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 Manla water conservancy dam is a wide-hearted rockfill dam, impermeable core wall material is graded gravel light loam. By analyzing the physical and mechanical properties of the soil material, the rolling test on site and the results of the system test, it is considered that the soil material has good compactness, high shear strength and low compressibility. Although the soil material has the uneven gravel content, less clay content, poor plasticity, high permeability coefficient and other defects, but as long as the filter design, reasonable to determine the construction parameters to ensure compaction quality, fully able to meet the seepage control Heart wall requirements