| With the rapid development of computer technology, CAD technology has been widely used in bridge construction, and continues to bring new bridge designing software. A certain amount of research results have been acquired in the bridge foundation and the development of CAD software applications in our own country. However, there are some disadvantages with the software which can not be modified properly and not take form maps automaticly. In this paper, on the basis of the analysis of bored pile foundation for bridge design and the calculation the author combine ObjectARX with MFC and take the measure of parametric design and drawing .The design of bored piles of the bridge and two-dimensional reinforcement procedures can make users known the distribution of reinforcement.The project working drawings of reinforced practice also can be realized.In the field of program development, this article first analysis the design steps of bored piles basement of the bridge.Then a model of program design and the method of calculating has been put forward through the analysis of a large amount of work for the process. The application of graphics technology improve the efficiency of the graphics. In short, the combination of MFC and ObjectARX programming approach make of the secondary development of AutoCAD realized. MFC's dialogue technology and ObjectARX's graphic object technology carried out the parameters of a bridge piling into figure. The program has become a software application which relate Windows system with AutoCAD intimately.It also can achieve the calculation and construction plans of bridge pile foundation, improving work efficiency and quality of the map.Finally, the author prove its utility and feasibility through applying it in project examples .It enhance the efficiency and accuracy for the design of bored pile foundation greatly. At the same time,the lack of practical application specify the right direction for further work. in the future.
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