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随着我国基础设施建设的加快及设计理念的转变,长大隧道(洞)在公路、铁路设计中所占比例越来越大,如何在不同的地质条件下实现长大隧道的安全快速施工,成为隧道工程施工技术的关键。长大隧道的施工方案成为了决定工程项目成败的重要环节。平行导坑具有超前地质预测预报、加快施工进度、运营通风及排水等作用,因此,采用平行导坑作为隧道施工主要辅助工程的施工技术方案,在长大隧道中具有重要的应用价值。
With the acceleration of infrastructure construction and the change of design concept, the proportion of long tunnels (tunnels) in the design of highways and railways is increasing. How to realize the safe and rapid construction of long tunnels under different geological conditions, Become the key of tunnel construction technology. The construction program of the tunnel has become an important part of the success of the project. The parallel pit has the functions of advanced geological forecasting, speeding up the construction progress, operation ventilation and drainage. Therefore, it is of great value in long and large tunnels to adopt the construction of the parallel pilot pit as the main auxiliary project of the tunnel construction.