【摘要】 高寒区隧道衬砌结构所处的服役环境通常都较恶劣，容易受各种极端因素的耦合影响，导致衬砌混凝土产生不同形式的裂缝，给隧道结构带来了较大的安全隐患，因此对于高寒区隧道衬砌结构开裂行为的监测和预测具有重要工程意义，故提出了基于深度学习的高寒区隧道衬砌应变多因素耦合预测模型。以新疆某高寒区隧道为依托工程，以LSTM模型为基础，构建了一种CNN-Bilstm-Transformer （CBLT）多因素耦合预测模型；基于大量现场监测数据对CBLT进行了训练与测试，探究了不同输入特征对模型预测性能的影响，并对比分析了CBLT与不同模型之间的预测性能。结果表明：随着输入特征的完善，CBLT的预测性能也逐渐提高，在测试集上的均方根误差(δ_RMSE)、平均绝对误差(δ_MAE)、平均绝对百分比误差(δ_MAPE)仅有2.61με、2.22με和1.24%,R²可达0.815,且预测性能优于RNN、LSTM、CNN-Bilstm和Bilstm-Transformer;将CBLT应用于实际工程中的衬砌开裂行为预测，取得了较高的精度。研究成果可为高寒区隧道衬砌开裂行为分析和冻害防治提供理论指导。更多还原

【Abstract】 The service environment in which the lining structure of tunnels in high cold regions was usually harsh and susceptible to the coupling effects of various extreme factors, leading to different forms of cracks in the lining concrete and posing significant safety hazards to the entire tunnel structure. Therefore, monitoring and predicting the cracking behavior of tunnel lining structures in high cold regions has important engineering significance, so, a multi-factor coupling prediction model for tunnel lining strain in cold regions based on deep learning is proposed. Firstly, a CNN-Bilstm-Transformer(CBLT) multi-factor coupling prediction model was developed based on the LSTM model, using a high cold region tunnel of Xinjiang as a supporting project. Then, based on a large amount of on-site monitoring data, CBLT was trained and tested to explore the influence of different input features on the model’s predictive performance, and the predictive performance between CBLT and different models was compared and analyzed. The research results indicate that: With the improvement of input features, the predictive performance of CBLT gradually improves; the average RMSE, MAE and MAPE on the test set were only 2.61 με, 2.22 με and 1.24%, R~2 can reach 0.815; the predictive performance of CBLT is better than RNN, LSTM, CNN-Bilstm and Bilstm-Transformer. The application of CBLT in predicting lining cracking behavior in practical engineering could achieve high accuracy. The research results can provide scientific guidance for the analysis of cracking behavior of tunnel lining in high cold regions and the prevention of frost damage.更多还原