Longitudinal relay type tunnel super-long safety channel smoke-proof evacuation method and system

Abstract

The invention discloses a longitudinal relay type tunnel super-long safety channel smoke-proof evacuation method which comprises the following steps that S1, a tunnel fire alarm system gives an alarm to an FAS system after monitoring that a roadway has a fire, the FAS system sends an instruction, and booster fans in working wells are started to send fresh air in the working wells into a safety channel; S2, through adjustment through a residual pressure valve, a positive pressure value in the safety channel is maintained, a two-way relay jet fan in a range of 50-500 m by taking a fireproof door near a fire point as a center is started to jet high-speed airflow, and fresh air at two ends of the channel is induced to be conveyed to the fireproof door near the fire point from the working wells along the longitudinal direction of a tunnel in a relay manner; and S3, a trapped person enters a slide room / staircase through an evacuation exit near the fire point, enters the safety channel through the protection door and escapes towards the working wells at the two ends of the tunnel. The invention further discloses a corresponding system. By means of the longitudinal relay type tunnel super-long safety channel smoke-proof evacuation method and system, air can be supplied to any place in the channel in the relay manner, and personnel evacuation safety under the working condition of the fire in the middle of the tunnel is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of road tunnel safety evacuation and building smoke prevention, and in particular relates to a method and system for smoke prevention and evacuation of an ultra-long safety channel of a longitudinal relay tunnel. Background technique [0002] my country has become the country with the largest number of tunnel projects, the most complex and the fastest developing in the world. While the construction of highway tunnels brings convenience to economic development and people's production and life, it also puts forward higher requirements for tunnel safety, especially the safety of personnel evacuation in case of tunnel fire. Road tunnel operation safety accidents caused by fires are common, and some accidents have caused a large number of casualties. The safe passage of personnel in highway tunnel is the escape passage of personnel in the event of a fire accident, and its rational layout and smoke prevention mea...

AI Technical Summary

Problems solved by technology

When the above-mentioned safety passage setting method is applied to long tunnels and extra-long tunnel projects, since there are many air leakage points along the safety passage, it is difficult to maintain positive pressure in the safety passage as a whole, and the pressurized air volume sent from both ends of the safety passage is difficult to act on the central part. area, when a fire breaks out in the middle of the tunnel, the wind speed at the fire door is lower than the specification requirement when people evacuate to the safe passage, which cannot effectively prevent the smoke from invading the safe passage, which poses a safety hazard to the evacuation of personnel

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