• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1999년도 봄 학술발표회 논문집
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• pp.113-120
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• 1999

Deep excavation,1 in the urban areas may cause terrible damages to the adjacent structures. Most damages are due to the settlement of ground during excavation work. This article introduces two actual examples of structure damage in subway construction projects. A through of attempts to find out the factors that are affecting to the settlement of ground was made through site investigations and analyses of measurement data. Some suggestions are given to prevent the repeat of trial and error in deep excavation projects. This kind of attempts are eccentrical to the development and improvement of information-oriented construction method.

• 한국지반공학회논문집
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• 제34권4호
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• pp.49-55
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• 2018

근접굴착 시 지반변위를 억제하여 기존건물의 안정성을 확보하기 위해 굴착공사 중 흙막이벽체의 버팀대에 선행하중을 가하고 그 효과를 확인하였다. 선행하중을 가한 경우와 가하지 않은 경우에 대해서도 대형모형실험을 하였다. 지표면에 건물하중이 없는 경우와 건물하중이 있는 경우 각각 0m, 1D, 2D 에 대해 대형모형실험을 실시하였다. 본 연구에서는 모형실험에는 12m 폭의 기존건물을 축척 1:10으로 사용하였고, 폭 2m, 높이 6m, 길이 4m를 가진 대형토조에서 흙막이벽체와 인접건물의 거동에 대하여 실험을 수행하였다. 그 결과, 흙막이벽체의 버팀대에 선행하중을 작용시켜 흙막이벽체의 수평변위를 억제시켰을때 벽체배면 가상주동활동영역 내에 있는 인접건물의 안정성이 크게 향상되는 것을 확인하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 가을 학술발표회 논문집
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• pp.451-458
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• 2002

This paper presents the prediction of deep excavation-induced ground surface movements using artificial neural network, which is of prime importance in the perspective of damage assessment of adjacent buildings. A finite element model, which can realistically replicate deep-excavation-induced ground movements was employed and validated against available large-scale model test results. The validated model was then used to perform a parametric study on deep excavations with emphasis on ground movements. Using the result of the finite element analysis, Artificial Neural Network(ANN) system is formed, which can be used in the prediction of deep exacavation-induced ground surface displacements. The developed ANN system can be effecting used for a first-order prediction of ground movements associated with deep-excavation.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.69-76
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• 2003

This paper presents the prediction of deep excavation-induced ground surface movements using artifical neural network(ANN) technique, which is of prime importance in the perspective of damage assessment of adjacent buildings. A finite element model, which can realistically replicate deep excavation-induced ground movements was employed to perform a parametric study on deep excavations with emphasis on ground movements. The result of the finite element analysis formed a basis for the Arificial Neural Network(ANN) system development. It was shown that the developed ANN system can be effecting used for a first-order prediction of ground movements associated with deep-excavation.

• 한국지반공학회논문집
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• 제20권3호
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• pp.53-65
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• 2004

본 연구에서는, 굴착 공사로 인한 주변 건물 손상 평가의 일환으로 지표 변위유형의 효과적인 예측 방안을 제시하였다. 먼저 검증된 유한요소 모델을 국내에서 행해지는 다양한 경우의 굴착특성으로 해석한 결과를 통해 인접 지반의 거동에 대한 매개 변수 연구를 수행하였고, 인공신경망 엔진의 학습을 위한 데이터베이스를 구축하였다. 최적의 구조로 학습된 신경망 엔진은 간단한 굴착 특성으로 다양하게 나타나는 지표 변위 유형 예측에 효율적임을 검증하였다.

• 한국지반공학회논문집
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• 제22권12호
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• pp.77-88
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• 2006

지중연속벽 시공을 위한 트렌치 굴착시 굴착배면지반의 침하거동을 규명하기 위한 모형실험을 실시하였다. 트렌치 굴착을 모사하는 모형실험장치를 제작하였으며 계측시스템을 이용하여 트렌치 굴착시 굴착배면지반의 침하를 측정하였다. 모형실험결과 트렌치 굴착시 굴착배면지반의 침하량은 굴착면에 가까워질수록 크게 증가하는 경향을 보이는 것으로 나타났다. 지반의 상대밀도가 작고, 지하수위가 높을수록 굴착시 배면지반에서의 침하량은 크게 발생하였다. 그리고, 굴착배면지반에서의 침하량은 최종 굴착깊이의 약40%에 해당하는 이격거리에서 급격하게 증가함을 알 수 있었다. 한편, 트렌치 굴착완료후 굴착면내 안정액의 수위를 저하시킬 경우 굴착측벽에서는 벌징(Bulging) 현상이 발생되고, 굴착배면지반에서는 침하현상이 발생되어 종국에는 굴착면 상부에서 지반붕괴가 발생되었다. 모형실험에서 측정된 굴착배면지반에서의 침하량은 Clough and O'Rourke(1990)에 의해 제안된 침하량보다 작게 발생하였으며, 굴착배면지반의 침하기준선은 굴착벽면 주변에서 급격하게 증가하는 쌍곡선형태로 관찰되었다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.561-568
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• 2003

The protection of adjacent structures in urban excavation has been an important issue. But the research on the interaction between ground movements and adjacent structure has been scarce, therefore this study was necessitated. Current design practice for the prediction of excavation-induced ground movements heavily rely on empirical method. In this study, damage levels of brick building are examined closely by means of angular distortion, deflection ratio, horizontal strain. The results of numerical analysis indicated that the movement of actual building was 60∼65% of the ground movement, while angular distortion was 45∼65%. Also numerical analysis for the assessment of brick building can be applied to the building protection at various construction stages.

• Geomechanics and Engineering
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• 제20권4호
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• pp.275-285
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• 2020

Excavation usually induces considerable ground settlement in soft ground, which may result in damage of adjacent buildings. Generally, the settlement is predicted through elastic-plastic finite element method and empirical method with defects. In this paper, an analytical solution for predicting ground settlement induced by excavation is developed based on the definition of three basic modes of wall displacement: T mode, R mode and P model. A separation variable method is employed to solve the problem based on elastic theory. The solution is validated by comparing the results from the analytical method with the results from finite element method(FEM) and existing measured data. Good agreement is obtained. The results show that T mode and R mode will result in a downward-sloping ground settlement profile. The P mode will result in a concave-type ground settlement profile.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 봄 학술발표회 논문집
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• pp.141-148
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• 2000

In this study, differential settlements of adjacent structure and behaviour of ground during tunnel excavation and the effect of micropile installed to preserve differential settlement of structure are measured and analyzed by model test. In the test results, the effective range of reinforcement is suggested.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1990년도 PROCEEDINGS OF THE FIRST KOREA-JAPAN JOINT GEOTECHNICAL SEMINAR ON EXCAVATION and TUNNELING IN URBAN AREAS
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• pp.129-144
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• 1990

This paper is an introduction of measured samples of a peripheral ground displacement resulting from excavation work, and the work carried out to minimize the displacement of the earth retaining wall and the adjacent structures.