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

被引：0
作者：
Ma X. [1 ,2 ]
Zhou J. [3 ]
Zhang L. [1 ]
Huang F. [1 ,2 ]
Li R. [1 ,2 ]
机构：
[1] Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing
[2] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing
[3] Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2022年 / 47卷 / 12期
关键词：
engineering geology; flexible rockfall barrier; movement characteristics; rockfall; Rockyfor3D; strong earthquake area; UAV tilt photogrammetry technology;
D O I：
10.3799/dqkx.2022.326
中图分类号：
学科分类号：
摘要：
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. © 2022 China University of Geosciences. All rights reserved.
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页码：4559 / 4573
页数：14
相关论文
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