Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_10-009-cd
Settlement Prediction of Teven Road Trial Embankment Using Back Analysis Methods
1Discipline of Civil, Surveying and Environmental Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia.
2SMEC, Australia & New Zealand Division, Australia.
3Transport for NSW, NSW 2308, Australia.
ABSTRACT
The Teven Road trial embankment is located adjacent to the existing Pacific Highway which is in the south of the National Field Testing Facility (NFTF) at Ballina, New South Wales, Australia. The construction of the trial embankment took over 7 years (2826 days). A sharp increase of the monitored ground settlement behavior was observed from 1940 to 2160 days, which makes it difficult to predict the settlement at early stages. To investigate how back analysis methods can be used to predict future settlement for Teven Road trial embankment, this study applied Asaoka method, Hyperbolic method and Bayesian back analysis method to predict settlement based on the monitored settlements. The results show that the prediction obtained by Asaoka and Hyperbolic methods are similar. The prediction made by Asaoka method is not stable due to the limited available records after the final loading. The predictions made by Bayesian back analysis agree with the measurements using 2400 days monitored data and the predictions can be further improved by incorporating creep.
Keywords: Settlement prediction, back analysis, embankment, soft soil creep.
