Program Research and Optimum Design of Tunnel Section for Passenger Dedicated Railway Line

Research purposes: As railway tunnels for passenger dedicated railway line will be built in China for the first time,so there are no mature experiences to learn for type selection and structural design of tunnel section.There are still rooms for improvements to the lining sections of tunnel designed previously for passenger dedicated (railway) lines of(250 km/h) and 350 km/h.Therefore,it is necessary to make research on optimum design of section form and structure of tunnel for passenger dedicated(railway) line in order to meet the requirements for construction of passenger dedicated(railway) line.Research methods:The wide investigation is made on the tunnel design program and construction experience of foreign high-speed railway lines and the comparison and research are made for compressed conditions of tunnel structure,(layout) of drainage system and amount of construction work in some programs.Research results:The lining section forms of tunnel are decided rationally for the passenger dedicated railway lines of(250 km/h) and 350 km/h,and the structural design of tunnel lining has been further optimized.Research conclusions:The defects in previous design made for passenger dedicated railway line have been overcome through making research and doing optimum design of lining section of tunnel for passenger dedicated railway line.After(optimum) design,the compressed situation of lining section of tunnel is more rational,it is more easy to use rescue(passageway) and the amount of construction work can be reduced.