The Informatization Construction of Fenghuoshan Tunnel in Permafrost

1BriefIntroductionoftheProject LocatedinKekexilidepopulatedzone,350kmtoGolmudcityofQinghaiProvince,Fenghuoshan TunnelofQinghai TibetRailwayis1338mlong,withatrackelevationof4905mabovethesealevel.It’sthehighesttunnelintheworld.Fenghuoshanregionhasformidablenaturalconditions,witharcticalpineclimate,deficient oxygen,andvulnerableenvironment.It’ssurroundedbyhillswithseverepartialundulation.Ithastypicalaltitudeiceandsnowclimate,whichchangesconstantly.Theregioniscalledtheforbiddenareaforlives…

The Informatization Construction of Fenghuoshan Tunnel in Permafrost

Based on the characteristics of tunnels in permafrost, we established an integrated infromatization management system for the construction of the Fenghuoshan Tunnel Qinghai-Tibot Railway. In addition to information collection items of generic tunnels, our emphases were placed on the monitoring of the work face temperature, environment temperature, surrounding rock temperature, frost heave force on lining, water pressure on lining and rock bolt force. According to the work face and environment temperatures during construction, we regulated and controlled the ventilation temperature in time to guarantee the stabilization of the work face and the construction quality of concrete. According to the changes in surrounding rock temperatures, water pressure and frost heave force on the lining, we could estimate the effectiveness of waterproof and temperature preservation systems. According to the changes in frost heave force on lining and rock bolt force, we could estimate the mechanical effectiveness of support system.