PIPE TYPE LOCK BOLT

PROBLEM TO BE SOLVED: To improve pull-out resistance of a pipe type lock bolt. SOLUTION: In a pipe type lock bolt 1 having an expansive diameter- enlargeable double pipe 2 expanded being filled with pressure liquid and provided with reinforcing sleeves 3, 5 at both ends, restraining pipes 7 are arra...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	IMOTO ATSUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
Online-Zugang:	Volltext bestellen
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