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A Rock Mass Strength Prediction Method Integrating Wave Velocity and Operational Parameters Based on the Bayesian Optimization Catboost Algorithm

  • Tunnel Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Tunnel Boring Machines (TBMs) have been the main equipment for tunneling and underground construction due to their high safety performance and tunneling efficiency. However, the unknown and changing geological conditions during construction pose a challenge to TBM construction. As one of the essential parameters of rock properties, accurate acquisition of uniaxial compressive strength (UCS) is crucial for TBMs to adapt to changing ground conditions in a timely manner. Therefore, this study proposes a Catboost intelligent model based on Bayesian Optimization to predict UCS. Rock mass are velocity information and key TBM operational parameters are used as model input variables. The Gaussian data augmentation method is used to compensate for the difficulty of obtaining field data in large quantities. The Zhujiang Delta Water Resources Allocation Engineering field data are used in the model, and the obtained evaluation indicators MAPE, RMSE, VAF and a20-index are obtained as 9.91%, 499.38 MPa, 90.7% and 0.95, respectively. In addition, another project is selected to verify the applicability of the model. The validation results also confirm that the model is valid and reliable when applied to practical engineering.

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Acknowledgments

The authors wish to thank Sinohydro Bureau 14 Company Limited and China Railway Tunnel Stock Company Limited for sharing their experiences of data gathering efforts in the field. This research is supported by the National Natural Science Fund of China (No. 52021005, 51991391), the Key Research and Development Plan of Shandong Province (No. 2020ZLYS01), the Natural Science Foundation of Shandong Province (No. ZR202103010903).

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Correspondence to Hongyi Cao.

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Wang, Y., Wang, R., Wang, J. et al. A Rock Mass Strength Prediction Method Integrating Wave Velocity and Operational Parameters Based on the Bayesian Optimization Catboost Algorithm. KSCE J Civ Eng 27, 3148–3162 (2023). https://doi.org/10.1007/s12205-023-2475-9

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  • DOI: https://doi.org/10.1007/s12205-023-2475-9

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