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Centrifuge Model Experiments and Numerical Analyses of the Behavior of Excavated Marine Clay Slope  

Park, Byung-Soo (G-1 Tech Co. Ltd.)
Publication Information
Journal of Ocean Engineering and Technology / v.20, no.5, 2006 , pp. 49-56 More about this Journal
Abstract
In this thesis, centrifuge model experiments and numerical analyses were carried out to investigate the behavior of an excavated slope in soft clay ground. Centrifuge model tests were performed with various slopes for the excavated ground, such as 1:1.5 and 1:2. Pore pressuresthe model ground were measured to find their effects on the stability of the excavated slope. These experiments showed that the model with 1:2.5 maintained its stability within a short period of time and failed gradually. Therefore, anexcavated slope of soft soil with this slope might maintain stable conditions within a certain time. The mode1 with a 1:3 slope was observed to maintain a very stable condition, showing insignificant deformation in the ground after being excavated. Numerical analyses with PLAXIS, a commerciallyavailable software implemented with the finite element numerical technique, were performed to find the pore pressure distribution within the ground mass and the deformation of the soil. From the results of numerical analysis, a negative pore pressure was developed after the excavation and thus the stability of the slope was maintained. The safety factor for slope failure was found to decrease with time because of the dissipation of negative pore pressure with time.
Keywords
Soft ground; Slope stability; Centrifugal model test; Replacement excavation;
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  • Reference
1 이정복 (2001). '수중 굴착사면의 파괴형상에 관한 원심모형실험', 석사학위논문, 충북대학교
2 허열, 이처근, 안광국 (2001). '지하수위가 있는 굴착사면의 파괴양상에 관한 원심모델링', 대한토목학회 논문집 21권, 제4-C호, pp 453-463
3 PLAXIS (1998). 'User's mannual', BALKEMA
4 윤요진 (2000). '다짐 지반에 조성되는 굴착사면의 최적 안정 기울기에 관한 연구', 석사학위논문, 공주대학교
5 이명원 (1997). '수중 굴착사면의 안정해석', 석사학위논문, 충북대학교
6 Goodings, D.J. and Schofield, AN. (1985). 'A centrifugal model study of slope instability in Ottawa area Champlain Sea clay', Canadian Geotechnical Journal, Vol 22, No 1, pp 102-109   DOI   ScienceOn
7 Roscoe, K.H. and Burland, J.B. (1%8). 'On the generalized stress-stain behavior of wet clays', Proceedings of Eng, Plasticity, Cambridge, Cambridge University Press, Cambridge, England, pp 535-609
8 Chappell, BA (1987). 'Deformational control unstable slopes', ASCE Journal of Engineering, Vol 113, No 4, pp 299-319   DOI   ScienceOn