TUBULAR MEMBER BURYING METHOD AND PIT TRACK SYSTEM

PROBLEM TO BE SOLVED: To provide a technique for improving a shield method.SOLUTION: A pit track system used for the movement of a shield machine and material transportation in a pit for burying a tubular member is provided. The pit track system includes: a first track which is provided in a face section of a prescribed length from a head part in an excavation section and provided with a first material transportation track used for the material transportation and a subsequent carriage track used for the movement of the subsequent carriage of an excavator, and for which the first material transportation track and the subsequent carriage track are fixed side by side to a pit wall 95 through a first sleeper; a second track which is provided with a second material transportation track used for the material transportation and a second sleeper for fixing the second material transportation track to the pit wall 95, and is arranged at a position closer to the bottom part to the pit wall 95 than the first sleeper in the face section; and a connecting track device 30.