The phase synchronization system designed uses two-way phase transfer which measures the phase differences both at the receiver and the transmitter,and then gets the compensation phase through the subtraction operation between the two phase differences.

Some methods and measures are studied,such as the rational readjustment of all kinds of error,the surveying plan,the precise azimuth transfer of shaft,and the auto guiding system with traverse control improving the orientation precision of gyro theodolite,in order to take into consideration the feature of dynamic driving in of the underground pipe driving project.