Study On The Influence Of Assistant Gallery On Transient Pressure In Long Length Single-track Tuinnel On 160～200km/h Passenger Dedicated Line

The fact that lots of long length tunnels will be constructed on the passenger dedicated line is inevitable because our country is mountainous,Now the construction method which called "muti-face excavation" is widely used with the characteristic of adding working faces by building assistant galleries.Thus the influences of opening or shut and the design parameters of assistant galleries on transient pressure which determines passenger’s comfort in long length tunnels locating on the passenger dedicated line turn into a problem need to be studied urgently.The paper works on the influence of the three parameters including position,length and cross section area of assistant gallery in long length single-track tunnel on 160～200km/h passenger dedicated line by utilizing the following means such as investigation,model trial and numerical simulation,and some setting principles at the aspect of transient pressure for the assistant galleries in a long length single-track tunnel on 160～200km/h passenger dedicated line were obtained.