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《Science of Surveying and Mapping》 2010-01
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Key technology and quality control of subway track laying benchmark survey

LIANG Xi-fu①,YANG Zi-qi②,LI Wei②(①China institute of geotechnical investigation and surveying,Beijing 100007,China;②Beijing zhongtianlutong construction Co.Ltd,Beijing 102218,China)  
As a high accuracy measurement project,subway track laying benchmark survey has many complex working procedures.Based on the project practice,this paper discusses the key technologies used in the subway track laying benchmark survey,and analyzes the factors influencing the survey accuracy based on the error propagation theory.Some measures are proposed to improve the precision and quality of the project.
【CateGory Index】: U212.2
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