论文部分内容阅读
根据台阶法施工隧道的围岩变形特点与隧道位移监测的实际需要提出一种公路隧道围岩变形预测模型,即断面开挖后两周以内利用四维新陈代谢GM(1,1)模型进行短期预测,该期间通过控制每天变形量以达到指导开挖与支护的目的;两周以后利用回归分析法进行远期预测与最终位移量预测,该期间主要通过控制最终下沉量以达到指导开挖与支护的目的。结合京化高速黄羊山3号隧道的实际监测数据利用模型中的两种预测方法进行预测,预测结果证实了本模型的合理性和可行性。
According to the deformation characteristics of surrounding rock of tunnel construction method and the actual need of tunnel displacement monitoring, a prediction model of surrounding rock deformation of highway tunnel is proposed, that is, short-term prediction of four-dimensional metabolism GM (1,1) model within two weeks after excavation, During this period, the purpose of guiding the excavation and support is controlled by controlling the deformation per day. Two weeks later, the long-term prediction and the final displacement prediction are performed by regression analysis. During this period, the ultimate settlement is controlled mainly to guide the excavation and The purpose of support. Combined with the actual monitoring data of No.3 tunnel of Huangyangshan in Beijing-Huhua Expressway, two prediction methods in the model are used to predict the prediction results. The prediction results confirm the rationality and feasibility of this model.