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ring cut method
expl.
环状隧道开挖法
开挖隧道时,在不良的地质条件下,可采用先掘进导坑然后再开挖其他部位的施工方法。但是,当地质条件非常差,例如上半部难以一次开挖成形时,可把拱圈附近的部位开挖成环状,做好锚喷支护或衬砌后,再挖除中心部残余的凸出部分,这种方法叫环状隧道开挖法
railw.
环形开挖预留核心土法
tech.
环形开挖法
ring cut method
:
1 phrase
in 1 subject
Technology
1
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