Research on the Key Technology of Comprehensive Prevention and Control of Heat Damage During the Construction of High Ground Temperature Tunnels
In order to solve the problem of a high ground temperature working environment during the construction of high ground temperature tunnels and to improve the comfort and productivity of construction personnel,this paper takes the Huama Tunnel of the Lanzhou-Chongqing Railway as the object of study.Through the combination of on-site monitoring,numerical simulation,and on-site practice,it studies and analyzes the formation of high ground temperature tunnels and the impacts of construction,conducts a relevant study on the prevention and control technology of thermal hazards,and determines the optimal thickness of the tunnel thermal insulation layer of 50 mm.The cooling technology of'double ventilation pipe ventilation+ice cooling on tunnel surface' is adopted,which is well applied in the field.The temperature inside the tunnel meets the construction requirements to ensure the safety and efficiency of high geothermal tunnel construction.The results of the study can provide a basis for the design and construction of ventilation and thermal insulation for high ground temperature tunnels.
high ground temperature tunnelheat damagethermal insulation layerice coolingventilation
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