CN103711328A - Reinforcing device of concrete beam and construction method thereof - Google Patents
Reinforcing device of concrete beam and construction method thereof Download PDFInfo
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- CN103711328A CN103711328A CN201310725869.8A CN201310725869A CN103711328A CN 103711328 A CN103711328 A CN 103711328A CN 201310725869 A CN201310725869 A CN 201310725869A CN 103711328 A CN103711328 A CN 103711328A
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- concrete beam
- bracing means
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- 239000004567 concrete Substances 0.000 title claims abstract description 100
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 title abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 239000011440 grout Substances 0.000 claims abstract description 32
- 239000011229 interlayer Substances 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 25
- 210000005056 cell body Anatomy 0.000 claims description 21
- 210000003414 extremity Anatomy 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 14
- 210000001364 upper extremity Anatomy 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 210000003141 lower extremity Anatomy 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 12
- 238000005728 strengthening Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000007596 consolidation process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000012946 outsourcing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The invention provides a reinforcing device of a concrete beam. The reinforcing device of the concrete beam comprises a steel groove body, inner distance rings and studs. The steel groove body is of the structure with the upper surface provided with an opening. The concrete beam can be sleeved with the steel groove body. An interlayer is arranged between the steel groove body and the concrete beam. The two sides of the long axis of the upper surface of the steel groove body respectively extend horizontally and outwards to form an upper wing platform. The studs are fixedly arranged on the upper wing platforms at intervals respectively. The inner distance rings are fixedly arranged on a groove defined by the side faces and the bottom face of the steel groove body at intervals. The steel groove body, the concrete beam and a grout blanket are fixedly connected together through the inner distance rings and the studs, so that the bending bearing performance and the shearing bearing performance of the concrete beam are improved, the grouting bracket is effectively prevented from shedding, and the long-term reinforcing effect is guaranteed. The invention further provides a construction method of the reinforcing device, and effective application of the reinforcing device is guaranteed.
Description
Technical field
The present invention relates to a kind of bracing means and construction method thereof of building structure, relate in particular to a kind of bracing means and construction method thereof of concrete beam.
Background technology
The disaster such as fire, earthquake can cause damage in various degree to reinforced concrete structure, but most of reinforced concrete structures still can normally be used after reinforcing reparation, thereby bring into play huge economic benefit, therefore, the repairing and reinforcement of reinforced concrete structure impaired or load-carrying properties deficiency is had great importance.At present, the reinforcement means of concrete beam mainly contains: Enlargement of Section, besides adhibit the fiber cloth method, outer sticking steel plate method, outsourcing angle steel method, outsourcing steel mesh reinforcement pea gravel concreten method, external prestressing method etc.The following problem of above-mentioned traditional reinforcement means ubiquity: (1) is for the concrete beam that has top layer damage, conventionally need to grouting material or pea gravel concreten, first carry out cross section reparation to cutting the top layer serious concrete residue beam section of damage, outer wrapping fiber cloth, angle steel, steel mesh reinforcement pea gravel concreten or apply external prestressing etc. and reinforce again afterwards, the caducous hidden danger of patching material that has top layer under long duration load and external environment condition acting in conjunction, affects long-term consolidation effect greatly.(2) between the reinforcement material pasting outside and the concrete beam surface of having repaired, easily there is the stripping damage of fragility.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of generation that can effectively avoid concrete surface repair layer to come off, the concrete beam strengthening device that keeps the outer reinforcement material pasting and repair layer to there is better bond and anchor property, reinforcement performance is good, good economy performance, practical, there is wide popularization and application prospect and good engineering using value.
Another object of the present invention is to provide a kind of construction method of using above-mentioned concrete beam strengthening device, step simple and clear, efficiency of the practice is high.
In order to solve above-mentioned technical problem, the bracing means of a kind of concrete beam provided by the invention, comprises steel cell body, inner split ring and peg; The structure that described steel cell body is upper surface open, and described steel cell body can be set in the outside of concrete beam; Between described steel cell body and described concrete beam, there is an interlayer; Along major axis both sides, each horizontally outward extends a upper limb platform to described steel cell body upper surface; The apart segment distance of described peg is fixedly arranged on respectively described upper limb platform; The apart segment distance of described inner split ring is fixedly arranged in the side of described steel cell body and groove that bottom surface surrounds.
As preferably, described steel cell body is steel U-lag body.
As preferably, described inner split ring is welded with bottom surface and the side of described groove respectively by the limb back of the body and the acropodium of three angle steel.
