CN202391150U - Strengthened structure of existing building floor - Google Patents
Strengthened structure of existing building floor Download PDFInfo
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- CN202391150U CN202391150U CN2011205279075U CN201120527907U CN202391150U CN 202391150 U CN202391150 U CN 202391150U CN 2011205279075 U CN2011205279075 U CN 2011205279075U CN 201120527907 U CN201120527907 U CN 201120527907U CN 202391150 U CN202391150 U CN 202391150U
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- building floor
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Abstract
The utility model discloses a strengthened structure of an existing building floor, which comprises original column grid structures (1) and an existing building floor (2). The strengthened structure of the existing building floor is characterized in that reversed cantilever beams (3) are arranged among the original column grid structures (1), the reversed cantilever beams (3) and the original column grid structures (1) are connected through bonded steel bars (4), a bottom plate (5) is constructed among the reversed cantilever beams (3), and an elevated level (6) is arranged between the bottom plate (5) and the existing building floor (2). In addition, when loads of horizontal members of an original structure are transferred to a newly-added structure to reduce the stress level of the original structure, the deformation of the original structure can be decreased, the width of a crack is decreased, and the crack even closes completely; a complete load bearing structure system is formed by adding beam slabs; the function of buildings can be changed effectively; the pipeline laying is facilitated by the aid of the elevated level; the effective using space is increased; and since the strengthening construction is performed to building floors with functions improved, the normal use of the existing building is not influenced.
Description
Technical field
The utility model relates to technical field of buildings, particularly relates to a kind of ruggedized construction of existing building flooring.
Background technology
In recent years, along with Chinese economic development, existing building structure of modification upsurge is in the ascendant.For existing building, often need to change the function of use of flooring, and the bearing capacity of existing structure often can not satisfy the demand after function changes, just must take suitable structural strengthening modification measures this moment.For example, when needs are set up the bath center in highrise building,, must take suitable reinforcement and strengthening measure to satisfy because the vertical load design value that common center, bathing pond bathing pool base plate is born is 2～3 times of normal public building floor.
Yet function change zone is usually located at the flooring more than two layers of existing building; Adopt the construction of conventional beam, plate bottom reinforcement means will certainly influence the normal use of building; Especially original decorations of the following floor in change zone, layout etc. are damaged inevitably, so should not adopt.
Summary of the invention
The utility model technical problem to be solved is to overcome the defective that the construction that has conventional reinforcement means now can influence the normal use of building; A kind of ruggedized construction of existing building flooring is provided; Be applicable to that the existing building floor changes to the bigger function of load increases such as bathing pool, reference room and changes, when satisfying the function modifications requirement, do not influence the normal use of each floor of existing building again.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
The ruggedized construction of the utility model existing building flooring; Comprise former post web frame 1 and existing building flooring 2; Be provided with anti-arm beam 31 of former post web frame; 1 of anti-arm beam 3 and former post web frame are connected through bar planting 4, and construction has base plate 5 in anti-arm beam 3 bottoms, and 2 on base plate 5 and existing building flooring are provided with Stilt layer 6.Anti-arm beam 3 can be built by overall time with base plate 5.
Further, in the above-mentioned ruggedized construction, the height of said Stilt layer 6 is 25～45mm, and this highly is preferably 30～40mm.
Preferably, in aforementioned ruggedized construction, said Stilt layer 6 adopts filled with mortar.Adopt the filled with mortar Stilt layer to have following advantage: (1) is made permanent bed die and is used: because the Stilt layer space is less; Template can't be laid and remove during the underplate concrete cast, must adopt to have corrosion-resistant, as not influence superstructure distortion material as being retained in the permanent formwork in the structure for a long time.Conventional template such as steel, timber material is difficult for being retained in the structure for a long time because of characteristics such as perishable poor durability, rigidity are big; And low grade mortar and concrete are all inorganic material; Good endurance, intensity are not high, deformability is strong; Its performance can satisfy above-mentioned requirements just, and evenly laying can be done permanent bed die use; (2) making built on stilts separation layer uses: under normal operating condition; When base plate produces amount of deflection under the upper load effect; The stressed back of filled with mortar layer absorbs its deformation energy rapidly through self-deformation and it dispersed to periphery; To intercept the transmission to the flooring of original structure of internal force that upper load produces, its action effect is similar to " sponge effect ".
Preferably, base plate 5 adopts the prestressing without bondn structure.
Compared with prior art, the utility model sets up base plate and is provided with Stilt layer on the flooring of existing building, and original flooring is bearing load not, and base plate adopts Non-cohesive Prestressing Force Technology, has following advantage:
(1) owing to be to carry out strengthening construction, do not influence the normal use of existing building, better solved a little less than the original structure arrangement of reinforcement, the reinforcing difficult problem that the beam slab bottom can't be carried out construction because of the limitation of conditions at the floor that function changes;
(2) with the load transfer of original structure horizontal member on the newly-increased structure to reduce the original structure stress level, can reduce the distortion of original structure, crack width diminishes even is closed fully;
(3) complete load supporting structure system of beam slab formation is set up in utilization, effectively changes the function of use of building, has characteristics such as overall performance is good, waterproofing and anti-leakage, and is especially very favourable to the bigger situation of local flow improvement load amplification;
(4) be suitable for the transformation of large span large spatial structure, Stilt layer can make things convenient for pipe installation, can increase effective usage space;
(5) with behind the traditional original structure floor plate reinforcement build concrete bathing pool structural concept more above that by laying bricks or stones and compare manufacturing cost saving about about 20%.
