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http://dx.doi.org/10.12814/jkgss.2018.17.4.041

The Study on The Numerical Analysis Method for Ground Improved by Cement Mixing Method  

Kim, Byung-Il (Expert Group For Earth & Environment)
Hong, Kang-Han (Expert Group For Earth & Environment)
Kim, Young-Seon (Expert Group For Earth & Environment)
Han, Sang-Jae (Expert Group For Earth & Environment)
Publication Information
Journal of the Korean Geosynthetics Society / v.17, no.4, 2018 , pp. 41-52 More about this Journal
Abstract
Since the composite ground design method is easy to apply for calculation or numerical analysis, it is applied to the design of cement mixing methods. However, the comparison studies between analysis and actual results such as a trial test and construction for the cement mixing method are few because the composite ground design method was developed for the compaction pile (SCP, GCP) methods. In this study, the results of various analysis methods, such as the composite ground analysis method (1 case) and the individual pile method (3 cases), were compared with actual measurements through a two-dimensional finite element numerical analysis. In case of the surface settlements, the results of study show that the individual plate method was larger than the actual measurements, while other methods are similar. The settlements at the under ground of the improved area is overestimated in all analysis methods. When comparing numerical analysis results for the horizontal displacement, and ground reaction forces, the individual pile method in equivalent wall concept was found to be the most similar to the measurements. The composite ground method was not able to predict the behavior of stress transfer (Arching effect) and it turned out that the prediction of horizontal displacement was too large.
Keywords
Composite ground; Cement mixing; Numerical analysis;
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  • Reference
1 Chai, J. C., Miura, N. and Kirekawa, T. (2010), "Settlement prediction for soft ground improved by columns", Ground Improvement 163, pp.109-119.   DOI
2 DWRI (2015), Manual for A Low Improvement Ratio Cement Column (ALiCC) Method, ALiCC Method Association in Japan.
3 Japan Institute of Construction Engineering (1999), "Flexible foundation, foundation structure part, design code for flexible box culvert-II", San-kai-dou Press, Tokyo, pp.233-248.
4 Abusharar, S. W. and Han, J. (2011), "Two-dimensional deep-seated slope stability analysis of embankments over stone column improved soft clay", Engineering Geology, Vol.120, No.4, pp.103-110.   DOI
5 Bergado, D. T., Chai, J. C., Alfaro, M. C. and Balasubramaniam, A. S. (1994), "Improvement techniques of soft ground in subsiding and lowland environment", Balkeman.
6 Chai J. and Pongsivasathit, S. (2010), "A method for predicting consolidation settlements of floating column improved clayey subsoil", Front Archit Civil Eng China, 4(2), pp. 241-251.   DOI
7 Chai J. and Carter, J. P. (2011), "Deformation Analysis in Soft Ground Improvement", Springer.
8 Miao, L., Wang X. and Kavazanjian, E. (2008), "Consolidation of a double layered compressible foundation partially penetrated by deep mixed column". J. of Geotech. & Geoenviron Eng., ASCE 134(8), pp.121-1214.
9 KSCE (2008), Road Bridge Design Standards.
10 Lorenzo, G. A. and Bergado, D. T. (2003), "New consolidation equation for soil-cement pile improved ground", Can Geotech. J. 40, pp.265-275.   DOI
11 Navin, M. P., Kim, M. and Filz, G. M. (2005), "Stability of embankments founded on deep-mixing-method columns: Three-dimensional considerations", Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering, pp.1229-1230.
12 Shien, N. K. (2013), "Numerical Study Of Floating Stone Columns", National University Of Singapore, 2013.
13 Shin, H. Y., Kim, B. I., Kim, K. O. and Han, S. J. (2014), "A Comparative Study of Structural Analysis on DCM Improved by Pile and Block Type", Journal of The Korean Geotechnical Society, Vol.30, No.4, April 2014 pp.5-19.   DOI
14 FHWA (2006). "Design and Construction of Driven Pile Foundations - Vol. I and II", Report No. FHWA-NHI-05-042 and FHWA-NHI-05-043, Federal Highway Administration, U.S. Department of Transportation.