Construction method of steel pipe pile bailey truss foundation full-space support system

The invention relates to a construction method of a steel pipe pile bailey truss foundation full-space support system. The construction method comprises the following construction steps of 1) construction preparation; 2) erection of a steel pipe pile guide construction platform; 3) installation of a pile cap of a steel pipe pile sinking pile; 4) guide driving of a steel pipe pile; 5) extension construction of the steel pipe pile; 6) arrangement and positioning of a profile steel bottom beam; 7) arrangement of bailey beams; 8) arrangement of distribution beams; 9) laying of a platform plate; and 10) counter-force prepressing of the platform. The construction method has the beneficial effects that a construction trestle is used as a support body of a support longitudinal beam, a support cross beam is arranged on a cantilever section of the support longitudinal beam, the position of a guide groove pipe is limited through the support longitudinal beam and the support cross beam, the erection difficulty of the ste