COMPARISON AND SELECTION OF EXCAVATION METHODS FOR WATER-RICH TUNNEL WITH SUPER LARGE SECTION
The Songshan tunnel of the Shao-Xin expressway passes through a water-rich area,and there is an obvious water gushing phenomenon during the excavation process.In order to select a reasonable excavation method,based on the geological data of the tunnel,the finite element software FLAC 3D was used to simulate two excavation methods,the full face excavation method and the upper and lower bench method.The research results show that:when the water pressure is small,it is better to use the full face excavation method,and when the water pressure is high,it is better to use the upper and lower bench method for construction.The research conclusions have certain reference significance for the selection of excavation methods for water-rich tunnel with super large section.
water-richsuper large section tunnelexcavation methodsnumerical simulation
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