Ranking and transformation error assessment of shear strength parameters correlations

Waled Daoud, Kiyonobu Kasama, Naser Saleh, Abdelazim Negm

研究成果: Contribution to journalArticle査読

抄録

Shear strength is responsible for soil ability to withstand applied loads and considered the most important engineering properties of soil. Shear strength can be measured directly in the field or in the laboratory, however many empirical correlations were developed to predict shear strength from simple basic and index properties of soil. The main reasons for using these correlations that direct measurements are costly, time consuming, and not always applicable. The correlated shear strength parameter deviates from its actual value, by a transformation error, causing larger uncertainty that affects the overall design. The current commonly used transformation error values have shortcomings that warrant the need for further research. To offer avenues for improving the current values, a database contains geotechnical investigation results for 5087 boreholes collected from Egypt, UAE, Iraq, and Indonesia were created. The database served to assess inherent variability, measurement error, and transformation error more consistently. The most commonly used empirical correlations were ranked based on amended Theil inequality coefficient method, then the transformation error was determined using uncertainty propagation combined with the second moment probabilistic method (RUP-SMP). The adapted methodology can be used as standard procedures to evaluate different empirical correlations for other geotechnical properties. Framework for combining the predicted transformation error with other uncertainties was introduced to determine the overall uncertainty in shear strength parameters.

本文言語英語
論文番号14
ジャーナルInternational Journal of Geo-Engineering
7
1
DOI
出版ステータス出版済み - 12 1 2016

All Science Journal Classification (ASJC) codes

  • 地盤工学および土木地質学
  • 材料力学
  • エネルギー(その他)

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