CN103195259B - Method for reinforcing concrete structure by foam concrete prefabricated slab - Google Patents
Method for reinforcing concrete structure by foam concrete prefabricated slab Download PDFInfo
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- CN103195259B CN103195259B CN201310095897.6A CN201310095897A CN103195259B CN 103195259 B CN103195259 B CN 103195259B CN 201310095897 A CN201310095897 A CN 201310095897A CN 103195259 B CN103195259 B CN 103195259B
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Abstract
The invention provides a method for reinforcing a concrete structure by a foam concrete prefabricated slab. The method comprises the following steps: step1 designing the foam concrete prefabricated slab for reinforcement according to a reinforcement request. The prefabricated slab is composed of foam concrete layer, a heat insulation layer and an appearance layer. The foam concrete layer is formed by a steel bar mesh, a steel wire mesh or a steel strand and foam concrete in pouring mode. Stirrups are connected onto the steel bar mesh or the steel wire mesh in overlapping mode, steel bar connectors are retained on the stirrups to connect a plurality of adjacent prefabricated slabs, or the foam concrete layer is formed by pouring the foam concrete. The method further comprises the following steps: step2 laying an elastic layer on the outer surface of a structure member to be reinforced and step3 closely wrapping the prefabricated slab designed in the step1 on the elastic layer laid on the structure member in the step2 and welding the stirrups that the adjacent prefabricated slab corresponds to form a complete reinforcing layer. The slab and the method can combine advantages of concrete reinforcement and steel bonding method reinforcement and can be used for reinforcement of columns, beams, plates, piers, wall bodies and other members.
Description
Technical field
The present invention relates to technical field of civil engineering, specifically a kind ofly adopt prefabricated property sheet material to the method for concrete structure Rapid-Repair and reinforcing, and foam concrete precast plate.
Background technology
The design life of general concrete structure is 50 years.When building structure reaches design life, structural performance does not significantly reduce, and still can to continue normal use after reinforcing, consider to remove reconstructed cost larger, the way of structural strengthening can be adopted, structure is keeped in repair, reinforce, ensure that its bearing capacity meets code requirement.
Structure does not reach service life, but because use and maintenance is improper or build guality reason, or in current national related specifications situation, can not meet through Structural Identification that bearing capacity and durability Design require, or in new instructions for use, part building will change purposes or carry out adding layer etc., needs to reinforce original structure.
At present, the reinforcement means of building structure has enlarging section, displacement concrete strengthening method, bonding steel-encasing strengthening method, affixing steel plate reinforcement method, pastes the methods such as fibre reinforced plastics reinforcing method.Section-increased method and displacement coagulation local method all adopt concreting, although construction technology is simple, strong adaptability, the wet trade time of site operation is long, can not meet cycle short requirement.The construction of bonding steel-encasing strengthening method is simple and convenient, but consumption steel material is large, and cost is higher, and should not be used for the high temperature place in unshielded situation.Affixing steel plate reinforcement rule be applicable under dead load by reinforcing that is curved or tensional element, can not anti-seismic performance be improved.
Therefore, be necessary to work out a kind of in conjunction with the method for concrete strengthening method and steel reinforcing method advantage, can reaching and both reduced wet trade, shorten construction period, reduce steel consumption amount again, improve the effect of building structure aseismatic aspect of performance.
Through the literature search to prior art, Chinese Patent Application No.: 03227027.5, denomination of invention: a kind of steel plate mesh foamed concrete light wallboard, publication number: CN2599109, this patent is summarized as: a kind of steel plate mesh foamed concrete light wallboard, is made up of with the foam concrete two parts making packing material the steel plate cylinder mould making skeleton.Although this light wall board high-strength light, combine reinforcing bar and concrete advantage, can be prefabricated, good endurance, easy construction, but can not load-bearing be used for, its purposes is subject to larger restriction, is therefore necessary to invent a kind of prefabricated panels having more universality and application.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of foam concrete precast plate, and adopt the method for foam concrete precast plate reinforced concrete structure, the advantage can reinforced in conjunction with concrete strengthening and steel bonding method, and have quick and portably construct, construction operation is few, short construction period, consolidation effect are good, strenthening member can be prefabricated, easily realizes the advantages such as production, can be used in the reinforcing of the components such as post, beam, plate, bridge pier, body of wall, there is engineer applied widely.
