Research On Construction Control Technology For Prestress Concrete Continuous Rigid-Framed Bridge With Long Spans And High-Piers

With the rapid transport development , especially highway construction in the mountainous, more long span bridges were needed to span greater rivers and bays, PC continuous rigid frame bridge emerged as the times require and was developed fleetly in recent years. The PC rigid frame bridge can meet with the carrying capacity of long span bridge. This kind of structure is fit for the comfortable steer with no other expansion joints except for those at the two ends. It characterized the wholeness of structure, well load-bearing ability, construction rapidness, bright and pithiness bridge style, easy to maintain and convenient for segmental construction using the cantilever technique, so rigid frame bridge have taken an increasingly greater proportion in bridges constructed and those under construction.The PC rigid frame bridge adopts the economical and reasonable segmental construction technique (including cantilever installation and cantilever mold). This construction method results in the complex change of the internal forces and displacements in the bride. The bridge construction control is essential measure and step to ensure the quality and safety in the procedure of the bridge construction. In this papers the technique of the structure calculation and error adjustment measures used in bridge construction prefigurative deviation control was researched based on the construction control and monitor project of Ma-Shui river bridge.The first part of the papers give a brief historical retrospect to the development of PC rigid frame bridges, a detailed account of the information about their structure design and construction technique, an introduction to the recent research on domestic and abroad, and an exposition of the target and necessity of the study in this papers:First, analyze the influence of the factors came from the construction procedure on the bridge structure internal forces and line form, for the accumulation of experiences to guide construction control in the same type of bridge. Second, search for reasonable bridge construction supervision and control means in order to consummate the construction monitor and control technique used in long span PC rigid frame bridge.After all, the papers make a relatively profound study analysis of the structure calculation and error adjust forecast technique used in PC rigid frame bridges construction monitor and control, and comprehensive analyzes of the influence factors in building the bridges, based on the engineering practice. And draw the conclusion, It is feasible for the prefigurative deviation and error adjust used in PC rigid frame bridge construction control to use the calculation model and program brought forward in this papers.