Construction Technology of Large Thickness Vibratory Compaction of Hard Rock Embankment

Abstract

In order to provide technical guidance for the construction of rock embankment with a thickness greater than 60 cm, thehigh-power roller with self-weight of 32tand supporting construction machinery have been used to carryoutfield experimentson vibration compaction of large thickness rock embankment, and several indexes of compaction quality have been comparedand evaluated, so the quality detection method and evaluation criteria of large thickness vibration compaction of rockembankment have beenobtained.The results showsthatforthe vibration compaction of the hard rock embankment with large thickness, the effective rolling thickness of the high-power vibratory roller with 32tweight is 90cm.It is suggested that the comprehensive parameters such as loosenesscoefficient, settlement difference and construction technology should be adopted toevaluatingcompaction quality. The standard of compacting quality is: the loosenesscoefficient should be greater than 1.16, the average settlement difference of the last rolling should not exceed 5mm, and the high-power roller should roll more than 6 times.