Method for evaluating smoke-blocking and heat-insulating effects of tunnel fire water curtain

Abstract

The invention relates to a method for evaluating the smoke-blocking and heat-insulating effects of a tunnel fire water curtain. The method comprises the following steps: determining effective indexesof the smoke-blocking and heat-insulating effects of the water curtain and effective indexes of tunnel safety evacuation through theoretical analysis; determining the size of the tunnel model, a firescene and basic setting parameters of the water curtain according to the effective indexes of the water curtain smoke-blocking and heat-insulating effect and the effective indexes of tunnel safety evacuation; in the geometric model, numerical values of tunnel safety evacuation effective indexes before and after the water curtain is opened are obtained through numerical simulation, and according tothe numerical values of the tunnel safety evacuation effective indexes, water curtain smoke blocking and heat insulation effect effective indexes are calculated; with the water spraying intensity andthe momentum ratio in the effective indexes of the water curtain smoke-blocking and heat-insulating effect as variables, the influence of the water spraying intensity and the momentum ratio on the water curtain smoke-blocking and heat-insulating effect is simulated and analyzed; and establishing a water curtain smoke-blocking and heat-insulating effect evaluation system according to the analysisresult. The method has the beneficial effects that a set of effective evaluation method is provided for the smoke-blocking and heat-insulating effects of the tunnel water curtain, so that reference isprovided for tunnel fire-fighting design.

Description

technical field [0001] The invention relates to the technical field of tunnel fire smoke control, in particular to an evaluation method for the effect of water curtain smoke shielding and heat insulation in tunnel fire. Background technique [0002] In recent years, as a "soft partition" that can block smoke, fire, and clean poisonous gas, the water curtain allows trapped people to easily evacuate through the water curtain. Based on its many advantages, it is being used more and more in the tunnel. But so far, there has not been a qualitative and quantitative evaluation method to reflect the effect of water curtain smoke and heat insulation, such as smoke blocking efficiency, heat insulation efficiency, effective smoke and heat insulation momentum ratio, etc.; at the same time, the water curtain in the tunnel The application in fire is lacking the guidance of current standards and regulations, and needs to be guided by practical and relevant parameters, so as to provide ref...

AI Technical Summary

Problems solved by technology

But so far, there is no qualitative and quantitative evaluation method to reflect the effect of water curtain smoke shielding and heat insulation, such as smoke shielding efficiency, heat insulation efficiency, effective smoke shielding heat insulation momentum ratio, etc.; at the same time, the water curtain in the tunnel The application in fire is lacking the guidance of current standards and regulations, and needs to be guided by practical and relevant parameters, so as to provide reference for fire protection design of underground roads

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