Main claim: 1. A prefabricated spiral fitting comprising a pile body and a pile tip, characterized in that the pile body comprises a precast concrete pile disposed above and a steel pipe pile disposed below, the pile body end a rotating cap, a lower end of the pile is provided with a pile tip, and a top of the pile tip is provided with a ring-shaped steel plate for reducing the friction of the pile soil, and Diamètre ya plaque ya acier annulaire ezali monene koleka diamètre ya nzoto ya pile na 1 à 5 cm. Surface ya nzoto ya pile ezali na rainure spirale oyo ebongisami na bolai ya nzoto ya pile.
A concrete prefabricated spiral fitting for building, which mainly comprises a pile core with a trapezoidal section spiral disk on an outer circular surface, a pile body formed by dividing the upper and lower end plates of the inner end of the pile core, and an end plate and an end plate The upper end of the wing plate and the two plugging end plates with two opposing pressure pads for the grouting hole, the through hole in the pile core and the square Libulu ya kati mpe plaque ya suka ya nse ya plaque ya suka ya likolo ezali arrondi na libulu ya kati mpe libulu ya grouting ya plaque ya suka ekangami. pile préfabriquée ekoki kokitisa bosoto ya zinga zinga mpe ya makelele na tango ya botongi, mpe mosala ezali pete, oyo ekoki kobomba mingi mosala mpe kobongisa efficacité ya botongi.
