筑坝细粒填料的含水率对连续压实指标的影响

为研究筑坝细粒填料的含水率对土石坝连续压实控制技术的影响，根据相似理论开展了室内模拟试验，研究了振动测值在不同填料含水率下的变化规律。通过线性回归分析，研究了填料含水率变化对相关性校准的影响及与不同类别连续压实控制指标的适用性。结果表明：（1）相同振动压实条件下VCV（vibration compaction value）指标受填料含水率影响较小，但Ks指标正好相反；（2）在现场碾压过程中采用CMV（compaction meter value）和CCV（compaction control value）指标时要保证填料含水率不超过最优含水率；（3）填料含水率在最优含水率变化幅度不大于2%时，CCV和VCV（vibratory control value）指标与压实度K具有强相关性；（4）在土石坝碾压中确定细颗粒填料的连续压实指标时，要重视填料含水率对指标的影响规律。

Influence of water content in fine-grained filling on continuous compaction indexes for dam construction

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.