北京地铁新机场线下穿京沪高速铁路特大桥施工安全控制研究
|
摘要
本文依托北京地铁新机场线下穿京沪铁路特大桥工程,建立计算模型,分析了施工过程对既有铁路桥梁结构的影响及隧道结构自身的安全性、稳定性。研究结果表明:(1)采取防护措施后,隧道施工引起桥梁墩柱的竖向位移、差异沉降、水平位移最大值等变形值均在相关规范允许范围内;(2)通过采取管幕及中隔壁等有效防护措施,隧道初支结构的轴力、弯矩极值有所减小,提高了安全系数,能达到当地安全控制标准。研究成果可为地铁下穿既有运营铁路桥梁的隧道施工及防护方案提供一定的参考借鉴。
This paper takes Beijing Metro new airport line underneath passing Beijing-Shanghai railway bridge as an example,calculation model is built,the influence of construction on existing railway bridge structures and the safety and stability of tunnel structures are analyzed. The results show that the vertical displacement,differential settlement and maximum horizontal displacement caused by tunnel construction are all within the allowable range of relevant codes. By taking effective protective measures such as pipe curtain and median lamella,the extremum of axial force and bending moment of the initial support structure of the tunnel has been reduced,the safety factor has been improved,and the local safety control standard can be reached. The research results provide some references for the tunnel construction and protection schemes of Metro underneath passing the existing operating railway bridges.
This paper takes Beijing Metro new airport line underneath passing Beijing-Shanghai railway bridge as an example,calculation model is built,the influence of construction on existing railway bridge structures and the safety and stability of tunnel structures are analyzed. The results show that the vertical displacement,differential settlement and maximum horizontal displacement caused by tunnel construction are all within the allowable range of relevant codes. By taking effective protective measures such as pipe curtain and median lamella,the extremum of axial force and bending moment of the initial support structure of the tunnel has been reduced,the safety factor has been improved,and the local safety control standard can be reached. The research results provide some references for the tunnel construction and protection schemes of Metro underneath passing the existing operating railway bridges.
引文
[1]郭宏博,李少友.新建地铁车站大断面密贴暗挖下穿既有地铁车站施工方案[J].施工技术,2018,47(S1):576-580.GUO Hongbo,LI Shaoyou. Construction Scheme of New TransferMetro Station Large Section[J]. Construction Technology,2018,47(S1):576-580.
[2]李吉林.地铁盾构下穿高速铁路桥梁结构安全性评估研究[J].高速铁路技术,2018,9(1):61-65.LI Jilin. Study on Safety Assessment of Subway Shield TunnelingHigh-speed Railway Bridge Structure[J]. High Speed RailwayTechnology,2018,9(1):61-65.
[3]李克钢,马琳,曹勇,等.在建车站下穿既有车站开挖过程仿真及监测对比分析[J].安全与环境学报,2018,18(4):1339-1344.LI Kegang,MA Lin,CAO Yong,et al. Comparative Simulation andMeasurement of the Excavation Process of the Subway Constructionbeneath the Currently Existing Subway Stations[J]. Journal of Safetyand Environment,2018,18(4):1339-1344.
[4]崔光耀,王明年,路军富,等.客运专线机场路隧道下穿高架桥近接桩基施工位移控制技术[J].中国铁道科学,2011,19(3):68-73.CUI Guangyao,WANG Mingnian,LU Junfu,et al. Adjacent PileFoundation Construction Displacement Control Technology ofPassenger Dedicated Line Jichang Road Tunnel Crossing underViaducts[J]. China Railway Science,2011,19(3):68-73.
[5]胡锡鹏,刘拴锭,马思伟,等.隧道施工对临近桩基影响的数值分析[J].城市轨道交通研究,2018,21(8):125-128.HU Xipeng,LIU Shuanding,MA Siwei,et al. Numerical Analysis ofTunnel Construction Influence on the Adjacent Pile Foundation[J].Urban Mass Transit,2018,21(8):125-128.
[6]王明年,张晓军,苟明中,等.盾构隧道掘进全过程三维模拟方法及重叠段近接分区研究[J].岩土力学,2012,34(1):273-279.WANG Mingnian,ZHANG Xiaojun,GOU Mingzhong,et al. Methodof Three-dimensional Simulation for Shield Tunneling Process andStudy of Adjacent Partition of Overlapped Segment[J]. Rock andSoil Mechanics,2012,34(1):273-279.
