CN109469349A - A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam - Google Patents
A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam Download PDFInfo
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- CN109469349A CN109469349A CN201811375997.3A CN201811375997A CN109469349A CN 109469349 A CN109469349 A CN 109469349A CN 201811375997 A CN201811375997 A CN 201811375997A CN 109469349 A CN109469349 A CN 109469349A
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- secondary beam
- reinforced concrete
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- concrete secondary
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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
- E04G23/0237—Increasing or restoring the load-bearing capacity of building construction elements of storey floors
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- Engineering & Computer Science (AREA)
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- 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
A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam, the positioning of (1) secondary beam；(2) interface dabbing: dabbing processing is carried out to contact surface and is cleaned out；(3) two filling concrete holes floor aperture: are opened up on floor；(4) muscle positioning, drilling are indulged；(5) it indulges muscle tapping: carrying out tapping using end of the screw-rolling machine to longitudinal reinforcement, longitudinal reinforcement end is processed into shape of threads；(6) it is segmented bar planting: the longitudinal reinforcement of newly-increased reinforced concrete secondary beam is divided into the long section of vertical muscle and vertical muscle short section two；(7) assembling reinforcement: the long section of vertical muscle is subjected to binding within the scope of the reserved lap of splice in centre with vertical muscle short section two parts and is connected；(8) formwork: (9) casting concrete.This method is able to solve the problem of setting up template when construction site in the prior art is difficult to be arranged shuttering supporting, can improve the quality poured.This method construction period is short, and construction technology is simple, and consolidation effect is good, and good integrity, reasonable stress after reinforcing.
Description
Technical field
The invention belongs to building structure strengthening technical field of construction, and in particular to a kind of building for adding reinforced concrete secondary beam
Plate strengthening reconstruction method.
Background technique
In the construction of reinforced concrete structure house and use process, due to inevitable in design, construction or use process
Will appear leads to problems such as reinforced concrete floor span excessive caused Lack of support, cracking, flexure, deformation occur, from
And leading to bearing capacity, rigidity and the stability decline of reinforced concrete floor, less serious case influences the normal use of floor, meeting when serious
It loses floor using function, damaged even slump, causes safety accident.It needs to carry out floor by way of adding secondary beam
It reinforces.
In these cases, it requires the safety to original reinforced concrete floor accurately to be identified, and takes
Corresponding measure carries out reasonable transformation and reinforces to meet bearing capacity, stability requirement.Former floor is removed to set again in the original location
New floor is set, there is problems long in time limit, at high cost.Usually have to the reinforcement means of floor and pastes carbon fiber using in board bottom
Wei Bu, but this method can not all change the span of plate and by power path.In addition, commonly simple add secondary beam in board bottom
Can not negative moment of backing plate area to floor increase negative reinforcement.In order to guarantee that room can continue to using preventing in load bearing process
It goes wrong, it is necessary to ensure that floor has enough bearing capacities, needs to study and invents a kind of short time limit, quick, construction technology
Simply, good integrity after reinforcing, the strengthening reconstruction method of reasonable stress carry out strengthening reconstruction to reinforced concrete floor.To sum up
It is described, the new way of floor Reinforcement is developed, realizes quick to floor, efficient, reliable, reasonably strengthening reconstruction, there is weight
The meaning wanted.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of floor reinforcings for adding reinforced concrete secondary beam
Remodeling method, this method construction period is short, and construction technology is simple, and consolidation effect is good, and good integrity, stress are closed after reinforcing
Reason.
