Bayesian estimation of resilient modulus of Jiangsu soft soils from sparse data—Gaussian process regression and cone penetration test data-based modelling and analysis

ZHAO Teng-yuan; SONG Chao; HE Huan

doi:10.11779/CJGE2021S2033

Volume 43 Issue S2

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Chinese Journal of Geotechnical Engineering > 2021 > 43(S2): 137-141. > DOI: 10.11779/CJGE2021S2033

ZHAO Teng-yuan, SONG Chao, HE Huan. Bayesian estimation of resilient modulus of Jiangsu soft soils from sparse data—Gaussian process regression and cone penetration test data-based modelling and analysis[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 137-141. DOI: 10.11779/CJGE2021S2033

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Bayesian estimation of resilient modulus of Jiangsu soft soils from sparse data—Gaussian process regression and cone penetration test data-based modelling and analysis

1.
School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2.
School of Transportation, Southeast University, Nanjing 211189, China

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Received Date: August 17, 2021
Available Online: December 05, 2022

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Abstract

Abstract

A Gaussian process regression (GPR)-based model for predicting the resilient modulus of Jiangsu soft soils is developed based on the complied database for Jiangsu soft soils in literatures. The model takes the cone penetration test (CPT) data (e.g., tip resistance q_c data, and sleeve friction f_s data), water content and dry unit weight of soft soils as the input, while provides the predicted resilient modulus as well as quantified uncertainty as the output. By comparing with some conventional machine learning methods, the GPR model can reasonably reflect the correlation between the resilient modulus and the other geotechnical parameters of Jiangsu soft soils. Besides, the GPR model can achieve good performance even when the number of the training dataset is small, which is validated in this study in terms of effectiveness, efficiency and robustness. The GPR method can be considered as a new way for the probabilistic and non-parametric estimation of the resilient modulus of Jiangsu soils.
- deformation of soft soil,
- non-parametric estimation,
- Gaussian process regression,
- sparse data,
- site characterization,
- cone penetration test

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