Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2008.03a
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- Pages.1260-1268
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- 2008
Numerical analysis of deep excavation in layered and asymmetric ground conditions
흙막이 굴착 시 지층 경사의 영향에 대한 수치해석적 분석
-
Shin, Jong-Ho
(Dept. of Civil Engineering, Konkuk University)
;
- Kim, Hak-Moon (Dept. of Civil and Environmental Eng. Dankook University) ;
-
Kim, Sang-Hwan
(Dept. of Civil Engineering, Hoseo University)
;
- Kim, Sang-Kil (Civil Structure Engineering, MIDAS IT) ;
- Nam, Taek-Soo (Dept. of Civil Engineering, Konkuk University)
- Published : 2008.03.28
Abstract
In case of deep excavation analysis, the theory of beam on elasto-plastic geo-material (elasto-plastic theory) can not consider the inclined ground layers appropriately. It is frequently assumed that the soil layers are parallel to the surface. However, the soil layers are generally inclined and even asymmetric. The common modelling of the asymmetric half section of the excavation system using the elasto-plastic theory, can lead differences from the real behaviour of ground, which has critical significance in case of deep excavation in urban area. In this study, an attempt to find appropriate modelling methods was made by carrying out a comparative study between the FEM and the elasto-plastic analyses. It is shown that in case of the upward-inclined soil profile the elasto-plastic theory may underestimate the performance of retaining structures.