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目前我国建设的 RCC坝 ,一般都采用标准的三级配 RCC做坝体、标准二级配 RCC做上游防渗结构 .为了克服两种级配 RCC给施工带来的不便 ,结合百色工程 RCC坝设计 ,提出了全断面采用准三级配 RCC的设想 .所谓准三级配 ,是把标准三级配集料最大粒径由 80 mm改为 60 mm,其它不变 .它具有较好的施工特性、较大的密实度和与三级配相近的热学性能、力学参数更适应设计条件等优点 .
At present, the construction of RCC dam in our country generally uses the standard three-grade RCC dam and the standard two-grade RCC to do the upstream anti-seepage structure.In order to overcome the inconvenience caused by two graded RCCs, Design, put forward the whole section of the quasi-three with the idea of RCC.The so-called quasi-three with the standard three-level aggregate with the largest particle size from 80 mm to 60 mm, the other unchanged.It has better construction Characteristics, greater density and with the thermal properties of the three levels with similar, mechanical parameters to adapt to the design conditions and other advantages.