盾构隧道施工对已建平行隧道变形和附加内力的影响研究
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摘要
以盾构隧道装配式衬砌结构为研究对象,引入各向刚度不等的连续材料模型,按变形等效原则对不连续的隧道结构横向和纵向的刚度分别进行了等效折减,采用室内相似模型试验和三维有限元数值分析相结合的手段,以广州地铁三号线大沥区间盾构隧道工程为背景,对新建隧道施工所引起的已建平行隧道纵向变位、纵向附加轴力和弯矩、横向变形、横向附加轴力和弯矩进行深入研究,探讨和揭示围岩条件,隧道净距,顶推力等因素对已建平行隧道的变形和附加内力分布变化规律的影响。研究结果表明,新建盾构隧道施工所引起的已建隧道的影响主要集中于邻近新建隧道侧的拱腰附近,在软弱地层保持一定的隧道净距是必要的,盾构顶推力需控制在一定范围内,具体视围岩、净距以及可能造成的位移、相对变形和附加内力情况而定。
Taking the assembly lining structure of shield tunnel as object of study,the continuum material model with the tunnel circumferential and longitudinal stiffness being discounted is introduced based on equivalent deformation principle.With the Dali interzone of the project Guangzhou metro line 3 as research background,laboratory model test and 3D finite element analysis are both applied to the research on the influence of shield tunnel construction on the constructed parallel one.The longitudinal secondary,longitudinal additional axial force and bending moment,circumferential deformation,circumferential secondary axial force and bending moment of the constructed tunnel brought by the newly parallel one are investigated.Factors such as surrounding soil,clear distance,jacking force,etc.,are also discussed in the distribution and variation of displacement and secondary inner forces of the constructed tunnel during shield tunnel construction.The results indicate that the influence of the newly constructed tunnel mainly occurs on the hance of the constructed tunnel close to the new one,that it is necessary to keep a certain clear distance between two tunnels in the weak stratum and that the jacking force of the shield should be controlled in a certain range,according to surrounding soil,clear distance,possible displacement,relative deformation and secondary inner forces.
Taking the assembly lining structure of shield tunnel as object of study,the continuum material model with the tunnel circumferential and longitudinal stiffness being discounted is introduced based on equivalent deformation principle.With the Dali interzone of the project Guangzhou metro line 3 as research background,laboratory model test and 3D finite element analysis are both applied to the research on the influence of shield tunnel construction on the constructed parallel one.The longitudinal secondary,longitudinal additional axial force and bending moment,circumferential deformation,circumferential secondary axial force and bending moment of the constructed tunnel brought by the newly parallel one are investigated.Factors such as surrounding soil,clear distance,jacking force,etc.,are also discussed in the distribution and variation of displacement and secondary inner forces of the constructed tunnel during shield tunnel construction.The results indicate that the influence of the newly constructed tunnel mainly occurs on the hance of the constructed tunnel close to the new one,that it is necessary to keep a certain clear distance between two tunnels in the weak stratum and that the jacking force of the shield should be controlled in a certain range,according to surrounding soil,clear distance,possible displacement,relative deformation and secondary inner forces.
引文
[1]Working Group No.2,International Tunneling Association.Guidelines for the design of shield tunnel lining[J].Tunneling and Underground Space Technology,2000,15(3):303–331.
[2]KOYAMA Y.Present status and technology of shield tunneling method in Japan[J].Tunnelling and Underground Space Technology,2003,18(2/3):145–159.
