Underground space horizontal evacuation road network model and establishment method thereof

The invention provides an underground space horizontal evacuation road network model, and relates to the field of underground building safety, the underground space horizontal evacuation road network model comprises a vertical evacuation body, a chamber unit and a horizontal evacuation structure, the horizontal evacuation structure comprises a first-level evacuation channel, a second-level evacuation channel, a third-level evacuation channel and a fourth-level evacuation channel; a horizontal evacuation road structure is characterized by using a directed network topology structure, a road network model comprising a node set and an edge set is established, and the node set comprises a source node, a cross node and a termination node. The model is combined with a road network topological relation and a pedestrian confluence theory, and the feasibility and effectiveness of underground space graded evacuation are ensured, so that evacuees in the deep underground space can quickly and conveniently reach a vertical