青藏高原察达高速远程滑坡运动过程与形成机理

代欣然; 赵建军; 赖琪毅; 万勋; 陈柯宇; 王杜江

doi:10.3799/dqkx.2021.205

Volume 47 Issue 6

Jun. 2022

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Dai Xinran, Zhao Jianjun, Lai Qiyi, Wan Xun, Chen Keyu, Wang Dujiang, 2022. Movement Process and Formation Mechanism of Rock Avalanche in Chada, Tibet Plateau. Earth Science, 47(6): 1932-1944. doi: 10.3799/dqkx.2021.205

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Dai Xinran, Zhao Jianjun, Lai Qiyi, Wan Xun, Chen Keyu, Wang Dujiang, 2022. Movement Process and Formation Mechanism of Rock Avalanche in Chada, Tibet Plateau. Earth Science, 47(6): 1932-1944. doi: 10.3799/dqkx.2021.205

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Movement Process and Formation Mechanism of Rock Avalanche in Chada, Tibet Plateau

doi: 10.3799/dqkx.2021.205

Dai Xinran^{1
,
,},
Zhao Jianjun^{1
,
,
,},
Lai Qiyi¹,
Wan Xun¹,
Chen Keyu¹,
Wang Dujiang²

1.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu Univesity of Technology, Chengdu 610065, China
2.
China Railway First Survey and Design Institute Group Co., Ltd., Xi'an 710043, China

Received Date: 2021-08-13
Publish Date: 2022-06-25

Abstract

Abstract

To understand the kinetic mechanism of Chada rock avalanche in Tibet plateau, remote sensing mapping, UAV topographic mapping and field survey data are used to zone the rock avalanche and research the formation mechanism of the rock avalanche. PFC^2D numerical simulation is used to analyze the rock avalanche movement process under the seismic conditions simulation. The Chada rock avalanche can be divided into source zone, transition zone and accumulation zone. The average movement speed of this rock avalanche is 15-20 m/s. Its duration time is 150 s, and the maximum movement distance is 2 800 m. The Chada rock avalanche was induced by earthquake. The source zone rock mass scrapes and moves the trailing edge of the upper accumulation which resulting in the overall deformation of the upper accumulation. Its movement process can be divided into four stages: collapse → scraping → sliding → emplacement.
- rock avalanche,
- numerical simulation of PFC^2D,
- movement mechanism,
- engineering geology

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References(41)

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Movement Process and Formation Mechanism of Rock Avalanche in Chada, Tibet Plateau

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