【摘要】 对多项工程砾质土防渗材料的大量室内外试验成果进行了分析研究，得出结论：当击后（ 或压后） 砾石（ ＞ ５ ｍｍ） 含量及＜ ０－０７４ ｍｍ 细粒含量控制在某一界限范围时，砾质土的渗透系数就能满足防渗要求，其击后干密度大小与土料母岩性质、风化程度关系密切；并提出了砾质土最大干密度经验公式的建议。更多还原

【Abstract】 The study on gravelly soil as impermeable material shows that the seepage coefficient of gravelly soil fully satisfies the requirements of earth dam when the contents of gravel(>5 mm)and fine grain (<0 074 mm)after compaction are limited within a critical value,and that their dry densities are fully influ enced by their parent rock properties and weathered degree In addition,an empirical formula for maximum dry density of gravelly soil is put forward更多还原