The invention relates to the field of tunnel quakeproof, in particular to a multi-stage energy dissipation
toughness quakeproof structure of a cross-fault tunnel, which comprises a tunnel main body, a
metal lining connected to the outer side of the tunnel main body, a concrete lining arranged at the bottom of the
metal lining, an
alloy frame A arranged on the inner side of the tunnel main body, and an
alloy frame B connected to one side of the
alloy frame A, a
metal guide rail is installed on the outer side of the alloy frame B, a modular friction
energy consumption block capable of preventing shock is installed between the alloy frame B and the metal guide rail, a filling layer capable of damping a tunnel is arranged on one side of the modular friction
energy consumption block, and a viscoelastic
damper is installed among the alloy frame A, the alloy frame B and the metal guide rail in a penetrating mode. The modular friction energy dissipation block and the viscoelastic
damper are cooperatively arranged, and the friction energy dissipation block forms stable friction resistance through a pre-tightening structure and is used for absorbing large-displacement energy; the viscoelastic
damper continuously consumes energy for small and medium amplitude vibration through material
internal friction.