CPⅢ轨道控制网分段测设技术在长大隧道无砟道床施工中的应用

摘要

With the comprehensive construction of the high-speed Railway in the mountains of Western China,ballastless track construction progress within the tunnels have become the focus of construction period.The orbit control network as one of the key technologies of construction control net schedule is essential to ensure the quality of tunnel construction of ballast-less track and overall construction objective.Combined with the innovations made in Nanning-Qinzhou railway tunnel con-struction,the paper sums up the key technical and operational points in tunnel track sectional surveying control network to provide reference to similar projects.%随着高速铁路在我国西部山区的全面开工建设，长大隧道内无砟轨道施工进度已成为制约建设工期的重点。如何确保长大隧道无砟轨道施工质量和建设工期总体目标，其中施工关键技术之一的CPⅢ控制网能否按期完成至关重要。结合南宁至钦州高速铁路花甲山隧道工程施工中取得的创新成果，总结了长大隧道内轨道控制网分段测设关键技术和操作要点，给类似工程提供借鉴。