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Abstract.

Rigid Extruded Polystyrene Foam Board is a kind of thermal insulation material with good effects when applied in frost heaving prevention of canal lining in the north China. In this paper, the type of Rigid Extruded Polystyrene Foam Board thermal insulation cushion lining suitable for northern Shanxi, China was proposed based on experimental studies on six different channel lining methods. According to the analysis of performance test on Rigid Extruded Polystyrene Foam Board having been used for 27 years in northern Shanxi, majority of performance indicators decreased along with the increase of running time of the project, in which the critical coefficient of heat conductivity rose by over 60%. Therefore, with respect to the practical application design and construction of Rigid Extruded Polystyrene Foam Board for frost heaving prevention of channel lining, the impacts of time and natural state should be taken into account, and for the selected material performance indicators, the impacts exerted by the performance decrease degree should be considered as far as possible.