RESEARCH ON APPLICATION OF IMPACT COMPACTION TECHNOLOGY TO HIGH EMBANKMENT OF HIGHWAY

Based on the application and practice using impact roller to a high embankment of highway,which is filled by soil-rock foundation packing material with high content of stone(60%–70%),an impact compaction technology for high embankment is developed.During the process of compaction,the parameters of the filling including dry density and void ratio,settlement patterns of embankment and the depth of the impact compaction are studied.The specificities of the soil-rock foundation packing material and the quality index system for evaluating the soil-rock material have been expounded;and the working characteristics and the compaction action mechanism of the soil-rock material under roller compaction have also been analyzed.It is indicated by the results of the experiment that the quality of the embankment increases with the impact compaction,and the post-construction settlement decreases as a result of the compression settlement of embankment.