CN106948279B - 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
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- CN106948279B CN106948279B CN201710249802.XA CN201710249802A CN106948279B CN 106948279 B CN106948279 B CN 106948279B CN 201710249802 A CN201710249802 A CN 201710249802A CN 106948279 B CN106948279 B CN 106948279B
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- top plate
- bale handle
- bottom 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 plate (6) and bottom plate (7) of box beam, the top plate (6) and web (8) junction concrete for making box beam are in pressured state before bale handle, and the junction concrete in tension is cracked when avoiding bale handle.Precompression is provided to box beam top plate, web junction so that the common stress of top plate and bottom plate solves the problems, such as box beam top plate, web junction concrete in tension cracking 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 to the greatest extent, through frequently with bridge
The ratio of beam, bridge is generally 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.Currently, the prefabricated simple supported box beam of two-wire uses single box single chamber knot substantially
Structure, in box beam top plate setting suspension centre progress bale handle operation, bale handle, easily there is concrete cracking with web joint in top plate, influences
The appearance and durability of structure.
In view of the above-mentioned problems, the prior art, which mostly uses, reinforces the measures such as concrete cover control, stiffener configuration, effect
Fruit is not satisfactory, still generally existing the case where concrete cracking when bale handle.
Invention content
The purpose of this patent is to provide a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, avoids the occurrence of concrete
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, apply external prestressing between the top plate 6 and bottom plate 7 of box beam, makes the top plate 6 and abdomen of box beam
8 junction concrete of plate is in pressured state before bale handle, and the junction concrete in tension is cracked when avoiding bale handle.
The method of the application external prestressing includes：
Multiple strainers are set between top plate 6 and bottom plate 7, and top plate 6 is fixed in strainer upper end, and bottom is fixed in lower end
Plate 7 applies external prestressing between top plate 6 and bottom plate 7.
The strainer includes studs 1, the nut of both ends cooperation and the trepanning on top plate 6 and bottom plate 7；
Studs 1 passes through the trepanning on top plate 6 and bottom plate 7, the underrun nut in the top surface of top plate 6 and bottom plate 7
It is fixed；
Applying external prestressing method includes：According to the Space Calculation Analysis of box-beam structure, determination avoids concrete cracking
Required pre-add force value chooses the parameter of studs 1 and nut according to pre-add force value；
Studs 1 is penetrated from the trepanning of box beam top plate 6, is pierced by from the trepanning of bottom plate 7, nut is used in combination to be fixed on bottom plate 7
Bottom surface；
Tensioning is carried out using jack pair studs 1 in the top surface of box beam top plate 6, after tensioning in place, tightens double end spiral shell
The nut of 1 upper end of column removes jack, applies sequence of prestressing and completes.
Pvc pipe pore-forming is taken out after pre-buried pvc pipe pours in trepanning before the box girder webs on top plate 6 and bottom plate 7, and
Be arranged active module, after the completion of construction in preformed hole placing expansive concrete.
After the bale handle installation, studs 1 is unclamped using jack, removes strainer.
The strainer is located at bale handle lifting hole(eyelet) 5 and is symmetrical arranged by box-beam structure centerline side, and the position being arranged
It sets and avoids 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 provides it can be seen from the technical solution that above-mentioned this patent provides
Beam bale handle reinforcement means provides precompression before bale handle to box beam top plate, web junction so that the common stress of top plate and bottom plate,
Solve the problems, such as box beam top plate, web junction concrete in tension cracking from the angle of structure stress.
Description of the drawings
Fig. 1 is the schematic view of facade structure for the bale handle reinforcement measure that this patent provides；
Fig. 2 is the planar structure schematic diagram for the bale handle reinforcement measure that this patent provides.
In figure：
1, 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 plate, 7, bottom plate, 8, web, 9, hang pre-embedded steel slab.
Specific implementation mode
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
The arrangement of bale handle lifting hole(eyelet) 5, the arrangement of longitudinal prestressing steel beam 2, the arrangement of beam falling prevention stopping block embedded sleeve barrel 3 and bearing pre-buried steel
The arrangement of plate 4.Lifted when use by installing drop hanger additional at bale handle lifting hole(eyelet) 5, will also at the beam lifting hole(eyelet) 5 below add hang it is pre-
Steel plate 9 is buried, to increase intensity, specific method includes：
Before prefabricated case beam bale handle, apply external prestressing between the top plate 6 and bottom plate 7 of box beam, makes the top plate 6 and abdomen of box beam
8 junction concrete of plate is in pressured state before bale handle, and the junction concrete in tension is cracked when avoiding bale handle.
