CN106948279A - A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means - Google Patents
A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means Download PDFInfo
- Publication number
- CN106948279A CN106948279A CN201710249802.XA CN201710249802A CN106948279A CN 106948279 A CN106948279 A CN 106948279A CN 201710249802 A CN201710249802 A CN 201710249802A CN 106948279 A CN106948279 A CN 106948279A
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- Prior art keywords
- top board
- bale handle
- base plate
- prefabricated case
- studs
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
This patent discloses a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, including：Before prefabricated case beam bale handle, apply external prestressing between the top board (6) and base plate (7) of box beam, the top board (6) and web (8) junction concrete of box beam is set to be in pressured state before bale handle, it is to avoid crackle occurs in concrete in tension at this during bale handle.Precompression is provided to box beam top board, web junction so that the common stress of top board, base plate, the problem of box beam top board, web junction concrete in tension ftracture is solved from the angle of structure stress before bale handle.
Description
Technical field
This patent is related to building structure and technical field of construction, relates generally to high-speed railway two-wire precast prestressed concrete
Simple supported box beam, more specifically a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means.
Background technology
During high speed railway construction, to reduce floor space, adaptation to the ground and geological conditions as far as possible, through frequently with bridge
Beam, the ratio of bridge is general higher, in bridge structure based on precast prestressed concrete simple supported box beam bridge-type.Prefabricated freely-supported case
Beam is in place from installation is fabricated onto, and need to repeatedly carry out bale handle operation.At present, the prefabricated simple supported box beam of two-wire uses single box single chamber knot substantially
Structure, sets suspension centre to carry out bale handle operation, top board concrete cracking easily occurs with web joint during bale handle, influences in box beam top board
The outward appearance and durability of structure.
Regarding to the issue above, imitated more than prior art using the measures such as concrete cover control, stiffener configuration are strengthened
It is really not satisfactory, the situation of concrete cracking still generally existing during bale handle.
The content of the invention
The purpose of this patent is to provide a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, it is to avoid concrete occur
Bale handle crackle, to meet the requirement of High Speed Rail Projects acceptance criteria.
This patent is achieved through the following technical solutions：
A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, including：
Before prefabricated case beam bale handle, external prestressing is applied between the top board 6 and base plate 7 of box beam, makes the top board 6 and abdomen of box beam
The junction concrete of plate 8 is in pressured state before bale handle, it is to avoid crackle occurs in concrete in tension at this during bale handle.
The method of described application external prestressing includes：
Multiple strainers are set between top board 6 and base plate 7, and top board 6 is fixed in strainer upper end, and bottom is fixed in lower end
Plate 7, external prestressing is applied between top board 6 and base plate 7.
The perforate on nut and top board 6 and base plate 7 that described strainer coordinates including studs 1, two ends；
Studs 1 is through the perforate on top board 6 and base plate 7, in the underrun nut of the top surface and base plate 7 of top board 6
It is fixed；
Applying external prestressing method includes：According to the Space Calculation Analysis of box-beam structure, it is determined that avoiding concrete cracking
Required pre-add force value, the parameter of studs 1 and nut is chosen according to pre-add force value；
Studs 1 is penetrated from the perforate of box beam top board 6, is passed from the perforate of base plate 7, and is fixed on nut base plate 7
Bottom surface；
Box beam top board 6 top surface using jack pair studs 1 carry out tensioning, after tensioning in place, tighten double end spiral shell
The nut of the upper end of post 1, removes jack, applies precompression process and completes.
Pvc pipe pore-forming is taken out after pre-buried pvc pipe is poured in perforate before the box girder webs on top board 6 and base plate 7, and
Set active module, after the completion of construction in preformed hole placing expansive concrete.
After described bale handle installation terminates, utilize jack to unclamp studs 1, remove strainer.
Described strainer is located at bale handle lifting hole(eyelet) 5 and is symmetrical arranged by box-beam structure centerline side, and the position set
Put and avoid box beam longitudinal prestressing steel beam 2, beam falling prevention stopping block embedded sleeve barrel 3 and bearing pre-embedded steel slab 4.
A kind of high-speed railway two-wire precast box that this patent is provided it can be seen from the technical scheme that above-mentioned this patent is provided
Beam bale handle reinforcement means, provides precompression so that the common stress of top board, base plate before bale handle to box beam top board, web junction,
The problem of box beam top board, web junction concrete in tension ftracture is solved from the angle of structure stress.
Brief description of the drawings
The facade structures schematic diagram for the bale handle reinforcement measure that Fig. 1 provides for this patent；
The planar structure schematic diagram for the bale handle reinforcement measure that Fig. 2 provides for this patent.
In figure：
1st, studs, 2, longitudinal prestressing steel beam, 3, beam falling prevention stopping block built-in fitting, 4, bearing pre-embedded steel slab, 5, bale handle
Lifting hole(eyelet), 6, top board, 7, base plate, 8, web, 9, hang pre-embedded steel slab.
