摘要
现有特大桥梁双壁钢围堰支护结构在深水状态下通常难以保证基本的承载力。为减小应力、提高桥梁安全性,探索特大桥水中基础双壁钢围堰施工技术。建立双壁钢围堰力学模型,模拟特大桥材料特性,计算双壁钢围堰荷载应力,以双壁钢围堰拼接为基础设计新的特大桥水中基础双壁钢围堰施工方案。在实际工程中分别测试内外壁板测点、竖肋测点以及内支撑测点在不同水位下的应力变化值,并计算0-10 m水位差下的桥梁形变挠度。实验数据显示,该特大桥施工在水位差为10 m时所得的最大挠度为5.27 mm,满足设计规范要求,适用于实际施工。
The existing double wall steel cofferdam supporting structure of super large bridge is usually difficult to ensure the basic bearing capacity in deep water.In order to reduce the stress and improve the safety of the bridge,the construction technology of double wall steel cofferdam for underwater foundation of super large bridge is designed.The mechanical model of double wall steel cofferdam is established to simulate the material characteristics of super large bridge,calculate the load stress of double wall steel cofferdam,and design a new construction technology of double wall steel cofferdam for underwater foundation of super large bridge based on the splicing of double wall steel cofferdam.In the engineering practice,the stress variation values of the inner and outer wall panel measuring points,vertical rib measuring points and inner support measuring points under different water levels are tested respectively,and the deformation deflection of the bridge under the water level difference of 0-10m is calculated.The experimental data show that the maximum deflection obtained in the construction of the super large bridge when the water level depth is 10m is 5.27mm,which meets the requirements of the design specifications.It can be seen that the construction technology can be applied to the actual construction.
作者
王振杰
WANG Zhen-jie(The 5th Engineering Co.,Ltd.of China Railway 18th Bureau Group,Tianjin 300000,China)
出处
《广东水利电力职业技术学院学报》
2022年第4期5-9,共5页
Journal of Guangdong Polytechnic of Water Resources and Electric Engineering
关键词
特大桥
基础深水施工
双壁钢围堰
力学特性
桥梁工程
super major bridge
deep water foundation construction
double wall steel cofferdam
mechanical properties
bridge works
作者简介
王振杰,男,工程师,研究方向为桥梁工程施工。
