Experimental Research On Tunnel Fire Temperature Distribution In High-speed Wind And Automatic Fire Alarm System

Frequent occurrence of fire accidents also makes it increasingly concerned about the fire safety of the tunnel, and the tunnel fire kept fears hinder a positive use of the tunnel. In addition, fire alarming, rescue difficulty also hindered the development of tunneling technology, making the long tunnel scheme due to fire safety issues difficult. The sum of these countries on the basis of lessons fires, organize a large force on the characteristics of tunnel fires and fire prevention and rescue for a more systematic study. Tunnel fire detection and alarm system is performed in real time for the long tunnel of fire detection and alarm signal is generated to notify the management department in a timely manner to prevent or reduce fire damage to personnel and vehicles to prevent subsequent fires continue to enter the vehicle without the knowledge of the tunnel, expanding the damage accident.This paper introduces Highway tunnel fire alarm system installation and construction and acceptance: Because it is in the wild, complex environmental conditions, poor construction and maintenance of highway tunnel automatic fire alarm system is a very important part of the normal work effectively with automatic fire alarm system significance. According to the design of tunnel fire tunnel fire alarm performance appraisal, tunnel fire alarm fire tunnel users implement the primary technical aspects of self-rescue. The unreasonable design fire or the proportion of small size of fire scenario design can provide scientific basis for the test conditions the performance evaluation of tunnel fire alarm in the early, often there is a great difference between the simulations of computer based on CFD. The project design of tunnel fire scenario entity based on the initial stage of the three lane tunnel entity, a small car, the limited space of fire(HRR design 40 s, design of growth time of peak 0.8MW, limited space for each dimension diffusion is 50%) as the test fire, natural wind-5m/s full face wind speed conditions, 6 test fire a total of 24 different test fire conditions for linear optical fiber temperature sensing fire detector and the other with the performance evaluation of fire detector and provides a unified and comprehensive factors based on real fire scene. Fire alarm control fast identification and location adaptive correction technique of temperature field based on the alignment of information fusion and the implementation of distributed data mining field linear temperature, the development of fire recognition algorithm model can capture the characteristics of temperature variation in the early fire in tunnel at high wind speed conditions, fast and reliable, the development of positioning and rectifying algorithm model can automatically adapt to the tunnel ventilation speed and position parameters are correct, developed the corresponding software modules.