CN206956565U - A kind of steel box girder bridge hogging moment area pre-stress system - Google Patents
A kind of steel box girder bridge hogging moment area pre-stress system Download PDFInfo
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- CN206956565U CN206956565U CN201720867629.5U CN201720867629U CN206956565U CN 206956565 U CN206956565 U CN 206956565U CN 201720867629 U CN201720867629 U CN 201720867629U CN 206956565 U CN206956565 U CN 206956565U
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- steel
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Abstract
The utility model discloses a kind of steel box girder bridge hogging moment area pre-stress system, including：Steel box-girder, steel strand wires, jack, ballast water bag, middle bearing and side, the sagging moment area of mid-span are mated formation concrete.Steel box-girder side, the sagging moment area casting concrete of mid-span, pre-buried bellows in concrete；Side, mid-span sagging moment area pave-load layer on set ballast water bag；Steel strand wires, steel strand wires both ends installation jack are connected in bellows；After middle bearing area concrete reaches design strength, steel strand wires and ballast water bag are removed；Grout injection in bellows.Pre-stress system concrete slab near middle bearing in steel box girder bridge hogging moment area described in the utility model establishes precompression, effectively prevents concrete cracking, and system stress is clear and definite, structure is safe and reliable, and whole process is simple to operate, and construction is quick.
Description
Technical field
The utility model belongs to technical field of bridge engineering, especially, discloses a kind of steel box girder bridge hogging moment area and in advance should
Force system.
Background technology
Caused tension easily causes bridge floor to ftracture in the concrete slab of steel box girder bridge hogging moment area, influences structure
Durability and performance, while reduce axial direction and the bending rigidity of steel case compound section.At present, for steel box girder bridge floorings
The most frequently used method that ftractures is to set regular reinforcement to limit concrete crack width or be answered by stretch-draw prestressing force to reduce to draw
Power is horizontal.The important channel of control bridge board cracking is to use rational construction method, the selection of sequence of construction and construction method
Principle is to control the tension of steel box-girder composite beam bridge concrete slab.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of steel box girder bridge hogging moment area pre-stress system, can fit
For increasing the safety stock of composite beam of steel box bridge concrete slab.
A kind of steel box girder bridge hogging moment area pre-stress system, including：Steel box-girder (1), end bay sagging moment area concrete (2),
Mid-span sagging moment area concrete (3), bellows (4), stretching notch (5), steel strand wires (6), jack (7), ballast water bag (8),
Anchor head (9), middle bearing concrete (10), cement mortar (11), into bridge pave-load layer (12)；Wherein：
The sagging moment area of the steel box-girder (1) is provided with end bay sagging moment area concrete (2) and mid-span sagging moment area coagulation
Native (3)；The end bay sagging moment area concrete (2) and mid-span sagging moment area concrete (3), which are reserved, is provided with stretching notch (5) simultaneously
And inside is embedded with bellows (4)；The end bay sagging moment area concrete (2) and mid-span sagging moment area concrete (3) are mated formation
Ballast water bag (8) is provided with layer；Steel strand wires (6) have been connected in the bellows (4)；The steel strand wires (6) are provided at both ends with
Jack (7)；Anchor head (9), for after the completion of the steel strand wires (6) tensioning, anchoring the both ends of steel strand wires (6)；The ripple
Manage (4) and stretching notch (5) interior grout injection (11)；It is described to include end bay sagging moment area concrete into bridge pave-load layer (12)
(2), mid-span sagging moment area concrete (3) and middle bearing concrete (10).
Preferably, anchor head (9), steel strand wires (6) and ballast water bag (8) are dismountable.
Compared with prior art, steel box girder bridge hogging moment area described in the utility model pre-stress system is near middle bearing
Concrete slab establishes precompression, effectively prevents concrete cracking, and system stress is clear and definite, structure is safe and reliable, and uses
Journey is simple to operate, and construction is quick.
Brief description of the drawings
Fig. 1 is steel box beam erection schematic diagram.
Fig. 2 is sagging moment area concreting schematic diagram.
Fig. 3 is pre-stress system scheme of installation.
Fig. 4 is steel strand anchoring schematic diagram.
Fig. 5 is middle bearing concreting schematic diagram.
