Construction method for hoisting broad width steel box girder cantilever

A construction method and technology of steel box girders, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as large deformation of steel box girders, difficulty in ensuring construction quality and construction period, and difficulty in aligning steel box girders , to achieve the effect of improving construction efficiency, shortening construction period and improving construction quality

Active Publication Date: 2010-06-16
CHINA COMM ROAD & BRIDGE NORTH CHINA ENG +2
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  • Application Information

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Problems solved by technology

[0003] The common installation methods of steel box girders include cantilever hoisting method, jack-up method, full support floating hoisting hoisting method, etc. When the bridge spans an uninterrupted transport river, the cantilever construction method is undoubtedly an ideal method; however, for The two-way eight-lane wide steel box girder adopts cantilever hoisting during the construction process. Due to the large deformation of the steel box girder due to its own weight

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  • Construction method for hoisting broad width steel box girder cantilever
  • Construction method for hoisting broad width steel box girder cantilever
  • Construction method for hoisting broad width steel box girder cantilever

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Embodiment Construction

[0049] The method of the present invention will be described in detail below in conjunction with the accompanying drawings and through specific embodiments.

[0050] A bridge is a cable-stayed bridge with single-column leaning tower space torsion cables and hybrid girders. The span of the main navigation hole is 109+188+88m, of which 188+88m is 22 segmental steel box girders with a width of 44m and a height of 3.5m, is a wide steel box girder. Among them, the self-weight of the steel box girder of the 3-14# standard section is about 288 tons, and the maximum self-weight of the 15-20 beam section is about 331 tons. The overall hoisting construction of the steel box girder is that sections 1, 2, and 15 to 22 are hoisted and slipped into place with full brackets, and the steel box girder of the standard section 3 to 14 adopts the method of the present invention and is hoisted and adjusted by a DQP200t cantilever crane. bit.

[0051] see figure 1 As shown, a kind of wide steel ...

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Abstract

The invention relates to a construction method for lifting a broad width steel box girder cantilever. A cantilever lifting machine is installed on a finished bridge segment, a steel box girder to be lifted and installed is transported below the position to be installed by a girder transportation ship, and loading tentative lifting is carried out on the lifting machine by utilizing the steel box girder; the steel box girder is lifted to a bridge deck set elevation by the cantilever lifting machine, secondary tensioning is carried out on a stay cable of the finished bridge segment located by the cantilever lifting machine, and then axial-direction bridge deviation regulation, direction across bridge deviation regulation, girder segment elevation regulation and girder segment deformation regulation are carried out on the lifted steel box girder; the lifted steel box girder and the finished bridge segment are in whole section welding, hanging and first tensioning are carried out on the stay cable of the lifted girder segment, and then holding load is discharged by the cantilever lifting machine; and a next steel box girder is lifted by repeating the steps.

Description

technical field [0001] The invention relates to a method for hoisting steel box girders during bridge construction, in particular to a construction method for cantilever hoisting of wide steel box girders. Background technique [0002] In order to solve the congestion problem of urban traffic, urban planning has increased the traffic capacity of roads and bridges. At present, two-way eight-lane bridges have appeared; according to the needs of urban construction, many bridges use wide-width The steel box girder is the main light girder structure. In order to improve the service life of the bridge, the wide steel box girders adopted are all orthotropic structures. [0003] The common installation methods of steel box girders include cantilever hoisting method, jack-up method, full support floating hoisting hoisting method, etc. When the bridge spans an uninterrupted transport river, the cantilever construction method is undoubtedly an ideal method; however, for The two-way ei...

Claims

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Application Information

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IPC IPC(8): E01D21/00B66C23/20
Inventor 彭立志应虹田连民李勇阎王虎王俊伟檀兴华樊俊丽
Owner CHINA COMM ROAD & BRIDGE NORTH CHINA ENG
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