Design And New Construction Technique Study Of Prestressed Continuous Rigid Frame Bridge With Y-Pier

The Continuous Rigid Frame Bridge has achieved great development from scratch in nearly a hundred years. It was 70's when Prestressed concrete continuous rigid frame bridge first to be used in bridge project in China's cities. With the rapid development of highway, China Road and Bridge get a lot of leaps, long span bridge, especially prestressed concrete continuous rigid frame bridge, has become the main type of bridge.Rigid Frame Bridge with Y-Pier is one type of Prestressed Continuous Rigid Frame Bridge, what's different from normal Prestressed Continuous Rigid Frame Bridge and multi-span bridge Rigid Frame Bridge is that it's made of a Y type pier. It has the same mechanical properties and advantages with these structures. Compared with the Continuous Beam Bridge in design, Rigid Frame Bridge with V-Pier has a longer span, and can further reduce the peak moment, additionally it can reduce the height of the beam. Compared with the Continuous Rigid Frame Bridge, it has a smaller bending moment at the middle of the span and pivot, and has a beautiful appearance with more compact structure. When the pier of Rigid Frame Bridge with V-Pier is higher, a vertical pier can be connected following the V-pier legs, which forming Y-type rigid frame, and they have the same working behavior. Comparing with Rigid Frame Bridge with V-Pier, the secondary stress of the Rigid Frame Bridge with Y-Pier which originated from temperature, concrete shrinkage and creep, settlement and other factors is larger, but the structure can decrease two deck expansion joints and has no need of hanging construction plant, which get a result of improving ride comfort and reducing the construction difficulty.Based on the current research and problems, combined with the engineering of Inner Mongolia Erdos Avenue Bridge in Erdos City - a typical three-span prestressed concrete continuous rigid frame bridge with Y-pier, this paper used the method of Shell element analysis to get a detailed spatial analysis by the spatial analysis program MIDAS/Civil, the paper focused on the spatial static and dynamic behavior of this type of bridge under different load types, and explored the differences between predicted value by general theoretical and the actual spatial effect, and correlational experimental studies has been done durling the research period.Finally, the paper got more detailed illustration about the onstruction technology of Rigid Frame Bridge with Y-Pier, it gave a full exposition of the whole construction process, construction procedures, construction points, and notes combined with the local geological features, and the studies can provide a reference for similar projects.