Study And Evaluation On The Effect Of High Pressure Jet Grouting Pile Construction And Earth Excavation On Bearing Capacity Of Existing Bridge Foundation

The construction and excavation of high pressure jet grouting pile will inevitably cause disturbance to the soil around the pile when it is on or below the existing bridge.It will easily cause the buildings nearby deformation and even destroy.Therefore,In order to study the effect of road and channel construction on the bridge structure,the model based on a specific bridge is established and the results are analyzed by using Midas software.The main work includes:(1)The bridge body is modeled by the software,and the numerical calculation method is used to solve the structural displacement and stress increment of the bridge,and the results are analyzed.(2)Combined with the calculation results of the finite element,the impact of the high pressure rotary jet pile on the pier after the completion of the construction is evaluated,and the construction suggestions are given.The calculation results show that the risk of the construction of high pressure jet grouting pile and earthwork excavation under construction of the bridge has controllable risk in engineering.Specific examples,De Fu Road and No.4 channel beneath the Gaozan bridge,the basic controllable risk of bridge engineering.