客运专线大断面黄土隧道施工监控技术

Technology for Monitoring Construction of Large Section Loess Tunnel of Passenger Dedicated Line

研究目的:客运专线大断面黄土隧道,一般采用双侧壁、CRD、CD和留核心土台阶法施工。而对于特殊的黄土围岩、大断面及多种工法的施工环境,常规监测方法及现行规范的适用范围受到限制,需通过研究提出大断面黄土隧道施工监测的项目、监测手段和方法,提出相应的解决办法。研究结论:以郑西客运专线大断面黄土隧道施工监测为背景,通过现场试验及对10座大断面黄土隧道测试资料的统计分析,将常规方法与非接触方法进行对比,将规范极限值与实测资料进行对比后,针对多种工法施工环境提出了客运专线大断面黄土隧道施工监测项目、监测手段和方法,以及控制基准值。

Research purposes： Large section loess tunnels of passenger dedicated lines are generally constructed with using many methods together, such as twin sidewall method, CRD method, CD method and the core bench method. For this kind of construction, the applicable ranges of the conventional construction monitoring method and the current code are limited, so it is necessary to do the study to propose the monitoring items, momtoring way, monitoring method and control reference value for monitoring the large section loess tunnel construction. Research conclusions：Taking monitoring construction of large section loess tunnels of Zhengzhou - Xi＇an Passenger Dedicated Line as the background, through the insitu test and the statistic analyses of the measured data of the 10 tunnels, the conventional method was compared with the non - contact measuring method. After comparing code limit values with the measured data, the monitoring items, monitoring way, monitoring method methods and the control reference values are offered for monitoring construction of large section loess tunnel of passenger dedicated line with using many construction methods together.