爆炸荷载作用下相邻隧道破坏模式及荷载分布规律数值模拟分析  

Numerical Simulation Analysis of Failure Mode and Load Distribution Law of Adjacent Tunnel Under Blast Load

作　　者：王海军 崔传安 岳政圆 Wang Haijun;Cui Chuan'an;Yue Zhengyuan

机构地区：[1]陆军工程大学国防工程学院,江苏南京210094

出　　处：《重庆建筑》2023年第10期49-53,共5页Chongqing Architecture

摘　　要：直墙拱结构是地下防护工程最为主要的一种结构,其在爆炸荷载作用下的结构表面荷载分布规律直接影响结构的破坏模式。因此,研究爆炸侧顶爆作用下,相邻侧的破坏模式及其荷载分布规律对双线地下防护工程抗爆设计将具有指导意义。利用三维建模、Hypermesh网格划分、LS-DYNA数值计算等软件建立数值计算模型,通过流固耦合算法对相邻隧道进行了不同爆距、不同隧道间距、不同TNT炸药量情况下的数值模拟计算,结果表明:模拟中爆炸应力波在岩石中的传播与经典理论公式吻合较好;相邻侧破坏模式基本为拱迎爆面背部震塌破坏、背爆面直墙根部受剪破坏;其迎爆面荷载分布可近似为均布荷载;在一定条件下对拱迎爆面峰值荷载利用拟合公式可进行预测。The straight-wall arch structure is one of the most important structures in underground protection engineering,and the load distribution law of its surface under explosive load directly affects its failure mode.Therefore,to study the failure mode and load distribution law of adjacent sides under the effect of top explosion has some guiding significance for the anti-explosion design of double-line underground protective engineering,The numerical calculation model was established by using three-dimensional modeling,Hypermesh meshing,LS-DYNA numerical calculation and other software to conduct numerical simulation and calculation of the adjacent tunnels under different blasting distances,different tunnel spacing and different TNT explosive amounts by fluid-solid coupling algorithm.The results showed that in the simulation the propagation of explosive stress wave in rocks is in good agreement with the classical theoretical formula.The failure mode of the adjacent side is basically the collapse failure of the back of the arch face and the shear failure of the straight wall root of the back face.The load distribution on the blasting face can be approximated as uniform load.Prediction of the peak load on the arch face can be realized with fitting formulas under certain conditions.

关 键 词：爆炸荷载 相邻隧道 数值模拟 荷载分布 

分 类 号：TU91[建筑科学—建筑理论]