改扩建水中新建承台对邻近旧桥基础的影响分析
Analysis of the Impact of Newly Built Pile Caps on the Foundation of Adjacent Old Pile Caps in Water during Reconstruction and Expansion
杨红全 1杨兴1
作者信息
- 1. 中交第二公路勘察设计研究院有限公司 武汉市 430056
- 折叠
摘要
高速公路改扩建工程水中桥跨布置条件受限,新建承台基础与旧桥承台基础相距较近,水中新建承台施工需设置钢围堰,在内外水头差、围堰变形情况下将对邻近旧桥承台基础存在一定影响.结合工程实例,建立既有桥梁基础力学分析模型,根据不同施工阶段分析既有桥梁结构基础位移和内力的变化,评估既有桥梁结构的安全性.计算结果表明,结构的承载力满足要求,新承台施工对旧桥结构的影响效应在可控范围内.
Abstract
Due to limited conditions of the arrangement of bridges in water of the expressway renovation and expansion project,the distance between the newly built pile caps and the old pile caps is relatively close.Steel cofferdams need to be set up for the construction of new pile caps in water,which will have a certain impact on the adjacent old pile cap under the conditions of internal and external water head difference and cofferdam deformation.In this paper,the mechanical analysis model of existing bridge foundations is established based on the actual project.Based on different construction stages,the changes in foundation displacement and internal force of existing bridge structures are analyzed and the safety of existing bridge structures is evaluated.The calculation results indicate that the bearing capacity of the structure meets the requirements,and the interaction between the new pile caps construction and the old bridge structure is within controllable range.
关键词
桥梁工程/邻近承台/钢围堰/水头差/结构变形/安全性Key words
bridge engineering/adjacent cushion cap/steel cofferdam/head difference/structural deformation/safety引用本文复制引用
出版年
2024
NETL
NSTL
万方数据