Ultralong hollow spiral grouting anchor rod connection piece

Ultralong hollow spiral grouting anchor rod connection piece

The invention provides an ultralong hollow spiral grouting anchor rod connection piece which is used for connecting anchor rods of ultralong supports. A front end anchor rod body and a front end connection piece are welded, a tail end anchor rod body and a tail end connection piece are welded, a gro...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZHANG LIMIN, LIN YUNHONG, GENG LUYUN, ZHANG JIAN, ZHANG GUANGMING, ZHANG JIAMIAN
Format: Patent
Sprache:chi ; eng
Schlagworte:
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Beschreibung
Zusammenfassung:The invention provides an ultralong hollow spiral grouting anchor rod connection piece which is used for connecting anchor rods of ultralong supports. A front end anchor rod body and a front end connection piece are welded, a tail end anchor rod body and a tail end connection piece are welded, a grouting hole is respectively drilled at the centers of the front end connection piece and the tail end connection piece, and a grout vent hole is reserved at the tail end of the tail end anchor rod body. The connection piece is high and reliable in strength, high pressure grout can smoothly flow through the grout vent hole, and a spiral anchor rod and the connection piece can be smoothly screwed into a coal roadway anchor hole.