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| Study on calculation method of rockfall impact force based on proportional coefficient of energy
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| WANG Dongpo1，ZHANG Hongyan1，LI Wei1，YAN Shuaixing1，WANG Jian1，XIANG Bo2 |
| (1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，
Chengdu，Sichuan 610059，China；2. Sichuan Highway Planning，Survey，Design and Research Institute Ltd.，
Chengdu，Sichuan 610000，China) |
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Abstract Rockfall impact force is an important basis for the design of protection engineering. Therefore，based on the principle of energy conservation and the introduction of proportional coefficient of energy，the calculation method of the maximum impact force of rockfall impacting soil considering the impact angle was established. Through physical model tests，the effects of rockfall mass and size，impact velocity and angle，soil density and compressive strength on the proportional coefficient of energy were explored，and a dimensionless empirical formula for the proportion coefficient of energy was constructed. Furthermore，the calculation model of the rockfall impact force was established and its reliability was verified. The results show that the proportional coefficient of energy is negatively correlated with rockfall mass，impact velocity and impact angle，but positively correlated with rockfall size，soil density and compressive strength. The proposed method based on the proportional coefficient of energy can effectively predict the maximum impact force of rockfall，and is in good agreement with the results of large-scale model tests in literature. The research can provide theoretical basis and technical support for the prevention and control of rockfall disaster.
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2023, Vol. 42 
