Integral supporting structure for multi-arch tunnel

The utility model discloses an integral supporting structure of a multi-arch tunnel, which is used for supporting operation of multi-arch tunnel engineering, and comprises a plurality of groups of annular profile steel lagging jacks which are longitudinally arranged and fixedly connected in mirror symmetry, the annular profile steel lagging jacks adjacent in mirror symmetry are fixed through Y-shaped nodes, and the Y-shaped nodes are fixedly connected with the annular profile steel lagging jacks. A plurality of groups of longitudinal profile steel arches are arranged among the plurality of groups of longitudinally arranged annular profile steel arches which are fixedly connected in a mirror symmetry manner, the longitudinal profile steel arches are fixed with the annular profile steel arches through annular longitudinal nodes, and transverse profile steel arches which are vertically fixed with the longitudinal profile steel arches are arranged among the annular profile steel arches which are adjacent in a mir