Drill bit for breaking waste pipe pile, and method for breaking waste pipe pile and pouring new pile

The invention discloses a drill bit for breaking a waste pipe pile, and a method for breaking the waste pipe pile and pouring a new pile. The drill bit comprises a core shaft, spiral blades are arranged at the external circumference of the core shaft, and a connecting part in butt joint with a drill...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	YUAN JING, SHEN YUANZHI, LIAO FENG, YUAN TIANSHUN, HUANG HAIDA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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