side-drift method 边侧导坑法
single side drift method 侧壁导坑法
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It can be concluded that from overall analysis the double-side-drift method is more suitable than the CRD method in multiple-arch tunnel with eight traffic lanes.
从总体上分析结果可知，双侧壁导坑法更适合于双向八车道连拱隧道施工。
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