농업과학연구 (Korean Journal of Agricultural Science)
- 제27권1호
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- Pages.39-47
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- 2000
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- 2466-2402(pISSN)
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- 2466-2410(eISSN)
현장계측치로부터 역산한 압축지수와 압밀계수의 평가 방법
Evaluation Methods of Compression Index and the Coefficient of Consolidation by Back Analysis of Settlement Data
- Lee, Dal Won (Dept. of Agricultural Engineering, College of Agriculture, Chungnam National University) ;
- Lim, Seong Hun (Dept. of Agricultural Engineering, College of Agriculture, Chungnam National University) ;
- Kim, Ji Moon (Dept. of Agricultural Engineering, College of Agriculture, Chungnam National University)
- 발행 : 2000.06.30
초록
본 연구는 연약지반의 심도가 갚으면서 압밀침하량이 큰 지역에서 연직드레인 공법에 의하여 개량한 지반의 침하거동을 파악하고, 현장계측결과를 기초로 기존의 최종침하량의 예측방법과 현장계측치로부터 역산한 압축지수와 압밀계수의 범위를 실내시험과 비교분석 한 것으로 본 연구 대상지역에서 얻은 결과를 요약하면 다음과 같다. 1. 최종침하량 예측방법에 의하여 구한 최종예상침하량은 쌍곡선 방법이 가장 크고, Asaoka 방법과 Curve fitting 방법은 유사하게 나타났으며, 타입간격이 좁을 경우에는 교란영향을 고려한 설계가 검토되어야 할 것으로 판단된다. 2. 실측압밀도(
A large scale field test of prefabricated vertical drains is performed to analyze the effect of parameters of the very soft clay at a test site. Compression index and the coefficient of horizontal consolidation obtained by back-analysis from the settlement data were compared with those obtained by means of laboratory tests. The Hyperbolic, Asaoka's and The Curve fitting methods are used to estimate final settlements and coefficients of consolidation. 1. Final settlement predicted with the Hyperbolic method was the largest, and the settlements predicted with the Asaoka's and the Curve fitting methods were nearly the same range, and it was concluded that smear effect has to be considered on design in the case that spacing of drains is small 2. The relationships of the measured consolidation ratio (Urn) and the designed consolidation ratio(
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