CN110284726A - The reinforced construction method of concrete frame trestle - Google Patents
The reinforced construction method of concrete frame trestle Download PDFInfo
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- CN110284726A CN110284726A CN201910575588.6A CN201910575588A CN110284726A CN 110284726 A CN110284726 A CN 110284726A CN 201910575588 A CN201910575588 A CN 201910575588A CN 110284726 A CN110284726 A CN 110284726A
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- concrete
- reinforced
- bar
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- bar planting
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a kind of reinforced construction methods of concrete frame trestle; cut the protective layer of the frame column that need to be reinforced and frame column surrounding inner floor; concrete defect position is cleared up to solid base and fracture is handled, retain reinforcing bar and is derusted and is cleaned to steel bar corrosion;Progress dabbing in interface is poured to new-old concrete, moistens and connect slurry or the processing of brush configuration interface glue, removes the greasy dirt, laitance and dust on surface;Bar planting is carried out to frame column and internal floor, field test is first carried out, just carries out large area bar planting after qualified, reinforced steel and closed stirrup, supporting module after the completion of binding are bound after bar planting;Mixing and grouting material is poured, sprinkle water and infiltrate to concrete surface before pouring, guarantees that gas can be escaped freely and vibration compacting, take maintenance measure and form removal after pouring in casting process.This method increases the intensity, rigidity and stability of cylinder, increases the bearing capacity and durability of internal floor, easy to operate, cost is low.
Description
Technical field
The invention belongs to housing construction fields, and in particular to a kind of reinforced construction method of concrete frame trestle.
Background technique
In reinforced concrete structures, concrete frame trestle plays bearing load and transmitting as main primary structure member
The important function of load, is the important component for influencing building collapse and destroying, and safety directly determines entire concrete
The security performance of structure.
Since design specification grade improves, construction quality is poor, active time increases, structure overloads, fatigue load and erosion
Steel bar corrosion causes Deterioration of Structural Performance etc. artificial or the influence of natural calamity factor under environment, cause building structure in middle shake and
The destruction that easily collapses of big earthquake centre causes people's property safety to lose.Therefore, due to safety concerns, extend armored concrete knot
The service life of structure, especially carrying out repairing and reinforcement to concrete frame trestle becomes urgent problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of reinforced construction method of concrete frame trestle, this method increases frame column cross
Sectional area increases the intensity, rigidity and stability of cylinder, extends the structure service life of concrete frame trestle, increases
The bearing capacity and durability of internal floor, easy to operate, cost is low.
The technical scheme adopted by the invention is that:
A kind of reinforced construction method of concrete frame trestle is reinforced by increasing frame column cross-sectional area, including step
It is rapid:
S1, the protective layer for cutting the frame column that need to be reinforced and frame column surrounding inner floor are clear by concrete defect position
Reason is to solid base and fracture is handled, and retains reinforcing bar and is derusted and cleaned to steel bar corrosion;
S2, progress dabbing in interface is poured to new-old concrete, moistens and connect slurry or the processing of brush configuration interface glue, remove surface
Greasy dirt, laitance and dust;
S3, bar planting is carried out to frame column and internal floor, first carries out field test, just carries out large area bar planting after qualified,
Reinforced steel and closed stirrup, supporting module after the completion of binding are bound after bar planting;
S4, mixing and grouting material is poured, sprinkle water and infiltrate to concrete surface before pouring, guarantees that gas can be from casting process
By evolution and vibration compacting, maintenance measure and form removal are taken after pouring.
In S1, if the frame column and frame column surrounding inner floor that need to reinforce need to remove before cutting there are component,
It then must assure that reinforcement completion and after strenthening member reaches design strength, just can be carried out dismounting work.
Further, the beam and floor that need to be removed must first take reliable support top, it is ensured that construction personnel and structural system peace
Quan Hou, then the cutting of static(al) round is taken to be removed.
In S2, interface is poured to new-old concrete and increases plantation shear pin.
In S3, when the reinforced steel of bar planting and longitudinal tensile overlap joint, lap joint mutually staggers and lap of splice Ll
=ζ Ld, ζ are the reinforced steel lap joint area percentage coefficient of longitudinal tensile, and Ld is plant anchor depth.
Further, when the reinforced steel lap joint area percentage of longitudinal tensile≤25%, ζ is equal to 1.2, Zong Xiangshou
When the reinforced steel lap joint area percentage of drawing is equal to 50%, ζ is equal to 1.4, the reinforced steel lap joint of longitudinal tensile
When area percentage is equal to 100%, ζ is equal to 1.6, for beam class component, the reinforced steel lap joint area hundred of longitudinal tensile
Rate is divided to be no more than 50%.
