CN107815979A - A kind of box beam beam bottom prestressing force enhancing bracing means and its construction method - Google Patents
A kind of box beam beam bottom prestressing force enhancing bracing means and its construction method Download PDFInfo
- Publication number
- CN107815979A CN107815979A CN201711033723.1A CN201711033723A CN107815979A CN 107815979 A CN107815979 A CN 107815979A CN 201711033723 A CN201711033723 A CN 201711033723A CN 107815979 A CN107815979 A CN 107815979A
- Authority
- CN
- China
- Prior art keywords
- tensioning
- wire
- anchoring part
- compressor wire
- box beam
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- 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.)
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Classifications
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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
Abstract
The invention discloses a kind of box beam beam bottom prestressing force to strengthen bracing means, set including mirror image and be fixed on two tensioning anchoring parts at box beam beam bottom, for installing the installation crab-bolt of tensioning anchoring part, it is separately positioned on two anchor slabs of two tensioning anchoring parts away from plane of symmetry side, connect the compressor wire of two tensioning anchoring parts, the steel wire being arranged between two tensioning anchoring parts, and any one tensioning anchoring part is arranged on away from plane of symmetry side and the stretch-draw jack that is connected with compressor wire.For the present invention due to carrying out prestressed stretch-draw, small volume using high tensile steel wire, anchoring position requires relatively low；The prestressing force dispersed distribution of compressor wire is in embedded high-strength and high-ductility epoxy concrete, so as to alleviate the stress concentration of the anchored end of compressor wire, reaches the purpose for improving bridge prestress well, so as to ensure that the consolidation effect of bridge.Present invention also offers the construction method of the bracing means.
Description
Technical field
The present invention relates to engineer applied Bridge technical field of structural reinforcement, and in particular to be a kind of box beam beam bottom in advance should
Power strengthens bracing means and its construction method.
Background technology
Bridge is the important component of Modern Traffic net, and many bridges are in overload operation state for a long time at present,
Many bridges cause the quantity of disease bridge, unsafe bridge more next because prestressed loss causes Lack of support and downwarp phenomenon occurs
It is more, it is difficult to meet the requirement of communications and transportation development.Adopt an effective measure in time and sick bridge, unsafe bridge are repaired and conserved and can be had
Effect ground strengthens the ability to work of existing bridge, extends the service life of bridge.Typically use for external prestress strengthening method
(tensioning cable wire etc.) but its anchored end volume are big, are not fixed easily, and the intensity requirement to anchoring position is high.Pine occurs for a long time
Relax.
To sum up, how to design a kind of a kind of box beam beam bottom prestressing force enhancing that can effectively solve prior art deficiency and reinforce dress
Put, become for those skilled in the art's urgent need to resolve the problem of one of.
The content of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of box beam beam bottom prestressing force to strengthen bracing means.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of box beam beam bottom prestressing force strengthens bracing means, including mirror image sets and is fixed on two tensioning at box beam beam bottom
Anchoring part, for installing the installation crab-bolt of tensioning anchoring part, it is separately positioned on two anchors of two tensioning anchoring parts away from plane of symmetry side
Plate, the compressor wire of two tensioning anchoring parts, the steel wire being arranged between two tensioning anchoring parts are connected, and be arranged on any
Individual tensioning anchoring part is away from plane of symmetry side and the stretch-draw jack that is connected with compressor wire；The tensioning anchoring part includes being used to pacify
Anchoring part bottom plate mounted in box beam beam bottom, and the anchoring part riser being fixedly connected vertical with anchoring part bottom plate one end, the installation crab-bolt
Be arranged on anchoring part bottom plate, be provided with the through hole that compressor wire passes through on the anchoring part riser, described two anchor slabs respectively with
Two anchoring part riser fittings are set, and the compressor wire is being worn through through hole and the mounting hole of anchor slab, the compressor wire
Cross and intermediate plate is provided with anchor slab, space pours in the compressor wire and steel wire is used for filled with high-strength and high-ductility epoxy concrete
The prestressing force of compressor wire is scattered in high-strength and high-ductility epoxy concrete, anchor slab and the tensioning thousand of the stretch-draw jack side
Jin is provided with limiting plate between top.
Preferably, the compressor wire is high tensile steel wire.
Preferably, the installation crab-bolt is chemical anchor bolts.
Specifically, the chemical anchor bolts are four and are uniformly arranged into square on anchoring part bottom plate.
Specifically, the compressor wire is four and is arranged side by side, the through hole on the anchoring part riser is four
And be arranged side by side, the anchor slab is the four hole anchor slabs matched with anchoring part riser, and the limiting plate is four matched with four hole anchor slabs
Hole limiting plate.
