赵家沟大桥临时支架设计
|
摘要
新建浦东大道赵家沟大桥主桥为下承式系杆拱桥,采用先梁后拱的施工工艺,其中拱肋采用在桥面结构上搭设塔架施工的竖转提升工艺,纵、横梁及桥面板支撑采用混合支架。临时支架采用609钢管桩+贝雷梁+48小钢管组成的复合支架形式,承受桥道系结构施工时的荷载、预应力张拉引起的次效应以及竖转提升工艺所传递的荷载,受力较为复杂。采用精细化数值模拟技术对支架与结构在整个施工过程中的受力状态进行模拟,数值模拟结果及实践监测数据表明结构安全,支架的各部分构件受力满足要求,所设计的支撑柱改善了桥道系结构、贝雷梁以及钢管支架的受力状态。
The main bridge of Zhaojiagou Bridge on the newly built Pudong Avenue is a bow string tied arch bridge constructed by the process of girder first and arch later,among which the arch ribs adopt the vertical rotating and lifting technique with the assistance of lifting frames erected on the bridge deck,the stringers and cross beams and bridge deck are supported on composite scaffolds.The temporary support system is a combined system formed of the609steel piles,bailey trusses and the48small diameter steel pipes,which bears the loads of the bridge deck system during the construction process,secondary effect caused by prestress tensioning and the loads transmitted by the vertical rotating and lifting technique,therefore,the load bearing condition is complex.The refined numerical simulation technique was used to simulate the load bearing condition of the support system and structure during the whole construction process.The results of the numerical simulation and the practical monitoring data demonstrate that the structure is safe,and the load bearing capacity of each component of the support system meets the requirements and the designed supporting posts improve the load bearing condition of the bridge deck system,bailey trusses and the steel pipe scaffolds.
The main bridge of Zhaojiagou Bridge on the newly built Pudong Avenue is a bow string tied arch bridge constructed by the process of girder first and arch later,among which the arch ribs adopt the vertical rotating and lifting technique with the assistance of lifting frames erected on the bridge deck,the stringers and cross beams and bridge deck are supported on composite scaffolds.The temporary support system is a combined system formed of the609steel piles,bailey trusses and the48small diameter steel pipes,which bears the loads of the bridge deck system during the construction process,secondary effect caused by prestress tensioning and the loads transmitted by the vertical rotating and lifting technique,therefore,the load bearing condition is complex.The refined numerical simulation technique was used to simulate the load bearing condition of the support system and structure during the whole construction process.The results of the numerical simulation and the practical monitoring data demonstrate that the structure is safe,and the load bearing capacity of each component of the support system meets the requirements and the designed supporting posts improve the load bearing condition of the bridge deck system,bailey trusses and the steel pipe scaffolds.
引文
[1]JGJ 166-2008,建筑施工碗扣式脚手架安全技术规范[S].
[2]JGJ 130-2011,建筑施工扣件式钢管脚手架安全技术规范[S].
[3]JGJ 128-2010,建筑施工门式钢管脚手架安全技术规范[S].
[4]恽长安.京杭大运河横林东桥现浇系杆拱主桥施工工艺探讨[J].交通标准化,2004,(6):38-41.
[5]林荣奋.灞河大桥80m钢管混凝土拱支架体系设计与施工[J].市政技术,2011,(4):43-46.
[6]杨翼.合肥铁路枢纽128m系杆拱桥施工技术研究[J].安徽建筑,2012,(2):149-151.
[7]左松庭.钢管拱桥通航主跨系梁支架搭设及预压技术[J].四川建材,2012,(2):146-149.
[8]秦梅.贝雷片支架的变形计算[J].安徽建筑,2010,(2):118-119.
[9]王磊,李志成,杨培诚.大跨径斜拉桥索塔下横梁施工支架结构分析[J].湖南交通科技,2010,(4):46-49.
[10]刘立民,黄帆.马岭河大桥主塔下横梁施工支架设计[J].交通科技,2010,(3):26-28.
[11]魏河广,杨寿忠,王孝林,等.重庆长寿长江大桥主塔下横梁施工方案优化[J].市政技术,2009,(2):122-124.
[12]李盛泽.闽江大桥主塔下横梁施工方案优化与技术研究[J].公路交通科技,2011,(4):177-180.
[13]卜骄.东沙特大斜拉桥下横梁支架施工模拟与分析计算[J].公路,2011,(12):75-80.
[14]孔迎军.荆岳长江公路大桥主塔下横梁施工技术[J].中外公路,2010,(4):205-206.
[15]易季爰,宋达,易继武.荆岳长江公路大桥29#墩索塔上横梁施工新工艺[J].中外公路,2010,(5):190-192.
[16]胡文俊.悬空支架在高墩横梁施工中的应用[J].公路交通科技,2008,(8):110-112.
[2]JGJ 130-2011,建筑施工扣件式钢管脚手架安全技术规范[S].
[3]JGJ 128-2010,建筑施工门式钢管脚手架安全技术规范[S].
[4]恽长安.京杭大运河横林东桥现浇系杆拱主桥施工工艺探讨[J].交通标准化,2004,(6):38-41.
[5]林荣奋.灞河大桥80m钢管混凝土拱支架体系设计与施工[J].市政技术,2011,(4):43-46.
[6]杨翼.合肥铁路枢纽128m系杆拱桥施工技术研究[J].安徽建筑,2012,(2):149-151.
[7]左松庭.钢管拱桥通航主跨系梁支架搭设及预压技术[J].四川建材,2012,(2):146-149.
[8]秦梅.贝雷片支架的变形计算[J].安徽建筑,2010,(2):118-119.
[9]王磊,李志成,杨培诚.大跨径斜拉桥索塔下横梁施工支架结构分析[J].湖南交通科技,2010,(4):46-49.
[10]刘立民,黄帆.马岭河大桥主塔下横梁施工支架设计[J].交通科技,2010,(3):26-28.
[11]魏河广,杨寿忠,王孝林,等.重庆长寿长江大桥主塔下横梁施工方案优化[J].市政技术,2009,(2):122-124.
[12]李盛泽.闽江大桥主塔下横梁施工方案优化与技术研究[J].公路交通科技,2011,(4):177-180.
[13]卜骄.东沙特大斜拉桥下横梁支架施工模拟与分析计算[J].公路,2011,(12):75-80.
[14]孔迎军.荆岳长江公路大桥主塔下横梁施工技术[J].中外公路,2010,(4):205-206.
[15]易季爰,宋达,易继武.荆岳长江公路大桥29#墩索塔上横梁施工新工艺[J].中外公路,2010,(5):190-192.
[16]胡文俊.悬空支架在高墩横梁施工中的应用[J].公路交通科技,2008,(8):110-112.