孔庆亮,夏治园,王刚,刘明锋,钱明渊,杨帆,高朋飞

• 1:浙江省第一水电建设集团股份有限公司
• 2:安徽江南爆破工程有限公司

摘要(Abstract)：

针对复杂环境下57 m高双筒型旧硝铵造粒塔拆除爆破工况，通过分析双筒型造粒塔存在下落势能大与质量分布不均的结构特点，设计了中间起爆、逐段向双侧的爆破方式，以实现“定向爆破+内合”的倒塌效果。爆破设计方案中采用梯形爆破切口，并严格控制其周长及高度，适当保留底部支撑墙体并开设精确对称定向窗，使用高精度导爆管雷管结合孔内延时、孔外接力的复式闭合双回路起爆技术进行爆破施工。经理论分析计算，最终确定爆破切口长度为13.5 m、高度3.5 m。为验证设计方案的合理性，使用LS-DYNA仿真软件建立造粒塔三维有限元模型并进行了倒塌预分析。仿真计算结果显示：造粒塔爆破倒塌过程共历时约8.8 s,通过对造粒塔倒塌形态和顶部关键质点位移变化进行分析发现倒塌过程存在轻微下座，未发生前冲现象，总体方案的爆破参数选取合理，拆除爆破可达到预期效果。现场爆破完成后发现爆破倒塌效果与仿真计算结果基本一致，为同类型爆破工程提供了一定参考。

关键词(KeyWords)： 双筒造粒塔;定向爆破;分离式共节点;数值模拟;爆破设计

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 孔庆亮,夏治园,王刚,刘明锋,钱明渊,杨帆,高朋飞

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