SHIELDED PROCESSING METHOD

PURPOSE:To reduce the cost of members and enable edges to be readily pressed into the ground by using box-shaped steel sheet piles which have double arm couplings and edged end faces, as members by which a double body shell is formed as a shield edge. CONSTITUTION:Box-shaped steel sheet piles (1a),...

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Bibliographic Details
Main Authors OKIMOTO MASAYUKI, YOSHIZUMI TOSHIHIKO
Format Patent
LanguageEnglish
Published 31.07.1990
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:PURPOSE:To reduce the cost of members and enable edges to be readily pressed into the ground by using box-shaped steel sheet piles which have double arm couplings and edged end faces, as members by which a double body shell is formed as a shield edge. CONSTITUTION:Box-shaped steel sheet piles (1a), each of which has double arm coupling 5a to 5d and edged end faces, are engaged with each other by means of their couplings to form a double body shell. The double body shell is next pressed into the ground 13 as a shield edge 9. Box-shaped steel sheet piles (1a) each comprising inner and outer arms 6a to 6d which include double arm couplings 7a to 7d having set length capable of forming a double body shell and formed in such a manner as being bent downwards, are engaged with each other by means of their couplings to form a circular double body shell. Hence less members are needed and the method is suitable for drilling a short-distant tunnel or a small-sized underground space and can be carried out economically.
Bibliography:Application Number: JP19890014362