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Inversion of Surrounding Rock Mechanical Parameters in a Soft Rock Tunnel Based on a Hybrid Model EO-LightGBM
https://orcid.org/0000-0001-6369-4896
Abstract The mechanical parameters of the surrounding rock are the critical factors considered in the design and construction of tunnels, especially soft rock tunnels. The accuracy of obtained mechanical parameters of the surrounding rock will directly affect the stability evaluation of the tunnel and the rationality of the support structure design. Thus, this study proposes a hybrid model—LightGBM with an equilibrium optimizer (EO-LightGBM)—to invert the mechanical parameters of the surrounding rock based on the displacement values of the soft rock tunnel. And then, the EO-LightGBM model is used to invert the mechanical parameters of the actual engineering surrounding rock, and the mechanical parameters obtained by the inversion are input into the FLAC3D program for analysis and calculation. The calculated results are highly consistent with the actual deformation values, and the maximum average error is 6.03%, verifying the rationality and accuracy of the EO-LightGBM model further. In addition, this study discusses the applicability of the equivalent parameter calculation method for different support structures in tunnel support simulation. In summary, the study's findings can provide a reference for the support optimization design and inversion of surrounding rock mechanical parameters in soft rock tunnels.
Highlights Developed a hybrid model EO-LightGBM that can accurately invert the mechanical parameters of soft rock tunnel surrounding rock.The design method of surrounding rock mechanics parameters is comprehensive, and the parameter values are more reasonable.The reliability of the EO-LightGBM inversion model was further verified using actual tunnel engineering as an example.The equivalent parameter calculation methods of various supporting structures were discussed for tunnel engineering.
Inversion of Surrounding Rock Mechanical Parameters in a Soft Rock Tunnel Based on a Hybrid Model EO-LightGBM
https://orcid.org/0000-0001-6369-4896
Abstract The mechanical parameters of the surrounding rock are the critical factors considered in the design and construction of tunnels, especially soft rock tunnels. The accuracy of obtained mechanical parameters of the surrounding rock will directly affect the stability evaluation of the tunnel and the rationality of the support structure design. Thus, this study proposes a hybrid model—LightGBM with an equilibrium optimizer (EO-LightGBM)—to invert the mechanical parameters of the surrounding rock based on the displacement values of the soft rock tunnel. And then, the EO-LightGBM model is used to invert the mechanical parameters of the actual engineering surrounding rock, and the mechanical parameters obtained by the inversion are input into the FLAC3D program for analysis and calculation. The calculated results are highly consistent with the actual deformation values, and the maximum average error is 6.03%, verifying the rationality and accuracy of the EO-LightGBM model further. In addition, this study discusses the applicability of the equivalent parameter calculation method for different support structures in tunnel support simulation. In summary, the study's findings can provide a reference for the support optimization design and inversion of surrounding rock mechanical parameters in soft rock tunnels.
Highlights Developed a hybrid model EO-LightGBM that can accurately invert the mechanical parameters of soft rock tunnel surrounding rock.The design method of surrounding rock mechanics parameters is comprehensive, and the parameter values are more reasonable.The reliability of the EO-LightGBM inversion model was further verified using actual tunnel engineering as an example.The equivalent parameter calculation methods of various supporting structures were discussed for tunnel engineering.
Inversion of Surrounding Rock Mechanical Parameters in a Soft Rock Tunnel Based on a Hybrid Model EO-LightGBM
https://orcid.org/0000-0001-6369-4896
Abstract The mechanical parameters of the surrounding rock are the critical factors considered in the design and construction of tunnels, especially soft rock tunnels. The accuracy of obtained mechanical parameters of the surrounding rock will directly affect the stability evaluation of the tunnel and the rationality of the support structure design. Thus, this study proposes a hybrid model—LightGBM with an equilibrium optimizer (EO-LightGBM)—to invert the mechanical parameters of the surrounding rock based on the displacement values of the soft rock tunnel. And then, the EO-LightGBM model is used to invert the mechanical parameters of the actual engineering surrounding rock, and the mechanical parameters obtained by the inversion are input into the FLAC3D program for analysis and calculation. The calculated results are highly consistent with the actual deformation values, and the maximum average error is 6.03%, verifying the rationality and accuracy of the EO-LightGBM model further. In addition, this study discusses the applicability of the equivalent parameter calculation method for different support structures in tunnel support simulation. In summary, the study's findings can provide a reference for the support optimization design and inversion of surrounding rock mechanical parameters in soft rock tunnels.
Highlights Developed a hybrid model EO-LightGBM that can accurately invert the mechanical parameters of soft rock tunnel surrounding rock.The design method of surrounding rock mechanics parameters is comprehensive, and the parameter values are more reasonable.The reliability of the EO-LightGBM inversion model was further verified using actual tunnel engineering as an example.The equivalent parameter calculation methods of various supporting structures were discussed for tunnel engineering.
Inversion of Surrounding Rock Mechanical Parameters in a Soft Rock Tunnel Based on a Hybrid Model EO-LightGBM
Sun, Junlong (author) / Wu, Shunchuan (author) / Wang, Han (author) / Wang, Tao (author) / Geng, Xiaojie (author) / Zhang, Yanjie (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
Inversion Study of Mechanical Parameters of Tunnel Surrounding Rock Based on Similar Test
| DOAJ | 2023