摘要
针对悬链形上加劲连续钢桁梁桥建造,提出不带加劲弦多点同步顶推施工技术,在边跨设置拼装平台,在中跨设置临时墩,分段拼装,顶推钢桁梁,最后吊装合龙加劲弦。在施工中,设置大临结构,以减小钢桁梁的悬臂长度,适应了钢桁梁拼装及顶推装置布置的要求;采用同步控制系统与纠偏装置,解决了多点同步顶推与钢桁梁线性控制的难题;通过有限元仿真分析,验证了顶推过程的可行性;采用落梁法,解决了钢桁主梁合龙及加劲弦合龙的难题。
Aiming at the construction of catenary stiffening continuous steel truss girder bridge,the construction technology of multi-point synchronous jacking without stiffening chord is put forward.The assembly platform is set up in the side span,the temporary pier is set up in the middle span,the steel truss girder is jacked up in sections,and the stiffening chord is finally hoisted.In the construction,the large temporary structure is set up to reduce the cantilever length of the steel truss girder and meet the requirements of the assembly of the steel truss girder and the arrangement of the jacking device.The synchronous control system and deviation correction device are used to solve the problem of multi-point synchronous jacking and linear control of steel truss girder.The feasibility of the pushing process is verified by finite element simulation analysis.The problem of closure of steel truss girder and stiffening string is solved by using the falling beam method.
作者
廖菲
LIAO Fei(China Railway Major Bridge Engineering Group Co.,Ltd.,Wuhan,Hubei430050,China)
出处
《施工技术（中英文）》
CAS
2024年第4期114-120,共7页
Construction Technology
关键词
桥梁工程
钢桁梁
加劲弦
顶推
落梁法
施工技术
bridges
steel truss girders
stiffening chords
incremental launching:girders hoisting method
construction
