crd excavation method

基本解释

The result indicates that the CRD method is the proper construction method on this condition and gives the proper distance between the second lining and the excavation face.
结果表明，CRD法是该级围岩条件下的合理工法，同时给出了二次衬砌应滞后掌子面的合理距离。
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Successful application of CRD method at the excavation of the three-track tunnel in Hekou station provides the reference for tunnel engineering construction of Dalian area and similar conditions.
CRD法在大连地铁河口站折返线三线隧道开挖的成功实施，可为大连地区及类似条件下的隧道建设提供工程参考和借鉴。