METHOD FOR RAMMING DOWN PITS WITH EXTENDED UPPER PART Russian patent published in 1994 - IPC

Abstract RU 2005848 C1

FIELD: hydraulic engineering. SUBSTANCE: method includes formation of leading hole and its reaming by lowering and withdrawing of tamper and ground filling. Widened part of hole is formed by cutting off ground from walls of leading hole during lowering tamper with ground accumulation in it, and ground filling is effected with accumulated ground during lifting the tamper. EFFECT: higher efficiency. 4 dwg

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RU 2 005 848 C1

Authors

Sturov V.I.

Dmitriev N.E.

Burmistrov Ju.G.

Gritskov N.A.

Dates

1994-01-15—Published

1991-12-17—Filed