Consolidation behaviour of soils subjected to asymmetric initial excess pore pressure distributions
Lovisa, Julie, Read, Wayne, and Sivakugan, Nagaratnam (2010) Consolidation behaviour of soils subjected to asymmetric initial excess pore pressure distributions. International Journal of Geomechanics, 10 (5). pp. 181-189.
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Although the consolidation settlements beneath foundations and embankments are rarely one dimensional, Terzaghi's one-dimensional consolidation theory is often applied to these situations to approximate consolidation behavior. This paper investigates the consolidation behavior of a soil stratum subjected to various initial excess pore pressure distributions which occur under one-dimensional loading. The results show that analysis in terms of average degree of consolidation provides an incomplete representation of the consolidation behavior. While the average degree of consolidation curves for all uniform and linearly varying initial distributions are identical, the degree of consolidation isochrones for each distribution are unique. Furthermore, the application of a bottom-skewed initial excess pore pressure distribution results in a redistribution of pore pressures toward the skewed region so that an increase in excess pore pressure occurs at some depth after consolidation has already commenced. As a result, conventional consolidation relationships are considered inappropriate for these cases, and an alternative method of consolidation analysis in terms of normalized pore pressures is proposed.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||pore pressure; soil consolidation; clays; asymmetry|
|FoR Codes:||09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 100%|
|SEO Codes:||87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%|
|Deposited On:||16 Sep 2010 09:19|
|Last Modified:||12 Feb 2011 21:08|
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