目前砾石土被广泛地用作高土石坝的防渗体，国内已建成的139.8m的某水电站堆石坝就是用它作心墙的防渗材料。结合某水电站工程料场砾石土的室内试验，分析了土料的颗粒级配、比重、液塑限、塑性指数、最大干密度、最优含水率及渗透系数的相互影响关系，试验结果证明该料场砾石土料渗透性稳定，满足高土石坝心墙的标准。%Gravelly soil has been widely used as impervious material in high earth-rock dam in recent years. Taking the 139.8m high a hydropower rockfill dam for example, the seepage stability experiment in the core wall material is described. Combined with gravel soil of a hydropower station's Material field of laboratory test, this paper analyzes the interactional relationship of grain composition, specific gravity, liquid and plastic limit, plasticity index, maximum dry density, optimum moisture content and permeability coefficient, the experiment results show that the permeability of gravel soil is stability and the experiment results meet the standards of high earth-rockfill dam core wall.
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