초록

AI-Helper

준설매립지의 현장계측결과에 의하면 실제의 자중압밀 침하량은 실내시험결과를 근거로한 설계치보다 작게 평가되고 있다. 이러한 원인중의 하나를 본 연구에서는 준설재료의 퇴적시 압축성의 저감에 의한 것이며 더욱이 이러한 시간효과는 펌프준설매립지와 같이 저응력범위의 압밀특성에서는 고려되고 있지 않는 실정이다. 본 논문에서는 준설점성토의 압축성에 대한 시간효과를 파악하기 위하여 퇴적된 공시체에 침투력을 작용시켜 일련의 침투압밀시험을 수행하였다. 또한 본 연구에서와 같이 초기함수비가 큰 경우에 발생하는 압밀해의 불안정성을 극복하기 위하여 예측자-수정자법을 이용한 유한차분에 석기법을 제시하였고 실험결과와 비교하여 좋은 결과를 얻었다. 최종적으로 준설점성토의 압축성은 자중압밀시간에 의존되고 있음이 관찰되었다.

Abstract ▼ AI-Helper

According to the field measurement of dredging-reclaimed land, the actual self-weight consolidation settlement has been frequently reported to be less than the predicted values based on the laboratory tests results. The author estimates that one of the reasons is the reduction of the compressibility...

According to the field measurement of dredging-reclaimed land, the actual self-weight consolidation settlement has been frequently reported to be less than the predicted values based on the laboratory tests results. The author estimates that one of the reasons is the reduction of the compressibility due to the sedimentation of the dredging material, Furthemore, the aging effect is ignored in the consolidation characteristics of the very low stress range as a pump dredging-reclaimed land. In this paper, a series of seepage consotidation tests has been carried out by applying the seepage force to the specimen prepared by sedimentation in consolidmeter in order to clarflfy the aging-effect on the compressibility of dredging clayey soil, Also, with a view to overcome unstable consolidation solution occurring in the case where the initial water content is higher as pumpdredging reclaimed land, the finite difference analysis technique using predictorforrector method is suggested that it gets good agreement with ezperimental results. Finally, the compressibility of the dredging clayey soil is depended on self-weight consolidation time.