盾构管片裂损成因分析及结构安全性评价
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摘要
依托实际工程,通过现场调查、跟踪监测和数值模拟的方法,对盾构管片施工过程中出现裂损的成因以及裂损后管片结构的安全性进行具体分析。研究结果表明:依托工程中漏水漏沙等水土流失导致管片背后岩土体支撑减弱,是引起管片结构应力集中进而出现局部裂损的主要原因。经洞内外注浆加固处理和管片结构局部修复后,未见新的裂缝发展,各项监测指标亦趋于稳定,管片结构是安全的,且能够满足后续工序安全施工的需要。采取的应急处理措施是有效的,可为类似情况参考。
According to the actual project, the causes analysis and safety evaluation of cracking shield segment were conducted by field investigation, tracking monitoring and numerical simulation methods. The results indicate that the main cause of shield segment crack is the water and soil loss induced by leakage, which leads to weaken the support of rock and earth mass at back of the segments. No new crack appears and monitoring indexes tend to stabilize after grouting inside and outside the tunnel, and repairing the cracking segments. And the segment structure is safe and can satisfy the subsequent handling needs. Therefore, the measurements are reliable and can provide reference for similar condition.
According to the actual project, the causes analysis and safety evaluation of cracking shield segment were conducted by field investigation, tracking monitoring and numerical simulation methods. The results indicate that the main cause of shield segment crack is the water and soil loss induced by leakage, which leads to weaken the support of rock and earth mass at back of the segments. No new crack appears and monitoring indexes tend to stabilize after grouting inside and outside the tunnel, and repairing the cracking segments. And the segment structure is safe and can satisfy the subsequent handling needs. Therefore, the measurements are reliable and can provide reference for similar condition.
引文
[1]中国城市轨道交通协会.城市轨道交通2015年度统计和分析报告[R].中国城市轨道交通协会信息,2016(2):1-27.China Association of Metros(CAM).2015 annual report of China urban mass transit[R].China Association of Metros,2016(2):15-19.
[2]中国城市轨道交通协会.城市轨道交通2014年度统计和分析报告[R].中国城市轨道交通协会信息,2015(2):1-14.China Association of Metros(CAM).2014 annual report of China urban mass transit[R].China Association of Metros,2015(2):1-14.
[3]蔡明生.基于断裂力学的盾构隧道管片裂损破坏机理研究[J].科技风,2016(11):163-164.CAI Mingsheng.Study on the damage mechanism of shield tunnel segments based on fracture mechanics[J].Technology Wind,2016(11):163-164.
[4]谭忠盛,洪开荣,万姜林,等.软硬不均地层盾构姿态控制及管片防裂损技术[J].中国工程科学,2006,8(12):92-96.TAN Zhongsheng,HONG Kairong,WAN Jianglin,et al.Shield driven tunneling in the complex layer:direction control of shield and preventing segment crack[J].Engineering Science,2006,8(12):92-96.
[5]杨雨冰,谢雄耀.基于断裂力学的盾构隧道管片结构开裂破损机制探讨[J].岩石力学与工程学报,2015,34(10):2114-2124.YANG Yubing,XIE Xiongyao.Breaking mechanism of lining in shield tunnel based on fracture mechanics[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(10):2114-2124.
[6]李国栋.海相饱和软土地层盾构管片开裂分析及处治[J].西部交通科技,2015(1):43-46.LI Guodong.Shield tube-sheet cracking analysis and treatment of marine saturated soft soil layer[J].Western China Communication Science and Technology,2015(1):43-46.
[7]孙鹏.隧道管片开裂状态下的运营安全性评估[J].建筑监督检测与造价,2014,7(5):34-38.SUN Peng.The operating security assessment of tunnel segments with cracking[J].Supervision Test and Cost of Construction,2014,7(5):34-38.
[8]张洪彬,张国祥,安关峰,等.盾构隧道已开裂管片的受力变形特性[J].土木建筑与环境工程,2014,36(3):52-58.ZHANG Hongbin,ZHANG Guoxiang,AN Guanfeng,et al.Mechanical and deformation characteristics on shield tunnel segment with cracks[J].Journal of Civil,Architectural and Environmental Engineering,2014,36(3):52-58.
[9]杨旭,高永.地铁运营期盾构隧道管片开裂原因探讨[J].城市轨道交通研究,2012,15(7):26-29.YANG Xu,GAO Yong.Reasons of segment cracking on operation subway shield tunnel[J].Urban Mass Transit,2012,15(7):26-29.
[10]刘鹏,张玉成,姚捷,等.盾构隧道管片开裂原因及数值仿真[J].土木工程与管理学报,2011,28(2):44-49.LIU Peng,ZHANG Yucheng,YAO Jie,et al.Cracking reason of segments of shield tunnel and relevant numerical simulation analysis[J].Journal of Civil Engineering and Management,2011,28(2):44-49.
