坑道内爆炸作用下开槽参数对结构性能的影响  

Influence of Excavation Parameters Mass on Structure Performance under the Internal Explosion in Tunnels

作　　者：张裕[1,2] 刘元雪[1,2] 赵吉昌 李灿良[4] 

机构地区：[1]后勤工程学院军事土木工程系 [2]后勤工程学院岩土力学与地质环境保护重庆市重点实验室 [3]68206部队 [4]解放军第187医院

出　　处：《后勤工程学院学报》2016年第6期28-34,共7页Journal of Logistical Engineering University

基　　金：重庆市基础与前沿研究计划项目(CSTC2014jcyjA30015;2014jcyjA30014);重庆市基础科学与前沿技术研究专项重点项目(CSTC2015jcyjBX0073);重庆市国土资源和房屋管理局科技计划项目(CQGT-KJ-2014052);重庆市研究生科研创新项目(CYB14103)

摘　　要：在坑道边墙上设置粗糙构造能够对冲击波起到一定的衰减作用。对坑道内爆炸的粗糙边墙技术进行研究,提出了在边墙及岩体中开挖槽体的冲击波防护方法。为考察开槽面积率、槽深及等体积开槽下二者的组合形式对结构抗爆性能的影响,设计了3种开挖方案。采用有限元分析软件LS-DYNA,得到了不同方案对结构顶板峰值竖向加速度、峰值最大主应力的影响,分析了不同开槽参数下结构的抗爆性能,为地下工程抗内爆炸开槽防护设计提供参考。The arrangement of rough structures on the tunnel side wall can attenuate the shock wave under the internal explosion. In order to develop the anti explosion method of rough side walls, the new anti explosion method of excavation both in the side wall and rock mass is put forward in this paper. Three schemes are designed to study the influence of excavation area ratio, excavation depth and their combinations on the explosion resisting performance for structure. Based on the finite element analysis software LS-DYNA, the influence of different schemes on the tunnel＇s vault peak vertical acceleration and peak maximum principal stress is studied. The anti explosion property of the underground structure under different excavation parameters is analyzed for providing a reference for the anti explosion excavation design of underground structures.

关 键 词：坑道 开槽 内爆炸 抗爆性能 防护设计 

分 类 号：O383.1[理学—流体力学]