DOI: 10.3724/SP.J.1201.2011.01026

South-to-North Water Diversion and Water Science & Technology (南水北调与水利科技) 2011/9:1 PP.26-28

Study on the Survey Datum Construction for the Middle Route of South-to-North Water Diversion Project

Based on a detailed examination on existing survey system in the project area and aimed at the characteristics of the Middle Route of South-to-North Water Diversion Project,a survey datum with multiple levels,, high precision and large range was constructed to meet the project construction requirements.It mainly consists of B-level GPS mainstay networks,C-level GPS networks,second order leveling network for channel route,and construction control network for buildings.It found a way out of incompatibility in time and space between network pointsand provided useful experiences for other similar long-distance projects in terms of survey datum construction method,control grade,technical specifications and data processing.

Key words:the Middle Route of South-to-North Water Diversion Project;survey datum;construction control network;1° dividing zone

ReleaseDate:2014-07-21 15:58:51

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