CN106906753B - Method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength - Google Patents
Method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength Download PDFInfo
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- CN106906753B CN106906753B CN201710054051.6A CN201710054051A CN106906753B CN 106906753 B CN106906753 B CN 106906753B CN 201710054051 A CN201710054051 A CN 201710054051A CN 106906753 B CN106906753 B CN 106906753B
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- Prior art keywords
- stretching
- anchor
- cross beam
- prestress
- strength
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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
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Abstract
The invention discloses a kind of methods of no anchor Prestressed U type high-strength steel wire mash reinforced concrete member, including 1) set up stretching bed seat；2) prestress wire is installed；3) prestress wire tensioning；4) beam bottom punches bar planting；5) U-shaped steel twisted wire is installed；6) polymer mortar outer layer sprays；7) prestress steel twist line end on stretching end fixed cross beam is cut, stretching bed seat is removed, reinforcing finishes.Without anchor in of the invention, reinforcing layer thickness is small, and from heavy and light, reinforcing layer adhesive property is good, construction is convenient, angle point region is not easy to crack after reinforcing, and consolidation effect is excellent and adaptable.
Description
Technical field
The present invention relates to bridge or other Structures Reinforced Technique fields, more particularly to a kind of no anchor prestressing force
The method of high-strength U-shaped steel wire mesh reinforced concrete member.
Background technology
In order to extend the service life of reinforced beam, generally requires to reinforce it, how to keep former
Component is reinforced or repaired transformation on the basis of not tearing open be the big hot spot in industry.Wherein prestress steel strand reinforced technology
Have many advantages, such as that dead weight increases that small, endurance quality is good, has good compatibility between mortar and concrete, receives that reinforce boundary green
It looks at, is widely used in the structural fortifications such as bridge construction.But in Practical Project, prestress wire is arranged as beam bottom longitudinal direction cloth
Muscle, web is with beam bottom angle point region since stress concentration is easy to crack；The fixing devices such as angle steel need to be set when steel strand tension, but added
Gu the stretching and anchoring devices such as angle steel are arranged in layer will certainly increase the thickness of mortar reinforcing layer, and then increase the dead weight of beam, engineering
Practical adaptability is not strong enough.
Invention content
The technical problem to be solved by the present invention is to：It provides in a kind of reinforcing layer without anchor, it is small to reinforce layer thickness, from
Heavy and light, reinforcing layer adhesive property are good, construction is convenient, angle point region is not easy to crack after reinforcing, and consolidation effect is excellent and adaptable
The method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength.
Technical solution is used by the present invention solves the above problems：A kind of no anchor prestressed high-strength U-shaped steel strand
The method of gauze reinforced concrete member, including wait for that the bottom of reinforcement of rc beam is equipped with the U-shaped reinforcing system for reinforcing
System, the U-shaped hardened system include being coated on the U-shaped mortar fixed bed, longitudinally spaced for waiting for reinforcement of rc beam bottom
The lateral U-shaped steel twisted wire for arranging baseboard prestress steel strand wires, web prestress wire and lateral separation arrangement, specifically include with
Lower operating procedure：
1) stretching bed seat, is set up, waits for that reinforced concrete beam bottom is managed：Prestress wire stretching bed seat is set up in reinforcement
Bottom, and treat reinforced concrete beam bottom and carry out dabbing, it is removed after dabbing and loosens concrete block, increase screed and reinforced concrete
Face layer bonds；
2), prestress wire is installed：It gets all the longitudinal prestressing high strength steel strand and corresponding multiple anchor buttons ready, utilizes tensioning
The anchored end fixed cross beam and stretching end fixed cross beam of pedestal are by entire row baseboard prestress steel strand wires and web prestress wire
It wears, the both ends of every prestress wire respectively penetrate two anchor buttons, and in the stretching end moved cross beam of stretching bed seat and open
Anchor button is reserved between pull end fixed cross beam, then fixes the extruding of the anchor button of anchored end and tensioning fixing end；
3), prestress wire tensioning：By between the stretching end moved cross beam and stretching end fixed cross beam of stretching bed seat
Jack unit top pressure, tensioning entire row prestress wire squeezes above-mentioned reserved anchor button when prestressing force reaches design value
Pressure anchoring, tensioning finish；
4), beam bottom punches bar planting；It is punched in one determining deviation electric drill of beam bottom position, anchoring adhesive is perfused in hole, be implanted into reinforcing bar；
5) U-shaped steel twisted wire is installed：Beam bottom installs U-shaped steel twisted wire, is positioned using steel wire and the binding of baseboard prestress steel strand wires,
Form prestressed high-strength steel wire mesh；
6) polymer mortar outer layer sprays：Beam bottom sprays interface agent layer, keeps beam bottom moistening cleaning, sprayed-on polymer mortar
Face layer, Cement Mortar Used in Capital is until face layer reaches curing strength；
7) prestress steel twist line end on stretching end fixed cross beam, is cut, stretching bed seat is removed, reinforcing finishes.
