地质科技通报2025，Vol.44Issue(2)：104-115,12.DOI:10.19509/j.cnki.dzkq.tb20240068
基于运动学三维模拟的山区公路崩塌灾害损伤评价及治理
Rockfall damage evaluation and treatment suggestions for mountain highways based on three-dimensional kinematic simulations
摘要
Abstract
[Objective]Three-dimensional kinematic simulation,which takes into account the characteristics of slope topography,serves as a crucial foundation for assessing rockfall risks in mountainous highways.Additionally,its computational outcomes can significantly enhance management strategies for rockfall mitigation.[Methods]Leveraging field investigations and Unmanned Aerial Vehicle(UAV)aerial surveys,we conducted a detailed analysis of the distribution,material composition,and disaster characteristics of hazardous rocks within the study area.Using RocPro3D software,we simulated the three-dimensional kinematics of rockfall to evaluate the disaster's impact and assess the effectiveness of engineering interventions for rockfalls of various particle sizes,complemented by protective measures.[Results]Our findings indicate that joints formed due to tectonic compression and stress relief from unloading segment the precarious rock masses,while weathering cavities at their bases diminish stability.Hydrostatic thrust exerted by trailing edge cracks,along with water seepage through these fractures,are identified as typical triggers of rockfall events.Post-collapse,the velocity and impact energy of falling rocks initially increase and then decline,while bounce height exhibits variability before showing a decreasing trend.Hazardous rock zones within the study area pose a significant threat to management facilities situated at the foot of the slope.An effective remedial measure involves clearing areas adjacent to dangerous rocks with diameters less than 0.8 meters and implementing a passive protection net measuring 5.0 meters in height,designed to withstand an energy level of 1 000 kJ.Localized concentration areas within the spatial distribution of rockfall movement traces should be appropriately reinforced.[Conclusion]Three-dimensional kinematic simulation provides detailed information on rockfall movement traces,velocity,energy,bounce height,and unit density.This approach transcends the spatial limitations inherent in two-dimensional cross-sectional analyses,proving immensely valuable for evaluating disaster damage and enhancing geological disaster prevention efforts.关键词
山区公路/崩塌/运动学/三维模拟/RocPro3D/灾害损伤评价/工程治理Key words
mountain highway/rockfall/kinematics/three-dimensional simulation/RocPro3D/damage evaluation/engineering treatment分类
交通运输引用本文复制引用
张乐,陈沛,向波,张俊云,何云勇,叶尚其,龚臻,徐鸿彪,李颖..基于运动学三维模拟的山区公路崩塌灾害损伤评价及治理[J].地质科技通报,2025,44(2):104-115,12.基金项目
交通运输部重点科技项目(2021-ZD1-019) （2021-ZD1-019）
四川省交通运输科技项目(2021-A-02 （）
2024-ZL-02) （）
