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Connection and closure method for inner flanges of concrete-filled steel tube arch bridge and inner flange

A technology of steel pipe concrete and inner flanges, which is applied in the direction of arch bridges, connecting members, bridges, etc., can solve the problems of changing the stress state of steel pipe arch ribs, the failure of closing segments to enter the installation space, and the difficulty in the size of closing segments, etc., to achieve dimensional accuracy The effect of low requirements, shortening the closing time, and ensuring the closing quality

Inactive Publication Date: 2021-04-27
THE 3RD ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when closing, it will be more difficult to determine the size of the closing section than the above-mentioned traditional steel pipe arch rib closing method. The bolt connection needs to be close to each other without gaps, otherwise there will be changes in the design of the steel pipe arch rib when closing. stress state
And if there is no gap at all, there will be a contradiction that the closing segment cannot enter the installation space

Method used

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  • Connection and closure method for inner flanges of concrete-filled steel tube arch bridge and inner flange
  • Connection and closure method for inner flanges of concrete-filled steel tube arch bridge and inner flange
  • Connection and closure method for inner flanges of concrete-filled steel tube arch bridge and inner flange

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Embodiment 1

[0023] Such as figure 1 and 2 As shown, the embodiment of the present invention provides a method for closing the inner flange connection of a concrete-filled steel tube arch bridge, comprising the following steps:

[0024] Step 10: Before installation, one end of the inner flange of the closing segment is not fixed and retracted to the preset length in the main pipe;

[0025] The design of the preset length can be freely adjusted by those skilled in the art according to different scenarios in the construction process, so that after the closed section enters the installation space, the fixed inner flange can be fixedly connected with the installed inner flange of the non-closed section , so as to ensure sufficient clearance for the closing segment to enter the installation space.

[0026] For the convenience of description, the inner flange of the closed section is set as the active flange, and the inner flange of the installed non-closed section is set as the fixed flange, ...

Embodiment 2

[0035] Such as image 3 and 4 As shown, the embodiment of the present invention also provides an inner flange, which is applied to the connection and closure of the steel pipe concrete arch bridge, including a flange, a liner pipe installed in the middle of the flange, and the flange and the inner flange respectively. The rib plate fixedly connected to the liner and the bolt holes distributed on the flange; the nozzle of the liner is fixedly connected to and penetrates through the round hole of the flange, and the diameter of the round hole of the flange is Same diameter as the orifice of the liner.

[0036] Preferably, the bolt holes are evenly distributed on the flange.

[0037] For the specific construction process, reference may be made to the first embodiment above, which will not be repeated here.

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Abstract

The invention belongs to the field of bridge construction, and provides a connection and closure method for inner flanges of a concrete-filled steel tube arch bridge and the inner flange. The method mainly comprises the steps that before installation, one end of an inner flange of a closure segment is not fixed and retracts to the preset length in a main pipe; after the closure segment enters the mounting space, the other end of the inner flange of the closure segment and an inner flange of an installed non-closure segment are fastened and pulled together through long bolts, and the long bolts are replaced with permanent connecting bolts one by one; and when the closure temperature condition meets the specified requirement, people can be arranged to annularly and symmetrically complete welding of a rib plate of the inner flange of the closure segment and the inner wall of the main pipe at intervals, closure is completed; and finally, welding of an outer wrapping butt joint pipe between the closure segment and the non-closure segment is completed. According to the method and the inner flange, the requirement for the dimensional accuracy of the closure segment is relatively low, the operation is easy, adjustment can be completed only through the long bolts, excessive equipment is not needed, the construction cost can be reduced, the closure time is greatly shortened, and the closure quality is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for connecting and closing inner flanges of a steel tube concrete arch bridge and the inner flanges. Background technique [0002] The concrete-filled steel tube arch bridge is a common modern bridge, which has the advantages of large span space, large bearing capacity, and good viewing, and is widely used in high-speed railways and various transportation fields. [0003] During the construction of concrete-filled steel tube arch bridges, the traditional closing method of steel tube arch ribs adopts: the “sharp stone” segment with a suitable size for the closing time is reserved on the vault according to the design and temperature conditions. The segments are fixed by temporary accessories such as horse boards, and both ends are welded at the same time to form a closed state. However, this method requires very high precision in the size of the closed section...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B1/02E01D4/00E01D21/00E01D101/26
CPCF16B1/02E01D4/00E01D21/00F16B2200/506E01D2101/262
Inventor 段新鸽王凤喜李永刚楼敏王蕾杨强施红斌钟佳强
Owner THE 3RD ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GRP CO LTD