Compared with the prior art, the advantages of the present invention are as follows：For existing Practical Project high strength steel strand reinforced concrete
There are prestressed stretch-draw and reinforce the problems such as back rest angle point region is easy to crack in structure, present invention employs in reinforcing layer without anchoring
The U-shaped reinforcing of prestressed high-strength steel wire mesh of device, has the following advantages：
1. effectively reducing the thickness of reinforcing layer without anchor in concrete structure reinforcement layer after reinforcing, mitigate
Dead load.
2. the U-shaped reinforced concrete member of prestressed high-strength steel wire mesh, longitudinal by beam bottom and web region simultaneous tension
Steel strand wires, and high-strength prestressed steel wire mesh is formed with lateral U-shaped steel twisted wire, solve beam bottom angle point region difficulty easy to crack
Topic.
3. high strength steel strand applies prestressing force by reinforcing layer mortar bonding gives ruggedized construction, mortar material is given full play to
Energy；Ensure the adhesive property of reinforcing layer and former xoncrete structure by the measures such as beam bottom bar planting and U-shaped reinforcing simultaneously.
4. prestress wire tensioning uses entire row tensioning, construction is convenient, substantially increases construction efficiency.
5. the existing high strength steel strand prestressing force of comparison applies by anchor, and screed itself is only outer protective layer
Substantially it is not involved in structure stress；This item method transmits high strength steel strand prestressing force by bonding for mortar fixed bed itself so that
The service efficiency of mortar layer material greatly promotes.
Description of the drawings
Fig. 1 is applying for the method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength of the present invention
Work schematic diagram.
The U-shaped hardened system without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength of Fig. 2 present invention
Schematic diagram.
Fig. 3 is the enlarged structure schematic diagram of the pedestal part of Fig. 1.
Fig. 4 is the section signal without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength of the present invention
Figure.
In Fig. 1-4：1 web steel strand wires, 2 bottom plate steel strand wires, 3 anchor buttons, 4U molding sand pulp layer, 5 reinforcement of rc beam, 6
Operating platform, 7 pedestal longerons, 8 pedestal columns, 9 anchored end fixed cross beams, 10 stretching end fixed cross beams, 11 stretching end movable transverses
Beam, 12 jack, 13 guide rails, 14 fixed seats.
