基于TCN-BiGRU-Transformer模型的双护盾TBM掘进速度预测研究

Prediction of Double Shield TBM Tunnelling Speed Based on TCN-BiGRU-Transformer Hybrid Model

  • 摘要: 针对TBM掘进速度预测中单一模型特征提取能力有限、预测精度不足等问题,提出一种基于TCN-BiGRU-Transformer多模块融合的TBM掘进速度智能预测模型。通过融合时域卷积网络(TCN)的多尺度特征提取能力、双向门控循环单元(BiGRU)的长时序依赖建模优势及Transformer的自注意力机制,实现对双护盾TBM掘进速度的精准预测。以鄂坪调水TBM隧洞工程为例,选取TBM完整掘进循环上升段的总推力、刀盘扭矩、刀盘转速和掘进速度作为输入特征,采用STL分解数据增强方法构建包含3 308组样本的数据集,进而预测TBM稳定段的掘进速度。结果表明:TCN-BiGRU-Transformer模型的R2最大(0.962 6),MAEMAPE最小(2.18 mm/min和4.18%),显著优于对比模型。同时,模型在不同围岩等级下均能保持较高的预测精度,其R2均大于0.95,验证了多模块融合架构在提高TBM掘进速度预测精度方面的有效性及在复杂地质条件下的适应性。

     

    Abstract: To address the limitations of single models in feature extraction and prediction accuracy for tunnel boring machine (TBM) advance rate prediction, this study proposes an intelligent prediction model based on a TCN-BiGRU-Transformer multi-module fusion architecture. By integrating the multi-scale feature extraction capability of temporal convolutional networks (TCN), the long-term sequential dependency modeling advantage of bidirectional gated recurrent units (BiGRU), and the self-attention mechanism of Transformer, the model achieves precise prediction of the advance rate for double-shield TBMs. Using construction data from the Eping Water Diversion TBM tunnel project, input features including total thrust, cutterhead torque, cutterhead rotation speed, and advance rate during the rising phase of a complete TBM excavation cycle were selected. A dataset containing 3,308 samples was constructed using STL decomposition for data augmentation to predict the stable-phase advance rate. The results demonstrate that the TCN-BiGRU-Transformer model achieves the highest prediction accuracy, with an R2 of 96.26%, and the lowest errors, with MAE and MAPE values of 2.18 mm/min and 4.18%, respectively, significantly outperforming comparative models. Furthermore, the model maintains high prediction accuracy across different rock mass grades, with R2 consistently exceeding 95%, validating the effectiveness of the multi-module fusion architecture in improving TBM advance rate prediction and its adaptability to complex geological conditions. The research findings provide technical support for intelligent TBM-assisted Tunnelling and hold significant implications for tunnel construction under challenging geological conditions.

     

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