Abstract:

Taking the construction control survey for ShiPan shieldbored tunnel on line 3 of Guangzhou Metro as example, the author presents the tunnel survey technology and summarizes the experience in tunnel control survey so as to reduce the survey deviations and gross errors so that convenient and feasible control survey plans can be provided for future tunnel works.

Key words: long Metro tunnel control survey  connection survey, holingthrough accuracy  observation error  method of three tripods  pegtop azimuth