POSITION MEASURING DEVICE OF IMMERSED TUBE

摘要

PROBLEM TO BE SOLVED: To provide a position measuring device of an immersed tube caisson capable of eliminating installation error of a pedestal for mounting a sensor and improving immersed precision of the immersed tube. SOLUTION: A storage case 4 is provided in the axial direction of the immersed tube by passing through a bulkhead 3 of the immersed tube 1. A watertight coupler 5 is attached to the storage case to slidably support a sensor support shaft 6 on the watertight coupler. The sensor 2 is attached to a tip of the sensor support shaft and is pushed out in the direction of the opposing immersed tube from the inside of the tube to protrude to the outside of the tube by the sensor support shaft.