On rationality of the construction methods for wearing tunnels

摘要

A certain tunnel wears under the highway, and the clear distance from its vault to the highway pavement is about 3.5 to 5 meters. To ensure that the safety of the highway structure under the construction process, it is required to strictly control the surrounding rock of the tunnel from deforming, partly destroyed or losing stability. In this paper, the software Z_Soil3D is adopted to make a stimulated calculation and analysis of 6 suggested construction schemes under the dynamic process of construction. Besides, a comprehensive evaluation was made mainly on four aspects, including the maximum amount of road surface subsidence, the range of road transverse subsidence, etc. And some reasonable construction methods are proposed.