About the author:

1. Sun Engineering Consultants International, Inc., Guangzhou,Guangdong 510663, China;2. Sun International Academician Workstation,Guangzhou,Guangdong 510663, China;3. China Road and Bridge Engineering Co., Ltd., Beijing 100011, China

Abstract:

The main construction project of Macao C390B Light Rail Shipai Bay Line adopts a completestructural design scheme for the bridge structure,with a pier-girder consolidation continuous rigid framesystem. In response to the construction difficulties such as narrow urban road space, changes in crossinglines in turnout areas, different girder widths on both sides, small bridge curve radius, and tightconstruction periods, the optimal construction plan was selected based on cantilever assemblywork. Theimprovement technology of lightweight cross legged gantry crane and specialized lifting equipment forsegmental girders was studied, and the structural form of equipment support legs and specialized liftingequipment and rod devices were optimized. The practicality and universality of the equipment were fullyutilized,which can be suitable for construction conditions in narrow spaces and improve constructionefficiency. In response to the difficulties in installing and positioning the top block of the pier, as well asthe tight schedule, a “hollow out” prefabrication method is adopted, and the construction process of thetop block of the pier is optimized. Temporary tensioning is used to timely release the hook. Bycomprehensively applying the four innovative construction technologies mentioned above, the elevationdeviation of the cantilever assembly construction of the prefabricated continuous rigid frame bridgesegment is controlled within ±15mm, and the axis deviation is controlled within ±10mm, meeting thedesign requirements. All segment installation work was completed two months in advance.