Taking Fangxing-Mayan section expansion project of G3 Jing-Tai highway as an example,the paper studies the impact of hollow-slab bridge splicing upon original bridge beam slab stress,and puts forward the splicing scheme with upper structure connection and without bottom structure connection,and introduces splicing construction organization scheme and design methods,so as to improve the expansion project safety and reliability.%以G3京台高速方兴大道至马堰段改扩建工程为背景,研究了空心板桥拼接对原有老桥梁板受力状态的影响,提出了上部构造连接、下部构造不连接的拼接方案,并介绍了拼接连接施工组织方案与设计方法,提高了改扩建工程的安全可靠性.
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