重庆李渡长江大桥斜拉桥施工监控

在斜拉桥的施工过程中,对结构的施工监控是必不可少的。在诸多的监控项目中,以索力、线形、应力监控最为重要。结合重庆李渡长江大桥斜拉桥施工监控实践,阐述频谱分析法测试索力的可靠性;运用相对标高立模时,立模标高施工时机的确定;在无应力计缺失的情况下,对非应力应变的修正。

Construction Monitoring of Cable-Stayed Bridge of Lidu Changjiang River Bridge in Chongqing

The construction monitoring of a cable-stayed bridge structure is indispensable in course of construction of the bridge.Of various monitoring items of the bridge,the items of cable force,geometry and stress monitoring are the most important ones.In this paper,in the light of the construction monitoring implementation of the cable-stayed bridge of Lidu Changjiang River Bridge in Chongqing,the reliability of measurement of the cable forces of the Bridge by frequency spectrum analysis method is presented,and the determination of formwork elevation in the construction while the formwork is to be set up according to the relative elevation and modifications of non-stress and non-strain values in the absence of stress gauges are described as well.