Specific implementation mode
The embodiment of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figs 1-4, a method of without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength,
Including waiting for that the bottom of reinforcement of rc beam is equipped with the U-shaped hardened system for reinforcing, the U-shaped hardened system includes packet
It is pre- to be overlying on the U-shaped mortar fixed bed, longitudinally spaced arrangement baseboard prestress steel strand wires, web for waiting for reinforcement of rc beam bottom
Prestress steel strand and the lateral U-shaped steel twisted wire of lateral separation arrangement (use baseboard prestress high strength steel ream during actual implementation
Line, web prestressed high-strength steel strand wires and laterally U-shaped common steel strand wires, the known baseboard prestress high-strength steel of those skilled in the art
Twisted wire and web prestressed high-strength steel strand wires, which are thinner steel strand wires, to be realized, that is to say, that it is necessarily than common steel strand wires
It is thin.) specifically include following operating procedure：
1) stretching bed seat, is set up, waits for that reinforced concrete beam bottom is managed：Prestress wire stretching bed seat is set up in reinforcement
Bottom, and treat reinforced concrete beam bottom and carry out dabbing, it is removed after dabbing and loosens concrete block, increase screed and reinforced concrete
Face layer bonds；
2), prestress wire is installed：It gets all the longitudinal prestressing high strength steel strand and corresponding multiple anchor buttons ready, utilizes tensioning
The anchored end fixed cross beam and stretching end fixed cross beam of pedestal are by entire row baseboard prestress steel strand wires and web prestress wire
It wears, the both ends of every prestress wire respectively penetrate two anchor buttons, and in the stretching end moved cross beam of stretching bed seat and open
Anchor button is reserved between pull end fixed cross beam, then fixes the extruding of the anchor button of anchored end and tensioning fixing end；
3), prestress wire tensioning：By between the stretching end moved cross beam and stretching end fixed cross beam of stretching bed seat
Jack unit top pressure, tensioning entire row prestress wire squeezes above-mentioned reserved anchor button when prestressing force reaches design value
Pressure anchoring, tensioning finish；
4), beam bottom punches bar planting；It is punched in one determining deviation electric drill of beam bottom position, anchoring adhesive is perfused in hole, be implanted into reinforcing bar；
5) U-shaped steel twisted wire is installed：Beam bottom installs U-shaped steel twisted wire, is positioned using steel wire and the binding of prestressed high-strength steel strand wires,
Form prestressed high-strength steel wire mesh；
6) polymer mortar outer layer sprays：Beam bottom sprays interface agent layer, keeps beam bottom moistening cleaning, sprayed-on polymer mortar
Face layer, Cement Mortar Used in Capital is until face layer reaches curing strength；
7) prestress steel twist line end on stretching end fixed cross beam, is cut, stretching bed seat is removed, reinforcing finishes.
In step 2), the positioning hole groove of stretching end moved cross beam, stretching end fixed cross beam and anchored end fixed cross beam is equal
Equally arrange.
In step 2), the prestress wire aluminium anchor button of stretching end fixed cross beam and anchored end fixed cross beam, which squeezes, to be anchored
Afterwards, it should ensure that steel strand wires relaxation therebetween, ensure that later stage tension steel strand has enough tensioning length.
In step 3), when prestressing force reaches design value, squeezes pincers strength and squeeze stretching end moved cross beam steel strand wires aluminium
Anchor button is anchored, and prestressing force is undertaken by the longeron of stretching bed seat, should prevent longeron buckling failure.
In step 5), until face layer reaches curing strength, cutting prestress steel twist line end, prestressing force turns Cement Mortar Used in Capital
It is undertaken by mortar fixed bed cohesive force, ensures that polymer mortar adhesive property is good.
As shown in Figs 1-4, a kind of for operating the present invention without anchor without anchor prestressed high-strength U-shaped steel twisted wire
The assembled pedestal of pre-tensioning system steel strand tension used in the method for net reinforced concrete member, including interval are vertically arranged
Multiple anchored end fixed cross beams 9 for being used for fixed supported pedestal column 8, being fastened transversely to pedestal one end are fastened transversely to platform
Seat the other end stretching end fixed cross beam 10 and with 10 spaced stretching end moved cross beam 11 of stretching end fixed cross beam, and
Jack 12 for stretch-draw prestressing force is installed between pull end fixed cross beam 10 and stretching end moved cross beam 11；Bottom plate steel strand wires
2 and the anchored ends of web steel strand wires 1 outside of anchored end fixed cross beam 9, bottom plate steel strand wires are fixed on by the anchor button 3 of anchored end
2 and the fixation stretching ends of web steel strand wires 1 10 outside of stretching end fixed cross beam is fixed on by the anchor button 3 of fixed stretching end；And
The movable stretching end of bottom plate steel strand wires 2 and web steel strand wires 1 is fixed on stretching end moved cross beam 11 by the anchor button 3 of movable Zhang Duan
Outside.
