Same-pile connection prefabricated spliced bottom plate and splicing structure and installing method thereof

The invention discloses a same-pile connection prefabricated spliced bottom plate. The same-pile connection prefabricated spliced bottom plate comprises a prefabricated bottom plate component, a connecting hole used for being connected with a bottom pile is reserved in the prefabricated bottom plate component, a steel ring is embedded in the inner wall of the part, along the connecting hole, of the prefabricated bottom plate component, and a water stop steel plate used for construction joint water prevention is arranged at the middle portion, in the vertical direction, of the steel ring and isfixedly connected with the steel ring. The invention further discloses a splicing structure using the above prefabricated spliced bottom plate and an installing method. The installing method comprises the steps that the prefabricated bottom plate component is hoisted, pile steel bars and the water stop steel plate are welded, and concrete pouring is conducted. The same-pile connection prefabricated spliced bottom plate,