摘要
随着深水基础施工技术的发展,双壁钢围堰在桥梁承台施工中得到广泛应用.文中运用有限元软件MIDAS/Civil对沪通长江大桥4#主墩承台双壁钢围堰在不同施工阶段的受力性能进行模拟,并结合理论计算对双壁钢围堰的抗浮性和内支撑的稳定性进行分析.研究结果表明:采用数值分析的方法可以较为真实地对双壁钢围堰在实际施工过程中的受力情况进行模拟;钢围堰内封底混凝土达到设计强度,且围堰内的水抽干时为最不利工况,此时结构的最大应力和最大变形出现在围堰中部和下部内支撑之间的内、外壁板上.文中的研究结果可为同类型的工程施工提供指导和参考.
With the development of deep water foundation construction technology,double wall steel cofferdam is widely used in bridge pile cap construction. Based on the Shanghai Yangtze River Bridge 4# pier,theoretical calculation methods are adopted to analyze the anti buoyancy and the stability of internal support of double-wall steel cofferdam,and finite element software MIDAS / Civil is used for the Shanghai Yangtze River Bridge Main Pier No.4 double-wall steel cofferdam to simulate its different construction stages. The results show that the use of numerical analysis method can be more practical for double-wall steel cofferdam in the actual construction process for the simulation of the force. The inner steel cofferdam sealing concrete can meet the design strength requirement,and the condition that the water is drained within a cofferdam is the most unfavorable. In this case,the structure of the maximum stress and maximum deformation occurs in the outer wall cofferdam middle and lower inner panel between supports. This study can provide guidance and reference for the construction of the same type engineering.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2016年第5期508-512,共5页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
住建部科技计划资助项目(2013-k4-26)
关键词
双壁钢围堰
施工阶段
受力性能
桥梁承台
double-wall steel cofferdam
construction stage
force performance
bridge pile cap
