裂缝对衬砌结构承载力影响与评价方法研究
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摘要
为了研究裂缝对衬砌结构承载力的影响和弥补现行《公路隧道养护技术规范(JTG H12—2015)》没有提供基于力学分析的结构承载能力评价方法,利用Abaqus扩展有限元软件,对纵向裂缝以不同深度单独出现在不同衬砌部位时的各工况进行了仿真模拟。通过承载力衰减率和安全系数衰减率,分别反映不同工况对衬砌结构承载力和安全性的影响程度。研究结果表明:随着裂缝深度的增加,衬砌结构的承载力和安全性会随之下降。裂缝出现在拱顶时对衬砌结构承载力和安全性的影响最大,其次为拱腰和边墙。根据建立的"衬砌安全性评价标准",提出了各工况的安全等级、安全类别以及相应的处治措施。
In order to derive the effect of cracks on the bearing capacity of the lining structure, and make up the lack of method for evaluating the bearing capacity of the structurel based on mechanical analysis in current "Technical Specifications for Highway Tunnel Maintenance(JTG H12-2015)",Abaqus extended finite element software to separately appear longitudinal cracks at different depths is used. Simulations were carried out under different working conditions for different lining parts. The defined bearing capacity attenuation rate and safety factor attenuation rate were used to reflect the influence of different working conditions on the bearing capacity and the safety of the lining structure.The results show that with the increase of crack depth, the bearing capacity and safety of the lining structure can decrease. When the crack appears in the vault, the bearing capacity and the safety of the lining structure can be the most important, factor followed by the arch waist and the side wall.According to the established "lining safety evaluation standard ware derived in this article", the safety level, safety category and corresponding treatment measures for each working condition are proposed.
In order to derive the effect of cracks on the bearing capacity of the lining structure, and make up the lack of method for evaluating the bearing capacity of the structurel based on mechanical analysis in current "Technical Specifications for Highway Tunnel Maintenance(JTG H12-2015)",Abaqus extended finite element software to separately appear longitudinal cracks at different depths is used. Simulations were carried out under different working conditions for different lining parts. The defined bearing capacity attenuation rate and safety factor attenuation rate were used to reflect the influence of different working conditions on the bearing capacity and the safety of the lining structure.The results show that with the increase of crack depth, the bearing capacity and safety of the lining structure can decrease. When the crack appears in the vault, the bearing capacity and the safety of the lining structure can be the most important, factor followed by the arch waist and the side wall.According to the established "lining safety evaluation standard ware derived in this article", the safety level, safety category and corresponding treatment measures for each working condition are proposed.
引文
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[13]秦洲,田正,刘燕鹏.六盘山隧道维修加固方案研究[J].筑路机械与施工机械化,2017,34(5):82-88.(QIN Zhou,TIAN Zheng,LIU Yan-peng.Research on maintenance and reinforcement scheme of Liupanshan Tunnel[J].Journal of Road Construction Machinery and Construction,2017,34(5):82-88.(in Chinese))
[14]唐浩杰,浦黔辉,文亚男,等.预应力高强混凝土箱梁极限承载力研究[J].交通科学与工程,2017,33(3):30-36.(TANG Hao-jie,PU Yu-hui,WEN Ya-nan,et al.Study on ultimate bearing capacity of prestressed high strength concrete box girder[J].Journal of Transport Science and Engineering,2017,33(3):30-36.(in Chinese))
[15]林志,陈思,陈相.隧道土建结构技术状况评定方法研究[J].隧道建设:中英文,2017,37(5):537-542.(LIN Zhi,CHEN Si,CHEN Xiang.Research on evaluation method of technical status of tunnel civil structure[J].Tunnel Construction:in Chinese and English,2017,37(5):537-542.(in Chinese))
[16]蔡唐涛.基于有限元对某复工隧道初衬的安全性分析[J].路基工程,2016(3):222-226.(CAI Tang-tao.Safety analysis of initial lining of a reconstruction tunnel based on finite element method[J].Subgrade Engineering,2016(3):222-226.(in Chinese))
[2]张伟,李夕兵,宫凤强,等.公路隧道衬砌裂缝成因分析及数值模拟研究[J].工程建设,2007,39(1):26-29.(ZHANGWei,LI Xi-bing,GONG Feng-qiang,et al.Cause analysis and numerical simulation of cracks in highway tunnel linings[J].Engineering Construction,2007,39(1):26-29.(in Chinese))
[3]刘海京,郑佳艳,林志.衬砌存在裂缝的隧道力学模型及机理研究[J].公路隧道,2011(1):1-4.(LIU Hai-Jing,ZHENG Jia-Yan,LIN Zhi.Mechanical model and mechanism of tunnels with cracks in lining[J].Highway Tunnel,2011(1):1-4.(in Chinese))
[4]Yu L,Chen L,Bao L,et al.Both the highway tunnel secondary lining grack damage causes and the renovation[A].Proceedings of the Fifth Internation Conference on Transporation Engineering[C].Dalian,China:[s.n.],2015:1137-1145.
