摘要
索塔类桥梁主塔下横梁施工程序复杂,质量要求高,是主塔施工成败的关键.为进一步强化索塔类桥梁横梁施工,以石首长江公路大桥为例,对索塔横梁施工技术进行探讨.本工程主塔下横梁跨越宽度大,混凝土荷载大,距承台面高,具有风险大、难度大的特点.结合本下横梁工程自身结构特点,采用钢管柱支架法的施工工艺,施工时精心设计承力支架,通过方案比选,采用塔梁异步的施工方案.施工过程合理安排施工顺序,择优选择施工工艺,具体措施满足施工需要,通过对关键施工技术的控制,顺利完成了下横梁的施工.工程实践证明该下横梁施工技术为工程质量提供了可靠保障,取得了良好的社会经济效益,同时该技术也为类似桥梁工程索塔施工积累了一定的成功经验.
Because of the complex construction procedure and high quality requirements, the lower crossbeam of the main tower of cable-tower bridge is the key to the success or failure of the main tower construction. For further strengthening the construction of pylon bridge crossbeam, the construction technology is discussed based on the Shishou Yangtze River Highway Bridge. The crossbeam under the main tower of the project had the characteristics of wide span, large concrete load and high distance from the cap surface, which was risky and difficult. Combined with the structural characteristics of the lower crossbeam project, the construction technology of steel pipe column bracket method was adopted. The bearing bracket was carefully designed during the construction. Through scheme comparison, the asynchronous construction scheme of tower and beam was adopted. In the construction, it was necessary to arrange the construction sequence reasonably, select the best construction technology, and take specific measures to meet the construction needs. By controlling the key construction technology, the construction of lower crossbeam was successfully completed. The engineering practice proved that the construction technology of the lower cross beam could provide reliable guarantee for the quality of the project and achieve good social and economic benefits. Meanwhile, it also accumulated some successful experiences for the cable tower construction of similar bridge projects.
作者
李春江
Li Chunjiang(China Railway Construction Bridge Engineering Bureau Group First Engineering Co. Ltd. , Dalian Liaoning 116033 , China)
出处
《铁道建筑技术》
2019年第6期79-83,共5页
Railway Construction Technology
基金
中国铁建股份有限公司科技研发计划项目(16-C09)
关键词
索塔
下横梁
支架
塔梁异步
tower
lower crossbeam
bracket
asynchronous construction technology of tower and beam