Pedestal column upper edge waits for that the length direction space-stop rack of reinforcement of rc beam is equipped with pedestal longeron 7, and anchored end is solid
Determine beam 9 and stretching end fixed cross beam 10 is respectively placed in the both sides for waiting for reinforcement of rc beam and is fixedly installed in pedestal column 8
On；And on anchored end fixed beam 9, stretching end fixed cross beam 10 and stretching end moved cross beam 11 it is laterally spaced be arranged with it is multiple
Lashing hole for being passed through for bottom plate steel strand wires 2.
The bottom of stretching end moved cross beam 11 is equipped with the guide rail for being oriented to the movement of stretching end moved cross beam 11
13。
U-shaped mortar fixed bed is corresponded on anchored end fixed cross beam 9, stretching end fixed cross beam 10 and stretching end moved cross beam 11
It is arranged with vertically arranged fixed seat 14 at the position of 4 webs, and has vertically been alternatively arranged multiple use in fixed seat 14
In the lashing hole passed through for web steel strand wires 1, and fixed seat 14 and the mating surface of anchor button 3 are plane.
Wait for that the beam bottom of reinforcement of rc beam is arranged right below construction operation platform 6, and construction operation platform 6 is fixed on
On pedestal column 8.
Using the pre-tensioning system steel strand tension assembled pedestal its has the following advantages：
1) steel strand reinforced beam is overcome by assembled stretching bed seat to be only capable of carrying out post-tensioning by fixing devices such as angle steel
Method tensioning, and pre-tensioning system tensioning is carried out using the good adhesive property of mortar reinforcing layer, reinforcing layer thickness is effectively reduced, is prevented
Reinforcing layer mortar cracks, and reduces the dead weight of reinforcing layer.
2) by stretching end moved cross beam can disposable integral tension entire row steel strand wires, relatively existing post stretching steel twists
The tension technology of line, the constructing operation efficiency greatly speeded up.
3) work progress assembling operates, and process is easy, and all components of assembled stretching bed seat are all steel fitting, are repeated
It utilizes, it is environmentally protective.
4) after the complete anchoring of steel strand tension, there is early period pedestal longeron to undertake prestressing force, and reach intensity in mortar reinforcing layer
Afterwards, anchored end steel strand wires are cut, prestressing force turns to be undertaken by mortar reinforcing layer, and work progress stress is clear, securely and reliably.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not only limited to above example, and concrete structure is allowed to vary.All protection models in independent claims of the present invention
Various change all falls in the scope of protection of the present invention made by enclosing.
Claims (5)
1. a kind of method of the U-shaped steel wire mesh reinforced concrete member of no anchor prestressed high-strength, it is characterised in that：Including
Wait for that the U-shaped hardened system for reinforcing that the bottom of reinforcement of rc beam is equipped with, the U-shaped hardened system include cladding
In waiting for that the U-shaped mortar fixed bed, longitudinally spaced arrangement baseboard prestress steel strand wires, web of reinforcement of rc beam bottom answer in advance
Power steel strand wires and the lateral U-shaped steel twisted wire of lateral separation arrangement, specifically include following operating procedure：
1) stretching bed seat, is set up：Wait for that reinforced concrete beam bottom is managed：Prestress wire stretching bed seat is set up in reinforcement bottom,
And it treats reinforced concrete beam bottom and carries out cleaning work；
2), prestress wire is installed：It gets all the longitudinal prestressing high strength steel strand and corresponding multiple anchor buttons ready, utilizes stretching bed seat
Anchored end fixed cross beam and stretching end fixed cross beam entire row baseboard prestress steel strand wires and web prestress wire are worn
Good, the both ends of every prestress wire respectively penetrate two anchor buttons, and in the stretching end moved cross beam and stretching end of stretching bed seat
Anchor button is reserved between fixed cross beam, then fixes the extruding of the anchor button of anchored end and tensioning fixing end；
3), prestress wire tensioning：Pass through the top between the stretching end moved cross beam and stretching end fixed cross beam of stretching bed seat
Pressure device top pressure, tensioning entire row prestress wire carry out extruding anchor when prestressing force reaches design value to above-mentioned reserved anchor button
Gu tensioning finishes；
4), beam bottom punches bar planting：It is punched in one determining deviation electric drill of beam bottom position, anchoring adhesive is perfused in hole, be implanted into reinforcing bar；
5) U-shaped steel twisted wire is installed：Beam bottom installs U-shaped steel twisted wire, is positioned, is formed using steel wire and the binding of prestressed high-strength steel strand wires
Prestressed high-strength steel wire mesh；
6) polymer mortar outer layer sprays：Beam bottom sprays interface agent layer, keeps beam bottom moistening cleaning, sprayed-on polymer mortar face
Layer, Cement Mortar Used in Capital is until face layer reaches curing strength；
7) prestress steel twist line end on stretching end fixed cross beam, is cut, stretching bed seat is removed, reinforcing finishes.
