방법과 유한요소법에 의한 붕괴 토류벽의 거동차이 분석 = Characteristics of Collapsed Retaining Walls Using Elasto-plastic Method and Finite Element Method

다국어 초록 (Multilingual Abstract)

In this study, a numerical analysis was performed to predict the sequential behavior of anchored retaining wall where the failure accident took place, and verified accuracy of prediction through the comparisons between prediction and field measurement. The emphasis was given to the wall behaviors and the variation of sliding surface based on the two different methods of elasto-plastic and finite element (shear strength reduction technique). Through the comparison study, it is shown that the bending moment and the soil pressure at construction stages produce quite similar results in both the elasto-plastic and finite element method. However, predicted wall deflections using elasto-plastic method show underestimate results compared with measured deflections. This demonstrates that the elasto-plastic method does not clearly consider the influence of soil-wall-reinforcement interaction, so that the tension force (anchor force and earth pressure) on the wall is overestimated. Based on the results obtained, it is found that finite element method using shear strength reduction method can be effectively used to perform the back calculation analysis in the anchored retaining wall, whereas elasto-plastic method can be applicable to the preliminary design of retaining wall with suitable safety factor.

참고문헌 (Reference)

1 최충식, "직접탐색법에 의한 굴착단계별토류벽의 역해석" 17 (17): 651-663, 1997

2 박연준, "절편법과 유한차분법에 의한 사면안정해석 비교연구" 15 (15): 263-272, 1999

3 한국지반공학회, "구조물기초 설계기준 해설" 한국지반공학회 2003

4 Jeong, S. S., "Uncoupled analysis of stabilizing piles in weathered slopes" 30 : 671-682, 2003

5 SUNEX, "Program manual, 8th edition for Ver w5.3" Geogroup Inc. 2002

6 Clough G. W., "Performance of tieback walls in clay" 12 (12): 1259-1273, 1974

7 Brinkgreve, R. B. J., "PLAXIS 2D - Version 8. Professional Version" PLAXIS B.V. 2005

8 Haliburten T. A., "Numerical analysis of flexible retaining structure" 94 (94): 1233-1251, 1968

9 Hoek, E., "Hoek-Brown Failure Criterion 2002 Edition" 1 : 267-273, 2002

10 Naylor, D. J., "Finite element and slope stability" 229-244, 1981

11 Clough G. W., "Finite element analyses of retaining wall behavior" 97 (97): 1657-1673, 1971

12 Won, J. O., "Coupled effects in stability analysis of pile.slope systems" 32 : 304-315, 2005

13 Hetenyi, M., "Beams on elastic foundation" University of Michigan Press Ann Arbor 1946

14 Briaud J. L., "Beam-column method for tieback walls" 124 (124): 67-79, 1998

15 Zeinkiewicz, O. C., "Associated and non-associated visco-plasticity and plasticity in soil mechanics" 25 (25): 671-689, 1975

16 Donald I. B., "Application of the nodal displacement method to slope stablilty analysis" 450-460, 1988

17 Jeong, S. S., "Analysis of tieback walls using proposed P.y curves for coupled soil springs" 31 : 443-456, 2004