Researeh On The Construetion And Control Of Yudong Yangtze River Bridge

Continuous rigid frame is one of the main bridge of large-span prestressed concrete beam, combines mechanical characteristics between the continuous beam and T-shaped bridge girder, makes girder to be continuous beam body, and consolidate with Thin-wall piers. It is similar with continuous beam, and can make a league porous. Continuous rigid frame has been growing up rapidly with unique predominance of handy construction, economical cost, reasonable internal force and comfortable traveling. During the cantilever construction of the prestressed concrete continuous rigid frame bridge, the beam axis shape of formed blocks can not be regulated during the subsequent constructions. To ensure the successful closure of the bridge, and make sure that the axis shape and the internal force of the bridge accord with the design request, construction control is of importance during the bridge construction.Long-span continuous rigid-frame bridge construction control is cycle of construction, measurement, identification, amend, forecast and construction. In order to achieve the basic requirement of the control of the construction process, we can view of random optimal control system of structure state between theoretical and measured, the paper analyses the error, the adjustment, the forecast. The construction control of this bridge is realize through construction calculating, monitoring, back coupling and the preplanned target is reached at last.On the based of fish hole changjiang river bridge for engineering examples, according to a long-span prestressed concrete continuous girder bridge construction control characteristics, and put forward the reasonable construction control scheme, established a comprehensive detection system. Used for the detection system, in construction process, successful collected the construction process and the main structure of the displacement control section and other data, after the stress in the construction process of the whole bridge construction supervision, guarantee the smooth fold the bridge, and in all the bridge construction is finished, the linear in bridge designed line after allowing range.