CN207277884U - A kind of concrete beam strengthening structure that precast hole steel plate is set - Google Patents
A kind of concrete beam strengthening structure that precast hole steel plate is set Download PDFInfo
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- CN207277884U CN207277884U CN201721251503.1U CN201721251503U CN207277884U CN 207277884 U CN207277884 U CN 207277884U CN 201721251503 U CN201721251503 U CN 201721251503U CN 207277884 U CN207277884 U CN 207277884U
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Abstract
The utility model discloses a kind of concrete beam strengthening structure for setting precast hole steel plate, include successively from the inside to the outside：It is sprayed on and treats a floor height performance cement mortar tack coat at reinforced concrete beam beam bottom and both sides, wraps tightly residence and state the prefabricated of high-performance cement mortar bonding layer and open close hole U-shaped steel plate, be sprayed on the prefabricated high-performance cement mortar cover for opening close hole U-shaped steel plate outer surface, it is described prefabricated to open close hole U-shaped steel plate and described treat that the anchor bolt on reinforced concrete beam is fixedly connected with being fixed at the same time.The utility model can not only strengthen the cementitiousness of inside and outside high-performance water cement mortar, also significantly improve the corrosion resistance and fire resistance of ruggedized construction.In addition it is prefabricated to open close hole U-shaped steel plate and have good effect of contraction to internal high-performance cement mortar bonding layer and beams of concrete, with reference to high-performance cement mortar bonding layer, it is obviously improved the mechanical property for treating reinforced concrete beam.
Description
Technical field
It the utility model is related to a kind of building ruggedized construction, and in particular to a kind of beams of concrete that precast hole steel plate is set
Ruggedized construction.
Background technology
Since the aging of concrete structure, the irrational utilization of structure or building use the reasons such as the change of function, warp
The stress and deformation performance for often resulting in the part beams of concrete in structure cannot be met the requirements, therefore the reinforcement technique of beams of concrete
Have been more and more widely used.
Existing method for reinforcing concrete beam has：Increasing section method for strengthening, displacement concrete strengthening method, outer Prestressing add
Gu method, steel-encasing strengthening method, external debts model method for strengthening, stickup fibrous composite method for strengthening etc..Wherein, increasing section is reinforced
Method influences room headroom, replaces concrete strengthening method and the construction of additional prestressing is complicated, steel-encasing strengthening method and viscous
Patch fibrous composite method for strengthening need to weld or using structure glue, and fire resistance is poor.
External debts model method for strengthening has some outstanding advantages：Short construction period, field operation amount is few, does not change shape and makes
Use space.
But common external debts model method for strengthening needs to use structure glue, the durability of structure glue is poor, viscose glue it is horizontal and
Construction technology determines the quality of consolidation effect.Therefore it is very stringent to environmental requirement, and 60 should be not higher than by limiting environment temperature
DEG C, relative humidity should be not higher than 70%, if without special anti-corrosion measure, should not be used in hot and humid environment.
Utility model content
For problem present in existing concrete beam reinforcement technique, the purpose of this utility model is：A kind of set is provided
The concrete beam strengthening structure of precast hole steel plate.
The purpose of this utility model is achieved through the following technical solutions：
A kind of concrete beam strengthening structure for setting precast hole steel plate, includes successively from the inside to the outside：It is sprayed on and waits to reinforce
One floor height performance cement mortar tack coat of beams of concrete beam bottom and both sides, wrap tightly residence and state high-performance cement mortar bonding layer
It is prefabricated to open close hole U-shaped steel plate, be sprayed on the prefabricated high-performance cement mortar cover for opening close hole U-shaped steel plate outer surface, institute
State and prefabricated open close hole U-shaped steel plate and described treat that the anchor bolt on reinforced concrete beam is fixedly connected with being fixed at the same time.
Further, the prefabricated edge of a wing for opening close hole U-shaped steel plate and close hole is opened up on web, opens up close hole parallel
Cloth and it is abound with the prefabricated edge of a wing and web for opening close hole U-shaped steel plate.
Further, the single hole shape in the close hole is round hole, slotted hole or rectangular opening.
Further, if the single hole shape in the close hole is slotted hole or rectangular opening, prefabricated to open close hole U-shaped described
On the edge of a wing of steel plate, the long side direction of the slotted hole or rectangular opening is parallel to the longitudinal direction for treating reinforced concrete beam, pre-
System is opened on the web of close hole U-shaped steel plate, and the short side direction of the slotted hole or rectangular opening is parallel to treating the vertical of reinforced concrete beam
To direction.
Further, the prefabricated edge of a wing for opening close hole U-shaped steel plate and some bolts hole are uniformly provided with web, it is described
Treat reinforcement longitudinal direction parallel arrangement into two row, the spiral shell in bolt hole edge on the prefabricated edge of a wing for opening close hole U-shaped steel plate
Treat reinforcement longitudinal direction parallel arrangement into two to three row in keyhole edge on the prefabricated web for opening close hole U-shaped steel plate.Bolt
Hole aperture is determined with spacing by carrying out force analysis to ruggedized construction.
