发明名称 Method and H-pile tip for driving piles in permafrost
摘要 A method for facilitating the driving of piles in permafrost featuring the use of water filled pilot holes for raising the thermal regime of the surrounding permafrost to reduce the driving resistance of the permafrost and an improved H-pile shape with a tip having a reduced flange thickness to width ratio that is advantageously utilized in connection with such method.
申请公布号 US4297056(A) 申请公布日期 1981.10.27
申请号 US19790063381 申请日期 1979.08.03
申请人 NOTTINGHAM, DENNIS 发明人 NOTTINGHAM, DENNIS
分类号 E02D5/72;(IPC1-7):E02D5/74 主分类号 E02D5/72
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