Publications / 1988 Proceedings of the 5th ISARC, Tokyo, Japan

Automated Surveying System for Shield Tunneling

Ken-ichi Nishide, Kyosuke Mishima
Pages 821-828 (1988 Proceedings of the 5th ISARC, Tokyo, Japan, ISSN 2413-5844)

During shield driving, to survey and control the position of a shield machine is an essential part of the quality control to keep the tunnel alignment within the tolerance. In curved alignment, conventional surveying with a transit and a level is quite time-consuming and often results in steering of a shield machine too late to stay on the design alignment. To overcome this problem, an automatic surveying system has been developed, which works effectively even in a curve. This system consists of a laser measurement unit, a signal processing unit, an I/O unit, a data transmitting unit and four corner-cubes, and calculates the position and the heading of the shield machine by measuring the angles and the distances of each two corner-cubes set on fixed reference points and the shield machine. This paper describes the surveying method, the mechanism and functions of the surveying system, and discusses the surveying accuracy and results of some tests conducted on its performance.

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