Supporting structure for underground obstacle breaking treatment construction pilot tunnel and capable of being cut by shield and construction method

The invention discloses a supporting structure for underground obstacle breaking treatment construction pilot tunnel and capable of being cut by a shield and a construction method. The supporting structure comprises a grid rib. The grid rib is an assembled grid A. The assembled grid A comprises a bottom grid rib and an arch top grid rib. The bottom grid rib is of an integrated structure composed of a bottom surface grid rib and vertical support ribs on both sides. The arch top grid rib is of an integrated structure composed of an arch-shaped top rib and vertical ribs on both sides. The bottomgrid rib and the arch top grid rib form the assembled grid A by the vertical support ribs on both sides being bound and connected with the vertical ribs on both sides. The shape of the assembled gridA corresponds to the shape of the processing construction pilot tunnel. The bottom grid rib of the assembled grid A is a glass fiber glass fiber bar grid rib. The arch top grid rib is a steel bar gridrib. An assembled initial