基于能量比例系数的滚石冲击力计算方法研究  

Study on calculation method of rockfall impact force based on proportional coefficient of energy

作　　者：王东坡[1] 张鸿雁 李伟[1] 闫帅星 王健[1] 向波 WANG Dongpo;ZHANG Hongyan;LI Wei;YAN Shuaixing;WANG Jian;XIANG Bo(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,Sichuan 610059,China;Sichuan Highway Planning,Survey,Design and Research Institute Ltd.,Chengdu,Sichuan 610000,China)

机构地区：[1]成都理工大学、地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]四川省公路规划勘察设计研究院有限公司,四川成都610000

出　　处：《岩石力学与工程学报》2023年第2期317-326,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(41877266);四川省交通科技项目(2021-A-04);国家重点实验室自主研究课题(SKLGP2021Z001)。

摘　　要：滚石冲击力是滚石防护工程设计的重要依据。为此,基于能量守恒原理,引入能量比例系数,考虑滚石冲击角度,提出滚石冲击土体的最大冲击力计算方法。通过物理模型试验,研究了滚石特征参数(质量与尺寸)、动力学参数(冲击速度与角度)及土体性质参数(密度与抗压强度)对能量比例系数的影响,构建能量比例系数无量纲经验公式,建立滚石冲击力计算模型并验证了模型的可靠性。结果表明:能量比例系数与滚石质量、冲击速度、冲击角度呈负相关关系,而与滚石尺寸、土体密度以及抗压强度正相关;提出的基于能量比例系数的滚石冲击力计算模型能够有效预测滚石最大冲击力,且与已有研究中大尺度模型试验结果吻合良好。研究成果可为滚石灾害防治提供理论依据及技术支持。Rockfall impact force is an important basis for the design of protection engineering.Therefore,based on the principle of energy conservation and the introduction of proportional coefficient of energy,the calculation method of the maximum impact force of rockfall impacting soil considering the impact angle was established.Through physical model tests,the effects of rockfall mass and size,impact velocity and angle,soil density and compressive strength on the proportional coefficient of energy were explored,and a dimensionless empirical formula for the proportion coefficient of energy was constructed.Furthermore,the calculation model of the rockfall impact force was established and its reliability was verified.The results show that the proportional coefficient of energy is negatively correlated with rockfall mass,impact velocity and impact angle,but positively correlated with rockfall size,soil density and compressive strength.The proposed method based on the proportional coefficient of energy can effectively predict the maximum impact force of rockfall,and is in good agreement with the results of largescale model tests in literature.The research can provide theoretical basis and technical support for the prevention and control of rockfall disaster.

关 键 词：岩石力学 滚石冲击力 能量比例系数 冲击角度 双目视觉技术 

分 类 号：TU45[建筑科学—岩土工程]