Based on foregoing teachings, present invention also offers the construction method of box beam beam bottom prestressing force enhancing bracing means, its
It is characterised by, comprises the following steps：
(1) first rule and slot at box beam beam bottom, bury two tensioning anchoring parts；
(2) two anchor slabs are fitted on the outside of two anchoring part risers, passed through through compressor wire and in compressor wire
Intermediate plate is set at two anchor slabs；
(3) limiting plate is set stretch-draw jack side need to be installed, then stretch-draw jack is connected with compressor wire；
(4) slowly oil-feed tensioning stretch-draw jack to design pulling force, cuts off unnecessary compressor wire；
(5) after compressor wire completes tensioning, steel wire is inserted between compressor wire and box beam beam bottom；
(6) epoxy concrete form erection is carried out；
(7) after the completion of epoxy concrete form is set up, high-strength and high-ductility epoxy concrete is inserted, to empty in compressor wire and steel wire
Between carry out cast closing；
(8) after the completion of the high-strength high viscous high tenacity epoxy concrete construction in box beam beam bottom, age reaches progress pine after design load.
Compared with prior art, the invention has the advantages that：
For the present invention due to carrying out prestressed stretch-draw, small volume using high tensile steel wire, anchoring position requires relatively low；Tensioning is complete
Steel wire is set between compressor wire afterwards, then with high-strength and high-ductility epoxy concrete, to empty in all compressor wires and steel wire
Between carry out cast closing, because high-strength and high-ductility epoxy concrete and concrete and steel have a superpower adhesive property, and its own
Good compression strength and tensile strength, it with the solidification of high-strength and high-ductility epoxy concrete, can divide the prestressing force of compressor wire
Dissipate and be distributed in embedded high-strength and high-ductility epoxy concrete, so as to alleviate the stress concentration of the anchored end of compressor wire, reach
The purpose of bridge prestress is improved well, so as to ensure that the consolidation effect of bridge.
Brief description of the drawings
Fig. 1 is the use state diagram of the present invention.
Fig. 2 is the tensioning anchoring part schematic diagram of the present invention.
Fig. 3 is the tensioning anchoring part sectional view of the present invention.
Fig. 4 is the anchored framework schematic diagram of the present invention.
Fig. 5 is the spacing plate structure schematic diagram of the present invention.
Wherein, it is entitled corresponding to reference：
1- tensioning anchoring parts, 2- installation crab-bolts, 3- anchor slabs, 4- compressor wires, 5- steel wires, 6- stretch-draw jacks, 7- anchors
Seat bottom plate, 8- anchoring part risers, 9- intermediate plates, 10- limiting plates.
Embodiment
The invention will be further described with embodiment for explanation below in conjunction with the accompanying drawings, and embodiments of the present invention are included but not
It is only limitted to following examples.
As shown in Fig. 1~5, a kind of box beam beam bottom prestressing force strengthens bracing means, including two tensioning anchoring parts 1, installation anchor
Bolt 2, two anchor slabs 3, compressor wire 4, steel wire 5, stretch-draw jacks 6；Wherein, tensioning anchoring part 1 includes being used to be arranged on case
The anchoring part bottom plate 7 at Liang Liang bottoms, the anchoring part riser 8 being fixedly connected vertical with the one end of anchoring part bottom plate 7.
Two tensioning anchoring parts 1 are oppositely arranged and are fixed on box beam beam bottom, and installation crab-bolt 2 is used to install tensioning anchoring part 1, two
Anchor slab 3 is separately positioned on two 1 outer sides of tensioning anchoring part, and compressor wire 4 connects two tensioning anchoring parts 1, steel
Silk screen 5 is arranged between two tensioning anchoring parts 1, and stretch-draw jack 6 is arranged on any one tensioning anchoring part 1 away from plane of symmetry side simultaneously
It is connected with compressor wire 4；Installation crab-bolt 2 is arranged on anchoring part bottom plate 7, and compressor wire 4 is provided with anchoring part riser 8 and is passed through
Through hole, two anchor slabs 3 are bonded setting with two anchoring part risers 8 respectively, installation of the compressor wire 4 through through hole and anchor slab 3
Hole, compressor wire 4 is through intermediate plate 9 is provided with anchor slab 3, and space is poured filled with height in compressor wire 4 and steel wire 5
Strong high tenacity epoxy concrete is used to the prestressing force of compressor wire 4 being scattered in high-strength and high-ductility epoxy concrete, stretch-draw jack 6 one
Limiting plate 10 is provided between the anchor slab 3 and stretch-draw jack 6 of side, compressor wire 4 is high tensile steel wire, and installation crab-bolt 2 is change
Crab-bolt is learned, chemical anchor bolts are four and to be uniformly arranged into square on anchoring part bottom plate 7, and compressor wire 4 is four and side by side
Set, the through hole on anchoring part riser 8 is four and is arranged side by side, and anchor slab 3 is the four hole anchor slabs matched with anchoring part riser 8, spacing
Plate 10 is the four hole limiting plates matched with four hole anchor slabs.
