CN109469350A - A kind of floor strengthening reconstruction method for adding steel secondary beam - Google Patents
A kind of floor strengthening reconstruction method for adding steel secondary beam Download PDFInfo
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- CN109469350A CN109469350A CN201811376813.5A CN201811376813A CN109469350A CN 109469350 A CN109469350 A CN 109469350A CN 201811376813 A CN201811376813 A CN 201811376813A CN 109469350 A CN109469350 A CN 109469350A
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- floor
- secondary beam
- end plate
- steel secondary
- beam body
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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)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
A kind of floor strengthening reconstruction method for adding steel secondary beam, comprising the following steps: (1) secondary beam positions: positioning to newly-increased steel secondary beam；(2) interface dabbing: dabbing processing is carried out to the contact surface of newly-increased steel secondary beam and floor, Vierendeel girder and is cleaned out；(3) it makes newly-increased steel secondary beam: newly-increased steel secondary beam being split as beam body and two end plates make；(4) position of header expansion bolt hole positioning drilling: is calibrated on the corresponding position of Vierendeel girder；(5) reinforced cementitious: the structure glue mixed with cement is uniformly completely spread on the beam body edge of a wing and the end plate edge of a wing；(6) end plate is installed: two end plates being respectively arranged on the Vierendeel girder of opposite sides by expansion bolt；(7) mounting rail body: the both ends of beam body are fixedly connected with two end plates respectively by connection bolt.This method simple process, short construction period, and construction cost is low, can effectively improve the bearing capacity of floor, it can be quickly to the floor progress strengthening reconstruction for having occurred and that deformation.
Description
Technical field
The invention belongs to structure construction technology fields, and in particular to a kind of floor strengthening reconstruction method for adding steel secondary beam.
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 the rigidity and stability decline of structure, less serious case influences the normal use of floor, and when serious floor can lose and use function
Energy, damaged even slump, cause safety accident.
Particularly, some floors are since span is big and plate thickness is relatively thin, and the deformations such as cracking, bending occur for floor, so that floor
Normal use be severely impacted.Equally, the change using function in some rooms also results in the load that floor is born
Increase, be not able to satisfy existing demand so as to cause former design bearing capacity, the security of the lives and property of people is caused and is seriously threatened, needs
Floor is reinforced by way of adding secondary beam.
In these cases, it requires the safety to original floor accurately to be identified, and takes appropriate measures
Reasonable transformation is carried out to reinforce to meet bearing capacity, stability requirement.It removes former floor and resets new floor in the original location,
There is problems long in time limit, at high cost.In order to guarantee that room can continue to using preventing from asking in load bearing process
Topic, it is necessary to ensure that floor has enough bearing capacities, need to study invent a kind of construction technology is easy, and the period is short, speed is fast, at
This low Reinforcement method carries out strengthening reconstruction to the floor for having occurred and that deformation.In conclusion exploitation floor Reinforcement
New way, realize quick to floor, efficient, economically strengthening reconstruction, have great importance.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of floor strengthening reconstruction sides for adding steel secondary beam
Method, this method simple process, short construction period, and construction cost is low, can effectively improve the bearing capacity of floor, it can be quickly to
Floor through deforming carries out strengthening reconstruction.
To achieve the goals above, the present invention provides a kind of floor strengthening reconstruction method for adding steel secondary beam, including following
Step:
(1) secondary beam positions: positioning to newly-increased steel secondary beam；
(2) interface dabbing: dabbing processing is carried out to the contact surface of newly-increased steel secondary beam and floor, Vierendeel girder and is cleaned out；
(3) it makes newly-increased steel secondary beam: newly-increased steel secondary beam being split as beam body and two end plates make, and in end plate
The header expansion bolt hole connecting with Vierendeel girder is opened up out on the end plate edge of a wing, is opened up out on the end plate web of end plate and beam body
The end plate connection hole of beam body web connection；
(4) position of header expansion bolt hole positioning drilling: is calibrated on the corresponding position of Vierendeel girder；
(5) reinforced cementitious: on the beam body edge of a wing of beam body and the contact surface of soffit, the end plate edge of a wing of end plate and frame
The structure glue mixed with cement is uniformly completely spread on the contact surface of beam；
(6) end plate is installed: end plate compression being bonded on Vierendeel girder using the structure glue mixed with cement, and passes through expanding screw
Two end plates are respectively arranged on the Vierendeel girder of opposite sides by bolt；
(7) mounting rail body: beam body compression is bonded on soffit using the structure glue mixed with cement, and passes through connection
The both ends of beam body are fixedly connected with two end plates by bolt respectively.
