基于崩塌滚石运动特征的防护网动态响应规律

马显东; 周剑; 张路青; 黄福有; 李蕊瑞

doi:10.3799/dqkx.2022.326

Volume 47 Issue 12

Dec. 2022

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Article Navigation > Earth Science > 2022 > 47(12): 4559-4573

Ma Xiandong, Zhou Jian, Zhang Luqing, Huang Fuyou, Li Ruirui, 2022. Dynamic Response Laws of Flexible Rockfall Barriers Based on Movement Characteristics of Rockfall. Earth Science, 47(12): 4559-4573. doi: 10.3799/dqkx.2022.326

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Ma Xiandong, Zhou Jian, Zhang Luqing, Huang Fuyou, Li Ruirui, 2022. Dynamic Response Laws of Flexible Rockfall Barriers Based on Movement Characteristics of Rockfall. Earth Science, 47(12): 4559-4573. doi: 10.3799/dqkx.2022.326

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Dynamic Response Laws of Flexible Rockfall Barriers Based on Movement Characteristics of Rockfall

doi: 10.3799/dqkx.2022.326

Ma Xiandong^{1, 2
,},
Zhou Jian^{3
,
,},
Zhang Luqing¹,
Huang Fuyou^{1, 2},
Li Ruirui^{1, 2}

1.
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2.
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
3.
Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

Received Date: 2021-06-30
Available Online: 2023-01-10
Publish Date: 2022-12-25

Abstract

Abstract

In order to obtain the dynamic response laws of the flexible rockfall barriers under different rockfall movement characteristics, taking the site where the flexible barriers were damaged by rockfall after the Ludian 803 earthquake as an example, the geological survey was carried out through the UAV tilt photogrammetry technology, Rockyfor3D was used to obtain the movement characteristics of the rockfall in the study area. And through the finite element model, the dynamic response laws of the flexible barrier under different rockfall impact forms are studied. The research shows that the bounce heights of rockfall in the area is generally between 1-2 m, and the rockfall on the dominant path will form a scale impact with slightly high speed and low bouncing. Under the scale rockfall impact, the maximum tensile force of the flexible barrier rope can be increased by 123.7%; under the low-bounce rockfall impact, the maximum tensile force of the rope can be increased by 181.2%. The scale rockfall impact will reduce the energy consumption of the flexible barrier net and lead to the increase of the tensile force of the upslope anchor rope. The lower primary support rope of the flexible barrier is more sensitive to the response of different rockfall bounce heights, some high-bounce rockfall will affect the upslope anchor rope and the upper primary support rope.
- strong earthquake area,
- rockfall,
- UAV tilt photogrammetry technology,
- Rockyfor3D,
- movement characteristics,
- flexible rockfall barrier,
- engineering geology

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References(54)

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Dynamic Response Laws of Flexible Rockfall Barriers Based on Movement Characteristics of Rockfall

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