Damping self-resetting tunnel structure for fault fracture zone

The invention provides a shock-absorbing self-resetting tunnel structure for a fault fracture zone, which at least comprises a common section and an expanding excavation section corresponding to the fault fracture zone, the expanding excavation section sequentially comprises a primary lining layer, an elastic shock-absorbing layer and a secondary lining layer from outside to inside, the primary lining layer is in contact with surrounding rock, and the elastic shock-absorbing layer is filled with an elastic shock-absorbing material; the second lining layer is formed by sequentially connecting a plurality of pipe joints, and the pipe joints are connected and fixed through memory alloy springs; a reset frame is arranged at the bottom of the second lining layer; reset elastic arms are transversely arranged between the two side faces of the reset frame and the inner wall of the initial lining layer, and elastic damping rods used for damping and electric push rods used for resetting are arranged in the reset elasti