Method for adjusting bridge deck line shape of large-span deck arch bridge in operation period high-speed rail

An adjustment method and linear technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as threats to structural safety, to ensure structural stress safety, ensure driving safety and comfort, significant promotion significance and application prospects Effect

Active Publication Date: 2021-04-27
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of mature experience and norms as a basis, if a certain support is directly lifted and adjusted to the original design line shape, its related components such as arched beams (piers), track structures and arch rings may be affected by local forces. Oversized and disruptive, threatening the safety of the entire structure

Method used

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  • Method for adjusting bridge deck line shape of large-span deck arch bridge in operation period high-speed rail
  • Method for adjusting bridge deck line shape of large-span deck arch bridge in operation period high-speed rail
  • Method for adjusting bridge deck line shape of large-span deck arch bridge in operation period high-speed rail

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Embodiment 1

[0031] For example, taking the Meixi River Bridge of the Zhengzhou-Wanzhou High-speed Railway as an example, the bridge has a total length of 687.80m and a design speed of 350km / h. The main bridge adopts a 1-340m top-supporting reinforced concrete arch bridge with a rise height of 74m. The span layout of the approach bridge and the arch is: 2-65m T structure + (30.40+2-29.60+29.60)m prestressed concrete continuous beam + (4 -29.60)m prestressed concrete continuous beam+(29.60+2-29.60+30.40)m prestressed concrete continuous beam+(44+72+44)m prestressed concrete continuous beam. The main girder on the arch adopts a prestressed concrete continuous beam structure with 12 holes in three joints, each continuous beam with 4 holes is made of C50 concrete, the columns on the arch are C40 concrete portal frame piers, and the arch ring is made of C55 reinforced concrete.

[0032] The bridge is constructed using the rigid skeleton method, with complicated procedures and multiple transform...

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Abstract

The invention provides a method for adjusting the bridge deck line shape of a large-span deck type arch bridge of high-speed rail in the operation period. A real-time judgment method for adjusting the bridge deck line shape of the large-span arch bridge of the high-speed rail based on monitoring data is provided by starting from operation driving safety and comfort, the relation between the structural deformation and the driving safety / comfortableness in the operation period of the high-speed rail large-span arch bridge is established, so that the driving safety and comfort of the large-span arch bridge in the operation period are effectively ensured; the multi-point coupling effect problem caused by a large number of arch bridge components is fully considered, the support heightening amount and heightening procedure in the high-speed rail large-span arch bridge operation period are provided from the perspective of structural safety, the problem that no specific heightening scheme exists in the large-span deck type arch bridge operation period is solved while the structural stress safety in the heightening process is guaranteed, and the method has great popularization significance and application prospects.

Description

technical field [0001] The invention belongs to the technical field of railway bridge operation and maintenance, and in particular relates to a method for adjusting the deck alignment of a high-speed railway large-span overhead arch bridge during the operation period. Background technique [0002] Track smoothness is an important guarantee for the safety and comfort of high-speed railways. Concrete arch bridges have gradually become a mainstream structural form of railway long-span bridges (spans greater than 100m) due to their large spanning capacity, high horizontal and vertical stiffness, and good environmental adaptability. In the southwestern region, the Beipanjiang Bridge (main span 445m) of the Shanghai-Kunming Passenger Railway, the Nanpanjiang Bridge (main span 416m) of the Yunnan-Guizhou Railway, and the Yelang River Bridge (main span 370m) of the Yugui Railway have been built successively. Many long-span railway arch bridges. However, due to the mechanical chara...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor杨国静陈克坚曾永平颜永逸宋晓东
OwnerCHINA RAILWAY ERYUAN ENG GRP CO LTD