摘要
基于极限平衡的力学原理,提出了不假设条柱间作用力的对称三维边坡安全系数计算方法,推导出了考虑爆破地震动荷载方向和强度的安全系数表达式。通过3个经典算例的分析计算,量化了爆破地震动荷载方向和强度对边坡安全系数的影响。结果表明,在爆破地震动荷载作用下,三维对称边坡的最危险作用方向与下滑力的合力方向一致;当爆破地震动荷载拟静力系数从0逐步增大到0.3,边坡安全系数逐渐减小,在最不利方向上3个算例的安全系数最大分别减小了38.89%、29.29%和42.83%。所提方法及分析结果可为武器打击条件下匀质边坡稳定性分析和安全风险评估提供参考。
Based on the mechanical principle of limit equilibrium,a method for calculating the safety factor for a symmetric three-dimensional slope without assuming the inter-column forces is proposed,and the safety factor expression considering the direction and intensity of blast-induced load is derived.The three classic examples are analyzed to quantify the influence of the direction and intensity of blast-induced load on the safety factor of the slopes.The results show that under the action of blast-induced load,the most dangerous action direction of the three-dimensional symmetric slope is consistent with the resultant force direction of the sliding force;as the pseudo-static coefficient of the blast-induced load gradually increases from 0 to 0.3,the slope safety factor gradually decreases,and the safety factors of the three examples in the most unfavorable direction decrease by up to 38.89%,29.29%,and 42.83%respectively.The proposed method and analysis results provide a reference for the stability analysis and safety risk assessment of homogeneous slopes under weapon strike conditions.
作者
刘华丽
赵跃堂
朱彦涛
黎明
LIU Huali;ZHAO Yuetang;ZHU Yantao;LI Ming(College of Field Engineering,Army Engineering University of PLA,Nanjing 210007,China;School of Architectural Engineering,Xizang Vocational and Technical College,Lasa 850030,China;Unit 69006 of PLA,Urumqi 830001,China)
出处
《陆军工程大学学报》
2025年第6期1-7,共7页
Journal of Army Engineering University of PLA
基金
国家重点研发计划(2024YFF0508204)
西藏自治区自然科学基金(XZ202501ZR0131)。
关键词
爆破地震动
三维对称边坡
稳定性
安全系数
blast-induced vibration
three-dimensional symmetrical slope
stability
safety factor
