Pile-supported embankment with large-area round pile caps of cross beams and construction method of pile-supported embankment

The invention relates to a pile-supported embankment with large-area round pile caps of cross beams and a construction method of the pile-supported embankment. Firstly, an embankment foundation is constructed, and cylindrical piles are driven into the foundation in an array mode; connecting beams are mounted on column bodies close to the upper ends of the cylindrical piles, so that the multiple groups of cylindrical piles are connected into a whole; a pile cap is mounted at the upper end of the cylindrical pile; a first reinforcing piece is installed between the pile cap and the cylindrical pile; a second reinforcing piece is mounted between the pile cap and the connecting beam; and a mattress layer is laid at the upper ends of the cylindrical piles, so that the pile caps are embedded into the mattress layer. According to the construction method, the anti-settling capacity of the embankment is improved, lateral displacement of a single pile is restrained, when the foundation is affected by seepage of rainwate