| 爆破振动综合减震措施的减震效应研究* |
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| 引用本文： | 邹烽,席田,胡业红,谢文,何梦,高凤琴,诸洲,张建经.爆破振动综合减震措施的减震效应研究*[J].中国安全生产科学技术,2022,18(6):119-126. |
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| 作者姓名： | 邹烽 席田 胡业红 谢文 何梦 高凤琴 诸洲 张建经 |
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| 作者单位： | （1.中核华辰建筑工程有限公司，陕西 西安 712000；2.西南交通大学 土木工程学院，四川 成都 610031） |
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| 基金项目： | * 基金项目: 国家重点研发计划项目（2017YFC0504901）；中核集团科研创新项目（FWHT-20-0002） |
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| 摘 要： | 为提高爆破减震措施的减震效果并降低工程造价，提出将减震沟和减震孔进行组合的综合减震方法。采用LS-DYNA动力分析软件从爆破振动速度、频谱特征以及应力云图3个方面对减震孔、减震沟以及综合减震措施的减震效果进行对比分析。研究结果表明:综合减震措施在水平径向和垂直向上的减震率相对最大，分别达81.91%，75.74%；综合减震措施由于减震孔的存在，对爆破地震波高频成分的滤波作用优于减震沟措施；综合减震措施下部的减震孔会继续阻碍应力波的传播，进一步削减应力波能量，从而达到保护隔震屏障后方建（构）筑物安全的目的。
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| 关 键 词： | 综合减震 数值仿真 爆破振动 频谱特性 减震效果 |
Research on damping effect of comprehensive damping measure for blasting vibration |
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| ZOU Feng,XI Tian,HU Yehong,XIE Wen,HE Meng,GAO Fengqin,ZHU Zhou,ZHANG Jianjing.Research on damping effect of comprehensive damping measure for blasting vibration[J].Journal of Safety Science and Technology,2022,18(6):119-126. |
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| Authors: | ZOU Feng XI Tian HU Yehong XIE Wen HE Meng GAO Fengqin ZHU Zhou ZHANG Jianjing |
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| Affiliation: | (1.China Nuclear Huachen Construction Co.,Ltd.,Xi’an Shaanxi 712000,China;2.College of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China) |
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| Abstract: | In order to improve the damping effect of blasting damping measures and reduce the project cost,a comprehensive damping method combining the damping ditch and damping hole was proposed.The LS-DYNA dynamic analysis software was used to compare and analyze the damping effect of the damping hole,damping ditch and comprehensive damping measure from the perspectives of blasting vibration velocity,spectral characteristics and stress nephogram.The results showed that the comprehensive damping measure had the relatively largest damping rates in the horizontal radial and vertical upward directions,reaching 81.91% and 75.74% respectively.Due to the existence of damping hole,the filtering effect of comprehensive damping measure on the high-frequency components of blasting seismic waves was better than that of damping ditch measure.The damping hole at the lower part of the comprehensive damping measure would continue to hinder the propagation of stress wave and further reduce the energy of stress wave propagation,so as to achieve the purpose of protecting the safety of buildings and structures behind the isolation barrier. |
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| Keywords: | comprehensive damping numerical simulation blasting vibration spectral characteristics damping effect |
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