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根据以往高速拼接施工经验及桥梁拼接课题研究成果,高速公路新老桥梁拼接后沉降差要控制在5mm以内,因此在施工过程中如何避免差异沉降和控制钢筋混凝土的收缩徐变,成为施工过程中的控制要点,也是确保拼接质量满足设计要求的关键。潼西高速公路改扩建工程采取两侧拼接为主、局部分离为辅的原则,桥梁两侧加宽采用同结构、同类型、同跨径、上连下不连的方法予以拼接。
According to the past high-speed splicing construction experience and bridge stitching research results, the new and old highway splicing after the bridge settlement difference to be controlled within 5mm, so in the construction process to avoid differential settlement and control of the shrinkage and creep of reinforced concrete, a construction process Control points, but also to ensure the quality of the mosaic to meet the design requirements of the key. Tungxi Expressway reconstruction project to take both sides of the main splicing, local separation supplemented by the principle of widening the use of the same structure on both sides of the bridge, with the same type, with the span, up and down the method to be spliced.