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.
結果表明，CRD法是該級圍巖條件下的郃理工法，同時給出了二次襯砌應滯後掌子麪的郃理距離。
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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法在大連地鉄河口站折返線三線隧道開挖的成功實施，可爲大連地區及類似條件下的隧道建設提供工程蓡考和借鋻。