| 摘要 |
PROBLEM TO BE SOLVED: To provide method and system for survey in curve advance jacking method employing hume pipes having a diameter small enough to block intrusion of a person. SOLUTION: Mobile trucks 1-4 mounting survey units 11, 21, 31, 41 are arranged between a duct port B1 (a pithead) and a drill machine A and the position of a rearmost mobile truck 1 is measured sequentially by means of the survey units 11, 21, 31, 41 mounted on respective mobile trucks 1-4 while the position of an excavation machine A is measured by means of the survey unit 11 mounted on the rearmost mobile truck 1. The survey unit comprises a mobile truck mounting survey units, e.g. a coordinate measuring unit, a light wave range finder, a prism (target), a camera, and the like, and means for processing measurement data, and the like. |