As preferably, described identical with the thickness of the described interlayer at this place with the limb height of angle steel of bottom surface welding of described groove.
As preferably, the angle steel of the side welding of described and described groove can be processed as the form that inferior limb is high, the high thickness that is slightly less than the described interlayer at this place of described limb.
As preferably, the angle steel of the side welding of described and described groove can be processed as the high narrow form of the high wide upper limbs of lower limb, and lower limb are high identical with the described thickness of interlayer at this place described in lower edge.
As preferably, the position of described peg is corresponding with the position of described inner split ring.
As preferably, described steel cell body is formed by steel plate cold bending.
Use a construction method for the bracing means of above-mentioned concrete beam, its concrete steps are:
1) cut concrete beam top layer because of fire, the serious concrete of environmental attack equivalent damage, the sectional dimension that cuts rear remaining concrete beam should meet designing requirement.
2) Drilling is also carried out on request in the position of determining grout hole in both sides and the floor junction of concrete beam.
3) by designing requirement, processing the bracing means of described a kind of concrete beam.
4) bottom portion of groove at described steel cell body first applies one deck grouting material laying.
5) cleaning damaged concrete beam surface; Then the bracing means of described a kind of concrete beam is sheathed on to concrete beam outside.
6) in grout hole, pour into grouting material, until grouting material overflows from adjacent grout hole, carry out continuously successively.
As preferably, the serious concrete of described damage refers to that strength grade is less than the concrete of C20.
As preferably, the position of the position of described grout hole and the inner split ring of design and peg matches, and also can between two adjacent grout holes, add grout hole as required.
As preferably, the tall and big 10-20mm of limb of the angle steel of the Thickness Ratio of described grouting material laying and the welding of described bottom portion of groove.
As preferably, described grout hole after grouting with described grouting material equating.
As preferably, described grouting material is early strength contraction-free grouting concrete of self-compaction pea gravel concreten or CGM.
As preferably, the concrete steps on described cleaning damaged concrete beam surface are: 24h before grouting, and concrete beam surface should be fully wetting; 1h before grouting, removes ponding; And on the surface of concrete beam, apply the agent of one deck architectural interface as required.
Adopt after technique scheme, a kind of concrete beam strengthening device provided by the invention, because it is consolidated steel cell body and concrete beam, grout blanket by inner split ring and peg.Compared with prior art, can save material, effectively avoid the generation of bond-slip between the caducous problem of grout blanket and reinforcement material and grout blanket under load and environment acting in conjunction of traditional reinforcement means, and can improve being subject to curved and being cut load-carrying properties of concrete beam simultaneously, guarantee consolidation effect; In addition, above-mentioned concrete beam strengthening device can be prefabricated in the factory, and simultaneously also can reduce template consumption during site operation, and simple in structure being easy to realized, applied range.
The present invention also proposes a kind of construction method of using above-mentioned concrete beam strengthening device, and step simple and clear can be guaranteed effective enforcement of above-mentioned Scheme of Strengthening.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the preferred embodiment of the present invention;
Fig. 2 is the Construction State transverse cross-sectional view of the preferred embodiment of the present invention;
Fig. 3 is the longitudinal side view of the Construction State of the preferred embodiment of the present invention;
Fig. 4 is the Construction State top view of the preferred embodiment of the present invention;
In figure:
1-steel U-lag body; 2-inner split ring; 3-peg; 4-grout hole; 5-cuts the concrete beam after damage layer; The 6-concrete floor edge of a wing.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated.
With reference to figure 1, the bracing means of a kind of concrete beam provided by the invention, for being sheathed on the steel cell body of concrete beam outside, the present embodiment is preferably steel U-lag body 1, inner split ring 2 and peg 3.Between described steel U-lag body and described concrete beam, there is an interlayer; Described steel U-lag body upper surface is each horizontal-extending one upper limb platform along major axis both sides.Described inner split ring is welded with bottom surface and the side of the U-shaped groove of described steel U-lag body 1 respectively by the limb back of the body of three angle steel and acropodium.The angle steel length of wherein welding mutually with the bottom surface of described U-shaped groove equates with the inner side clear span of described U-shaped groove, and limb is high, and to state the thickness of interlayer identical with this place; The angle steel welding mutually with the side of described U-shaped groove can be processed as the form that upper inferior limb is high or the high wide upper limbs height of lower limb is narrow, but the limb of lower limb height is identical with the thickness of the described interlayer at this place.This is mainly the low wide and up narrow situation of damage layer thickness of considering Concrete after Fire beam both sides.The position of described peg is corresponding with the position of described inner split ring, and is fixedly arranged on respectively described upper limb platform.
