摘要
随着山区高速公路建设的迅速推进,弃渣场的稳定性及潜在失稳灾害评估日益受到重视。具有巨大能量的滑坡体,可能会冲击破坏沿途的结构物进而威胁生命财产安全。充分发挥利用物质点法(material point method,MPM)可以对连续介质大变形过程模拟和离散元法(digital elevation model,DEM)能够精准的接触判断优势,MPM-DEM耦合算法可有效解决滑坡体与复杂地形、沿线结构物之间的相互作用问题。文章基于GPU并行高性能计算软件CoSim中的MPM-DEM耦合算法,实现了对弃渣场边坡稳定性、潜在失稳灾害的动力学分析。研究首先以散粒体冲击结构物的算例,验证了该算法的合理性与准确性;在此基础上,以云南某高速公路弃渣场为研究案例,进一步计算其稳定性系数,并预测潜在失稳灾害的影响范围与危害程度。结果表明,该弃渣场边坡目前处于稳定状态;若发生失稳,滑坡体将对下游高速公路桥桩产生巨大冲击力。该耦合算法在弃渣场边坡稳定性与失稳灾害动力学分析中具备显著优势,能够实现边坡“稳定性→大变形→流动→堆积”的全过程分析。
The rapid expansion of highway construction in mountainous areas has heightened the focus on the stability of dumpsites and the assessment of potential failure disasters.High-energy landslides can severely impact structures along the way,posing significant risks to life and property.Leveraging the material point method(MPM)for simulating deformations in continuous media and the discrete element method(DEM)for precise contact detection,the MPM-DEM coupling algorithm can effectively models interactions between landslides and complex terrains or structures.This study employs the MPM-DEM coupling algorithm within the GPU-accelerated high-performance computing software CoSim to analyze the stability and dynamic hazard potential of dumpsite slopes.The validity and accuracy of the proposed algorithm were initially verified through a case study involving granular material impacting a structure.Subsequently,a highway dumpsite in Yunnan Province was selected as an example to evaluate the stability factor and the predict the potential failure’s impact range and severity.Results indicate that the dumpsite slope is currently stable;however,should instability occur,it would exert significant impact on downstream highway bridge piles.The numerical simulation results demonstrate the strong capabilities of the coupling algorithm in the stability and dynamic failure analysis of dumpsite slopes,which can simulate the entire process of"stability-large deformation-flow-accumulation"for slopes.
作者
任禾
王君豪
徐文杰
王恒威
董晓阳
孙文超
冯明明
吕飞
REN He;WANG Junhao;XU Wenjie;WANG Hengwei;DONG Xiaoyang;SUN Wenchao;FENG Mingming;LYU Fei(Broadvision Engineering Consultants Co.Ltd.,Kunming,Yunnan 650011,China;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;School of Engineering&Technology,China University of Geosciences(Beijing),Beijing 100083,China)
出处
《中国地质灾害与防治学报》
2025年第6期37-47,共11页
The Chinese Journal of Geological Hazard and Control
基金
公路弃渣场失稳灾害评估及防治关键技术研究与运用示范项目(YCIC-YF-2022-09)。
