The velocity of shear waves in unsaturated soil
The velocity of shear waves in unsaturated soil
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DOI：
10.1016/j.still.2012.05.013
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发表时间：
2012-09-01
影响因子：
6.5
通讯作者：
Attenborough, K.
中科院分区：
文献类型：
--
作者：
Whalley, W. R.;Jenkins, M.;Attenborough, K.
在不同的基质势和围压下，测量了两种土壤（壤质砂土和桑迪粘壤土）中的剪切波速度V-s。我们使用的组合海恩斯装置，压力板装置和一个主教和韦斯利三轴单元，以获得一系列的饱和和固结状态。我们提出了一个单一的有效应力变量的基础上修改主教的方程，可用于出版的经验模型（Santamarina等人，2001）将剪切波速度与土壤物理条件联系起来。净应力需要非线性变换。利用Khallili和Khabbaz（1998）提出的函数将基质势转换为吸力，因此需要估算空气进入势。我们发现，它是可能的，以配合V-S孔隙比，净应力和基质势与一组四个参数，这是共同的所有土壤在各种状态的饱和和固结。除了为这项研究收集的数据外，我们还使用了以前发表的数据（沃利等人，2011年）。剪切波测量的效用，推断土壤的物理性质进行了讨论。(C)2012爱思唯尔有限公司版权所有。
The velocities of shear waves V-s in two soils, a loamy sand and a sandy clay loam, were measured at various matric potentials and confining pressures. We used a combination of Haines apparatus, pressure plate apparatus and a Bishop and Wesley tri-axial cell to obtain a range of saturation and consolidation states. We proposed a single effective stress variable based on a modification to Bishop's equation which could be used in a published empirical model (Santamarina et al., 2001) to relate shear wave velocity to soil physical conditions. Net stress required a nonlinear transformation. Matric potential was converted into suction stress with the function proposed by Khallili and Khabbaz (1998), thus requiring an estimate of the air entry potential. We found it was possible to fit V-s to void ratio, net stress and matric potential with a set of four parameters which were common to all soils at various states of saturation and consolidation. In addition to the data collected for this study we also used previously published data (Whalley et al., 2011). The utility of shear wave measurements to deduce soil physical properties is discussed. (C) 2012 Elsevier B.V. All rights reserved.