Description of drawings
Fig. 1 is the plane structure sketch map of the utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
The specific embodiment
With certain commercial building the bath center being set is example: certain commercial building is 28 story frame structures, and four floor faces need local floor load by original 3.5KN/m because of function change needs bathing pool to be set at 10～13 between striding
2Be increased to 9.0KN/m
2Bigger because of increasing load, improved requirement for bearing capacity can't be satisfied in the beam slab cross section of former flooring design at all, so need take corresponding measure such as floor plate reinforcement.Owing to be the market of fitting up in the normal business that finishes below four layers,, adopt technical scheme of the present invention to set up beam slab and plate is applied prestressing force in addition, obtain good result at the regional flooring of bathing pool so can't realize implementing to reinforce by the beam slab bottom.Normally used 4 years behind this project strengthening reconstruction, the user is reflected well.Concrete reinforcement means is following;
1, detection-phase
Carry out to intend transforming regional member (being mainly vertical member) that sectional dimension, arrangement of reinforcement are arranged, concrete strength detects, for design provides data target accurately and reliably.
Transform regional former colum network size 7800*12000mm, girder section size 300*7000mm, thickness of slab 120mm, strength grade of concrete C40.
2, the design stage
According to bathing pool structural configuration and newly-increased payload values by the measurement technology index of connecting elements carry out the Axial Pressure Ratio of Framework Comluns checking computations, the reinforcing design and the node check of setting up internal force and the Calculation of Deflection of beam, big plate prestressing without bondn computational analysis, connecting elements calculate.
As depicted in figs. 1 and 2, ruggedized construction comprises former post web frame 1 and existing building flooring 2, sets up four anti-arm beams 31 of former post web frame; 1 of anti-arm beam 3 and former post web frame are connected through bar planting 4; Construction has base plate 5 in anti-arm beam 3 bottoms, and 2 on base plate 5 and existing building flooring are provided with Stilt layer 6, and the height of Stilt layer 6 is 35mm; The employing cement mortar is filled, and in base plate 5, is provided with prestress wire 7.
The sectional dimension 300*750mm of anti-arm beam 3.Base plate 5 is the bathing pool base plate, is of a size of 6500*7800mm, thick 180mm.The strength grade of concrete of anti-arm beam 3 and base plate 5 is C45, adopts overall time to build.Anti-arm beam 3 top design are the 350*180mm concrete-pool-wall.The bathing pool base plate adopts the prestressing without bondn construction technology, control stress for prestressing 0.7fptk, and single prestress wire 7 maximum stretching forces are 180.98kn.Because the increase of load has changed the original structure distribution of internal force, cause the styletable bending moment to increase, so the frame column node of former post web frame is taked to reinforce.
3, the construction stage
3.1 post joint reinforcing
Because the increase of floor load; Changed the original structure distribution of internal force; Cause the styletable bending moment to increase; So consolidation process is carried out in the main force part of frame column node, the reinforcement means that the visual field condition of its concrete grammar adopts current specifications to allow is implemented, and increases method of sections, encased steel method, external prestressing method etc. like concrete.
3.2 set up the beam slab construction
At first lay one deck 35mm screed as the Stilt layer bed die of holding concurrently, adopt and plant the reinforcing bar method and on former post web frame, implants and increase beam steel newly, construction technology process at flooring:
Bar planting → newly-increased anti-arm beam and top pool wall reinforcing bar binding → side template → board prestress reinforcement placement → beam slab concrete primary concreting.
3.3 prestressed stretch-draw
In order further to have increased the carrying of base plate, base plate adopts prestressed reinforced concrete construction.After treating that newly placed concrete reaches design strength, in beam one side the pre-buried prestressed reinforcement of base plate is carried out stretch-draw, stretch-draw is controlled according to designing requirement.Splash crack and distortion situation in the stretching process in real time.
The check of 4 entities
Construction is carried out bearingtest according to function of use and load designing requirement after accomplishing, and stage loading is loaded onto design load, observes and write down amount of deflection and the infiltration situation under the loads at different levels.
Claims (5)
1. the ruggedized construction of an existing building flooring; Comprise former post web frame (1) and existing building flooring (2); It is characterized in that: between former post web frame (1), be provided with anti-arm beam (3); Be connected through bar planting (4) between anti-arm beam (3) and former post web frame (1), construction has base plate (5) in anti-arm beam (3) bottom, is provided with Stilt layer (6) between anti-arm beam (3) and base plate (5) and existing building flooring (2).
2. according to the ruggedized construction of the said existing building flooring of claim 1, it is characterized in that: the height of said Stilt layer (6) is 25～45mm.
3. according to the ruggedized construction of the said existing building flooring of claim 2, it is characterized in that: the height of said Stilt layer (6) is 30～40mm.
4. according to the ruggedized construction of each said existing building flooring of claim 1 to 3, it is characterized in that: said Stilt layer (6) adopts filled with mortar.
5. according to the ruggedized construction of the said existing building flooring of claim 1, it is characterized in that: said base plate (5) adopts the prestressing without bondn structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205279075U CN202391150U (en) | 2011-12-16 | 2011-12-16 | Strengthened structure of existing building floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205279075U CN202391150U (en) | 2011-12-16 | 2011-12-16 | Strengthened structure of existing building floor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202391150U true CN202391150U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205279075U Expired - Fee Related CN202391150U (en) | 2011-12-16 | 2011-12-16 | Strengthened structure of existing building floor |
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| Country | Link |
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| CN (1) | CN202391150U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484512A (en) * | 2014-10-13 | 2016-04-13 | 湖南征驰工程技术咨询有限公司 | Method of repairing building cracks |
-
2011
- 2011-12-16 CN CN2011205279075U patent/CN202391150U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484512A (en) * | 2014-10-13 | 2016-04-13 | 湖南征驰工程技术咨询有限公司 | Method of repairing building cracks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20141216 |
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| EXPY | Termination of patent right or utility model |