乐安水电站下游交通桥架梁施工技术

Construction Technology of Traffic Bridge T-beams Erection at the Downstream of Le'an Hydropower Project

乐安水电站建设期间,为了满足水电站施工的需求,根据设计规划在其下游修建了一座交通桥,该桥采用3 m×30 m预应力混凝土T梁结构。鉴于该交通桥地理环境特殊,同时横跨雅砻江及S217省道,导致其现场作业空间受限,施工安全风险性较高。通过多方案比选,项目部最终决定采用汽车吊架梁配合钓鱼扒杆法进行T梁的架设方案。阐述了对汽车吊选型、吊装扒杆设计、架设等关键施工技术进行的分析过程,在安全高效的前提下按时完成了架梁任务。

In order to meet the construction needs during the construction of Le'an Hydropower Project,a traffic bridge was built according to the design plan.The bridge design adopts 3 m×30 m prestressed concrete T-beam structure.Due to the special geographical environment of the bridge,which spans the Yalong River and S217 provincial Road at the same time,the site operation space was limited,and the construction safety risks were high.Through the comparison and selection of multiple schemes,the T-beam erection scheme was finally adopted by combining the automobile hanger beam with the fishing rod method.At the same time,the key construction technologies such as the selection of automobile crane,the design and erection of the lifting rod were analyzed,and the beam erection task was completed on time under the premise of safety and efficiency.