的黄土滑坡,其中突出一类为静态液化型黄土滑坡,具有运动距离远,危害性大的特点。文章结合运用摄影测量技术与统计分析方法,研究了静态液化型黄土滑坡的基本特征参数,建立了滑坡体积、滑坡后退距离和堆积体平均宽度的关系。利用滑坡形成的泥流屈服应力获得了坡度与滑坡堆积体淤积厚度的关系。以滑坡后退距离和前缘坡体平均坡度两个简单参数建立了黑方台静态液化型黄土滑坡的滑距预测模型,具有较好的适用性。
Heifangtai is located in Yongjing County,Gansu Province,China. A large number of loess landslides have been developed on the edge of the tableland due to the agricultural irrigation for many years,among which a kind of static liquefaction loess landslide is prominent with the characteristic of long movement distance and big harmfulness. In this paper,the basic characteristic parameters of static liquefaction loess landslide are studied by means of photogrammetry and statistical analysis,and the relationship among landslide volume,landslide backward distance and the average width of accumulation body is established. Yield stress of mudflow formed by landslide was used to obtain the relationship between slope and deposition thickness of landslide. The sliding distance prediction model of static liquefaction loess landslide with black square platform is established by using two simple parameters,namely the back distance of landslide and the average slope of front slope,which have good applicability.
Heifangtai is located in Yongjing County,Gansu Province,China. A large number of loess landslides have been developed on the edge of the tableland due to the agricultural irrigation for many years,among which a kind of static liquefaction loess landslide is prominent with the characteristic of long movement distance and big harmfulness. In this paper,the basic characteristic parameters of static liquefaction loess landslide are studied by means of photogrammetry and statistical analysis,and the relationship among landslide volume,landslide backward distance and the average width of accumulation body is established. Yield stress of mudflow formed by landslide was used to obtain the relationship between slope and deposition thickness of landslide. The sliding distance prediction model of static liquefaction loess landslide with black square platform is established by using two simple parameters,namely the back distance of landslide and the average slope of front slope,which have good applicability.
引文
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[13]武彩霞,许领,戴福初,等.黑方台黄土泥流滑坡及发生机制研究[J].岩土力学,2011,32(6):1767-1773.
[14]彭大雷,许强,董秀军,等.无人机低空摄影测量在黄土滑坡调查评估中的应用[J].地球科学进展,2017,32(3):319-330.
[2]董书宁,李保雄.黄土滑坡的空间预报[J].煤田地质与勘探,2000,28(6):46-47.
[3]LO C M,LIN M L,TANG C L,et al.A kinematic model of the Hsiaolin landslide calibrated to the morphology of the landslide deposit[J].Engineering Geology,2011,123(1):22-391.
[4]WEIWEI ZHAN,XUANMEI FAN,RUNQIUHUANG,et al.Empirical prediction for travel distance of channelized rock avalanches in the Wenchuan earthquake area[J].Natural Hazards&Earth System Sciences,2017,17:833-844.
[5]GUO D,HAMADA M,HE C,et al.An empirical model for landslide travel distance prediction in Wenchuan earth quake area[J].Landslides,2014,11(2):281-291.
[6]王念秦,张倬元,王家鼎.一种典型黄土滑坡的滑距预测方法[J].西北大学学报:自然科学版,2003,33(1):111-114.
[7]HUNGR O.Numerical modelling of the motion of rapid,flow-like landslides for hazard assessment[J].Journal of Civil Engineering,2009,13(4):281-287.
[8]STRAUB S.Predictability of long runout landslide motion:implications from granular flow mechanics[J].Geologische Rundschau,1997,86(2):415-425.
[9]章健.黄土滑坡运动模式及滑距预测方法研究[D].西安:长安大学,2008.
[10]魏丽娟.黑方台黄土滑坡成因与滑距分析[D].兰州:兰州大学,2012.
[11]QI X,XU Q,LIU F.Analysis of retrogressive loess flowslides in Heifangtai,China[J].Engineering Geology,2017.Doi:10.1016/j.enggeo.2017,08,028.
[12]XU L,DAI F,TU X,et al.Landslides in a loess platform,North-West China[J].Landslides,2014,11(6):993-1005.
[13]武彩霞,许领,戴福初,等.黑方台黄土泥流滑坡及发生机制研究[J].岩土力学,2011,32(6):1767-1773.
[14]彭大雷,许强,董秀军,等.无人机低空摄影测量在黄土滑坡调查评估中的应用[J].地球科学进展,2017,32(3):319-330.