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泉州湾跨海大桥主桥组合梁采用整体节段场地总拼、横向反拱及桥面板胶拼等全新施工工艺,国内外均无实施先例。针对施工工艺中存在的技术难题,开展组合梁整体节段横向反拱足尺模型试验。试验预演组合梁制造阶段施工流程,并对钢梁线形以及桥面板应力进行了测试。试验结果表明:所采用的横向反拱工艺以及设备是可行的;对于20m宽幅组合梁来说,钢梁反拱至17~18mm时可为桥面板预存1.5~3MPa压应力;从节段接缝口横向变形来看,梁段在经历场地拼装及横向反拱过程后,将为节段桥位安装累积不大于1.5mm的不利误差。
Quanzhou Bay Bridge using the main section of the main bridge composite site total fight, cross-arch and bridge deck plastic spelling new construction technology, no precedent at home and abroad. In view of the technical problems existing in the construction process, a full-scale cross-arch model test of the whole segment of the composite beam is carried out. The test rehearsed the construction process of the composite beam manufacturing stage, and tested the linear shape of the steel beam and the stress of the deck slab. The test results show that: the horizontal anti-arch technology and equipment are feasible; for the 20m wide composite beam, the steel beam can arch compressive stress of 1.5 ~ 3MPa for the bridge deck when it is arch-inverted to 17 ~ 18mm; Seams transverse deformation point of view, the beam segment in the site after the assembly and reverse arch process, the bridge will be installed for the accumulation of not more than 1.5mm unfavorable errors.