COMPREHENSIVE SURVEY RESEARCH ON HARMFUL GAS IN A TUNNEL OF HUYURONG HIGH SPEED RAILWAY
Combines comprehensive survey methods such as data collection,geological mapping,geophysical prospecting,geological drilling and harmful gas testing in boreholes to identify the origin,type,distribution characteristics,and content of harmful gases in a tunnel in the Dabie Mountain area of the Huyurong high speed railway.It is pointed out that the maximum concentration of carbon monoxide in the tunnel exceeded the limit in specifications,although other harmful gases do not exceed the limit,attention should also be paid to them.The causes,migration,and storage mechanisms of harmful gases are analyzed,the hazard levels of each harmful gas is classified,it can provide reference for the survey of new tunnel projects in this area.
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