CN105113432B - A kind of maintenance reinforcement method of steel bridge construction - Google Patents
A kind of maintenance reinforcement method of steel bridge construction Download PDFInfo
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- CN105113432B CN105113432B CN201510600683.9A CN201510600683A CN105113432B CN 105113432 B CN105113432 B CN 105113432B CN 201510600683 A CN201510600683 A CN 201510600683A CN 105113432 B CN105113432 B CN 105113432B
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Abstract
The present invention discloses the maintenance reinforcement method of a kind of steel bridge construction, belongs to steel bridge construction field.The method includes the surface of newly-increased component is carried out blasting treatment, and sprayed coating forms the first friction coatings；Existing component being carried out blasting treatment, makes the lower thickness of the dope layer connected on rubbing surface of existing component form the second friction coatings, the thickness of the second friction coatings is 100 ~ 200 m；By bolt, newly-increased component and existing component are connected fixing.The present invention forms, by blasting treatment, the second friction coatings that thickness is 100 ~ 200 m, abutted with the connection rubbing surface of newly-increased component by the second friction coatings, can provide and preferably connect rubbing surface structure, the method need not the upper dope layer connecting rubbing surface is all removed and sprayed coating again existing structure, shorten the engineering time, decrease the waste of abrasive material and the reduction of the pollution to environment of the coating of removing, beneficially production cost and the raising of economic benefit in sandblasting procedures.
Description
Technical field
The present invention relates to steel bridge construction technical field, be specifically related to the maintenance reinforcement method of a kind of steel bridge construction.
Background technology
High strength exploitation has been developed as one of main type of attachment of steel construction, the advantages such as stress performance is good, endurance, anti-seismic performance are good, coupling stiffness is high, easy construction that it has, and is widely used in steel bridge maintenance and reinforcement engineering.
But, the process connecting rubbing surface when being connected newly-increased component with existing component will directly affects the effect of high strength exploitation, generally during steel bridge construction maintenance and reinforcement, use the connection friction face-face structure consistent with new construction, that is: by after steel structure connection rubbing surface blasting treatment, equal sprayed coating.But, steel bridge construction maintenance and reinforcement engineering is different from new construction, not only has the connection rubbing surface of newly-increased steel plate to process, and the connection rubbing surface also relating to existing component processes.The newly-increased direct sandblasting of steel plate is relatively easy construction, and existing component covers owing to its surface has coating, and coating layer thickness is big, high with existing component adhesion strength, coating thoroughly to be removed clean difficulty very big, need to expend substantial amounts of abrasive material and artificial, construction cost is high, environmental pollution is big, and the construction period is long.A kind of method being highly desirable to for this invent applicable steel bridge construction maintenance and reinforcement, with reach economy, energy-conserving and environment-protective, be prone to construction purpose.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, proposing the maintenance reinforcement method of a kind of steel bridge construction, the dope layer intractability of the connection rubbing surface solving existing component during steel bridge construction maintenance and reinforcement in prior art is big and causes the technical problem that construction cost is high, long in time limit, environmental pollution is big.
For reaching above-mentioned technical purpose, technical scheme provides the maintenance reinforcement method of a kind of steel bridge construction, comprises the following steps,
(1) surface of the newly-increased component for maintenance and reinforcement being carried out blasting treatment, after blasting treatment, sprayed coating forms the first friction coatings, dries stand-by；
(2) the connection rubbing surface of the existing component of reinforcing to be repaired on steel bridge construction being carried out blasting treatment, make the lower thickness of the dope layer connected on rubbing surface of existing component and form the second friction coatings, the thickness of described second friction coatings is 100 ~ 200 m；
(3) punch on newly-increased component and existing component, and by bolt, newly-increased component and existing component are connected fixing.
Preferably, in described step (2), blasting treatment is air pressure sandblasting, and the abrasive grain of sandblasting is 0.5 ~ 1.0mm, and compressed air pressure is 0.2 ~ 0.5MPa.
Preferably, in described step (2), the sandblasting distance of blasting treatment is 100 ~ 200mm, and sandblasting angle is 75 ~ 85 °.
Preferably, bottom that the dope layer connected on rubbing surface of described existing component includes spraying successively, intermediate layer, surface layer, described intermediate layer and surface layer are bilayer.
