Construction method for pushing and furling complete bracket of steel box girders

A construction method and steel box girder technology, applied in bridges, bridge forms, bridge construction, etc., can solve problems such as steel box girders that cannot overcome atmospheric temperature changes, violent collisions of closing sections, and affecting construction progress, so as to save mechanical materials, The effect of improving precision and improving work efficiency

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

AI Technical Summary

Problems solved by technology

The steel box girder of the forced closing method takes a long time to precisely position a single beam section and complete the welding of the girth seam, which affects the construction progress; the hoisting space of the closing section of the natural closing method is small, and the closing section is prone to violent collisions, which not only affects the construction quality, but also affects...

Method used

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  • Construction method for pushing and furling complete bracket of steel box girders
  • Construction method for pushing and furling complete bracket of steel box girders
  • Construction method for pushing and furling complete bracket of steel box girders

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Embodiment Construction

[0040] see figure 1As shown, a kind of side-span steel box girder full support push-up construction method provided by the present invention comprises the following steps:

[0041] Step 1: Erect the side-span full support

[0042] Step 2: Hoisting and welding side-span steel box girders

[0043] Step 3: Hoisting the steel box girder of the main span and the steel box girder of the closing section

[0044] Step 4: Carry out the second corrective cutting of the beam length of the closing section

[0045] Step 5: Push and close the side span as a whole

[0046] For the sake of illustration, please combine figure 2 As shown, eight side-span steel box girders erected on No. A pier 2 to No. B pier 3 are closed with the main span as an example to describe the construction method of the present invention in detail. Among them, No. B Pier 3 is located on the bank, and No. A Pier 2 is located in the middle of the river near the closed section. The eight side-span steel box girders...

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Abstract

The invention relates to a construction method for pushing and furling a complete bracket of steel box girders, which comprises the following steps: (1) erecting a side span complete bracket; (2) lifting and welding each side span steel box girder to form a whole; (3) lifting a main span steel box girder and a furling section; (4) modifying and cutting the girder length of the furling section; and (5) pushing and furling the whole of the side span steel box girders. The invention has simple bracket form and quick construction, enhances the construction quality and can also shorten the construction period.

Description

technical field [0001] The invention relates to a bridge closure technology, in particular to a construction method applied to the closure of side-span steel box girders and main-span steel box girders of cable-stayed bridges. Background technique [0002] The difficulties in the installation of steel box girders of cable-stayed bridges are mainly the installation and closing construction under unfavorable geological conditions, especially the structural internal force, elevation, and beam length of steel box girders under the influence of temperature differences are constantly changing, which adds more unfavorable conditions to the construction . There are generally two closing construction methods for conventional steel box girders, natural closing method and forced closing method. The natural closing method is to adjust the side span to the design position before hoisting the closing section and weld it as a whole, hoist the closing section at the closing temperature, an...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D2/04E01D11/04
Inventor 彭立志应虹阎王虎田连民王俊伟王明诚檀兴华樊俊丽
Owner CHINA COMM ROAD & BRIDGE NORTH CHINA ENG
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