爆破开挖时小净距隧道的合理间距研究
|
摘要
以黄衢南高速公路小净距隧道为工程依托,运用有限元的基本理论,采用ABAQUS软件对小净距隧道爆破开挖时相邻洞的影响进行了研究。重点分析了Ⅳ、V级围岩条件下考虑爆破因素时隧道的合理净距。分析的重点是隧道后行洞爆破开挖时先行洞产生的塑性变形的范围大小,当塑性区贯通时则认为所选用的净距不合理,或应采取措施。为小净距隧道净距优化及施工方法的选择提供参考。
On the basis of neighborhood tunnel in Huang-Qu-Nan Expressway,the influence of blasting excavation of a small-spaced tunnel on nearby tunnel is studied by use of the ABAQUS program.The reasonable spacing of V,IV-class of surrounding rock which consider the impact of tunnel blasting are analyzed selectively.The analytical point is the range of plastic deformation of advance hole when the hole behind is blasting excavation.When the plasticity zone connects,spacing is considered unreasonable or measures are needed.It provides the reference for optimizing the neighborhood tunnel's spacing and construction method.
On the basis of neighborhood tunnel in Huang-Qu-Nan Expressway,the influence of blasting excavation of a small-spaced tunnel on nearby tunnel is studied by use of the ABAQUS program.The reasonable spacing of V,IV-class of surrounding rock which consider the impact of tunnel blasting are analyzed selectively.The analytical point is the range of plastic deformation of advance hole when the hole behind is blasting excavation.When the plasticity zone connects,spacing is considered unreasonable or measures are needed.It provides the reference for optimizing the neighborhood tunnel's spacing and construction method.
引文
[1]吕令毅,王秀喜,等.有限元动力分析的位移递归法[J].地震工程与工程振动,1993,3(6):51-54.
[2]钟建辉.邻近隧道爆破施工对既有隧道影响的数值分析[D].天津:天津大学,2005.
[3]包德勇.小间距隧道爆破振动的影响分析[J].隧道工程,2008,8(11):89-92.
[4]阳生权.小线间距施工隧道爆破地震影响下既有隧道围岩线性动力分析[J].工程爆破,1998,4(1):1-6.
[5]胡建明.大跨度小净距公路隧道施工监测及围岩稳定性研究[D].重庆:重庆大学,2006.
[6]乔宪队.爆破震动对邻近隧洞的动力响应分析[D].长沙:中南大学,2007.
[2]钟建辉.邻近隧道爆破施工对既有隧道影响的数值分析[D].天津:天津大学,2005.
[3]包德勇.小间距隧道爆破振动的影响分析[J].隧道工程,2008,8(11):89-92.
[4]阳生权.小线间距施工隧道爆破地震影响下既有隧道围岩线性动力分析[J].工程爆破,1998,4(1):1-6.
[5]胡建明.大跨度小净距公路隧道施工监测及围岩稳定性研究[D].重庆:重庆大学,2006.
[6]乔宪队.爆破震动对邻近隧洞的动力响应分析[D].长沙:中南大学,2007.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心