Preferably, in described step (2), frosted processes intermediate layer and the surface layer peeling that can make dope layer.
Preferably, described underlayer thickness is more than 100 m.
Preferably, the bottom of the dope layer connected on rubbing surface of described existing component is spray spelter coating, aluminium-plated coating or inorganic zinc-rich coating.
Preferably, described bottom, intermediate layer, surface layer are sprayed successively by the spray paint that kind is different respectively and form, and the cohesive force between intermediate layer and bottom or surface layer is respectively less than the cohesive force between bottom and existing component.
Preferably, in described step (3), bolt is high-strength bolt.
Preferably, in described step (2), the sand-blasting abrasive of blasting treatment is copper ore or yellow sand or quartz sand.
Compared with prior art, the beneficial effect comprise that making the dope layer connecting rubbing surface on existing component thinning by blasting treatment is second friction coatings of 100 ~ 200 m, abutted with the connection rubbing surface of newly-increased component by the second friction coatings, can provide and preferably connect rubbing surface structure, and the method is simple to operate, need not the upper dope layer connecting rubbing surface is all removed existing structure, sprayed coating again after more need not remove, shorten the engineering time, decrease the waste of abrasive material and the pollution to environment of the coating of removing in sandblasting procedures, be conducive to reduction and the raising of economic benefit of production cost.
Accompanying drawing explanation
Fig. 1 is the connection rubbing surface structural representation of the maintenance reinforcement method of the steel bridge construction of the present invention；
Wherein, 1, newly-increased component, 2, existing component, the 3, first friction coatings, the 4, second friction coatings.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment provides the maintenance reinforcement method of a kind of steel bridge construction, comprise the following steps,
(1) surface of the newly-increased component 1 for maintenance and reinforcement being carried out blasting treatment, after blasting treatment, sprayed coating forms the first friction coatings 3, dries stand-by；
(2) the connection rubbing surface of the existing component 2 of reinforcing to be repaired on steel bridge construction being carried out blasting treatment, make the lower thickness of the dope layer connected on rubbing surface of existing component and form the second friction coatings 4, the thickness of described second friction coatings 4 is 100 ~ 200 m；
(3) punch on newly-increased component and existing component, and by bolt, newly-increased component and existing component are connected fixing.
Wherein, it should be noted that, the rubbing surface that connects of the present embodiment defines essentially identical with the connection rubbing surface of prior art, for the abutting contact face in steel structure member connection procedure, concrete, in this enforcement, the rubbing surface that connects of newly-increased component 1 refers to abut on newly-increased component 1 contact surface of existing component 2, the rubbing surface that connects of existing component 2 refers to abut on existing component 2 contact surface of newly-increased component 1, i.e. increase the connection rubbing surface connecting rubbing surface and existing component 2 of component 1 newly for being oppositely arranged, coordinate two contact surfaces abutted, and then make newly-increased component 1 and existing component 2 form a connection rubbing surface structure by the abutting of two contact surfaces.
It is second friction coatings 4 of 100 ~ 200 m that embodiments of the invention make the dope layer connecting rubbing surface on existing component 2 thinning by blasting treatment, abutted by the connection rubbing surface of the second friction coatings 4 with newly-increased component 1, can provide and preferably connect rubbing surface structure, and the method is simple to operate, need not all remove the dope layer connecting rubbing surface on existing component 2, sprayed coating again after more need not remove, shorten the engineering time, decrease the waste of abrasive material and the pollution to environment of the coating of removing in sandblasting procedures, be conducive to reduction and the raising of economic benefit of production cost.
Blasting treatment in the step (1) of the present embodiment can use general grit-blasting treatment process in prior art, and the spray painting after blasting treatment is preferably aluminium-plated coating or inorganic zinc-rich coating.And blasting treatment is air pressure sandblasting in described step (2), the abrasive material of sandblasting is preferably copper ore or yellow sand, frosted granularity is 0.5 ~ 1.0mm, compressed air pressure is 0.2 ~ 0.5MPa, its objective is that the dope layer connecting rubbing surface being easy on existing component 2 can the most in layer peel off, prevent dope layer from peeling off too fast or the slowest, advantageously ensure that the thickness of the second friction coatings of formation is 100 ~ 200 m；And coat the treatment effect of layer to further improve the rubbing surface that connects on existing component 2, in step described in the present embodiment (2), the sandblasting distance of blasting treatment is 100 ~ 200mm, sandblasting angle is 75 ~ 85 °, enable on existing component 2 connect rubbing surface by a fixing blasting pressure, to reach the purpose that dope layer can peel off layer by layer.Wherein, the air line distance connecting rubbing surface that the sandblasting distance of the present embodiment is blast nozzle end face to existing component 2, sandblasting angle refers to the angle connecting rubbing surface of the movement locus after the abrasive material ejection of sandblasting and existing component 2.
