Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Horizontal Earth Pressure of the Backfill in the Narrowly Excavated Ground Considering Various Boundary Conditions

좁게 굴착된 뒤채움 지반의 경계조건에 따른 수평응력 변화에 관한 연구

  • Kim, Hee Su (Dept. of Civil Engineering, Kangwon National University) ;
  • Ban, Hoki (Dept. of Civil Engineering, Kangwon National University) ;
  • Moon, Chang-Yeul (Dept. of Civil Engineering, Kangwon National University)
  • Received : 2017.09.15
  • Accepted : 2017.10.16
  • Published : 2017.11.01
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Abstract

When narrowly excavated in the urban area, the wall of backfill space is not only symmetrical but also asymmetrical. In this case, the horizontal stress induced by backfilling depends mostly on the wall asymmetry and the wall friction angle. Therefore, in this study, the model test in the laboratory was conducted to investigate horizontal earth pressure with depth considering various boundary conditions such as base width, wall friction, relative density of backfill, and wall angle. As the wall is smoother and wall angle is lower from the bottom, the results showed higher the horizontal stresses due to the increase of vertical stresses.

도심지에서 굴착 시 흔히 볼 수 있는 좁게 굴착된 경우 뒤채움이 되는 공간의 벽면은 대칭뿐 아니라 비대칭의 형태가 발생한다. 이러한 경우 뒤채움으로 인해 발생하는 수평응력은 벽면의 비대칭성 및 벽면의 마찰각에 따라 달라진다. 따라서 본 연구에서는 다양한 경계조건(저부폭, 벽면마찰, 뒤채움 지반의 상대밀도, 벽면경사)에 따른 깊이별 수평응력을 토조를 이용한 실내모형 실험을 통해 살펴보았다. 전체적으로 벽면이 매끄러울수록 경사가 수평에서 적을수록 수직응력의 증가로 인해 수평응력이 증가하였다.

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References

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