Abstract：Research purposes ： The reliability theory based on the probability theory is a kind of advanced method for engineering research and design, but limited to the lack of related research, has not been adopted in the current design specifications of railway subgrade retaining in China. So it is necessary to research the retaining structure limit state design method based on probability theory.
Research conclusions :(1) The reliability of the traditional retaining structure design by using the total safety coefficient method is unknown, the effects of the variable uncertainty is not considered, some potential safety risks exist. (2) The research approach to study the limit state design method of retaining structure is to establish a limit state equation, analyze reliability index and determine the partial coefficient of design expression. ( 3 ) Determine the target reliability index and the partial coefficient in limit state design expression according to the different condition. (4) In this paper, the retaining structure limit state design method based on the probability theory can be directly used in the design of railway subgrade retaining structure.
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2014, Vol. 31 
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