지반정수의 변동성 추정 및 결과의 활용Estimation of Variability of Soil Properties and Its Application to Geotechnical Engineering Design
- Other Titles
- Estimation of Variability of Soil Properties and Its Application to Geotechnical Engineering Design
- Authors
- 김동휘; 김민태; 이창호; 이우진
- Issue Date
- 2010
- Publisher
- 한국지반공학회
- Keywords
- Characteristic value; Coefficient of variation; Confidence interval; Probabilistic analysis
- Citation
- 한국지반공학회논문집, v.26, no.12, pp.71 - 79
- Indexed
- KCI
- Journal Title
- 한국지반공학회논문집
- Volume
- 26
- Number
- 12
- Start Page
- 71
- End Page
- 79
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/117677
- ISSN
- 1229-2427
- Abstract
- The reliable evaluation of the coefficient of variation (COV) of soil properties is required for the determination of adequate design values and the application of a probabilistic method for the design of geotechnical structures. In this paper, the applicability of methods for estimating the standard deviation, such as the Three-Sigma Rule and a statistical method, is evaluated by using site investigation data of the Songdo area. It is found that the Three-Sigma Rule provides similar results to those of a statistical method when using Nσ=6 for the property with small variability and Nσ=4.2~5.3 for the property with large variability. It is also observed that, for the undrained shear strength that has an increasing trend with depth, a Nσ value of 4 is adequate for the evaluation of the variability by the Three-Sigma Rule. The COVs of soil properties determined in this paper could be used in the estimation of the confidence interval and characteristic values of soil properties.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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