Calculating cv based on non-uniform initial excess pore pressure
Calculating cv based on non-uniform initial excess pore pressure
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DOI：
10.1680/geot.11.p.055
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发表时间：
2012-08
期刊：
影响因子：
5.8
通讯作者：
J. Lovisa;W. Read;N. Sivakugan
中科院分区：
文献类型：
--
作者：
J. Lovisa;W. Read;N. Sivakugan
The coefficient of consolidation (cv) is often determined by comparing the characteristics of the experimental and theoretical consolidation using empirical curve-fitting procedures which are based on the theoretical U−T curve generated by a layer subjected to a uniform initial excess pore water pressure distribution. However, in cases where settlement–time data are a result of a non-uniform initial pore pressure distribution, these curve-fitting procedures are no longer valid. In this technical note, a generalised procedure for Taylor and Casagrande's popular curve-fitting procedures is proposed, where the user is directed to select appropriate adjustment factors, depending on the type of non-uniform initial excess pore pressure distribution encountered.这些因素是通过使用简单的幂函数和指数函数近似 U−T 曲线的各个区域来确定的。在非均匀情况下，幂近似仅捕获 U−T 曲线的一小部分，可能很难使用 t...
The coefficient of consolidation (cv) is often determined by comparing the characteristics of the experimental and theoretical consolidation using empirical curve-fitting procedures which are based on the theoretical U−T curve generated by a layer subjected to a uniform initial excess pore water pressure distribution. However, in cases where settlement–time data are a result of a non-uniform initial pore pressure distribution, these curve-fitting procedures are no longer valid. In this technical note, a generalised procedure for Taylor and Casagrande's popular curve-fitting procedures is proposed, where the user is directed to select appropriate adjustment factors, depending on the type of non-uniform initial excess pore pressure distribution encountered. These factors were determined by approximating separate regions of the U−T curves using simple power and exponential functions. In non-uniform cases where the power approximation only captures a small portion of the U−T curve it may be difficult to use t...