Long-span Prestressed Beam Bridge Construction Control Technology And Applications

In this dissertation, the up-to-date theory and method of construction control are researched by depending on the construction monitoring and controlling of Hong-shui river long span bridge ni Guang-xi province.There are two equally important contents-structure line shape and structure stress in construction monitoring and controlling. They must be controlled all-round in order to making trouble-free construction and reaching the design point. The analytic model of this bridge is established. A lot of influencing factors such as identifying and adjusting of structure parameter, construction technology, construction monitoring method, temperature effect, concrete Young's modulus and shrinkage and creep effect are considered in construction monitoring and controlling. The construction control of this bridge is realized through construction monitoring, back coupling and forecasting and the preplanned target is reached at last. The existing construction monitoring and controlling methods are profoundly researched and contrasted according to the features of PC continuous rigid frame bridge. The structure state parameters are estimated by discrete linear system, Kallman filtering method and back coupling technology. And these method and theory are applied and proved in construction control of Hong-shui river long span bridge.The organization system is established according to the construction courses of Hong-shui river long span bridge, which includes the loop of structure analysis, construction, test, forecasting, identifying, adjusting, preliminary announcement and construction. And the construction control flow process is established in this dissertation, as well as the solving programme. Lastly, the structure line shape and structure stress of Hong-shui river long span bridge are well.