两点起爆加固黄土软基规律探究  

Study on Reinforcement of Soft Soil Foundation by Two Points Initiation

作　　者：李海超[1,2] 周双涛[2,3] 常春伟[2] 李北杰 

机构地区：[1]河北工业大学土木工程学院 [2]军事交通学院 [3]61969部队 [4]61825部队

出　　处：《爆破》2017年第1期94-100,共7页Blasting

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

摘　　要：运用数值仿真软件ANSYS/LS-DYNA模拟爆炸加固黄土软基的扩腔过程,以及应力波的传播过程。探究相同炸药量工况下,不同爆点距离对土壤加固密度的影响规律。研究结果表明:爆点连线中点处密度值随爆点距离的增加呈二次方递减,并得出爆点连线中点处土壤密度值随爆点距离变化的计算公式。并且发现加固后土壤密度最小值位于两爆点连线的黄金分割点上。探究两点起爆加固黄土软基的规律,可为今后研究多点起爆加固土壤的爆点布置距离奠定基础。The process of expanding the cavity of the loess soft foundation and the stress wave propagation were simulated by the software ANSYS/LS-DYNA. The influence of different distance of explosion on the soil reinforcement density was explored on the condition of same quantity of explosive. The results showed that the density at the midpoint was quadratic decreasing with increasing distance from the explosion point,and the calculate formula of the soil density following the distance was then obtained. The minimum density of soil reinforcement was found at the golden point of two critical points connection. This conclusion made important significance on the construction of the explosion of soil reinforcement. The reinforcement of soft foundation by two-point initiations helps to develop multipoint initiations in the future.

关 键 词：爆炸 加固 两点起爆 数值模拟 

分 类 号：O382.2[理学—流体力学]