Evaluation of Asaoka and Hyperbolic Methods for Settlement Prediction of Vacuum Preloading Combined with Prefabricated Vertical Drains in Soft Ground Treatment

Quang Dong Pham; Van Linh Ngo; The Viet Tran; Minh Thu Trinh

doi:10.5614/j.eng.technol.sci.2022.54.5.1

Authors

Quang Dong Pham Quang Nam Irrigation Department, 117 Hung Vuong, Tam Ky, Quang Nam, Vietnam
Van Linh Ngo Faculty of Civil Engineering, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam
The Viet Tran Faculty of Civil Engineering, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam
Minh Thu Trinh Faculty of Civil Engineering, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2022.54.5.1

Keywords:

Asaoka method, ground treatment, hyperbolic method, soft soil, ultimate settlement, vacuum consolidation

Abstract

This study evaluated the use of the Asaoka and hyperbolic methods to estimate the ultimate settlement of soft ground treated by vacuum preloading combined with prefabricated vertical drains. For this aim, a large-scale physical laboratory model was constructed. The model was a reinforced-tempered glass box containing a soil mass with dimensions of 2.0 1.0 1.2 m (length width depth). Physical models of this scale for the same purpose are rare in the literature. The soil was taken from a typical coastal region in Dinh Vu Hai Phong, Vietnam. The surface settlement near and between the two drains was measured right after the vacuum preloading started. Important properties of the soil were tested to evaluate the effectiveness of the treatment method. The measured settlement was used in the Asaoka and hyperbolic methods to predict the potential ultimate settlement. The results showed the superiority of the vacuum consolidation approach in improving fundamental engineering properties of soft soil. Furthermore, the ultimate settlement predicted by both methods showed a good agreement with the measured value, proving that the Asaoka and hyperbolic methods are suitable for the estimation of the ultimate settlement of soft soil treated with vacuum consolidation.

Downloads

Download data is not yet available.

References

Chai, J.C. & Carter, J.P., Deformation Analysis in Soft Ground Improvement, Springer Netherlands, Netherlands, 2011.

Griffin, H. & O?Kelly, B., Ground Improvement by Vacuum Consolidation ? A Review, Proceedings of the Institution of Civil Engineers Ground Improvement, 167(4), pp. 274-290, 2014.

Indraratna, B., Recent Advances in the Application of Vertical Drains and Vacuum Preloading in Soft Soil Stabilisation, Geomechanics Journal 45(2), pp. 1-43, 2010.

Jiang, J. & Liu, R., Effect of Improvement and Application of Composite Prefabricated Vertical Drain Method in Marine Soft Ground: A Case Study, Advances in Civil Engineering, 2019, 6097504. 2019.

Dermawan, H., Hutapea, B.M., Susila, E. & Irsyam, M., Finite Element Simulation of Vacuum Preloading at Palembang-Indralaya Toll Project, Journal of Engineering & Technological Sciences, 53(4), 210410, 2021.

Kjellman, W., Consolidation of Clay Soil by Means of Mamospheric Pressure, Proc. Conf. on Soil Stabilization, Massachusetts Institute of Technology, Boston, USA, pp. 258-263, 1952.

Chu, J. & Yan, S., Vacuum Preloading Techniques - Recent Developments and Applications, in: K. Reddy, M. Khire, A. Alshawabkeh (Eds.) The GeoCongress 2008: Geosustainability and Geohazard Mitigation, New Orleans, USA., 2008.

Chu, J., Yan, S. & Yang, H., Soil Improvement by the Vacuum Preloading Method for an Oil Storage Station, Gtechnique, 50(6), pp. 625-632, 2000.

Liu, H., Cui, Y., Shen, Y. & Ding, X., A New Method of Combination of Electroosmosis, Vacuum and Surcharge Preloading for Soft Ground Improvement, China Ocean Eng., 28(4), pp. 511-528, 2014.

Pham, Q., Tran, T. & Trinh, M., Relation between the Plasticity Index and Key Consolidation Parameters of Soft Ground Stabilized by Vacuum Preloading Together with Vertical Drains, International Journal of Geomate, 118(69), pp. 224-229, 2020.

