Prediction of final displacement of tunnel section during excavation

摘要

Certain points on tunnel section start to displace before measurements begin. Therefore prediction of final displacement tunnel section during excavation should be consist of these unmeasured and measured displacements. This paper is focused on methods to estimate the unmeasured displacements and to predict the total final displacements using measurement data in early stage of excavation. An exponential function and linear function are used to find out unmeasured displacements and final displacements are predicted according to total displacements at a distance of one tunnel diameter from the working face.