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AN IMPROVED DATA PROCESSING METHOD OF SHAFT AFFILIATION SURVEY OF SHIELD ENGINEERING

Taking the Gouwugongyuan Xiangmihu segment of Shenzhen subway shield tunnel as an example, the method and the process step about setting up control net,measuring horizontal angle and chaining side as transferring control net’ coordinates and azimuth from ground to underground are introduced,and the factors influencing accuracy of shaft affiliation survey are analyzed. Aiming at the characteristics of shaft affiliation survey, an improved way processing data about shaft affiliation survey is put forward. The conclusions from result and accuracy analysis on data processing show that: it must be specified to regulate the figure of connection triangle, and horizontal angle survey, and sides measure and its correction of temperature and scale factor. Using the improved data processing method, the tunnel’s holing through and its accuracy can be assure.