Study on Urban Tunnel CO Control Criteria Based on Human Capacity

Abstract

Carbon monoxide has a significant impact on human health, and a special attention should be given in the tunnel management. But the existing tunnel design standard about carbon monoxide concentration is mainly for rural highway especially for expressway, there is no urban road tunnel carbon monoxide concentration control criteria promulgated in China up to now. By analyze the character of human blood carboxy hemoglobin concentration which expose in different environment concentration of carbon monoxide according to a certain time, and take carboxyhaemoglobin that accounts for 2.0 percent in the hemoglobin as the carbon monoxide concentration control threshold for the model development to establish the basis for carbon monoxide concentration of both pedestrian and vehicle mixed tunnel and vehicle only tunnel with different lengths, put forwards the length limit of pedestrian and vehicle mixed tunnel and the recommend criteria for carbon monoxide concentration control of urban tunnels. The result of the study can has a support for urban tunnels design and management decision making especially in ventilation.