结合2个特殊地形条件下的烟囱拆除爆破工程实例,进行了爆破地震效应监测与分析。重点分析了陡壁台阶和山坡地形对烟囱拆除爆破地震效应的影响情况,得出了位于2种特殊地形情况下烟囱拆除爆破地震效应的一般结论。通过对实测振动信号和数据分析比较,发现烟囱拆除爆破地震效应不仅与爆破方案、爆源距离有关,还与烟囱倾倒方向上的场地条件和地震波传播路径上的地形条件等因素有关,并且烟囱触地振动强度不一定比爆破时振动强度大。
【作者单位】：西南科技大学环境与资源学院 四川绵阳621010
【关键词】：特殊地形;烟囱;爆破拆除;冲击振动
【基金】：四川省教育厅资助项目(2002002007)
【分类号】：TU746.5
【DOI】：cnki:ISSN:1001-487X.0.2006-03-027
【正文快照】：
1前言目前,随着工程爆破在城镇建设中的广泛应用,人们对爆破地震效应研究也在不断深化。而对于烟囱拆除爆破地震效应,虽然得到了人们的重视,但由于其爆破装药量少,装药部位较分散,震动强度较小,对其引起的地震效应的研究还远不如其他工程爆破地震效应深入[1-2]。如今这类高耸建
According to two engineering examples of chimney blasting demolition under the special terrain condition.The paper monitors and analyses the seismic effects of the examples.And emphatically analyses the seismic effects status of chimney blasting demolition,which locates at steep sidestep and slope.At last,the ecumenical conclusion of seismic effects on chimney blasting demolishment,which locates at the two special terrain plight,is drawn.After analyzing and comparing the measured vibration signals and data,we can find that the seismic effects of chimney blasting demolition is not only related with blasting project,distance from the vibration source,but also related with the ground conditions in the direction of chimney collapsing and the terrain plight of blasting areas in the direction of seismic wave spread etc.What is more, the intensity of the touchdown vibration of chimney blasting is not always larger than the vibration caused by blasting.
【Keyword】：special terrain;chimney;blasting demolition;impact vibration
