Comprehensive large-section immersed tunnel fire hazard experiment method

The invention discloses a comprehensive large-section immersed tunnel fire hazard experiment method which comprises the following steps: a, preparing an experiment oil disc for simulating fire hazard inside a formed tunnel structure; b, injecting water of a set liquid level into the experiment oil disc, and injecting fuel oil of a set liquid level into the experiment oil disc; c, igniting to combust the fuel oil in the experiment oil disc to start the experiment, and acquiring the parameters and analyzing the data. Due to the adoption of the comprehensive large-section immersed tunnel fire hazard experiment method, real fire hazard scenes can be simulated and monitored, real fire hazard scenes of the tunnel can be simulated under experiment conditions, real fire hazard data of the tunnel under different conditions can be acquired, disaster can be avoided, emergency treatment measures can be specifically taken, and significant theoretical foundation can be provided for construction and fire prevention of tunnels; by virtue of the physical properties of oil and water, oil and water are arranged in the experiment disc in different layers, so that the combustion efficiency of fuel oil can be sufficiently brought into full play, the fuel oil can be saved, auxiliary facilities such as the experiment oil disc can be effectively protected, and fire hazard or loss caused by accidents can be avoided.