Prediction of Compulsory Replacement Depth by Empirical Method

Based on the previous studies proposed by many researchers about the evaluation method of replacement depth, a modified formula which incorporates the effect factors such as embanked height and load, replacement depth, cohesive force of original ground and unit weight of embankment etc, was suggested in this study. The new proposed formula was applied in the three construction sites of Kwangyang-Bay Area (Yeocheon, Youlchon, and Kwangyang) constructed by the compulsion replacement method. The application of the new method was investigated through these case studies in domestics. A modified bearing capacity parameter was estimated form the relationship of modified embankment loading and ultimate bearing capacity resulted from the site investigation, and the replacement depth was predicted by using this parameter. In addition, through the relationship analyses between each effect factors to the replacement depth in two areas, Yeocheon and Youlchon, an empirical prediction method which can evaluate the replacement depth in adjoining area was proposed. The predicted value obtained by new method is approximately similar to the measured replacement depth in Kwangyang area.

경험적인 방법에 의한 강제치환 심도 예측

본 연구에서는 기존에 제안된 각 연구자들의 치환심도 산정식을 고찰하고, 이를 토대로 영향인자를 고려한 수정식을 제안하였으며, 제안된 수정식을 국내 대표적인 강제치환 시공 사례지역인 남해안 광양만일대(여천, 율촌, 광양)의 시공사례에 적용하여 국내지반에서의 적용성을 조사하여 보았다. 또한 지반조사 결과를 바탕으로 산정된 수정성토하중과 극한지지력의 관계로부터 수정지지력계수를 결정하였으며, 결정된 수정지지력계수를 적용하여 치환심도를 예측하였다. 그리고 율촌, 여천지역의 시공시 각 영향인자별 상관성 분석을 통한 상호관계를 유도함으로서 인접지역 또는 유사지 역에서 치환심도를 예측할 수 있는 경험적 인 치환심도 예측기법을 제안하였고, 제안된 경험식을 광양지 역에 적용한 결과 예측결과는 실제 치환심도와 매우 근사한 결과를 나타내었다.