According to an aspect of the present invention, a kind of method adopting foam concrete precast plate reinforced concrete structure is provided, comprises the steps:
The first step, the foam concrete precast plate of reinforcing is designed for according to reinforcement criteria, this precast plate is by bubble concrete layer, insulation layer and outward appearance layer composition, described bubble concrete layer is built by steel mesh reinforcement or gauze wire cloth or steel strand and foam concrete and is formed, steel mesh reinforcement or gauze wire cloth or steel strand are overlapped with stirrup, stirrup reserved steel bar joint, connect between multiple contiguous prefabricated plate; Or described bubble concrete layer forms by foam concrete is cast-in-place;
Second step, lays one deck elastic layer to the structural element external surface needed reinforcement;
3rd step, the precast plate first step designed is tightly outer to be wrapped on elastic layer that second step lays, and is welded by stirrup corresponding for contiguous prefabricated plate, forms complete back-up coat.
Preferably, described bubble concrete layer, when reinforcing for pressurized or flexural member, adopts steel mesh reinforcement, when reinforcing for tensional element, adopts gauze wire cloth or steel strand.
Preferably, described insulation layer is made up of screed, adiabator layer.Screed is arranged between bubble concrete layer and adiabator layer.The light high performance of heat insulating material, according to architectural environment requirement, can adopt polyurethane foam or extruded sheet; Screed possesses certain adhesive property, and proportioning is selected according to requirement of strength, plays the effect of bonding bubble concrete layer and adiabator layer.
Preferably, described outward appearance layer is made up of articulamentum, light weight board, and articulamentum is the transition zone at outward appearance layer and insulation layer interface, and light weight board can be selected according to actual requirement, such as FPP foaming plate, GRC light weight board etc.Articulamentum can adopt the bonding interface agent possessing some strength, as ABS bonding agent.
Preferably, described precast plate is skirt form with the contact surface of the structural element needed reinforcement, and connects with bolt.To increase the shear resistance of precast plate.
Preferably, described precast plate junction adopts preset stirrup in precast plate to connect, can operative constraint precast plate, improves the integral working of precast plate, and improves the compressive strength of former concrete component.
Preferably, described stirrup is encrypted setting in the end of the structural element needed reinforcement.
Preferably, the stirrup lap-joint of described contiguous prefabricated plate is provided with reserving hole, and this hole can be made into semicircle or arc.
According to a further aspect in the invention, a kind of foam concrete precast plate is provided, this precast plate is by bubble concrete layer, insulation layer and outward appearance layer composition, described bubble concrete layer is built by steel mesh reinforcement or gauze wire cloth or steel strand and foam concrete and is formed, steel mesh reinforcement or gauze wire cloth or steel strand are overlapped with stirrup, stirrup reserved steel bar joint, connect between multiple contiguous prefabricated plate.
Operating principle of the present invention:
One, based on the high-strength light characteristic of foam concrete.By being added with the foam concrete of steel mesh reinforcement (gauze wire cloth), form the reinforced concrete shear wall of high-strength light, precast plate quality is more a lot of than the concrete light under equal conditions, slightly heavier than the reinforcing of clean steel material, and intensity is substantially constant even increases; Insulation layer effectively can hinder the heat subtracting extraneous transmission and come in, and reduces indoor and outdoor exchange heat total amount, can realize insulation and fireproof function; Outward appearance layer can be selected according to the appearance requirement of building structure and actual needs, has good aesthetic.
Two, based on bearing distribution and the compatibility of deformation of prefabricated plates and original structure.Prefabricated panels tension, resistance to compression equal strength index, on the basis of design strength reaching reinforcing, effectively can bear the upper load of former component; Elastic layer between precast plate and the component that need reinforce can coordinate the distortion of former component and outsourcing precast plate bubble concrete layer, guarantees that new-old concrete can collaborative work, improves component service behaviour, the application life of extending structure.
Compared with prior art, the present invention has following beneficial effect:
1. formulate size according to designing requirement, sheet material shape can adapt to different requirement.2. can realize plant produced and prefabricated, be transported to reinforcing scene and directly assemble, convenient and swift, shorten construction period.3. the performance of new-old concrete bed boundary deformation is improved.4. prefabricated panels energy-absorbing effect is good, can improve the anti-seismic performance of structural element.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is foam concrete precast plate material composition schematic diagram.
