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Construction method for steel box formwork of gate-type pier overcrossing existing line

A line door and steel box technology, which is applied in the field of bridge engineering, can solve the problems of high cost of steel cover beams, and achieve the effects of overcoming high cost, shortening construction period, and improving durability

Pending Publication Date: 2022-07-12
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of steel cover beams is high and has little impact on existing lines. The coating of steel cover beams requires regular maintenance

Method used

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  • Construction method for steel box formwork of gate-type pier overcrossing existing line
  • Construction method for steel box formwork of gate-type pier overcrossing existing line
  • Construction method for steel box formwork of gate-type pier overcrossing existing line

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Embodiment Construction

[0046] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0047] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application shall have the usual meanings understood by those with ordinary skills in the field to which the present application belongs. "First", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connec...

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Abstract

The invention provides a construction method for a steel box template of an overpass existing line gate type pier, which comprises the following steps of: longitudinally segmenting a to-be-constructed steel box template according to a first preset requirement, and dividing the to-be-constructed steel box template into two steel support leg sections and a plurality of steel cross beam sections; the two steel supporting leg sections and the multiple steel cross beam sections are spliced to form a gate-type pier steel box formwork body; two pier columns are installed at preset positions, and an embedded steel cylinder is installed at the top of each pier column; hoisting the gate-type pier steel box template main body until the gate-type pier steel box template main body is connected with the embedded steel cylinder; a bent cap steel bar, a prestressed steel strand and a prestressed pipeline are installed in the gate-type pier steel box formwork body; performing concrete pouring on the gate-type pier steel box template main body in batches according to a second preset requirement; and synchronously carrying out pre-stress construction on the pre-stress steel strands in batches. The steel box formwork is adopted as a concrete cast-in-place support, the steel box formwork and part of steel bars are hoisted synchronously, the construction period is greatly shortened, the safety risk is greatly reduced, and compared with a steel cover beam, the manufacturing cost is low, and durability is high.

Description

technical field [0001] The present application relates to the technical field of bridge engineering, and in particular, to a method for constructing a steel box formwork for a portal pier on an existing line on the upper span. Background technique [0002] Prestressed concrete beams and steel box beams are used for the existing upper-span existing line portal piers, and the prestressed concrete beams are installed by cast-in-place brackets or prefabricated; the steel box beams are installed in place by a large crane at one time. [0003] ①Bracket cast-in-place method; cast-in-place brackets are erected above the existing lines, and templates are directly installed on the brackets, the steel skeleton is bound, and the holes are reserved. The method of pouring concrete on site and applying prestressing has a long construction period, and it generally takes 60 days from the erection of the support to the completion of dismantling. When constructing above the existing line, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D101/28
CPCE01D21/00E01D2101/28
Inventor 尚鹏军刘生秀吉帅科刘招伟林泽刘兴凌建琦韩亚旭曹向阳赵昆峰
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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