大吨位三向预应力结构混凝土箱梁0号块施工技术研究

Construction Technology Study on No.0 Block of Three-direction Pre-stressed Concrete Box Girder with Large Tonnage

以崇左市崇左大桥为研究对象,在主梁0号块的施工过程中,通过对墩塔梁固结结构体系的分析和研究,采用预留后浇带湿接缝,横、竖向分块分次浇筑混凝土的施工方法,大幅降低了混凝土现浇箱梁的横向收缩带来的不利影响,保证了工程施工质量,对类似工程有一定的参考借鉴价值。

Taking the Chongzuo Bridge as the research object, during the construction of main girder No. 0 block, the pier tower girder fixed structure system was analyzed. The construction methods were adopted by reserving post-pouring belt as a wet joint, pouring concrete within each block and phase in transverse and vertical directions, which greatly reduced the negative effect caused by transverse shrinkage of cast-in-place concrete box girder, and ensured the quality of engineering construction. It could provide certain reference value for similar projects.