| This paper takes the western end of the Wufengshan tunnel in the Enshi area as its research background,conducts a wide range of investigations and research on the subject,and based on a large amount of domestic and foreign relevant data and literature,it has mainly done the following work:(1)Firstly,the basic factors affecting the stability of the slope at the side of the tunnel and the failure mechanism of the slope at the tunnel entrance under static and dynamic forces are summarized.The rock vibration effect and stress wave theory and the determination of the stability of the slope at the side of the tunnel are analyzed.(2)This paper briefly describes the basic situation of the project relying on the Wufengshan Tunnel.Through on-the-spot monitoring of the slope at the west end of the Wufengshan tunnel,the seismic velocity and main frequency data were obtained.Using regression analysis,the values of K and α were obtained,which provided a certain reference for future projects.(3)GTS NX software was used to establish a model based on the west door of Wufengshan tunnel.The dynamic characteristics and vibration law of the slope under the action of blasting load were analyzed and summarized by several working conditions such as the change of the horizontal distance and the change of slope height.Through numerical calculation and monitoring data analysis,the feasibility of numerical simulation method was verified.(4)Using the finite element software to calculate the stability of the slope and the upward slope of the project,the stability factor,the safe vibration speed and the limit vibration velocity,and the stability of the slope at the various stages of the construction of the slope under the action of the blasting vibration wave are obtained.The coefficient provides construction reference for this project and similar projects. |
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