CN110005169A - A kind of cracking resistance process with stressed seamless terrace - Google Patents
A kind of cracking resistance process with stressed seamless terrace Download PDFInfo
- Publication number
- CN110005169A CN110005169A CN201910293911.0A CN201910293911A CN110005169A CN 110005169 A CN110005169 A CN 110005169A CN 201910293911 A CN201910293911 A CN 201910293911A CN 110005169 A CN110005169 A CN 110005169A
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- Prior art keywords
- terrace
- steel strand
- strand wires
- laid
- cracking resistance
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The present invention relates to terrace technologies, the especially field that has higher requirements of terrace quality, it is exactly a kind of cracking resistance process with stressed seamless terrace, the present invention passes through stressed seamless terrace, using high-intensitive presstressed reinforcing steel (i.e. steel strand wires), certain prestressing force is established in ground floor structure by post stretching tensioned prestressing bar, enhances the cracking resistance of ground structure, and reduces the spacing at expansion joint.With post-tensioned pre-stressed technology, prevents the cutting seam of concrete, solve ground problem of Cracking, extend terrace service life.
Description
Technical field
The present invention relates to the fields that terrace technology, especially terrace quality have higher requirements, and are exactly a kind of tools
There is the cracking resistance process of stressed seamless terrace.
The prior art
On the one hand transporting equipment air cushion vehicle running region will consider driving safety, while consider air bag maintenance cost, right
High-level shelf fork truck running region and food processing workshop, since terrace to be considered cracking leads to bacteria breed, construction skill is wanted
Ask very high.
In existing technique, according to ground situation, concrete base uses different soil properties such as: element soil, dirt, landfill is simultaneously
It is tamped, different thick graded broken stones, compacting factor >=0.95, different concrete strengths is next laid with according to load requirement
Bed course, finally carry out concreting work, wherein match double-layer double-direction steel mesh in concrete.
Existing problems and disadvantages:
(1) concrete the characteristics influence such as is crept from chemical shrinkage of experiencing, dry and wet contractions, temperature deformation, ground, will cause ground
Differential settlement, situations such as leading to ground peeling, crack.
(2) ground cracking not only will affect use, also will increase the maintenance cost in later period.
(3) performance of concrete floor wear-resisting property and anti-heavy impact is poor, easy to wear, cracking.
Summary of the invention
The object of the present invention is to provide a kind of good manufacturability, the better performances of wear-resisting property and anti-heavy impact are not easy to grind
The cracking resistance process with stressed seamless terrace of damage and cracking.
The object of the present invention is achieved like this, a kind of cracking resistance process with stressed seamless terrace, special
Sign is: include at least following processing step:
(1) terrace is selected；
(2) basement process is carried out to selection terrace；
(3) rubble is carried out to ground treated terrace, sand bedding course is laid with；
(4) laying of PE film is carried out in rubble, sand bedding course laying；
(5) it carries out manufacturing template installation on PE thin film boundary；
(6) processing of anchorage and busting reinforcement construction and wall side column foot is fixed on its periphery after template installation；In template pair
It answers position to open up anchorage fixation hole and busting reinforcement, insulation blocking is carried out to wall side column foot, part sets stiffener；
(7) bellows is laid；
(8) steel strand wires are laid, steel strand wires are placed in tray and unpack to steel strand wires, cut under steel strand wires using angle grinder
Material；
(9) construction muscle is laid on steel strand wires；
(10) concreting is vibrated at the expansion joint of terrace, at busting reinforcement using hand-held vibrating head supplement；
(11) laser smoothing carries out laser smoothing construction using laser smoothing equipment, and laser smoothing equipment collection scraper is vibrated and whole
Flat Yu Yiti, leveling coverage rate up to 95% or more, can not overlay area sufficiently vibrated using vibrating head, it is whole using floating rule
It is flat；Absolute altitude must be checked using laser levelling system check at any time in flattening course；
(12) it is compacted, smoothes out, receives light and maintenance；
(13) tension steel strand carries out autofrettage；
(14) it is in the milk in the gap that terrace anchorage is formed.
The step (3) carries out rubble to ground treated terrace, sand bedding course laying includes:
Rubble carries out gradation, and same size classify, is removed containing sharp particle, sand mode is laid in, uses machine
Tool compacting；Slope is looked on four side of monolithic concrete；Reach basement process flatness requirement.
The step (4) carries out the laying of PE film in rubble, sand bedding course laying
It is laid with using two layers 0.3mmPE film, upper layer uses fusion joining process, and lower layer is using adhesive tape processing, and upper and lower level PE film is along connecing
Seam direction is vertically laid with；It checks that leakage is worn a little before casting concrete, wears to seal using adhesive tape if any leakage and mend.
The step (5) carries out manufacturing template installation on PE thin film boundary
Template is set according to designed elevation, with laser levelling system detection formwork elevation measuring, is adjusted at deviation using wedge block；It is all
Angle steel is set at expansion joint, steel strand wires drawknot is fixed.
