Deformation Monitoring Of Gravity Wharf Based On GPS Positioning Technology And Numerical Simulation Analysis

Gravity wharf is a kind of common hydraulic structures. Damage and failure phenomenon appears inevitably because of the long term exterior environmental load impact. Therefore, the deformation monitoring is the effective measure to avoid major accidents in the operation of the gravity wharf. This article, the engineering background of which is the gravity wharf at a certain port in Hangzhou, mainly discusses the feasibility of the GPS positioning technology applied in the deformation monitoring in gravity wharf with theoretical analysis, field monitoring and numerical simulation. And the main research contents are listed as follows:(1) Description of the features, structure component and its structure type of the gravity wharf as well as the load condition and the damage mechanism of wharf structure.(2) Introduction the characteristics and positioning principle of the GPS technology with the error source and influence rules in real monitoring. Further more, the monitoring regulation of the port is also studied to help summarize the problems in the layout of the GPS in monitoring network, data collection and processing and so on.(3) Comparison of the monitoring data from GPS technology named three phases of horizontal displacement and the conclusion of the horizontal displacement laws. The research indicates that during the monitoring period, only the No.3and the No.4’displacement along north-south of the nine monitoring points in gravity wharf are more than tolerance while others are stable. However, those two points get steady through time.(4) The comparison between the horizontal displacement, the calculation results caused by the combined action of mechanical load、cargo load, water load and so on basing the numerical simulation method, and the real GPS monitoring data indicates that these two results are basically the same, which verifying the reasonability and scientific of finite element analysis and the credibility of GPS monitoring results. Further study on the influence, mechanical load, cargo load as well as the cargo range, on the horizontal displacement of retaining wall shows that it is the mechanical load that makes the greatest impact.