The method of steel secondary beam is added in the present invention, thus it is possible to vary the Path of Force Transfer of floor improves the bearing capacity of floor；Pass through
The concrete dabbing of newly-increased steel secondary beam and contact surface be ensure that into the cohesive force between newly-increased steel secondary beam and original structure；By in beam
The beam body edge of a wing top surface of body completely spreads the structure glue mixed with cement, strengthens between original reinforced concrete structure and newly-increased steel secondary beam
Globality, while using structure glue as buffering, avoid the destruction for newly increasing steel secondary beam to concrete in former floor and beam；
Steel secondary beam is divided into three sections of installations by this method, and work progress can be made convenient and simple, can be more convenient for dismounting, and can solve construction site sky
Between it is narrow, pipeline is more, whole newly increase the problem that steel secondary beam can not be mounted directly etc..By being pasted in floor top hogging moment area
Carbon cloth ensure that tensile capacity of the floor at newly-increased steel secondary beam.Easy construction of the present invention, short time limit, speed is fast, is convenient for
Dismounting, it is at low cost.
It further, further include walking as follows for the strength of connection between reinforcing beam body and floor, between end plate and Vierendeel girder
It is rapid:
(8) it mends structure glue: checking the bonding feelings of structure glue between beam body and soffit, end plate and Vierendeel girder contact surface
Condition fills up vacancy.By filling up to structure glue vacancy, original reinforced concrete structure is further enhanced
With the adhesion strength and globality of newly-increased steel secondary beam.
Further, further include following steps in order to enhance the hogging moment bearing capacity of floor:
(9) hogging moment area Ban Ding reinforces: sticking carbon fibre cloth layer in the hogging moment region of floor upper surface.
Further, in (1), the span according to floor carries out unwrapping wire positioning to newly-increased steel secondary beam installation site.
As a preference, mixed with the structure glue of cement with a thickness of 8~15mm in (5).
Further, it is assembled to be more convenient for, in (6), first loads onto an expansion bolt check and correction bolt hole position, then penetrate
One expansion bolt, then two expansion bolts are hammered to scheduled buried depth, then with expansion bolt is tightened, there are tight during being somebody's turn to do
Gu surplus, without expansion bolt is fastened to bottom.
Further, it is assembled to be more convenient for, in (7), the beam body edge of a wing at beam body both ends is first carried on a shoulder pole to the end plate abdomen in end plate
On plate, and it is directed at the end plate of junction and the connecting hole of beam body, loads onto all connection bolts between beam body and end plate, then install
All remaining expansion bolts between end plate and Vierendeel girder, tighten the connection bolt between beam body and end plate, then by end plate and frame
Expansion bolt between beam is fastened to bottom.
Further, in order to preferably enhance the strength of connection of newly-increased steel secondary beam and floor, in (9), carbon fibre cloth layer by
Along two of the directional spreding of a plurality of carbon cloth one and vertical former floor negative reinforcement of the direction equidistantly distributed of former floor negative reinforcement
Carbon cloth two forms, and is connected to two two lateral direction penetratings of carbon cloth the both ends of a plurality of carbon cloth one；Carbon cloth
One width is 200mm, and the spacing of adjacent carbon cloth one is 100mm.
Further, end plate connection hole is slotted hole.The setting of slotted hole solves the newly-increased steel secondary beam size in construction site and deposits
The problem of deviation can not be installed accurately, achieve the purpose that adjust steel secondary beam scale error.
