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Unfolding and folding method of quickly-foldable prestressed truss bridge

A technology of prestressed and truss bridges, which is applied in the field of rapid expandable prestressed truss bridges, can solve problems such as dependence on lifting equipment and jacking equipment, inconformity with rapid construction, and slow down construction progress, so as to reduce manpower, Guarantee stability, guarantee the effect of stability

Active Publication Date: 2013-12-18
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main disadvantage of the above construction methods is that the construction process relies too much on lifting equipment and jacking equipment, and some even need to set up another support system such as scaffolding to provide support for the structure, which greatly slows down the construction progress and does not meet the requirements of rapid construction.
In addition, in order to ensure the stability of the bridge structure during the construction stage of the expandable bridge, it is often necessary to use scaffolding or cranes to provide support, which greatly reduces the construction efficiency.

Method used

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  • Unfolding and folding method of quickly-foldable prestressed truss bridge
  • Unfolding and folding method of quickly-foldable prestressed truss bridge
  • Unfolding and folding method of quickly-foldable prestressed truss bridge

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] A rapidly deployable prestressed truss bridge unfolding and collapsing method comprises the following steps:

[0021] (1) Prestressed truss bridges include bridge decks, diaphragm supports, two or more deployable prestressed steel trusses, and passive cables. The single expandable prestressed steel truss is composed of prestressed steel cables arranged in the profile, 4 truss units and 3 rotating shafts between the unit nodes.

[0022] (2) Expansion stage: if figure 1 As shown, the truss is in the folded state, taking two trusses as an example. First determine the distance between the trusses, that is, the transverse width of the bridge, fix the left end of the upper chord of the first truss unit of the two deployable trusses on the support 1, and then place the left ends of the two trusses on the transverse support 2 and the space bet...

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Abstract

The invention discloses an unfolding and folding method of a quickly-foldable prestressed truss bridge. The method includes: in the unfolding phase, pulling with a winch, directly unfolding in place, and mounting transverse partition supports to guarantee stability in the bridge construction process; in the folding phase, folding a truss according to a reasonable threading scheme of driven cables, and removing the transverse partition supports one by one during the folding process to effectively guarantee stability in the bridge folding process. The method has the advantages that dependence on large mechanical equipment during the construction process is avoided, construction is faster and more efficient, and stability in the unfolding and folding phase of the bridge is guaranteed.

Description

technical field [0001] The invention relates to a construction method of a large truss, in particular to a method for unfolding and retracting a rapidly expandable prestressed truss bridge. Background technique [0002] At present, the construction methods for large trusses at home and abroad mainly include the overall hoisting method, the overall lifting method, the overall jacking method and the sliding construction method. The overall hoisting method is a construction method that uses lifting equipment to hoist the structure in place after the overall assembly of the structure on the ground tire frame; the overall hoisting method is to assemble the whole or part of the structure on the ground, and then use hydraulic lifting equipment or lifting The method of lifting the whole or part of the structure from the bottom to the top with heavy equipment; the overall jacking method refers to the truss assembled on the ground or the floor, using the load-bearing columns of the bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D6/00E01D15/00
Inventor 夏志远董军李志鹏李靖
Owner NANJING UNIV OF TECH
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