Analysis on Intelligent Inversion of SSA-KELM Model for Surrounding Rock Parameters of Mountain Tunnel
In order to ensure that the mechanical parameters of tunnel surrounding rock are reasonable and reliable,a new intelligent inversion model of tunnel surrounding rock parameters based on FSSA-KELM model is proposed.The intelligent model is applied to the inversion of the mechanical parameters of the surrounding rock in the left line section of Yangzong Tunnel on Fude-Yiliang Expressway.The displacement value of the surrounding rock is calculated forward in FLAC3D numerical simulation software based on the measured value of the tunnel deformation on site,and is compared with the measured value on site.The results show that SSA algorithm optimizes the regularization parameter C and kernel function of the KELM model,significantly improving the computational accuracy of the model.The relative error of the SSA-KELM model in calculating the deformation of tunnel surrounding rock is less than 4%,which is much lower than that of the ELM model and BP model,indicating that the SSA-KELM model has more accurate inversion results and stronger practicality.
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