CRTS Ⅰ型板式轨道快速注浆抬升方案研究
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摘要
针对CRTSⅠ型板式轨道超出扣件系统调整范围的基础沉降,提出快速、有效的轨道板注浆抬升修复方案。采用有限元法分析轨道板顶升过程中轨道结构受力特性,研究不同抬升位置和抬升高度对结构安全的影响,并提出合理的抬升方案。研究结果表明:轨道板抬升过程中,底座板受力较小,伸缩缝对其受力无明显影响;钢轨对轨道板受力影响较大,在不拆除扣件系统的条件下直接在轨道板板中单点抬升轨道板,其上表面有开裂的风险。因此,在抬板注浆过程中,为减小轨道板受力,注浆前宜拆除扣件系统;若保留扣件系统,宜采用相邻双板端部同步抬升轨道板或单板1号和4号抬升孔同步抬升轨道板的施工方案。
Aiming at the settlement of CRTS I slab track beyond the adjustment range of fastener system, rapid and effective lifting plans of grouting for the track slab were proposed. Stress characteristic of track structure during the lifting process was analyzed using finite element method. Effects of different lifting positions and heights on structural safety were studied, and sensible lifting plans were proposed. Results show that during the lifting process of the track slab, base layer has less stress, and the influence of the expansion joint is not significant. Rail has great impact on the stress of the track slab. If the track slab is directly lift up at a single point at the middle of the track without removing the fastener system, the upper surface is under the risk of cracking. Therefore, in order to reduce the stress of the track slab, the fastener system should be removed during the lifting process of grouting. If fastener system is remained, construction plans of lifting two adjacent slabs at the ends synchronously or lifting single slab at both Point 1 and Point 4 synchronously should be adopted.
Aiming at the settlement of CRTS I slab track beyond the adjustment range of fastener system, rapid and effective lifting plans of grouting for the track slab were proposed. Stress characteristic of track structure during the lifting process was analyzed using finite element method. Effects of different lifting positions and heights on structural safety were studied, and sensible lifting plans were proposed. Results show that during the lifting process of the track slab, base layer has less stress, and the influence of the expansion joint is not significant. Rail has great impact on the stress of the track slab. If the track slab is directly lift up at a single point at the middle of the track without removing the fastener system, the upper surface is under the risk of cracking. Therefore, in order to reduce the stress of the track slab, the fastener system should be removed during the lifting process of grouting. If fastener system is remained, construction plans of lifting two adjacent slabs at the ends synchronously or lifting single slab at both Point 1 and Point 4 synchronously should be adopted.
引文
[1]王涛,李洪刚,贾恒琼,等.冬季低温对CRTSI型CA砂浆质量影响研究[J].铁道科学与工程学报,2016,13(11):2148-2153.WANG Tao,LI Honggang,JIA Hengqiong,et al.Influences of low temperature on ca mortar in winter[J].Journal of Railway Science and Engineering,2016,13(11):2148-2153.
[2]邵丕彦,李海燕,吴韶亮,等.CRTS I型轨道板温度变形及与砂浆垫层间离缝的测试研究[J].中国铁道科学,2013,34(2):18-22.SHAO Piyan,LI Haiyan,WU Shaoliang,et al.Measurement and research on temperature warping of CRTS I track slab and crack between track slab and cement asphalt mortar cushion[J].China Railway Science,2013,34(2):18-22.
[3]郭利康,张四放,杨荣山,等.CRTS I型板式无砟轨道脱空状态对结构模态的影响[J].铁道标准设计,2015(9):29-32.GUO Likang,ZHANG Sifang,YANG Rongshan,et al.The influence of CRTS I slab track disengaging on structural modal[J].Railway Standard Design,2015(9):29-32.
[4]徐庆元,李斌,范浩.路基不均匀沉降对列车-路基上无砟轨道耦合系统动力特性的影响[J].铁道科学与工程学报,2012,9(3):13-19.XU Qingyuan,LI Bin,FAN Hao.Influence of uneven settlement of subgrade on dynamic characteristic of train-ballastless track on subgrade coupling system[J].Journal of Railway Science and Engineering,2012,9(3):13-19.
