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Closing construction method for steel bar-concrete superposed beam cable-stayed bridge

A technology of closing dragons and tools, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc. It can solve the problems of high control precision requirements, low safety assurance coefficient, and difficulty in guaranteeing construction quality, and achieve lower control accuracy requirements and safety assurance coefficients. High efficiency and high construction efficiency

Active Publication Date: 2013-06-12
CCCC FIRST HIGHWAY XIAMEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The natural cooling method or the method of controlling the closing state is a passive control method, which is greatly affected by time and ambient temperature, and requires high control precision for the closing state. The waiting time for closing construction is long, the process organization is discontinuous, and the construction efficiency is low.
[0004] The safety guarantee factor is low, and the permanent splicing board is used for direct closure construction, which is heavy, difficult for hoisting construction, and high installation risk
Limited by the location and size of the openings of the permanent splicing panels, the success rate of closure is low and the safety risk is high
[0005] Both the natural cooling method and the method of controlling the closing state require a large number of closing and pressing facilities or large-tonnage tensioning and pushing equipment. The construction process is many, the cost is high, and the construction quality is difficult to guarantee
And it is easy to cause cracks in the wet joints of the bridge deck, which is not conducive to the safety of the bridge structure

Method used

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  • Closing construction method for steel bar-concrete superposed beam cable-stayed bridge
  • Closing construction method for steel bar-concrete superposed beam cable-stayed bridge
  • Closing construction method for steel bar-concrete superposed beam cable-stayed bridge

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Effect test

Embodiment 1

[0043] see figure 1 , the structure of tool splicing plate 1 of the present invention is as follows:

[0044] It is a rectangle, half of which is provided with circular holes 11, there are 4 rows, 4 in each row, and the other half is provided with 4 rows of oval holes 12, 2 in each row, wherein, the position and size of the circular holes and the bridge The drilling holes on the I-shaped main stringer 3 are consistent, but the quantity is less than the fixed holes on the I-shaped bridge stringer 3 (4 rows are arranged on the I-shaped bridge stringer 3, and each row is 7); Shaped holes 12 correspond to the spaced fixed holes on the I-shaped main longitudinal girders 3 of two rows of bridges, and the length direction of the oval holes 12 is from left to right (ie the longitudinal direction of the bridge).

[0045] see image 3 , the tool splicing plate 2 of the present invention is similar to the tool splicing plate 1, but its row number is 7 rows. There are four circular hol...

Embodiment 2

[0048] The timing construction method of the steel-mixed composite girder cable-stayed bridge of the present invention mainly includes the following parts:

[0049] Construction process of the present invention is as follows:

[0050] (1) Use the corresponding measurement and test methods to continuously observe the attitude of the Helongkou two beam sections in advance.

[0051](2) According to the data obtained from continuous observation, the main longitudinal beam and the tool splicing plate of the closing section are blanked and manufactured in advance. Among them, the elliptical hole is provided with a bolting margin of 20-30mm, which is used for the temporary splicing of the closing beam section and the cut-end steel main beam when the mid-span closing is completed;

[0052] (3) Arrange corresponding weights at the Helongkou and adjust the posture of the Helongkou.

[0053] (4) The bridge deck crane is used for hoisting and assembling construction of the main longitud...

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Abstract

A closing construction method for a steel-concrete superposed beam cable-stayed bridge comprises the following steps: manufacturing a handy elliptical hole tool splicing plate, closing at a fixed time, tool splicing plate temporarily fixing construction, construction of a permanent splicing plate replacing tool a splicing plate, and the like. According to the invention, the construction of the handy elliptical hole tool splicing plate is adopted for accomplishing timed closing construction to the steel-concrete superposed beam cable-stayed bridge, and then in-plant punching manufacture and on-site replacement construction are performed on the permanent splicing plate according to the position size of a blot hole of the closed tool splicing plate, so as to achieve midspan closing. The orderliness and the definitiveness of organization of closing construction procedures can be enhanced, the construction efficiency is improved, and construction quality and safety are ensured.

Description

technical field [0001] The invention relates to a timing closing construction method of a steel-mixed composite girder cable-stayed bridge, especially under unfavorable environmental conditions, which can quickly and orderly complete the mid-span closing construction of a steel-mixed composite girder cable-stayed bridge, and can effectively Construction methods to ensure construction quality, progress and safety. Background technique [0002] In recent years, with the continuous increase of national infrastructure construction, the construction of cable-stayed bridges across rivers and seas has also increased. In the construction of mid-span closures of bridge superstructures, natural cooling methods or methods of controlling the state of closures are usually used. There are following problems in this construction method: [0003] The natural cooling method or the method of controlling the closing state is a passive control method, which is greatly affected by time and ambi...

Claims

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Application Information

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IPC IPC(8): E01D21/10
Inventor 谢泽福王明銮易云焜吴小海
Owner CCCC FIRST HIGHWAY XIAMEN ENG
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