水利水电工程粗颗粒土相对密度试验与应用研究

Experimental and Applied Research on Relative Density of Coarse-grained Soil in Hydropower Engineering

相对密度是控制堆石坝碾压质量的一种指标,为此黄河积石峡水电站面板堆石坝工程对砂石料的填筑进行相对密度试验,由于坝料碾压结果受到含水率的因素影响较大,通过大量的试验,对特殊垫层料和垫层料采用＂干法＂和采用＂湿法＂试验的结果进行对比试验分析,最终确定应根据实际工程施工情况,相对密度采用＂湿法＂试验结果作为质量控制标准。

The relative density is an indication to control the rolling quality of rock-fill dams,so the relative density tests are made for the sand and gravel filling materials in the works of Jishixia Hydropower Station in Yellow River.As the compacted result of dam materials is affected by moisture content factor greatly,the results from the ＂dry＂ and ＂wet＂ test for the special bedding material and cushion material are compared and analyzed here throught a large number of tests.At last,it is defined that the ＂wet＂ test results should be used as the quality control standards according to the actual engineering situations.