Evaluation on Effectiveness of Prestressed Anchor Cable Reinforcement Based on Seismic Action in Tunnel Mouth Excavation
Taking Persimmon Garden Tunnel as the research object,this paper analyzes and evaluates the effectiveness of prestressed anchor reinforcement based on seismic action in tunnel mouth excavation.The results show that with the excavation of the tunnel,the safety factor decreases,and the safety factor decreases to 1.2611,which means that the internal stress distribution state of the slope is changed by the excavation of the cave,resulting in the decrease of slope stability factor.The anchor cable is used to pre-reinforce the side slope,and the safety factor of the slope is increased compared with before,and the construction safety and stability are guaranteed.After the completion of the reinforcement measures,the structural deformation rate and other values are within the control range,and the deformation in the cave tends to be stable.The reinforcement measures have a certain reinforcement effect,which can improve and ensure the stability and safety of tunneling construction.
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