Research On Safety Monitoring Relating Management System Of Concrete Facing Rockfill Dam

In this thesis, Safety Monitoring Relating Management System of Concrete Facing Rockfill Dam is researched based on the Geographic Information System (GIS), the Finite Element Method (FEM) relating to safety monitoring management system. The major idea of the system developed indicates a integrating operation of the leading technologies in various fields. Using visual simulation technology, the system integrates the monitoring instruments with GIS. The data between database of monitoring information and GIS can transfer and extract based on relating technology. The finite element method programs are embedded in order to seek the numerical solution of dam's strain and stress. This system can forecast the real-time response of healthy dam and estimate whether the dam is operating well.Main work was done in this thesis as follows:(1) Establish various monitoring information database (in-situ information, information of design and construction, project safety information and hydrographic information,etc.) and managed by DBMS. It can provide the analysis and transfer of the information data conveniently and check up the reliability and error automatically using the function of data preprocessing. Establish the analysis database based on relating database and solve the problem of data extract and transferring storage in various databases. It can apply the various math models to forecast and monitor automatically.(2) Establish the monitoring model automatically including various statistical models, determinate model and mixed model. It can modify the original models automatically in order to establish the new models more appropriately along with the accumulation of observation information and time. It is first time to establish the visual management system of monitoring instruments based on GIS. The relating model between monitoring information database and GIS database is also researched. (3) This the paper puts forward a general structures of safety monitoring relating management system of CFRD. It is first time to embed the FEM structure analysis programs into MIS. It can compute the strain, stress and stability of the dam using the data in relating database and calculate the optimum stress based on least square method. It can back up the Yang's modulus of concrete and the deformation parameters of rock foundation and study out the index of safety monitoring automatically by using the result of structure analysis. This system provides the function of drawing various charts (solid fig, section fig, ichnography and etc.), process picture and result plots of math models. Managers can use it conveniently.(4) A new back analysis method of material parameter is established based on system identify principle and improved genetic algorithms. In order to improve the rate of convergence, the population of parameters generate in a limited area. Metropolis accepting rule of simulated annealing algorithm, backfire and annealing strategy are applied to upbuild the mechanism of accepting new solution. This method provides a theory guarantee for entire convergence. The new method resolves the slow rate of convergence and the local optimal solution in traditional method. It has prominent superiority of high precision, high rate in back calculation and so on.(5) The creep of rockfill materials and its research method is studied. The parameter determinate method of creep model and the creep analysis solution method of CFRD are studied. It also simulate the temperature field of face slab during construction and operating period, temperature stress and shrink stress of face slab through the whole process.