Exploration on Traffic Comfortableness and Safety in Railway Tunnel of Passenger Dedicated Railway Line and Engineering Measures for Them

Research purposes: The total length of tunnel to be built on passenger dedicated line in China will exceed 1 000 km according to Medium and Long-term Railway Net Plan.The research and exploration are made in this paper on the relevant technical measures for construction of railway tunnel of passenger dedicated line based on the goal of building tunnel of passenger dedicated line with safety,high quality and efficiency.Research methods:The analysis is made for the engineering and structural features of railway tunnel of passenger dedicated line from the cut-over points of meeting requirements for comfortableness and safety of high-speed train running in the tunnel of passenger dedicated line.The concrete measures for construction of railway tunnel of passenger dedicated line are presented in the areas of relaxing effect of aerodynamics,guaranteeing durability of tunnel structure and construction safety of big sectional tunnel.Research results:The tunnel of passenger dedicated line has obvious engineering and structural features compared with normal-speed railway tunnel.The engineering measure should be summed up and improved in construction,and formed into one with its own technical characteristics based on learning previous engineering experiences.Research conclusions:These are key technical points for better construction of railway tunnel of passenger dedicated line: to set up rational section and structural form of tunnel,reinfoce the inverted arch at bottom of tunnel and structural form of tunnel,reinforce the inverted arch at bottom of tunnel and concrete-filling structure,guarantee the structure durability of composite lining tunnel and make it suited to the engineering feature of big sectional tunnel,and persist in the principle of informationalized construction.