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| SURVEYING DISTRIBUTION OF GPS CONTROL NETWORK FOR EXTRA-LONG TUNNEL AND ITS ACCURACY |
| ZHANG Xiang-duo |
| Tunnel Engineering Bureau of MOR |
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Abstract Taking the Qinling Tunnel engineering project as example and the survey and design as presupposition, the paper expounds the surveying distribution method by using the GPS control network for the extra-long tunnel, including the design of working scheme, outdoor reconnaissance and the resolving calculation and evaluation of traverse's vectors, the lateral error of control network and its accuracy and reliability, etc. At the same time, the relative existing problems in surveying distribution and the matters for which attention should be paid are also introduced briefly in this paper.
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Received: 05 October 2001
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[2]新建铁路工程测量规范(送审稿)[S].铁道部第二勘测设计院,1997.
[3]秦岭隧道洞外GPS平面控制网第二次复测成果书[R].铁道部隧道工程局勘测设计院(张项铎),1997.
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2001, Vol. 18 
