Improvement of tunnel holing-through accuracy based on 3D total adjustment
BI Yua · Cehui kexue · 2014
Subway tunnel holing-through accuracy is affected by many factors,including the underground measurement which is one of the main sources of error and often uses traditional wire measurement and precision gyro orientation.The author selected the measurement data of automatic total station in the tunnel,and discussed the tunnel guiding accuracy using 3Dadjustment methods.The paper focused on the effects of underground control points,public observation points,tunnel diameter and observation accuracy on guiding accuracy,moreover,proposed some methods to improve the accuracy.