2014年9月下 施工技术 第43卷第18期 CONSTRUCTION TECHNOLOGY 69 D0I:10.7672/5js2014180069 考虑掘进效应的隧道变形有限元分析* 汪彪，范亦农2，柴军瑞1 (1.西安理工大学陕西省西北早区生态水利工程重点实验室，陕西西安710048； 2.中国水利水电建设集团十五工程局有限公司，陕西西安710068) [摘要]通过数值模拟法对隧道施工全过程进行了三维弹塑性分析，尤其对不同施工条件下的隧道竖直位移变化 进行了分析.结果表明：在掘进面到达前，围岩会产生前期位移收敛，本算例前期位移量为总位移量的32.7%；隧 道变形受围岩级别、埋深及半径的影响，围岩劣化条件下的位移增量主要发生在隧道断面开挖前，半径增大条件下 的位移增量主要发生在隧道断面开挖后；V级围岩条件下，前期位移量显著增大；隧道变形稳定所需距离主要受半 径的影响，稳定距离S与半径R关系式为S=1.2R. [关键词]隧道工程：掘进效应；前期收敛；有限元分析 [中图分类号]U452 [文献标识码]A [文章编号]1002-8498(2014)18-0069-05 Finite Element Analysis of Tunnel Deformation Considering the Excavation Disturbance Wang Biao' Fan Yinong2 Chai Junrui' (1.State Key Laboratory of Eco-hydraulic Engineering in Shaanxi Xi'an University of Technology Xi'an Shaanxi 710048 China;2.Sinohydro Corporation Engineering Bureau 15 Co.Lad.Xi'an Shaanxi 710068 China Abstract:A 3D finite element analysis is conducted to simulate the conventional procedure of tunnel excavation especially the tunnels vertical displacement change when tunnel is constructed under different conditions is analyzed.The results prove that there is a preconvergence displacement ahead of the excavation face and its value account for 32.7%in the maximum displacement value in this case.For the influence of surrounding rock burying depth and radius effect the displacement caused by surrounding rock deterioration mainly occurred ahead of the exeavation face and displacement caused by the radius increasing mainly oceurred behind the face.The preconvergence displacement i...
考虑掘进效应的隧道变形有限元分析.pdf
