STRUCTURE OF VERTICAL SHAFT WALL WHICH SHIELD HAS REACHED

PURPOSE:To make easy and quick removal of a portion through which a shield is to pass. CONSTITUTION:In a vertical shaft which is surrounded by a side wall 2 and reached by a shield, a portion of the vertical shaft side wall 2 through which a shield machine 3 is to pass is cut at its edge to form a b...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	NAITO TEIJI, ISA HIDE, HASHIMOTO ISAO
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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