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Cable-stayed bridge mid-span bilateral simultaneous closing construction method

A cable-stayed bridge, bilateral technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as immaturity and impact on construction quality, and achieve the effect of saving man-hours and convenient operation

Active Publication Date: 2017-10-13
THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the construction technology is not mature enough, especially for this type of closing construction process, the two sides of the closing section are constructed separately, and the shrinkage of the bilateral steel beams will be different due to the different construction temperatures on both sides. Generate additional internal force and affect construction quality

Method used

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  • Cable-stayed bridge mid-span bilateral simultaneous closing construction method

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Embodiment Construction

[0031] Attached below figure 1 A preferred embodiment of the present invention will be described in detail.

[0032] Taking a 37-segment steel girder bridge mid-span steel girder closure construction as an example, the mid-span length of the cable-stayed bridge is 430m, and the closing section steel girder length is 2.58m. In the invention, the double-sided steel beams are simultaneously closed for construction, and the counterweight method is used to eliminate the torsion caused by the simultaneous lifting of the steel beams, thereby realizing the construction of the middle-span steel beams of the cable-stayed bridge, improving the precision of the closing, and reducing the closing of the middle-span steel beams The construction time reduces the risk. The specific measures are as follows:

[0033] (1) Closing Dragon Principle

[0034] The erection sequence of steel beams in the closure section is longitudinal beams-cross beams-small longitudinal beams-brackets, and a closed and s...

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Abstract

The invention provides a cable-stayed bridge mid-span bilateral simultaneous closing construction method. The method includes the steps of closing section matched cutting, balance weight construction, steel beam mid-span closing and system conversion. The method aims at achieving the purpose that mid-span steel beam closing is completed within required time and avoiding the situation that a bilateral steel beam suffers from shrinkage change due to different temperatures, so that the closing precision of the steel beam is affected. Bilateral simultaneous closing construction is adopted for the cable-stayed bridge mid-span steel beam, operation is convenient, man hours are saved, compared with a traditional method, scene machines can be fully utilized, additional internal force generated by unilateral steel beam hoisting is avoided, the installing precision is improved, and safety risks are reduced.

Description

Technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for simultaneous closure construction of both sides of a cable-stayed bridge mid-span. Background technique [0002] In recent years, domestic requirements for the appearance of urban facilities have become higher and higher, and urban bridge designs have become diversified. Bridge construction must not only meet its basic functional requirements, but also comprehensively consider factors such as geography, environment, humanities, and aesthetics. [0003] Steel structure has been widely used in railways, rivers and lakes, large-span, large-space urban bridges. The steel-concrete composite beam is a new type of structure developed on the basis of steel structure and concrete structure. At present, the construction process is not mature enough, especially for this type of closure construction process. The closure section is constructed separately on both sides, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 李定有丁得志狄为民查小林周海峰张德胜
Owner THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP