Permanent and temporary combined type steel inner support for deep foundation pit cover excavation construction

The utility model relates to a permanent and temporary combined type steel inner support for deep foundation pit cover-excavation construction, which comprises a beam body, a plurality of supporting columns, a plurality of supporting columns, a plurality of supporting columns and a plurality of supporting columns, and is characterized in that the beam body is horizontally arranged in a deep foundation pit; the steel pipe columns are arranged at intervals in the length direction of the beam body and penetrate through the beam body; the hoop pieces are fixedly arranged outside the steel pipe columns in a sleeving mode in a one-to-one correspondence mode; and the profile steel is arranged between every two adjacent steel pipe columns, fixedly connected with the outer surfaces of the hoop pieces, arranged in the beam body and located on the side close to the bottom face of the beam body. According to the technical scheme, the overall structural strength is high, profile steel does not need to be dismantled, the u