任李林,叶小兴,曹庆彬,何理,张亮,钟冬望,赵永明,蔡路军

• 1:中铁广州工程局集团市政环保工程有限公司
• 2:武汉科技大学湖北省智能爆破工程技术研究中心
• 3:西成铁路客运专线陕西有限责任公司

摘要(Abstract)：

阐明冲击速度、滚石尺寸及冲击角度等多参数对柔性阻拦网动力响应的耦合作用机制，对于高边坡爆破施工滚石防护结构优化设计意义重大。基于能量法建立了高边坡滚石冲击阻拦网的力学分析模型，推导出最大冲击力与滚石质量、速度及角度的理论关系，即■;并构建了滚石冲击阻拦网的数值计算模型，分别计算了多组单参数单独作用和滚石质量、速度及角度相互耦合作用下的滚石冲击阻拦网的数值模拟，揭示了各参数单独及耦合作用对阻拦网体变形的影响规律。结果表明:最大冲击力与滚石质量呈平方根关系，与速度呈线性正比;竖向角度增大使冲击点外移导致变形减小，滚石半径与变形量呈线性正相关，而速度增长会使材料屈服、系统刚度增强，变形增速趋缓;在多参数共同作用中，参数重要性排序为:冲击速度(33.96%)、滚石半径(32.11%)和竖向角度(30.91%)。在此基础上研发了双道拦截网体系，工程实例应用表明:该体系通过首道网耗散动能、次道网完成拦截，表现出优异的地形适应性和防护效能。

关键词(KeyWords)： 高边坡;柔性阻拦网;抗冲击;耦合作用;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52274136、51904210);; 湖北省自然科学基金项目(2024AFB766)~~

作者(Author): 任李林,叶小兴,曹庆彬,何理,张亮,钟冬望,赵永明,蔡路军

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