满拉水利枢纽心墙砾质轻壤土工程特性研究

满拉水利枢纽大坝为宽心墙堆石坝 ,防渗心墙土料为宽级配砾质轻壤土。通过对土料的室内物理力学性质试验、现场碾压试验和系统试验成果分析 ,认为该土料具有较好的密实度 ,较高的抗剪强度和低压缩性。土料虽然具有含砾量不均 ,粘粒含量偏少 ,塑性较差 ,渗透系数偏大等缺陷 ,但只要作好反滤设计 ,合理确定施工参数 ,保证压实质量 ,完全可以满足防渗心墙的要求

Study on core wall gravelly light loam engineering character in Manla water complex

The dam of Manla water complex is rock-fill dam with wide central core. The earth material of the central core for water retaining is wide graded gravelly light loam. The field experiment shows that it has higher degree of compactness and resistance to shear, as well as with lower compressibility. Although the sand carrying capacity is inhomogeneous, clay content is poor, the plasticity is smaller and coefficient of percolation of percolation is bigger for the earth material, but as long as the filter design is perfected, the construction parameters are reasonably fixed on and the compacting effect is ensure, it can meet the needs of central core for water retaining.