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地铁施工中一般采取先竖井继而横通道后开马头门进行正线施工的施工工序。广州轨道交通五号线广州火车站站竖井的开挖方案将原设计优化为在竖井下扩大直接开马头门,在确保结构稳定的同时缩短了工期,减少了二衬背后回填混凝土。
Subway construction generally take the first vertical shaft and then cross the road after opening Ma Tau door construction process for the construction of the main line. Guangzhou Metro Line 5 Guangzhou Railway Station Shaft Excavation program to optimize the original design to expand directly under the shaft open Ma Tau door, to ensure that the structure is stable and shorten the construction period, reducing the back of the second backfill of concrete.