Crown beam foundation trench upright construction and cover-excavation method station combination structural system and construction method

The invention relates to a crown beam foundation trench upright construction and cover-excavation method station combination structural system and a construction method. A traditional cover-excavation method construction method has multiple defects. The system comprises a retaining pile, a crown beam, a semicircular pile, temporary stand columns and a cover-excavation station top plate; the crown beam is located on the top of the retaining pile, the top of the crown beam is provided with the semicircular pile, and the cover-excavation station top plate is built at the position, located on the top of the crown beam, of the inner side of the semicircular pile; the lower portion of the cover-excavation station top plate is supported by the vertical temporary stand columns, and the inner side of the retaining pile is supported by the horizontal temporary stand columns; and the phenomenon that the retaining pile participates in stress is fully utilized, road loads transmitted down by the cover-excavation top plate