[11]吴坤,栾文伟.盾构法施工中隧道管片开裂原因分析及应对措施[J].市政技术,2011,29(2):93-95.WU Kun,LUAN Wenwei.Causes analysis and countermeasures for lining segment cracking in shield tunneling[J].Municipal Engineering Technology,2011,29(2):93-95.
[12]彭飞,田文杰.盾构隧道管片开裂原因分析及应对措施[J].建筑技术,2009,40(11):1013-1015.PENG Fei,TIAN Wenjie.Analysis on reasons for ruptures of shield tunnel pipe segment and relevant measures[J].Architechture Technology,2009,40(11):1013-1015.
[13]陈俊生,莫海鸿,梁仲元.盾构隧道施工阶段管片局部开裂原因初探[J].岩石力学与工程学报,2006,25(5):906-910.CHEN Junsheng,MO Haihong,LIANG Zhongyuan.Study on local cracking of segments in shield tunnel during construction[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(5):906-910.
[14]郑永来,韩文星,童琪华,等.软土地铁隧道纵向不均匀沉降导致的管片接头环缝开裂研究[J].岩石力学与工程学报,2005(24):4552-4558.ZHENG Yonglai,HAN Wenxing,TONG Qihua,et al.Study on longitudinal crack of shield tunnel segment joint due to asymmetric settlement in soft soil[J].Chinese Journal of Rock Mechanics and Engineering,2005(24):4552-4558.
[15]SHI Chenghua,CAO Chengyong,LEI Mingfeng,et al.Time-dependent performance and constitutive model of EPDM rubber gasket used for tunnel segment joints[J].Tunnelling and Underground Space Technology,2015(50):490-498.
[16]王国富,孙捷城,路林海,等.曲线盾构隧道施工稳定性及致险水平研究[J].铁道科学与工程学报,2017,14(3):575-584.WANG Guofu,SUN Jiecheng,LU Linhai,et al.Study on stability influential factors and risk level classification of shield tunnel with small radius curve[J].Journal of Railway Science and Engineering,2017,14(3):575-584.
[17]柳献,张维熙,王东方.类矩形盾构隧道纵缝受剪性能试验研究[J].铁道科学与工程学报,2016,13(9):1767-1775.LIU Xian,ZHANG Weixi,WANG Dongfang.Experimental study on shear performance of longitudinal joint in quasi-rectangular shield tunnel[J].Journal of Railway Science and Engineering,2016,13(9):1767-1775.
[18]SHI Chenghua,CAO Chengyong,LEI Mingfeng,et al.Effects of lateral unloading on the mechanical and deformation performance of shield tunnel segment joints[J].Tunnelling and Underground Space Technology,2016(51):175-188.
[19]GB 50010—2010,混凝土结构设计规范[S].GB 50010—2010,Code for design of concrete structures[S].
[20]GB/T3098.1—2000,螺栓、螺钉和螺柱的材料要求[S].GB/T3098.1—2000,Materials requirements of bolts,screws and stud[S].
[21]GB 50446—2008,盾构法隧道施工与验收规范[S].GB 50446—2008,Code for construction and acceptance of shield tunneling method[S].
[22]GB 50157—2003,地铁设计规范[S].GB 50157—2003,Code for the design of metro[S].
[2]中国城市轨道交通协会.城市轨道交通2014年度统计和分析报告[R].中国城市轨道交通协会信息,2015(2):1-14.China Association of Metros(CAM).2014 annual report of China urban mass transit[R].China Association of Metros,2015(2):1-14.
[3]蔡明生.基于断裂力学的盾构隧道管片裂损破坏机理研究[J].科技风,2016(11):163-164.CAI Mingsheng.Study on the damage mechanism of shield tunnel segments based on fracture mechanics[J].Technology Wind,2016(11):163-164.
[4]谭忠盛,洪开荣,万姜林,等.软硬不均地层盾构姿态控制及管片防裂损技术[J].中国工程科学,2006,8(12):92-96.TAN Zhongsheng,HONG Kairong,WAN Jianglin,et al.Shield driven tunneling in the complex layer:direction control of shield and preventing segment crack[J].Engineering Science,2006,8(12):92-96.
[5]杨雨冰,谢雄耀.基于断裂力学的盾构隧道管片结构开裂破损机制探讨[J].岩石力学与工程学报,2015,34(10):2114-2124.YANG Yubing,XIE Xiongyao.Breaking mechanism of lining in shield tunnel based on fracture mechanics[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(10):2114-2124.