Embodiment
This patent embodiment will be described in further detail below.
As shown in figs. 1 and 2, a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, according to prefabricated case beam structure determination
Arrangement, the arrangement of longitudinal prestressing steel beam 2, the arrangement of beam falling prevention stopping block embedded sleeve barrel 3 and the bearing pre-buried steel of bale handle lifting hole(eyelet) 5
The arrangement of plate 4.Lifted when using by installing drop hanger additional at bale handle lifting hole(eyelet) 5, will also at the beam lifting hole(eyelet) 5 below set up hang it is pre-
Steel plate 9 is buried, to increase intensity, specific method includes：
Before prefabricated case beam bale handle, external prestressing is applied between the top board 6 and base plate 7 of box beam, makes the top board 6 and abdomen of box beam
The junction concrete of plate 8 is in pressured state before bale handle, it is to avoid crackle occurs in concrete in tension at this during bale handle.
Here, the method for described application external prestressing includes：
Multiple strainers are set between top board 6 and base plate 7, and multiple strainers are located at bale handle lifting hole(eyelet) 5 by box beam
Structure centre line side is symmetrical arranged, and can set quantity as needed.And box beam longitudinal prestressing steel is avoided in the position set
Beam 2, beam falling prevention stopping block embedded sleeve barrel 3 and bearing pre-embedded steel slab 4.Top board 6 is fixed in strainer upper end, and base plate is fixed in lower end
7, apply external prestressing between top board 6 and base plate 7.Coordinate specifically, described strainer includes studs 1, two ends
Nut and top board 6 and base plate 7 on perforate；In actual use, before described box girder webs on top board 6 and base plate 7
Perforate in pre-buried pvc pipe pour after take out pvc pipe pore-forming, and set bed die active module to provide studs 1 in base plate 7
The anchoring space of downside.After the completion of construction in preformed hole placing expansive concrete.Studs 1 passes through top board 6 and bottom
Perforate on plate 7, is fixed in the top surface of top board 6 with the underrun nut of base plate 7.
Applying external prestressing method includes：
(1), according to the Space Calculation Analysis of box-beam structure, it is determined that the pre-add force value needed for avoiding concrete cracking, according to
Pre-add force value chooses the parameter of studs 1 and nut；
Space Calculation Analysis is conventional structure design means, and those skilled in the art can skillfully grasp, mainly
Determine to use when pre-add force value works for follow-up jack, determine the parameter of studs 1 and nut, such as material, diameter is waited,
Influence the parameter of intensity.
For convenience of technical staff's work, take a single example, certain prefabricated case beam determines single double end spiral shell according to Space Calculation Analysis
The pre-applied force that post 1 need to apply is 40t.60t and the jack of the above are chosen according to 1.5 times of safety coefficients during construction, according to 1.5 times
The studs 1 and matching nut that safety coefficient chooses bearing capacity 60t or higher can be (as from diameter 32mm, tension standards
Intensity 830MPa, single bearing capacity are 66.7t finish rolling deformed bar and matching nut).
(2) studs 1, is penetrated from the perforate of box beam top board 6, is passed from the perforate of base plate 7, and bottom is fixed on nut
The bottom surface of plate 7；
(3), box beam top board 6 top surface using jack pair studs 1 carry out tensioning, after tensioning in place, tensioning is arrived
Position, which refers to, reaches pre-add force value, tightens the nut of the upper end of studs 1, removes jack, applies precompression process and completes.
(4) after, the installation of described bale handle terminates, utilize jack to unclamp studs 1, remove strainer.And pre-
Box out interior placing expansive concrete.
The advantage of this patent is：
1st, this patent solves prefabricated case beam bale handle process by the way of external prestressing is applied from structure stress angle
The problem of middle concrete cracking, effect significantly, is influenceed small by external condition.
2nd, the studs 1 involved by this patent reinforcement measure is interim construction, dismountable recycling after the completion of construction,
It is cost-effective；Studs 1 is recyclable to be used for other permanent structures.
3rd, the installation position and pre-add force value for the studs 1 that this patent reinforcement measure is related to calculate determination as required,
It can implement in the prefabricated case beam of various use top board bale handles, have a wide range of application.
The above, only this patent preferably embodiment, but the protection domain of this patent is not limited thereto,
Any one skilled in the art is in the technical scope that this patent is disclosed, the change or replacement that can be readily occurred in,
It should all cover within the protection domain of this patent.Therefore, the protection domain of this patent should be with the protection model of claims
Enclose and be defined.
Claims (6)
1. a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, it is characterised in that including：
Before prefabricated case beam bale handle, external prestressing is applied between the top board (6) and base plate (7) of box beam, make box beam top board (6) and
Web (8) junction concrete is in pressured state before bale handle, it is to avoid crackle occurs in concrete in tension at this during bale handle.
2. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 1, it is characterised in that described applies
Plus the method for external prestressing includes：
Multiple strainers are set between top board (6) and base plate (7), and top board (6) is fixed in strainer upper end, and lower end is fixed on
Base plate (7), external prestressing is applied between top board (6) and base plate (7).
3. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 2, it is characterised in that described
The perforate on nut and top board (6) and base plate (7) that tight mechanism coordinates including studs (1), two ends；
Studs (1) leads to through the perforate on top board (6) and base plate (7) in the top surface of top board (6) with the bottom surface of base plate (7)
Nut is crossed to fix；
Applying external prestressing method includes：According to the Space Calculation Analysis of box-beam structure, it is determined that needed for avoiding concrete cracking
Pre-add force value, choose studs (1) and the parameter of nut according to pre-add force value；
Studs (1) is penetrated from the perforate of box beam top board (6), is passed from the perforate of base plate (7), and base plate is fixed on nut
(7) bottom surface；
Box beam top board (6) top surface using jack pair studs (1) carry out tensioning, after tensioning in place, tighten double end spiral shell
The nut of post (1) upper end, removes jack, applies precompression process and completes.
4. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 3, it is characterised in that the box beam
Pvc pipe pore-forming is taken out after pre-buried pvc pipe is poured in perforate before pouring on top board (6) and base plate (7), and movable mold is set
Block, after the completion of construction in preformed hole placing expansive concrete.
5. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 3, it is characterised in that described carries
After beam installation terminates, utilize jack to unclamp studs (1), remove strainer.
6. the high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 2,3,4 or 5, it is characterised in that
Described strainer is located at bale handle lifting hole(eyelet) (5) and is symmetrical arranged by box-beam structure centerline side, and the position set is avoided
Box beam longitudinal prestressing steel beam (2), beam falling prevention stopping block embedded sleeve barrel (3) and bearing pre-embedded steel slab (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249802.XA CN106948279B (en) | 2017-04-17 | 2017-04-17 | A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249802.XA CN106948279B (en) | 2017-04-17 | 2017-04-17 | A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means |
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| Publication Number | Publication Date |
|---|---|
| CN106948279A true CN106948279A (en) | 2017-07-14 |
| CN106948279B CN106948279B (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710249802.XA Active CN106948279B (en) | 2017-04-17 | 2017-04-17 | A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605212A (en) * | 2021-07-29 | 2021-11-05 | 广东省交通规划设计研究院集团股份有限公司 | Anti-cracking structure for single-box double-chamber prefabricated segment box girder in construction period and construction method thereof |
| CN114922125A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | PC beam type bridge, and reinforcing device and method for PC beam type bridge |
Citations (5)
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| CN202047377U (en) * | 2011-04-26 | 2011-11-23 | 中铁二院工程集团有限责任公司 | Reinforcing structure of concrete box girder |
| KR20110126781A (en) * | 2010-05-18 | 2011-11-24 | 동도산업 주식회사 | Inner formwork for pre-stressed concrete box girder of precast segmental method |
| CN202247707U (en) * | 2011-06-10 | 2012-05-30 | 广东工业大学 | Vertical external prestress and steel plate combined reinforcing box girder structure |
| JP2013142226A (en) * | 2012-01-10 | 2013-07-22 | Sumitomo Mitsui Construction Co Ltd | Construction method for box girder bridge |
| CN103485286A (en) * | 2013-10-08 | 2014-01-01 | 中铁二局股份有限公司 | Method for strengthening box girder prefabricated segment box chamber |
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2017
- 2017-04-17 CN CN201710249802.XA patent/CN106948279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110126781A (en) * | 2010-05-18 | 2011-11-24 | 동도산업 주식회사 | Inner formwork for pre-stressed concrete box girder of precast segmental method |
| CN202047377U (en) * | 2011-04-26 | 2011-11-23 | 中铁二院工程集团有限责任公司 | Reinforcing structure of concrete box girder |
| CN202247707U (en) * | 2011-06-10 | 2012-05-30 | 广东工业大学 | Vertical external prestress and steel plate combined reinforcing box girder structure |
| JP2013142226A (en) * | 2012-01-10 | 2013-07-22 | Sumitomo Mitsui Construction Co Ltd | Construction method for box girder bridge |
| CN103485286A (en) * | 2013-10-08 | 2014-01-01 | 中铁二局股份有限公司 | Method for strengthening box girder prefabricated segment box chamber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605212A (en) * | 2021-07-29 | 2021-11-05 | 广东省交通规划设计研究院集团股份有限公司 | Anti-cracking structure for single-box double-chamber prefabricated segment box girder in construction period and construction method thereof |
| CN114922125A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | PC beam type bridge, and reinforcing device and method for PC beam type bridge |
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| Publication number | Publication date |
|---|---|
| CN106948279B (en) | 2018-08-14 |
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