柱状装药两点起爆加固黄土软基数值模拟研究  

Numerical Simulation of Reinforcing Soft Loess Foundation by Column Charge with Two-spot Initiation

作　　者：周双涛[1] 李海超 王志鹏[1] 

机构地区：[1]军事交通学院研究生管理大队,天津300161 [2]军事交通学院国防交通系,天津300161

出　　处：《爆破》2016年第3期41-46,共6页Blasting

基　　金：河北省交通运输厅科技计划项目-高填方路堤软弱区域爆破挤密加固新技术研究(20140629)

摘　　要：运用ANSYS/LS-DYNA有限元仿真软件对柱状装药两点起爆加固黄土软基进行模拟研究。重点模拟爆炸扩腔过程、土壤加固过程和土中应力变化情况,并对应力波碰撞叠加出现的马赫反射进行分析。与先前完成的土中爆炸加固试验结果进行对比,两者间的误差为14.3%,说明模拟能较好吻合试验结果。研究结果表明:柱状装药两点起爆对黄土软基的加固效果优于一点起爆。The finite element simulation software ANSYS/LS-DYNA was used to simulate the reinforcement of the loess soft foundation by column charge with two-spot initiation. Specially, the process of expanding cavity, the soil density and the stress change were simulated, and the Maher reflection wave from the stress wave collision was also discussed. Compared with the results of the previously completed soil reinforcement, the error was 14.3% ,which indicates that simulation fitted test results well. The results showed that the reinforcement effect of two-spot initiation on the soft soil foundation of column charge was better than the case of one initiation ,which would help the layout of the explosive in the loess soft foundation with multiple-point initiation in future.

关 键 词：爆炸 黄土软基 数值模拟 两点起爆 柱状装药 

分 类 号：O382.2[理学—流体力学]