Affiliation:
1. Department of Civil Engineering, University of Coimbra, Portugal
2. Ferbritas, Lisbon, Portugal
Abstract
The effect of applying preloading on the creep behaviour of a soft soil is studied by one-dimensional and drained triaxial creep tests. The results show that the application of preloading is very efficient, especially in the short term. Although oedometer test results, in the long term, showed an increase of the secondary compression index over time, the effectiveness of the preloading is maintained. These results are supported by drained triaxial creep tests, which show a reduction of creep strains when preloading is applied, increasing this effect over time. Moreover, the application of preloading does not affect the post-shear behaviour in terms of the ultimate strength, the effective stress path or the stiffness of the soil.
Subject
Earth and Planetary Sciences (miscellaneous),Geotechnical Engineering and Engineering Geology
Reference18 articles.
1. Precompression design for secondary settlement reduction
2. Correia AAS . Applicability of Deep Mixing Technique to Portuguese Soft Soils. PhD dissertation, 2011, University of Coimbra, Portugal, (in Portuguese).
3. Discussions and Closure: Secondary Compression of Peat with or Without Surcharging
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