The present invention is easy for construction simple, and speed is fast, high-efficient, and easy to carry, dismounting can reasonably, effectively change
The Path of Force Transfer of former floor increases the bearing capacity of floor, extends the service life of floor, guarantees the safety of lives and properties, compared with
It solves well since floor span is big or changes bearing capacity of floor slab caused by load increase caused by service function of the rooms
Insufficient bring safety problem.
Detailed description of the invention
Fig. 1 is the top view that the floor strengthening reconstruction method of newly-increased steel secondary beam is added in the present invention；
Fig. 2 be Fig. 1 in I-I to cross-sectional view；
Fig. 3 is the structural schematic diagram of end plates of the present invention；
Fig. 4 is the left view of Fig. 3；
Fig. 5 is the assembling schematic diagram for increasing steel secondary beam and floor in the present invention newly；
Fig. 6 is the assembling schematic diagram for increasing steel secondary beam and Vierendeel girder in the present invention newly.
In figure: 1, the end plate edge of a wing, 2, end plate web, 3, the beam body edge of a wing, 4, beam body web, 5, mixed with the gum deposit of cement, 6,
Header expansion bolt hole, 7, end plate connection hole, 8, expansion bolt, 9, connection bolt, 10, carbon cloth one, 11, floor, 12, end
Plate, 13, beam body, 14, Vierendeel girder, 15, frame column.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, original form bracing structure is by being located at four frame columns 15 of lower part quadrangle, connecting adjacent two frames
Vierendeel girder 14 between 15 upper end of trestle forms, and a newly-increased steel secondary beam is added under the floor 11, and detailed process is as follows:
As shown in Figures 2 to 6, a kind of floor strengthening reconstruction method for adding steel secondary beam, comprising the following steps:
(1) secondary beam positions: positioning to newly-increased steel secondary beam；
(2) interface dabbing: dabbing processing is carried out to the contact surface of newly-increased steel secondary beam and floor 11, Vierendeel girder 14 and is cleared up dry
Only, to increase the globality for increasing 11 structure of steel secondary beam and former floor newly；
(3) it makes newly-increased steel secondary beam: newly-increased steel secondary beam being split as beam body 13 and two end plates 12 make, and is being held
The header expansion bolt hole 6 connecting with Vierendeel girder 14 is opened up out on the end plate edge of a wing 1 of plate 12, on the end plate web 2 of end plate 12
Open up out the end plate connection hole 7 connecting with the beam body web 4 of beam body 13；
(4) position of header expansion bolt hole 6 positioning drilling: is calibrated on the corresponding position of Vierendeel girder 14；
(5) reinforced cementitious: on the beam body edge of a wing 3 of beam body 13 and the contact surface of 11 bottom surface of floor, the end plate wing of end plate 12
The structure glue 5 mixed with cement is uniformly completely spread on the contact surface of edge 1 and Vierendeel girder 14；In this way, original armored concrete can be reinforced
Globality between structure and newly-increased steel secondary beam, while structure glue avoids newly-increased steel secondary beam and makes to Vierendeel girder 14 as buffering
At destruction.
(6) end plate is installed: the compression of end plate 12 being bonded on Vierendeel girder 14 using the structure glue 5 mixed with cement, and is passed through
Two end plates 12 are respectively arranged on the Vierendeel girder 14 of opposite sides by expansion bolt 8；
(7) mounting rail body: the compression of beam body 13 is bonded on 11 bottom surface of floor using the structure glue 5 mixed with cement, and is led to
Connection bolt is crossed to be fixedly connected at the both ends of beam body 13 with two end plates 12 respectively.Steel secondary beam will be newly increased and be divided into two ends
Plate 12,13 3 sections of beam body installed, easy for construction simple, it is narrow to can effectively solve construction site space for easy to carry and dismounting
Small, the inconvenient problem of construction such as pipeline is more, whole secondary beam can not be mounted directly.