With reference to figure 2-4, on the concrete beam surface that suffers fire, cut the serious layer of concrete of damage, the serious concrete of described damage refers to that strength grade is less than the concrete of C20.The installation of the similar and applicable external reinforced device in the cross sectional shape that cuts the concrete beam 5 after the damage layer core space cross section that 500 ℃ of isotherms in concrete beam cross section surround during to three-face fire, should there be certain roughness bottom surface and both sides.
The vertical grout hole 4 of Drilling as required in the position of the corresponding inner split ring 2 in the both sides of concrete beam 5 and the junction of floor 6 and peg 3.Further, when distant between two adjacent grout holes, can require to supplement Drilling grout hole 4 in the middle of adjacent grout hole according to grouting construction.
The described concrete beam 5 cutting after damage layer is carried out to surface preparation: 24h before grouting, concrete beam surface should be fully wetting; 1h before grouting, removes ponding; And on the surface of concrete beam, apply the agent of one deck architectural interface as required.
U-shaped bottom portion of groove coating a layer thickness at steel U-lag body 1 is greater than after the grout blanket of the high 10mm-20mm of leg of angle that is welded in U-shaped bottom portion of groove, and described bracing means is tightly placed in to above-mentioned concrete beam 5 outsides through surface preparation from bottom to top.In described grout hole 4, pour into grouting material, until grouting material overflows from adjacent grout hole, carry out continuously successively.Described grouting material can be the contraction-free grouting concrete that self-compaction pea gravel concreten, CGM strength contraction-free grouting concrete morning etc. have some strength.By adjusting the thickness of steel U-lag body 1 and grout blanket, realize the anti-bend reinforced and Shear Strengthening of concrete beam 5, and can effectively avoid coming off of grout blanket.
After being in the milk, with described grouting material, fill and lead up described grout hole.
Adopt after technique scheme, a kind of concrete beam strengthening device provided by the invention, because it is consolidated steel U-lag body and concrete beam, grout blanket by inner split ring and peg.Compared with prior art, can save material, effectively avoid the generation of bond-slip between the caducous problem of grout blanket and reinforcement material and grout blanket under load and environment acting in conjunction of traditional reinforcement means, and can improve being subject to curved and being cut load-carrying properties of concrete beam simultaneously, guarantee consolidation effect; In addition, above-mentioned concrete beam strengthening device can be prefabricated in the factory, and simultaneously also can reduce template consumption during site operation, and simple in structure being easy to realized, applied range.
Product form of the present invention is not limited to this case diagram and embodiment, and anyone carries out suitable variation or the modification of similar thinking to it, all should be considered as not departing from patent protection category of the present invention.
Claims (16)
1. a bracing means for concrete beam, is characterized in that, comprises steel cell body, inner split ring and peg; The structure that described steel cell body is upper surface open, and described steel cell body can be set in the outside of concrete beam; Between described steel cell body and described concrete beam, there is an interlayer; Along major axis both sides, each horizontally outward extends a upper limb platform to described steel cell body upper surface; The apart segment distance of described peg is fixedly arranged on respectively described upper limb platform; The apart segment distance of described inner split ring is fixedly arranged in the side of described steel cell body and groove that bottom surface surrounds.
2. the bracing means of a kind of concrete beam according to claim 1, is characterized in that, described steel cell body is the U-shaped cell body of steel.
3. the bracing means of a kind of concrete beam according to claim 1, is characterized in that, described inner split ring is welded with bottom surface and the side of described groove respectively by the limb back of the body and the acropodium of three angle steel.
4. the bracing means of a kind of concrete beam according to claim 3, is characterized in that, described identical with the thickness of the described interlayer at this place with the limb height of angle steel of bottom surface welding of described groove.
5. the bracing means of a kind of concrete beam according to claim 3, is characterized in that, the angle steel that weld side described and described groove can be processed as the form that inferior limb is high, the high thickness that is slightly less than the described interlayer at this place of described limb.
6. the bracing means of a kind of concrete beam according to claim 3, it is characterized in that, the angle steel of the side welding of described and described groove can be processed as the high narrow form of the high wide upper limbs of lower limb, and lower limb are high identical with the described thickness of interlayer at this place described in lower edge.
7. the bracing means of a kind of concrete beam according to claim 1, is characterized in that, the position of described peg is corresponding with the position of described inner split ring.