In S3, when bar planting, first postwelding is answered to plant, when have any problem must after weldering when, solder joint from substrate surface be greater than 15d and
Should be using the root of the wet towel multilayer package bar planting exposed parts of ice water dipping, d is bar diameter;When plantation, first by design
It is required that hole location, aperture, hole gun drilling, with hair dryer and brush cleaning duct until hole inner wall is water stain without floating dust, then
Syringe is protruded into hole, syringe is slowly extracted on marginal not anchoring adhesive side, and the reinforcing bar single direction rotation of straight derusting is slowly inserted into
In duct, it is attached to anchoring adhesive uniformly in rebar surface and thread gaps, reinforcing bar derusts length greater than bar planting length.
In S3, closed stirrup is connected by two U-shaped reinforcement weldings and is formed, and weld length 10d, d are bar diameter, or by
4 L shape reinforcement weldings connect to be formed.
In S3, the minimal protective cover thickness for the reinforcing area that template surrounds should be greater than Ld+2 times of plant anchor depth and drill
Diameter D.
In S4, need to make concrete test block before mixing grouting material, when the strength grade of concrete test block meets the requirements,
Ability mixing grouting material, strength grade of concrete are determined by cubic compressive strength standard value.
The beneficial effects of the present invention are:
This method, which does not need to cut cylinder, does over again, and easy to operate, on-site wet operation amount is few, has saved the duration, cost at
This is low, increases frame column cross-sectional area, extends the structure service life of concrete frame trestle;Cut protective layer, dabbing and
After bar planting, reinforcing area concreting is carried out using the method for grouting, protective layer is cut and ensures footing and former frame
The armored concrete of column is connected directly, and dabbing processing ensure that new-old concrete pours interface hollow state, is conducive to reliably connect
It connects, bar planting ensure that the globality of new-old concrete, and footing and former frame column are all armored concrete, and the two can be preferable
It combines together, increases the intensity, rigidity and stability of cylinder, while reinforced steel and closed stirrup are to internal floor and frame
Column carries out integral reinforcing, improves column to the endurance and ductility of internal floor, increase internal floor bearing capacity and
Durability.
Detailed description of the invention
Fig. 1 is the sectional view of a construction node in the embodiment of the present invention.
In figure: 1- strength cement-based grouting material;2- reinforced steel;Floor inside 3-;4- frame column;5- closed stirrup.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
A kind of reinforced construction method of concrete frame trestle is reinforced by increasing by 4 cross-sectional area of frame column, including step
It is rapid:
S1, protective layer (the protective layer generally painting for cutting 4 surrounding inner floor 3 of the frame column 4 that need to be reinforced and frame column
Layer and bed course include concrete water chestnut), by (the loose, damaged) cleaning in concrete defect position to solid base and fracture into
Row processing retains reinforcing bar and is derusted and cleaned to steel bar corrosion.
Specifically, if the frame column 4 and 4 surrounding inner floor of frame column that need to reinforce need to tear open before cutting there are component
It removes, then must assure that reinforcement completion and after strenthening member reaches design strength, just can be carried out dismounting work;The beam that need to be removed
And floor must first take reliable support top, it is ensured that after construction personnel and structural system safety, then the cutting of static(al) round be taken to carry out
It removes.
S2, progress dabbing in interface is poured to new-old concrete, moistens and connect slurry or the processing of brush configuration interface glue, remove surface
Greasy dirt, laitance and dust.
Interface can also be poured in new-old concrete increase plantation shear pin (use 8@, 400 plum blossom of non-specified otherwise
Shape, length L=200mm are implanted into 100mm in component).
S3, bar planting is carried out to frame column 4 and internal floor 3, and (anchoring adhesive meets welding, anti-seismic performance etc. and requires and provide phase
Close test report), field test is first carried out, just carries out large area bar planting after qualified, reinforced steel 2 and closing ring are bound after bar planting
Muscle 5, supporting module after the completion of binding.
Specifically, when the reinforced steel 2 of bar planting and longitudinal tensile overlaps, lap joint mutually staggers and lap of splice Ll
=ζ Ld, ζ are the 2 lap joint area percentage coefficient of reinforced steel of longitudinal tensile, and Ld is plant anchor depth.Longitudinal tensile
2 lap joint area percentage of reinforced steel≤25% when, ζ be equal to 1.2, the 2 lap joint face of reinforced steel of longitudinal tensile
When product percentage is equal to 50%, ζ is equal to 1.4, when the 2 lap joint area percentage of reinforced steel of longitudinal tensile is equal to 100%,
ζ is equal to 1.6, and for beam class component, the 2 lap joint area percentage of reinforced steel of longitudinal tensile is no more than 50%.
