池州长江公路大桥主桥承台钢管桩围堰施工分析

Analysis on the Construction of Steel Pipe Pile Coff erdam for the Main Bridge Bearing Platform of Chizhou Yangtze River Highway Bridge

文章基于池州长江公路大桥工程背景,详细介绍了钢管桩围堰设计方案,为评估承台钢管桩围堰设计方案的安全性,通过有限元软件建立三维数值模型,模拟了基坑施工全过程,分析基坑长短两侧的地表沉降规律及钢管桩水平变形规律。进一步介绍了Z4#主墩承台钢管桩围堰施工工艺。结果表明,基坑施工对基坑长边一侧的地表沉降及钢管桩水平变形影响更为显著,并且两者都在可控范围内,说明该布置方案合理、安全。

Based on the engineering background of Chizhou Yangtze River Highway Bridge,this paper introduces the design scheme of steel pipe pile cofferdam in detail.In order to evaluate the safety of the design scheme of steel pipe pile cofferdam for the bearing platform,a three-dimensional numerical model is established by finite element software to simulate the whole process of foundation pit construction,and the surface settlement law on long and short sides of the foundation pit and the horizontal deformation law of steel pipe pile are analyzed.The construction technology of steel pipe pile cofferdam of Z4#main pier bearing platform is further introduced.The results show that the foundation pit construction has a more significant influence on the surface settlement on the long side of the foundation pit and the horizontal deformation of the steel pipe pile,and both are within the controllable range,indicating that the layout scheme is reasonable and safe.