基于PLAXIS 3D的隧道围岩结构仿真分析
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摘要
文章结合连云港主体港区东疏港高速公路隧道开挖实例工程项目,对隧道围岩结构的类型及失稳破坏特征进行了分析,通过采用有限元分析软件PLAXIS 3D TUNNEL(三维隧道软件)对实例隧道进行仿真计算分析,仿真结果表明:PLAXIS 3D TUNNEL软件可以很好的对隧道结构工程的变形和围岩结构稳定性进行仿真分析,输出的结果包括隧道总体位移、隧道平均应力、衬砌板轴向力等,当岩体及衬砌等参数变化时,衬砌轴应力也将随之变化。通过数据拟合可以得到隧道围岩衬砌轴应力关于隧道各个随机变量的数据变化函数和曲线,为隧道风险分析模型的建立及隧道围岩结构的失效概率分析提供数据参考。
Combined with the tunnel project of the East Dredge Highway in Lianyungang main port area,the types of tunnel surrounding rock structure and the characteristics of instability and failure are analyzed. The simulation calculation and analysis of the actual tunnel are carried out by finite element analysis software PLAXIS 3D TUNNEL(three-dimensional tunnel software). The simulation results show that: PLAXIS 3D TUNNEL software can simulate and analyze the deformation of tunnel structure engineering and the stability of surrounding rock structure. The output results include the total displacement of tunnel, the average stress of tunnel and the axial force of lining plate. When parameters such as rock mass and lining change, the lining axial stress will also change.The data variation function and curve of tunnel surrounding rock lining axial stress with respect to random variables can be obtained through data fitting, which can provide data reference for the establishment of tunnel risk analysis model and failure probability analysis of tunnel surrounding rock structure.
Combined with the tunnel project of the East Dredge Highway in Lianyungang main port area,the types of tunnel surrounding rock structure and the characteristics of instability and failure are analyzed. The simulation calculation and analysis of the actual tunnel are carried out by finite element analysis software PLAXIS 3D TUNNEL(three-dimensional tunnel software). The simulation results show that: PLAXIS 3D TUNNEL software can simulate and analyze the deformation of tunnel structure engineering and the stability of surrounding rock structure. The output results include the total displacement of tunnel, the average stress of tunnel and the axial force of lining plate. When parameters such as rock mass and lining change, the lining axial stress will also change.The data variation function and curve of tunnel surrounding rock lining axial stress with respect to random variables can be obtained through data fitting, which can provide data reference for the establishment of tunnel risk analysis model and failure probability analysis of tunnel surrounding rock structure.
引文
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[2]卫军,李昊,杨曼娟,等.基于ABAQUS平台的四渡河悬索桥隧道锚围岩稳定性分析[J].岩石力学与工程学报,2005,24(增1):4894-4899.
[3]孙振宇,张顶立,房倩,等.基于超前加固的深埋隧道围岩力学特性研究[J].工程力学,2018,35(2):92-104.
[4]徐奎,朱陈,于洋.浅埋软岩隧道围岩变形的分形结构分析[J].铁道建筑,2017,(07):71-73.
[5]彭立敏,刘小兵.隧道工程[M].长沙:中南大学出版社,2009.
[6]张芹,张琳,王亚伟,等.海底隧道衬砌结构静力分析[J].土工基础,2006,20(4):71-74.
[7]陈卫忠,伍国军,贾善坡. ABAQUS在隧道及地下工程中的应用[M].北京:中国水利水电出版社,2010.
[8] Barton, N.(2006).“Fault Zones and TBM. Geotechnical risk in rock tun nels”,ed. Matos;Sousa;Kleberger and Pinto,Taylor and Francis,pp.75-118.
[9]李术才,徐帮树,李树忱.海底隧道衬砌结构选型及参数优化研究[J].岩石力学与工程学报,2006,24(21):3894-3902.
[10]徐宾宾,张羽,司维.基于Plaxis3D的老鹰山隧道超长破碎带隧道开挖仿真分析[J].中国港湾建设,2017,37(9):16-20.