MEASURING DEVICE FOR FACE FORWARD BEDROCK DISPLACEMENT AND MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a measuring device for a face forward bedrock displacement and a measuring method capable of continuously and automatically measuring the face forward bedrock displacement. SOLUTION: The measuring device of the face forward bedrock displacement is constituted of a displacement rod 2 capable of being installed and fixed to the inside of a bore-hole 9, a displacement detecting section 3 for detecting the displacement of a bedrock transferred to a casing 6 capable of being installed and fixed to the inside of the bore-hole 9 through the displacement rod 2 and converting a displacement into an electric signal and a displacement recording meter 1 storing a record section 5 for recording the electric signal transmitted from the displacement detecting section 3 as displacement data. When the face forward bedrock displacement is measured, the bore-hole 9 used for measurement is bored from the face to a position sufficiently separated outside of a range influenced by excavating a face forward bedrock, and the displacement recording meter 1 is installed in the deepest section of the bore-hole 9 to fix to the bore-hole 9. The displacement rod 2 is installed on the face side from the displacement recording meter 1 to fix the rear end to the bore-hole 9. COPYRIGHT: (C)2005,JPO&NCIPI