Abstract: To study the influence of water content in fine-grained filling material on continuous compaction control technology for earth-rock dam construction, laboratory model tests were conducted according to the similarity theory, and variations in vibration measurements are studied under different water contents in the filling. Influences of water content variations on the correlation calibration and applicability of the continuous compaction control indexes of different types are examined through linear regression analysis. Results show that: (1) the vibration compaction value (VCV) index is less affected by the water content under the same vibration compaction conditions, but the index Ks is just the opposite; (2) Water content no higher than its optimal value should be ensured when using a compaction meter value (CMV) or compaction control value (CCV) indicator for on-site rolling; (3) When water content falls in the range of 2% around its optimal value, CCV and vibratory control value (VCV) are highly correlated with compaction degree K; (4) Attention should be paid to the influence of water content on the continuous compaction indexes when determining the index of fine-grained filling in rolling compaction of earth-rock dams.

Key words: moisture content of filling, compaction degree, continuous compaction control index, optimum water content