Analysis on the interception effect of neosinocalamus affinis on small falling rocks

Dangerous rock disaster is prevalent geological hazard in southwest China. Under the influence of gravity, dangerous rock masses can easily trigger rockfalls, posing a significant threat to infrastructure such as roads, bridges, and railways. Therefore, it is crucial to effectively intercept rockfalls. Common interception facilities, including stone-blocking trenches, stone-blocking nets, and retaining walls, are often constrained by terrain and construction limitations, making it difficult to implement them on a large scale and resulting in reduced interception effectiveness. The southwestern region of China is rich in Cizhu bamboo, which exhibits rapid growth, strong reproductive capabilities, and resistance to bending, rendering it highly effective in intercepting falling rocks. This study employs a combination of model testing and numerical simulation to investigate the impact resistance of Cizhu bamboo and proposes a strategy for using Cizhu bamboo to intercept small-scale rockfalls. The research findings are as follows: (1) The energy requirements of Cizhu bamboo increase with diameter and wall thickness, while decreasing with age, length-to-weight ratio, and aspect ratio. (2) A cluster of Cizhu bamboo can consume a minimum of 3975.55 J and a maximum of 10890.88 J of energy during impact resistance. (3) Utilizing the CRockfall software, the interception effect of Cizhu bamboo on rockfalls is calculated, indicating that a slope with a height of 43 m and a dangerous rock of 0.5 m in diameter requires the planting of 2 rows, 3 lines, and 6 clusters of Cizhu bamboo.