Research into design and construction key technologies of prestressed concrete continuous rigid frame bridge

Abstract

Fengshi River especially big bridge, “The first highest bridge in Zhongyuan”, is the largest large-span concrete continuous rigid frame bridge in Henan express way. The superstructure of main span is the pre-stressed concrete continual rigid frame, and the substructure is rectangle hollow thin wall pier, and the highest pier is 107 meters high and with 2.2 meter width pile group foundation; the self-lifting platform trap door method of construction is adopted to construct high pier, and the two “T” synchronous suspending crane construction method, cantilever concreting method, is adopted to construct box girder; for achieving the goal of making formed bridge state of constructing be consistent as the designed bridge state, of making the stress state be reasonable, of making the line of formed bridge be smooth, the field construction quality implementation group is established, and it implements the entire process quality safety control and the technical guarantee such key links as safety, material quality and so on; Thus speed up the construction progress and guaranteed the project quality and the construction security, and accumulated much important project experience for the concrete continual rigid frame bridge structural design and the construction quality control.