铁路运营隧道接长明洞方案研究

The tunnel extending open cut ones for railway operation scheme research

以既有陇海线天水至兰州段上行线鸡儿架隧道接长明洞工程为例,针对运营铁路隧道增建明洞存在的施工难度大、施工场地受限、工作量集中、工期紧、行车安全等突出性难题,从施工技术和改善运营条件出发,选取了最优方案,并通过各施工工序的紧密衔接,最大限度减少了隧道接长明洞工程对运营的干扰,降低施工风险,节省工程造价,为此类工程提供了一种全新的设计思路。

As an example of existing Jierjia tunnel extending open cut ones project in upper line of Tianshui to Lanzhou section of Longhai railroad,also according to the construction difficulty,confinement of construction site,workload centralization,tight schedule,driving safety and other outstanding problems existing in tunnel extending open cut ones for railway operation,we selected the optimal scheme starting from the construction technique and improvement of the operating conditions. Meanwhile,we provide a brand new design method for this kind of engineering to utmostly minimize the interference of tunnel extending open cut ones engineering for operation,reduce the risk of construction and save project cost by connecting various construction processes closely.