The construction method of the present embodiment box beam beam bottom prestressing force enhancing bracing means, comprises the following steps：
(1) first rule and slot at box beam beam bottom, bury two tensioning anchoring parts 1；
(2) two anchor slabs 3 are fitted in two outsides of anchoring part riser 8, through compressor wire 4 and in compressor wire 4
Intermediate plate 9 is set at through two anchor slabs 3；
(3) limiting plate 10 is set the side of stretch-draw jack 6 need to be installed, then by stretch-draw jack 6 and compressor wire 4
Connection；
(4) slowly oil-feed tensioning stretch-draw jack 6 to design pulling force, cuts off unnecessary compressor wire 4；
(5) after compressor wire 4 completes tensioning, steel wire 5 is inserted between compressor wire 4 and box beam beam bottom；
(6) epoxy concrete form erection is carried out；
(7) after the completion of epoxy concrete form is set up, high-strength and high-ductility epoxy concrete is inserted, in compressor wire 4 and steel wire 5
Space carries out cast closing；
(8) after the completion of the high-strength high viscous high tenacity epoxy concrete construction in box beam beam bottom, age reaches progress pine after design load.
Should misplace progress when Specific construction engineering central sill bottom tensioning anchoring part is embedded, avoid stress concentration as far as possible；Tensioning anchor
Stretching construction can be carried out after intensity is up to standard after seat is embedded, stretching force is determined by designing to calculate according to bridge actual conditions；Tensioning
When, answering slow oil-feed tensioning, people forbids station to fly to hurt sb.'s feelings to prevent anchor slab or top are de- at anchor slab both ends during tensioning to design pulling force；Excision
Sufficiently long active length should be reserved during unnecessary compressor wire；Must not should be noted that when closing mould to the compressor wire after tensioning
Cause to damage, need to check one by one, the construction of epoxy concrete can be carried out after need to being rectified and improved if any damage.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit the protection model of the present invention
Enclose, all body design thought in the present invention and that mentally makes have no the change of essential meaning or polishing, what it was solved
Technical problem is still consistent with the present invention, should be included within protection scope of the present invention.
Claims (6)
1. a kind of box beam beam bottom prestressing force strengthens bracing means, it is characterised in that is set including mirror image and is fixed on box beam beam bottom
Two tensioning anchoring parts (1), for installing the installation crab-bolt (2) of tensioning anchoring part, be separately positioned on two tensioning anchoring parts away from right
Two anchor slabs (3) of title face side, the compressor wire (4) of two tensioning anchoring parts is connected, is arranged between two tensioning anchoring parts
Steel wire (5), and be arranged on any one tensioning anchoring part away from plane of symmetry side and the tensioning thousand that is connected with compressor wire
Jin top (6)；The tensioning anchoring part includes being used for the anchoring part bottom plate (7) installed in box beam beam bottom, and is hung down with anchoring part bottom plate one end
The anchoring part riser (8) being directly fixedly connected, the installation crab-bolt are arranged on anchoring part bottom plate, and pre- answer is provided with the anchoring part riser
The through hole that power steel wire passes through, described two anchor slabs are bonded setting with two anchoring part risers respectively, and the compressor wire passes through logical
Hole and the mounting hole of anchor slab, the compressor wire is through being provided with intermediate plate (9), the compressor wire and steel wire at anchor slab
Space pours in net is used to the prestressing force of compressor wire being scattered in high-strength and high-ductility ring filled with high-strength and high-ductility epoxy concrete
In oxygen concrete, limiting plate (10) is provided between the anchor slab and stretch-draw jack of the stretch-draw jack side.
A kind of 2. box beam beam bottom prestressing force enhancing bracing means according to claim 1, it is characterised in that the prestressing force
Steel wire is high tensile steel wire.
A kind of 3. box beam beam bottom prestressing force enhancing bracing means according to claim 2, it is characterised in that the installation anchor
Bolt is chemical anchor bolts.
A kind of 4. box beam beam bottom prestressing force enhancing bracing means according to claim 3, it is characterised in that the chemical anchors
Bolt is four and is uniformly arranged into square on anchoring part bottom plate.
