Study On Construction Technics And Linetype Control Of Continuous Rigid Frame Bridges With Piers Of Hige Pile Bearing Platform

As the accumulation of the bridge construction experience, the construction technic standard of continuous rigid frame bridges with piers of high pile bearing platform in deep water has been developed. Due to its complicacy, during work progress of the various bridge versions, it's not only need the different construction technology to accommodate; but also need to apply the construction monitor in the meantime, so that it can provide the bridge construction with an entire and safe construction system. This paper is chief based on He-Nan-Xiao-San-Xia bridge's practical construction to study the construction technics of bridges with piers of high pile bearing platform in deep water. Include the construction technics of cast-in-situ bored pile; the construction technics of the bearing platform; the construction technics of piers body and the box-girder. In those parts, the high pile foundation mainly considers the drilling technology and construction under water, the part of platform mainly talk about the feature of the high piles, the piers also need to consider the construction under water, and the box girder part mainly studys around the design of the cradle and construction process.Using the software MIDAS to build model and commit structural design, analysis and compute. And then getting the He-Nan-Xiao-San-Xia bridge's theoretical camber and states of the stress and strain. After getting several camber adjustment data, this paper through studying the gray prediction theory which is full of research finds in recently years and taking advantage of an improved non-equal gap NGM(1,1) model which has a high-precision, is successful to predict the next cantilever casting box girder section formwork baseboard elevation data error. it can make sure the whole bridge's linetype error which is the key monitor work in the whole continuous rigid frame bridge structure in allow prescribed scope, and monitor structural inside stress's development tendency, finally, to reach the purpose which guarantees the whole bridge construction proceed smoothly,safely and quality. And the prediction of cantilever casting box girder section formwork baseboard elevation data can enhance the gray prediction theory's ability of application in the continuous rigid frame bridge's linetype control.This paper mainly discusses the two parts of the He-Nan-Xiao-San-Xia bridge, the one is the construction technology and the gray prediction theory beam bridge's linetype control. It emphasizes that the two parts have their necessity and feasibility during the construction of continuous rigid frame bridges with piers of high pile bearing platform in deep water. Considering the He-Nan-Xiao-San-Xia bridge's successful application experience, other similar study can use this experience if it's necessary, and also give the work of the same type continuous rigid frame bridges with piers of high pile bearing platform in deep water engineering construction technology and linetype control a helpful reference.