[6]李国栋.海相饱和软土地层盾构管片开裂分析及处治[J].西部交通科技,2015(1):43-46.LI Guodong.Shield tube-sheet cracking analysis and treatment of marine saturated soft soil layer[J].Western China Communication Science and Technology,2015(1):43-46.
[7]孙鹏.隧道管片开裂状态下的运营安全性评估[J].建筑监督检测与造价,2014,7(5):34-38.SUN Peng.The operating security assessment of tunnel segments with cracking[J].Supervision Test and Cost of Construction,2014,7(5):34-38.
[8]张洪彬,张国祥,安关峰,等.盾构隧道已开裂管片的受力变形特性[J].土木建筑与环境工程,2014,36(3):52-58.ZHANG Hongbin,ZHANG Guoxiang,AN Guanfeng,et al.Mechanical and deformation characteristics on shield tunnel segment with cracks[J].Journal of Civil,Architectural and Environmental Engineering,2014,36(3):52-58.
[9]杨旭,高永.地铁运营期盾构隧道管片开裂原因探讨[J].城市轨道交通研究,2012,15(7):26-29.YANG Xu,GAO Yong.Reasons of segment cracking on operation subway shield tunnel[J].Urban Mass Transit,2012,15(7):26-29.
[10]刘鹏,张玉成,姚捷,等.盾构隧道管片开裂原因及数值仿真[J].土木工程与管理学报,2011,28(2):44-49.LIU Peng,ZHANG Yucheng,YAO Jie,et al.Cracking reason of segments of shield tunnel and relevant numerical simulation analysis[J].Journal of Civil Engineering and Management,2011,28(2):44-49.
[11]吴坤,栾文伟.盾构法施工中隧道管片开裂原因分析及应对措施[J].市政技术,2011,29(2):93-95.WU Kun,LUAN Wenwei.Causes analysis and countermeasures for lining segment cracking in shield tunneling[J].Municipal Engineering Technology,2011,29(2):93-95.
[12]彭飞,田文杰.盾构隧道管片开裂原因分析及应对措施[J].建筑技术,2009,40(11):1013-1015.PENG Fei,TIAN Wenjie.Analysis on reasons for ruptures of shield tunnel pipe segment and relevant measures[J].Architechture Technology,2009,40(11):1013-1015.
[13]陈俊生,莫海鸿,梁仲元.盾构隧道施工阶段管片局部开裂原因初探[J].岩石力学与工程学报,2006,25(5):906-910.CHEN Junsheng,MO Haihong,LIANG Zhongyuan.Study on local cracking of segments in shield tunnel during construction[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(5):906-910.
[14]郑永来,韩文星,童琪华,等.软土地铁隧道纵向不均匀沉降导致的管片接头环缝开裂研究[J].岩石力学与工程学报,2005(24):4552-4558.ZHENG Yonglai,HAN Wenxing,TONG Qihua,et al.Study on longitudinal crack of shield tunnel segment joint due to asymmetric settlement in soft soil[J].Chinese Journal of Rock Mechanics and Engineering,2005(24):4552-4558.
[15]SHI Chenghua,CAO Chengyong,LEI Mingfeng,et al.Time-dependent performance and constitutive model of EPDM rubber gasket used for tunnel segment joints[J].Tunnelling and Underground Space Technology,2015(50):490-498.
[16]王国富,孙捷城,路林海,等.曲线盾构隧道施工稳定性及致险水平研究[J].铁道科学与工程学报,2017,14(3):575-584.WANG Guofu,SUN Jiecheng,LU Linhai,et al.Study on stability influential factors and risk level classification of shield tunnel with small radius curve[J].Journal of Railway Science and Engineering,2017,14(3):575-584.
[17]柳献,张维熙,王东方.类矩形盾构隧道纵缝受剪性能试验研究[J].铁道科学与工程学报,2016,13(9):1767-1775.LIU Xian,ZHANG Weixi,WANG Dongfang.Experimental study on shear performance of longitudinal joint in quasi-rectangular shield tunnel[J].Journal of Railway Science and Engineering,2016,13(9):1767-1775.
[18]SHI Chenghua,CAO Chengyong,LEI Mingfeng,et al.Effects of lateral unloading on the mechanical and deformation performance of shield tunnel segment joints[J].Tunnelling and Underground Space Technology,2016(51):175-188.
[19]GB 50010—2010,混凝土结构设计规范[S].GB 50010—2010,Code for design of concrete structures[S].
[20]GB/T3098.1—2000,螺栓、螺钉和螺柱的材料要求[S].GB/T3098.1—2000,Materials requirements of bolts,screws and stud[S].
[21]GB 50446—2008,盾构法隧道施工与验收规范[S].GB 50446—2008,Code for construction and acceptance of shield tunneling method[S].
[22]GB 50157—2003,地铁设计规范[S].GB 50157—2003,Code for the design of metro[S].