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。
The results provide some reference for the blasting construction of the tunnels with small spacing.
所得结论对小间距隧道爆破施工有一定的参考价值。
Up to now there are no explicit specifications in our country for the design and construction of twin tunnels with small spacing.
在现行的隧道设计施工规范中，还没有明确规定小净距隧道的设计、施工规程。
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