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通过分析隧道围岩的收敛变形特征,基于宴家隧道典型断面开挖过程中的实测围岩收敛变形数据,建立了宴家隧道围岩收敛变形预测GM(l,l)灰色模型。结果表明:采用GM(l,l)灰色系统模型能较好地反映围岩收敛短期数据的变化规律,是对围岩收敛进行短期预测的一种有效方法。当添加实测的新数据,实时更新GM(1,1)模型后,可以提高运用GM(l,l)灰色系统模型预测围岩变形预测的时效性及预测精度,从而成为预测围岩变形的一种更为有效的方法。
By analyzing the characteristics of convergence and deformation of the surrounding rock of the tunnel, a gray (GM (l, l)) model for predicting the convergence and deformation of the surrounding rock of the feijia tunnel was established based on the measured data of surrounding rock deformation during the excavation of the typical section of the feast tunnel. The results show that using GM (l, l) gray system model can better reflect the variation of short-term data of surrounding rock convergence is an effective method for short-term prediction of surrounding rock convergence. When GM (1,1) model is updated in real time by adding the measured new data, the GM (1,1) gray system model can be used to predict the timeliness and prediction accuracy of the surrounding rock deformation prediction and thus become a A more effective method.