Presently, the complete loading calculation mode is widely used as the design method of the metro station, but the vertical load from the temporary road surface system isn't taken into account.
目前，我国地铁车站设计中普遍采用的一次加载的计算模式，也没有考虑盖挖施工临时路面体系传递的竖向荷载。
Because of no existing road available, high cost for temporary road, and a huge damage to the Surroundings, when constructing highways in desert, step-by-step method was used usually.
沙漠公路由于地处沙漠，无现成道路可供施工使用，修筑便道成本费用高，且对环境破坏较大，一般采用递进法施工。
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