地铁隧道临近既有高架桥施工风险研究
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摘要
随着我国城市化进程的不断推进,地下轨道交通体系逐渐向综合化、立体化方向发展。在地下轨道交通网的建设过程中,不可避免地会遇到地铁施工临近既有高架桥的情况,从而对桥梁的稳定性造成不良影响。依托哈尔滨地铁3号线河梁街站～河松街站区间沿线侧穿哈药路、前进路高架桥为研究背景,针对地铁临近高架桥施工存在的风险问题,利用MIDAS-GTS计算软件模拟盾构法的施工过程及进行桩基托换时桥桩的内力、位移分布。模拟计算结果表明,通过采取合理的前期加固措施,地铁施工对高架桥的影响可以满足控制标准的要求。为了保证施工安全,提出了相应的施工技术措施,为地铁邻近既有桥梁的安全施工提供参考。
With the development of urbanization in China,the underground rail system is gradually toward a comprehensive and three-dimensional direction.In the process of construction of underground rail transit network,it will inevitably encounter the situation of subway construction near the existing viaduct,which causes adverse effects on bridges' stability.Based on the study background of the Heliangjie Station and Hexunjie Station of Harbin Metro Line 3,in the paper the construction risk of the viaduct near the subway are discussed,and MIDAS-GTS calculation software is used to simulate the shield construction process and the internal force and displacement distribution of the bridge pile.The simulation results show that the influence of subway construction on viaduct can meet the requirements of control standard by adopting reasonable pre-reinforcement measures.In order to ensure the safety of construction,the corresponding construction technology measures are proposed in the paper,which can provide reference for the safe construction of the metros adjacent to bridges.
With the development of urbanization in China,the underground rail system is gradually toward a comprehensive and three-dimensional direction.In the process of construction of underground rail transit network,it will inevitably encounter the situation of subway construction near the existing viaduct,which causes adverse effects on bridges' stability.Based on the study background of the Heliangjie Station and Hexunjie Station of Harbin Metro Line 3,in the paper the construction risk of the viaduct near the subway are discussed,and MIDAS-GTS calculation software is used to simulate the shield construction process and the internal force and displacement distribution of the bridge pile.The simulation results show that the influence of subway construction on viaduct can meet the requirements of control standard by adopting reasonable pre-reinforcement measures.In order to ensure the safety of construction,the corresponding construction technology measures are proposed in the paper,which can provide reference for the safe construction of the metros adjacent to bridges.
引文
[1]孙斌,陶连金,张印涛.岛式地铁车站施工对邻近桥梁桩基的影响分析[J].地下空间与工程学报,2009,5(1):163-168.
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[3]张云军,宰金珉,王旭东,等.隧道开挖对临近桩基影响的二维数值分析[J].地下空间与工程学报,2005,1(6):832-836.
[4]邵翔宇.地铁隧道穿越市政桥梁动态主动保护施工技术[J].建筑技术,2012,43(10):907-912.
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[7]侯学渊,廖少明.盾构隧道沉降预估[J].地下工程与隧道,1993,(4):24-32.
[8]廖少明,余炎,白廷辉,等.盾构隧道叠交施工引起的土层位移场分布规律[J].岩土工程学报,2006,28(4):485-490.
[9]朱逢斌,杨平,林水仙.盾构隧道开挖对邻近桩基影响研究[J].地下空间与工程学报,2010,6(2):369-374.
[10]刘枫,年廷凯,杨庆,等.隧道开挖对邻近桩基工作性能的影响研究[J].岩土力学,2008,29(s1):619-624.
[11]MORTON J D,KING K H.Effects of tunneling on the bearing capacity and settlement of piled foundations[C]//Proceedings of Tunneling,1979.
[12]Lee G T K,Ng C W W.Effects of Advancing Open Face Tunneling on an Existing Loaded Pile[J].Journal of Geotechnical&Geoenvironmental Engineering,2005,131(2):193-201.
[13]苏洁.浅埋暗挖法隧道施工对邻近桩基的影响及其控制[D].北京:北京交通大学,2009.
[14]周正宇.地铁邻近既有桥梁施工影响分析及主动防护研究[D].北京:北京交通大学,2012.
[2]何海健,项彦勇,刘维宁.地铁施工引起邻近桥梁桩基差异沉降的概率分析[J].岩石力学与工程学报,2007,26(s1):3257-3265.
[3]张云军,宰金珉,王旭东,等.隧道开挖对临近桩基影响的二维数值分析[J].地下空间与工程学报,2005,1(6):832-836.
[4]邵翔宇.地铁隧道穿越市政桥梁动态主动保护施工技术[J].建筑技术,2012,43(10):907-912.
[5]Goh A T C,Wong K S,Teh C I,et al.Pile Response Adjacent to Braced Excavation[J].Journal of Geotechnical&Geoenvironmental Engineering,2003,129(4):383-386.
[6]LOGANATHAN N,POULOS H G.Tunnelling induced ground deformation and their effects on adjacent piles[C]//Thenth Australian Tunnelling Conference.
[7]侯学渊,廖少明.盾构隧道沉降预估[J].地下工程与隧道,1993,(4):24-32.
[8]廖少明,余炎,白廷辉,等.盾构隧道叠交施工引起的土层位移场分布规律[J].岩土工程学报,2006,28(4):485-490.
[9]朱逢斌,杨平,林水仙.盾构隧道开挖对邻近桩基影响研究[J].地下空间与工程学报,2010,6(2):369-374.
[10]刘枫,年廷凯,杨庆,等.隧道开挖对邻近桩基工作性能的影响研究[J].岩土力学,2008,29(s1):619-624.
[11]MORTON J D,KING K H.Effects of tunneling on the bearing capacity and settlement of piled foundations[C]//Proceedings of Tunneling,1979.
[12]Lee G T K,Ng C W W.Effects of Advancing Open Face Tunneling on an Existing Loaded Pile[J].Journal of Geotechnical&Geoenvironmental Engineering,2005,131(2):193-201.
[13]苏洁.浅埋暗挖法隧道施工对邻近桩基的影响及其控制[D].北京:北京交通大学,2009.
[14]周正宇.地铁邻近既有桥梁施工影响分析及主动防护研究[D].北京:北京交通大学,2012.