Research on Ventilation Scheme of Daliangshan No.1 Extra-long Highway Tunnel
A through parallel pilot tunnel and an inclined shaft are set up in Daliangshan No.1 tunnel on Lexi Expressway.In order to explore the feasibility and economy of parallel pilot tunnel used for operation ventilation,this paper first analyzes the function of parallel pilot tunnel,and it is known that the parallel pilot tunnel used for operation ventilation will not conflict with the original function.Then,by adjusting the distribution of the ventilation function of the inclined shaft and the parallel pilot tunnel,a variety of ventilation schemes using the parallel pilot tunnel are proposed.Finally,the ventilation calculation is carried out,and the advantages and disadvantages of each scheme are compared from many aspects.It is concluded that the parallel pilot tunnel used for ventilation can reduce the comprehensive cost to a certain extent,but the engineering difficulty and the difficulty of rescue and evacuation organization are high.
long and large highway tunnelparallel pilot tunnelinclined shaftoperation ventilation