8. the bracing means of a kind of concrete beam according to claim 1, is characterized in that, described steel cell body is formed by steel plate cold bending.
9. right to use requires a construction method for the bracing means of the concrete beam described in 1, and its concrete steps are:
1) cut concrete beam top layer because of fire, the serious top layer concrete of environmental attack equivalent damage, the sectional dimension that cuts rear remaining concrete beam should meet designing requirement;
2) Drilling is also carried out on request in the position of determining grout hole in both sides and the floor junction of concrete beam;
3) by the bracing means of the described a kind of concrete beam of designing requirement processing;
4) bottom portion of groove at described steel cell body first applies one deck grouting material laying;
5) cleaning damaged concrete beam surface; Then the bracing means of described a kind of concrete beam is sheathed on to concrete beam outside;
6) in described grout hole, pour into grouting material, until grouting material overflows from adjacent grout hole, carry out continuously successively.
10. the construction method of the bracing means of a kind of concrete beam according to claim 9, is characterized in that, the serious concrete of described damage refers to that strength grade is less than the concrete of C20.
The construction method of the bracing means of 11. a kind of concrete beam according to claim 9, it is characterized in that, the position of the position of described grout hole and the inner split ring of design and peg matches, and also can between two adjacent grout holes, add grout hole as required.
The construction method of the bracing means of 12. a kind of concrete beam according to claim 9, is characterized in that, the tall and big 10-20mm of limb of the angle steel of the Thickness Ratio of described grouting material laying and the welding of described bottom portion of groove.
The construction method of the bracing means of 13. a kind of concrete beam according to claim 9, is characterized in that, described grout hole after grouting with described grouting material equating.
The construction method of the bracing means of 14. a kind of concrete beam according to claim 9, is characterized in that, described grouting material is contraction-free grouting concrete.
The construction method of the bracing means of 15. a kind of concrete beam according to claim 9, is characterized in that, described grouting material is self-compaction pea gravel concreten or CGM strength contraction-free grouting concrete morning.
The construction method of the bracing means of 16. a kind of concrete beam according to claim 9, is characterized in that, the concrete steps on described cleaning damaged concrete beam surface are: 24h before grouting, and concrete beam surface should be fully wetting; 1h before grouting, removes ponding; And on the surface of concrete beam, apply the agent of one deck architectural interface as required.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310725869.8A CN103711328B (en) | 2013-12-25 | 2013-12-25 | The bracing means of a kind of beams of concrete and construction method thereof |
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| CN201310725869.8A CN103711328B (en) | 2013-12-25 | 2013-12-25 | The bracing means of a kind of beams of concrete and construction method thereof |
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| CN103711328A true CN103711328A (en) | 2014-04-09 |
| CN103711328B CN103711328B (en) | 2016-08-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057189A (en) * | 2014-05-23 | 2014-09-24 | 浙江东南网架股份有限公司 | Novel U-shaped cross section component, special jig frame and processing and setting method |
| CN104075077A (en) * | 2014-06-10 | 2014-10-01 | 北京豪特耐管道设备有限公司 | Heat insulating material for repairing heat pipeline and preparation method and application thereof |
| CN104863379A (en) * | 2015-05-11 | 2015-08-26 | 河南理工大学 | Strengthening member for special reinforced concrete beam, effective strengthening method and application thereof |
| CN108396986A (en) * | 2018-05-10 | 2018-08-14 | 上海建工二建集团有限公司 | reinforced structure and construction method of overlapped prefabricated L-shaped prestressed rib beam plate |
| CN114033205A (en) * | 2021-11-05 | 2022-02-11 | 北京航空航天大学 | Method for improving performance of existing steel-concrete composite beam |
| CN114541799A (en) * | 2022-01-26 | 2022-05-27 | 上海民航新时代机场设计研究院有限公司 | Concrete beam repairing structure and repairing method applicable to same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104057189A (en) * | 2014-05-23 | 2014-09-24 | 浙江东南网架股份有限公司 | Novel U-shaped cross section component, special jig frame and processing and setting method |
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| CN114033205A (en) * | 2021-11-05 | 2022-02-11 | 北京航空航天大学 | Method for improving performance of existing steel-concrete composite beam |
| CN114541799A (en) * | 2022-01-26 | 2022-05-27 | 上海民航新时代机场设计研究院有限公司 | Concrete beam repairing structure and repairing method applicable to same |
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| CN103711328B (en) | 2016-08-17 |
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