- Title
- Nonlinear radial consolidation of vertical drains under a general time-variable loading
- Creator
- Lu, Mengmeng; Wang, Shanyong; Sloan, Scott W.; Indraratna, Buddhima; Xie, Kanghe
- Relation
- ARC.DP140100509 & ARC.CE110001009
- Relation
- International Journal for Numerical and Analytical Methods in Geomechanics Vol. 39, Issue 1, p. 51-62
- Publisher Link
- http://dx.doi.org/10.1002/nag.2295
- Publisher
- John Wiley & Sons
- Resource Type
- journal article
- Date
- 2015
- Description
- By incorporating the nonlinear variation of a soil's compressibility and permeability during the process of consolidation, an analytical solution for the radial consolidation of vertical drains has been developed for a general time-variable loading. The general solution was verified for the cases of instantaneous loading and ramp loading. Detailed solutions were further derived for two special loading schemes: multistage loading and preloading–unloading–reloading. The nonlinear consolidation behavior of a vertical drain subjected to these two types of loading schemes was then investigated by a parametric study. The results show that the loading rate, the ratio of the compressibility index to the permeability index (Cc/Ck), and the initial stress state have a significant influence on the consolidation rate. A smaller value of Cc/Ck, a larger initial stress, or a fast loading rate always leads to a rapid consolidation rate. During the unloading period, a negative excess pore water pressure may occur, and a slower unloading rate may reduce this negative value.
- Subject
- consolidation; nonlinearity; vertical drain; multistage loading; preloading–unloading– reloading
- Identifier
- http://hdl.handle.net/1959.13/1331978
- Identifier
- uon:26755
- Identifier
- ISSN:0363-9061
- Language
- eng
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