In order to evaluate the influence of anchor cavity excavation on the overall stability of the front slope of Lvzhijiang Large Bridge tunnel,a FLAC3D numerical analysis model was established to simulate the static effect and blasting dynamic effect of tunnel anchor cavity excavation.The design load of main cable is applied to the model to simulate the distribution of stress,displacement and plastic zone of surrounding rock.The results show that the stability coefficient of the tunnel front slope is 1.35 under the condition of rainfall and the excavation of the left tunnel anchor cavity.The stability coefficient of the tunnel front slope is 1.29 under the rainfall condition and the design load of the main cable.The surrounding rock of the tunnel front slope is in a safe and stable state under the most unfavorable load condition during the excavation of the tunnel anchor cavity.
关键词
高速公路/隧道式锚碇/高陡仰坡/洞室开挖/稳定性评价
Key words
highway/tunnel anchorage/high and steep front slope/cavity excavation/stability evaluation
维普
万方数据