[5]张珍珍.CRTS I型板式无砟轨道路基沉降抬板维修技术研究[J].铁道标准设计,2015(4):13-15.ZHANG Zhenzhen.Study on slab uplifting treatment of subgrade settlement of CRTS I ballastless slab track[J].Railway Standard Design,2015(4):13-15.
[6]杨明辉.城市轨道交通整体道床沉降修复技术[J].铁道标准设计,2016(2):23-28.YANG Minghui.Renovation techniques for monolithic concrete track settlement of urban rail transit[J].Railway Standard Design,2016(2):23-28.
[7]王胜.高速铁路无砟轨道静态精调技术分析及应用[J].上海铁道科技,2014(4):83-84.WANG Sheng.Analysis and application of static accurate adjustment technique for ballastless track of high speed railway[J].Shanghai Railway Science&Technology,2014(4):83-84.
[8]中国铁道科学研究院金属及化学研究所.I型板式无砟轨道沉降抬升注浆维修技术研究[R].北京:中国铁道科学研究院金属及化学研究所,2013.Metals&Chemistry Research Institute of CARS.Research on lifting maintenance of grouting technology for settlement of CRTS track slab[R].Beijing:Metals&Chemistry Research Institute of CARS,2013.
[9]张家海.CRTS I型板式无砟轨道抬升修复技术研究[J].上海铁道科技,2013(4):71-73.ZHANG Jiahai.Repairing technology of lifting of CRTSI slab track[J].Shanghai Railway Science&Technology,2013(4):71-73.
[10]王涛,李海燕,邵丕彦,等.快速修复CRTS I型板式轨道沉降的抬板叠灌法[J].中国铁道科学,2016,37(4):28-33.WANG Tao,LI Haiyan,SHAO Piyan,et al.Plate-lift filling double-layer mortar technology for rapidly restoring subgrade settlement of CRTS I slab track[J].China Railway Science,2016,37(4):28-33.
[11]李立新,童无欺,邹金锋.注浆抬升位移的随机介质理论预测方法[J].铁道科学与工程学报,2013,10(5):47-51.LI Lixin,TONG Wuqi,ZOU Jinfeng.Study on grouting uplift displacement prediction using stochastic medium theory[J].Journal of Railway Science and Engineering,2013,10(5):47-51.
[12]聂志红,刘源,罗承平,等.基床表层级配碎石注浆改良模型试验[J].长安大学学报(自然科学版),2015,35(4):48-53.NIE Zhihong,LIU Yuan,LUO Chengping,et al.Model test on grouting improvement of graded gravel in surface layer of subgrade[J].Journal of Chang’an University(Natural Science Edition),2015,35(4):48-53.
[13]姚建平.运营高速铁路路基基底注浆加固关键控制技术[J].铁道建筑,2017,57(9):104-106.YAO Jianping.Key control techniques on grouting to strengthen subgrade and basement of operating high speed railway[J].Railway Engineering,2017,57(9):104-106.
[14]赵磊,高亮,蔡小培,等.CRTS I型无砟轨道板预应力筋破坏所致附加荷载的影响分析[J].铁道学报,2015,37(12):74-80.ZHAO Lei,GAO Liang,CAI Xiaopei,et al.Analysis of influence of additional load caused by prestressed reinforcement destruction of CRTS I track slab[J].Journal of the China Railway Society,2015,37(12):74-80.
[15]GB 50010-2010,混凝土结构设计规范[S].GB 50010-2010,Code for design of concrete structures[S].
[2]邵丕彦,李海燕,吴韶亮,等.CRTS I型轨道板温度变形及与砂浆垫层间离缝的测试研究[J].中国铁道科学,2013,34(2):18-22.SHAO Piyan,LI Haiyan,WU Shaoliang,et al.Measurement and research on temperature warping of CRTS I track slab and crack between track slab and cement asphalt mortar cushion[J].China Railway Science,2013,34(2):18-22.
