CAJ | 학술논문

由于设计时梁体的底板结构过薄,安装应力设计不足导致主梁在15～17号块接缝在施工后续节段时主梁底板和腹板压溃.结合悬臂施工的斜拉桥施工事故处理的工程实例,通过加固方案比选,确定采用在底板与直腹板和底板与斜腹板的隅角处采用外包钢筋混凝土的劲性骨架小纵梁加固方案,实践结果表明采用的加固措施成功解决加固结构与原有结构的结合难题,不损伤原有结构、改善原有结构的受力状态是加固设计的关键.
유우설계시량체적저판결구과박,안장응력설계불족도치주량재15～17호괴접봉재시공후속절단시주량저판화복판압궤.결합현비시공적사랍교시공사고처리적공정실례,통과가고방안비선,학정채용재저판여직복판화저판여사복판적우각처채용외포강근혼응토적경성골가소종량가고방안,실천결과표명채용적가고조시성공해결가고결구여원유결구적결합난제,불손상원유결구、개선원유결구적수력상태시가고설계적관건.
Owing to the thinness of the designed bottom board structure of the beam body and the insufficiency of the designed erection stress, the bottom board and the web of the main girder crushed at the joints between No. 15 and No. 17 blocks in the later stage of the construction. Considering the engineering examples of the treatment of construction accident of the cantilever-constructed cable-stayed bridge, a strengthening scheme is determined after comparison and selection that uses small stiff framework longitudinal beam with reinforced concrete enclosure in the corners between the bottom board and the vertical web as well as between the bottom board and the inclined web. It is proved by practice that the problem of combination of the strengthening structure and the original structure is successfully solved by this strengthening scheme whose design key is to improve the forced state of the original structure without damaging it.