Research On Intelligent Construction Control Technology Of Continuous Rigid Frame Bridges

Intelligent control is the future development trend of long-span bridge’ construction control. Based on the continuous rigid fame bridge as the subject, this dissertation studied the basic control theory and the key technology about the construction control for continuous rigid frame bridge. By combing with the computer-aided technology, an intelligent construction control system of continuous rigid frame bridge is developed. The main results of this research have:(1) The structure of the intelligent construction control system for continuous rigid frame bridge is seted up. It includes five subsystems: the database, the knowledge base, the calculation subsystem, the control expert subsystem and the report subsystem. The function of each subsystem is presented.(2) According to the basic theory of intelligent construction control systems and achievement of continuous rigid frame bridge construction control, the database and the knowledge base of the intelligent construction control system are established. Then the user can store, inquire and use the data and knowledge.(3)The key knowledge of construction control for continuous rigid frame bridge are studied. The calculation and optimization about the closure jacking-force are discussed. Some problem which may be happened in the construction process of continuous frame bridge are discussed, and the solution to the problem are presented. The expert system technology is introduced in this intelligent control system. By utilizing the expert’ experience in continuous rigid frame bridge construction control, the expert system can imitate the experts’ reasoning way to give the user various proposals to deal with various problem.(4)The software of intelligent control system for continuous rigid frame bridge is developed. Visual Basic6.0 is used to be the development language, and Access 2007 is used to be the database development tool. A concise basic interface of this software is designed.The function of the system is achieved.(5)The intelligent construction control system of continuous rigid frame bridge is applied to the construction control of the main bridge of GuangQing high-speed rail across the ZhaoHua freeway bridge. The control process and the results show : the system can calculate and control accurately.