Ultrahigh ground temperature tunnel supporting structure and construction method

The invention discloses an ultrahigh ground temperature tunnel supporting structure and a construction method, and relates to a tunnel supporting structure and a construction method. The supporting structure comprises a primary supporting structure and a secondary lining structure, and is characterized in that a water circulation pipeline is buried between a primary spraying layer and a re-spraying layer, a high-temperature-resistant waterproof board and an extruded polystyrene board are arranged between the re-spraying layer and the secondary lining structure, and the extruded polystyrene board adheres to the surface of the high-temperature-resistant waterproof board. The construction method comprises the steps that concrete primary spraying is conducted; the water circulating pipeline isarranged on the surface of the primary spraying layer, re-spraying is conducted, the high-temperature-resistant waterproof board and the extruded polystyrene board are paved, and the secondary liningstructure is poured. The