Numerical Investigation into Behavior of Retaining Wall Subject to Cycles of Freezing and Thawing

Chung-Sik Yoo

doi:10.7843/kgs.2013.29.1.81

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Numerical Investigation into Behavior of Retaining Wall Subject to Cycles of Freezing and Thawing 동결-융해 반복작용에 노출되는 옹벽의 거동에 관한 수치해석 연구

31 January 2013. pp. 81-92

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Abstract

This paper presents the results of a numerical investigation into the behavior of retaining wall subject to cycles of freezing and thawing due to seasonal temperature change. The thermo-hydro-mechanical coupled finite element modeling strategy was first established to simulate the wall behavior. A series of finite element analyses were then performed on a range of conditions representing seasonal temperature change characteristics. The results indicated that the average freezing temperature and the number of cycles of freezing and thawing were the primary influencing factors for the wall behavior. Also revealed was that the duration of freezing period does not significantly affect the wall displacement and the lateral earth pressure, and that the earth pressure on the wall does not significantly change due to the freezing and thawing action suggesting that the increase in the wall displacement during the freezing and thawing action may be attributed to degradation of backfill due to the freezing and thawing action.

Keywords

Retaining wall

Freezing

Thawing

Thermo-hydro-mechanical coupled finite-element analysis

본 논문에서는 계절적 환경변화로 인한 동결-융해 반복과정에 노출되는 옹벽의 시간 의존적 거동에 대한 수치 해석 연구 내용을 다루었다. 이를 위해 먼저 동결-융해 반복과정에 노출되는 옹벽에 대한 열-수리-응력 연계해석 기반의 모델링 기법을 정립하였으며 이러한 모델링 기법을 토대로 다양한 온도변화 조건에 대한 매개변수 연구를 수행하였다. 그 결과 다양한 온도변화 특성 중 옹벽의 거동에 미치는 주된 영향인자는 계절적 평균동결온도와 반복회수인 것으로 나타났다. 반면 동결온도의 지속시간에 대한 영향을 검토한 결과 벽체변위 및 수평토압에 큰 영향을 미치지 않는 것으로 검토되었다. 한편, 벽체에 작용하는 수평토압은 동결-융해 작용에 의한 영향을 거의 받지 않는 것으로 검토되어 결국 동결-융해로 인한 벽체 변위 증가 현상은 토압 증가에 그 원인을 찾기 보다는 동결-융해 현상으로 인한 재료적 열화 현상에 그 원인을 찾아야 할 것으로 검토되었다.

References

1.Abaqus, Inc. (2009) Abaqus user’s manual, version 6.7. Abaqus, Inc., Pawtucket, Providence, R.I.

2.Eigenbrod, K. D. (1996), “Effects of cyclic freezing and thawing on volume changes and permeabilities of soft fine-grained soils”, Canadian Geotechnical Journal, Vol.33, No.4, pp.529-37.

3.Gulla, G., Mandaglio, M., and Moraci, N. (2006). Effect of weathering on the compressibility and shear strength of a natural clay, Canadian Geotechnical Journal, Vol.43, No.6, pp.618-625.

4.Ha, S. K. (2008), “A study on weathering charateristics of cut slopes due to environmental change”, Young-Nam University Graduate School.

5.Kim, J. S. (2005). Long Term Stability Assessment Method for Rock Slopes. Young-Nam University Graduate School.

6.Lee, C. H., Park, M. S., Min, S. H., Choi, H. S., and Sohn, B. H. (2010), “Evaluation of Performance of Grouts and Pipe Sections for Closed-loop Vertical Ground Heat Exchanger by In-situ Thermal Response Test”, Journal of Korean Geotechnical Society, Vol.26, No.7, pp. 93-106.

7.Liu, H. J. and Wang, P. X. (2006), “Stability analysis of loss of stability caused by freeze and melt of earthen side slopes of highways”, Journal of Harbin Institute of Technology, Vol.38, No.15, pp.764-766.

8.Neaupane, K. M., Yamabe, T., and Yoshinaka, R. (1999), “Simulation of a fully coupled thermo-hydro-mechanical system in freezing and thawing rock”, Int. J. Rock Mech. Min. Sci., Vol.36, pp.563-580.

9.Tsai, K. J., Wang, H. Y., Chen, S. C., and Sung, Y. M. (1999). The effect of soil freezing and thawing behavior on slope stability. Proceedings, 9th Int. Offshore and Polar Engineering Conference, Brest, France: 800-803.

10.Park, D. H., Kim, K. G., K, D. Y., Jang, J. H., and Park, S. S. (2010). “Numerical Simulation of Standing Column Well Ground Heat Pump System Part 1: Validation of the Numerical Model”, Journal of Korean Geotechnical Society, Vol.26, No.2, pp.33-43.

11.Song, W. K. (2007), “Effective thermal expansion coefficient of frozen granite soil”, Canadian Geotechnical Journal, Vol.44, pp. 1137-1147.

12.Wu, J. Q., Place, M. K., McCool, D. K., and Cuhaciyan C. O. (2001). Effects of Freeze/Thaw Conditions on Soil Strength. Proc. Int. Symp. on Soil Erosion Research for the 21st Centry, Honolulu, HI, USA: 447-450.

13.Yoo, C. and Shin, B.N. (2011), “Effect of Cyclic Freezing-Thawing on Compressive Strength of Decomposed Granite Soils”, Journal of Korean Geosynthetic Society, Vol.10, No.4, pp.11-20.

14.Zhang, Z. X. and Kushwaha, R. L. (1998). Modeling soil freeze- thaw and ice effect on canal bank, Canadian Geotechnical Journal, Vol.35, No.4, pp.655-665.

Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 29
No :1
Pages :81-92
Received Date : 2012-09-21
Accepted Date : 2012-12-31
DOI :https://doi.org/10.7843/kgs.2013.29.1.81

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

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