In order to reduce the destruction of pavement resulted by frost heaving in seasonal frost region, anti-frost design method was studied. Through the analysis of highway frost depth and coherent meteorological data, the highway frost region division of secondary zoning was put forward according to the freezing index and humidity coefficient. Based on the research results at home and abroad, the modified formulas for calculation of earth frost depth and highway frost depth were also suggested. In addition, according to stress state of pavement subjected to frost action in subgrade soil, the calculation formula and design method for pavement anti-frost damage were brought forward. Results show that highway frost region division makes the aim of the highway anti-frost design clear. The application of the modified method which is used to calculate highway frost depth and anti-frost design method for pavement makes anti-frost design more exact. It can effectively reduce the frost heaving damage in the pavement.
Key words
road engineering /
seasonal frozen earth /
regression analysis /
anti-frost design for pavement /
secondary zoning /
standard frost depth
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