CAJ | 학술논문

扬州瘦西湖隧道为穿过国家5A 级风景名胜区的单管双层隧道，为了解决洞口环保问题，采用 SES 对隧道内通风量和污染物浓度进行了模拟计算，结合洞口污染物扩散范围和环境敏感点分布情况，确定了上下层隧道均采用竖井排出式的纵向通风方式；针对烟气沉降速度快的特点，优化了横断面布置，在盾构段和部分明挖段设置排烟道，采用重点排烟的方式，人员安全可用疏散时间提高了1倍，并且在疏散楼梯间采用了上下层分别设置加压送风机的方式，确保了烟气不会进入非事故隧道，极大地提高了人员的安全性。
양주수서호수도위천과국가5A 급풍경명성구적단관쌍층수도，위료해결동구배보문제，채용 SES 대수도내통풍량화오염물농도진행료모의계산，결합동구오염물확산범위화배경민감점분포정황，학정료상하층수도균채용수정배출식적종향통풍방식；침대연기침강속도쾌적특점，우화료횡단면포치，재순구단화부분명알단설치배연도，채용중점배연적방식，인원안전가용소산시간제고료1배，병차재소산루제간채용료상하층분별설치가압송풍궤적방식，학보료연기불회진입비사고수도，겁대지제고료인원적안전성。
Shouxihu tunnel in Yangzhou,which crosses underneath the Grade 5A scenic area,is a single-bore double-deck tunnel.In the paper,SES is applied to simulate the ventilation air volume and pollutant concentration inside the tunnel,so as to protect the environment near the tunnel portals.Longitudinal ventilation is determined to be applied for both the upper tunnel tube and the lower tunnel tube,considering the range of the pollutant dispersion and the environmental sensitive points near the tunnel portals.The layout of the cross-section of the tunnel is optimized and smoke passages are arranged in the shield-bored tunnel section and part of the cut-and-cover tunnel section,considering the fast sediment of the smokes.The key smoke exhaust mode adopted doubles the available safe evacuation time. Forced draught blowers are applied to the emergency staircases of the upper tunnel tube and the lower tunnel tube respectively,which ensures that no smoke can enter the non-accident tunnel tube and in turn improves the safety of the passengers significantly.