不同埋置深度条形药包爆炸挤密黄土规律分析  

An Analysis of the Law of the Effects of the Different Buried Depths of Strip Explosive on Compacting Loess

作　　者：李海超 黄晨旭 张艳萍 LI Haichao;HUANG Chenxu;ZHANG Yanping(National Defense Transportation Department,Army Military Transportation University,Tianjin,300161,China;The 5th Student Brigade,Army Military Transportation University,Tianjin,300161,China)

机构地区：[1]陆军军事交通学院国防交通系,天津300161 [2]陆军军事交通学院学员第五大队,天津300161

出　　处：《国防交通工程与技术》2019年第6期9-13,共5页Traffic Engineering and Technology for National Defence

基　　金：河北省交通运输厅科技计划项目(20140629)

摘　　要：为了满足部队急、战时在黄土地区抢建道路的需求,利用ANSYS/LS-DYNA软件对爆炸挤密法中不同埋置深度的条形药包对黄土的挤密效果进行研究。从外观特征、密度等值面等方面发现了炸药能量在竖直方向上有所泄露的现象,进而通过应力型耦合系数的实验数据,定量地计算了炸药的比例爆炸埋深在1.0~2.0 m/kg 1/3的条件下能量在竖直、水平方向上的泄露程度。进一步结合爆腔体积数据,发现了在浅埋深条件下土体挤密效果与比例爆炸埋深、药包间距的规律。最后为爆炸挤密法处理地基施工提出建议。In order to meet the needs of the troops in building roads in loess areas in case of emergency and in wartime,the ANSYS/LS-DYNA software is used to study the effect of the different buried depths of strip explosive on blasting-compacting loess in the present paper.From the appearance characteristics and the density isosurface,the phenomenon that the explosive energy leaks in the vertical direction is found.Then,under the conditions that the proportional burial depth in soil between 1.0~2.0 m/kg 1/3,the energy leakage in the vertical and horizontal directions is quantitatively calculated with the help of the experimental data of the stress coupling coefficient.Further,through the volume data of the explosion cavity,the law of how the buried depth and the spacing of the explosion affect the compaction effect of the soil under the condition of shallow depth is found.Finally,advice for foundation construction which uses the explosion compacting method is provided in the paper.

关 键 词：爆炸挤密法 挤密效果 比例爆炸埋深 耦合系数 

分 类 号：TU472.9[建筑科学—结构工程] E951[建筑科学—土工工程]