高填方路堤土中爆破数值模拟  

Numerical Simulation of Blasting in Highly Filled Embankment Soil

作　　者：魏连雨[1,2] 刘艳竹 李海超[1] 魏凯[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401

出　　处：《科技导报》2014年第32期32-36,共5页Science & Technology Review

基　　金：河北省交通运输厅科技计划项目(20140629)

摘　　要：由于进行多次、大规模爆破成腔试验研究存在一定难度,本研究采用爆炸流体动力学数值分析方法,模拟土中爆腔形成和周围土体挤密效果。对现场爆破试验采集到的爆炸波波速进行分析,推导出土壤的相关参数,然后采用基于ANSYS/LS-DYNA中多物质ALE算法,对土中爆破成腔进行分析,得到爆腔大小与土体压实度关系以及爆腔周围土体密度随爆心距变化关系,爆破成腔数值模拟结果与现场爆破试验结果具有较好的一致性。Since there is a certain degree of difficulty to carry out a large number of large-scale blasting experiment studies, this paper uses an explosive fluid dynamics numerical analysis method to simulate the explosion cavity formation and the effect of soil compaction around the explosion cavity, First the explosion wave velocity collected from blasting test are analyzed to derive the relevant parameters of the soil, and then with the ANSYS/LS-DYNA ALE algorithm for multiple materials, the problem about blasting the cavity of the soil is analyzed. The relation between the explosion chamber and the degree of compaction of soil before blasting, and hew the soil density around the explosion chamber ehanges with the blasting distance are obtained. There is a good agreement between the blasting results of numerical simulation and field blasting test results.

关 键 词：高填方路堤 爆破 爆腔 

分 类 号：U416.1[交通运输工程—道路与铁道工程]