CN104847130A - Reinforcing structure of existing structural beam and construction method thereof - Google Patents
Reinforcing structure of existing structural beam and construction method thereof Download PDFInfo
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- CN104847130A CN104847130A CN201510254913.0A CN201510254913A CN104847130A CN 104847130 A CN104847130 A CN 104847130A CN 201510254913 A CN201510254913 A CN 201510254913A CN 104847130 A CN104847130 A CN 104847130A
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Abstract
The invention discloses a reinforcing structure of an existing structural beam. The reinforcing structure of the existing structural beam comprises the structural beam. Two ends of the structural beam are respectively connected with a structure column, an outer wrapping steel sleeve is arranged on the structural beam, multiple reinforcing ribs are arranged between the bottom of the structural beam and the outer wrapping steel sleeve, and the end portions of the reinforcing ribs are embedded in the structure columns. Two sides of the outer wrapping steel sleeve are provided with grouting tunnels, and angle steels are symmetrically arranged on the two sides of the outer wrapping steel sleeve and the beam plate junction. The vertical portions of the angle steels are connected with the structural beam through anchor bolts, and the horizontal portions are provided with high-strength bolts which penetrate through the beam plate. A connecting hoop plate is arranged between the tops of every two high-strength bolts which are located on the same plane, and the position, corresponds to the structural beam, between each connecting plate and the beam plate is provided with a hogging moment steel plate. Due to the fact that the existing structural beam increases the section and is provided with the outer wrapping steel sleeve, the anti-bending and anti-shearing capability of the existing structural beam is greatly improved, the bearing capability for the integrated extra-large load of the applied local portion is satisfied, and the hidden danger after completion and the economic loss due to removing and reconstruction are effectively avoided.
Description
Technical field
The invention belongs to Structures Reinforced Technique field, be specifically related to a kind of ruggedized construction and construction method thereof of existing structure beam.
Background technology
Reinforced concrete structure formula uses maximum form of structure in construction work.But in the modernization restructuring of building, conventional method is rebuild after removing, although can meet the requirements at the higher level of building structure to load, the financial cost of this method is high, and the duration is longer, also quite large on the impact of environment.
Along with the development of Structures Reinforced Technique, agenda has also been put on to the strengthening reconstruction of existing building structure, but with regard to currently used reinforcement means, after its construction the bending resistance that can reach and shear resistance limited, the requirement that concentration of local bears super large load cannot be met.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of rational in infrastructure, and easy construction is quick, the ruggedized construction of the existing structure beam that bearing capacity significantly improves and construction method thereof.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of ruggedized construction of existing structure beam, comprise structural beams, the two ends of structural beams are connected to structural column, Covered with Angles cover is provided with outside structural beams, the soffit of the top of outsourcing steel bushing and the beam slab at structural beams place is fitted, end and structural column are fitted, many rinforcement bars are provided with between the bottom of structural beams and outsourcing steel bushing, in the end implant infrastructure post of rinforcement bar, the both sides of outsourcing steel bushing are provided with grouting tunnel, in Covered with Angles cover, slurry is poured into by this grouting tunnel, outsourcing steel bushing both sides and beam slab junction are arranged with multiple angle steel, the vertical component effect of angle steel is connected with structural beams by crab-bolt, the horizontal part of angle steel is provided with the high-strength bolt running through beam slab, and connecting hoop plate is provided with between the top of two high-strength bolts of same level, between connecting hoop plate and beam slab, the position of counter structure beam is provided with hogging moment steel plate.
Described slurry is CGM slurry.
Described rinforcement bar is at least 5.
Described rinforcement bar is 11, point two rows, and lower row is spaced apart 9, and upper row two is corresponding lower two settings of arranging end respectively.
Spacing between adjacent two pieces of described junction steel plates controls at 380-420mm.
The construction method of described ruggedized construction, comprises the following steps:
(1) dabbing process is done on the surface of structural beams, beam slab and structural column;
(2) structural column avoids main reinforce position boring, injects tubulose structure glue, by rinforcement bar implant holes, and seal with epoxy mortar behind clear hole;
(3) outsourcing steel bushing is pasted in advance outward in structural beams, the soffit of the top of outsourcing steel bushing and the beam slab at structural beams place is fitted, end and structural column are fitted, and reserved grouting tunnel, outsourcing steel bushing welds angle steel with the junction of beam slab, angle steel is in the distribution of Covered with Angles cover bilateral symmetry, crab-bolt is squeezed into the embedded hole of structural beams from the vertical component effect of angle steel, high-strength bolt is squeezed into the embedded hole running through beam slab from the horizontal part of angle steel;
(4) fit after the position of beam slab upper surface counter structure beam and the soffit smearing structure glue of hogging moment steel plate, smearing thickness controls at 1-3mm;
(5) with fastening nuts connecting hoop plate between the top of two high-strength bolts of same level, after stable, rear filling epoxy resin is carried out;
(6) the side formwork of outsourcing steel bushing, injects in template by CGM slurry good for mixing from reserved grouting tunnel, levelling shaping;
(7) angle steel does joint seal process, and outsourcing steel bushing and hogging moment steel plate do anticorrosion, fire prevention process.