Here, the method for the application external prestressing includes：
Multiple strainers are set between top plate 6 and bottom plate 7, and multiple strainers are located at bale handle lifting hole(eyelet) 5 and lean on box beam
Structure centre line side is symmetrical arranged, and can be set as needed quantity.And box beam longitudinal prestressing steel is avoided in the position of setting
Beam 2, beam falling prevention stopping block embedded sleeve barrel 3 and bearing pre-embedded steel slab 4.Top plate 6 is fixed in strainer upper end, and bottom plate is fixed in lower end
7, apply external prestressing between top plate 6 and bottom plate 7.Specifically, the strainer includes studs 1, both ends cooperation
Nut and top plate 6 and bottom plate 7 on trepanning；In actual use, before the box girder webs on top plate 6 and bottom plate 7
Trepanning in pre-buried pvc pipe pour after take out pvc pipe pore-forming, and bed die active module is set to provide studs 1 in bottom plate 7
The anchoring space of downside.After the completion of construction in preformed hole placing expansive concrete.Studs 1 passes through top plate 6 and bottom
Trepanning on plate 7 is fixed in the top surface of top plate 6 and the underrun nut of bottom plate 7.
Applying external prestressing method includes：
(1), according to the Space Calculation Analysis of box-beam structure, the pre-add force value avoided needed for concrete cracking is determined, 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
It determines and is used when pre-add force value works for follow-up jack, determine that the parameter of studs 1 and nut, such as material, diameter wait for,
Influence the parameter of intensity.
It works, takes a single example, certain prefabricated case beam determines single double end spiral shell according to Space Calculation Analysis for convenience of technical staff
The pre-applied force that column 1 need to apply is 40t.The jack for choosing 60t or more when construction according to 1.5 times of safety coefficients, according to 1.5 times
Safety coefficient chooses bearing capacity 60t or higher studs 1 and matching nut can be (as selected diameter 32mm, tension standard
Intensity 830MPa, the finish rolling deformed bar and matching nut that single bearing capacity is 66.7t).
(2), studs 1 is penetrated from the trepanning of box beam top plate 6, is pierced by from the trepanning of bottom plate 7, nut is used in combination to be fixed on bottom
The bottom surface of plate 7；
(3), tensioning is carried out using jack pair studs 1 in the top surface of box beam top plate 6, after tensioning in place, tensioning is arrived
Position, which refers to, reaches pre-add force value, tightens the nut of 1 upper end of studs, removes jack, applies sequence of prestressing and completes.
(4), after bale handle installation, studs 1 is unclamped using jack, removes strainer.And pre-
It boxes out interior placing expansive concrete.
The advantages of this patent is：
1, this patent solves prefabricated case beam bale handle process by the way of applying external prestressing from structure stress angle
The problem of middle concrete cracking, significant effect are influenced small by external condition.
2, the studs 1 involved by this patent reinforcement measure is to construct temporarily, dismountable recycling after the completion of construction,
It is cost-effective；Studs 1 is recyclable to be used for other permanent structures.
3, the installation position for the studs 1 that this patent reinforcement measure is related to and pre-add force value calculate determination as required,
Can it is various using the prefabricated case beam of top plate bale handle in implement, have a wide range of application.
The preferable specific implementation mode of the above, only this patent, 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 discloses, 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
Subject to enclosing.
Claims (6)
1. a kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means, which is characterized in that including：
Before prefabricated case beam bale handle, apply external prestressing between the top plate (6) and bottom plate (7) of box beam, make box beam top plate (6) and
Web (8) junction concrete is in pressured state before bale handle, and the junction concrete in tension is cracked when avoiding bale handle.
2. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 1, which is characterized in that described applies
The method of external prestressing is added to include：
Multiple strainers are set between top plate (6) and bottom plate (7), and top plate (6) is fixed in strainer upper end, and lower end is fixed on
Bottom plate (7) applies external prestressing between top plate (6) and bottom plate (7).
3. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 2, which is characterized in that
Tight mechanism includes studs (1), the nut of both ends cooperation and the trepanning on top plate (6) and bottom plate (7)；
Studs (1) passes through the trepanning on top plate (6) and bottom plate (7), logical in the top surface of top plate (6) and the bottom surface of bottom plate (7)
Nut is crossed to fix；
Applying external prestressing method includes：According to the Space Calculation Analysis of box-beam structure, determination avoids needed for concrete cracking
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 trepanning of box beam top plate (6), is pierced by from the trepanning of bottom plate (7), nut is used in combination to be fixed on bottom plate
(7) bottom surface；
Tensioning is carried out using jack pair studs (1) in the top surface of box beam top plate (6), after tensioning in place, tightens double end spiral shell
The nut of column (1) upper end removes jack, applies sequence of prestressing and completes.
4. high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 3, which is characterized in that the box beam
Pvc pipe pore-forming is taken out after pre-buried pvc pipe pours in trepanning before pouring on top plate (6) and bottom 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, which is characterized in that described carries
After beam is installed, studs (1) is unclamped using jack, removes strainer.
6. the high-speed railway two-wire prefabricated case beam bale handle reinforcement means according to claim 2,3,4 or 5, which is characterized in that
The strainer is located at bale handle lifting hole(eyelet) (5) and is symmetrical arranged by box-beam structure centerline side, and the position being arranged 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 |
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| CN106948279A CN106948279A (en) | 2017-07-14 |
| CN106948279B true CN106948279B (en) | 2018-08-14 |
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| 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
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 |
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| CN106948279A (en) | 2017-07-14 |
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