刘赶平

• 1:中铁十六局集团第三工程有限公司

摘要(Abstract)：

大断面隧道爆破产生的振动对主洞及邻近支洞的动力稳定性有着重要的影响。结合赣深高铁龙南长大隧道爆破工程实践,采用现场监测与ANSYS/LS-DYNA动力有限元分析相结合的研究方法,分析了主洞开挖爆破作用下,隧道主洞及邻近斜井支洞围岩中的爆破振动速度响应特征,并基于最小二乘法原理,分析并建立了主洞及斜井两侧围岩中最大质点振动速度处的爆破振动速度预测模型。研究结果表明:主洞水平轴向与水平切向振动速度拱腰处最大,垂直方向振动速度拱顶最大;主洞与斜井交汇区域振动速度不再随着爆心距的增加而减小,而出现小幅的增大,为主洞爆破施工作用下的危险区域,需重点防护。

关键词(KeyWords)： 长大隧道;斜井支洞;爆破振动;动力响应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41372312、41807265)

作者(Author): 刘赶平

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