A general semi-analytical solution for predicting axisymmetric consolidation behavior of multi-layered unsaturated soil

被引：1
作者：
Huang M. [1 ,2 ]
Lv C. [1 ,2 ]
Zhou Z. [1 ,2 ]
机构：
[1] Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha
[2] College of Civil Engineering, Hunan University, Changsha
来源：
Arabian Journal of Geosciences | 2021年 / 14卷 / 19期
关键词：
Axisymmetric consolidation; Multi-layered; Semi-analytical solution; Unsaturated soil; Vertical drains;
D O I：
10.1007/s12517-021-08266-x
中图分类号：
学科分类号：
摘要：
In geotechnical engineering, one common application of geosynthetics is to prefabricate vertical drains for accelerating the consolidation of soft soils. The consolidation phenomenon of the soil around a vertical drain is generally modeled as an axisymmetric consolidation system. Considering the unsaturated and layered properties of natural soil, this paper attempts to constitute a reliable model for predicting the axisymmetric consolidation behavior of multi-layered unsaturated soil. On the basis of the common eigenfunction expansion and Laplace transform methods, a general semi-analytical solution is derived to assess the excess pore-air and pore-water pressures as well as the soil settlement. The correctness and accuracy of the derived solution are verified against the available analytical solution for a homogenous case and against the finite difference solution for two multi-layered cases. A typical worked example incorporating an asymptotic load is provided to demonstrate the axisymmetric consolidation behavior of a three-layered unsaturated soil, and the influences from the coefficients of air and water permeability are illustrated and discussed. © 2021, Saudi Society for Geosciences.
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  • [1] Abuel-Naga H.M., Pender M.J., Bergado D.T., Design curves of prefabricated vertical drains including smear and transition zones effects, Geotext Geomembr, 32, pp. 1-9, (2012)
  • [2] Barden L., Consolidation of compacted and unsaturated clays, Géotechnique, 15, 3, pp. 267-286, (1965)
  • [3] Barden L., Consolidation of clays compacted dry and wet of optimum water content, Géotechnique, 24, 4, pp. 605-625, (1974)
  • [4] Barron R.A., Consolidation of fine-grained soils by drain wells, Transactions of ASCE, 113, pp. 718-742, (1948)
  • [5] Blight G.E., Strength and Consolidation Characteristics of Compacted Soils, (1961)
  • [6] Chen J.F., Tolooiyan A., Xue J.F., Shi Z.M., Performance of a geogrid reinforced soil wall on PVD drained multilayer soft soils, Geotext Geomembr, 44, 3, pp. 219-229, (2016)
  • [7] Coduto D.P., Yeung M.R., Kitch W.A., Geotechnical engineering: Principles and practices., (2011)
  • [8] Conte E., Plane strain and axially symmetric consolidation in unsaturated soils, Int J Geomech, 6, 2, pp. 131-135, (2006)
  • [9] Conte E., Troncone A., Radial consolidation with vertical drains and general time-dependent loading, Can Geotech J, 46, 1, pp. 25-36, (2009)
  • [10] Craig R.F., Craig’s soil mechanics, (2004)
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