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Construction method for Y-shaped frame of large-span steel box basket arch bridge

A construction method and large-span technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as failure to meet construction requirements, complex structural stress, and high construction difficulty, so as to improve quality control capabilities and reduce construction costs , significant economic benefits

Active Publication Date: 2009-06-03
THE 5TH ENG MBEC
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Problems solved by technology

Y-shaped rigid frame is a large-scale space prestressed concrete structure, the structure is complex in force, and the construction is difficult. The traditional plane support and formwork cannot meet the construction requirements.

Method used

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  • Construction method for Y-shaped frame of large-span steel box basket arch bridge
  • Construction method for Y-shaped frame of large-span steel box basket arch bridge
  • Construction method for Y-shaped frame of large-span steel box basket arch bridge

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Embodiment Construction

[0018] Below in conjunction with the embodiment of Chongqing Caiyuanba Yangtze River Bridge, the present invention will be further described in detail.

[0019] 1. First determine the structural form of the Y-shaped rigid structure:

[0020] The prestressed reinforced concrete Y-shaped rigid structure consists of a front cantilever beam 1, a rear cantilever beam 3, a middle beam 4, a front sub beam 10, a rear sub beam 5, a front main beam 7, a rear main beam 6, tie rod anchors 8 and rigid The structure-arch combination section is composed of 9 sections. The length of the front cantilever beam 1 is 73.7 meters, which is divided into 10 sections with different lengths, the longest section is 10 meters long, and the shortest section is 1.48 meters; There are 8 segments of different lengths. Among them, the longest section is 20.3 meters long, and the shortest section is 8 meters. The longitudinal inclination angle of the front cantilever beam 1 is 37.71°, and the transverse inc...

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Abstract

The invention discloses a construction method for a Y-shaped frame large-span steel box basket arch bridge. Firstly, the structural style of pre-stressed concrete spatial structure system, the vertical bridge tilt angle and horizontal bridge tilt angle of the fore-and-rear socle beams and the line-type and form of fracture thereof are confirmed and construction blocks are divided; secondly, a full-framing cast-in-place supporting structural style is determined, a formwork system is determined according to the inclined angle of the fore-and-rear socle beams, a line-type control method is determined according to the form of fracture of the fore-and-rear socle beams and concrete blocks are casted in sequence; finally, the pre-stressed concrete spatial structure system is formed. The method not only accords with the Y-shaped frame construction, but also can control the structural line-shape of the Y-shaped frame, thus having the characteristics of improving quality control ability, guaranteeing construction safety, reducing construction cost and enhancing construction progress. The large-scale pre-stressed concrete spatial structure system (Y-shaped frame) of Chongqing Caiyuanba Changjiang River Bridge constructed by the method is completely in accordance with the specification, and all technical and economic indicators meet the design requirements, thus the method has high efficiency.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a Y-structure construction method of a large-span steel box basket arch bridge which adopts a large-scale concrete structure full hall bracket pouring and a space structure system formwork installation and line shape control method. Background technique [0002] With the economic development of our country, more and more long-span bridges need to be built, and the structural forms of bridges are becoming more and more novel. The Y-shaped rigid frame is a large-scale spatial prestressed concrete structure with complex stress and high construction difficulty. The traditional planar support and formwork cannot meet the construction requirements. In order to realize pouring-in-place construction, it is necessary to have a formwork system and line shape control technology different from the full cast-in-place support and the ability to resist lateral overturning. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 罗连华彭建萍谢季军李述宝黄元群李家安莫洪柳陈爱军叶绍其赵则锋王晓敏李燕青罗文亮
Owner THE 5TH ENG MBEC
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