A Numerical Study on Behavior of Soft Clay Soils with Installed Buttress Type Self Supporting Composite Wall

Dongkwan Kim; Hyun-Seok Jung; Hangseok Choi; Jongmuk Won

doi:10.7843/kgs.2019.35.11.15

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2019 Vol.35, Issue 11 Preview Page Next Page

Research Article

A Numerical Study on Behavior of Soft Clay Soils with Installed Buttress Type Self Supporting Composite Wall 격벽형 중력식 2열 합성소일벽(BSCW)공법을 적용한 연약점토지반의 거동에 대한 수치해석적 연구

30 November 2019. pp. 15-23

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Abstract

본 연구에서는 수치해석을 이용해 격벽형 중력식 2열 합성소일벽(BSCW) 공법의 변위에 대해 분석하고 고찰하였다. 수치해석 모델은 BSCW 앞면 중심부의 현장 변위 데이터를 통하여 검증되었고 세 가지 다른 점토지반(soft, medium, stiff)의 점착력 및 탄성계수에 대한 매개변수 해석을 수행하였다. 또한 Jumbo Special Pattern 공법을 이용한 저면 시멘트 칼럼의 Center-To-Center 간격에 대한 매개변수 해석도 수행하였다. 매개변수 해석 결과, BSCW의 변위는 연약 점토 지반에서 가장 크게 나타났고, 낮은 탄성계수를 가진 지반인 경우 낮은 Center-to-Center 간격이 요구되었다.

In this study, the displacement of soft clay layer with installed Buttress type Self supporting Composite Wall (BSCW) was investigated using numerical method. The model was validated using the field displacement data at the front center of BSCW and parametric analysis of the model was implemented at varied cohesion, elastic modulus of 3 different clay layers (soft, medium, and stiff). In addition, parametric study was also performed for varied center-to-center distance of bottom cement grouting columns installed by jumbo special pattern (JSP) method. The results of parametric study demonstrated that the displacement of BSCW is the most significant in soft clay layer and low center-to-center distance of grouting columns is required at relatively low elastic modulus of clay layer.

Keywords

Buttress type self supporting composite wall

Clay layer

Cohesion

Elastic modulus

Parametric study

References

Budhu, M. (2010), Soil mechanics and foundations (3rd edition), John Wiley & Sons, New York, pp.282.

Hunt, R. E. (1986), Geotechnical Engineering Plactices, McGraw-Hill, New York, pp.134.

Jeonnam Development Corperation (2013), Ground Investigation Report for the land development project of O-ryong District in Nam-ak New Town, pp.102.

Korean Geotechnical Society (2009), Design criteria of structural foundation, pp.251.

Lee, I. M. (2013), Principles of soil mechanics, second edition, CIR, Korea, pp.311.

Ministry of Land, Infrastructure and Transport (2016), Standard specification: measurement during construction, KCS 11 10 15, pp.51.

Oh, S. (2014), Study on improvements for the prevention of collapse during the excavation, Master Thesis, Hanyang University, pp.31.

Purkar, M. S. and Kute, S. (2015), "Finite Element Analysis of a Concrete-rigid Wall Retaining a Reinforced Backfill", International Journal of Geo-Engineering, Vol.6, No.1, pp.14.

10.1186/s40703-015-0014-3

Ravindra, K. Dhir Obe, Jorge de Brito, Rui V. Silva, and Chao Qun Lye (2019), Sustainable Construction Materials:Recycled Aggregates, Woodhead Publishing, Cambridge, pp.320.

Terzaghi, K., Peck, R. B., and Mesri, G. (1996), Soil mechanics in engineering practice, John Wiley & Sons, New York, pp.22.

Yhim, S. S. and Lee, J. S. (1999), "Determination of Initial Prestress Force of Earth Anchors in Rock on Excavation", Journal of The Korean Society of Civil Engineers, Vol.19, No.3-1, pp.178.

Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 35
No :11
Pages :15-23
Received Date : 2019-08-03
Revised Date : 2019-09-17
Accepted Date : 2019-10-15
DOI :https://doi.org/10.7843/kgs.2019.35.11.15

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

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