| 摘要 |
PROBLEM TO BE SOLVED: To provide an arrival position confirming method of an underground excavator capable of accurately confirming an arrival position of the underground excavator, in a shielding method and a pipe jacking method. SOLUTION: A detecting sheet 5 is installed in a side surface part of a preceding tunnel 1 for detecting an arrival of a shield machine 3 of a succeeding tunnel 2 bored from the rear of the preceding tunnel 1. The detecting sheet 5 is formed of two sheet materials 5a and 5b and a plurality of vertical sensor cords 5c and horizontal sensor cords 5d. The shield machine 3 comes into contact with the detecting sheet 5, and the vertical sensor cords 5c or the horizontal sensor cords 5d are disconnected, to thereby confirm that the shield machine 3 arrives at a side part of the preceding tunnel 1. COPYRIGHT: (C)2006,JPO&NCIPI |
