TUNNEL TIMBERING PATTERN SELECTING METHOD

PROBLEM TO BE SOLVED: To clarify a timbering pattern change standard. SOLUTION: A seismic exploration is made prior to excavating an unexcavated part of a tunnel 10. In the case of making the seismic exploration, an oscillating hole and a receiving hole are excavated. Elastic wave emitted from the o...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ONISHI YASUYUKI, YOSHIOKA HISAYA, TAYU MASATAKA
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LARGE UNDERGROUND CHAMBERS MEASURING MINING PHYSICS SHAFTS TESTING TUNNELS
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