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摘要:
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重庆朝天门长江大桥是目前世界上最大跨度的拱桥,设计无应力跨径为190m+552m+190m。从边支点向跨中悬臂安装,采取预偏施工技术,调整边、中支点高差及位移,补偿合龙口高差及位移,成功实现了桁拱跨中无应力合龙。可供类似工程施工参考。
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Chongqing Chaotianmen Yangtze River Bridge is the largest-span steel truss arch bridge in the world,the designed non-stress spans be 190 m + 552 m + 190 m,cantilever installation carried out from side bearing point to mid-span,using pre-deviation construction technique to adjusting level difference and displacement between the side and middle bearing points to compensate the level difference and displacement at the closure mouth for the final successful non-stress closure at mid-span,this method can be reference for similar works construction.
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作者简介:
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参考文献:
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[1]TB10203-2002,铁路桥涵施工技术规范[S].
[2]JTJ025-86,公路桥涵钢结构及木结构设计规范[S].
[3]铁道部大桥工程局.九江长江大桥技术总结[C].湖北:武汉测绘科技大学出版社,1996.
[4]向中富.重庆朝天门长江大桥施工控制分析报告[R].重庆:重庆交通大学,2006.
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