Design, construction and monitoring of continuous curved box girder bridge during bearing replacement-case study

AbstractRubber bearing has been widely applied in bridge engineering because of its simple structure. During use, rubber bearings are prone to cracking, aging and shear deformation, which need to be replaced in time. In this paper, a bearing replacement project of continuous curved bridge in Lin’an, Zhejiang, China is taken as a case, and the design scheme, construction technology and construction monitoring of the bridge bearing replacement without interrupting traffic were proposed. Finite element model of this bridge was established, the jacking force and jacking height of this bridge were determined through analysis, and a scheme was designed for the reinforcement of piers. The construction process and specific construction technical points was introduced in detail. In addition, to determine and control the absolute safety of the jacking process, the jacking force, box-girder displacement, and bridge stress were monitored. The results show that the finite element analysis can provide technical guidance for the design theory of bearing replacement. The bearing replacement design scheme, construction technology and construction monitoring adopted in this project were safe and feasible. The research content has important reference significance for solving similar bridge bearing replacement projects in the future.Keywords: Bearing replacementbridge jackingconstruction monitoringcontinuous curved bridgefinite element analysisreinforcement scheme AcknowledgementsThe authors acknowledge the financial support provided by scientific research projects of basic scientific research expenses in Heilongjiang Provincial Colleges and Universities (2022-KYYWF-1094, 2021-KYYWF-0033), Key research and development plan guidance project in Heilongjiang Province (GZ20220083), Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education (Heilongjiang University), Heilongjiang Provincial Universities Central Support Local Universities Reform and Development Funding, and Key research and development plan guidance project in Heilongjiang Province.Disclosure statementNo potential conflict of interest was reported by the authors.