CN104746891A - Construction method for strengthening masonry structure by epoxy steel plates - Google Patents
Construction method for strengthening masonry structure by epoxy steel plates Download PDFInfo
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- CN104746891A CN104746891A CN201510047745.8A CN201510047745A CN104746891A CN 104746891 A CN104746891 A CN 104746891A CN 201510047745 A CN201510047745 A CN 201510047745A CN 104746891 A CN104746891 A CN 104746891A
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Abstract
The invention discloses a construction method for strengthening a masonry structure by epoxy steel plates. The construction method comprises the following steps that a weathered layer of the surface of the masonry structure is removed; rough chiseling is carried out to form a rough chiseling layer; steel nails are struck into the masonry structure; a steel bar mesh is suspended, and the steel bar mesh and the steel nails are welded together; concrete is sprayed to form a steel bar concrete transition layer; surface processing of the steel bar concrete transition layer and the surface processing of a steel strap bonding face are conducted; a steel strap is bonded; and anti-corrosion treatment of the surface of the steel strap is conducted. According to the construction method, the concrete is sprayed between masonry and the steel strap to form the steel bar concrete transition layer, the masonry very small in strength and steel high in strength are connected into a whole, the bonding force between the masonry and the steel is greatly increased, and compared with a traditional strengthening structure by the epoxy steel plates, the overall strength is obviously enlarged; furthermore, the construction method is practical, easy to implement, safe, reliable and capable of being widely applied to improving the protection of ancient buildings.
Description
Technical field
The present invention relates to a kind of construction method of civil construction project, especially a kind of construction method of masonry structure strengthening by epoxy-steel plate.
Background technology
In the process that ancient building structural strengthening and reinforcement protection are constructed, improve reinforced structure bulk strength problem and be difficult to solve always.Due to heritage buildings weathering, damaged degree and form of structure, loading characteristic difference, the method for employing is also different.In existing engineering reinforcement, reinforcement mainly comprises the methods such as carbon fiber, steel bonding, high pressure grouting, and wherein strengthening by epoxy-steel plate is due to high, the easy construction of stability, applied widely and be widely adopted in masonry structure.Although strengthening by epoxy-steel plate technology has used for many years, but, the basic skills of current employing is the way of directly pasting steel on masonry surface, namely the stickup between masonry surface and steel mainly relies on cementing agent, all also there is certain problem in the sticking strength between steel and masonry, stability, consolidation effect, bulk strength are also under some influence.Therefore the important topic that the bulk strength after wall reinforcement is masonry bearing capacity particularly ancient building stabilization works area research is improved.
Summary of the invention
The technical problem to be solved in the present invention, for overcoming weak point of the prior art, provides the construction method of a kind of practicality, simple masonry structure strengthening by epoxy-steel plate.
For solving technical problem of the present invention, the technical scheme adopted is: the construction method of masonry structure strengthening by epoxy-steel plate comprises the removing of masonry structure surface weathered layer, and in masonry surface mount steel, particularly,
Step 1, first will expose the surperficial dabbing of masonry structure of fresh, and obtain the roughened surface of masonry structure, then squeeze into steel nail in the mortar joint place of roughened surface;
Step 2, is first welded in mortar joint place and follows closely on the steel nail that has, then to sprayed mortar on reinforced mesh, obtain the steel concrete transition zone be overlying on masonry structure by reinforced mesh;
Step 3, first steel concrete transition zone to be polished and after dedusting, the surface smear cementing agent of bonding site thereon, then the steel band and bonding site, steel concrete transition zone surface that are coated with cementing agent are pasted, after to be bonded dose of solidification, preservative treatment is carried out to steel strip surface.
Further improvement as the construction method of masonry structure strengthening by epoxy-steel plate:
Preferably, dabbing rate >=90% on masonry structure surface, the groove depth of roughened surface is 0.5 ~ 1.0cm, and the spacing of dabbing trace is 2.5 ~ 3.5cm.
Preferably, steel nail is uniformly distributed on roughened surface, its distribution density>=6/m
2.
Preferably, steel nail exposes the length >=2cm of roughened surface.
Preferably, spot welding is welded as between steel nail and reinforced mesh.
Preferably, the spacing of reinforced mesh and roughened surface is 0.9 ~ 1.2cm.
Preferably, the thickness >=3cm of steel concrete transition zone.
Preferably, the bandwidth of steel band is 5 ~ 6cm, tape thickness is 2 ~ 3mm.
Preferably, the preservative treatment of steel strip surface is in steel strip surface rendering concrete slurry, or after steel strip surface pastes peastone rendering concrete slurry again.
