基于DAN-W模型的高速远程滑坡灾变过程分析

张艳玲; 陈亮; 闫金凯; 高杨

doi:10.19751/j.cnki.61-1149/p.2021.01.018

基于DAN-W模型的高速远程滑坡灾变过程分析

张艳玲¹,
陈亮^1, ,,
闫金凯²,
高杨³

1. 中国地质环境监测院, 北京 100081;
2. 中国地质科学院, 北京 100037;
3. 中国地质科学院地质力学研究所, 北京 100081

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）

详细信息

作者简介:
张艳玲(1982-),女,工程师,主要从事地质灾害调查评价综合研究、地质灾害数据库管理及信息系统建设等工作。E-mail:zhangyl@cigem.cn

通讯作者:
陈亮(1983-),男,高级工程师,主要从事地质灾害调查评价监测预警综合研究工作。E-mail:chenl@cigem.cn

中图分类号: P694
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出版历程
- 收稿日期: 2020-04-14
- 修回日期: 2020-09-26
- 网络出版日期: 2022-07-28
- 发布日期: 2021-03-04

Study on the Catastrophic Process of Rapid and Long Run-out Landslides Based on DAN-W

1. China Institute of Geo-Environment Monitoring, Beijing 100081, China;
2. Chinese Academy of Geological Sciences, Beijing 100037, China;
3. Institute of Geo-mechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

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。
- 高速远程滑坡 /
- 灾变过程 /
- 数值模拟 /
- DAN-W
Abstract: 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.
- rapid and long run-out landslide /
- catastrophic process /
- numerical simulation /
- DAN-W

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