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桥梁的拼接模式采用同结构、同类型、同跨径的梁片两边加宽,上部构造连接,下部构造不连的方法予以拼接。标段内桥梁的拼接采用下部分离,上部连接的方案,将老桥护栏、梁板的翼缘切除后,在切割位置植入钢筋,与新桥梁板预留钢筋焊接,浇注混凝土,将新老桥连接。老桥拆除技术措施、新植入钢筋的粘接性和湿接缝施工能将是拓宽桥梁的受力、安全的关键因素。本文从施工角度讲解旧桥拓宽中新老桥拼接在施工中的要求和注意事项。
Bridge splicing mode using the same structure, with the same type, with the widening of the beam on both sides of the widening, the upper structure of the connection, the lower part of the structure is not connected to splicing. The splicing of the inner section of the standard section adopts the lower separation and the connection scheme of the upper section. After the flanges of the old bridge and the flanges of the beam are cut off, the steel bars are implanted in the cutting position and the steel bars are reserved for welding with new bridge plates. Concrete is poured to pour new and old Bridge connection. The technical measures for the demolition of the old bridge, the construction of the new implanted steel and the construction of the wet seams will be the key factors to broaden the stress and safety of the bridge. This article explains from the construction point of view to broaden the old bridge in the construction of new and old splicing requirements and precautions.