钢管混凝土简支系杆拱桥管道摩阻系数确定及施工监控

Tube Friction Factors Determination and Construction Control of Concrete-filled Steel Tube Simply Supported Tied-arch Bridge

介绍了钢管混凝土简支系杆拱桥的施工过程和施工控制的主要内容,提出用弦振频率法实测系杆张拉力来分析系杆与管道之间摩阻系数的方法,根据得到的摩阻系数对系杆锚下张拉力设计值进行调整,保证了现场实际施工对张拉力的控制要求.指出了需要注意的若干问题.

The main contents of construction controls and construction process of the concrete-filled steel tube simply supported tied-arch bridge was introduced, and the method with vibrating wire frequency to to measure actually tension of tie bar was put forward. It can adjust the design values of the tension of tie bar under anchor according to the tube friction factors between the tie bar with tube, and assure the control of reality tension of tie bar on the spot. It has an important practical significance in construction control of the tied-arch bridge while some problems need to be noticed were pointed out.