CN109208457A - A kind of construction improving external prestressing prefabricated subsection beam bridge globality - Google Patents
A kind of construction improving external prestressing prefabricated subsection beam bridge globality Download PDFInfo
- Publication number
- CN109208457A CN109208457A CN201710554402.XA CN201710554402A CN109208457A CN 109208457 A CN109208457 A CN 109208457A CN 201710554402 A CN201710554402 A CN 201710554402A CN 109208457 A CN109208457 A CN 109208457A
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- CN
- China
- Prior art keywords
- external prestressing
- steel plate
- construction
- prefabricated subsection
- screw rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of constructions for improving external prestressing prefabricated subsection beam bridge globality, belong to science of bridge building field.The present invention includes precast segmental beam, screw rod, nut and high-strength steel sheet.After beam sections are spliced with external prestressing steels, in adjacent segment beam bottom portion outer patch high strength steel plate, high-strength bolt is passed through into the duct that beam sections are reserved near seam and the hole that outer sticking steel plate is reserved simultaneously and tightens nut, the Interal fixation of precast beam bottom is got up, finally in screw rod circumfusion epoxy resin mortar.The high-strength bolt can make outer patch steel plate and beam sections form a stronger entirety.The connectivity between adjacent segment beam can be improved in present invention construction, has delayed the opening of seam, while improving the rigidity and bearing capacity of external prestressing prefabricated subsection beam bridge.Compared with prior art, which can be greatly improved the globality of external prestressing precast segmental beam and easy for construction.
Description
Technical field
The present invention relates to a kind of constructions for improving external prestressing prefabricated subsection beam bridge globality, belong to science of bridge building neck
Domain.
Background technique
Since 2016, for China's labor cost go up, traditional architecture industry upgrade the problems such as, the Ministry of Construction, friendship
Repeatedly assembly building is promoted in dispatch in logical portion, and the ground such as Beijing, Shanghai, Jinan also launch respectively provincial standard and support assembly building skill
The popularization and application of art.
The precast assembly construction method of bridge is that beam body is divided into several segments, and transport to bridge location carries out after precast plant is prefabricated
Spelling, this is a kind of construction method of Medium Span beam bridge.Due to prefabricated in advance in factory, small, construction is interfered construction site
Speed ratio is very fast, and beam body quality is easy to get control, and the bridge and urban elevated bridge more than 2 kilometers long to bridge is especially suitable.
Although precast segmental beam have the advantages that it is so more, due to externally cable prefabricated subsection concrete-bridge seam crossing be easy open,
Cause the rigidity of prefabricated subsection beam bridge lower, bearing capacity is low compared with unjointed beam, limits its further popularization and application.Therefore how to mention
The rigidity and globality of high prefabricated subsection beam bridge are always the emphasis of people's research.The breakthrough of the technical bottleneck is beneficial to the pole
The popularization and application of competitive bridge type obtain Social benefit and economic benefit.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides a kind of raising external prestressing prefabricated subsection beam bridge is whole
The construction of body.The present invention can effectively improve the globality and bearing capacity of external prestressing prefabricated subsection beam bridge.
The technical scheme is that the construction of raising external prestressing prefabricated subsection beam bridge globality of the invention, packet
Precast segmental beam is included, after being spliced beam sections 1 with external prestressing steels 5, in 1 bottom outer patch high strength steel plate 4 of adjacent segment beam, together
When by high-strength bolt 2 pass through beam sections 1 near seam reserve duct and steel plate 4, screw on nut 3 for steel in 2 bottom of screw rod
Plate 4 and 1 body of beam sections form an entirety.
The cross sectional shape of the screw rod 2 is T font, using high-strength screw-thread steel, and in 2 circumfusion epoxy resin of screw rod
Mortar 6.Epoxy resin mortar 6 can make screw rod 2 and cell walls be completely embedded, and structural integrity is good, improve the carrying of structure
Power, while protecting screw rod from corrosion.
The steel plate 4 applies in 4 outer surface of steel plate by being attached to 1 bottom of precast segmental beam outside epoxy resin and spreads ring
Oxygen resin.In 4 outer surface of steel plate, epoxy resin is spread in painting can protect steel plate 3 from corrosion.
The beneficial effects of the present invention are: segment production is still using conventional template, change work is minimum, does not increase pre-
Difficulty processed；Present invention construction constructing operation is simple and convenient simultaneously, participates in without big machinery；The present invention can effectively inhibit segment
The seam of beam is opened, and effectively improves the overall performance and rigidity of externally prestressed beams, while greatly improving prefabricated subsection beam bridge
Bearing capacity.
Detailed description of the invention
Fig. 1 illustrates for the vertical section of the construction of the invention for improving external prestressing prefabricated subsection beam bridge globality screw rod
Figure；
Fig. 2 is the elevational schematic view for the construction that the present invention improves external prestressing prefabricated subsection beam bridge globality.