[5]王华夏.高速铁路隧道衬砌裂缝图像快速采集系统研究[D].成都:西南交通大学,2013.(WANG Hua-xia.Study on rapid acquisition system of crack image of high-speed railway tunnel lining[D].Chengdu:Southwest Jiaotong University,2013.(in Chinese))
[6]王华牢,刘学增,李宁,等.纵向裂缝隧道衬砌结构的安全评价与加固研究[J].岩石力学与工程学报,2010,29(增1):2651-2656.(WANG Hua-lao,LIU Xue-zeng,LI Ning,et al.Safety evaluation of tunnel lining longitudinal cracks and reinforcement design[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(Supp.1):2651-2656.(in Chinese))
[7]Mashimo H,Isago N,Yoshinaga S,et al.Experimental investigation on load-carrying capacity of concrete tunnel lining[A].Proceedings of the Twenty Eighth ITA General Assembly and World Tunnel Congress[C].Sydney,Australian:Australian Tunnelling Society,2002:1-10.
[8]秦煜,吴华,易志坚,等.基于断裂力学能量理论的柔性纤维混凝土阻裂机理全过程分析[J].公路工程,2018,43(4):127-132.(QIN Wei,WU Hua,YI Zhi-jian,et al.Analysis of the whole process of flexible fiber concrete cracking mechanism based on energy theory of fracture mechanics[J].Highway Engineering,2018,43(4):127-132.(in Chinese))
[9]郑阳焱.公路隧道衬砌裂损机理及结构安全性评价研究[D].长沙:中南大学,2014.(ZHENG Yang-yan.Research on the mechanism and structural safety evaluation of highway tunnel lining[D].Changsha:Central South University,2014.(in Chinese))
[10]张义红.基于有限元法的病害隧道结构安全性评价[D].兰州:兰州交通大学,2013.(ZHANG Yi-hong.Safety evaluation of diseased tunnel structure based on finite element method[D].Lanzhou:Lanzhou Jiaotong University,2013.(in Chinese))
[11]夏文.浅埋暗挖地铁隧道二次衬砌受力特性研究[D].青岛:青岛理工大学,2016.(XIA Wen.Study on the mechanical characteristics of secondary lining of shallow buried tunnel[D].Qingdao:Qingdao Technological University,2016.(in Chinese))
[12]孙玉军,郭长宝,吴中海,等.数值模拟探讨青藏高原东部应力应变场及断裂活动性[J].地球学报,2017,38(3):385-392.(SUN Yu-jun,GUO Chang-bao,WU Zhong-hai,et al.Numerical simulation of stress-strain field and fault activity in the eastern Tibetan Plateau[J].Chinese Journal of Earth,2017,38(3):385-392.(in Chinese))
[13]秦洲,田正,刘燕鹏.六盘山隧道维修加固方案研究[J].筑路机械与施工机械化,2017,34(5):82-88.(QIN Zhou,TIAN Zheng,LIU Yan-peng.Research on maintenance and reinforcement scheme of Liupanshan Tunnel[J].Journal of Road Construction Machinery and Construction,2017,34(5):82-88.(in Chinese))
[14]唐浩杰,浦黔辉,文亚男,等.预应力高强混凝土箱梁极限承载力研究[J].交通科学与工程,2017,33(3):30-36.(TANG Hao-jie,PU Yu-hui,WEN Ya-nan,et al.Study on ultimate bearing capacity of prestressed high strength concrete box girder[J].Journal of Transport Science and Engineering,2017,33(3):30-36.(in Chinese))
[15]林志,陈思,陈相.隧道土建结构技术状况评定方法研究[J].隧道建设:中英文,2017,37(5):537-542.(LIN Zhi,CHEN Si,CHEN Xiang.Research on evaluation method of technical status of tunnel civil structure[J].Tunnel Construction:in Chinese and English,2017,37(5):537-542.(in Chinese))
[16]蔡唐涛.基于有限元对某复工隧道初衬的安全性分析[J].路基工程,2016(3):222-226.(CAI Tang-tao.Safety analysis of initial lining of a reconstruction tunnel based on finite element method[J].Subgrade Engineering,2016(3):222-226.(in Chinese))