Construction method of large-span continuous beam closely next to existing line deep water foundation

A deep-water foundation and construction method technology, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of easy cracking on the beam surface and large span of continuous beams, and achieve fast fixed installation, good stress effect, well-designed effects

Active Publication Date: 2017-01-04
NO 1 ENG LIMITED OF CR20G
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Problems solved by technology

[0003] Although there are relatively mature construction precedents in China for the construction of double-walled steel cofferdam foundations for deep-water piers and the construction of large-span continuous beams, they are not suitable for construction of deep-water uncovered underwater bedrock and deep-water foundations, and

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  • Construction method of large-span continuous beam closely next to existing line deep water foundation
  • Construction method of large-span continuous beam closely next to existing line deep water foundation
  • Construction method of large-span continuous beam closely next to existing line deep water foundation

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Embodiment Construction

[0084] Such as figure 1Shown is a construction method of long-span continuous beams close to the existing deep-water foundation. The long-span continuous beams constructed are reinforced concrete box girders located on one side of the existing railway line; the front and rear ends of the long-span continuous beams constructed are respectively supported 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 first pier The three piers and the fourth piers are laid out from front to back along the longitudinal bridge direction of the constructed large-span continuous beam, and they are all reinforced concrete piers; the length of the constructed large-span continuous beam is greater than 100m and consists of two A side-span beam section, a mid-span beam section, and two pier top beam sections 19-5 are spliced ​​together, and the mid-span beam section is located between the...

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Abstract

The invention discloses a construction method of a large-span continuous beam closely next to an existing line deep water foundation. The large-span continuous beam to be constructed is a reinforced concrete box beam located on one side of an existing railway line, and is formed by splicing two side-span beam segments, a middle-span beam segment and two pier top beam segments. The construction method of the large-span continuous beam to be constructed comprises the steps that 1, bridge piers are constructed; 2, the pier top beam segments are constructed, specifically, pier top brackets are installed and pre-pressed, formworks are erected on the pier tops, and concrete is poured to the pier top beam segments; and 3, side-span and middle-span closure construction is carried out, specifically, after construction of the two pier top beam segments is completed, closure construction is carried out on the middle-span beam segment and the two side-span beam segments through a hanging basket. According to the method, the steps are simple, design is reasonable, construction is easy and convenient, the using effect is good, construction of the large-span continuous beam closely next to the existing line deep water foundation can be completed easily, conveniently and quickly, and the construction process is safe and reliable.

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 deep-water foundation. 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 ...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 白朋张亚强赵久远杜越严进喜石鸿江严朝锋王永丽
Owner NO 1 ENG LIMITED OF CR20G
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