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《Beijing Surveying and Mapping》 2009-03
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Design and Discussion on Holing Through Error of Urban Mass Transit

WANG Yi (The Rail Transit Project Construction Headquarters Of NingBo Municipality Zhejian Ningbo 315010 China)  
One of the main tasks of urban mass transit project construction survey is to ensure holing through the tunnel,its holing through error will affect the quality of construction and engineering costs. An important research task of surveying in urban mass transit project is to design holing through error and tolerance value. This paper includes three parts:the concept of holing through error of urban mass transit project,how to analize the threshold value of error,the surveying method of urban mass transit project and how to distribute holing through error. The paper provides useful things to reference for the majority of measuring workers.
【CateGory Index】: U452.1
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