Title:
HOLLOW CROSS SECTION MEASURING DEVICE
Document Type and Number:
Japanese Patent JP3519587
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a hollow cross section measuring device which can calculate the deformation amount of a tunnel cross section in real time and in a short time.
SOLUTION: This hollow cross section measuring device is provided with an optical fiber distortion sensor 1, one optical fiber 2 provided in a tunnel, and rods for fixing rock bed 3 (3A to 3E). The optical fiber 2 consists of a part connected with the optical fiber distortion sensor 1, a part affixed to the tunnel wall in the peripheral direction, and a part to be inserted inside the rod for fixing rock bed 3. The rod for fixing rock bed 3 is provided in the vertical direction of the tunnel wall, one end 6 of the rod for fixing rock bed is fixed on a tunnel wall surface 4, and the other end 7 thereof is fixed on a rock bed 8. A flat plate or a round bar 9 and the optical fiber are attached inside the rod for fixing rock bed 3 so as to follow the deformation of the rod for fixing rock bed 3, and a deformation amount of the tunnel wall in the peripheral direction and vertical direction is measured by one optical fiber to monitor a deformation amount of the tunnel at all times.
Inventors:
Sugimura, Tadashi
Inoue, Yoshiaki
Kai, Tokio
Yamaura, Tsuyotoshi
Tsukano, Masazumi
Inoue, Yoshiaki
Kai, Tokio
Yamaura, Tsuyotoshi
Tsukano, Masazumi
Application Number:
JP30048397A
Publication Date:
April 19, 2004
Filing Date:
October 31, 1997
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
G01B11/16; G01C7/06; (IPC1-7): G01B11/16; G01C7/06
Attorney, Agent or Firm:
鈴江 武彦 （外３名）