Coral reef rock underneath penetrating tunnel construction surface collapse treatment structure and method

The invention provides a surface collapse treatment structure for underneath-penetrating coral reef rock tunnel construction. The surface collapse treatment structure comprises a protective layer, a concrete filling layer, a retaining wall and a plurality of reinforcing columns. The protective layer is arranged on the inner surface of the surface subsidence area; the concrete filling layer is filled in the surface subsidence area; the retaining wall is arranged in the tunnel and used for supporting the tunnel face subsidence area. According to the surface collapse treatment structure for underneath passing coral reef rock tunnel construction, the protective layer is arranged in the surface collapse area, the concrete filling layer is arranged to seal the whole surface collapse area, further collapse of a soil body is avoided in cooperation with the retaining wall, the reinforcing columns are punched and injected, and the surface collapse treatment effect is improved. The reinforcing columns extend into a rock