Abstract: Based on frost heave and frost boil disease mechanism analyses of embankment in permafrost regions, a new synthetical embankment with permeable geotextile, block stone interlayer and waterproof geotextile is proposed, whose anti-frost heave and boil effect is investigated by a model test. The results show that, compared with common embankment, the new synthetical anti-frost heave and boil embankment can decrease its temperature and have good cooling effect whether the air temperature is high or not. Moreover, it can decrease water content effectively; and the decrease ratio of water content is increasing with period increasing. These properties are advantageous to prevent frost heave and boil diseases from occurring and developing. What’s more, the new synthetical anti-frost heave and boil embankment is easily constructed and its cost is also low. Therefore, it has extensive application prospects.

Key words: permafrost region, embankment, frost heave, frost boil, new synthetical embankment