Fig. 2 is foam concrete precast plate elevational schematic view.
Fig. 3 ~ Fig. 5 is the method schematic diagram of reinforced column.
In figure, each label represents:
1. foam concrete precast plate, 1.1 foam concrete, 1.2 steel mesh reinforcements, 1.3 stirrups, 1.4 mortars, 1.5 insulation layers, 1.6 bonding interface agent, 1.7 thistle boards (PLASTIC LAMINATED), 2. reserving hole, 3. rubber layer, 4. bolt, 5. floor, 6. post, 7. stirrup welding point.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Embodiment 1
As shown in Figure 1-2, the present embodiment provides a kind of method adopting foam concrete precast plate reinforced concrete structure, wherein adopts foam concrete precast plate 1 to reinforce, and requires that strenthening member external surface first lays elastic layer, again by being wrapped on elastic layer outside precast plate, install successively.
In the present embodiment, described foam concrete precast plate 1 is made up of bubble concrete layer 1.1, insulation layer 1.5 and outward appearance layer, and outward appearance layer is outermost layer, and insulation layer is between bubble concrete layer and outward appearance layer, and bubble concrete layer is used for being connected with strenthening member.
In the present embodiment, described bubble concrete layer can by steel mesh reinforcement or gauze wire cloth or steel strand and foam concrete be cast-in-place forms, or forms by foam concrete is cast-in-place.When reinforced column, pier column and load bearing wall, adopt steel mesh reinforcement foam concrete; Adopt steel wire net foamed concrete when reinforcement, plate, the pore that formation built by foam concrete is evenly closely knit, and quality is light and intensity is high, and foam stability is strong, good heat insulating.When replacing non-bearing wall body, directly adopt foam concrete.
In the present embodiment, foam concrete precast plate is also provided with stirrup, reserving hole and sheet material skirt.Described stirrup is overlapped on steel mesh reinforcement and indulges on muscle, and the stirrup of corresponding strenthening member end is encrypted setting, and reserved steel bar joint, connects between precast plate; Described reserving hole is the stirrup lap-joint of contiguous prefabricated plate, can be made into semicircle or arc; Described sheet material skirt is that the contact surface of sheet material and strenthening member is made into skirt form, and connects with bolt.
In the present embodiment, described insulation layer is made up of screed, adiabator layer: the light high performance of the heat insulating material of adiabator layer, according to architectural environment requirement, can adopt polyurethane foam or extruded sheet; Screed must possess certain adhesive property, and proportioning is selected according to requirement of strength, is arranged between bubble concrete layer and adiabator layer, plays the effect of bonding foam coagulating layer and heat insulating material, thickness range 5-10mm.
In the present embodiment, described outward appearance layer is made up of articulamentum, light weight board 1.7, and light weight board is that quality is light, and field fabrication is convenient, meets the requirement of some strength, such as FPP foaming plate, GRC light weight board etc.; Articulamentum is the transition zone at outward appearance layer and insulation layer interface, adopts the bonding interface agent 1.6 possessing some strength, as ABS bonding agent.
Adopt above-mentioned foam concrete precast plate, specific implementation step during reinforced concrete structure component of the present invention following (only enumerating the Scheme of Strengthening of post):
The first step: according to the former design data of structure, Structural Identification data and Scheme of Strengthening designing and calculating, carries out project navigator to foam concrete precast plate 1, is prefabricated into required shape.
Bis-Walk: carry out removing surface to the component that need reinforce, guarantees that surface is clean and tidy, and the position that there is crack must use bonding agent to repair.
Tri-Walk: frivolous rubber layer 3 is evenly attached to component surface (3-5mm is thick, has favorable elasticity, and construction requirement must be smooth, can not leave bubble or purse up position).
Tetra-Walk: foam concrete precast plate is installed.Jack must be adopted during reinforced column by styletable up jack-up, precast plate is adjacent to rubber layer, by stirrup electric welding, completes the split of precast plate, then jack is slowly removed, guarantee the precast plate of outsourcing and former component synergism work.
5th step: by bolt 4 anchoring of precast plate skirt place, improves precast plate shear resistance, fills the reserving hole 2 on precast plate.
Embodiment 2
The present embodiment adopts foam concrete precast plate described in embodiment 1 and implementation step reinforced column.
