Pile sinking construction method for drilling and implanting precast pile

According to the pile sinking construction method for precast pile drilling implantation, an orifice integrated platform is of a profile steel combined structure and has the functions of limiting adjustment, precast pile temporary fixing and later concrete pouring guide pipe bearing, a hoop device is arranged during pile sinking and used for fixing a precast pipe pile, pile splicing and the like, a hoop is dismantled before concrete pouring, and the construction efficiency is improved. The support points of the structure are peripheral soil bodies and are fixed by driving steel piles and the like. According to the method, mature processes are ingeniously combined, major dangerous sources are not involved in the construction process, used machine tools and equipment are conventional, and the construction safety risk is reduced. Compared with cast-in-situ bored pile construction, the implanting method of firstly drilling and implanting the pile and then filling the joint is adopted, so that the manufacturing co