Stress flow conservation principle and cavern group tunnel structure design method and device

The invention provides a stress flow conservation principle and a cavern group tunnel structure design method and device. The method comprises the following steps that first parameters and second parameters are acquired, the first parameters comprise geological parameters before tunnel excavation and design parameters of two adjacent tunnels, and the two adjacent tunnels comprise a first tunnel and a second tunnel, and the second parameters comprise the stress flow actually borne by a rock wall between the two adjacent tunnels, the longitudinal length of the rock wall and the allowable range of the safety coefficient of the rock wall; the thickness of the rock wall is calculated according to the first parameters; and parameters of a supporting structure of the rock wall are calculated according to the second parameter and the thickness of the rock wall. According to the method, the stress of each rock wall in the group hole can be conveniently and quickly calculated by adopting a stress flow conservation prin