FIELD: construction. SUBSTANCE: apparatus has hollow cylindrical working member 1 with ports 7 at the top part and crown drilling instrument 2 secured to its end. Outer side surface of the working member is provided with a means for supplying steam made of hollow screw blade 3 with openings for flowing steam. Working member 1 is received in the hollow of the pile and bears on its top face through bearing ring 4. When rotating drilling is carried out a ring space is formed simultaneously with freezing out of soil. Design of the working member provides maintaining soil freezing out up to the end of drilling. The hollow pile is sank to the ring space simultaneously with its formation. EFFECT: enhanced efficiency. 3 dwg
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Authors
Dates
1994-03-15—Published
1987-01-29—Filed