[3]朱世友.国内地铁盾构区间隧道管片结构设计的现状与发展[J].现代隧道技术,2002,39(6):23–28.(ZHU Shiyou.Present status and development of segment design for the shield driven running tunnel of metro[J].Modern Tunnelling Technology,2002,39(6):23–28.(in Chinese))
[4]曾东洋,何川.拼装方式对盾构隧道衬砌结构变形和内力的影响分析[J].现代隧道技术,2005,42(2):1–6.(ZENG Dongyang,HE Chuan.Analysis of the influence of segment assembling methods on the deformation and internal forces in the lining of a shield tunnel[J].Modern Tunnelling Technology,2005,42(2):1–6.(in Chinese))
[5]张志强,何川.南京地铁区间盾构隧道“下穿”玄武湖公路隧道施工的关键技术研究[J].岩土力学,2005,26(11):1 711–1 716.(ZHANG Zhiqiang,HE Chuan.Research on key technique of shield tunnel construction beneath adjacent existing highway tunnel[J].Rock and Soil Mechanics,2005,26(11):1 711–1 716.(in Chinese))
[6]范厚彬.基于层叠模型的盾构隧道施工对周围环境的影响[J].岩石力学与工程学报,2005,24(6):1 092.(FAN Houbin.A study of the influence of shield tunnelling on surrounding environment based on the overlay model[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(6):1 092.(in Chinese))
[7]王敏强,陈胜宏.盾构推进隧道结构三维非线性有限元仿真[J].岩石力学与工程学报,2002,21(2):228–232.(WANG Minqiang,CHEN Shenghong.Three-dimensional nonlinear finite element simulation of tunnel structure for moving-forward shield[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(2):228–232.(in Chinese))
[8]赵旭峰,王春苗,孙景林,等.盾构近接隧道施工力学行为分析[J].岩土力学,2007,28(2):409–414.(ZHAO Xufeng,WANG Chunmiao,SUN Jinglin,et al.Analysis of mechanical action of shield driving for approaching excavation[J].Rock and Soil Mechanics,2007,28(2):409–414.(in Chinese))
[9]陈俊生,莫海鸿.盾构隧道管片施工阶段力学行为的三维有限元分析[J].岩石力学与工程学报,2006,25(增2):3 482–3 489.(CHEN Junsheng,MO Haihong.Three-dimensional finite element analysis of mechanical behaviors of shield tunnel segment during construction[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3 482–3 489.(in Chinese))
[10]曾东洋.盾构隧道衬砌结构力学行为及施工对环境的影响研究[博士学位论文][D].成都:西南交通大学,2005.(ZENG Dongyang.Research on the mechanical behavior of shield tunnel lining structure and influences on the environment in construction[Ph.D.Thesis][D].Chengdu:Southwest Jiaotong University,2005.(in Chinese))
[11]何川.シ-ルドトンネル縱断方向の地震時舉動に関する研究[博士学位论文][D].东京:早稻田大学,1999:61–65.(HE Chuan.A study on the seismic behavior in the longitudinal direction of shield tunnels[Ph.D.Thesis][D].Tokyo:Waseda University,1999:61–65.(in Japanese))
[12]鉄道総合技術研究所.鉄道構造物等設計標準.同解説(シルードトンネル)[M].[S.l.]:丸善株式会社,1997.(Railway synthesis technology research institute.Standard and explanation for railway structures design(shield tunnel)[M].[S.l.]:The Maruzen Corporation,1997.(in Japanese))
[13]黄宏伟,臧小龙.盾构隧道纵向变形性态研究分析[J].地下空间,2002,22(3):244–251.(HUANG Hongwei,ZANG Xiaolong.Research and analysis of longitudinal deformation characteristics of shield tunnel[J].Underground Space,2002,22(3):244–251.(in Chinese))
[14]シルード工法の調査.設計から施工まで編集委員会.シルード工法の調査.設計から施工まで[M].[S.l.]:地盤工学会(日),1997.(Editing committee of investigation of shielding method from design to construction.Investigation of shielding method from design to construction[M].[S.l.]:The Japanese Geotechnical Society,1997.(in Japanese))
[15]山崎剛.地盤变状の实態と评価解析手法(その3)[J].トンネルと地下,2003,34(4):366–372.(YAMAZAKY K.Numerical analysis for representation and estimate of surrounding rock′s stability[J].Tunnel and Underground Engineering,2003,34(4):366–372.(in Japanese))
[2]KOYAMA Y.Present status and technology of shield tunneling method in Japan[J].Tunnelling and Underground Space Technology,2003,18(2/3):145–159.
