Strategic Study of CAE >> 2010, Volume 12, Issue 12
Control measuring technique of long distance only head driving in shield tunnel
1. Beijing Underground Diameter Project Department, China Railway Tunnel Group, Beijing 100045, China;
2. Central Station of Security and Euality Supervision,Ministry of Railway, Beijing 100045, China
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Abstract
The only head driving distance of the engineering of Beijing underground diameter line is 5.2 km, thus controlling the precision of tunnel transfixion is difficult. Based on the analysis of the measuring accuracy, only through the wire line can not satisfy the design requirements of provisions error limit. Eventually, methods like wire directly orientation, adding the gyro in the tunnel and control net of wire of ground and underground in close connection are determined. These increased the lateral error precision of piercing,and achieved expected effect.
Keywords
shield ; long distance ; only head driving ; control measuring
References
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