Systematic Transformation Error in the Depth-Average Undrained Shear Strength

Systematic Transformation Error in the Depth-Average Undrained Shear Strength

van der Krogt, M.G. (TU Delft Hydraulic Structures and Flood Risk)
Schweckendiek, T. (TU Delft Hydraulic Structures and Flood Risk)

Ching, Jianye (editor)
Li, Dian-Qing (editor)
Zhang, Jie (editor)

2019-12

In this paper we show how to calibrate a site-specific transformation model to measure the undrained shear strength from CPTs. This practically unbiased transformation model can then be used to make a better estimation of the spatial average parameter, such as the depth-average of a soil layer in a homogenous deposit, using less costly indirect measurements. We show that there is a considerable difference in terms of characteristic value and probability density, between the assumptions of entirely random or systematic transformation uncertainty. Ultimately we show what the effect is of making more realistic choices for the random and systematic part in the transformation uncertainty for a case study with actual data.

Site investigation
spatial average
undrained shear strength
transformation error
random error
systematic error

http://resolver.tudelft.nl/uuid:cd8c1c4e-9f9e-44f7-8ad1-a9e7708dd9f5

Research Publishing

978-981-11-2725-0

Proceedings of the 7th International Symposium on Geotechnical Safety and Risk (ISGSR)

ISGSR 2019: 7th International Symposium on Geotechnical Safety and Risk, 2019-12-11 → 2019-12-13, National Taiwan University of Science and Technology, Taipei, Taiwan

Institutional Repository

conference paper

© 2019 M.G. van der Krogt, T. Schweckendiek