Susila, E. & Agrensa, F., Case Study on Soft Soil Improvement using Innovative and Cost-Effective Reinforcing Techniques, Journal of Engineering and Technological Sciences, 47(2), pp. 207-217, 2015.

Lei, T.B., Xiong, S.D., Ling, F.J. & Zhang, J.D., Study on Comparison of Predicting Method on Settlement and Deformation of Unballasted Track in the Button of Tunnel on High Speed Railway, Applied Mechanics and Materials, 513-517, pp. 2647-2650, 2014.

Mosleh, A.A., Applicability of the Rectangular Hyperbolic Method to Settlement Predictions of Sabkha Soils, Geotechnical and Geological Engineering, 22, pp. 563-587, 2004.

Tan, S.A. & Chew, S.H., Comparison of the Hyperbolic and Asaoka Observational Method of Monitoring Consolidation with Vertical Drains, Soils and foundation, 36(3), pp. 31-42, 1996.

Abedian, M.A., Farrokhi, F. & Rasouli, R., Settlement Evaluation of a Concrete Face Rock-Fill Dam (CFRD) Using a Back-Analysis Method Based on Measurement Results (A Case Study of Siah-Bisheh Dam), Journal of Engineering and Technological Sciences, 50(4), pp. 516-533, 2018.

Tan, T.S., Inoue, T. & Lee, S.L., Hyperbolic Method for Consolidation Analysis, Journal of Geotechnical Engineering, 117(11), pp. 1723-1737, 1991.

Asaoka, A., Observational Procedure of Settlement Prediction, Soils and foundation 18(4), pp. 87-101, 1978.

Bergado, D.T., Daria, P.M., Sampaco, C.L. & Alfaro, M.C., Prediction of Embankment Settlements by In-situ Tests, ASTM Geotechnical Testing Journal, 14(4), pp.425-439, 1991.

Yu, F., Li, S., Dai, Z., Li, J. & Chen, S., Stability Control of Staged Filling Construction on Soft Subsoil Using Hyperbolic Settlement Prediction Method: A Case Study of a Tidal Flat in China, Advances in Transportation Geotechnics, 2020, pp. 1-11, 2020.

Li, C., A Simplified Method for Prediction of Embankment Settlement in Clays, Journal of Rock Mechanics and Geotechnical Engineering, 6(1), pp. 61-66, 2014.

Hao, J. & Dong, J., Study on Application of Asaoka Method on Settlement Prediction of Pile Foundation for High Speed Railway Bridges, 10th Asia Pacific Transportation Development Conference, American Society of Civil Engineers, Beijing, China, 2014.

Uy, E.E.S. & Dungca, J.R., A Comparative Settlement Prediction of Limestone Blended Materials Using Asaoka and Hyperbolic Method, International Journal of GEOMATE, 14(43), pp. 63-69, 2018.

Sridharan, A. & Rao, A., Rectangular Hyperbola Fitting Method for One Dimensional Consolidation, Geotech Test J., 4(4), pp.161-168, 1981.

Tan, S.A., Validation of Hyperbolic Method for Settlement in Clays with Vertical Drains, Soils and Foundations, 35(1), pp. 101-113, 1995.

Li, C., A Simplified Method for Prediction of Embankment Settlement in Clays, Journal of Rock Mechanics and Geotechnical Engineering, 6(1), pp. 61-66, 2014.

Chung, S.G., Lee, N.K. & Kim, S.R., Hyperbolic Method for Prediction of Prefabricated Vertical Drains Performance, Journal of Geotechnical and Geoenvironmental Engineering, 135(10), pp. 1519-1528, 2009.

Ngoc, V.B., Dung, N.T. & Suneel, M., Vacuum Preloading Consolidation Method: A Case Study, Proceedings of the International Symposium of Hanoi Geo-engineering, Hanoi, Vietnam, pp. 123-130, 2010.

Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System) 1, ASTM International, West Conshohocken, PA, 2017.

Huat, B.B., Hoe, N.C. & Munzir, A.H., Observational Methods for Predicting Embankment Settlement, Pertanika J. Sci., 12(1), pp. 115-128, 2004.