Further include following steps:
(8) it mends structure glue: checking structure glue between beam body 13 and 14 contact surface of 11 bottom surface of floor, end plate 12 and Vierendeel girder
Bonding situation fills up vacancy.By filling up to structure glue vacancy, original reinforced concrete is further enhanced
The adhesion strength and globality of soil structure and newly-increased steel secondary beam；
Further include following steps:
(9) hogging moment area Ban Ding reinforces: carbon fibre cloth layer is sticked in the hogging moment region of 11 upper surface of floor, to be used to increase
The hogging moment bearing capacity of strong floor 11.In (9), carbon fibre cloth layer is by the direction equidistantly distributed along former 11 negative reinforcement of floor
Two carbon cloths two composition of the directional spreding of 11 negative reinforcement of a plurality of carbon cloth 1 and vertical former floor, two carbon cloths
Two lateral direction penetratings it is connected to the both ends of a plurality of carbon cloth 1；The width of carbon cloth 1 is 200mm, adjacent carbon fiber
The spacing for tieing up cloth 1 is 100mm.
In (1), the span according to floor 11 carries out unwrapping wire positioning to newly-increased steel secondary beam installation site.
Mixed with the structure glue of cement 5 with a thickness of 8~15mm in (5).
In (6), first loads onto an expansion bolt 8 and proofread bolt hole position, then penetrate an expansion bolt 8, then hammer
Two expansion bolts 8 are to scheduled buried depth, as a preference, hammered using hammer, then with tightening expansion bolt 8,
As a preference, being tightened using double offset ring spanner, there are fastening surpluses during being somebody's turn to do, without expansion bolt 8 to be fastened to
Bottom, to be conveniently adjusted the position of end plate 12 when this following mounting rail body 13.
In (7), first the beam body edge of a wing 3 at 13 both ends of beam body is carried on a shoulder pole on the end plate web 2 of end plate 12, and be directed at junction
End plate 12 and beam body 13 connecting hole, load onto all connection bolts between beam body 13 and end plate 12, then install end plate 12 with
All remaining expansion bolts 8 between Vierendeel girder 14, tighten the connection bolt between beam body 13 and end plate 12, then by end plate 12 and frame
The expansion bolt 8 set a roof beam in place between 14 is fastened to bottom, should during, first fix bolt head with open-end wrench, then use double offset ring spanner
Tightening nuts.
End plate connection hole 7 is slotted hole.The setting of slotted hole solves the newly-increased steel secondary beam size in construction site, and there are deviations
The problem of can not accurately installing.
Present invention is particularly suitable for since floor span is big, changes caused by load increase caused by service function of the rooms
Lack of support, cracking caused by floor, deflection deformation, at the same construction site pipeline is more, narrow space, newly-increased secondary beam can not
The floor strengthening reconstruction that one step is installed in place etc..
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 (9)
1. a kind of floor strengthening reconstruction method for adding steel secondary beam, which comprises the following steps:
(1) secondary beam positions: positioning to newly-increased steel secondary beam；
(2) interface dabbing: dabbing processing is carried out to the contact surface of newly-increased steel secondary beam and floor (11), Vierendeel girder (14) and is cleared up dry
Only；
(3) it makes newly-increased steel secondary beam: newly-increased steel secondary beam being split as beam body (13) and two end plates (12) make, and is being held
The header expansion bolt hole (6) connecting with Vierendeel girder (14) is opened up out on the end plate edge of a wing (1) of plate (12), at the end of end plate (12)
The end plate connection hole (7) connecting with the beam body web (4) of beam body (13) is opened up out on plate web (2)；
(4) position of header expansion bolt hole (6) positioning drilling: is calibrated on the corresponding position of Vierendeel girder (14)；
(5) reinforced cementitious: on the beam body edge of a wing (3) of beam body (13) and the contact surface of floor (11) bottom surface, the end of end plate (12)
The structure glue (5) mixed with cement is uniformly completely spread on the contact surface of the plate edge of a wing (1) and Vierendeel girder (14)；
(6) end plate is installed: end plate (12) being compressed using the structure glue (5) mixed with cement and are bonded on Vierendeel girder (14), and are led to
It crosses expansion bolt (8) two end plates (12) are respectively arranged on the Vierendeel girder (14) of opposite sides；
(7) mounting rail body: being compressed beam body (13) using the structure glue (5) mixed with cement and be bonded on floor (11) bottom surface, and
The both ends of beam body (13) are fixedly connected with two end plates (12) respectively by connection bolt.
2. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 1, which is characterized in that further include as
Lower step:
(8) structure glue is mended: structure between inspection beam body (13) and floor (11) bottom surface, end plate (12) and Vierendeel girder (14) contact surface
The bonding situation of glue, vacancy is filled up.
3. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 2, which is characterized in that further include as
Lower step:
(9) hogging moment area Ban Ding reinforces: sticking carbon fibre cloth layer in the hogging moment region of floor (11) upper surface.
4. a kind of floor strengthening reconstruction method for adding steel secondary beam according to any one of claims 1 to 3, feature exist
In in (1), the span according to floor (11) carries out unwrapping wire positioning to newly-increased steel secondary beam installation site.
5. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 4, which is characterized in that in (5)
Mixed with cement structure glue (5) with a thickness of 8~15mm.
6. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 5, which is characterized in that in (6),
Expansion bolt (8) check and correction bolt hole position is first loaded onto, then penetrates an expansion bolt (8), then hammer two expansion bolts
(8) to scheduled buried depth, then with tightening expansion bolt (8), should during there are fastening surplus, without by expansion bolt (8)
It is fastened to bottom.
7. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 6, which is characterized in that in (7),
First the beam body edge of a wing (3) at beam body (13) both ends is carried on a shoulder pole on the end plate web (2) of end plate (12), and is directed at the end plate of junction
(12) with the connecting hole of beam body (13), all connection bolts between beam body (13) and end plate (12) are loaded onto, then end plate is installed
(12) all remaining expansion bolts (8) between Vierendeel girder (14), tighten the connection bolt between beam body (13) and end plate (12),
The expansion bolt (8) between end plate (12) and Vierendeel girder (14) is fastened to bottom again.
8. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 3, which is characterized in that in (9),
Carbon fibre cloth layer by the direction equidistantly distributed along former floor (11) negative reinforcement a plurality of carbon cloth one (10) and vertical former floor
(11) two carbon cloths two composition of the directional spreding of negative reinforcement, is connected to a plurality of carbon fiber to two two lateral direction penetratings of carbon cloth
Tie up the both ends of cloth one (10)；The width of carbon cloth one (10) is 200mm, and the spacing of adjacent carbon cloth one (10) is
100mm。
9. a kind of floor strengthening reconstruction method for adding steel secondary beam according to claim 7, which is characterized in that end plate connection
Hole (7) is slotted hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811376813.5A CN109469350A (en) | 2018-11-19 | 2018-11-19 | A kind of floor strengthening reconstruction method for adding steel secondary beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811376813.5A CN109469350A (en) | 2018-11-19 | 2018-11-19 | A kind of floor strengthening reconstruction method for adding steel secondary beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109469350A true CN109469350A (en) | 2019-03-15 |
Family
ID=65673049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811376813.5A Pending CN109469350A (en) | 2018-11-19 | 2018-11-19 | A kind of floor strengthening reconstruction method for adding steel secondary beam |
Country Status (1)
| Country | Link |
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| CN (1) | CN109469350A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351461A (en) * | 2016-09-21 | 2017-01-25 | 天津市建筑设计院 | Reinforcement method and structure for improving post-installed anchorage shear bearing capacity of concrete beam |
| CN207934485U (en) * | 2018-01-19 | 2018-10-02 | 山西大学 | A kind of shear wall structure floor reinforcing connection structure |
-
2018
- 2018-11-19 CN CN201811376813.5A patent/CN109469350A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351461A (en) * | 2016-09-21 | 2017-01-25 | 天津市建筑设计院 | Reinforcement method and structure for improving post-installed anchorage shear bearing capacity of concrete beam |
| CN207934485U (en) * | 2018-01-19 | 2018-10-02 | 山西大学 | A kind of shear wall structure floor reinforcing connection structure |
Non-Patent Citations (2)
| Title |
|---|
| 刁鹏展: "某酒店改造加固设计及方案探讨", 《山西建筑》 * |
| 张家宏等: "某抽水蓄能电站地下厂房结构加固设计", 《中国水利水电科学研究院学报》 * |
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