建设中的龙潭隧道系沪蓉国道主干线宜昌至恩施公路上的特长隧道，长约2×8.7km，其营运通风系统值得认真研究。结合工程实际情况，从通风、防灾救援和施工组织等因素综合考虑，经技术经济比选，确定了技术相对可靠、经济较省的营运通风方式。

Longtan tunnel under construction is a superlong highway tunnel of about 2×8.7km length on Yichang～Enshi section of the national highway from Shanghai to Chengdu. The operation ventilation system of Longtan tunnel requires careful researches. On basis of the actual conditions of the tunnel, a technicallyreliable and costeffective operation ventilation option is determined for the tunnel by means of technic and economic comparisons in terms of ventilation efficiency, disaster prevention, emergency rescue and construction convenience.