CONSTRUCTION METHOD FOR ENLARGING TUNNEL CROSS SECTION AND PROTECTIVE STRUCTURE FOR GENERAL VEHICLE WITHIN TUNNEL

PROBLEM TO BE SOLVED: To perform construction work for enlarging the cross section of an existing tunnel while maintaining the passage of general vehicles. SOLUTION: The construction method for enlarging a tunnel cross section includes constructing a new tunnel 2 by digging the natural ground around...

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Main Authors HIRANO HIROYUKI, FUJIWARA YASUMASA, OBARA YOSHIYUKI, NAKAMORI JUNICHIRO, FUJINAGA TOMOSABURO, HORIUCHI HIDEYUKI, KIUCHI TSUTOMU, NOMA TATSUYA, MASHITA HIDETO, ISHIMURA TOSHIAKI
Format Patent
LanguageEnglish
Published 18.03.2004
Edition7
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:PROBLEM TO BE SOLVED: To perform construction work for enlarging the cross section of an existing tunnel while maintaining the passage of general vehicles. SOLUTION: The construction method for enlarging a tunnel cross section includes constructing a new tunnel 2 by digging the natural ground around an existing tunnel 1 to increase its width while maintaining the passage of general vehicles 7 within the existing tunnel 1 and the new tunnel 2. As the working face of the new tunnel 2 progresses, moving protector units 10 which allow general vehicles 7 to pass are connected together into a predetermined length and moved within the new tunnel 2 to construct the new tunnel 2. COPYRIGHT: (C)2004,JPO
Bibliography:Application Number: JP20020248076