It is quite important to choose a rational design and construction scheme for construction of large span tunnel.
在大跨隧道的修建中，选择一套合理的设计和施工方案是十分重要的。
The rational determination of the construction methods, which possesses important significance for the construction cost, provides reliable foundation for the construction scheme.
合理确定施工方法对于造价有着重要的意义，同时工程造价又为施工方案提供可靠的设计依据。
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