Specifically, when bar planting, first postwelding is answered to plant, when have any problem must after weldering when, solder joint from substrate surface be greater than 15d and
Should be using the root of the wet towel multilayer package bar planting exposed parts of ice water dipping, d is bar diameter;When plantation, first by design
It is required that hole location, aperture, hole gun drilling, with hair dryer and brush cleaning duct until hole inner wall is water stain without floating dust, then
Syringe is protruded into hole, syringe is slowly extracted on marginal not anchoring adhesive side, and the reinforcing bar single direction rotation of straight derusting is slowly inserted into
In duct, it is attached to anchoring adhesive uniformly in rebar surface and thread gaps, reinforcing bar derusts length greater than bar planting length.
Specifically, closed stirrup 5 is connected by two U-shaped reinforcement weldings and is formed, and weld length 10d, d are bar diameter, or
It is connected and is formed by 4 L shape reinforcement weldings.
Specifically, the minimal protective cover thickness for the reinforcing area that template surrounds should be greater than Ld+2 times of plant anchor depth and drill
Diameter D.
S4, mixing and grouting material 1 is poured, sprinkle water and infiltrate to concrete surface before pouring, guarantees gas energy in casting process
It freely escapes and vibration compacting, maintenance measure and form removal is taken after pouring.
Specifically, need to make concrete test block before mixing grouting material 1, the strength grade of concrete test block meets the requirements
When, ability mixing grouting material 1, strength grade of concrete is determined by cubic compressive strength standard value and (is made by standard method, feeding
The side length of shield is the cube specimen of 150mm, has 95% to protect with what standard test method measured in 28d or design code age
The compression strength value of card rate).
This method, which does not need to cut cylinder, does over again, and easy to operate, on-site wet operation amount is few, has saved the duration, cost at
This is low, increases 4 cross-sectional area of frame column, extends the structure service life of concrete frame trestle;Cut protective layer, dabbing and
After bar planting, reinforcing area concreting is carried out using the method for grouting, protective layer is cut and ensures footing and former frame
The armored concrete of column 4 is connected directly, and dabbing processing ensure that new-old concrete pours interface hollow state, is conducive to reliably connect
It connects, bar planting ensure that the globality of new-old concrete, and footing and former frame column are all armored concrete, and the two can be preferable
It combines together, increases the intensity, rigidity and stability of cylinder, while 5 pairs of 3 Hes of internal floor of reinforced steel 2 and closed stirrup
Frame column 4 carries out integral reinforcing, improves column to the endurance and ductility of internal floor 3, increases holding for internal floor 3
Carry power and durability.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of reinforced construction method of concrete frame trestle, it is characterised in that: added by increasing frame column cross-sectional area
Gu including step,
S1, the protective layer for cutting the frame column that need to be reinforced and frame column surrounding inner floor, by concrete defect position clear up to
Simultaneously fracture is handled solid base, is retained reinforcing bar and is simultaneously derusted and cleaned to steel bar corrosion;
S2, progress dabbing in interface is poured to new-old concrete, moistens and connect slurry or the processing of brush configuration interface glue, remove the oil on surface
Dirty, laitance and dust;
S3, bar planting is carried out to frame column and internal floor, first carries out field test, just carries out large area bar planting, bar planting after qualified
Reinforced steel and closed stirrup, supporting module after the completion of binding are bound afterwards;
S4, mixing and grouting material is poured, sprinkle water and infiltrate to concrete surface before pouring, guarantees that gas can freely escape in casting process
Out and vibration compacting, maintenance measure and form removal are taken after pouring.
2. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S1, if needing to reinforce
Frame column and frame column surrounding inner floor need to remove there are component before cutting, then must assure that reinforcement complete and
After strenthening member reaches design strength, dismounting work just can be carried out.
3. the reinforced construction method of concrete frame trestle as claimed in claim 2, it is characterised in that: the beam and floor that need to be removed
Reliable support top must first be taken, it is ensured that after construction personnel and structural system safety, then the cutting of static(al) round is taken to be removed.
4. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S2, to new and old mixed
Solidifying soil pours interface and increases plantation shear pin.
5. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S3, when bar planting with
When the reinforced steel overlap joint of longitudinal tensile, lap joint is mutually staggered and the lap of splice Ll=ζ Ld, ζ are the reinforcing of longitudinal tensile
Bar splicing connector area percentage coefficient, Ld are plant anchor depth.
