In many cases, the most inexpensive wall system (in terms of material and construction costs alone) is not the most cost-effective system when considering the "big picture." This paper summarizes the special design and construction constraints and considerations of retaining walls encountered with ...
铁路专用线 railway special line 客货运混合铁路 railway line for mixed passenger and freight traffic 列车运行图 train diagram 铁路建筑长度 construction length of railway 区间 section 区段 district 轮重 wheel load 轴重 axle load 最大轴重 maximum allowable axle load 限制轴重 axle load limited 限界图...
15 4.4.1 Temporary Construction Clearances... 15 4.4.1.1 Vertical Construction Clearances ...