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双线土质隧道的施工,在我国铁路建设工程中尚属初次尝试。这种工程由于开挖宽度大,土质软,山体压力大,拱脚容易下沉。根据过去经验,一般都采用“侧导坑先墙后拱法”(图1)施工。但由于这种施工方法工作面狭小,工序复杂,支撑使用木料多,成本高,进度受到限制,满足不了大跃进形势的要求。为了保证提前通车,加强运输力量,我局员工在党组织的直接领导下,通过领导干部、老工人、技术人员多次的“三结合”会议,破除了迷信,解放了思想,
The construction of the two-lane soil tunnel is still the first attempt in China’s railway construction project. Due to the large width of excavation, this project is characterized by soft soil, large pressure on the mountain, and easy sinking of the arch feet. According to past experience, the construction of “side guide pit first wall rear arch method” (Figure 1) is generally adopted. However, due to the narrow working face of this construction method, the complex process, the use of supporting timber, high cost, the progress is limited, can not meet the requirements of the Great Leap Forward situation. In order to ensure the opening of the train in advance and enhance the transportation force, under the direct leadership of the Party organization, the staff of the Bureau through the “three-in-one” meeting of leading cadres, old workers, and technical personnel has broken through superstitions and liberated thoughts.