In attached drawing: 1- precast segmental beam, 2- screw rod, 3- nut, 4- steel plate, 5- external prestressing steels, 6- epoxy resin sand
Slurry.
Specific embodiment
Further detailed description is done to the present invention below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment:
As shown in Figure 1, the present invention is further described for 1 explanation and specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, improving the construction of external prestressing prefabricated subsection beam bridge globality, including prefabricated subsection beams of concrete
1, wherein precast segmental beam 1 is stitched together by tensioning external prestressing steels 5, sticking steel plate 4 outside 1 bottom of precast beam,
The hole that the screw rod 2 is inserted into the reserved duct of precast segmental beam and reserves across steel plate 4, and spiral shell is tightened in 2 bottom of screw rod
It is female.
In the present embodiment, epoxy resin is smeared in 4 upper and lower surface of steel plate, and steel plate 4 is attached to by temporary support
Adjacent segment beam bottom portion.Epoxy resin is smeared in lower surface on the steel plate, the connectivity between steel plate and beam sections can be improved, together
When play protection steel plate from corrosion.
In the present embodiment, in order to which screw rod 2 carries out anti-corrosion, in the gap pressure injection epoxy resin mortar 6 of beam sections reserving hole channel.
Infusion epoxy resin mortar 6 can make screw rod 2 and cell walls be completely embedded, and structural integrity is good, improve the bearing capacity of structure.
Claims (6)
1. a kind of construction for improving external prestressing prefabricated subsection beam bridge globality, including precast segmental beam, it is characterised in that institute
When the beam sections production stated near seam reserving hole channel, sticking steel plate outside the beam sections bottom.
2. a kind of construction for improving external prestressing prefabricated subsection beam bridge globality according to claim 1, feature exist
Adjacent segment beam bottom portion is pasted by epoxy resin in the steel plate, and coats epoxy resin in steel plate outer surface.
3. a kind of construction for improving external prestressing prefabricated subsection beam bridge globality according to claim 1, feature exist
In: the steel plate is according to beam sections reserving hole channel position in corresponding position reserving hole.
4. a kind of construction for improving external prestressing prefabricated subsection beam bridge globality according to claim 2, feature exist
In: after the adjacent beam sections external prestressing steels splice, screw rod is inserted at reserving hole channel and screws on nut fixation steel plate.
The shape of screw rod is T font screw rod.
5. a kind of construction for improving external prestressing prefabricated subsection beam bridge globality according to claim 2, feature exist
In: by the gap of reserving hole channel in screw rod circumfusion epoxy resin mortar.
6. a kind of construction for improving external prestressing prefabricated subsection beam bridge globality according to claim 4, feature exist
In: the screw rod uses high-strength screw-thread steel, and nut uses high-strength steel, and steel plate uses high-strength steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710554402.XA CN109208457A (en) | 2017-06-30 | 2017-06-30 | A kind of construction improving external prestressing prefabricated subsection beam bridge globality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710554402.XA CN109208457A (en) | 2017-06-30 | 2017-06-30 | A kind of construction improving external prestressing prefabricated subsection beam bridge globality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109208457A true CN109208457A (en) | 2019-01-15 |
Family
ID=64991354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710554402.XA Pending CN109208457A (en) | 2017-06-30 | 2017-06-30 | A kind of construction improving external prestressing prefabricated subsection beam bridge globality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109208457A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424524A (en) * | 2019-09-05 | 2020-07-17 | 湖南工业大学 | Modular ultrahigh-performance concrete prefabricated assembled beam suitable for different spans |
| CN112900278A (en) * | 2021-01-26 | 2021-06-04 | 安徽省交通规划设计研究总院股份有限公司 | Segment concrete member bearing tensile or main tensile stress and connection mode thereof |
| CN113779687A (en) * | 2021-10-27 | 2021-12-10 | 安徽省交通规划设计研究总院股份有限公司 | Method for calculating bending resistance bearing capacity of bridge assembled by overall external prestressed sections |
-
2017
- 2017-06-30 CN CN201710554402.XA patent/CN109208457A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424524A (en) * | 2019-09-05 | 2020-07-17 | 湖南工业大学 | Modular ultrahigh-performance concrete prefabricated assembled beam suitable for different spans |
| CN112900278A (en) * | 2021-01-26 | 2021-06-04 | 安徽省交通规划设计研究总院股份有限公司 | Segment concrete member bearing tensile or main tensile stress and connection mode thereof |
| CN113779687A (en) * | 2021-10-27 | 2021-12-10 | 安徽省交通规划设计研究总院股份有限公司 | Method for calculating bending resistance bearing capacity of bridge assembled by overall external prestressed sections |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Yuhong Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Yuhong Document name: Deemed as a notice of withdrawal |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190115 |