堆石料室内大型压缩试验研究

Research on Large Scale Compression Testing of Rockfill Materials in the Laboratory

按风干和饱和两种状态,不同初始孔隙比制样,进行室内压缩试验,结果表明,堆石料变形累积曲线呈“台阶”形,4分钟时的变形量达到了该级压力总变形量的80%以上。堆石料的压缩性随初始孔隙比的增加而变大,饱和试样的压缩性更大,风干土样的破碎应力大于饱和试样。堆石料压缩性的影响因素很多,其工程特性,有待进一步研究。

The indoor compression test was conducted on samples prepared under two states of air drying and saturation,with different initial void ratios.The results showed that the cumulative deformation curve of the rockfill material presented a"step"shape,and the deformation amount at 4 minutes reached more than 80%of the total deformation amount at that level of pressure.The compressibility of rockfill materials increases with the increase of initial void ratio,and the compressibility of saturated samples is greater.The crushing stress of air dried soil samples is greater than that of saturated samples.There are many factors affecting the compressibility of rockfill materials,and their engineering characteristics need to be further studied.