Fig. 6 is duct grout pouring schematic diagram.
Fig. 7 is steel box girder bridge into bridge pave-load layer schematic diagram.
Description of reference numerals：
1- steel box-girders, 2- end bay sagging moments area concrete, 3- mid-span sagging moments area concrete, 4- bellowss, 5- tension slot grooves
Bearing concrete, 11- cement mortars, 12- mat formation into bridge in mouth, 6- steel strand wires, 7- jack, 8- ballasts water bag, 9- anchor heads, 10-
Layer.
Embodiment
To make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings to this reality
It is described in detail with a kind of steel box girder bridge hogging moment area pre-stress system of new offer.
Steel box girder bridge hogging moment area provided by the utility model pre-stress system, including：Steel box-girder 1, end bay sagging moment area
Concrete 2, mid-span sagging moment area concrete 3, bellows 4, stretching notch 5, steel strand wires 6, jack 7, ballast water bag 8, anchor head
9th, middle bearing concrete 10, cement mortar 11, into bridge pave-load layer 12.
The sagging moment area of steel box-girder 1 pours side 2 and the concrete of mid-span 3.Sagging moment area side 2 and reserved of the concrete of mid-span 3
Kerve mouth 5 and interior pre-buried bellows 4.Ballast water bag 8 is set on the pave-load layer of sagging moment area side 2 and mid-span 3.In bellows 4
Connect steel strand wires 6, the both ends of steel strand wires 6 installation jack 7.
After the completion of the tensioning of steel strand wires 6, the both ends of steel strand wires 6 are anchored using anchor head 9.In middle bearing area, concrete 10 reaches design
After intensity, loosen anchor head 9, remove steel strand wires 6, anchor head 9 and ballast water bag 8.The cement injection in bellows 4 and stretching notch 5
Slurry 11.Divided into bridge pave-load layer 12 by end bay sagging moment area concrete 2, mid-span sagging moment area concrete 3 and middle bearing concrete 10
Stage, which pours, to be formed.
When in use, can carry out in accordance with the following steps：
(1) steel box beam erection is in place, sees Fig. 1.
(2) concrete of mating formation is poured in steel box-girder side, mid-span sagging moment area, the pre-buried bellows in longitudinal direction in concrete of mating formation,
Mating formation, stretching notch is reserved in concrete both sides, sees Fig. 2.
(3) side, mid-span sagging moment area mat formation after concrete reaches design strength, and ballast water bag is set on pave-load layer,
Steel strand wires are connected in bellows；Jack is installed at steel strand wires both ends, sees Fig. 3.
(4) after jack tension to design load, steel strand wires both ends are anchored using anchor head, see Fig. 4.
(5) pour middle bearing area to mat formation concrete, see Fig. 5.
(6) bearing area mats formation after concrete reaches design strength in, loosens anchor head, and remove steel strand wires and ballast water bag.
(7) in bellows duct and the intraoral grouting methol of preformed groove, and by strong late maintaining, Fig. 6 is seen.
(8) after grouting methol reaches design strength, the construction of steel box girder bridge pave-load layer is completed, and sees Fig. 7.
Pre-stress system concrete slab near middle bearing in steel box girder bridge hogging moment area provided by the utility model is built
Vertical precompression, effectively prevents concrete cracking, and system stress is clear and definite, structure is safe and reliable, and whole process is simple to operate, construction
Quickly.
It is understood that embodiment of above is merely to illustrate that principle of the present utility model and used exemplary
Embodiment, but the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case of the spirit and essence of utility model, various changes and modifications can be made therein, and these variations and modifications are also considered as this reality
With new protection domain.
