LONG STEEL PIPE FOREPILING METHOD

PROBLEM TO BE SOLVED: To provide an inexpensive long steel pipe forepiling method with high safety and proper workability.SOLUTION: In a long steel pipe forepiling method, forepiling is performed by injecting a solidification material into the surrounding natural ground from the inside of a pluralit...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ADACHI TADAHIKO, ASAI YOSHINORI, ASAI TSUTOMU
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an inexpensive long steel pipe forepiling method with high safety and proper workability.SOLUTION: In a long steel pipe forepiling method, forepiling is performed by injecting a solidification material into the surrounding natural ground from the inside of a plurality of steel pipes 7 radially driven ahead of a cutting face, in advance of tunnel excavation. The double steel pipes 7 or more are arranged in upper and lower positions, in a cross-section of a forepiling section.