General when new construction, need to process steel bridge construction to prevent it from getting rusty, corrode, extend its service life, the i.e. existing component 2 of the present embodiment need to carry out spray painting when new construction, owing to the maintenance and reinforcement in later stage is inevitable, and for follow-up maintenance and reinforcement, the process in new construction of the existing component 2 can be processed by certain requirement, to reach to be easy to later period maintenance reinforcing while extending its service life.Concrete, multilamellar spray paint can be sprayed successively on existing component 2, bottom that i.e. dope layer connected on rubbing surface of the existing component 2 of the present embodiment includes spraying successively, intermediate layer, surface layer, described intermediate layer and surface layer are bilayer, and double-deck intermediate layer and surface layer are and spray formation successively.And; blasting treatment for the ease of component 2 existing during maintenance and reinforcement; can be set to spray spelter coating, aluminium-plated coating or inorganic zinc-rich coating by the subbing of the dope layer connected on rubbing surface of existing component 2; can be sprayed by the underlayer thickness of sprayed coating is 120 ~ 200 m; thus increase the cohesive force between subbing and existing component 2; make its anti-drawing strength >=5.0MPa, increase its protection to existing component, strengthen the resistance to corrosion of existing component.
Further, after existing component 2 is processed by new construction by above-mentioned processing method, effectively intermediate layer and the surface layer of dope layer can be peeled off by the grit-blasting treatment process of above-mentioned steps (2) when maintenance and reinforcement, to reach to retain the purpose of subbing, make newly-increased to have one between component 1 with existing component 2 and be connected rubbing surface structure, this connection rubbing surface structure can preferably prevent newly-increased component 1 and existing component 2 from getting rusty, corroding, and extends the service life of newly-increased component 1 and existing component 2.Simultaneously, peel off for the ease of intermediate layer and surface layer, can be by bottom, intermediate layer, surface layer is sprayed successively by the spray paint that kind is different respectively and forms, and specifically chosen bottom, during the spray paint of intermediate layer and surface layer, the cohesive force between different spray paint need to be considered, it is advisable reaching the cohesive force between cohesive force respectively less than bottom and the existing component between intermediate layer and bottom or surface layer, prevent because of intermediate layer and surface layer, bonding force between intermediate layer and bottom is unfavorable for the peeling of intermediate layer and surface layer more than the cohesive force between subbing and existing component 2, i.e. intermediate layer and the surface layer of the present embodiment is preferably the coating that cohesive force is relatively weak, and subbing is preferably the coating that cohesive force is the strongest.But; it should be noted that herein; cohesive force between the intermediate layer of the present embodiment and bottom or surface layer is the most only slightly less than the cohesive force between subbing and existing component 2; rather than cohesive force between intermediate layer and bottom or surface layer is the smaller the better; because the cohesive force between intermediate layer and bottom or surface layer is too small, can not preferably protect existing component 2; easily because of the friction of nature, the factor such as touch and cause it to peel off from bottom, be unfavorable for extending the service life of existing component 2.
During the blasting treatment of step (2), for ease of determining sprayed coating peeling conditions, bottom, intermediate layer, surface layer different colors can be respectively set to, during making blasting treatment, the scaling amount of sprayed coating can be accurately controlled by the peeling degree of naked eyes identification sprayed coating.
This enforcement due to for for steel bridge construction, therefore in step (3), bolt is preferably high-strength bolt, consequently facilitating newly-increased fixing between component 1 and existing component 2, improves newly-increased connective stability between component 1 and existing component 2.
The detailed description of the invention of present invention described above, is not intended that limiting the scope of the present invention.Any technology according to the present invention is conceived various other made and is changed accordingly and deformation, should be included in the protection domain of the claims in the present invention.
