波纹钢板加固盾构隧道衬砌管片抗弯性能试验研究
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摘要
为提高既有隧道结构承载力及刚度,对盾构隧道衬砌管片进行波纹钢板加固,并采用足尺试验方法,对2块加固管片与1块未加固管片进行2点抗弯加载,分析加固管片的受力过程、破坏模式以及加固机制,并对其加固效果进行总体评价。试验结果表明:1)波纹钢板加固是一种有效的加固方法,可以有效提高管片极限抗弯承载力及刚度; 2)加固后管片破坏模式为斜截面受剪破坏; 3)加固钢板与管片界面间存在较大剪切应力与径向剥离应力,应设置有效的抗剪及抗剥离构造措施。
In order to improve the bearing capacity and stiffness of shield tunnel lining segment,corrugated steel is used to strengthen the shield lining segment.In this paper,full-scale tests are conducted on two segments strengthened by corrugated steel and one segment without strengthening to study the loading progress,failure mode and strengthening mechanism and evaluate the strengthening effect.The test results show that:(1) The corrugated steel is an effective strengthening material which can effectively improve the ultimate bending capacity and stiffness.(2) The failure mode of the strengthened segment is shear failure.(3) Shear stress and radial peeling stress exist on the interface between corrugated steel and segment concrete,and it is necessary to carry out effective countermeasures.
In order to improve the bearing capacity and stiffness of shield tunnel lining segment,corrugated steel is used to strengthen the shield lining segment.In this paper,full-scale tests are conducted on two segments strengthened by corrugated steel and one segment without strengthening to study the loading progress,failure mode and strengthening mechanism and evaluate the strengthening effect.The test results show that:(1) The corrugated steel is an effective strengthening material which can effectively improve the ultimate bending capacity and stiffness.(2) The failure mode of the strengthened segment is shear failure.(3) Shear stress and radial peeling stress exist on the interface between corrugated steel and segment concrete,and it is necessary to carry out effective countermeasures.
引文
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[13]冯忠居,乌延玲,贾彦武,等.钢波纹管涵洞受力与变形特性模拟试验研究[J].岩土工程学报,2013,35(1):187.FENG Zhongju,WU Yanling,JIA Yanwu,et al.Model tests on force and deformation characteristics of corrugated steel pipe culvert[J].Chinese Journal of Geotechnical Engineering,2013,35(1):187.
[14]刘保东,李雨株,王全录,等.大跨覆土波纹钢板拱桥结构加强措施研究[J].北京交通大学学报(自然科学版),2013,37(4):24.LIU Baodong,LI Yuzhu,WANG Quanlu,et al.Strengthening scheme of the long-span buried corrugated steel arch bridge structure[J].Journal of Beijing Jiaotong University(Natural Science),2013,37(4):24.
[2]竺维彬,鞠世健.盾构隧道管片开裂的原因及相应对策[J].现代隧道技术,2003(1):21.ZHU Weibin,JU Shijian.Causes and countermeasures for segment cracking in shield-driven tunnel[J].Modern Tunnelling Technology,2003(1):21.
[3]柳献,张晨光,张宸,等.FRP加固盾构隧道纵缝接头试验研究[J].铁道科学与工程学报,2016,13(2):316.LIU Xian,ZHANG Chenguang,ZHANG Chen,et al.Experimental study of the longitudinal joint in shield tunnel reinforced with FRP material[J].Journal of Railway Science and Engineering,2016,13(2):316.
[4]李宇杰,王梦恕,徐会杰,等.纤维布补强地铁隧道结构的数值分析[J].土木工程学报,2014,47(8):138.LI Yujie,WANG Mengshu,XU Huijie,et al.Numerical analysis of metro tunnel structure reinforced by fiber cloth material[J].China Civil Engineering Journal,2014,47(8):138.
[5]刘梓圣,张冬梅.软土盾构隧道芳纶布加固机理和效果研究[J].现代隧道技术,2014,51(5):155.LIU Zisheng,ZHANG Dongmei.The mechanism and effects of AFRP reinforcement for a shield tunnel in soft soil[J].Modern Tunnelling Technology,2014,51(5):155.
[6]毕湘利,柳献,王秀志.内张钢圈加固盾构隧道结构极限承载力的足尺试验研究[J].土木工程学报,2014,47(11):128.BI Xiangli,LIU Xian,WANG Xiuzhi.Experimental study of ultimate load-bearing capacity of deformed segmental tunnel linings strengthened by steel plates[J].China Civil Engineering Journal,2014,47(11):128.
[7]柳献,张浩立,唐敏,等.内张钢圈加固盾构隧道结构承载能力的试验研究:半环加固法[J].现代隧道技术,2014,51(3):131.LIU Xian,ZHANG Haoli,TANG Min,et al.Experimental study of the ultimate bearing capacity of a shield tunnel reinforced by a semi-ring steel plate[J].Modern Tunnelling Technology,2014,51(3):131.
[8]柳献,唐敏,鲁亮,等.内张钢圈加固盾构隧道结构承载能力的试验研究:整环加固法[J].岩石力学与工程学报,2013,32(11):2300.LIU Xian,TANG Min,LU Liang,et al.Experimental study of ultimate bearing capacity of shield tunnel reinforced by full-ring steel plate[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(11):2300.
[9]柳献,张乐乐,李刚,等.复合腔体加固盾构隧道结构承载能力的试验研究[J].城市轨道交通研究,2015(7):52.LIU Xian,ZHANG Lele,LI Gang,et al.Experimental study of the ultimate bearing capacity of shield tunnel composite cavity reinforcement[J].Urban Mass Transit,2015(7):52.
[10]柳献,张晨光,张衍,等.复合腔体加固盾构隧道纵缝接头试验研究[J].铁道科学与工程学报,2015,12(2):376.LIU Xian,ZHANG Chenguang,ZHANG Yan,et al.Experimental study of the longitudinal joint of shield tunnels reinforced with composite cavity[J].Journal of Railway Science and Engineering,2015,12(2):376.
[11]柳献,张乐乐,李刚,等.复合腔体加固盾构隧道衬砌力学行为的宏观分析模型[J].现代隧道技术,2014,51(5):78.LIU Xian,ZHANG Lele,LI Gang,et al.A macroscopic analysis model for the mechanical behaviors of a shield tunnel segment lining reinforced with a composite cavity[J].Modern Tunnelling Technology,2014,51(5):78.
[12]朱妍.复合腔体构件加固盾构法隧道的关键技术研究[J].隧道与轨道交通,2017(3):14.ZHU Yan.Key technology of shield tunnel reinforcement by use of composite structure[J].Tunnels and Rail Transit,2017(3):14.
[13]冯忠居,乌延玲,贾彦武,等.钢波纹管涵洞受力与变形特性模拟试验研究[J].岩土工程学报,2013,35(1):187.FENG Zhongju,WU Yanling,JIA Yanwu,et al.Model tests on force and deformation characteristics of corrugated steel pipe culvert[J].Chinese Journal of Geotechnical Engineering,2013,35(1):187.
[14]刘保东,李雨株,王全录,等.大跨覆土波纹钢板拱桥结构加强措施研究[J].北京交通大学学报(自然科学版),2013,37(4):24.LIU Baodong,LI Yuzhu,WANG Quanlu,et al.Strengthening scheme of the long-span buried corrugated steel arch bridge structure[J].Journal of Beijing Jiaotong University(Natural Science),2013,37(4):24.