Claims (2)
1. a kind of steel box girder bridge hogging moment area pre-stress system, including：Steel box-girder (1), end bay sagging moment area concrete (2), in
Across sagging moment area's concrete (3), bellows (4), stretching notch (5), steel strand wires (6), jack (7), ballast water bag (8), anchor
Head (9), middle bearing concrete (10), cement mortar (11), into bridge pave-load layer (12), it is characterised in that：
The sagging moment area of the steel box-girder (1) is provided with end bay sagging moment area concrete (2) and mid-span sagging moment area concrete
(3)；The end bay sagging moment area concrete (2) and mid-span sagging moment area concrete (3) be reserved be provided with stretching notch (5) and
Inside is embedded with bellows (4)；The end bay sagging moment area concrete (2) and the pave-load layer of mid-span sagging moment area concrete (3)
On be provided with ballast water bag (8)；Steel strand wires (6) have been connected in the bellows (4)；The steel strand wires (6) are provided at both ends with thousand
Jin top (7)；Anchor head (9), for after the completion of the steel strand wires (6) tensioning, anchoring the both ends of steel strand wires (6)；The bellows
And stretching notch (5) interior grout injection (11) (4)；It is described into bridge pave-load layer (12) include end bay sagging moment area concrete (2),
Mid-span sagging moment area concrete (3) and middle bearing concrete (10).
2. steel box girder bridge hogging moment area as claimed in claim 1 pre-stress system, it is characterised in that：The anchor head (9), steel twist
Line (6) and ballast water bag (8) are dismountable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867629.5U CN206956565U (en) | 2017-07-17 | 2017-07-17 | A kind of steel box girder bridge hogging moment area pre-stress system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867629.5U CN206956565U (en) | 2017-07-17 | 2017-07-17 | A kind of steel box girder bridge hogging moment area pre-stress system |
Publications (1)
| Publication Number | Publication Date |
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| CN206956565U true CN206956565U (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720867629.5U Expired - Fee Related CN206956565U (en) | 2017-07-17 | 2017-07-17 | A kind of steel box girder bridge hogging moment area pre-stress system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459154A (en) * | 2018-05-16 | 2018-08-28 | 山东省公路桥梁建设有限公司 | A kind of wet seam testing stand of concrete with constraint function and test method |
| CN108858740A (en) * | 2018-06-28 | 2018-11-23 | 广西长长路桥建设有限公司 | The construction method of prefabricated negative moment of girder tension slot groove |
| CN108978434A (en) * | 2018-10-16 | 2018-12-11 | 河南省交通规划设计研究院股份有限公司 | A kind of Novel steel-is mixed to be combined Continuous Box Girder Bridge and its industrializes construction method without bracket |
| CN109629435A (en) * | 2019-01-09 | 2019-04-16 | 吴云香 | A kind of construction method for cutting down two parasitic moment of Long span prestressed continuous bridge |
| CN114808680A (en) * | 2022-04-22 | 2022-07-29 | 江苏中路工程技术研究院有限公司 | Open rib steel bridge deck pavement structure and preparation method thereof |
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2017
- 2017-07-17 CN CN201720867629.5U patent/CN206956565U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459154A (en) * | 2018-05-16 | 2018-08-28 | 山东省公路桥梁建设有限公司 | A kind of wet seam testing stand of concrete with constraint function and test method |
| CN108459154B (en) * | 2018-05-16 | 2023-11-03 | 山东省公路桥梁建设有限公司 | Concrete wet joint test bed with constraint function and test method |
| CN108858740A (en) * | 2018-06-28 | 2018-11-23 | 广西长长路桥建设有限公司 | The construction method of prefabricated negative moment of girder tension slot groove |
| CN108978434A (en) * | 2018-10-16 | 2018-12-11 | 河南省交通规划设计研究院股份有限公司 | A kind of Novel steel-is mixed to be combined Continuous Box Girder Bridge and its industrializes construction method without bracket |
| CN108978434B (en) * | 2018-10-16 | 2024-02-20 | 河南省交通规划设计研究院股份有限公司 | Bracket-free industrialized construction method of steel-concrete combined continuous box girder bridge |
| CN109629435A (en) * | 2019-01-09 | 2019-04-16 | 吴云香 | A kind of construction method for cutting down two parasitic moment of Long span prestressed continuous bridge |
| CN114808680A (en) * | 2022-04-22 | 2022-07-29 | 江苏中路工程技术研究院有限公司 | Open rib steel bridge deck pavement structure and preparation method thereof |
| CN114808680B (en) * | 2022-04-22 | 2023-10-27 | 江苏中路工程技术研究院有限公司 | Open rib steel bridge deck pavement structure and preparation method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 Termination date: 20190717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |