Study On The Displacement Characteristics By Construction Disturbance Of Metro Deep Foundation Pit Considering Dynamic Effect Of Vehicles

The high urbanization process of china leads to rapid increase of MRT.Considering the convenience of people,the MRT station usually near the busy road.It is a question that whether the vehicle load will affect the excavation of deep foundation pit and how to evaluate the impact.Now the vehicle load is considered in load standards in the form of static load,actually vehicle load is a dynamic load which changes with time.The main work of this paper are as follows:(1)A FEM model was established to evaluate the displacement of lateral wall,the settlement of ground,the bottom heave and the supporting stress under vehicle dynamic loads.(2)The displacement of lateral wall,the settlement of ground,the bottom heave and the supporting stress under different load conditions were compared,the results show that on the road side,lateral wall displacement and ground settlement under vehicle dynamic load were bigger;on the other side,the results turn to be smaller.(3)The comparison research on monitoring data and numerical simulation show that the results of numerical simulation considering vehicle loads were in good agreement with monitoring results.