金沙江塔城水电站大坝黏土心墙掺合料特性研究

金沙江塔城水电站大坝为黏土心墙堆石坝，大坝所用土料多为纯黏土、含少量砾，其强度等物理力学指标不能满足高坝心墙防渗填料的要求，需掺砾提高或改善其物理力学性能。为此，选择代表性料场黏土料与其他各料场的砂砾料按不同的掺合比例，进行重型击实、大型压缩、中型三轴、渗透等试验。结果表明：黏土料在掺砾后其物理力学性能指标发生很大变化，当掺砾比例在60%时，掺后料具有低压缩性和较高的抗剪强度，各项物理力学指标均符合或基本符合规范要求，可以用做大坝心墙防渗料。

Research on characteristics of clay core admixture of Tacheng Hydropower Station on Jinsha River

The dam of Tacheng Hydropower Station is clay core rockfill dam.The local materials mainly contain pure clay and a small amount of gravel,and the physical and mechanical properties such as its strength can not meet the requirements of seepage filler of the high dam,so more gravel is needed to improve the properties.Therefore,different mixing ratios of gravel material in local clay are selected for the tests such as heavy compaction,large-scale compression,medium triaxial compression and infiltration.The res...