Abstract
In this study, an evaluation method is proposed for the spatial variability of the soil strength derived from the results of cone penetration tests (CPTs) conducted inside an earth-fill dam composed of mixed materials with different particle size distributions. First, in order to reduce the influence of outliers, which have high values or low values, on the modeling of the random field, the measured values are divided into outliers and the others, namely, high, middle, and low groups, respectively. Second, a statistical model is determined for each of the three groups, and the spatial variability of the soil strength considering the outliers is evaluated based on the simulation results of the three groups. The novelty of the approach exists in the re-composition of the simulated values of the three groups. In the proposed method, the measured values are statistically modeled, including the spike-like distribution affected by the outliers. Finally, the estimated values obtained by the proposed method and the measured values are compared at the same location to confirm their correspondence. As a result, it is verified that the proposed method can be used to reasonably simulate the spatial variability of the soil strength inside an earth-fill dam considering outliers.
Original language | English |
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Publication status | Published - 2020 |
Event | 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 - Taipei, Taiwan, Province of China Duration: Oct 14 2019 → Oct 18 2019 |
Conference
Conference | 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 |
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Country/Territory | Taiwan, Province of China |
City | Taipei |
Period | 10/14/19 → 10/18/19 |
Keywords
- Cone penetration test
- Earth-fill dam
- Geostatistical method
- Outliers
- Semi-variogram
- Spatial variability
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology