Abstract: Real-time compaction monitoring has become a technology for effective control on the compaction quality of rockfill dams. However, various types of materials are used in construction of concrete face rockfill dams (CFRD) and they are significantly different in composition and construction technology. Therefore, comprehensive studies are needed of the impact of different construction technologies on compaction monitoring indicators and their applicability to different dam zones. Combining with field rolling tests, we analyzes the influence of rolling direction, roller vibration mode and dam material type on compaction indexes. The result shows that the rolling vibration frequency is the major factor, and that compaction control value (CCV), an index that describes the effect of more harmonic components of roller acceleration, is better adaptable to different CFRD materials. Based on the above analysis, we recommend the method of CCV coupled with its frequency for evaluation and real-time control of the compaction quality of different CFRD materials.

Key words: concrete face rockfill dam, compaction quality, real-time monitoring index, applicability analysis