Prefabricated pile plate type supporting structure system applying transverse prestress and integrating water stopping and supporting and construction method

The invention relates to a prefabricated pile plate type supporting structure system applying transverse prestress and integrating water stopping and supporting and a construction method. The prefabricated pile plate type supporting structure system comprises a square pile and flange plates, prefabricated pile plates are arranged on the two sides of the square pile, the flange plates are arranged on the two sides of each prefabricated pile plate, and the multiple prefabricated pile plates are sequentially arranged; the end faces of the flange plates on the two sides are provided with grooves and tenons respectively, the grooves and the tenons on the adjacent prefabricated pile plates are in butt joint, the prefabricated pile plates are provided with pre-stressed anchor cable preformed holes, pre-stressed steel strand preformed holes and pre-stressed steel strands, and each prefabricated pile plate is composed of a starting point prefabricated pile plate, a standard section and an end point prefabricated pile