Compared with prior art, advantage of the present invention is: the present invention is rational in infrastructure, easy construction is quick, duration is shorter, by adopting enlarging section to add the mode of peripheral hardware outsourcing steel bushing to existing structure beam, increase substantially bending resistance and the shear resistance of existing structure beam, met the supporting capacity applying concentration of local super large load, effectively prevent and be completed rear generation hidden danger and remove the economic loss of rebuilding and bringing.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Wherein, 1, structural beams, 2, rinforcement bar, 3, outsourcing steel bushing, 4, CGM slurry, 5, grouting tunnel, 6, crab-bolt, 7, angle steel, 8, high-strength bolt, 9, connecting hoop plate, 10, hogging moment steel plate, 11, beam slab, 12, structural column.
Detailed description of the invention:
As shown in Figure 1, a kind of ruggedized construction of existing structure beam, comprise structural beams 1, the two ends of structural beams 1 are connected to structural column 12, Covered with Angles cover 3 is provided with outside structural beams 1, the soffit of the top of outsourcing steel bushing 3 and the beam slab 11 at structural beams 1 place is fitted, end and structural column 12 are fitted, at least 5 rinforcement bars 2 are provided with between the bottom of structural beams 1 and outsourcing steel bushing 3, in the end implant infrastructure post 12 of rinforcement bar 2, the both sides of outsourcing steel bushing 3 are provided with grouting tunnel 5, in Covered with Angles cover 3, CGM slurry 4 is poured into by this grouting tunnel 5, outsourcing steel bushing 3 both sides and beam slab 11 junction are arranged with multiple angle steel 7, the vertical component effect of angle steel 7 is connected with structural beams 1 by crab-bolt 6, the horizontal part of angle steel 7 is provided with the high-strength bolt 8 running through beam slab 11, and connecting hoop plate 9 is provided with between the top of two high-strength bolts 8 of same level, between connecting hoop plate 9 and beam slab 11, the position of counter structure beam 1 is provided with hogging moment steel plate 10.
So that the sectional area 300*700 of existing structure beam 1 is increased to 500*1000, the construction method of its ruggedized construction, comprises the following steps:
(1) the surface awl hacking of structural beams 1, beam slab 11 and structural column 12 is rough, then rinses well with water, to increase surperficial adhesion stress;
(2) detect the main reinforce position of existing structure post 12 with reinforcing bar survey meter, reserve topping, then avoid the implanted region that main reinforce position designs 25 rinforcement bars 2, in the present embodiment, rinforcement bar 2 is 11, point two rows, and lower row is spaced apart 9, upper row two is corresponding lower two settings of arranging end respectively, the length of rinforcement bar 2 is the clear distance+anchorage length * 2 between structural column 12, and in the present embodiment, the clear distance between structural column is 8000mm, anchorage length is 20d, i.e. 500mm; In implanted region boring, hole depth is 500mm, and aperture is 27mm; With oil-free compressed air, floating dust in hole is blown after pore-forming, and with staple wiping hole wall twice, then dip in acetone wiping twice with degreasing staple, finally with clean staple, aperture is closed, to prevent in dust or grains of sand access aperture; Rust cleaning polishing process is carried out to the implant part of rinforcement bar 2, by in prefabricated tubular structure glue injection hole after taking-up staple, then slow in rinforcement bar 2 rotary insertion hand-hole, structure glue is overflowed from aperture, discharge hole air, seal with epoxy mortar after structure glue solidification;
(3) outside structural beams 1, pre-subsides thickness is the outsourcing steel bushing 3 of 10mm, the soffit of the top of outsourcing steel bushing 3 and the beam slab 11 at structural beams 1 place is fitted, end and structural column 12 are fitted, and reserved grouting tunnel 5, at a distance of 100mm between the side of outsourcing steel bushing 3 and structural beams 1, at a distance of 300mm between bottom and structural beams 1, outsourcing steel bushing 3 welds L75*5 equal leg angle 7 with the junction of beam slab 11, angle steel 7 overlaps 3 bilateral symmetry distributions at Covered with Angles, M10 crab-bolt 6 is squeezed into the embedded hole of structural beams 1 from the vertical component effect of angle steel 7, M16 high-strength bolt 8 is squeezed into the embedded hole running through beam slab 11 from the horizontal part of angle steel 7,