Preferably, after the steel band and bonding site, steel concrete transition zone surface that are coated with cementing agent are pasted, check whether have hollowing between the two, if having, then need to re-start stickup.
Relative to the beneficial effect of prior art be:
1, by adding the method for steel concrete transition zone on masonry structure surface, effectively masonry very little for intensity and the higher steel of intensity are connected into an entirety, increase the adhesion stress between masonry and steel, compared with traditional strengthening by epoxy-steel plate structure, bulk strength enlarges markedly.
2, construction method is practical, simple, safe and reliable.
Accompanying drawing explanation
Fig. 1 is a kind of basic procedure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but embodiments of the invention are not limited thereto.
See Fig. 1, the construction method in the present embodiment is as follows:
Step 1, after first being removed by the weathered layer on masonry structure surface, will expose the surperficial dabbing of masonry structure of fresh, obtain the roughened surface of masonry structure; Wherein, the dabbing rate on masonry structure surface is 90%, and the groove depth of roughened surface is 0.8 (can be 0.5 ~ 1.0) cm, and the spacing of dabbing trace is 3 (can be 2.5 ~ 3.5) cm.
Use ail gun to squeeze into steel nail again in the mortar joint place of roughened surface; Wherein, steel nail is uniformly distributed on roughened surface, and its distribution density is 8/m
2, the length that steel nail exposes roughened surface is 2.5cm.
Step 2, follows closely after the steel nail had hangs reinforced mesh prior to mortar joint place, use spot welder steel nail and reinforced mesh to be welded together; Wherein, the spacing of reinforced mesh and roughened surface is 1 (can be 0.9 ~ 1.2) cm.
Again to sprayed mortar on reinforced mesh; Wherein, the thickness of steel concrete transition zone is 3cm, obtains the steel concrete transition zone be overlying on masonry structure.
The detailed process of sprayed mortar is:
(1) concrete preparation
Concrete adopts ordinary Portland cement, and grading of aggregate is good, the coarse aggregate 20%, maximum particle diameter 10mm of more than 5mm; Concrete mix is: cement: sand: stone=1: 2: 2; By design proportioning, cement and aggregate are sent into blender, artificial spice, adopts damp spice, and cement, sand and the stone clear end also turns three times and makes it mix.
(2) concrete injection
1. boiling water blows in, the adjustment water yield, and remain that blast must not lower than 0.4MPa, hydraulic pressure specific wind pressure height about 0.1MPa, amount of water is controlled with the experience of shooter, water/binder ratio 0.4;
2. spray hand operation shower nozzle, rinse surface from top to bottom;
3. power transmission, opens pulp shooting machine blender, and material loading is whitewashed;
4. again adjust geomantic omen amount according to material loading situation, ensure that spray plane is without dry spot, without trickling, adhesion strength is strong, and resilience material is few;
5. spray hand segmentation to spray by sequence from low to uper part, during injection, shower nozzle is perpendicular to being subject to spray plane;
When 6. spraying, shower nozzle running orbit is twist, by diameter 250mm, and the method evenly slowly movement of a circle pressure semicircle;
(3) maintenance
Sprayed mortar started maintenance of sprinkling water after 2 hours, core detection intensity after 28 days.
Step 3, first polishes to steel concrete transition zone and after dedusting, the surface smear cementing agent of bonding site thereon; Wherein, polish as direct effects on surface is polished, remove the top layer that about 2mm is thick, and make it smooth, dedusting blows away dust for using compressed air, and rinses well with clear water, after bone dry, dips in acetone wipe surfaces with degreasing cotton.
Again the steel band and bonding site, steel concrete transition zone surface that are coated with cementing agent are pasted, after to be bonded dose of solidification, preservative treatment is carried out to steel strip surface; Wherein, the bandwidth of steel band is 5 (can be 5 ~ 6) cm, tape thickness is 3 (can be 2 ~ 3) mm; before cementing agent is smeared to steel band; first bonding plane polished and eliminate rust; again in the surperficial rendering concrete slurry (or after surface mount one deck peastone of steel band again rendering concrete slurry) of steel band to form corrosion protective covering; after the steel band and bonding site, steel concrete transition zone surface that are coated with cementing agent are pasted; check whether have hollowing between the two; if have, then need to re-start stickup.
