浅覆土曲线顶管轴线控制关键技术研究

随着城市发展不断深化，顶管施工技术在城市市政管道及通道工程中的作用日益凸显，面对越来越复杂的城市施工环境及社会环境压力，在直线顶管技术的基础上，曲线顶管施工技术解决了直线顶管无法解决的问题，发挥了巨大的经济及社会效应，曲线顶管施工技术也得到了更大发展。所依托的工程背景具有其特殊性，需要克服曲线顶管及浅覆土两个不利因素，从机械设备改进、轴线放样、过程测量、纠偏控制等方面严格把控，同时确保曲线内被保护构造物的安全。主要从轴线放样、轨迹控制等方面进行施工技术阐述，着重点在于现场施工，为后续不同环境下的曲线顶管施工提供一定的参考。

Study on Key Technologies of Axis Control of Curve Pipe Jacking in Shallow Overburden Soil

With the continuous deepening of urban development, the role of the pipe-jacking construction technique is more remarkable in the urban municipal pipeline and channel projects. Facing the more and more complex construction environment and social environment pressure, on the basis of the straight pipe jacking technique, the curve pipe-jacking construction technique solves the problem that the straight pipe jacking is hard to solve, plays the huge economic and social effects, and is also greatly developed. Based on its particularities of the project, two adverse factors of curve pipe jacking and shallow overburden soil should be overcome. Due to the great construction difficulties, it is required to strictly control the mechanical equipment modification, axis lofting, process measurement and deviation rectification, in addition required to ensure the protected structures within the curve. The construction technologies are expounded mainly from the aspects of axis lofting and traction control. The emphasis is on the site construction, which provides the reference for the construction of curve pipe jacking in the different environments.