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Construction method suitable for closing cantilever beam of continuous steel structure in loess area

A construction method and cantilever technology, applied to bridges, bridge construction, erection/assembly of bridges, etc., to achieve the effects of reducing conversion time, reducing safety hazards, and reducing maintenance costs

Active Publication Date: 2022-01-25
中建七局交通建设有限公司 +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a construction method suitable for the closing of continuous steel cantilever girders in loess areas, which effectively solves the problem of the closing sequence of continuous rigid cantilever beams and reduces the number of main bridges. The time for system conversion reduces the maintenance cost of workers and the rental time of machinery, greatly reduces the potential safety hazards of bridge construction, and achieves the goal of shortening the construction period and ensuring construction quality and safety

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  • Construction method suitable for closing cantilever beam of continuous steel structure in loess area
  • Construction method suitable for closing cantilever beam of continuous steel structure in loess area
  • Construction method suitable for closing cantilever beam of continuous steel structure in loess area

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Embodiment Construction

[0016] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] Construction steps of the present invention include:

[0018] Step 1: Construction of No. 0 beam section: The load-bearing of the bracket is designed according to two pourings. The embedded parts are constructed during the last two stages of the double thin-walled piers, and the tower crane is used for hoisting on site. The 0# box girder is poured twice. Pre-buried the bracket φ32 chamfered corbel reinforcement and 5cm PVC pipe on the top of the pier, and reserved the slot position. During the installation, first penetrate the φ32 fine-rolled rebar to install the joists, then lay the I-steel longitudinal and beams, and set up the buckle-type brackets with a spacing of 90x90cm. Secondly, temporary buttresses are used at the top of the side-span consolidation pier, and the cross-section of the pier is 1.2. There ar...

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Abstract

The invention relates to a construction method suitable for the closure of continuous steel cantilever beams in loess areas; the technical solution includes the construction of No. Embedded parts are hoisted by tower crane on site, the 0# block box girder is poured twice, the cantilever pouring section is constructed, the mid-span closing section, the side-span casting-in-place section, the side-span closing section, and the second mid-span closing section.

Description

technical field [0001] The invention relates to the field of construction of continuous rigid frame bridges in loess areas, in particular to a construction method suitable for continuous rigid frame cantilever beams in cold weather in loess areas. Background technique [0002] The construction process of the cantilever beam of the continuous rigid frame bridge is generally the construction of the bracket of the No. 0 beam section of the main bridge, the construction of the 1#-15# beam section of the main bridge hanging basket circular cantilever pouring, the construction of the side pier bracket and side span cast-in-place section, and the whole bridge is closed. The pouring sequence of the sections is as follows: the first side span, the second mid-span, and the last mid-span are closed in sequence. The continuous rigid frame bridges in the loess area of ​​Northwest China often cross gullies to form river valleys, and the height of pier columns exceeds 80m. It is complicate...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/10
CPCE01D21/10E01D21/105
Inventor 杨伟齐宁宁许保生吴靖江陈小羊张永松申长城胡连超韩亚光张文秦亚丽李轾段中华
Owner 中建七局交通建设有限公司