软岩堆石料的物理力学性质

Physico-mechanical properties of soft rock materials

本文根据大坳、鱼跳、盘石头和十三陵上池面板堆石坝的软岩堆石料及水布垭风化料的室内及现场试验资料 ,探讨了软岩料的物理力学性质。试验结果表明 :软岩堆石料经过多次降雨、暴晒过程或填筑碾压后 ,岩块发生崩解和破碎 ,级配细化 ;软岩堆石料在最优含水率条件下 ,可达到较高的压实干密度 ;压缩性属低压缩性 ;抗剪强度比硬岩堆石料低。

This paper investigates the physical and mechanical properties based on the data of laboratory and field tests on soft rock materials used in Daao,Yutiao,Panshitou,Shisanling(Upper Reservoir)concrete face rockfill dams and also on the weathered rock of Shuibuya dam.The testing results show that:under the actions of rainfall,sunshine and vibratory roller compaction,the soft rock materials are subject to crumbling,breakage and their gradations also become finer;the soft rock materials at optimum moisture content can achieve a high compacted dry density and low compressibility,but the shear strength is lower than that of hard rock materials;the compacted layers of soft rockfill has less permeability in vertical direction than in horizontal direction.