AUTOMATIC MEASUREMENT SYSTEM FOR TUNNEL CONVERGENCE

摘要

PROBLEM TO BE SOLVED: To provide an automatic measurement system for tunnel convergence capable of preventing the impossibility of measurement and keeping the measuring environment for a long period. SOLUTION: A three-dimensional automatic tracking optical wave range finder 3 having automatic collimating function is permanently set on the inner wall surface 2 of a tunnel 1, and a plurality of round slice sections A0-A4 are set at prescribed intervals L0-L4 on the tunnel inner wall surface 2 within the measuring visual field range L of the automatic collimating function by use of the three-dimensional automatic tracking optical wave range finder 3 as an automatic tracking total station. A plurality of target devices 10 is permanently set on each round slice section A0-A4, the station P of each target device 10 is successively automatically tracked by remote control and collimated, and the displacement quantity of the station P of each target device 10 is automatically measured. A collimating surface 12 consisting of the prism or reflecting sheet 12a of the target device 10 to be measured is opened and closed in such a manner as to be screenable by a shutter mechanism 13 in every measurement order.