Obviously, those skilled in the art can carry out various change and modification to the construction method of masonry structure strengthening by epoxy-steel plate of the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a construction method for masonry structure strengthening by epoxy-steel plate, comprises the removing of masonry structure surface weathered layer, and in masonry surface mount steel, it is characterized in that:
Step 1, first will expose the surperficial dabbing of masonry structure of fresh, and obtain the roughened surface of masonry structure, then squeeze into steel nail in the mortar joint place of roughened surface;
Step 2, is first welded in mortar joint place and follows closely on the steel nail that has, then to sprayed mortar on reinforced mesh, obtain the steel concrete transition zone be overlying on masonry structure by reinforced mesh;
Step 3, first steel concrete transition zone to be polished and after dedusting, the surface smear cementing agent of bonding site thereon, then the steel band and bonding site, steel concrete transition zone surface that are coated with cementing agent are pasted, after to be bonded dose of solidification, preservative treatment is carried out to steel strip surface.
2. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that dabbing rate >=90% on masonry structure surface, and the groove depth of roughened surface is 0.5 ~ 1.0cm, and the spacing of dabbing trace is 2.5 ~ 3.5cm.
3. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that steel nail is uniformly distributed on roughened surface, its distribution density>=6/m
2.
4. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that steel nail exposes the length >=2cm of roughened surface.
5. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that being welded as spot welding between steel nail and reinforced mesh.
6. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that the spacing of reinforced mesh and roughened surface is 0.9 ~ 1.2cm.
7. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that the thickness >=3cm of steel concrete transition zone.
8. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, is characterized in that the bandwidth of steel band is 5 ~ 6cm, tape thickness is 2 ~ 3mm.
9. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, the preservative treatment that it is characterized in that steel strip surface in steel strip surface rendering concrete slurry, or after steel strip surface pastes peastone rendering concrete slurry again.
10. the construction method of masonry structure strengthening by epoxy-steel plate according to claim 1, it is characterized in that being coated with after the steel band of cementing agent and bonding site, steel concrete transition zone surface paste, check whether have hollowing between the two, if having, then need to re-start stickup.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801519A (en) * | 2017-02-06 | 2017-06-06 | 杨红旵 | A kind of reinforcement means for not reducing house usable floor area |
| CN107288364A (en) * | 2017-07-21 | 2017-10-24 | 北京城建远东建设投资集团有限公司 | A kind of gunite concrete strengthens the construction method of processing with brick wall binder course |
| CN108518080A (en) * | 2018-05-04 | 2018-09-11 | 张美姣 | A kind of efficient construction equipment of steel-bonded reinforcement building |
| CN109702122A (en) * | 2019-03-01 | 2019-05-03 | 江阴市邦泰金属制品有限公司 | A kind of manufacturing method of high intensity railway steel mesh |
| CN110905099A (en) * | 2019-11-28 | 2020-03-24 | 江苏杞林生态环境建设有限公司 | Masonry method of antique building wall |
| CN116290881A (en) * | 2023-03-14 | 2023-06-23 | 广州市机电安装有限公司 | Construction method for vertical surface mortar after reinforcing structure by steel cladding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106801519A (en) * | 2017-02-06 | 2017-06-06 | 杨红旵 | A kind of reinforcement means for not reducing house usable floor area |
| CN107288364A (en) * | 2017-07-21 | 2017-10-24 | 北京城建远东建设投资集团有限公司 | A kind of gunite concrete strengthens the construction method of processing with brick wall binder course |
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| CN108518080B (en) * | 2018-05-04 | 2020-05-22 | 山西多特建筑工程技术有限公司 | High-efficient construction equipment of viscous steel reinforced building |
| CN109702122A (en) * | 2019-03-01 | 2019-05-03 | 江阴市邦泰金属制品有限公司 | A kind of manufacturing method of high intensity railway steel mesh |
| CN109702122B (en) * | 2019-03-01 | 2020-04-10 | 江阴市邦泰金属制品有限公司 | Manufacturing method of high-strength railway reinforcing mesh |
| CN110905099A (en) * | 2019-11-28 | 2020-03-24 | 江苏杞林生态环境建设有限公司 | Masonry method of antique building wall |
| CN116290881A (en) * | 2023-03-14 | 2023-06-23 | 广州市机电安装有限公司 | Construction method for vertical surface mortar after reinforcing structure by steel cladding |
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| CN104746891B (en) | 2017-02-22 |
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Effective date of registration: 20180110 Address after: Shanghai road in Baohe District of Hefei city of Anhui Province, No. 8 230051 Patentee after: Anhui Guoxin Construction Group Co., Ltd. Address before: Shenyang Lu, Baohe Industrial District of Hefei City, Anhui Province, No. 20 230051 Patentee before: ANHUI GOLDENLAND ARCHITECTURAL DESIGN LTD. |