MENG Chao,GAO Zhihua,HUANG Juehao,et al.Sensitivity analysis and inversion of HSS model parameters for soft soil layers on the first terrace of the Yangtze River[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(03):139-147.
MENG Chao,GAO Zhihua,HUANG Juehao,et al.Sensitivity analysis and inversion of HSS model parameters for soft soil layers on the first terrace of the Yangtze River[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(03):139-147. DOI: 10.13471/j.cnki.acta.snus.ZR20240264.
Sensitivity analysis and inversion of HSS model parameters for soft soil layers on the first terrace of the Yangtze River
Based on a deep foundation pit project in Wuhan,we establishe a numerical model using the PLAXIS 2D, analyze the sensitivity of HSS model parameters for cohesive and sandy soils, evaluate the sensitivity of soft soil layers in the first terrace of the Yangtze River, and invert the significantly sensitive parameters. Firstly, the sensitivity analysis of certain parameters of the HSS model for cohesive and sandy soils is conducted, focusing on the parameters that most significantly affect the settlement of the tunnel crown. Then, the sensitivity analysis of the soft soil layers in the first terrace of the Yangtze River is carried out to determine the soil mechanical parameters to be inverted. Finally, combining the existing tunnel crown settlement monitoring data, the inversion of the soil mechanical parameters to be inverted is conducted using a deterministic forward-inverse method.The results show that for both cohesive and sandy soils, the parameter that most significantly affects the tunnel crown settlement is the small-strain
). In the soft soil layers of the first terrace of the Yangtze River, the layers that significantly affect the deformation of the existing tunnel are the silty fine sand layer and the fine sand layer. The inverted
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