正台阶预留核心土法在大断面软弱围岩公路隧道施工中的应用

Application of Bench Reservation Core Soil in Tunnel Construction of Soft Surrounding Rock with Full Section

本文介绍了老山隧道采用正台阶预留核心土法圆满完成大断面软弱围岩段施工,取得了良好的经济效益和社会效益,可供类似性质工程借鉴。

By comparison and selection of Laoshan Tunnel of Ninghuai Expressway, this paper put emphasis on the application of bench reservation core soil in the Laoshan Tunnel. By effective monitoring and measuring means, the construction of soft surrounding rock with full section has been completed. The good economic benefits and social benefits have been achieved. Summary has been made regarding the problems in the construction of tunnels with large section, which can be referred as the same works.