Sectional assembly construction method for light bracket set

The invention discloses a light bracket set segmented assembly construction method. The method comprises the steps that prefabrication is conducted; components of the bracket system are prefabricated in a segmented mode through lightweight concrete, and the components are lifted and transported to a to-be-installed position through workers; matching the components; the grooves of the upper-layer bucket arch component and the lower-layer bucket arch component are matched, so that the upper-layer bucket arch component and the lower-layer bucket arch component are embedded together and accurately positioned, and a prefabricated bucket arch is formed; matching a main structure; the prefabricated bracket is connected with the main body steel bars to form a complete bracket structure, and concrete is poured into the main body steel bars; building a support; a steel bar supporting structure is built on the outer side of a concrete body formed by pouring the prefabricated bracket set and the main body steel bars till