基于多竖井送排模式的隧道通风系统设计与创新

浙江省近年来出现了4座长度超过6km的特长公路隧道,为了解决正常营运通风和火灾应急排烟的问题,同时兼顾经济节能,采用了多竖井送排通风模式.设计考虑了正常交通、阻滞、火灾等工况,其中火灾工况根据火灾释热量计算来确定排烟临界风速,通风区段划分和通风设备的配置规模综合考虑了需风量计算结果及工程类比.在设计过程中开发了多竖井送排式通风的算法程序,创新了双洞共用的通风竖井和地下风机房布置模式.

Design and Innovation of Road Tunnel Ventilation System Based on Multi-shaft Blow and Exhaust Mode

In recent years there has been four 6km longer highway tunnels in Zhejiang Province.In order to provide operation ventilation and emergency smoke exhaust functions,the energy-saving multi-shaft ventilation model is used.Several cases including the normal traffic,block,fire smoke are considered.The critical wind velocity is calculated according to heat release value.The ventilation section division and ventilation equipment are determined according to air demand and engineering analogy.What’s more,a multi-shaft ventilation algorithm and an underground ventilation station and shaft layout shared by double tunnels are researched in the progress of designing.