Study on ventilation scheme of Wuhan East Lake tunnel

The length of Wuhan East Lake tunnel is 6 522 m, the longest city lake tunnel at present. The tunnel is located in the national 5A scenic area, which requires high on the pleasant air quality and landscape. The design of ventilation system is a difficult point of the project. Given the line direction, as well as the surrounding environmental conditions of the entrance to the tunnel, studies three types of typical ventilation schemes of three-section shaft ventilation, natural ventilation with longitudinal ventilation and natural ventilation with segment longitudinal ventilation and vertical shafts. Simulates the natural ventilation and air volume by the SES software. Recommends the scheme of natural ventilation with segment longitudinal ventilation and vertical shafts by economic and technical comparison from the perspectives of the tunnel pollutant discharge, the initial investment, the operation cost, the environmental protection and the landscape.