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首页> 外文期刊>Landslides >Dynamic characteristics of high-elevation and long-runout landslides in the Emeishan basalt area: a case study of the Shuicheng '7.23'landslide in Guizhou, China
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Dynamic characteristics of high-elevation and long-runout landslides in the Emeishan basalt area: a case study of the Shuicheng '7.23'landslide in Guizhou, China

机译：峨眉山玄武岩地区高度高度和长跳闸滑坡的动态特征 - 以贵州贵州的水城“7.23”案例研究

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摘要

On July 23, 2019, a catastrophic high-elevation and long-runout landslide occurred in Shuicheng County, Guizhou Province, the karst mountainous area of southwestern China, causing the death of 51 people and the destruction and burial of 21 houses. The landslide movement consisted of a three-stage chain disaster that included landslide instability, impact and scraping, and debris flow deposit. A field investigation, unmanned aerial vehicle(UAV) image analysis, and dynamic analysis determined that this landslide had the following main characteristics: (1) initiated at high elevation, the elevation difference between the landslide front and the toe of surface of rupture was 340 m, and the horizontal sliding distance was 1360 m, categorizing this landslide as a high elevation and long runout; (2) induced by heavy rainfall, there was no notable sign of pre-landslide deformation but catastrophic events occurred, suggesting heavy rainfall as the main inducing factor for landslide failure; (3) significant entrainment effect, the volume of the sliding body was 70 x 10(4) m(3), and the deposit volume reached 200 x 10(4) m(3), and the impact and scraping characteristics were remarkable, enlarging the scale of the landslide disaster and increasing the difficulty of the rescue effort; and (4) extremely high fluidity, the basalt fragments and quaternary clay were fully and evenly mixed, reflecting the turbulent characteristics and super high mobility of the sliding body during the movement. To date, multiple high-elevation and long-runout landslides of Emeishan basalt have been recorded in the southwestern mountainous area of China, causing enormous casualties. Research establishing early identification and risk zoning methods for high-elevation landslides in the Emeishan basalt mountainous area should take into account the effects of landslide impact, scraping, and the disintegration effect during collision, and further research should be conducted into the post-failure dynamics of high-elevation and long-runout landslides.
机译：2019年7月23日，贵州省水城县灾难性高海拔和长跑车滑坡发生在中国西南喀斯特山区，造成51人死亡，毁灭和埋葬了21所房屋。滑坡运动包括三级连锁灾害，包括滑坡不稳定性，影响和刮擦，以及碎片流量押金。现场调查，无人驾驶飞行器（UAV）图像分析和动态分析确定，这种滑坡具有以下主要特点：（1）在高仰角开始，山体滑坡前沿与破裂表面的脚趾之间的高度差异为340 M，水平滑动距离为1360米，将这种滑坡分类为高度高度和长跳动; （2）大雨诱导，山上最大变形的显着迹象，但发生了灾难性事件，提出大雨降雨作为滑坡失效的主要诱导因素; （3）显着的夹带效果，滑动体的体积为70×10（4）米（3），沉积体积达到200×10（4）米（3），并且抗冲击特性是显着的，扩大滑坡灾害的规模，增加救援努力的难度; （4）极高的流动性，玄武岩片段和季粘土完全均匀地混合，反映了在运动期间滑动体的湍流特性和超高迁移率。迄今为止，在中国西南部山区的峨眉山玄武岩的多个高度高度和长跑车山体滑坡造成了巨大的伤亡。建立早期识别和风险分区的高仰视山地山区山地地区的风险分区方法应考虑到滑坡冲击，刮擦和崩解效应的影响，以及进一步的研究应进入失败后动态高度高度和长跳闸山体滑坡。

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