Claims (9)
1. the maintenance reinforcement method of a steel bridge construction, it is characterised in that comprise the following steps,
(1) surface of the newly-increased component for maintenance and reinforcement being carried out blasting treatment, after blasting treatment, sprayed coating formation first rubs
Erasing layer, dries stand-by；
(2) the connection rubbing surface of the existing component of reinforcing to be repaired on steel bridge construction is carried out blasting treatment, make the company of existing component
Connecing the lower thickness of the dope layer on rubbing surface and form the second friction coatings, the thickness of described second friction coatings is
100～200 μm；
(3) punch on newly-increased component and existing component, and by bolt, newly-increased component and existing component are connected fixing.
Maintenance reinforcement method the most according to claim 1, it is characterised in that in described step (2), blasting treatment is empty
Atmospheric pressure sandblasting, the abrasive grain of sandblasting is 0.5～1.0mm, and compressed air pressure is 0.2～0.5MPa.
Maintenance reinforcement method the most according to claim 2, it is characterised in that the spray of blasting treatment in described step (2)
Sand distance is 100～200mm, and sandblasting angle is 75～85 °.
Maintenance reinforcement method the most according to claim 3, it is characterised in that connecting on rubbing surface of described existing component
Bottom that dope layer includes spraying successively, intermediate layer, surface layer, described intermediate layer and surface layer are bilayer.
Maintenance reinforcement method the most according to claim 4, it is characterised in that described underlayer thickness is more than 100 μm.
Maintenance reinforcement method the most according to claim 4, it is characterised in that described bottom, intermediate layer, surface layer respectively by
The different spray paint of kind sprays successively and forms, and the cohesive force between intermediate layer and bottom or surface layer is respectively less than bottom and existing component
Between cohesive force.
Maintenance reinforcement method the most according to claim 4, it is characterised in that connecting on rubbing surface of described existing component
The bottom of dope layer is spray spelter coating, aluminium-plated coating or inorganic zinc-rich coating.
Maintenance reinforcement method the most according to claim 1, it is characterised in that in described step (3), bolt is high intensity
Bolt.
Maintenance reinforcement method the most according to claim 3, it is characterised in that the spray of blasting treatment in described step (2)
Sand milling material is copper ore or yellow sand or quartz sand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510600683.9A CN105113432B (en) | 2015-09-21 | 2015-09-21 | A kind of maintenance reinforcement method of steel bridge construction |
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| CN201510600683.9A CN105113432B (en) | 2015-09-21 | 2015-09-21 | A kind of maintenance reinforcement method of steel bridge construction |
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| CN105113432B true CN105113432B (en) | 2017-01-04 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10233277B4 (en) * | 2002-07-23 | 2006-05-18 | Piller Entgrattechnik Gmbh | Process for deburring and cleaning workpieces |
| CN201047061Y (en) * | 2007-05-15 | 2008-04-16 | 四川天元机械工程有限责任公司 | Bridge steel component safeguard structure |
| CN101457592A (en) * | 2008-11-20 | 2009-06-17 | 江苏广宇建设集团有限公司 | Concrete structure affixing steel plate reinforcement method |
| DE102009015160A1 (en) * | 2009-03-26 | 2010-09-30 | Bayerische Motoren Werke Aktiengesellschaft | Process for producing a coated and / or available sheet metal part with a corrosion protection coating |
| CN202323699U (en) * | 2011-11-15 | 2012-07-11 | 江苏中矿大正表面工程技术有限公司 | Corrosion preventing and friction increasing coating structure for steel structure junction surface |
| CN102839824B (en) * | 2012-09-14 | 2015-04-08 | 河北省建筑科学研究院 | Steel-bonded reinforcement method for steel structure |
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Address after: Room 2101-2104, 21 / F, unit a, block a, Hubei science and technology venture building, Xiaohongshan East District, Wuchang District, Wuhan City, Hubei Province, 430061 Patentee after: CCCC Road & Bridge Special Engineering Co.,Ltd. Address before: 21/F, Unit A-A, Hubei Science and Technology Entrepreneurship Building, Xiaohongshan East District, Wuchang District, Wuhan City, 430000 Hubei Province Patentee before: CCCC ROAD & BRIDGE SPECIAL ENGINEERING Co.,Ltd. |