TECHNIQUE TO ERECT ANTIFILTRATION ENGINEERING-PROTECTIVE STRUCTURE Russian patent published in 2003 - IPC

FIELD: construction industry, erection of guarding, engineering- protective structures to prevent changes in state of geological massif while protected territory is organized under conditions of closely located buildings constructed before. SUBSTANCE: technique to erect antifiltration engineering-protective structure under complicated hydrogeological conditions includes completion of guarding members in ground at some distances one from another in the form of piles and driving of piles in sections between installed piles. Novelty of approach lies in that piles are sunk into ground over perimeter of section of protected territory for foundation. They have in lower parts ripping tips and helical coiling on outer surface of bodies of revolution in the form of hollow tube or in the form of monolithic body of revolution. Each body of revolution is sunk into ground thanks to its simultaneous rotation and forcing into ground under external effort or under own weight. Then fixing and/or antifiltration material is fed into mouth of formed hole between turns of helical coiling while body of revolution is inserted and body of revolution is taken out to day surface thanks to its reverse rotation to consolidate ground wall of hole in zone of hole heel and side wall of hole with above-mentioned compacted fixing and/or antifiltration material with simultaneous filling of hole space to form pile with the use of mentioned material fed along outer surface of body of revolution during its screwing out. First sunk bodies of revolution are located at distance not less than maximal diameter of helical coiling. EFFECT: geologically safe possibility of tube sinking due to replacement of drilled out ground with body of tube at present time moment, increased bearing capability of pile, potential for organization of pile antifiltration guarding, engineering-protective structure for protected territory in crowded city conditions. 1 cl, 7 dwg