Further, the prefabricated position opened close hole U-shaped steel plate and offer bolt hole, twice of diameter of bolt hole model of surrounding
Close hole is not opened up in enclosing.
It is further, described that prefabricated to open close hole U-shaped steel plate thickness be 2 ~ 5mm；The high-performance cement mortar cover
Thickness be 10 ~ 15mm；The thickness of the high-performance cement mortar bonding layer is 10 ~ 20mm.
The utility model is had the following advantages relative to the prior art and effect：
1st, the utility model can make high-performance cement mortar cover and tack coat prefabricated open close hole U-shaped steel plate by described
Precast hole tight bond, the cementitiousness of inside and outside high-performance water cement mortar can not only be strengthened, moreover it is possible to significantly improve reinforcing knot
The corrosion resistance and fire resistance of structure.
2nd, the prefabricated of the utility model opens close hole U-shaped steel plate to internal high-performance cement mortar bonding layer and beams of concrete
There is good effect of contraction, high-performance cement mortar bonding layer can be made to give full play to its outstanding tension and deformability.Due to
Combination of the above acts on, and high-performance cement mortar bonding layer and protective layer, prefabricated open close hole U-shaped steel plate and treat reinforced concrete beam
Four can form entirety, common stress and deformation, considerably enhance the mechanical property for treating reinforced concrete beam.
3rd, close hole U-shaped steel plate prefabrication production is opened, scene need not weld, and be not required to formwork, operational procedure is simple, can
Effectively accelerate speed of application and reduce cost of labor.
Brief description of the drawings
Fig. 1 is the sectional axonometric drawing of the utility model embodiment.
Fig. 2 is the longitudinal sectional drawing of the utility model embodiment.
Fig. 3 is the transverse cross-sectional view of the utility model embodiment.
It is shown in figure：1- high-performance cement mortar covers；2- anchor bolts；3- is prefabricated to open close hole U-shaped steel plate；4- high
Performance cement mortar tack coat；6- treats reinforced concrete beam.
Embodiment
The purpose of this utility model is described in further detail below by specific embodiment, embodiment cannot be herein
Repeat one by one, but therefore the embodiment of the utility model is not defined in following embodiments.
Embodiment one
As shown in Figure 1 to Figure 3, a kind of concrete beam strengthening structure for setting precast hole steel plate, is wrapped successively from the inside to the outside
Include：It is sprayed on and treats a floor height performance cement mortar tack coat 4 at 5 beam bottom of reinforced concrete beam and both sides, wraps tightly residence and state high property
Energy the prefabricated of cement mortar tack coat opens close hole U-shaped steel plate 3, is sprayed on the prefabricated high property for opening close hole U-shaped steel plate outer surface
Can cement mortar protective course 1, it is described prefabricated to open close hole U-shaped steel plate 3 at the same time with being fixed on the anchor treated on reinforced concrete beam 5
Fixing bolt 2 is fixedly connected.
The prefabricated edge of a wing for opening close hole U-shaped steel plate 3 and close hole is opened up on web, open up close hole parallel arrangement and be abound with
Single hole shape in the close hole on the prefabricated edge of a wing for opening close hole U-shaped steel plate and web is rectangular opening, the long side of rectangular opening
For 10 ~ 20mm, a length of 5 ~ 8mm of short side.
If the single hole shape in the close hole is slotted hole or rectangular opening, in the prefabricated wing for opening close hole U-shaped steel plate 3
On edge, the long side direction of the slotted hole or rectangular opening opens close hole parallel to the longitudinal direction for treating reinforced concrete beam 5 prefabricated
On the web of U-shaped steel plate 3, the short side direction of the slotted hole or rectangular opening is parallel to the longitudinal direction for treating reinforced concrete beam 5.
The prefabricated edge of a wing for opening close hole U-shaped steel plate 3 and some bolts hole are uniformly provided with web, the bolt hole exists
Along reinforcement longitudinal direction parallel arrangement is treated into two row on the prefabricated edge of a wing for opening close hole U-shaped steel plate 3, the bolt hole is in institute
Stating edge on the prefabricated web for opening close hole U-shaped steel plate treats reinforcement longitudinal direction parallel arrangement into two to three row.Bolt hole aperture with
Spacing is determined by carrying out force analysis to ruggedized construction.The prefabricated position opened close hole U-shaped steel plate 3 and offer bolt hole,
Close hole is not opened up in the range of twice of diameter of bolt hole of surrounding.
The described prefabricated thickness for opening close hole U-shaped steel plate 3 is 4mm, type of steels Q235, actual measurement yield strength 269.8
MPa, 407.7 Mpa of tensile strength.The thickness of the high-performance cement mortar cover 1 is 10 ~ 15mm；The high-performance cement
The thickness of mortar bonding layer 4 is 10 ~ 20mm.