5. a kind of box beam beam bottom prestressing force enhancing bracing means according to claim 4, it is characterised in that described pre-
Stress wire is four and to be arranged side by side, and the through hole on the anchoring part riser is four and is arranged side by side, and the anchor slab is and anchor
Four hole anchor slabs of seat riser matching, the limiting plate are the four hole limiting plates matched with four hole anchor slabs.
6. the construction method of the box beam beam bottom prestressing force enhancing bracing means described in any one of Claims 1 to 5, its feature exist
In comprising the following steps：
(1) first rule and slot at box beam beam bottom, bury two tensioning anchoring parts；
(2) two anchor slabs are fitted on the outside of two anchoring part risers, two is passed through through compressor wire and in compressor wire
Intermediate plate is set at anchor slab；
(3) limiting plate is set stretch-draw jack side need to be installed, then stretch-draw jack is connected with compressor wire；
(4) slowly oil-feed tensioning stretch-draw jack to design pulling force, cuts off unnecessary compressor wire；
(5) after compressor wire completes tensioning, steel wire is inserted between compressor wire and box beam beam bottom；
(6) epoxy concrete form erection is carried out；
(7) after the completion of epoxy concrete form is set up, high-strength and high-ductility epoxy concrete is inserted, space in compressor wire and steel wire is entered
Row cast closing；
(8) after the completion of the high-strength high viscous high tenacity epoxy concrete construction in box beam beam bottom, age reaches progress pine after design load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711033723.1A CN107815979A (en) | 2017-10-30 | 2017-10-30 | A kind of box beam beam bottom prestressing force enhancing bracing means and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711033723.1A CN107815979A (en) | 2017-10-30 | 2017-10-30 | A kind of box beam beam bottom prestressing force enhancing bracing means and its construction method |
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| Publication Number | Publication Date |
|---|---|
| CN107815979A true CN107815979A (en) | 2018-03-20 |
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ID=61604456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711033723.1A Pending CN107815979A (en) | 2017-10-30 | 2017-10-30 | A kind of box beam beam bottom prestressing force enhancing bracing means and its construction method |
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| CN (1) | CN107815979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854024A (en) * | 2021-01-10 | 2021-05-28 | 山西省交通新技术发展有限公司 | Construction method of bonded prestressed structure for reinforcing hollow slab bridge |
Citations (6)
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|---|---|---|---|---|
| KR100328318B1 (en) * | 1998-10-22 | 2002-07-03 | 구민세 | Stiffness improvement of inner support section area by filling concrete in steel box girder bridge. |
| CN201184016Y (en) * | 2008-03-21 | 2009-01-21 | 四川省交通厅公路规划勘察设计研究院 | Low retracting amount steel hinge line anchorage |
| CN102900200A (en) * | 2012-10-09 | 2013-01-30 | 东南大学 | Intelligent FRP (Fiber Reinforce Plastic)-concrete composite structure and manufacturing method thereof |
| CN105887702A (en) * | 2016-04-20 | 2016-08-24 | 武汉理工大学 | Method for reinforcing concrete beam by prestressed carbon fiber plate and steel-concrete |
| CN106245540A (en) * | 2016-08-30 | 2016-12-21 | 河南省交通科学技术研究院有限公司 | A kind of based on retarded adhesive prestressed bridge strengthening system and reinforcement means |
| CN206070381U (en) * | 2016-08-31 | 2017-04-05 | 襄阳创天机械有限公司 | Beam body tension tool |
-
2017
- 2017-10-30 CN CN201711033723.1A patent/CN107815979A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100328318B1 (en) * | 1998-10-22 | 2002-07-03 | 구민세 | Stiffness improvement of inner support section area by filling concrete in steel box girder bridge. |
| CN201184016Y (en) * | 2008-03-21 | 2009-01-21 | 四川省交通厅公路规划勘察设计研究院 | Low retracting amount steel hinge line anchorage |
| CN102900200A (en) * | 2012-10-09 | 2013-01-30 | 东南大学 | Intelligent FRP (Fiber Reinforce Plastic)-concrete composite structure and manufacturing method thereof |
| CN105887702A (en) * | 2016-04-20 | 2016-08-24 | 武汉理工大学 | Method for reinforcing concrete beam by prestressed carbon fiber plate and steel-concrete |
| CN106245540A (en) * | 2016-08-30 | 2016-12-21 | 河南省交通科学技术研究院有限公司 | A kind of based on retarded adhesive prestressed bridge strengthening system and reinforcement means |
| CN206070381U (en) * | 2016-08-31 | 2017-04-05 | 襄阳创天机械有限公司 | Beam body tension tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112854024A (en) * | 2021-01-10 | 2021-05-28 | 山西省交通新技术发展有限公司 | Construction method of bonded prestressed structure for reinforcing hollow slab bridge |
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Application publication date: 20180320 |
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