乌池坝特长公路隧道通风方案设计

Ventilation design option for Wuchiba super-long highway tunnel

文章简要介绍了乌池坝特长公路隧道的工程概况,对目前最为常用的全射流通风以及斜、竖井加射流风机组合的分段纵向通风方式进行了对比、分析和研究,并充分考虑了正常运营、交通阻塞、火灾和换气四种不同工况下隧道内气流组织、通风及其控制等要求,提出了推荐方案:右线采用斜井集中排出式+竖井送排式+射流风机纵向通风,左线采用斜井集中排出式+射流风机纵向通风。本通风方案采用了一井两用的设计思路,即左线斜井同时对左线隧道和右线隧道进行集中排风;此外,考虑左线入口段火灾时的排烟,从右线竖井处设置了专用排烟通道连接左线。在满足通风要求的基础上,重点研究了通风运营成本及运营安全、火灾排烟及火灾通风控制等关键问题。

The Wuchiba super- long highway tunnel project is introduced briefly. The present most commonly adopted jet ventilation and the partitioned longitudinal ventilation combined with inclined and vertical shafts incorporating jet fans are contrasted, analyzed and studied attentively. The requirements of air flow, ventilation and its control in the tunnel are fully considered under four different working conditions -regular operation, traffic jam, fire and ventilation. The recommended option is： inclined shaft for exhaust, vertical shaft for deliver and exhaust and jet fan for longitudinal ventilation on the right line; inclined shaft for exhaust and jet fan for longitudinal ventilation on the left line. The design idea involves utilizing the inclined shaft on the left line to exhaust the air from both right and left tunnels in the design option. Moreover, considering the exhaust of fire smoke in the entrance of left tunnel, an additional exhaust duct is installed from the vertical shaft of the right tunnel to the left one. Cost for operation ventilation, operation safety, smog exhaust during a fire and its control and other key problems are well addressed.