As in Figure 3-5, for square pillar, by four tightly outer four limits wrapping in post of block-shaped the same square foam coagulate plate 1, frivolous rubber layer 3 is sticked between post and gusset plate, type of attachment between coagulate plate 1 adopts welding 7, stirrup 1.3 is adopted Type of Welding at place, weld complete after timely reserving hole 2 to be filled, packing material can adopt cement mortar or concrete.For circular columns, precast plate can be made into half-circle-arc shape, after outsourcing and post, precast plate is reserved the electric welding of stirrup joint.
Embodiment 3
The present embodiment adopts the foam concrete precast plate described in embodiment 1 and implementation step to substitute body of wall.
For load bearing wall, described foam concrete precast plate can directly be filled between beam column, serves as body of wall, and sheet material can bear upper load, and meets insulation, fire protection requirement; For non-bearing wall, layer of concrete proposed by the invention then without the need to steel mesh reinforcement 1.2, directly serves as body of wall.
Embodiment 4
The present embodiment adopts foam concrete precast plate described in embodiment 1 and implementation step reinforced bridge pier post.
For single-column bridge pier, at pier column both lateral sides outsourcing foam concrete precast plate, connected mode with reference to as in Figure 3-5, can increase the lateral stiffness of single-column, improves the vibration frequency of post.For Double Column Piers post, foam concrete precast plate is set in the middle of post, as the horizontal coupling beam of two posts, improves lateral stiffness and the anti-bending strength of bridge pier, the lateral displacement of restriction vehicle to run process Dun Ding.
The present invention is based on the characteristic that foam concrete high-strength light and precast plate and former component synergism are out of shape.Bubble concrete layer mainly plays a part to bear original structure load, and the characteristic of its high-strength light determines to bear pressure, pulling force, moment of flexure and dynamic loading, good with former component coordination performance.Insulation layer can play the effect that resistance subtracts delivered heat, has fireproof performance, protection bubble concrete layer and original structure component.Outward appearance layer can be selected according to the aesthetic of building.When reinforced column, foam concrete precast plate layer of concrete adopts steel mesh reinforcement, and its mechanical strength feature class is similar to shear wall, former component can be provided additionally to increase the compressive strength of the required designing requirement of load, can bear larger external load; When reinforcement, foam concrete precast plate layer of concrete adopts gauze wire cloth, and gauze wire cloth can provide great tensile strength, and the quality of precast plate is less simultaneously, little to the effect of weight of original structure.The precast plate that the present invention proposes directly can be used as infilled wall, and now bubble concrete layer need not add reinforcing bar (silk) net.The advantage that methods combining of the present invention concrete and steel are reinforced, and can be prefabricated in the factory, reduce situ wet operation, accelerate structural strengthening construction speed, have good application prospect in practice.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. adopt a method for foam concrete precast plate reinforced concrete structure, it is characterized in that comprising the steps:
The first step, the foam concrete precast plate of reinforcing is designed for according to reinforcement criteria, this precast plate is by bubble concrete layer, insulation layer and outward appearance layer composition, described bubble concrete layer is built by steel mesh reinforcement or gauze wire cloth or steel strand and foam concrete and is formed, steel mesh reinforcement or gauze wire cloth or steel strand are overlapped with stirrup, stirrup reserved steel bar joint, connect between multiple contiguous prefabricated plate; Or described bubble concrete layer forms by foam concrete is cast-in-place;
Second step, lays one deck elastic layer to the structural element external surface needed reinforcement;
3rd step, the precast plate first step designed is tightly outer to be wrapped on elastic layer that second step structural element lays, and is welded by stirrup corresponding for contiguous prefabricated plate, forms complete back-up coat.
2. the method for employing foam concrete precast plate reinforced concrete structure according to claim 1, is characterized in that, described bubble concrete layer, when reinforcing for pressurized or flexural member, adopts steel mesh reinforcement; When reinforcing for tensional element, adopt gauze wire cloth or steel strand; When replacing non-bearing wall body, directly adopt foam concrete.
3. the method for employing foam concrete precast plate reinforced concrete structure according to claim 1, it is characterized in that, described insulation layer is made up of screed, adiabator layer, and screed is arranged between bubble concrete layer and adiabator layer.
