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Abstract Taking Humaling tunnel in Lanzhou—Chongqing railway as project background，contact pressure between the primary lining and secondary lining of large-section loess tunnel was acquired by means of in-situ monitoring；development law over time and spatial distribution along the tunnel ring of the contact pressure were discussed. Loads on the secondary lining were calculated according to code for design on tunnel of railway. Internal force of the secondary lining under calculation loads and monitoring loads was solved individually by load-structure model；and a comparative analysis was conducted. The study method and conclusions can provide references to analyze the mechanical characters of lining in soft ground and establish a scientific and reasonable design method of tunnel.
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Received: 24 February 2010
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