Abstract As the maximum ventilation length of subaqueous highway tunnels in China keeps increasing and the new energy vehicles take an increasingly high proportion, the operational ventilation scheme design for tunnels is faced with new challenges. Given this problem, several research methods including field measurement, data research and theoretical analysis have been used to conclude that the main emission of new energy vehicles is the particulate matter in fume, and the emission load is largely equal to that of the traditional internal combustion engine powered vehicles.With consideration of the field measurement of temperature and odorous gases, it is recommended that the control standard for super-long subaqueous highway tunnel should not be the air change rate. In view of the actual conditions of a super-long subaqueous highway tunnel, the optimized air demand is calculated as 604.71 m3/s, which is 55% less than the original design. For the longitudinal and semi-transverse ventilation systems, 6 ventilation schemes have been compared and analyzed. After comprehensive examination of the factors including the requirements for civil works, the requirements for electromechanical equipment, the advantages and disadvantages of smoke extraction and evacuation, costs of civil works, costs of electromechanical equipment and annual electricity cost in the operation period, it is recommended to use the air supplied semi-transverse ventilation scheme for superlong subaqueous highway tunnels.
Abstract：
As the maximum ventilation length of subaqueous highway tunnels in China keeps increasing and the new energy vehicles take an increasingly high proportion, the operational ventilation scheme design for tunnels is faced with new challenges. Given this problem, several research methods including field measurement, data research and theoretical analysis have been used to conclude that the main emission of new energy vehicles is the particulate matter in fume, and the emission load is largely equal to that of the traditional internal combustion engine powered vehicles.With consideration of the field measurement of temperature and odorous gases, it is recommended that the control standard for super-long subaqueous highway tunnel should not be the air change rate. In view of the actual conditions of a super-long subaqueous highway tunnel, the optimized air demand is calculated as 604.71 m3/s, which is 55% less than the original design. For the longitudinal and semi-transverse ventilation systems, 6 ventilation schemes have been compared and analyzed. After comprehensive examination of the factors including the requirements for civil works, the requirements for electromechanical equipment, the advantages and disadvantages of smoke extraction and evacuation, costs of civil works, costs of electromechanical equipment and annual electricity cost in the operation period, it is recommended to use the air supplied semi-transverse ventilation scheme for superlong subaqueous highway tunnels.
WANG Liang ZHANG Hao
.Study on the Operational Ventilation Scheme for Super-long Subaqueous Highway Tunnel Based on the Composition of New Energy Vehicles[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(1): 67-74
2024, Vol. 61 