To achieve the goals above, the present invention provides a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam,
The following steps are included:
(1) secondary beam positions: positioning to newly-increased reinforced concrete secondary beam；
(2) interface dabbing: to newly-increased reinforced concrete secondary beam top surface, newly-increased reinforced concrete secondary beam end face, soffit
And the contact surface of the corresponding newly-increased reinforced concrete secondary beam of raw steel Concrete Beam Reinforced carries out dabbing processing and cleans out；
(3) floor aperture: the part of corresponding newly-increased reinforced concrete secondary beam opens up out along its length on floor runs through
Newly-increased reinforced concrete secondary beam is divided into third by two filling concrete holes of its thickness direction, two filling concrete holes
Part；
(4) muscle positioning, drilling are indulged: to the installation of newly-increased reinforced concrete secondary beam longitudinal reinforcement on raw steel Concrete Beam Reinforced
Position is positioned, and is drilled；
(5) it indulges muscle tapping: carrying out tapping using end of the screw-rolling machine to longitudinal reinforcement, longitudinal reinforcement end is processed into spiral shell
Line shape；
(6) it is segmented bar planting: the longitudinal reinforcement of newly-increased reinforced concrete secondary beam is divided into the long section of vertical muscle and vertical muscle short section two
Point, by the longitudinal reinforcement of the long section one end of vertical muscle by being passed through in the drilling in the raw steel Concrete Beam Reinforced of side, and padded in end
Plate and nut are fixed, and anchor force is enhanced；By all stirrups of newly-increased reinforced concrete secondary beam from the other end set of the long section of vertical muscle
Enter, then by the longitudinal reinforcement of vertical muscle short section one end by being passed through in the drilling in the raw steel Concrete Beam Reinforced of the other side, and in end
Portion is fixed with backing plate and nut, enhances anchor force；
(7) assembling reinforcement: the long section of vertical muscle and vertical muscle short section two parts are tied up within the scope of the reserved lap of splice in centre
Connection is pricked, the longitudinal reinforcement for forming newly-increased reinforced concrete secondary beam is whole；Then after stirrup being determined good position by setting spacing
Framework of steel reinforcement is formed together with longitudinal reinforcement binding；
(8) formwork: the template of newly-increased reinforced concrete secondary beam is installed in floor slab bottoms；
(9) casting concrete: pouring for concrete is carried out simultaneously by two filling concrete holes.
Method in the present invention, by the way that the concrete dabbing of contact surface ensure that newly-increased reinforced concrete secondary beam and former knot
Cohesive force between structure makes have good cooperative transformation ability, globality between newly-increased reinforced concrete secondary beam and original structure
More preferably.Currently, concrete need to be flowed into template by the horn mouth on top, horn mouth is made of plank sheathing, concrete
After pouring, a triangle concrete block can be left in horn mouth position, need it is secondary pick chisel, often horn mouth indwelling is too small, leads
It causes vibrating spear to be not easy to be inserted into, is used to be poured there are two filling concrete hole by opening up on floor, concrete can be effectively ensured
Compaction rate；By the way that the longitudinal reinforcement segmentation of newly-increased reinforced concrete secondary beam to be implanted into raw steel Concrete Beam Reinforced, wait be inserted in
After all stirrups, then by way of binding two sections of vertical muscle are linked together, efficiently solves and indulged in existing building structure
The difficulty that muscle is added；By the way that longitudinal reinforcement is anchored at raw steel to longitudinal reinforcement end point thread, and using billet and nut
On Concrete Beam Reinforced, the anchoring effect of longitudinal reinforcement in the structure is effectively enhanced.The present invention can effectively change floor
Path of Force Transfer, it is good to the floor consolidation effect of deformation, meanwhile, work progress of the present invention is simple, and the construction period is short, reinforcing it is reliable
Property it is high, and the structure stress reinforced is more reasonable.
Further, further include following steps:
(10) hogging moment area Ban Ding reinforces: sticking carbon fibre cloth layer in the hogging moment region of floor upper surface.In underfloor
While portion adds reinforced concrete secondary beam, carbon fiber is pasted to the floor top hogging moment area of newly-increased reinforced concrete secondary beam two sides
Cloth improves the bearing capacity that floor resists hogging moment.
As a preference, carbon fibre cloth layer is a plurality of by the direction equidistantly distributed along former floor negative reinforcement in (10)
Two carbon cloths two composition of carbon cloth one and the directional spreding of vertical former floor negative reinforcement, two carbon cloths two laterally pass through
It is connected to the both ends of a plurality of carbon cloth one logically；The width of carbon cloth one is 200mm, the spacing of adjacent carbon cloth one
For 100mm.
Further, it in (9), is poured using the pea gravel concreten of good fluidity, is torn open after conserving to regulation age
Mould.The characteristic that pea gravel concreten has good fluidity, intensity height, microdilatancy, shrinking percentage low, and can ensure that and pour from vibrating
The compaction rate for the concrete built.
