Ultrahigh integrated plastic-steel grid reinforced soil abutment retaining wall structure and construction method thereof

The invention discloses an ultrahigh integrated plastic-steel grid reinforced soil abutment retaining wall structure and a construction method thereof. The structure comprises a first-level abutment, a second-level abutment, a third-level abutment and a fourth-level abutment which are distributed in a stepped mode from top to bottom along a mountain. The first-level abutment comprises a plurality of layers of integrated plastic-steel grids, a first-level bagged aggregate layer is arranged on the outside of the integrated plastic-steel grid away from the mountain, and a reinforced concrete panel is arranged on the outside of the first-level bagged aggregate layer. The second-level abutment, the third-level abutment and the fourth-level abutment each comprises a plurality of evenly distributed integrated plastic-steel grids, an aggregate reversed filter is arranged at the front ends of the integrated plastic-steel grids, a panel is arranged outside the aggregate reversed filter, a cap beam is arranged at the bottom of the panel and the bottom of the aggregate reversed filter, the cap beam is provided with a platform, and a catchwater is arranged on the platform. Compared with a traditional reinforced soil structure, the ultrahigh integrated plastic-steel grid reinforced soil abutment retaining wall structure has the advantages of being short in work time, convenient and quick to construct, high in strength, high in bearing capacity, large in friction coefficient, high in shock resistance, small in occupied space and the like.