内河航道桥梁整体顶升适用性研究

Applicability Study on Bridge Integral Jack-up for Inland Waterways

以交通运输"十二五"规划中的内河航道整治升级为背景,对苏州地区部分干线航道桥梁的桥型进行了统计分析。根据整体顶升对桥梁结构受力变化的影响,探讨了几种桥型在整体顶升过程中桥梁结构的安全适用性。同时,根据航道桥梁整体顶升工程造价的相关计算方法,以苏南运河平望运河大桥为工程背景进行整体顶升投资造价测算,分析了整体顶升技术的经济适用性。结果表明:整体顶升技术在内河航道桥梁改造工程中具有良好的适用性。

Based on the background of remediation and upgrades of inland waterways in twelfth five-year plan of transporta- tion,statistical analysis of bridge type of main trunk waterways was carried out. Structural safe applicability for several bridge types was discussed according to mechanical effect of bridge structure because of integral jack-up. At the same time,on the basis of the Pingwang Canal Bridge on Sunan Canal,the related project cost calculated method of waterway bridges was used to analyze economic applicability of integral jack-up. The results showed that integral jack-up technology was applicable for inland waterway bridges’ remediation and upgrades.