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| 预埋PVC管炮孔影响爆破效果浅析 | |
| 引用本文： | 李迎军,张学祯,宋华.预埋PVC管炮孔影响爆破效果浅析[J].铜业工程,2012(4):33-35. |
| 作者姓名： | 李迎军 张学祯 宋华 |
| 作者单位： | 1. 广东爆破工程有限公司,广东广州,510660 2. 中国建筑材料工业建设西安工程有限公司,陕西西安,710000 3. 武汉理工大学,湖北武汉,430070 |
| 摘 要： | 在拆除爆破施工工程中,利用预埋PVC管作为爆破拆除的炮孔,可以有效的节约钻孔时间及成本,但其爆破效果并不能满足预期效果。针对该问题,根据炸药在PVC管中应力波的传播规律,对PVC管弱化爆破效果进行理论分析,掌握管壁材料波阻抗对孔壁初始压力的影响。利用数值模拟软件ANSYS/LS-DYNA及现场试验,将钻孔和PVC管爆破过程进行对比研究,得出使用PVC管时需要额外消耗约10%的炸药,因此根据不断的现场试验,确定使用PVC管时需要增加单孔药量为50g左右。 |
| 关 键 词： | 拆除爆破 预留炮孔 PVC管 数值模拟 爆破效果 |
Research on the Blasting Effect Influenced by PVC Tubes Embedded in the Blasting Holes |
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| LI Ying-jun , ZHANG Xue-zhen , SONG Hua.Research on the Blasting Effect Influenced by PVC Tubes Embedded in the Blasting Holes[J].Copper Engineering,2012(4):33-35. | |
| Authors: | LI Ying-jun ZHANG Xue-zhen SONG Hua |
| Affiliation: | 1.Guangdong Blasting Engineering Co.Ltd,Guangzhou,Guangdong 510660,China; 2.China Building Materials Industrial Construction Xi’an Engineering Co Ltd,Xi’an,Shanxi 710000,China; 3.Wuhan University of Technology,Wuhan,Hubei 430070,China) |
| Abstract: | In the construction work of demolition blasting,PVC tubes are used as blasting holes.It can save drilling time and cost effectively,but the blasting effect can not reach the expected effect.Aiming at this problem and according to the spread law of explosive stress-wave in PVC tube,blasting effect reduced by PVC tube is analyzed though theory.Initial stress of blasting hole wall is influenced by wave impedance of tube wall material.Numerical simulation named ANSYS/LS-DYNA and blasting tests are used,blasting of drilling hole and PVC tube are compared to study.About 10% extra explosive is needed in PVC tube.So according to continuous tests,additional explosive per blasting hole is about 50 g.It can provide references to similar blasting project. |
| Keywords: | demolition blasting reserved blasting hole PVC tube numerical simulation blasting effect |
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