Application Research On Monitoring And Management System Of Bank Deformation Of Jinsha River Bridge On Lixiang Railway

The Jinsha River Steel Truss Suspension Bridge,which is under construction,spans the Tiger Leaping Gorge of the Jinsha River.Tectogenesis in this construction area can be observed frequently.The main pier on the Shangri-La shore has endured bad effect caused by Beryllium plant 2# Fault,so earthquake and rainstorms may induce the bank failure.Therefore,the stability of the bridge bank slope is the key factor that determines the safe process from construction to operation.In order to ensure the successful completion of the construction project and feedback effective warning information during the construction process,this thesis has designed the Monitoring and Management System of Bank Deformation of Jinsha River Bridge,which integrates catching the data of slope deformation,analyzing and determining the state of bank slope.The main research contents are as follows :(1)Field investigation to obtain regional engineering geological condition of the bridge site,according to the characteristics of the bank slope,“displacement-monitoring” is decided to be the main measure to estimate the stability of the slope.Considering the construction scheme,the plane and vertical network of monitoring points have been setted up,eventually the displacement of the deformation can be gotten in real time.(2)The cumulative displacement,deformation acceleration and the tangent angle of the displacement sequence curve of critical points have been chosen as the criterion of instability,and those critical values are determined respectively based on the Slope Case-based reasoning and relative engineering codes,so multiple warning thresholds are used to analyze the slope stability.(3)Based on widely-used digital methods in slope deformation analysis,the influence,which caused by Window Mobile Method and Wavelet,to prediction accuracy of Grey System and Back Propagation has been found out,using the former displacement of deformation as data sample.Then the optimal combination of analysis algorithms toward to different deformation period can be obtained,this comparison has improved the applicability of the analysis algorithms to the slope deformation prediction in a way.(4)Monitoring and Management System of Bank Deformation of Jinsha River Bridge has been developed based on database technology,communication protocols and.Net Framework4.5.In this system,displacement of deformation is transferred to native database after collected by lower computer,then the client accesses the database through ADO.NET to call algorithms to estimate deformation,simultaneously to achieve long-term monitoring and medium-term early-warning functions.