Measurement and Analysis of 3-Lane Carriageway Tunnel

摘要

In connection with the construction of Tanyugou Tunnel of Badaling Freeway, some typical sections are selected for measuring the stress of steel grid reinforcement and preliminary supporting concrete. The variation pattern and stabilization time of the internal supporting forces of various kinds of wall rocks are obtained from the measurement results, and physical mechanics parameters also worked out through reverse calculation. All these results are timely returned to the designer and constructor for necessary readjustment of supporting parameters and ways of construction. This measure has ensured the safe, cost-saving and speedy construction of this project. This paper also proposes herein the parameters of shotcrete-with-anchor rod supports for 3-lane carriageway tunnel.