Automatic Guidance Technique of Pipe Replaced by Box Culvert Jacking Process in Underground 3D Traffic

In order to adapt new underground 3D traffic method of pipe replaced by box culvert jacking process,a set of automatic guidance system based on total station was developed.This paper introduced the principle and key techniques of this system,and combined with successful application of culvert jacking highway under the existing railway project in Shanghai Jinshan.In actual construction this system proved to be excellent and have the following features:automatic,reliable,accurate,and it could provide real-time deviation for correction to achieve information construction.