摘要
贵阳市轨道交通3号线一期工程贵黄路高架桥桩基托换工程具有施工空间小、工程风险高、技术难度大等难点。该工程在不影响高架桥正常交通的情况下,采用被动托换技术对高架桥进行结构托换。根据有限元分析结果,承台、桩基和新旧承台界面区的总体应力水平均较低,根据规范进行的桩基承台验算结果显示安全度较高。桥墩顶部的最大竖向变形为3 mm,满足桩基托换和区间穿越施工期间的变形要求。
Guihuang Road Viaduct Pile Foundation Underpinning Project of Guiyang Metro Line 3 Phase I Project has the difficulties of small construction space,high engineering risk and large technical difficulty.Under the condition of not affecting the normal traffic of viaduct,the passive underpinning technology is used to carry out the structure underpinning of the viaduct in this project.Based on the finite element analysis result,the overall stress level of the interface zone of base slab,pile foundation,and old and new base slabs is lower.The checking calculation result of pile foundation and base slab according to the standards shows that the safety is higher.The maximum vertical deformation at the top of bridge pier is 3 mm,which meets the deformation requirements in the period of pile foundation underpinning and interval crossing construction.
作者
王祥
汤翔
WANG Xiang;TANG Xiang
出处
《城市道桥与防洪》
2020年第9期145-148,M0016,共5页
Urban Roads Bridges & Flood Control
关键词
矿山法区间
高架桥
基础托换
有限元分析
mining method interval
viaduct
foundation underpinning
finite element analysis
