Span Prestressed Concrete Continuous Rigid Frame Bridge Design And Construction Of New Technologies And Construction Control

With the development of science technology and traffic enterprise, the continuous rigid frame bridge has been growing up rapidly in the recent years with it's unique predominance of handy construction, economical cost, reasonable internal force and comfortable travelling. It has strong competitive ability when the main span is in the range from 200m to 300m(even over 300m). But the theories and experience of it are not very perfect because of its relatively late appearance. There are still several questions in the construction.Relying on the Jinchangling Lancangjiang Bridge of Dabao Line in Yunnan province, three points include construction, design and constructional supervisory control have been engaged in research. ;1. The trend of the development of burden and light hanging basket in the cantalever construction of continuous rigid frame bridge has been prospected, the roof truss and cable-state composite hanging basket also has been designed by analyzing and comparing with other ones.2. Visual programming of the BSCAS(Bridge Structure Constructional Analysis System) is realized, the mechanism of establishment and discretization of diagrammatic drawing of bridge structure has been analyzed in details with the theory of mechanics and finite element method. At the same time, theory, function and applicability of the program have also been discussed in the paper.3. The simplification and simulation of group piles of foundation of continuous rigid frame bridge has been introduced. The cancellation of web bending reinforcement and continuous bar in upper structure of continuous rigid frame bridge is discussed with mechanics method.4. The light of Upper structure of continuous rigid frame bridge has been discussed in the paper.5. The method of closure of beam and control of elevation has also been analyzed in details.The BSCAS program can successfully simulate and analyze the behave of bridge structure in construction. At the same time, the roof truss and cable-state composite hanging basket in the paper is also an idea structure in bridge construction. Especially, the significance is obvious in mountain area.