Embodiment two
A kind of construction method of such as concrete beam strengthening structure, including step：
1）Dabbing processing, chisel goes to treat the decorative layer of 6 outer surface of reinforced concrete beam and the serious concrete of carbonization, and will treat
Concrete dabbing, the moistening of 6 outer surface of reinforced concrete beam；
2）High-performance cement mortar bonding layer is sprayed, the mortar laminated repeatedly even application of high-performance cement is being treated into reinforcement
Outer surface, sprays 2 ~ 3 times, and adhesive layer thickness is controlled in design thickness；
3）Install it is prefabricated open close hole U-shaped steel plate 3, by it is prefabricated open close hole U-shaped steel plate 3 and be sleeved on treat 6 appearance of reinforced concrete beam
Face, and strike and pound U-shaped steel plate, it is close to high-performance cement mortar bonding layer 4；
4）Fastening bolt 2 is installed, in the prefabricated bolt hole position opened and reserved on close hole U-shaped steel plate, fastening bolt is implanted into, twists
It is tight to reinforce；
5）High-performance cement mortar cover is sprayed, first close hole site is opened in prefabricated U shape steel plate and nearby sprays high-performance
Cement mortar, then carries out integral spray, is sprayed into protective layer design thickness 2 ~ 3 times for same point during integral spray.
In addition, the high-performance cement mortar cover 1 is sprayed before 4 initial set of high-performance cement mortar bonding layer
Apply, so as to ensure that both can consolidate bonding.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model and from above-mentioned
The limitation of embodiment, the change made under other any Spirit Essences and principle without departing from the utility model, modify, replace
Generation, combination, simplify, and should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (7)
1. a kind of concrete beam strengthening structure that precast hole steel plate is set, it is characterised in that include successively from the inside to the outside：Spraying
High-performance water cement mortar is stated treating a floor height performance cement mortar tack coat at reinforced concrete beam beam bottom and both sides, wrap tightly residence
The prefabricated of tack coat opens close hole U-shaped steel plate, is sprayed on the prefabricated high-performance water cement mortar guarantor for opening close hole U-shaped steel plate outer surface
Sheath, it is described prefabricated to open close hole U-shaped steel plate and described treat that the anchor bolt on reinforced concrete beam is fixedly connected with being fixed at the same time.
2. the concrete beam strengthening structure according to claim 1 that precast hole steel plate is set, it is characterised in that：It is described pre-
System is opened and opens up close hole on the edge of a wing and web of close hole U-shaped steel plate, open up close hole parallel arrangement and be abound with it is described it is prefabricated open it is close
On the edge of a wing and web of hole U-shaped steel plate.
3. the concrete beam strengthening structure according to claim 2 that precast hole steel plate is set, it is characterised in that：It is described close
The single hole shape in hole is round hole, slotted hole or rectangular opening.
4. the concrete beam strengthening structure according to claim 3 that precast hole steel plate is set, it is characterised in that：It is if described
When the single hole shape in close hole is slotted hole or rectangular opening, then on the prefabricated edge of a wing for opening close hole U-shaped steel plate, the slotted hole
Or the long side direction of rectangular opening is parallel to the longitudinal direction for treating reinforced concrete beam, on the prefabricated web for opening close hole U-shaped steel plate,
The short side direction of the slotted hole or rectangular opening is parallel to the longitudinal direction for treating reinforced concrete beam.
5. the concrete beam strengthening structure according to claim 1 that precast hole steel plate is set, it is characterised in that：It is described pre-
System is opened some bolts hole is uniformly provided with the edge of a wing and web of close hole U-shaped steel plate, and the bolt hole prefabricated opens close hole U described
Along treating reinforcement longitudinal direction parallel arrangement into two row on the edge of a wing of shape steel plate, prefabricated to open close hole U-shaped described for the bolt hole
Edge treats reinforcement longitudinal direction parallel arrangement into two to three row on the web of steel plate.
6. the concrete beam strengthening structure according to claim 5 that precast hole steel plate is set, it is characterised in that：It is described pre-
System opens the position that close hole U-shaped steel plate offers bolt hole, and close hole is not opened up in the range of twice of diameter of bolt hole of surrounding.
7. the concrete beam strengthening structure according to claim 1 that precast hole steel plate is set, it is characterised in that：Described
It is prefabricated that to open close hole U-shaped steel plate thickness be 2 ~ 5mm；The thickness of the high-performance cement mortar cover is 10 ~ 15mm；The high property
The thickness of energy cement mortar tack coat is 10 ~ 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721251503.1U CN207277884U (en) | 2017-09-27 | 2017-09-27 | A kind of concrete beam strengthening structure that precast hole steel plate is set |
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| CN201721251503.1U CN207277884U (en) | 2017-09-27 | 2017-09-27 | A kind of concrete beam strengthening structure that precast hole steel plate is set |
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| CN207277884U true CN207277884U (en) | 2018-04-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575038A (en) * | 2017-09-27 | 2018-01-12 | 华南理工大学 | A kind of concrete beam strengthening structure and its construction method that precast hole steel plate is set |
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2017
- 2017-09-27 CN CN201721251503.1U patent/CN207277884U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575038A (en) * | 2017-09-27 | 2018-01-12 | 华南理工大学 | A kind of concrete beam strengthening structure and its construction method that precast hole steel plate is set |
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