A method for judging applicability of a circulating ventilation system of an extra-long highway tunnel
A technology for circulating ventilation and highway tunnels, which is used in mine/tunnel ventilation, special data processing applications, and earth-moving drilling, etc. It can solve urban planning constraints, unclear application conditions for controllable circulating ventilation in extra-long highway tunnels, and ventilation in extra-long tunnels. high cost problem
Active Publication Date: 2018-12-14
HUNAN UNIV OF SCI & TECH
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Problems solved by technology
However, the high cost of ventilation for extra-long tunnels and the location of shaft excavation are restricted by geology and urban planning are still prominent, and the applicable conditions for controlled circulation ventilation in extra-long highway tunnels are not clear
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[0043] The present invention will be further described below in conjunction with the accompanying drawings.
[0044] like figure 1 and figure 2 As shown, the controllable circulation ventilation system of the super-long highway tunnel includes the air introduction section 3 of the circulation air duct, the air circulation duct 5, the injection section 7 of the circulation air duct, and the adjustable auxiliary structure 0; the adjustable auxiliary structure 0 includes or does not include the The exhaust shaft and the air supply shaft connected by the air duct 5 (not shown in the figure). The circulating air duct 5 is arranged on the top of the tunnel, and the two ends of the circulating air duct 5 communicate with the tunnel through the circulating air duct air introduction section 3 and the circulating air duct ejection section 7 respectively, and the circulating air duct air introduction section 3 is close to the entrance of the tunnel 1 setting, the circulating air duct ...
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The invention discloses a method for judging the applicability of a circulating ventilation system of an extra-long highway tunnel, which comprises the following steps: 1) calculating the air quantityrequired for diluting smoke and dust and CO; 2) calculating the environment ratio X; 3) calculating the longitudinal slope ratio Y; 4) calculating the diesel-steam ratio Z; 5) calculating the air demand ratio W; 6) calculating the critical diesel / steam ratio (shown in the description); 7) determining the influence degree of environment ratio, longitudinal slope ratio, diesel-steam ratio, air demand ratio and critical diesel-steam ratio on the controllable circulating ventilation, and making judgment on the applicability of the circulating ventilation system. The invention is used for optimizing ventilation system of extra-long highway tunnel, can avoid tedious calculation of dimensional parameters such as tunnel length, section size and the like, and realizes rapid and quick pre-evaluation of controllable circulating ventilation.
Description
technical field [0001] The invention belongs to the technical field of disaster prevention and reduction in tunnels, and in particular relates to a method for judging the applicability of a circulating ventilation system in an extra-long highway tunnel. Background technique [0002] Highway tunnels are long and narrow spaces that are semi-submerged or shallowly buried. The treatment of pollutants such as smoke and dust generated by cars driving in tunnels has always been an important issue of concern to the industry. Generally, mechanical ventilation is used to dilute pollutants such as smoke and CO, and the dirty air is discharged to the environment outside the tunnel, which belongs to the straight-through system scheme. The ventilation system of long-distance or extra-long-distance road tunnels must cooperate with ventilation shafts to meet the wind demand in the tunnel. Ventilation for extra-long tunnels specifically involves the optimization of shaft excavation, ventila...
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Login to View More IPC IPC(8): G06F17/50E21F1/00
CPCE21F1/00G06F30/20
Inventor 陈世强田峰陈永平王海桥郝小礼
Owner HUNAN UNIV OF SCI & TECH