[3]郭利康,张四放,杨荣山,等.CRTS I型板式无砟轨道脱空状态对结构模态的影响[J].铁道标准设计,2015(9):29-32.GUO Likang,ZHANG Sifang,YANG Rongshan,et al.The influence of CRTS I slab track disengaging on structural modal[J].Railway Standard Design,2015(9):29-32.
[4]徐庆元,李斌,范浩.路基不均匀沉降对列车-路基上无砟轨道耦合系统动力特性的影响[J].铁道科学与工程学报,2012,9(3):13-19.XU Qingyuan,LI Bin,FAN Hao.Influence of uneven settlement of subgrade on dynamic characteristic of train-ballastless track on subgrade coupling system[J].Journal of Railway Science and Engineering,2012,9(3):13-19.
[5]张珍珍.CRTS I型板式无砟轨道路基沉降抬板维修技术研究[J].铁道标准设计,2015(4):13-15.ZHANG Zhenzhen.Study on slab uplifting treatment of subgrade settlement of CRTS I ballastless slab track[J].Railway Standard Design,2015(4):13-15.
[6]杨明辉.城市轨道交通整体道床沉降修复技术[J].铁道标准设计,2016(2):23-28.YANG Minghui.Renovation techniques for monolithic concrete track settlement of urban rail transit[J].Railway Standard Design,2016(2):23-28.
[7]王胜.高速铁路无砟轨道静态精调技术分析及应用[J].上海铁道科技,2014(4):83-84.WANG Sheng.Analysis and application of static accurate adjustment technique for ballastless track of high speed railway[J].Shanghai Railway Science&Technology,2014(4):83-84.
[8]中国铁道科学研究院金属及化学研究所.I型板式无砟轨道沉降抬升注浆维修技术研究[R].北京:中国铁道科学研究院金属及化学研究所,2013.Metals&Chemistry Research Institute of CARS.Research on lifting maintenance of grouting technology for settlement of CRTS track slab[R].Beijing:Metals&Chemistry Research Institute of CARS,2013.
[9]张家海.CRTS I型板式无砟轨道抬升修复技术研究[J].上海铁道科技,2013(4):71-73.ZHANG Jiahai.Repairing technology of lifting of CRTSI slab track[J].Shanghai Railway Science&Technology,2013(4):71-73.
[10]王涛,李海燕,邵丕彦,等.快速修复CRTS I型板式轨道沉降的抬板叠灌法[J].中国铁道科学,2016,37(4):28-33.WANG Tao,LI Haiyan,SHAO Piyan,et al.Plate-lift filling double-layer mortar technology for rapidly restoring subgrade settlement of CRTS I slab track[J].China Railway Science,2016,37(4):28-33.
[11]李立新,童无欺,邹金锋.注浆抬升位移的随机介质理论预测方法[J].铁道科学与工程学报,2013,10(5):47-51.LI Lixin,TONG Wuqi,ZOU Jinfeng.Study on grouting uplift displacement prediction using stochastic medium theory[J].Journal of Railway Science and Engineering,2013,10(5):47-51.
[12]聂志红,刘源,罗承平,等.基床表层级配碎石注浆改良模型试验[J].长安大学学报(自然科学版),2015,35(4):48-53.NIE Zhihong,LIU Yuan,LUO Chengping,et al.Model test on grouting improvement of graded gravel in surface layer of subgrade[J].Journal of Chang’an University(Natural Science Edition),2015,35(4):48-53.
[13]姚建平.运营高速铁路路基基底注浆加固关键控制技术[J].铁道建筑,2017,57(9):104-106.YAO Jianping.Key control techniques on grouting to strengthen subgrade and basement of operating high speed railway[J].Railway Engineering,2017,57(9):104-106.
[14]赵磊,高亮,蔡小培,等.CRTS I型无砟轨道板预应力筋破坏所致附加荷载的影响分析[J].铁道学报,2015,37(12):74-80.ZHAO Lei,GAO Liang,CAI Xiaopei,et al.Analysis of influence of additional load caused by prestressed reinforcement destruction of CRTS I track slab[J].Journal of the China Railway Society,2015,37(12):74-80.
[15]GB 50010-2010,混凝土结构设计规范[S].GB 50010-2010,Code for design of concrete structures[S].