[7]李明.暗挖地铁隧道下穿既有桥梁的大承台托换技术研究[J].铁道建筑,2015,55(5):83-85.LI Ming. Underpinning Technology of Underpinning Subway TunnelUnderneath Existing Bridges[J]. Railway Engineering, 2015,55(5):83-85.
[8]李旺旺,韦宏鹄.北京昌平线二期地铁盾构侧穿桥梁沉降监测分析[J].隧道建设,2015,35(2):139-143.LI Wangwang, WEI Honghu. Analysis on Settlement of BridgeCaused by Side Crossing of Shield:Case Study on Shield Tunneling ofPhase 2 of Changping Line of Beijing Metro[J]. TunnelConstruction,2015,35(2):139-143.
[9] TB 10621-2014髙速铁路设计规范[S].TB 10621-2014 Code for Design of High Speed Railway[S].
[10] TB 10182-2017公路与市政工程下穿高速铁路技术规程[S].TB 10182-2017 Technical Specification for Highway and MunicipalEngineering under Crossing High Speed Railway[S].
[2]李吉林.地铁盾构下穿高速铁路桥梁结构安全性评估研究[J].高速铁路技术,2018,9(1):61-65.LI Jilin. Study on Safety Assessment of Subway Shield TunnelingHigh-speed Railway Bridge Structure[J]. High Speed RailwayTechnology,2018,9(1):61-65.
[3]李克钢,马琳,曹勇,等.在建车站下穿既有车站开挖过程仿真及监测对比分析[J].安全与环境学报,2018,18(4):1339-1344.LI Kegang,MA Lin,CAO Yong,et al. Comparative Simulation andMeasurement of the Excavation Process of the Subway Constructionbeneath the Currently Existing Subway Stations[J]. Journal of Safetyand Environment,2018,18(4):1339-1344.
[4]崔光耀,王明年,路军富,等.客运专线机场路隧道下穿高架桥近接桩基施工位移控制技术[J].中国铁道科学,2011,19(3):68-73.CUI Guangyao,WANG Mingnian,LU Junfu,et al. Adjacent PileFoundation Construction Displacement Control Technology ofPassenger Dedicated Line Jichang Road Tunnel Crossing underViaducts[J]. China Railway Science,2011,19(3):68-73.
[5]胡锡鹏,刘拴锭,马思伟,等.隧道施工对临近桩基影响的数值分析[J].城市轨道交通研究,2018,21(8):125-128.HU Xipeng,LIU Shuanding,MA Siwei,et al. Numerical Analysis ofTunnel Construction Influence on the Adjacent Pile Foundation[J].Urban Mass Transit,2018,21(8):125-128.
[6]王明年,张晓军,苟明中,等.盾构隧道掘进全过程三维模拟方法及重叠段近接分区研究[J].岩土力学,2012,34(1):273-279.WANG Mingnian,ZHANG Xiaojun,GOU Mingzhong,et al. Methodof Three-dimensional Simulation for Shield Tunneling Process andStudy of Adjacent Partition of Overlapped Segment[J]. Rock andSoil Mechanics,2012,34(1):273-279.
[7]李明.暗挖地铁隧道下穿既有桥梁的大承台托换技术研究[J].铁道建筑,2015,55(5):83-85.LI Ming. Underpinning Technology of Underpinning Subway TunnelUnderneath Existing Bridges[J]. Railway Engineering, 2015,55(5):83-85.
[8]李旺旺,韦宏鹄.北京昌平线二期地铁盾构侧穿桥梁沉降监测分析[J].隧道建设,2015,35(2):139-143.LI Wangwang, WEI Honghu. Analysis on Settlement of BridgeCaused by Side Crossing of Shield:Case Study on Shield Tunneling ofPhase 2 of Changping Line of Beijing Metro[J]. TunnelConstruction,2015,35(2):139-143.
[9] TB 10621-2014髙速铁路设计规范[S].TB 10621-2014 Code for Design of High Speed Railway[S].
[10] TB 10182-2017公路与市政工程下穿高速铁路技术规程[S].TB 10182-2017 Technical Specification for Highway and MunicipalEngineering under Crossing High Speed Railway[S].