海底公路隧道纵向疏散模式研究

Study on the longitudinal evacuation of undersea road tunnel

通过分析国内外常用的水下隧道疏散模式,结合某海底隧道盾构段的地质结构特点,指出该隧道海底盾构段应采用纵向疏散模式。提出了逃生通道具体设计要求,包括通道的加压送风方式、风速、余压值等。通过STEPS数值模拟软件,对比分析不同间距对于人员疏散的影响,确定逃生口最佳设置间距为80m。

Through the analysis of underwater evacuation model commonly used at home and abroad, based on the geologic structure characteristics of the shleld section of an undersea tunnel, it was concluded that the longitudinal evacuation mode should be adopted on the tunnel. Then the specific design re- quirements of the escape routes had been proposed, including the supply way of pressurized air, wind velocity and pressure value, etc. The atria of evacuation staircase and the forced draft of atria were suggested. The conclusion that the best exits spacing is 80 m was obtained by taking the effects of different spacing for evacuation into account, through the numerical sim- ulation software STEPS.