One-time overhang construction method for full section of box girder of long-span girder bridge

A construction method and a full-section technology, applied in bridges, bridge construction, bridge materials, etc., can solve the problems of setting interlayer construction joints and long construction periods, and achieve fast formwork installation and removal, light weight, and reduced deformation Effect

Active Publication Date: 2021-05-25
湖南交通国际经济工程合作有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a one-time cantilevered construction method for the full section of the box girder of a long-span girder bridge, which effectively solves the need to set interlayer construction joints and construction period in the previous layered pouring process The disadvantage of being too long ensures the construction quality of the box girder

Method used

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  • One-time overhang construction method for full section of box girder of long-span girder bridge
  • One-time overhang construction method for full section of box girder of long-span girder bridge
  • One-time overhang construction method for full section of box girder of long-span girder bridge

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Embodiment

[0045] Embodiment: A kind of cantilevered construction method for the full section of the box girder of a long-span girder bridge, refer to figure 1 , 2 , 3, 4, 5, including the following steps:

[0046] a. The hanging basket is installed in place

[0047]The hanging basket is the main carrier of the load-bearing and formwork structure of the box girder full-section one-time cantilevered construction. The hanging basket includes the main truss 1, the suspension and anchoring system 2, the formwork system 3 and the walking system 4. Both the main truss 1 and the formwork system 3 move back and forth through the walking system 4 . The main truss 1 is the main load-bearing structure of the cantilever construction of the box girder. The main truss 1 is an isosceles trapezoidal truss structure. The diagonal brace 14 is located between the upper crossbar 11 and the lower crossbar 12, and the two ends of the diagonal brace 14 are respectively fixed to the upper crossbar 11 and the...

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Abstract

The invention discloses a one-time cantilevered construction method for the full section of a box girder of a long-span girder bridge, belonging to the technical field of bridge construction. The construction method comprises the steps of installing a hanging basket in place; setting up a mold for the hanging basket; binding steel bars, prestressed steel bars and pipes Installation; installation and reinforcement of inner formwork; concrete warehousing and material distribution system installation beam section concrete cantilever symmetrical pouring; The invention solves the drawbacks of the previous step-by-layer pouring process that construction joints between layers need to be provided and the construction period is too long, and ensures the construction quality of the box girder.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a one-time cantilevered construction method for the entire section of a box girder of a long-span girder bridge. Background technique [0002] When crossing large valleys and large rivers, the design scheme of long-span prestressed concrete box girder bridges (continuous rigid frame, continuous box girder, etc.) is often used. The height of the beam section at the root of the upper frame box girder is generally about 10m, and the maximum height has reached 14.5m at present. The box girder often adopts the construction method of hanging basket hanging cast. For the box girder section in the root area, due to its large height and narrow operating space, there are difficulties in placing concrete in the warehouse, distributing materials, and vibrating. The comprehensive performance requirements of concrete are high. Hanging basket Rigidity requirements are large and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/10E01D101/28
CPCE01D21/10E01D2101/28
Inventor 吴初平周强蔡纲陆灿根曾旎萍
Owner 湖南交通国际经济工程合作有限公司
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