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| Program Research and Optimum Design of Tunnel Section for Passenger Dedicated Railway Line |
| JIANG Sheng-lin |
| The Fourth Survey & Design Institute of China Railway, Wuhan, Hubei 430063, China |
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Abstract 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.
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Received: 10 July 2006
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2006, Vol. 23 
