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《Urban Geotechnical Investigation & Surveying》 2012-01
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Vault Settlement Discussions and Precision Analysis of Metro Line 3 of Qingdao Tunnel Monitoring Work

Wang Jun,Li Peng(Qingdao Geotechnical Investigation and Surveying Research Institute,Qingdao 266032,China)  
This paper introduces Monitoring of tunnel engineering of Metro Line 3 of Qingdao,and considers vault settlement methods of measurement,precision analysis and notes,for the purpose of the selection of methods of monitoring crown settlement under different geological conditions and different tunnel support structure.In the contact measurement,the use of invar hanging ruler and hook foot tower improves the work efficiency.With vertical angle and distance under control in a certain range,the trigonometric leveling method can also be applied to the tunnel crown settlement measurement.It can greatly reduce the work intensity,and improve work efficiency.
【CateGory Index】: U456.3
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