独塔无背索斜拉桥综合施工技术

Comprehensive Construction Techniques for Mono-Towered,Backcableless Cable-Stayed Bridges

结合长春轻轨伊通河独塔无背索斜拉桥实际工程,详细介绍了沉井基础、主梁、主塔(配重箱梁和塔身)和斜拉索施工技术,并在施工过程中对结构内力及位移进行监测以指导施工。监测结果表明,计算模拟工况与实施效果基本吻合。从运营情况看,实体未出现结构性裂纹,达到预期效果。

With the project of the mono-towered, baekcableless cable-stayed bridge over the Yitong River of the Changchun Light Rail Transit as a practical example, construction techniques for the sunk well foundation, the main girder and tower （counter-balancing box beams and the body of the tower）, and inclined cables are detailed in the paper, in the course of the construction of which the internal forces and displacement of the structure are monitored to help guide the construction. The monitored results prove that the calculated and simulated construction circumstances are fundamentally in agreement with those of the practical construction. There have been no structural cracks oeeuring in the practical bridge since it was put into operation, which shows that the expected effects have been achieved.