(4) fit after the position of beam slab 11 upper surface counter structure beam 1 and the soffit smearing structure glue of hogging moment steel plate 10, smearing thickness controls at 1-3mm, and the width of hogging moment steel plate 10 is 300mm, and thickness is 5mm, arranges along structural beams 1 whole audience;
(5) with fastening nuts connecting hoop plate 9 between the top of two high-strength bolts 8 of same level, the length of connecting hoop plate 9 is 650mm, and width is 100mm, and thickness is 5mm, spacing between adjacent two blocks of connecting hoop plates 9 controls at 380-420mm, carries out rear filling epoxy resin after stable;
(6) the side formwork of outsourcing steel bushing 3, injects in template by CGM slurry 4 good for mixing from reserved grouting tunnel 5, levelling shaping rear form removal; Before perfusion 4-6 hour basal plane water is fully wetting, the open fire before grouting material on removing basal plane, discharges for the ease of air in filling process, should pour into from the side of outsourcing steel bushing 3, not allow to pour into from several, after perfusion starts simultaneously, must carry out continuously, until poured into; When stopping construction in filling process, scrape tooth mouth at CGM slurry 4 crops for rotation serrated knife, to guarantee that construction joint place combines firmly;
(7) each angle steel 7 does joint seal process by epoxy mortar, and brushing one deck interfacial agents before joint seal, as epoxy slurry, places injected rubber hose and escape pipe every about 1m, guarantee epoxy mortar compacting, No leakage; After outsourcing steel bushing 3 and hogging moment steel plate 10 eliminate rust respectively, even brushing rustproof paint twice, and require brushing fireproof paint according to fire-protection rating.
In the above-described embodiments, the mode adopting enlarging section to add outsourcing shaped steel is reinforced existing structure beam 1, and compared with dismounting reconstruction, bending resistance and shear resistance increase substantially, and the duration can shorten about 20 days, and construction costs can reduce by more than 950,000; And compared with producing hidden danger afterwards with completion, do not have macroscopic view comparative.
Claims (6)
1. the ruggedized construction of an existing structure beam, comprise structural beams, the two ends of described structural beams are connected to structural column, it is characterized in that: outside described structural beams, be provided with Covered with Angles cover, the soffit of the top of described outsourcing steel bushing and the beam slab at structural beams place is fitted, end and structural column are fitted, many rinforcement bars are provided with between the bottom of described structural beams and outsourcing steel bushing, in the end implant infrastructure post of described rinforcement bar, the both sides of described outsourcing steel bushing are provided with grouting tunnel, in Covered with Angles cover, slurry is poured into by this grouting tunnel, described outsourcing steel bushing both sides and beam slab junction are arranged with multiple angle steel, the vertical component effect of described angle steel is connected with structural beams by crab-bolt, the horizontal part of described angle steel is provided with the high-strength bolt running through beam slab, and connecting hoop plate is provided with between the top of two high-strength bolts of same level, between described connecting hoop plate and beam slab, the position of counter structure beam is provided with hogging moment steel plate.
2. the ruggedized construction of a kind of existing structure beam according to claim 1, is characterized in that: described slurry is CGM slurry.
3. the ruggedized construction of a kind of existing structure beam according to claim 1, is characterized in that: described rinforcement bar is at least 5.
4. the ruggedized construction of a kind of existing structure beam according to claim 3, is characterized in that: described rinforcement bar is 11, point two rows, and lower row is spaced apart 9, and upper row two is corresponding lower two settings of arranging end respectively.
5. the ruggedized construction of a kind of existing structure beam according to claim 1, is characterized in that: the spacing between adjacent two pieces of described junction steel plates controls at 380-420mm.
