Construction Control Technical Research Of Long-span Continuous Rigid-framed Curved Bridge

With the rapid development of transportation, as a guttural project of freeway,continuous rigid-frame bridge has shown exceptional growth in recent years. It is easierfor large-span continuous rigid-framed curved bridge to overcome the restrictions onterrain and surface features that by shortening the length of the road or avoidingunfavorable geologic areas such as karst,landslip and debris flow as possible, peoplecould reduce engineering cost efficiently. Curved bridges have got more and morewidely used in the present traffic engineering projects. However, long-span continuousrigid-framed curved bridge usually would cost a long construction time, bearcomplicated forces and work in severe condition that construction monitoring isnecessary to ensure the project quality, the engineering safety and the qualified smoothstatus of curve continuous rigid frame bridge during the course of construction.This article is mainly based on the project of one extra-large bridge. A MIDASConstruction Simulation is developed to determine the stresses and deformations ofeach segment in the construction process to ensure the internal force status andalignment meet the certain design requirements of the extra-large bridge in constructionor after construction finished. The paper discusses the internal force control and linearcontrol of Changxi extra-large bridge in detail and contrastively analyzes the on-sitemonitoring data and theoretical data. Then it turned out that all the errors between dataare in the allowable range and both the internal force status and the alignment are goodwhich means that the entire construction monitoring is successful. It is hoped that theresearch could provide some valuable reference for the similar large-span continuousrigid-framed curved bridges.