黄黄铁路巴河特大桥钢管桩围堰封底设计优化  

The Bottom Sealing Design Optimization for the Steel Pipe Pile Cofferdam of Ba River Grand Bridge in Huang-Huang High-speed Railway

作　　者：刘奇 雷胜友[2] 杨忠领 周兴颖 LIU Qi;LEI Shengyou;YANG Zhongling;ZHOU Xingying(Qingdao Branch,SGIDI Engineering Consulting(Group)Co.,Ltd.,Qingdao 266000,Shandong,China;School of Highway,Chang’an University,Xi’an 710064,China;The 5th Engineering Co.,Ltd.,China Railway 16th Building Group,Tangshan 064000,Hebei,China)

机构地区：[1]上海勘察设计研究院(集团)有限公司青岛分公司,山东青岛266000 [2]长安大学公路学院,西安710064 [3]中铁十六局集团第五工程有限公司,河北唐山064000

出　　处：《科技和产业》2023年第13期245-249,共5页Science Technology and Industry

基　　金：铁道部科技研究开发项目(2010G003-F)。

摘　　要：依托黄黄铁路巴河特大桥23#墩锁扣钢管桩围堰,通过三维有限元数值计算表明,封底的应力和变形关于桩基中线对称分布,在桩基之间封底混凝土顶面顺桥向σ_(x)为拉应力而σ_(y)为压应力,横桥向σ_(x)为压应力而σ_(y)为拉应力,挠度在中心位置达到最大。优化强度计算公式,对比四边简支双向板法表明,在桩基约束作用下,相同等级的混凝土厚度可减小60~90 mm,建议封底采用1 m的C30混凝土浇筑。Relying on the lock catch steel pipe cofferdam,the twenty-third pier of Ba River Grand Bridge in Huang-Huang high-speed railway,build the 3D finite element model.The numerical calculation manifests that the stress and deformation are both symmetric around the center lines of piles.On the top surface of bottom sealing between piles,following the bridge,σ_(x) is tension stress and σ_(y) is compression stress.Transverse to the bridge is just the reverse.The maximum of deflection is located in the centers of mid-piles concrete.Optimizing the calculation expression for the thickness and concrete strength,compared with the method of two-way slab,demonstrate that bottom sealing is obviously restrained by piles.It can reduce the bottom sealing thickness around sixty to ninety millimeters in the same concrete grade.Suggest that bottom sealing is poured by the thickness of 1.0 meter in C30.

关 键 词：钢管桩围堰 封底 数值分析 厚度 强度 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U445.556[交通运输工程—道路与铁道工程]