METHOD FOR BUILDING OF CAST-IN-PLACE PILE Russian patent published in 1999 - IPC

FIELD: construction engineering. SUBSTANCE: method can be used for building of cast-in-place piles in loose ground such as sandy, unstable, filled-up, floating, etc. According to method, bore-hole is drilled at reverse rotation of auger-type drilling tool being loaded by pressure. Then, working material is delivered through bore-hole head to bottom face of bore-hole under pad of drilling tool at reverse rotation of auger-type drilling tool over its external surface. Working material is compacted by pad of auger-type drilling tool under pressure brought to bear on drilling tool at reverse rotation and by loading it with pressure by pushing auger-type drilling tool out of bore-hole by compacted working material. Application of aforesaid method allows for producing cast-in-place piles of high quality, improved load-bearing capacity together with widening number of types of working materials used in casting piles. EFFECT: higher efficiency. 5 cl, 4 dwg