湖北宜昌香溪河大桥5#主塔对拉系统及主动横撑施工设计计算

Construction Design Calculation of Pull System and Active Transverse Bracing of Hubei Yichang Xiangxi River Bridge 5# Main Tower

香溪河大桥工程5#主塔采用爬模法施工,下塔柱拟采用拉杆进行对拉,中塔柱拟采用钢管作为横撑,并在施工过程中,采用千斤顶进行调整,通过这种办法保证施工过程中主塔的线性和应力均满足要求,本文采用midas civil模拟施工过程,确定拉杆预拉力和横撑预顶推力,并考虑温度对施工的影响。

Xiangxi River Bridge project 5# main tower uses climbing formwork construction method, lower tower uses the pull system,the middle tower intends to use the steel pipe as the cross brace, and in the process of construction, the jack is used to adjust through this method to ensure linearity and stress of the main tower to meet the requirements. In this paper, the midas civil is used to simulate the construction process to determine the pre-tension of the pull rod and the pre-thrust of the transverse bracing, and the influence of temperature on the construction is considered.