铁路隧道基底结构补强过程中的变形监测与控制
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摘要
由于受冻胀和地下水冲蚀作用铁路隧道中轨道板整体下沉,因此采用"锚注一体化"的方法填充轨道板底部裂隙,对基底进行补强。本文分别采用数字图像相关监测系统和激光位移监测系统对注胶过程中轨道板抬升进行实时监测。监测结果表明:基底结构补强过程中裂隙被胶水填充且撑大,使轨道板抬升,当抬升至1 mm的警戒值时停止注胶,轨道板缓慢下降,最后抬升位移趋于稳定; DIC监测系统和激光位移监测系统在轨道抬升监测与控制中具有良好的可靠性和稳定性,可应用于实际工程监测,为后续工程施工提供保障。
Due to frost heave and groundwater erosion,the whole track slab of railway tunnel subsides,so the method of "anchor-grouting integration" was adopted to fill the cracks at the bottom of the track slab and reinforce the substrate.In this paper,digital image correlation(DIC)monitoring system and laser displacement monitoring system were used to monitor the track slab lifting in the process of glue injection in real time.The monitoring results show that the cracks are filled and stretched by glue during the substrate structure reinforcement,which makes the track plate lift,the glue injection stops when the warning value of 1 mm is reached,the track plate slowly decreases and finally the lifting displacement tends to be stable.DIC monitoring system and laser displacement monitoring system have good reliability and stability in track lifting monitoring and control,which can be applied to practical engineering monitoring and provide guarantee for follow-up engineering construction.
Due to frost heave and groundwater erosion,the whole track slab of railway tunnel subsides,so the method of "anchor-grouting integration" was adopted to fill the cracks at the bottom of the track slab and reinforce the substrate.In this paper,digital image correlation(DIC)monitoring system and laser displacement monitoring system were used to monitor the track slab lifting in the process of glue injection in real time.The monitoring results show that the cracks are filled and stretched by glue during the substrate structure reinforcement,which makes the track plate lift,the glue injection stops when the warning value of 1 mm is reached,the track plate slowly decreases and finally the lifting displacement tends to be stable.DIC monitoring system and laser displacement monitoring system have good reliability and stability in track lifting monitoring and control,which can be applied to practical engineering monitoring and provide guarantee for follow-up engineering construction.
引文
[1]刘丙强.高速铁路基础变形测量技术体系探讨[J].铁道建筑,2015,55(7):92-94,124.
[2]郎向伟,张长生,强小俊,等.光栅位移计在高速铁路钢轨横向变形监测中的应用研究[J].铁道建筑,2015,55(10):144-146.
[3]孙伟,何小元.数字图像相关方法在土木测试领域中的实验研究[J].南京航空航天大学学报,2009,41(2):271-275.
[4]韩依颖,刘乃盛,蔡永昌.基于DIC方法的混凝土压缩试件裂纹识别[J].土木建筑与环境工程,2015,37(增2):51-55.
[5]戴宜全,孙泽阳,吴刚,等.基于数字图像相关法的混凝土全场变形测量[J].东南大学学报(自然科学版),2010,40(4):829-834.
[6]SHAO X X,DAI X J,CHEN Z N,et al.Real-time 3D Digital Image Correlation Method and Its Application in Human Pulse Monitoring[J].Applied Optics,2016,55(4):696-704.
[7]何长春.成都地铁某深基坑变形监测分析[J].山西建筑,2015,41(10):60-61.
[8]刘子武.应用激光位移计的基坑变形监测新技术[J].科技创新导报,2015(36):61,63.
[9]唐鹏,陈国庆,黄润秋,等.基于物理模拟试验的岩质滑坡地表位移分析[J].水文地质工程地质,2017,44(4):105-110.
[10]王彦军.基于红外激光位移传感器轨距在线测量的研究[J].铁道建筑,2008,48(11):102-103.
[11]陈士谦,张志峰,匡萃方.轨距传感器中激光光斑大小的影响[J].激光与红外,2006,36(5):396-398.
[12]黄志高,王元芳.基于光学原理的铁路钢轨直线度测量系统设计[J].装备制造技术,2017,45(4):46-48.
[13]陈双,邢宗义,王露,等.基于激光位移传感器的城轨车辆轮对尺寸在线检测技术[J].广西大学学报(自然科学版),2017,42(2):611-617.
[2]郎向伟,张长生,强小俊,等.光栅位移计在高速铁路钢轨横向变形监测中的应用研究[J].铁道建筑,2015,55(10):144-146.
[3]孙伟,何小元.数字图像相关方法在土木测试领域中的实验研究[J].南京航空航天大学学报,2009,41(2):271-275.
[4]韩依颖,刘乃盛,蔡永昌.基于DIC方法的混凝土压缩试件裂纹识别[J].土木建筑与环境工程,2015,37(增2):51-55.
[5]戴宜全,孙泽阳,吴刚,等.基于数字图像相关法的混凝土全场变形测量[J].东南大学学报(自然科学版),2010,40(4):829-834.
[6]SHAO X X,DAI X J,CHEN Z N,et al.Real-time 3D Digital Image Correlation Method and Its Application in Human Pulse Monitoring[J].Applied Optics,2016,55(4):696-704.
[7]何长春.成都地铁某深基坑变形监测分析[J].山西建筑,2015,41(10):60-61.
[8]刘子武.应用激光位移计的基坑变形监测新技术[J].科技创新导报,2015(36):61,63.
[9]唐鹏,陈国庆,黄润秋,等.基于物理模拟试验的岩质滑坡地表位移分析[J].水文地质工程地质,2017,44(4):105-110.
[10]王彦军.基于红外激光位移传感器轨距在线测量的研究[J].铁道建筑,2008,48(11):102-103.
[11]陈士谦,张志峰,匡萃方.轨距传感器中激光光斑大小的影响[J].激光与红外,2006,36(5):396-398.
[12]黄志高,王元芳.基于光学原理的铁路钢轨直线度测量系统设计[J].装备制造技术,2017,45(4):46-48.
[13]陈双,邢宗义,王露,等.基于激光位移传感器的城轨车辆轮对尺寸在线检测技术[J].广西大学学报(自然科学版),2017,42(2):611-617.