张艳玲,陈亮,闫金凯,高杨.基于DAN-W模型的高速远程滑坡灾变过程分析[J].西北地质,2021,54(1):204-211 ZHANG Yanling,CHENG Liang,YAN Jinkai,GAO Yang.Study on the Catastrophic Process of Rapid and Long Run-out Landslides Based on DAN-W[J].Northwestern Geology,2021,54(1):204-211
基于DAN-W模型的高速远程滑坡灾变过程分析
Study on the Catastrophic Process of Rapid and Long Run-out Landslides Based on DAN-W
投稿时间:2020-04-15  修订日期:2020-09-27
DOI:10.19751/j.cnki.61-1149/p.2021.01.018
中文关键词:  高速远程滑坡;灾变过程;数值模拟;DAN-W
英文关键词:rapid and long run-out landslide;catastrophic process;numerical simulation;DAN-W
基金项目:自然资源部国家级地质环境监测与预报项目“哀牢山地区地质灾害监测预警”(121201014000150003-3),中国地质调查局地质调查类项目“全国地质灾害数据更新与服务”(DD20190638)
作者单位E-mail
张艳玲 中国地质环境监测院, 北京 100081  
陈亮 中国地质环境监测院, 北京 100081 chenl@cigem.cn 
闫金凯 中国地质科学院, 北京 100037  
高杨 中国地质科学院地质力学研究所, 北京 100081  
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中文摘要:
      高速远程滑坡因其突发性、剧烈性、高速性、远程性等特点对人员和财产造成重大危害,是中国最严重的地质灾害类型之一,研究其灾变过程对中国防灾减灾具有重要的意义。DAN-W是基于拉格朗日有限差分法建立的动力模拟方法,反演模拟碎屑流运动过程,更适合高速远程滑坡的模拟分析。笔者以哀牢山地区芭蕉树滑坡为研究对象,研究芭蕉树滑坡的基本特征,利用DAN-W软件建立芭蕉树滑坡的计算模型,分析滑坡的灾变过程,依据滑坡特征考虑滑坡分区和铲刮效应,将滑动路径分为3段:滑源段、铲刮段、堆积段进行模拟计算;结果显示:滑坡前缘最大速度为26 m/s,后缘最大速度为30 m/s,后缘最大速度发生在剪出口位置,最大滑距为420 m,滑动14 s后滑体基本滑离剪出口,至运动30 s时停止滑动。所得结果与实际情况吻合度高。
英文摘要:
      Rapid and long run-out landslides, one of the most serious geological hazards in China, caused great damage due to its sudden, violent, high speed and long run-out characteristics. Therefore, it is of great significance to study the catastrophic process for prevention and mitigation of the hazard. DAN-W is a dissipative particle dynamics based on Lagrangian finite-difference and inverse simulation of the detrital flow process. This paper studies the characteristics of the Banana-Tree Landslide in Ailao mountain area. DAN-W was used to establish the calculation model and analyze the catastrophe process. The slide path was divided into three segments:sliding source segment, scraper segment and accumulation segment, according to landslide zoning and scraping effect. The results showed that the maximum speed of frontal part was 26m/s, the frontal rear part was 30m/s at the shear exit; the maximum slip distance was 420m, sliding off shear outlet after 14s, and stopped after 30s. The results are consistent with the actual situation.
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