特长隧道整体贯通前先期铺设无砟轨道施工测量方法探讨

铁路特长隧道一般采用"长隧短打"施工方法,隧道洞内按铺设无砟轨道设计,现阶段在隧道整体贯通后才开始铺设无砟轨道,导致隧道施工工期无法保证。针对特长隧道"长隧短打"施工方法,探讨在特长隧道整体贯通前,在隧道已贯通段落,具备条件地段先期铺设无砟轨道所涉及到的测量技术问题,从理论上建设性地提出一个整体实施解决方案,并提出相应的保证测量精度的方法和措施。研究表明,特长隧道整体贯通前先期铺设无砟轨道施工测量从理论上是可行的。研究成果对加快特长隧道施工进度,保障隧道建设工期具有重要的参考借鉴意义。

Discussion on Survey Methods for Ballastless Track Construction in Sections of Tunnels That Have Not Been Completely Broken through

Long railway tunnels are normally constructed by means of driving from different construction adits and ballastless track is often designed for the long railway tunnels. At present, the ballastless track is normally laid after the tunnel has been completely broken through, therefore the tight construction schedule of the tunnel cannot be guaranteed. In the paper, the survey methods for the ballastless track construction in sections of tunnels that have not been completely broken through are discussed, an integral solution for the construction survey is provided, and survey methods and countermeasures to guarantee the survey accuracy are proposed. The study shows that the survey for the construction of the ballastless track in sections of tunnels that have not been completely broken through is theoretically feasible. The study result has great significance in improving the construction progress of super long railway tunnels and ensuring the construction schedule of the tunnels.