2. the method for the U-shaped steel wire mesh reinforced concrete member of no anchor prestressed high-strength according to claim 1,
It is characterized in that：In step 2), stretching end moved cross beam, stretching end fixed cross beam and anchored end fixed cross beam positioning hole groove
Equally arrange.
3. the method for the U-shaped steel wire mesh reinforced concrete member of no anchor prestressed high-strength according to claim 1,
It is characterized in that：In step 2), stretching end fixed cross beam and the prestress wire aluminium anchor button of anchored end fixed cross beam squeeze
After anchoring, it should ensure that steel strand wires relaxation therebetween, ensure that later stage tension steel strand has enough tensioning length.
4. the method for the U-shaped steel wire mesh reinforced concrete member of no anchor prestressed high-strength according to claim 1,
It is characterized in that：In step 3), when prestressing force reaches design value, squeezes pincers strength and squeeze stretching end moved cross beam steel strand wires
Aluminium anchor button is anchored, and prestressing force is undertaken by the longeron of stretching bed seat, should prevent longeron buckling failure.
5. the method for the U-shaped steel wire mesh reinforced concrete member of no anchor prestressed high-strength according to claim 1,
It is characterized in that：In step 5), Cement Mortar Used in Capital until face layer reaches curing strength, answer in advance by cutting prestress steel twist line end
Power turns to be undertaken by mortar fixed bed cohesive force, ensures that polymer mortar adhesive property is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054051.6A CN106906753B (en) | 2017-01-24 | 2017-01-24 | Method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054051.6A CN106906753B (en) | 2017-01-24 | 2017-01-24 | Method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength |
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| Publication Number | Publication Date |
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| CN106906753A CN106906753A (en) | 2017-06-30 |
| CN106906753B true CN106906753B (en) | 2018-11-06 |
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| CN201710054051.6A Expired - Fee Related CN106906753B (en) | 2017-01-24 | 2017-01-24 | Method without the U-shaped steel wire mesh reinforced concrete member of anchor prestressed high-strength |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109680807A (en) * | 2019-01-25 | 2019-04-26 | 华汇工程设计集团股份有限公司 | Anchor structure and method of the pre-tensioning system Prefabricated superposed beam steel strand wires in bean column node |
| 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 |
| CN114737784B (en) * | 2022-05-16 | 2024-04-12 | 郑州大学 | Tensioning and reinforcing member for reinforcing ECC (error correction code) pretightening force by high-strength stainless steel stranded wire net and construction method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2573616Y (en) * | 2002-09-05 | 2003-09-17 | 天津市天佳设备安装公司 | Built-up steel structure pretensioned pedestal |
| KR100497241B1 (en) * | 2003-04-14 | 2005-06-28 | 이승영 | Vibration reduced type bridge strengthening apparatus |
| CN201132364Y (en) * | 2007-10-15 | 2008-10-15 | 中铁二局股份有限公司 | Beam-making pedestal equipment for pretensioned prestressing concrete box beam |
| CN101279483A (en) * | 2008-05-29 | 2008-10-08 | 山东省公路建设（集团）有限公司 | Integral tension, relaxation system and technique for pre-tensioned prestressing tension technique |
| CN104264593B (en) * | 2014-09-05 | 2016-10-12 | 华侨大学 | The pre-stress stretching method of a kind of Near Surface Mounted muscle reinforcing and device |
| CN105952179A (en) * | 2016-06-01 | 2016-09-21 | 兰州理工大学 | Bonding prestress reinforced concrete girder reinforced through pre-tensioning method and reinforcing method |
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