Further, in order to improve the bonding strength of the long section of vertical muscle or vertical muscle short section end and raw steel Concrete Beam Reinforced, in (6)
In, structure is filled with when indulging the longitudinal reinforcement of the long section of muscle or vertical muscle short section end by passing through in the drilling in raw steel Concrete Beam Reinforced
Glue.
Further, in order to which the adhesion strength for improving structure glue cleans out hole after drilling in (4).
Further, it pours efficiency in order to improve and pours effect, the diameter in filling concrete hole is 8~10cm.
The present invention has the characteristics that installation process is efficient, applied widely, has and promotes and make practical value well,
Good economic benefit can be generated after extensive popularization and application.
Detailed description of the invention
Fig. 1 is that schematic diagram is placed and anchored to the reinforcing bar of newly-increased reinforced concrete secondary beam provided by the invention；
Fig. 2 is the sectional schematic diagram of Fig. 1；
Fig. 3 is the top view that the reinforcing bar of newly-increased reinforced concrete secondary beam provided by the invention is placed；
Fig. 4 be Fig. 3 A-A to cross-sectional view.
In figure: 1, indulging the long section of muscle, 2, vertical muscle short section, 3, backing plate, 4, nut, 5, carbon cloth one, 6, stirrup, 7, raw steel muscle
Beams of concrete, 8, floor, 9, filling concrete hole, 10, newly-increased reinforced concrete secondary beam, 11, frame column, 12, vertical muscle binding takes
Contact, 13, Vierendeel girder.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in figure 3, original form bracing structure is by being located at four frame columns 11 of lower part quadrangle, connecting two frame columns
Vierendeel girder 13 between two 11 upper ends of frame column of raw steel Concrete Beam Reinforced 7 between 11 and connection forms, and increases under the floor 6
If the reinforced beam that a sectional dimension is 250mm × 400mm.Detailed process is as follows:
As shown in Figures 1 to 4, a kind of 8 strengthening reconstruction method of floor for adding reinforced concrete secondary beam, including following step
It is rapid:
(1) secondary beam positions: according to 8 span of floor in design scheme to newly-increased 10 unwrapping wire of reinforced concrete secondary beam, to newly-increased
Reinforced concrete secondary beam 10 is positioned；
(2) interface dabbing: to newly-increased 10 top surface of reinforced concrete secondary beam, newly-increased 10 end face of reinforced concrete secondary beam, floor 8
The contact surface of bottom surface and the corresponding newly-increased reinforced concrete secondary beam 10 of raw steel Concrete Beam Reinforced 7 carries out dabbing processing and cleans out；
To enhance the caking property of newly-increased reinforced concrete secondary beam 10 and original structure (floor 8), using newly-increased reinforced concrete secondary beam 10 with
There is good cooperative transformation ability, globality is more preferable between original structure.
(3) floor aperture: the part of corresponding newly-increased reinforced concrete secondary beam 10 opens up out along its length on floor 8 passes through
Two filling concrete holes 9 of its thickness direction are worn, newly-increased reinforced concrete secondary beam 10 is divided by two filling concrete holes 9
Three equal parts；The diameter in filling concrete hole 9 is 8~10cm.Filling concrete hole 9 is for pouring pea gravel concreten or grouting material etc.
The low material of good fluidity, intensity height, microdilatancy, shrinking percentage；
(4) muscle positioning, drilling are indulged: to newly-increased 10 longitudinal reinforcement of reinforced concrete secondary beam on raw steel Concrete Beam Reinforced 7
Installation site is positioned, and is drilled；And hole is cleaned out after piercing.
(5) it indulges muscle tapping: carrying out tapping using end of the screw-rolling machine to longitudinal reinforcement, longitudinal reinforcement end is processed into spiral shell
Line shape, in order to for the fastening by nut.
(6) it is segmented bar planting: the longitudinal reinforcement of newly-increased reinforced concrete secondary beam 10 is divided into the long section 1 of vertical muscle and vertical muscle short section 2
Two parts, by the longitudinal reinforcement of long 1 one end of section of vertical muscle by being passed through in the drilling in the raw steel Concrete Beam Reinforced 7 of side, and in end
Portion's backing plate 3 and nut 4 are fixed, enhance anchor force；By all stirrups of newly-increased reinforced concrete secondary beam 10 from the long section 1 of vertical muscle
Other end is inserted in, then by the longitudinal reinforcement of vertical 2 one end of muscle short section by the drilling in the raw steel Concrete Beam Reinforced 7 of the other side
It passes through, and fixed in end backing plate 3 and nut 4, enhances anchor force；The longitudinal reinforcement of the vertical long section 1 of muscle or vertical 2 end of muscle short section
Structure glue is filled with when by passing through in the drilling in raw steel Concrete Beam Reinforced 7.
