基于无应力状态法的多塔密索斜拉桥施工技术

Construction Technology of Multi-span Intensive-cable-stayed Bridge Based on Unstressed State Method

为了使多塔密索斜拉桥成桥后达到合理的内力和线形状态,以菏泽长城路斜拉桥为对象,基于无应力状态法,以成桥线形为目标,采取有限元模型计算、现场实测监控,施工精确控制等手段,确保成桥后索力、主梁线形和结构内力状态良好,实践证明了该类桥梁施工控制方法的有效性和可靠性。

In order to make sure that the cable tension, the alignment of main girder and the internal force of completed status of Intensive-cable-stayed bridge were reasonable, on the basis of Changcheng road cable-stayed bridge of Heze City project, a finite element model calculation, an actual monitoring and a precise control of construction were applied based on unstressed state method. It is approved that the construction technology applied to this kind ofbridge was effective and reliable.