EXCAVATING MACHINE FOR MODIFICATION OF TUNNEL

PURPOSE:To excavate a modification tunnel while the wall of existing tunnel is being destroyed. CONSTITUTION:The front trunk 1 of an excavator is coupled by a propulsive jack with the rear trunk 3, which is secured to the excavation wall surface by a gripper 6 installed on the rear trunk 3, and in t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SATO HIROMI, ENDO TAKANARI, ASAHI TOSHINORI
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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