Calculated and observed long term performance of Leneghans embankment

Manivannan, G. and Karim, M.R. and Gnanendran, C.T. and Lo, S.C.R. (2011) Calculated and observed long term performance of Leneghans embankment. Geomechanics and Geoengineering, 6 (3). pp. 195-207. ISSN 1748-6033, DOI

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This paper presents the finite element (FE) analysis of the consolidation of the foundation of an embankment constructed over soft clay deposit which shows significant time dependent behaviour and was improved with prefabricated vertical drains. To assess the capability of a simple elastic viscoplastic (EVP) model to predict the long term performance of a geotechnical structure constructed on soft soils, a well documented (Leneghans) embankment was analyzed to predict its long term behaviour characteristics. Two fully coupled two dimensional (2D) plane strain FE analyses have been carried out. In one of these, the foundation of the embankment was modelled with a relatively simpler time dependent EVP model and in the other one, for comparison purposes, the foundation soil was modelled with elasto-plastic Modified Cam-clay (MCC) model. Details of the analyses and the results are discussed in comparison with the field performance. Predictions from the creep (EVP) model were found to be better than those from Elasto-plastic (MCC) analysis. However, the creep analysis requires an additional parameter and additional computational time and resources.

Item Type: Article
Additional Information: Cited By (since 1996):2 Export Date: 16 December 2013 Source: Scopus Language of Original Document: English Correspondence Address: Karim, M. R.; School of Engineering and Information Technology, University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600, Australia; email: References: Carter, J.P., Ballam, N.P., (1995) AFENA Users' Manual Version 5.0, , computer program. Center for Geotechnical Research, University of Sydney, Sydney-2006, Australia; Carter, J.P., Booker, J.R., Small, J.C., The analysis of finite elasto-plastic consolidation (1979) International Journal for Numerical and Analytical Methods in Geomechanics, 3, pp. 107-129; Gnanendran, C.T., Manivannan, G., Lo, S.-C.R., Influence of using a creep rate or an elastoplastic model for predicting the behaviour of embankments on soft soils (2006) Canadian Geotechnical Journal, 43 (2), pp. 134-154; Hird, C.C., Pyrah, I.C., Russel, D., Finite element modelling of vertical drains beneath embankments on soft ground (1992) Geotechnique, 42 (3), pp. 499-511; Hird, C.C., Pyrah, I.C., Russel, D., Cinicioglu, F., Modelling the effect of vertical drains in two-dimensional finite element analyses of embankments on soft ground (1995) Canadian Geotechnical Journal, 32, pp. 795-807; Janbu, N., Soil compressibility as determined by oedometer and triaxial tests (1963) European conference on soil mechanics and foundation engineering, pp. 19-25. , Paper presented at the, Wiesbaden; Karim, M.R., Gnanendran, C.T., Lo, S.-C.R., Mak, J., Predicting the long-term performance of a wide embankment on soft soil using an elastic-visco-plastic model (2010) Canadian Geotechnical Journal, 47, pp. 244-257; Karim, M.R., Manivannan, G., Gnanendran, C.T., Lo, S.-C.R., Predicting the long-term performance of a geogridreinforced embankment on soft soil using two-dimensional finite element analysis (2011) Canadian Geotechnical Journal, 48 (5), pp. 741-753; Kutter, B.L., Sathialingam, N., Elastic-viscoplastic modelling of the rate-dependent behaviour of clays (1992) Geotechnique, 42, pp. 427-441; Lo, S.R., Mak, J., Gnanendran, C.T., Zhang, R., Manivannan, G., Long-term performance of a wide embankment on soft clay improved with prefabricated vertical drains (2008) Canadian Geotechnical Journal, 45, pp. 1073-1091; Mak, J., (1996) F3 freeway, city of Newcastle, Leneghans Drive, Minimi to Beresfield, Swamp-2, Monitoring report no. 3, , Scientific Services Branch, RTA, New South Wales, Australia; Rowe, R.K., Gnanendran, C.T., Landva, A.O., Valsangkar, A.J., Calculated and Observed Behaviour of a Reinforced Embankment over Soft Compressible Soil (1996) Canadian Geotechnical Journal, J33, pp. 324-339; Taylor, D.W., (1948) Fundamentals of soil mechanics, , New York, NY: John Wiley & Sons
Uncontrolled Keywords: Coupled analysis, Creep, Embankment, Geosynthetic reinforcement, Soft soil, Time dependency, consolidation, elastoplasticity, finite element method, foundation, geosynthetics, performance assessment, soil reinforcement, soil-structure interaction
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 07 Apr 2014 02:19
Last Modified: 07 Apr 2014 02:19

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