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| Application of Cross-section Measurement System in Measurement of Wall Rock's Change of Tunnel |
| CHEN Shu-guang |
| China Railway 18th Bureau Group, Tianjin 300222, China |
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Abstract Research purposes：Using Leica cross-section measurement system to measure the clearance displacement change of the wall rock of tunnel can rapidly obtain the measured result of the wall rocks' change of tunnel with giving the visual and accurate grapy table and data because the pre-installed software of the system can automatically collect the data on the clearance displacement change and the data can be analyzed and processed by post-processing software. This measured result can be the basis for judgment of the stability of wall rock and for construction.
Research conclusions：Using Leica cross-section measurement system to measure the clearance displacement change of the wall rock of tunnel is feasible, getting good results in judgments of the stability of wall rock and the support effect and also in finding the change of the wall rock. By using this system, the accuracy and reliability of the data can be improved and the manual error can be reduced, so the measured result from this system can be as scientific and reasonable basis for tunnel construction to ensure the construction quality and security and speed up the process of tunnel construction, and also can be as the important basis for optimizing the tunnel design.
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Received: 17 December 2009
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2010, Vol. 27 
