RECOVERY METHOD OF GUIDING PIPE IN SMALL DIAMETER JACKING MACHINE

PROBLEM TO BE SOLVED: To provide a recovery method of a guiding pipe in a small diameter jacking machine capable of advancing boring again by inputting the guiding pipe recovered in a buried pipe laid in advance or a new guiding pipe, by easily recovering its guiding pipe to the starting shaft side...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	YAMAMOTO YOSHIHISA, MIZUTANI TOSHIYUKI, AKIYAMA HIROSHI, KODAIRA SADATADA, SUGIHIRA TSUNEO, FUJII MATSUYUKI, ANPO SHOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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