Service Performance Study of High-Strength Three-Dimensional Geonets for Ecological Slope Protection
This study aims to assess the practical utility of high-performance three-dimensional geonets as a surface layer material for flexible ecological protection structures on slopes,and in-depth study is carried out to explore their long-term performance.The effects of three types of protection(no protection,high-strength three-dimensional mesh,and framework protection)on slope erosion resistance and the anti-aging performance of different types of high-strength three-dimensional mesh are studied by simulated rainfall erosion test and artificial accelerated aging test.The results show that:(1)high-strength three-dimensional geonets exhibit exceptional protective performance on the slope surface,leading to a significant reduction in sediment content in the runoff from 39％to 18％.(2)After aging,the mass decay rate of high-strength three-dimensional mesh is only about 50％of that of traditional three-dimensional mesh,and the service life is 8.4 times that of traditional three-dimensional mesh.(3)The incorporation of carbon black as an aging inhibitor proves effective in extending the material's service life,but it will reduce the initial toughness and strength,and the tensile strength of the material is still enough to meet the requirements of service.Notably,the aging inhibitor primarily comes into play in the latter stages of the aging process,specifically after 300 hours of aging,with the strength degradation rate in the latter phase being only one-third of that in the initial stage.These research findings furnish crucial theoretical and practical support for the optimization and widespread adoption of high-strength three-dimensional geonets in ecological protection technology.
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