Abstract:

Due to the influence of the highrise building under construction, the existing power cable tunnel that passes underneath the highrise building is subject to complex loading conditions. In order to avoid serious deformation of the power cable tunnel, monitoring measurement plan is worked out. Convergence monitoring and lining surface stress monitoring are made for the tunnel and the monitoring results are analyzed. The monitoring result shows that although the construction of the highrise building above the tunnel has some influence on the tunnel, the deformation of the surrounding ground of the tunnel is small, the convergence slow down when the highrise building is topped out and the crown settlement of the tunnel is larger than the horizontal convergence. Therefore conclusion is drawn that the tunnel is stable.