Construction method for long-span continuous beam neighboring existing lines

A construction method, a large-span technology, used in bridges, bridge construction, erection/assembly of bridges, etc.

Active Publication Date: 2017-01-25
CHINA RAILWAY 20 BUREAU GRP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Although there are relatively mature construction precedents in China for the construction of double-wall steel cofferdam foundations for deep-water piers and the construction of large-span continuous beams, they are still relatively rare with a distance of only 30m from the existing business line, and the continuous span of the main span of the bridge reaches 168m. Beam cantilever construction is still very rare in China

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  • Construction method for long-span continuous beam neighboring existing lines
  • Construction method for long-span continuous beam neighboring existing lines
  • Construction method for long-span continuous beam neighboring existing lines

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Embodiment Construction

[0070] Such as figure 1A construction method of a long-span continuous beam close to the existing railway line is shown, the long-span continuous beam constructed is a reinforced concrete box girder located on one side of the existing railway line; the front and rear ends of the long-span continuous beam constructed are respectively supported on the On the first pier and the fourth pier, a second pier and a third pier are arranged between the first pier and the fourth pier, the first pier, the second pier, the third pier The pier and the fourth pier are arranged from front to back along the longitudinal bridge direction of the large-span continuous beam constructed, and they are all reinforced concrete pier; the length of the large-span continuous beam constructed is greater than 100m and it consists The span beam section, a mid-span beam section and two pier top beam sections 5 are spliced ​​together, the mid-span beam section is located between the second support pier and th...

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Abstract

The invention discloses a construction method for long-span continuous beam neighboring existing lines. The long-span continuous beam in construction refers to reinforced concrete box girder located on one side of existing railway lines; the long-span continuous beam in construction is jointed by two side span beam sections, one medium span beam section and two pier top beam sections and the medium beam section is connected with the side span beam sections by two pier top beam sections; the construction of the long-span continuous beam comprises the steps of 1, pier top beam section construction in the process of pier top bracket installation, pier top bracket prepressing, pier top formwork and pier top beam section concrete pouring construction; 2, side span and median span in closure construction: after construction of two pier top beam sections is completed, cradle is applied to make closure construction of the median span beam section and the two side span beam sections. The construction method for long-span continuous beam neighboring existing lines has simple steps, reasonable design, convenient construction, and good effects of application, which can conveniently and quickly complete long-span continuous beam construction in safe and reliable process of construction.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method of a large-span continuous beam adjacent to an existing line. Background technique [0002] At present, my country's railway bridge construction is in a period of rapid development. The use of advanced design and construction technology to achieve the goal of saving investment, shortening the construction period and ensuring safety has always been the result pursued by the engineering community. Among them, in the construction of long-span and deep-water bridges, the design theory, construction technology and equipment have reached or approached the world's advanced level. For example, in the continuous girder construction of the new second-line new Yongjiang Bridge in Nanning Railway Hub, the main span of the bridge reaches 168m, which is the largest span among single-line railway bridges in China. The construction safety risk of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10E01D2/00
CPCE01D2/00E01D21/10
Inventor 仲维玲丁大有李洁勇王克俭
Owner CHINA RAILWAY 20 BUREAU GRP
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