Influence factors of the maximum impact force on the protective structure under rockfall

Chang Li’an; Ai Yan; Liu Hongyan

doi:10.20265/j.cnki.issn.1007-2993.2024-0058

Volume 39 Issue 2

Apr. 2025

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Chang Li’an, Ai Yan, Liu Hongyan. Influence factors of the maximum impact force on the protective structure under rockfall[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(2): 297-304. doi: 10.20265/j.cnki.issn.1007-2993.2024-0058

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Chang Li’an, Ai Yan, Liu Hongyan. Influence factors of the maximum impact force on the protective structure under rockfall[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(2): 297-304. doi: 10.20265/j.cnki.issn.1007-2993.2024-0058

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Influence factors of the maximum impact force on the protective structure under rockfall

doi: 10.20265/j.cnki.issn.1007-2993.2024-0058

Chang Li’an^1
,,
Ai Yan²,
Liu Hongyan^{2
,
,}

1.
Xi’an Engineering Investigation and Design Research Institute of China National Nonferrous Metals Industry Co., Ltd., Xi’an 710061, Shaanxi, China
2.
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China

Received Date: 2024-01-31
Accepted Date: 2024-05-09
Rev Recd Date: 2024-04-30

Available Online: 2025-04-07

Publish Date: 2025-04-08

Abstract

Abstract

The maximum impact force caused by the rockfall on protective structures is the premise and basis for the design of protective structures, so it is of great engineering significance to accurately predict it. Therefore, to explore the influence factors of the maximum impact force caused by the rockfall on the protective structure under different rockfall parameters and protective structure characteristics, a set of rockfall impact test device was designed. The maximum impact of the rockfall of three different shapes, such as spherical, cylindrical and irregular, on the protective structure under different the following conditions, such as rockfall mass, rockfall height, slope gradient, protective structure angle and buffer layer thickness, was studied. The test results show that the maximum impact force of the rockfall on the protective structure increases linearly with the increase of the mass and height of the rockfall, increases rapidly with the increase of the slope gradient and the angle of the protective structure, and decreases linearly with the increase of the buffer thickness. In addition, it is found that the maximum impact of the shape and height of the rockfall on the protective structure will cause greater dispersion, and the maximum impact of the irregular shape of the rockfall on the protective structure is mainly due to the complexity of the rockfall motion process and the uncertainty of the impact blocking process caused by the irregular shape of the rockfall. It is concluded that the impact attitude of the rockfall and its contact mode with the protective structure have a very important influence on the maximum impact force of the protective structure. The research results can provide reference for the prevention and control of rockfall disasters and the design of protective structures.
- rockfall shape,
- the maximum impact force,
- protective structure

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References(22)

References

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Influence factors of the maximum impact force on the protective structure under rockfall

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