小样本条件下江苏软土路基回弹模量的贝叶斯估计-基于静力触探数据与高斯过程回归的建模分析

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.