知识与财富的链接
利用应变控制式三轴仪对稻谷堆的压缩密度与体变模量进行了测定,并分析了围压对稻谷堆压缩密度的影响以及围压和含水率对稻谷堆体变模量的影响。结果表明:同一含水率(11.50%、13.14%、14.47%、15.86%、17.37%)下,稻谷堆的压缩密度随着围压(23~188 kPa)的增大而增大,其变化范围分别为0.664 6~1.067 9 g/cm3、0.670 8~1.081 5 g/cm3、0.678 1~1.084 2 g/cm3、0.681 4~1.142 3 g/cm3、0.686 1~1.168 8 g/cm3;稻谷堆的体变模量随着围压(23~188 kPa)的增大而增大,其变化范围分别为311.52~495.06kPa、294.73~487.80 kPa、291.61~450.05 kPa、210.34~430.04 kPa、160.16~301.07 kPa;同一围压下,稻谷堆的体变模量随着含水率的增大而减小,并可拟合出回归方程k=-aW2+bW-c,式中:W为含水率,k为体变模量,且a,b,c随着围压的不同而变化。
In this paper, the compressive density and bulk strain modulus of paddy pile were measured by the strain-controlled triaxial apparatus. The effect of confining pressure on compressive density of paddy pile and the effect of confining pressure and moisture content on bulk strain modulus were analyzed and discussed. It shows that in the same moisture content (11.50%,13.14%,14.47%,15.86% and 17.37% w.b), as the confining pressure increases from 23 to 188 kPa, the compressive density of paddy pile increased from 0.6646 to 1.0679 g/cm3, from 0.6708 to 1.0815 g/cm3, from 0.6781 to 1.0842 g/cm3, from 0.6814 to 1.1423 g/cm3 and from 0.6861to 1.1688 g/cm3 respectively; the bulk strain modulus of paddy pile increased from 311.52 to 495.06 kPa, from 294.73 to 487.80 kPa, from 291.61 to 450.05 kPa, from 210.34 to 430.04 kPa and from 160.16 to 301.07 kPa respectively; in the same confining pressure, bulk strain modulus of paddy pile decreased with the moisture content from 11.5% to 17.37% w.b, which could fit a regression equation as y = -ax2 bx –c, where x is the moisture content, y is the bulk strain modulus and a, b, c vary with the confining pressure.
