山地城市轨道交通隧道通风系统设计重难点分析

Analysis of key and diffi cult points in design of ventilation system for mountainous urban rail transit tunnels

通过对重庆市轨道交通环线隧道通风系统的设计研究,结合山地城市地形地域的特征,综合分析轨道交通制式区间隧道通风系统的设计重难点。针对深埋地下车站隧道风机房布置、大断面暗挖区间通风量计算、地面及高架车站与隧道区间结合部位处理、隧道通风及烟控模式等问题进行梳理,归纳总结了山地城市轨道交通区间隧道通风系统的优化方案。

Based on the design and research of ventilation system for the ring road tunnel of Chongqing rail transit,and based on the characteristics of mountainous urban terrain,this paper comprehensively analyzes the key and diffi cult points in the design of ventilation system for metrotype tunnel,and puts forward the layout of ventilation machine room for deep-buried underground station tunnel,the calculation of ventilation volume for large profile undercut tunnel,the measures at the meeting positions between surface traffi c,elevated station and tunnel section,as well as tunnel ventilation.The problems of tunnel ventilation and smoke control mode are sorted out,and it summarizes the optimal scheme of tunnel ventilation in mountainous urban rail transit section.