新场特长公路隧道双洞互补式通风方案设计

新场隧道为特长公路隧道，采用单向坡，左、右线需风量差异明显。针对新场隧道右线通风负荷过大的情况，提出双洞互补式通风方案，即增设横向换气风道，将左、右线隧道形成网络通风系统，利用左线中富余的新鲜风稀释右线中的污染空气，使左、右线隧道内空气质量均满足规范标准。根据新场隧道工程情况，通过方案比选，对双洞互补式通风方案的可行性与合理性进行研究，并对新场隧道双洞互补式通风方案进行设计。结果表明： 新场隧道采用双洞互补式通风方案可以在保证隧道内通风需求的前提下，取消斜竖井以及地下风机房等设施的设置，以较小的初期投资和后期运营管理费用，完善通风系统功能并提高行车舒适性和安全性，具有显著的社会经济效益。

Design of Twin tube Complementary Ventilation Scheme for Xinchang Extra long Highway Tunnel

Xinchang Tunnel is an extra long highway tunnel with a one way slope. The air volume required for the left and right lines is significantly different. Aiming at the situation that the ventilation load on the right line of Xinchang Tunnel is too large, a twin tube complementary ventilation scheme is proposed, that is, a lateral ventilation duct is added to form a network ventilation system for the left and right tunnels, and the polluted air in the right line is diluted by the fresh air in the left line, so that the air quality both in the left and right tunnels can meet the standard. According to the situation of Xinchang Tunnel project, the feasibility and rationality of the twin tube complementary ventilation scheme are studied through scheme comparison. Finally, the twin tube complementary ventilation scheme of Xinchang Tunnel is designed. The results show that： By adopting the twin tube complementary ventilation scheme for Xinchang Tunnel, it can eliminate facilities installation in inclined shaft and underground fan room on the premise of ensuring the ventilation requirement, and realize good ventilation with less expenses for initial investment and later operation and management. The improved ventilation system enhances driving comfort and safety with significant social and economic benefits.