随着西部高速公路的大规模建设，受地形和施工场地的限制，小净距隧道已越来越多地在工程实际中使用。
As large scale construction of highways in West China, more small spacing tunnels have been adopted due to the limitation of landscape.
随着西部高速公路的大规模建设，受地形和施工场地的限制，小净距隧道已越来越多地在工程实际中使用。
As large scale construction of highways in West China, more small spacing tunnels have been adopted due to the limitation of landscape.
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