EXCAVATING MACHINE FOR MODIFICATION OF TUNNEL

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

Gespeichert in:
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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Beschreibung
Zusammenfassung: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 this condition, the front trunk 1 is propelled. A pressure crush cutter 6 for ground excavation and a bit type cutter 7 are mounted on a rotary cutter head arranged at the open end of the front trunk 1, and the wall B of existing tunnel A is cut away while the bit type cutter 7 is moved in the diametric direction with enlargement and contraction. At the same time, the rock in the outer circumferential direction of the existing tunnel A is excavated by the pressure crush cutter 6, and a modification tunnel is formed as a dia. enlargement from the existing tunnel A.