Performance quantification method of tunnel fluid smoke barrier with concentrated longitudinal ventilation

Abstract

The present invention provides the tunnel fluid smoke retaining wall performance quantification method that longitudinal ventilation concentrates, it is characterized in that, comprises the following steps: Step 1): be used for measuring the establishment of fluid smoke retaining wall performance-Euler number Euler number, Euler number is etc. The ratio of the effective pressure to the inertial force, namely: N, the combined power consumption of the fan, that is, the arithmetic sum of the power consumption of each single machine under a specific combination, the unit is W; H SP , the static pressure of the non-smoke pollution channel, unit Pa; Q RC , the air volume of the compressed airflow without smoke pollution, unit m 3 / s; 0.5 is a constant based on the principle of fluid dynamics, a dimensionless natural number; ρ, airflow density, unit kg / m 3 ; v RC , the wind speed of no smoke pollution channel, unit m / s; Q p , the sum of the air volume of the pressurized airflow, unit m 3 / s. The method for quantifying the performance of the tunnel fluid smoke retaining wall with concentrated longitudinal ventilation of the present invention can accurately and clearly quantify the ventilation and smoke exhaust system and its efficiency in a numerical manner.

Description

technical field [0001] The invention relates to the technical field of tunnel smoke exhaust, in particular to a method for quantifying the performance of a tunnel fluid smoke retaining wall with concentrated longitudinal ventilation. Background technique [0002] In recent years, with the development of social economy, urban ground traffic has become more and more congested. In order to meet the travel demand and relieve the pressure of ground traffic, my country's underground transportation business has developed rapidly. While it brings convenience, many problems that cannot be ignored have emerged one by one; and the problem of underwater tunnel fires is the most prominent. According to statistics, 85% of the victims died of inhalation of high temperature and toxic fumes. Therefore, ventilation and exhaust methods, exhaust effects and fan combinations are still frontier issues in the industry. [0003] At present, the ventilation methods commonly used in tunnels include...

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Problems solved by technology

[0004] The underwater interval tunnel is different from ordinary tunnels. If longitudinal ventilation and smoke exhaust are considered, the geographical conditions make it difficult to arrange shafts. In addition, the effect of horizontal and semi-horizontal ventilation and smoke exhaust is excellent. However, the project cost is too high and construction management is difficult.

Naturally, the longitudinal ventilation centralized smoke exhaust method has gradually become the preferred ventilation and smoke exhaust method for underwater tunnels; however, the quantitative method for the performance of the fluid smoke barrier in the longitudinal ventilation centralized smoke exhaust method has not yet been formed, and it is impossible to predict a reasonable fan. Combined arrangement and ventilation effect

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