In combination with steel box girder construction by incremental launching method, the paper introduced the construction technique of variable depth curved steel continuous box girder.
结合钢箱梁顶推实例，介绍了变高度曲线连续钢梁顶推施工技术，总结了该施工方法的经验，对类似桥梁的施工有参考价值。
Based on viaduct over airport expressway in Zhengzhou, this paper mainly expounds supervising measures about full-welding construction of steel box girder.
结合郑州跨机场路高架桥，主要阐述了全焊接钢箱梁施工的监理措施。
Construction technology and quality control measures for steel box girder, high-strength bolt, prestressed concrete box girder and inclined cable are briefly introduced.
简要介绍武汉白沙洲大桥主桥上部结构的钢箱梁、高强螺栓、预应力混凝土箱梁、斜拉索的施工工艺和质量控制措施。
But the structure commonly used in overpasses, continuous box-girder, often in construction or traffic soon cracked, directly affecting the safety and durability.
但是立交桥中常用的结构之一连续箱梁经常在施工中或通车不久就出现裂缝，直接影响桥梁的安全性与耐久性。
Prestressed concrete continuous box girder and steel-concrete composite girder are more and more adopted in construction of highway and railway.
预应力混凝土连续箱梁与钢混结合梁在公路、铁路工程中的应用越来越普及。
In this paper, some key problems of applying incremental launching in cable-stayed bridge with steel box girder are studied and discussed, for the design and construction of bridges alike.
而钢箱梁顶推施工近期应用日益广泛，但是理论研究却滞后于工程设计实际，因此，本文选择钢箱梁斜拉桥顶推施工的关键问题进行分析，为同类桥梁的设计和施工提供参考。
To some extent, the conclusions in this paper have a reference value on the box girder bridge design and construction.
本文所得出的结论在一定程度上对箱梁桥的设计和施工有参考意义。
The box girder concrete casting key point, layout of equipment and casting time control are analyzed on the base of construction performance of high quality maritime works concrete.
在研究高性能海工混凝土的施工性能的基础上，分析了箱梁混凝土浇筑关键点、设备配置和浇筑时间控制等。
It offers more exact calculation model for geometric state of stiffened box girder during construction.
为悬索桥钢箱梁吊装施工过程的线形计算提供了准确的计算模型。
To prefabricate box-girder is important in concrete cable-stayed bridge construction, it affects directly the main bridge construction of assembly progress and packing accuracy.
箱梁的预制是钢筋混凝土斜拉桥施工中的重要环节，它直接影响到主桥施工的吊装进度和拼装精度。
Based on that, a five-span prestressed composite box girder is studied, the reliability level of construction is computed in the different service period from reliability.
在此基础上，对五跨预应力组合箱梁进行了研究，从可靠度方面给出了在服役期间结构的可靠度水平。
For box girder structure which is applied extensively in bridge construction, the traditional analysis method of load is of comparatively bigger error.
由于箱梁结构广泛应用于桥梁建设中，而传统的受力分析方法存有较大的误差。
It has realistic significance to present some prevention measures and advice aiming at common quality problems lie in simple supported steel-concrete composite box girder design and construction.
针对先简支后连续的组合箱梁设计、施工中经常出现的质量通病，提出相应的防治措施及建议具有一定的现实意义。
This paper introduces the construction technique for hoisting prestressed concete box girder.
本文介绍了预应力箱梁的吊装施工技术。
The construction technique of box girder precast segment assembling by short-line method has been applied abroad, while applied in China in recent years.
短线法箱梁节段预制拼装桥梁施工技术在国外应用较多，在我国近年来也有应用。
Underwater placement of bridge's platform and cradle construction method for multi-span continuous box-girder structure constitute the construction feature of Fuyang bridge in Zhejiang province.
以水下浇筑大桥承台和采用挂篮法施工多跨连续箱梁结构是浙江富阳大桥工程的重头戏。
This paper introduces the concrete pouring of continuous box girder of main structure of the bridge and the tension construction technology.
重点介绍了该桥的主桥上连续箱梁混凝土浇筑以及张拉施工技术。
The cause of concrete crack in the construction of box girder of passenger dedicated railway line is introduced, and the relevant control measures are raised.
介绍了铁路客运专线箱梁的施工过程中，箱梁混凝土裂缝的成因，提出了相应的控制措施。
During construction of continuous box girder, line shape control is important.
连续梁施工过程中，线形控制至关重要。
The paper mainly discusses the design of construction schemes for cast in situ box girder spanning the freeway and the points for attention for construction.
主要论述了跨越高速公路现浇箱梁的施工方案设计及施工注意事项。
Prestressed construction technology of the box girder concrete of the bridge and the vacuum grouting technology;
真空压浆是后张预应力混凝土结构施工中的一项新技术，已经越来越广泛地应用于工程实践中。
The composite box girder with corrugated steel webs is a new structure applying external prestressing technique to bridge construction.
波形钢腹板组合箱梁是将体外预应力技术应用于桥梁领域的一种新的结构形式。
Now cantilever construction of prestressed concrete continuous box girder as the chief construct methord in engineering has gone intio the rang of mature.
预应力混凝土连续箱梁的悬臂施工作为大跨径桥梁的主要建设方式日渐成熟，但此类桥梁设计、施工中仍然存在着某些关键问题其处理方式比较含糊。
This paper researches the mix ratio of C55 concrete and construction technology of Xiaoshawan Bridge box girder, especially the influence of hill sand on concrete performances.
对小沙湾黄河大桥主桥箱梁C55混凝土配合比和施工工艺进行了研究，重点分析了山砂对混凝土性能的影响。
Based on construction examples, this paper introduces the calculating method of steel strands length and bend up Angle of skew box girder.
文章结合施工实例介绍了斜交箱梁铜绞线长度及弯起转角的计算方法。
According to the computing result, in the project, the construction risk of continuous steel truss is the largest, followed by box-girder slide shuttering forms and deepwater foundation.
从计算结果来看，在该项目中，连续钢桁梁施工风险最大，箱梁移动模架施工风险次之，深水基础施工风险最小。
An optimized construction method of prestressed reinforced concrete continuous box girder by using a suspended wagon is introduced.
介绍一种优化的挂篮施工方法，并对该工法优化方面进行较详细的探讨和实施。
The invention provides a method for repairing large-span post-tensioning cast-in-situ box girder cracks, relating to road engineering, in particular to the bridge construction technical field.
大跨度后张法现浇箱梁面板裂缝的修补方法，涉及道路工程，特别是桥梁施工技术领域。
The invention provides a method for repairing large-span post-tensioning cast-in-situ box girder cracks, relating to road engineering, in particular to the bridge construction technical field.
大跨度后张法现浇箱梁面板裂缝的修补方法，涉及道路工程，特别是桥梁施工技术领域。
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