From experimental result , i preliminarily know that eps is good thermal insulation material because the absorption of water is low and heat insulation is good , it is practicable at preserving temperature field of frozen earth roadbed and bringing frozen disaster under control ; second , according to the analysis of the eps that is applied into practical project , i have studied the practical effect which eps preserve roadbed temperature field , and the influence that was made after building field . i have get that eps can influence moisture content and frozen upper limit , through practical measuring data , i have studied freezing and expanding quantity and melting and submerging quantity during a complete frozen and melting cycle as well as have expanded and proved the practical application effect of eps with some reference significance to deep research of some connected problems . finally , through computer data analysis , setting up the analytical model of finite unit , i have simulated the temperature field of roadbed heat preservation , then expounded and proved that the height of embankment influenced the effect of thermal insulation material 其一是对聚苯乙烯泡沫塑料( eps )保温板以及天然路基土层、路堤填料进行了室内试验分析，结合国内外现在的有关科研成果，综合确定其各项特征参数；从试验结果初步认识到聚苯乙烯泡沫塑料是一种吸水率低，隔热性好的保温材料，在冻土路基温度场的保护和冻害治理方面是可行的；其二通过eps保温板在现场工程实践中的应用分析，研究了保温板在保护路基土层温度场的实际效果以及修筑路堤后造成的影响，保温板对土体含水量、冻结上限的影响，通过实测资料，研究了在一个完整的冻融周期内整个路基的冻胀量和融沉变形量，论证了保温板的实际应用效果，对有关问题的进一步研究和相关工程设计具有参考意义；其三，通过计算机数值分析，建立有限元分析模型，对保温路基的温度场进行了模拟计算，论证了路堤高度对保温材料效果的影响。
