Tunnel heat preservation and shock absorption element and construction method thereof

The invention belongs to the related technical field of tunnel matching structures, and discloses a tunnel heat preservation and shock absorption element which adopts a rubber shock insulation pad form and is sequentially arranged between a primary support and a secondary lining in the circumferential direction of a tunnel, the first side face, close to the primary support, of the rubber shock insulation pad is a flat surface, and the second side face of the rubber shock insulation pad is a flat surface. A plurality of expansion bolts are used for fixing with the primary support; the second side face, close to the secondary lining, of the rubber shock insulation pad is of zigzag surface structures which are arranged at intervals, and independent hole-shaped structures are formed between the adjacent zigzag surface structures. The second side face is attached to the secondary lining through the waterproof layer. The invention further discloses a corresponding construction method. According to the invention, th