Linear representation of steady-state line for sand
Linear representation of steady-state line for sand
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DOI：
10.1061/(asce)1090-0241(1998)124:12(1215
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发表时间：
1998-12-01
影响因子：
3.9
通讯作者：
Wang, Y
中科院分区：
文献类型：
--
作者：
Li, XS;Wang, Y
稳态线将稳态变形期间土壤的有效围压（p '）与孔隙比（e）联系起来。该线通常在e-log p'平面中绘制，并且在该平面中被视为直线。然而，长期以来，人们已经观察到，无粘性土的稳态线通常在e-log p'平面内是弯曲的，将它们视为直线只是为了简单起见。作为替代方案，本说明建议在e-（p '/p（alpha））（alpha）平面上绘制无粘性土壤的稳态线，其中p（alpha）是大气压力，用作标准化的参考压力，alpha是一个大约0.7的数字，可以微调以进行优化。注记表明，在e-（p '/p（alpha））（alpha）平面内，沙的稳态线几乎是直的，而直度对参数alpha不敏感。本文介绍了平面选择的考虑因素，并通过实例说明了矫直效果。
The steady-state line relates the effective confining pressure (p') with the void ratio (e) of a soil during steady-state deformation. The line is commonly plotted in an e-log p' plane and is treated as a straight line in that plane. However, it has long been observed that the steady-state lines for cohesionless soils are in general curved in the e-log p' plane, and treating them as straight lines is done only for simplicity. As an alternative, this note suggests the steady-state lines of cohesionless soils be plotted in the e-(p'/p(alpha))(alpha) plane, where p(alpha) is the atmospheric pressure serving as a reference pressure for normalization, and alpha is a number around 0.7 that can be fine tuned for optimization. It is shown in the note that the steady-state lines of sand are nearly straight in the e-(p'/p(alpha))(alpha) plane, and the straightness is insensitive to the parameter alpha. This note presents the consideration behind the choice of the plane and demonstrates the straightening effects by examples.