6. the reinforced construction method of concrete frame trestle as claimed in claim 5, it is characterised in that: the reinforcing steel of longitudinal tensile
When muscle lap joint area percentage≤25%, ζ is equal to 1.2, reinforced steel lap joint area percentage of longitudinal tensile etc.
When 50%, ζ is equal to 1.4, when the reinforced steel lap joint area percentage of longitudinal tensile is equal to 100%, and ζ is right equal to 1.6
It is no more than 50% in the reinforced steel lap joint area percentage of beam class component, longitudinal tensile.
7. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S3, when bar planting, answer
First postwelding plantation, when having any problem rear must weld, solder joint is greater than 15d from substrate surface and the wet towel that should be impregnated using ice water is more
The root of layer package bar planting exposed parts, d is bar diameter;When plantation, hole location, the aperture, hole gun drilling of design requirement are first pressed,
With hair dryer and brush cleaning duct until hole inner wall is water stain without floating dust, syringe, marginal not bar planting are then protruded into hole
Syringe is slowly extracted on glue side, and the reinforcing bar single direction rotation of straight derusting is slowly inserted into duct, is attached to anchoring adhesive uniformly
In rebar surface and thread gaps, reinforcing bar derusts length greater than bar planting length.
8. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S3, closed stirrup
It is connected and is formed by two U-shaped reinforcement weldings, weld length 10d, d are bar diameter, or are connected and formed by 4 L shape reinforcement weldings.
9. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S3, template is surrounded
The minimal protective cover thickness of reinforcing area should be greater than Ld+2 times of bore diameter D of plant anchor depth.
10. the reinforced construction method of concrete frame trestle as described in claim 1, it is characterised in that: in S4, mixing grouting
It needs to make concrete test block before material, when the strength grade of concrete test block meets the requirements, ability mixing grouting material, strong concrete
Grade is spent to determine by cubic compressive strength standard value.
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Cited By (5)
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CN110905227A (en) * | 2019-11-21 | 2020-03-24 | 南宁学院 | Method for reinforcing concrete column |
CN112359889A (en) * | 2020-10-19 | 2021-02-12 | 中国建筑第二工程局有限公司 | Foundation slab reinforcement reverse construction method |
CN113123629A (en) * | 2021-03-30 | 2021-07-16 | 中国建筑第八工程局有限公司 | Prestressed reinforcement construction method for increasing section of existing structure post-column beam |
CN114370160A (en) * | 2021-12-30 | 2022-04-19 | 珠海华发人居生活研究院有限公司 | Vertical member porous linkage grouting reinforcement method |
CN114370173A (en) * | 2022-01-07 | 2022-04-19 | 宝武集团鄂城钢铁有限公司 | Reinforcement treatment method for construction defects of high-level water tower |
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CN107859352A (en) * | 2017-11-23 | 2018-03-30 | 中铁建设集团南方工程有限公司 | Consolidation process construction at skyscraper different strength concrete bean column node |
CN109555329A (en) * | 2018-11-22 | 2019-04-02 | 杭州锦晨建筑特种工程有限公司 | Reinforcing construction process is transformed in building |
CN109680979A (en) * | 2019-02-25 | 2019-04-26 | 中国建筑第八工程局有限公司 | The reinforced construction method of existing structure |
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CN203403696U (en) * | 2013-08-08 | 2014-01-22 | 黄智辉 | Brick-concrete structure newly-added reinforced concrete beam at position of original brickwork wall to be parallel to slab rib |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110905227A (en) * | 2019-11-21 | 2020-03-24 | 南宁学院 | Method for reinforcing concrete column |
CN112359889A (en) * | 2020-10-19 | 2021-02-12 | 中国建筑第二工程局有限公司 | Foundation slab reinforcement reverse construction method |
CN112359889B (en) * | 2020-10-19 | 2022-01-28 | 中国建筑第二工程局有限公司 | Foundation slab reinforcement reverse construction method |
CN113123629A (en) * | 2021-03-30 | 2021-07-16 | 中国建筑第八工程局有限公司 | Prestressed reinforcement construction method for increasing section of existing structure post-column beam |
CN114370160A (en) * | 2021-12-30 | 2022-04-19 | 珠海华发人居生活研究院有限公司 | Vertical member porous linkage grouting reinforcement method |
CN114370173A (en) * | 2022-01-07 | 2022-04-19 | 宝武集团鄂城钢铁有限公司 | Reinforcement treatment method for construction defects of high-level water tower |
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Application publication date: 20190927 |