4. the method for employing foam concrete precast plate reinforced concrete structure according to claim 3, is characterized in that, the heat insulating material of described adiabator layer adopts polyurethane foam or extruded sheet.
5. the method for employing foam concrete precast plate reinforced concrete structure according to claim 1, it is characterized in that, described outward appearance layer is made up of articulamentum, light weight board, and articulamentum is the transition zone at outward appearance layer and insulation layer interface.
6. the method for the employing foam concrete precast plate reinforced concrete structure according to any one of claim 1-5, is characterized in that, described precast plate is skirt form with the contact surface of the structural element needed reinforcement, and connects with bolt.
7. the method for the employing foam concrete precast plate reinforced concrete structure according to any one of claim 1-5, it is characterized in that, described precast plate junction adopts preset stirrup in precast plate to connect, and described stirrup is encrypted setting in the end of the structural element needed reinforcement.
8. the method for the employing foam concrete precast plate reinforced concrete structure according to any one of claim 1-5, it is characterized in that, the stirrup lap-joint of described contiguous prefabricated plate is provided with reserving hole, and this hole is made into semicircle or arc.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310095897.6A CN103195259B (en) | 2013-03-22 | 2013-03-22 | Method for reinforcing concrete structure by foam concrete prefabricated slab |
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| CN201310095897.6A CN103195259B (en) | 2013-03-22 | 2013-03-22 | Method for reinforcing concrete structure by foam concrete prefabricated slab |
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| CN103195259B true CN103195259B (en) | 2015-04-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104499608B (en) * | 2014-12-19 | 2017-03-08 | 江苏鼎达建筑新技术有限公司 | The design and construction method of prestressing force section steel reinforcement shear wall |
| CN105464396B (en) * | 2015-11-16 | 2018-02-06 | 上海建工五建集团有限公司 | A kind of historical protective buildings exterior wall reinforcement means |
| CN109227912A (en) * | 2018-11-07 | 2019-01-18 | 广西景典装配式建筑股份有限公司 | A kind of lightweight insulating concrete prefabricated board and its manufacturing method |
| CN111550077A (en) * | 2020-06-05 | 2020-08-18 | 中土大地国际建筑设计有限公司 | Fabricated anti-seismic reinforcing reconstruction structure and reconstruction construction method of existing building |
| CN112906109B (en) * | 2021-01-28 | 2023-03-28 | 中国电建集团华东勘测设计研究院有限公司 | Layered pouring design method for rapidly filling deep cushion layer by utilizing foam concrete |
| CN114517595B (en) * | 2022-03-10 | 2023-12-08 | 山东省建筑科学研究院有限公司 | Assembled reinforced existing masonry structure system and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES8504310A1 (en) * | 1983-04-27 | 1985-04-16 | Navarro Villarreal Jose Juan | Improvements to panels for lightened walls |
| KR20060083783A (en) * | 2005-01-18 | 2006-07-21 | 유성권 | Method for mending/reinforcing crack of concrete structures using a stainless steel wire mesh |
| CN202391047U (en) * | 2011-11-04 | 2012-08-22 | 赵民忠 | Wallboard with integrated function of envelope and thermal insulation |
| CN202440987U (en) * | 2012-03-01 | 2012-09-19 | 浙江东源建设有限公司 | Prefabricated wall panel with window hole |
| CN102704585A (en) * | 2011-03-28 | 2012-10-03 | 张戈 | Construction technology for noncombustible type double-interlayer foam concrete insulation board |
-
2013
- 2013-03-22 CN CN201310095897.6A patent/CN103195259B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES8504310A1 (en) * | 1983-04-27 | 1985-04-16 | Navarro Villarreal Jose Juan | Improvements to panels for lightened walls |
| KR20060083783A (en) * | 2005-01-18 | 2006-07-21 | 유성권 | Method for mending/reinforcing crack of concrete structures using a stainless steel wire mesh |
| CN102704585A (en) * | 2011-03-28 | 2012-10-03 | 张戈 | Construction technology for noncombustible type double-interlayer foam concrete insulation board |
| CN202391047U (en) * | 2011-11-04 | 2012-08-22 | 赵民忠 | Wallboard with integrated function of envelope and thermal insulation |
| CN202440987U (en) * | 2012-03-01 | 2012-09-19 | 浙江东源建设有限公司 | Prefabricated wall panel with window hole |
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