地铁盾构长大隧道测量施工技术研究

Construction Technology Research on Survey of Long Distance and Large Radius Shield Tunnel

结合广州市轨道交通22号线工程,针对2 km以上长距离隧道工程施工需要高精度控制测量技术配合的重难点,对控制测量技术进行分析和论证,创新提出打孔定向测量施工控制技术、陀螺仪定向测量施工技术、地表深层监测施工技术,并对其施工流程进行详细分析探讨。工程实践证明,通过三项地铁盾构隧道测量施工技术的应用,不但提高了施工功效,而且提高了隧道测量精度,减小了贯通误差,确保了盾构隧道得以安全顺利贯通。

Combined with the rail transit project of Guangzhou Metro Line 22,aiming at the difficulties of high precision control survey technology used in the construction of long-distance tunnel more than 2 km,this paper analyzes and demonstrates the control survey technology,and puts forward the drilling directional measurement technology,gyroscope directional measurement construction technology and surface deep monitoring construction technology,and discusses the construction process in detail.Engineering practice has proved that the application of three subway shield tunnel surveying construction technologies not only improves the construction efficiency,but also ensures the tunnel surveying accuracy,reduces the penetration error,and ensures the safe and smooth penetration of the shield tunnel.