6. the construction method of ruggedized construction according to any one of claim 1 to 5, is characterized in that: comprise the following steps:
(1) dabbing process is done on the surface of structural beams, beam slab and structural column;
(2) structural column avoids main reinforce position boring, injects tubulose structure glue, by rinforcement bar implant holes, and seal with epoxy mortar behind clear hole;
(3) outsourcing steel bushing is pasted in advance outward in structural beams, the soffit of the top of outsourcing steel bushing and the beam slab at structural beams place is fitted, end and structural column are fitted, and reserved grouting tunnel, outsourcing steel bushing welds angle steel with the junction of beam slab, angle steel is in the distribution of Covered with Angles cover bilateral symmetry, crab-bolt is squeezed into the embedded hole of structural beams from the vertical component effect of angle steel, high-strength bolt is squeezed into the embedded hole running through beam slab from the horizontal part of angle steel;
(4) fit after the position of beam slab upper surface counter structure beam and the soffit smearing structure glue of hogging moment steel plate, smearing thickness controls at 1-3mm;
(5) with fastening nuts connecting hoop plate between the top of two high-strength bolts of same level, after stable, rear filling epoxy resin is carried out;
(6) the side formwork of outsourcing steel bushing, injects in template by CGM slurry good for mixing from reserved grouting tunnel, levelling shaping;
(7) angle steel does joint seal process, and outsourcing steel bushing and hogging moment steel plate do anticorrosion, fire prevention process.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604342A (en) * | 2016-01-07 | 2016-05-25 | 扬州工业职业技术学院 | Comprehensive reinforcing method for T-shaped beam of reinforced concrete frame |
| CN107217865A (en) * | 2017-06-20 | 2017-09-29 | 中冶建工集团有限公司 | A kind of increasing reinforced construction method of the flat beam section of main body frame |
| 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 |
| CN108442950A (en) * | 2018-03-09 | 2018-08-24 | 中国矿业大学(北京) | A kind of " U-shaped steel holder " Dam Foundation Strengthened in Situ method |
| CN108590224A (en) * | 2018-05-31 | 2018-09-28 | 内蒙古科技大学 | A kind of composite reinforcing method of reinforced beam |
| CN109138485A (en) * | 2018-09-14 | 2019-01-04 | 武大巨成结构股份有限公司 | A kind of concrete column core cushion block and its application method for building jacking increasing layer |
| CN113719151A (en) * | 2021-10-08 | 2021-11-30 | 北京六建集团有限责任公司 | Drilling and grouting construction method without home-entry reinforcement and reconstruction |
| CN114135116A (en) * | 2021-11-03 | 2022-03-04 | 上海建工二建集团有限公司 | Construction method for enlarging and reinforcing cross section of existing structural beam and reinforcing device |
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| CN204782044U (en) * | 2015-05-19 | 2015-11-18 | 江苏南通三建集团有限公司 | Reinforced structure of existing structure roof beam |
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| DD144939A1 (en) * | 1979-07-18 | 1980-11-12 | Wolfgang Philipp | METHOD FOR INCREASING THE WEARING OF STEEL CONCRETE TILES |
| GB8424722D0 (en) * | 1983-10-05 | 1984-11-07 | Humphryes J A | Strengthening preservation and repair of roofs |
| EP0412910A1 (en) * | 1989-08-09 | 1991-02-13 | Societe D'installations Personnalisees Et D'entreprise Generale Sipeg | Reinforcing element for existing wooden beam, its manufacturing method and arrangement, its use and reinforced beam obtained therefrom |
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| CN101672108A (en) * | 2009-09-27 | 2010-03-17 | 东南大学 | Steel plate-brickwork combination stressed building component and production method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604342A (en) * | 2016-01-07 | 2016-05-25 | 扬州工业职业技术学院 | Comprehensive reinforcing method for T-shaped beam of reinforced concrete frame |
| CN107217865A (en) * | 2017-06-20 | 2017-09-29 | 中冶建工集团有限公司 | A kind of increasing reinforced construction method of the flat beam section of main body frame |
| CN107217865B (en) * | 2017-06-20 | 2019-08-30 | 中冶建工集团有限公司 | A kind of increasing reinforced construction method of the flat beam section of main body frame |
| CN108442950A (en) * | 2018-03-09 | 2018-08-24 | 中国矿业大学(北京) | A kind of " U-shaped steel holder " Dam Foundation Strengthened in Situ method |
| 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 |
| CN108590224A (en) * | 2018-05-31 | 2018-09-28 | 内蒙古科技大学 | A kind of composite reinforcing method of reinforced beam |
| CN109138485A (en) * | 2018-09-14 | 2019-01-04 | 武大巨成结构股份有限公司 | A kind of concrete column core cushion block and its application method for building jacking increasing layer |
| CN113719151A (en) * | 2021-10-08 | 2021-11-30 | 北京六建集团有限责任公司 | Drilling and grouting construction method without home-entry reinforcement and reconstruction |
| CN114135116A (en) * | 2021-11-03 | 2022-03-04 | 上海建工二建集团有限公司 | Construction method for enlarging and reinforcing cross section of existing structural beam and reinforcing device |
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| CN104847130B (en) | 2017-04-05 |
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Address after: No. 131, Haiman City, Jiangsu Province, Haimen City, Jiangsu Patentee after: JIANGSU NANTONG SANJIAN CONSTRUCTION GROUP Co.,Ltd. Address before: No. 131, Haiman City, Jiangsu Province, Haimen City, Jiangsu Patentee before: NANTONG NO.3 CONSTRUCTION GROUP Co.,Ltd. |
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