(7) assembling reinforcement: the long section 1 of vertical muscle and vertical 2 two parts of muscle short section are carried out within the scope of the reserved lap of splice in centre
Binding connection forms the vertical of newly-increased reinforced concrete secondary beam 10 as shown in Figure 1, being attached at vertical muscle binding overlapped points 12
To reinforcing bar entirety；Then stirrup is determined by setting spacing and forms framework of steel reinforcement together with longitudinal reinforcement binding after good position；
(8) formwork: the template of newly-increased reinforced concrete secondary beam 10 is installed in 8 bottom of floor；During being somebody's turn to do, because of the building Yi
It is provided with concrete plug hole 9 on plate 8, so being not required to stay lateral horn mouth at the top of side form, can solve and usually opened at the top of side form
Horn mouth is poured concrete, causes vibrating spear to be not easy insertion uncompacted to lead to the problem of concreting.
(9) casting concrete: pouring for concrete is carried out simultaneously by two filling concrete holes 9.Using good fluidity
Pea gravel concreten poured, the demoulding after conserving to regulation age.
Further include following steps:
(10) hogging moment area Ban Ding reinforces: carbon fibre cloth layer is sticked in the hogging moment region of 8 upper surface of floor, to be used to support
The hogging moment of anti-newly-increased secondary beam upper floor.
In (10), carbon fibre cloth layer by the direction equidistantly distributed along former 8 negative reinforcement of floor one 5 He of a plurality of carbon cloth
Two carbon cloths two composition of the directional spreding of vertical original 8 negative reinforcement of floor is connected to two two lateral direction penetratings of carbon cloth
The both ends of a plurality of carbon cloth 1；The width of carbon cloth 1 is 200mm, and the spacing of adjacent carbon cloth 1 is
100mm。
Present invention is particularly suitable for since floor span is big, changes caused by load increase caused by service function of the rooms
The strengthening reconstruction of the floors such as bearing capacity of floor slab deficiency, cracking, deflection deformation.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam, which comprises the following steps:
(1) secondary beam positions: positioning to newly-increased reinforced concrete secondary beam (10)；
(2) interface dabbing: to newly-increased reinforced concrete secondary beam (10) top surface, newly-increased reinforced concrete secondary beam (10) end face, floor
(8) contact surface of bottom surface and raw steel Concrete Beam Reinforced (7) corresponding newly-increased reinforced concrete secondary beam (10) carries out dabbing processing and clear
Reason is clean；
(3) floor aperture: the part of corresponding newly-increased reinforced concrete secondary beam (10) opens up out along its length on floor (8) passes through
Wear two filling concrete holes (9) of its thickness direction, two filling concrete holes (9) are by newly-increased reinforced concrete secondary beam (10)
It is divided into three equal parts；
(4) muscle positioning, drilling are indulged: to newly-increased reinforced concrete secondary beam (10) longitudinal reinforcement on raw steel Concrete Beam Reinforced (7)
Installation site is positioned, and is drilled；
(5) it indulges muscle tapping: carrying out tapping using end of the screw-rolling machine to longitudinal reinforcement, longitudinal reinforcement end is processed into screw thread
Shape；
(6) it is segmented bar planting: the longitudinal reinforcement of newly-increased reinforced concrete secondary beam (10) is divided into the long section of vertical muscle (1) and vertical muscle short section
(2) two parts, by the longitudinal reinforcement of the long section of vertical muscle (1) one end by being passed through in the drilling in the raw steel Concrete Beam Reinforced (7) of side,
And it is fixed in end backing plate (3) and nut (4), enhance anchor force；By all stirrups of newly-increased reinforced concrete secondary beam (10)
(6) it is inserted in from the other end of the long section of vertical muscle (1), then by the longitudinal reinforcement of vertical muscle short section (2) one end by the raw steel of the other side
It is passed through in drilling in Concrete Beam Reinforced (7), and fixed in end backing plate (3) and nut (4), enhances anchor force；
(7) assembling reinforcement: the long section of vertical muscle (1) and vertical muscle short section (2) two parts are carried out within the scope of the reserved lap of splice in centre
Binding connection, the longitudinal reinforcement for forming newly-increased reinforced concrete secondary beam (10) are whole；Then stirrup (6) are determined by setting spacing
Framework of steel reinforcement is formed together with longitudinal reinforcement binding after good position；
(8) formwork: the template of newly-increased reinforced concrete secondary beam (10) is installed in floor (8) bottom；
(9) casting concrete: pouring for concrete is carried out simultaneously by two filling concrete holes (9).
2. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam according to claim 1, which is characterized in that
Further include following steps:
(10) hogging moment area Ban Ding reinforces: sticking carbon fibre cloth layer in the hogging moment region of floor (8) upper surface.
3. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam according to claim 2, which is characterized in that
In (10), carbon fibre cloth layer is by a plurality of carbon cloth one (5) of the direction equidistantly distributed along former floor (8) negative reinforcement and vertical
Two carbon cloths two of the directional spreding of former floor (8) negative reinforcement form, and are connected to two two lateral direction penetratings of carbon cloth more
The both ends of carbon cloth one (5)；The width of carbon cloth one (5) is 200mm, and the spacing of adjacent carbon cloth one (5) is
100mm。
4. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam according to any one of claims 1 to 3,
It is characterized in that, in (9), is poured using the pea gravel concreten of good fluidity, the demoulding after conserving to regulation age.
5. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam according to claim 4, which is characterized in that
In (6), the longitudinal reinforcement of the long section of muscle (1) or vertical muscle short section (2) end is indulged by wearing in the drilling in raw steel Concrete Beam Reinforced (7)
It is out-of-date to be filled with structure glue.
6. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam according to claim 5, which is characterized in that
In (4), hole is cleaned out after drilling.
7. a kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam according to claim 5, which is characterized in that
The diameter in filling concrete hole (13) is 8~10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811375997.3A CN109469349A (en) | 2018-11-19 | 2018-11-19 | A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811375997.3A CN109469349A (en) | 2018-11-19 | 2018-11-19 | A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam |
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| CN109469349A true CN109469349A (en) | 2019-03-15 |
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| CN201811375997.3A Pending CN109469349A (en) | 2018-11-19 | 2018-11-19 | A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259172A (en) * | 2019-06-25 | 2019-09-20 | 杭州聚源建筑设计有限公司 | Former prefabricated board transform the construction method of Bars In Poured Concrete Slab as |
| CN110576228A (en) * | 2019-07-30 | 2019-12-17 | 海盐铭宏精工科技有限公司 | Reinforcing bar loading attachment |
| CN110725562A (en) * | 2019-10-24 | 2020-01-24 | 杭州市建筑设计研究院有限公司 | Floor separation reinforcing method suitable for reinforcing large-load data room |
| CN111719885A (en) * | 2020-03-21 | 2020-09-29 | 东莞市大乘建筑工程技术有限公司 | Laminated concrete reinforced floor and construction process |
| CN115234025A (en) * | 2022-07-20 | 2022-10-25 | 中建八局西南建设工程有限公司 | Concrete floor thickening construction method |
| CN117822935A (en) * | 2024-01-16 | 2024-04-05 | 中建二局第三建筑工程有限公司 | Transformation structure and construction process for newly-added frame beam of existing flat slab |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259172A (en) * | 2019-06-25 | 2019-09-20 | 杭州聚源建筑设计有限公司 | Former prefabricated board transform the construction method of Bars In Poured Concrete Slab as |
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| CN110725562A (en) * | 2019-10-24 | 2020-01-24 | 杭州市建筑设计研究院有限公司 | Floor separation reinforcing method suitable for reinforcing large-load data room |
| CN111719885A (en) * | 2020-03-21 | 2020-09-29 | 东莞市大乘建筑工程技术有限公司 | Laminated concrete reinforced floor and construction process |
| CN115234025A (en) * | 2022-07-20 | 2022-10-25 | 中建八局西南建设工程有限公司 | Concrete floor thickening construction method |
| CN117822935A (en) * | 2024-01-16 | 2024-04-05 | 中建二局第三建筑工程有限公司 | Transformation structure and construction process for newly-added frame beam of existing flat slab |
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