Retractable corrugated plate structure suitable for soft rock tunnel and design method

The invention provides a retractable corrugated plate structure suitable for a soft rock tunnel and a design method, and belongs to the technical field of tunnels and underground engineering. The retractable corrugated plate structure suitable for the soft rock tunnel is composed of an isolation plate, an elastic corrugated plate and filler behind the plate, the elastic corrugated plate and the isolation plate are fixed to surrounding rock through anchor rods or rivets, the filler behind the plate ensures that the pressure of the surrounding rock evenly acts on the elastic corrugated plate, and the isolation plate reserves enough deformation space for the elastic corrugated plate. According to the retractable corrugated plate structure suitable for the soft rock tunnel, on one hand, surrounding rock is allowed to release part of crustal stress through deformation, the self-bearing capacity of the surrounding rock is exerted, on the other hand, the elastic corrugated plate shrinks evenly in the radial directio