[3]朱世友.国内地铁盾构区间隧道管片结构设计的现状与发展[J].现代隧道技术,2002,39(6):23–28.(ZHU Shiyou.Present status and development of segment design for the shield driven running tunnel of metro[J].Modern Tunnelling Technology,2002,39(6):23–28.(in Chinese))
[4]曾东洋,何川.拼装方式对盾构隧道衬砌结构变形和内力的影响分析[J].现代隧道技术,2005,42(2):1–6.(ZENG Dongyang,HE Chuan.Analysis of the influence of segment assembling methods on the deformation and internal forces in the lining of a shield tunnel[J].Modern Tunnelling Technology,2005,42(2):1–6.(in Chinese))
[5]张志强,何川.南京地铁区间盾构隧道“下穿”玄武湖公路隧道施工的关键技术研究[J].岩土力学,2005,26(11):1 711–1 716.(ZHANG Zhiqiang,HE Chuan.Research on key technique of shield tunnel construction beneath adjacent existing highway tunnel[J].Rock and Soil Mechanics,2005,26(11):1 711–1 716.(in Chinese))
[6]范厚彬.基于层叠模型的盾构隧道施工对周围环境的影响[J].岩石力学与工程学报,2005,24(6):1 092.(FAN Houbin.A study of the influence of shield tunnelling on surrounding environment based on the overlay model[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(6):1 092.(in Chinese))
[7]王敏强,陈胜宏.盾构推进隧道结构三维非线性有限元仿真[J].岩石力学与工程学报,2002,21(2):228–232.(WANG Minqiang,CHEN Shenghong.Three-dimensional nonlinear finite element simulation of tunnel structure for moving-forward shield[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(2):228–232.(in Chinese))
[8]赵旭峰,王春苗,孙景林,等.盾构近接隧道施工力学行为分析[J].岩土力学,2007,28(2):409–414.(ZHAO Xufeng,WANG Chunmiao,SUN Jinglin,et al.Analysis of mechanical action of shield driving for approaching excavation[J].Rock and Soil Mechanics,2007,28(2):409–414.(in Chinese))
[9]陈俊生,莫海鸿.盾构隧道管片施工阶段力学行为的三维有限元分析[J].岩石力学与工程学报,2006,25(增2):3 482–3 489.(CHEN Junsheng,MO Haihong.Three-dimensional finite element analysis of mechanical behaviors of shield tunnel segment during construction[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3 482–3 489.(in Chinese))
[10]曾东洋.盾构隧道衬砌结构力学行为及施工对环境的影响研究[博士学位论文][D].成都:西南交通大学,2005.(ZENG Dongyang.Research on the mechanical behavior of shield tunnel lining structure and influences on the environment in construction[Ph.D.Thesis][D].Chengdu:Southwest Jiaotong University,2005.(in Chinese))
[11]何川.シ-ルドトンネル縱断方向の地震時舉動に関する研究[博士学位论文][D].东京:早稻田大学,1999:61–65.(HE Chuan.A study on the seismic behavior in the longitudinal direction of shield tunnels[Ph.D.Thesis][D].Tokyo:Waseda University,1999:61–65.(in Japanese))
[12]鉄道総合技術研究所.鉄道構造物等設計標準.同解説(シルードトンネル)[M].[S.l.]:丸善株式会社,1997.(Railway synthesis technology research institute.Standard and explanation for railway structures design(shield tunnel)[M].[S.l.]:The Maruzen Corporation,1997.(in Japanese))
[13]黄宏伟,臧小龙.盾构隧道纵向变形性态研究分析[J].地下空间,2002,22(3):244–251.(HUANG Hongwei,ZANG Xiaolong.Research and analysis of longitudinal deformation characteristics of shield tunnel[J].Underground Space,2002,22(3):244–251.(in Chinese))
[14]シルード工法の調査.設計から施工まで編集委員会.シルード工法の調査.設計から施工まで[M].[S.l.]:地盤工学会(日),1997.(Editing committee of investigation of shielding method from design to construction.Investigation of shielding method from design to construction[M].[S.l.]:The Japanese Geotechnical Society,1997.(in Japanese))
[15]山崎剛.地盤变状の实態と评価解析手法(その3)[J].トンネルと地下,2003,34(4):366–372.(YAMAZAKY K.Numerical analysis for representation and estimate of surrounding rock′s stability[J].Tunnel and Underground Engineering,2003,34(4):366–372.(in Japanese))
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