A cone - shaped bottom whirlpool caisson construction method against excessive sink

The present invention provides a method of preventing over-conical bottom sink whirlpool caisson construction, disposed between the locking feet caisson and a lower conical bottom leg edge; the wall is divided into upper and lower two portions divided construction; the upper end of the upper portion of the wall disposed outside the tray, which is provided outside the lower end of the joist; construction, first calculate the locking feet, joists and the tray size, and the reinforced concrete strength; then using a lower portion of the wall construction method caisson and locking feet construction; simultaneously after the wall construction and the upper joists; sand then backfilled with stone outside the wall, then the pallet construction; followed by a conical bottom and the conical bottom shovel reinforced concrete construction; stable final construction flow plate, the inner cylinder and the internet. The method of the conical bottom whirlpool caisson construction against excessive heavy use of "a lock two care" convenient technology, construction, easy operation and construction of safer, more time-saving, can effectively solve the conical bottom caisson construction method whirlpool excessive subsidence, tilt, sudden wounding and other technical problems.