Drilling enlarging-borehole combined drill for formation of pedestal mud-jacked pile

The utility model relates to a drilling enlarging-borehole combined drill for the formation of a pedestal mud-jacked pile, which belongs to a construction device of a pile foundation. The drill of the utility model is formed by that a screw drill and an enlarging-borehole device are combined. The en...

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Bibliographic Details
Main Authors FENGMEI LU, JIANDONG BI
Format Patent
LanguageEnglish
Published 08.03.2000
Edition7
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:The utility model relates to a drilling enlarging-borehole combined drill for the formation of a pedestal mud-jacked pile, which belongs to a construction device of a pile foundation. The drill of the utility model is formed by that a screw drill and an enlarging-borehole device are combined. The enlarging-borehole device is arranged in the hollow part of the screw drill. A sleeve (9) is additionally installed on the enlarging-borehole device. A sleeve body is provided with vertical connecting teeth (14) which are engaged with vertical connecting teeth (13) of the screw drill. The outside of an inverted cone lower cover (10) is provided with screw vanes (15) which are convenient to drill.
Bibliography:Application Number: CN1998240309U