防灾减灾工程学报2018，Vol.38Issue(1)：87-93,7.DOI:10.13409/j.cnki.jdpme.2018.01.012
条形药包爆炸破堤的MM-ALE模拟
Numerical Simulation of Dam-blasting Induced by Extended Charges Using MM-ALE Method
摘要
Abstract
In order to study the failure pattern of dams under extended charges,a numerical model based on multi-material ALE method is used to simulate a dam-blasting test,and to analyze the propagation of blast-induced stress waves within soil and the variation of soil density.The results show that the entire evolution process of dam-break induced by explosions can be reproduced by using a MM-ALE model,and the numerical results have good agreement with the experimental data.The repeated superposition of compressional waves and reflection rarefaction waves near the free surface of dam slope and crest is a critical factor in forming blasting burst.The evolution of blast-induced crater exhibits an evident hysteresis relative to the propagation of blasting stress waves.Three regions of the dam are divided after blasting,i.e.,cavity zone,compaction zone and undisturbed zone.Densification belt near the crater can prevent continuous vertical incision caused by water erosion and intermittent horizontal expansion caused by collapse or instability of dyke slope.Local compaction induced by blasting plays an important role in keeping global stability of the dam after blasting.The results can provide reference for blasting demolition of embankments or landslide dams.关键词
条形药包/爆炸破堤/数值模拟/MM-ALE法/爆炸应力波/压缩带Key words
extended charge/dam blasting/numerical simulation/multi material ALE method/blast stress wave/densification belt分类
建筑与水利引用本文复制引用
王维国,方继伟,顾俊钢,陈育民,张守龙..条形药包爆炸破堤的MM-ALE模拟[J].防灾减灾工程学报,2018,38(1):87-93,7.基金项目
国家自然科学基金面上项目(51379067)资助 （51379067）
