Research progress on the formation mechanism and risk assessment method of river blocking induced by landslide

被引：0
作者：
Wu H. [1 ,2 ,3 ]
Nian T. [3 ]
Shan Z. [2 ]
机构：
[1] Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Sichuan, Chengdu
[2] PowerChina Huadong Engineering Corporation Limited, Zhejiang, Hangzhou
[3] School of Civil Engineering, Dalian University of Technology, Liaoning, Dalian
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷
基金：
中国国家自然科学基金;
关键词：
landslide dam; mechanism of river blocking; monitoring and early warning; risk assessment; slope engineering;
D O I：
10.13722/j.cnki.jrme.2022.0116
中图分类号：
学科分类号：
摘要：
In recent years, a large number of landslides blocking rivers induced by earthquake and extreme climate occurred frequently, seriously threatening the safety of people's life and property and infrastructure in the basin. However, the current understanding of the formation mechanism of landslides blocking river is still not comprehensive, which is worth further research. Based on typical cases of landslide blocking river since the 21st century, the general process and main characteristics of landslide blocking river are deeply analyzed. In view of large scale of landslide blocking river, the necessary conditions for the formation of landslide river blocking and the meso-mechanism of fluid-soil coupling in the process of river blocking are revealed from three aspects of theoretical analysis, physical model test and numerical simulation respectively. Hazard assessment of landslide blocking river mainly include distinguishing of river blocking, evaluation of the landslide dam stability and assessment of dam failure hazard. However, there is no unified standard form for distinguishing of river blocking. The material and structure characteristics of the landslide dam have not been considered in the stability evaluation of the dam. The physical mechanism of the mathematical model for predicting peak discharge of dam-break flood still needs to be further revealed. Based on the limitations of the current research, four key issues that should be focused on in the study of landslide blocking river are prospected:(1) Study on the accumulation structure and prediction model of landslide damming induced by debris-avalanche considering the influence of fragmentation; (2) Physical and numerical simulation methods of evolution process of landslide blocking river;(3) Hazard assessment method of landslide blocking river based on the state of landslide material;(4) Early warning factors and key monitoring and early warning technologies for landslide dams. The results provide useful reference for the prediction of landslide blocking river disaster chain, emergency geological treatment of landslide dam and regional disaster prevention and mitigation planning in mountain and ravine region. © 2023 Academia Sinica. All rights reserved.
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页码：3192 / 3205
页数：13
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