| 基于3DDDA方法滚石平台防护作用研究? |
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| 引用本文： | 刘国阳,李俊杰,康 飞.基于3DDDA方法滚石平台防护作用研究?[J].防灾减灾工程学报,2020(5):679-689. |
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| 作者姓名： | 刘国阳 李俊杰 康 飞 |
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| 作者单位： | 沈阳工业大学建筑与土木工程学院,辽宁 沈阳 110870;大连理工大学建设工程学部水利工程学院,辽宁 大 连 116024 ；西藏大学工学院,西藏 拉萨 850000 |
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| 基金项目： | 国家重点研发计划项目(2016YFC0401600,2017YFC0404906)、国家自然科学基金项目(51769033,51779035)、中央高校基本科研业务费重大项目科研专题项目(DUT17ZD205)资助 |
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| 摘 要： | 采用三维非连续变形分析(3D DDA)方法输出滚石动能和运动轨迹,其结果与现有室内实验和数值模拟方法进行比较,验证了 3D DDA 方法的准确性。通过分析滚石平台对不同坡高、不同坡角、不同折点位置的岩质边坡滚石动能、运动轨迹的影响,研究了滚石平台对滚石运动的影响规律。最后,以西藏高原朗村复杂坡形岩质边坡为工程背景,分析了坡底平台对滚石灾害的防护作用。结果表明:滚石平台可降低滚石动能,改变滚石运动轨迹,减小滚石对坡底防护结构或交通线路等结构物的冲击作用。同时,给出不同边坡特征下滚石运动及相应的平台设计宽度总体规律,为滚石平台设计提供依据。
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| 关 键 词： | 三维非连续变形分析 滚石平台 动能 运动轨迹 |
Study on the Protective Effect of Rockfall Platform Based on 3D DDAMethod |
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| LIU Guoyang,LI Junjie,KANG Fei.Study on the Protective Effect of Rockfall Platform Based on 3D DDAMethod[J].Journal of Disaster Prevent and Mitigation Eng,2020(5):679-689. |
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| Authors: | LIU Guoyang LI Junjie KANG Fei |
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| Abstract: | A three-dimensional discontinuous deformation analysis(3D DDA)method was used tooutput the kinetic energy and motion trajectory of rolling blocks. Compared with the results of the ex?isting laboratory experiment and numerical simulation method,the accuracy of the 3D DDA methodwas verified. By analyzing the influence of the rockfall platform on the kinetic energy,motion trajecto?ry and movement law of blocks along rock slopes with different slope heights,slope angles and foldingpoint positions,the influence law of the rockfall platform on the block movement was studied. Final?ly,the rockfall slope with a complex slope shape at Lang village in Tibet was simulated,and the pro?tective effect of the rockfall platform on rockfall disaster was analyzed. The results show that the rock?fall platform can decrease the kinetic energy of the rolling block,change the block motion trajectory,and reduce the impact of the rolling block on the protection structure or the traffic line at the slope bot?tom. Meanwhile,the general laws including the block movement and the corresponding platform de?sign width under different slope characteristics are given,and they provide a basis for the design ofrockfall platform. |
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