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Rslautal桥是一座预应力混凝土箱梁桥,该桥位于德国靠近捷克边境,是欧洲E48号公路通往布拉格路线位于Rslautal河谷处的桥梁。受路段内连续增长的重车交通量影响,桥面上需要附加第三个车道,汽车荷载增加要求对该桥实施加固。由于桥位路段内交通量较大,要求该桥在整个加固维修期间要确保一个车道车辆通行。加固施工期限为3个月。苛刻的时间限制以及交通压力迫使联邦德国公路局采用创新技术。箱梁纵向加固采用体外预应力钢束,锚固于附加设置的箱梁内自密实混凝土横隔板上。采用碳纤维增强聚合材料(CFRP)条嵌入粘结在桥面板顶混凝土保护层开槽内,用于抵抗附加的箱梁悬臂板顶面弯矩增量。由于环氧粘结剂冷养护力学性质与温度密切相关,因此必须对施工和运营服务期间的温度影响因素给予关注。该文阐述了环氧粘结剂的热力学性能,桥面板加固设计成果,及建立用于长期同步评估悬臂桥面板加固功效的观测系统。R slautal桥加固案例展示了革新技术使用,保证了桥梁在美观、实用、经济方面的优势,同时为扩展对桥梁加固实施手段的认识提供了高品质素材。
The Rslautal Bridge is a prestressed concrete box girder bridge in Germany near the Czech border. It is a bridge connecting the European Route E48 to Prague in the Rslautal valley. Affected by the continuous growth of heavy-car traffic in the road section, a third lane needs to be attached to the bridge deck, and an increase in vehicle load requires reinforcement of the bridge. Due to the large amount of traffic in the bridge section, the bridge is required to ensure that a lane vehicle passes during the entire reinforcement maintenance. Reinforcing the construction period of 3 months. Harsh time limits and traffic pressure forced the Federal German Roads Agency to adopt innovative technologies. Longitudinal reinforcement of the box girder using external prestressed steel beam, anchored in the additional set of box girder self-compacting concrete diaphragm. Adopting carbon fiber reinforced polymer (CFRP) strip embedded in the groove of concrete protection layer on the top of bridge deck to resist additional bending moment on the top of box girder cantilever board. As the mechanical properties of cold-curing epoxy adhesives are closely related to temperature, attention must be paid to the temperature influence during construction and operation of the service. This paper describes the thermodynamic properties of epoxy adhesives, bridge deck reinforcement design results, and the establishment of long-term synchronization assessment cantilever bridge reinforcement effectiveness of the observation system. R slautal bridge reinforcement case demonstrates the use of innovative technology to ensure that the bridge in the beautiful, practical and economic advantages, but also to expand the bridge reinforcement means of implementation provided a high-quality material.