Numerical Analysis of the Consolidation Behavior of Soft Clay Subjected to Individual Vacuum Pressure

Du Hwoe Jung; Jeong Bhin Lee; Jun Seuk Lee

doi:10.7843/kgs.2021.37.4.27

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2021 Vol.37, Issue 4 Preview Page Next Page

Research Article

Numerical Analysis of the Consolidation Behavior of Soft Clay Subjected to Individual Vacuum Pressure 개별진공압밀공법을 적용한 연약점토 지반의 압밀거동 분석을 위한 수치해석적 사례연구

30 April 2021. pp. 27-37

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Abstract

An individual vacuum consolidation system has gained a popularity for a ground improvement of soft clayey soil. Finite element anaylses have been performed to simulate the individual vacuum consolidation system using a Plaxis 2D. The modelling procedures of the vacuum consolidation system are presented with the results of an unit-cell analysis. In addition, a case study was carried out to assess the applicability of the Plaxis 2D for simulating the consolidation behavior of soft ground subjected to the individual vacuum pressure.

Keywords

Consolidation

Individual vacuum consolidation method

Soft clay

Vacuum pressure

개별진공압밀공법을 적용한 연약점토 지반의 압밀거동을 분석하기 위하여 Plaxis 2D를 이용하여 유한요소해석을 수행하였다. 진공압을 묘사하기 위한 세부적인 방법을 unit-cell 해석 결과와 함께 제시하고, 실제 시공사례를 모델링하여 수치해석결과와 현장계측결과를 비교해봄으로써 개별진공압밀공법이 적용된 연약지반의 압밀거동을 예측하기 위한 Plaxis 2D의 사용 가능성 검토와 해석기법을 제시한다.

References

Indraratna, B. and Redana, I.W. (1997), "Plane Strain Modeling of Smear Effects Associated with Vertical Drains", Journal of Geotechnical And Geoenvironmental Engineering, ASCE., Vol.123, No.5, pp.474-478. 10.1061/(ASCE)1090-0241(1997)123:5(474)

Indraratna, B. and Redana, I. W. (2000), "Numerical Modeling of Vertical Drains with Smear and Well Resistance Installed in Soft Clay", Canadian Geotechnical Journal, Vol.37, pp.132-145. 10.1139/t99-115

Indraratna, B., Rujikiatkamjorn, C., and Sathananthan, I. (2005), "Analytical and Numerical Solutions for a Single Vertical Drain Including the Effects of Vacuum Preloading", Canadian Geotechnical Journal, Vol.42, pp.994-1014. 10.1139/t05-029

Rujikiatkamjorn, C., Indraratna, B., and Chu, J. (2008), "2D and 3D Numerical Modeling of Combined Surcharge and Vacuum Preloading with Vertical Drains", International Journal of Geomechanics, ASCE., Vol.8, No.2, pp.144-156. 10.1061/(ASCE)1532-3641(2008)8:2(144)

Perera, M.D.A. (2015) "Modelling Vertical Drains with Vacuum Preloading Considering the Soil Structure Characteristics", Thesis for the Degree of Doctor of Philosophy, School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia.

Hansbo, S. (1981), "Consolidation of Fine-grained Soils by Prefabricated Drains", Proc. 10^th International Conference on Soil Mechanics and Foundation Engineering, Vol.3, pp.12-22.

Hansbo, S. (1987), "Design Aspects of Vertical Drains and Lime Column Installations", Proceedings of 9th Southeast Asian Geotechnical Conference, Bankok, Thailand, Vol.2, pp.8-12.

Dong-Ah Geological Engineering Company (2013), "A Report on Field Measurement Control of the Site Improvement for the Construction of LNG Cryogenic Machine Technology Center".

Dong-Ah Geological Engineering Company (2016), "A Report on Field Measurement Control of the Site Improvement for the Construction of Lotte Versalis Complex".

Schmertmann, J.H. (1953), "The Undisturbed Consolidation Behavior of Clay", ASCE Transactions, Vol.120, pp.1201-1233. 10.1061/TACEAT.0007231

Olson, R.E. (1986), "State of the Art: Consolidation Testing", Consolidation of soils: Testing and Evaluation, ASTM STP 892, pp.7-68. 10.1520/STP34606S

Bergado, D., Asakami, H., Alfaro M., and Balasubramaniam, A. (1991), "Smear Effects of Vertical Drains on Soft Bangkok Clay", Journal of Geotechnical Engineering, ASCE, Vol.117, No.10. 10.1061/(ASCE)0733-9410(1991)117:10(1509)

Rixner, J.J., Kraemer, S.R., and Smith, A.A. (1986), "Prefabricated Vertical Drains", Vol.1 (Engineering Guidelines), Ferderal Highway Administration, Report No. FHWA-RD-86/168, Washington D.C., pp.33-37.

Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 37
No :4
Pages :27-37
Received Date : 2021-04-08
Revised Date : 2021-04-16
Accepted Date : 2021-04-16
DOI :https://doi.org/10.7843/kgs.2021.37.4.27

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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