砂砾石筑坝压实质量控制指标确定方法探讨

鉴于室内确定砂砾石最大密度试验在能量输入的方式、量值差异和缩尺效应的影响,与现场实测最大密度不一致,造成填筑指标评定的失真,本文建议基于筑坝现场碾压试验资料推求粗粒料干密度极值,评价体系具有归一性,与实际工况相符。

Discussion on method for determination of compaction quality control index for dam construction with sand-gravel

Due to the mode of energy input，the discrepancy in values of quantities and the impact from scale effect of the lab-test for determining the maximum dry density of sand-gravel are not coincide with those measured in situ，and then some distortions during assessing the filling indexes are to be caused. Therefore，it is suggested herein that the extreme values of the dry density of those coarse-grained materials are to be calculated based on the data of the in situ compaction test made at the site of dam construction，so as to make the assessment system to have an unitarity and coincide with the actual construction condition concerned.