复杂地层盾构掘进速率和刀盘扭矩预测模型及其地层适应性研究

以复杂地层地质分段为基础，统计不同地质分段的盾构掘进参数，开展针对盾构掘进速率与刀盘扭矩的多元回归分析，得到适用于复杂地层的掘进参数回归模型，并分析回归模型系数与全断面等效岩体基本质量指标间的相关性。研究表明： 全断面等效岩体基本质量指标考虑了复杂地层中不同区段掌子面内各地层面积占比差异，可作为地质分段标准； 掘进速率与刀盘扭矩的回归预测值与实测值间相对误差较小，回归模型对均质地层及复合地层均有较好的拟合精度； 围岩等级提高时，掘进速率、刀盘扭矩回归模型系数具有明显的分段变化特征。其量化结论可用于定量预测不同地层盾构掘进参数，以提高盾构施工效率。

Prediction Models of Advancing Speed and Cutterhead Torque of Shield  Tunneling in Complex Strata and Its Adaptability to Strata

In this paper, the shield tunneling parameters in different geological sections are summarized; the multiple regression analysis is made on advancing speed and cutterhead torque of shield; the regression model of shield tunneling parameters in complex strata is obtained; and the relationship between parameters of regression models and the full face equivalent basic quality index of rock mass is studied. The study results show that: 1) The full face equivalent basic quality index of rock mass with consideration of proportion of different geological conditions can take as standards for geological sectioning. 2) The difference between predicted advancing speed and cutterhead torque of shield and measured data is little. The regression models have a good adaptability to homogeneous or complex strata. 3) The parameters of regression models, shield advancing speed and cutterhead torque, have obvious sectioned characteristics when the surrounding rock grade increases. The quantified results can be applied to predict shield advancing parameters in different strata and improve shield tunneling efficiency.