Evolution of forces and deformations of flexible protective net system of a high slope under rockfall impacts

ZHANG Yubin; LANG Xiaoming; QU Xin; BAI Liang

doi:10.20265/j.cnki.issn.1007-2993.2024-0576

Volume 40 Issue 3

Jun. 2026

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ZHANG Yubin, LANG Xiaoming, QU Xin, BAI Liang. Evolution of forces and deformations of flexible protective net system of a high slope under rockfall impacts[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(3): 384-392. doi: 10.20265/j.cnki.issn.1007-2993.2024-0576

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ZHANG Yubin, LANG Xiaoming, QU Xin, BAI Liang. Evolution of forces and deformations of flexible protective net system of a high slope under rockfall impacts[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(3): 384-392. doi: 10.20265/j.cnki.issn.1007-2993.2024-0576

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Evolution of forces and deformations of flexible protective net system of a high slope under rockfall impacts

doi: 10.20265/j.cnki.issn.1007-2993.2024-0576

1.
Zhejiang Ningbo-Zhoushan Duplex Line Phase I Highway Co., Ltd., Zhoushan 316100, Zhejiang, China
2.
Zhoushan Bridge Construction Management Center, Zhoushan 316100, Zhejiang, China
3.
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China

Received Date: 2024-12-07
Accepted Date: 2025-08-25
Rev Recd Date: 2025-08-01

Available Online: 2026-06-08

Publish Date: 2026-06-08

Abstract

Abstract

Flexible protective nets are the primary means of protection against rockfall disasters on high slopes, characterized by rapid construction, easy installation, and outstanding protective capabilities. This paper takes a highway reconstruction project as an example and employs the discrete element method to numerically simulate the flexible protective net, slope, and falling rocks, simulating the entire process of high slope rockfall impacting the protective net. The study investigates the motion trajectory and velocity change patterns of rocks from detachment to impact with the protective net and provides a detailed analysis of the dynamic response during the rock impact on the protective net. The results show that flexible protective nets can significantly reduce the velocity of falling rocks and effectively intercept high-speed rocks by gradually absorbing their kinetic energy through energy dissipaters. The research finds that there are two deformation peak areas when rocks impact the passive protective net, corresponding to the first impact and the second impact when the rock falls from the net to the bottom. The maximum deformation occurs during the first impact. Analysis of the forces on the protective net’s anchor ropes indicates that the forces on anchor ropes at different positions vary, with significant influence from the impact location. This study confirms the key role of flexible protective nets in dealing with rockfall disasters on high slopes, providing important theoretical basis and practical guidance for high slope protection.
- discrete element simulation,
- rockfall protection,
- flexible protective net,
- high slope

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References(26)

References

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Evolution of forces and deformations of flexible protective net system of a high slope under rockfall impacts

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Evolution of forces and deformations of flexible protective net system of a high slope under rockfall impacts

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