Tunnel high-rigidity superimposed structure inverted arch and construction method

The invention provides a tunnel large-rigidity superimposed structure inverted arch and a construction method. The inverted arch comprises an inner-layer lining inverted arch and an outer-layer supporting inverted arch, the inner layer lining inverted arch and the outer layer supporting inverted arch are stacked into a whole through an anchoring shear-resistant piece. According to the tunnel large-rigidity superimposed structure inverted arch provided by the invention, the inner-layer lining inverted arch and the outer-layer supporting inverted arch are superimposed into a whole through the anchoring shear-resistant piece, and the inverted arch structure can increase the rigidity of the inverted arch and enhance the bearing capacity and deformation resistance of the inverted arch; the problem that in an existing tunnel, an inverted arch swells due to the fact that the inverted arch bears too high ground stress is solved. According to the construction method, due to the fact that a large number of assembly typ