The step (7) lays bellows
Steel strand wires are placed in bellows, is then laid with and places steel strand wires bellows, and laying places steel strand wires bellows using vertical and horizontal
Right-angled intersection is laid；Stirrup supporting is used at right-angled intersection, fixes infall, junction marine glue with tied silk or easy-to-draw band
Band Seal treatment；The pipe U-shaped connection of slip casting is used between two adjacent bellowss of anchorage fixing end, is carried out after the pipe U-shaped connection of slip casting
Encapsulation process.
The step (12) is compacted, smoothes out, receipts light and maintenance include:
The floating stage: having carried out slurry using hand-held finisher, and it is flat to carry out essence with floating rule；
It receives photophase: being compacted using drive type finisher, carry out smart levelling, the above-mentioned construction technology of repetition with floating rule again,
Until receiving light terminates；
The maintenance stage: using full water curing method, and being overlapped with film and covered, as discovery water shortage should mend immediately in curing cycle
Water.
Described step (13) tension steel strand, carrying out autofrettage includes:
Concreting complete 15 hours ± 30 points, carry out concrete slab base treatment, form removal takes out pre-buried plastics
Box installs anchor ring, intermediate plate at plastic casing, applies 25% prestressing force at anchor ring, intermediate plate；
When concrete strength reaches requirement, prestressing force is applied using the concrete C40 of higher-strength；
Control stress for prestressing value, using the 80% of steel strand wires ultimate strength standard value, with single tendon stretch jack by root tensioning；
In tensioning construction, the theoretic elongation of presstressed reinforcing steel and the allowable error of actual elongation value should be controlled when tensioning
Within ± 6%；
After the completion of tensioning work, using abrasive cutoff saw or the presstressed reinforcing steel of other machinery method cutting overlength part.
The step (14) is in the milk in the gap that terrace anchorage is formed,
After the completion of tension process, all presstressed reinforcing steels to be implemented to be in the milk, grouting is injected from one end, until slurry is full in pipeline,
There is no a gas bubbles left, cement slurry flows out from slurry output end and until consistency and mud jacking end are essentially identical；
It is the design requirement of 40MPa that slurry, which should meet shrinkage-void and 28 days intensity,；
Slurry will carry out fluidity testing and strength test；
After grouting material solidification, extra Grouting Pipe is cut off, blocks anchorage position to concordant using concrete mortar.
The invention has the advantages that
(1) a certain number of presstressed reinforcing steels are added in engineering method of the present invention in concrete in advance, and are existed in advance by post-tensioning pull technology
Certain tensile stress is established in floor structure, can overcome concrete itself chemical shrinkage, dry and wet contraction, temperature deformation, ground
The problem of Cracking that the characteristics such as creep influence.
(2) engineering method of the present invention can prevent the construction joint of concrete, only a small amount of or jointless, avoid terrace and open
It splits, reduces the maintenance cost in terrace later period, bring economic benefit for enterprise.
(3) engineering method of the present invention to using C35 or more concrete, guarantee its hardness and rigidity, have fine durability and
The performance of anti-heavy impact.
The present invention passes through post stretching using high-intensitive presstressed reinforcing steel (i.e. steel strand wires) by stressed seamless terrace
It draws presstressed reinforcing steel to establish certain prestressing force in ground floor structure, enhances the cracking resistance of ground structure, and reduce expansion joint
Spacing.With post-tensioned pre-stressed technology, prevents the cutting seam of concrete, solve ground problem of Cracking, extend terrace and use the longevity
Life.
Detailed description of the invention
Below with reference to concrete technology flow process figure, the invention will be further described:
Fig. 1 is process flow chart of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1, a kind of cracking resistance process with stressed seamless terrace, it is characterized in that: including at least such as
Lower processing step:
(1) terrace is selected；
(2) basement process is carried out to selection terrace；
(3) rubble is carried out to ground treated terrace, sand bedding course is laid with；
Rubble carries out gradation, removes containing sharp particle, uses mechanical ramming；
Sand mode is laid in；
Surface layer looks for slope mode: slope is looked on four side of monolithic concrete；
Smooth degree of layer requirement: with basement process flatness requirement.
(4) laying of PE film is carried out in rubble, sand bedding course laying；
Paving mode: being laid with using two layers of 0.3mmPE film, and upper layer uses fusion joining process, and lower layer is handled using adhesive tape, upper and lower level PE
Film is vertically laid with along seam direction；
It needs to check that leakage is worn a little before casting concrete, wears to seal using adhesive tape if any leakage and mend.
(5) production template installation is carried out on PE thin film boundary；
Template is set according to designed elevation, with laser levelling system detection formwork elevation measuring, is adjusted at deviation using wedge block；
Angle steel is set at all expansion joints, steel strand wires drawknot is fixed.
(6) processing of anchorage and busting reinforcement construction and wall side column foot is fixed on its periphery after template installation；In mould
Plate corresponding position opens up anchorage fixation hole and busting reinforcement, carries out insulation blocking to wall side column foot, part sets stiffener.
(7) bellows is laid；
The laying bellows includes:
A certain number of steel strand wires are placed in bellows, it is rear to be laid with；
It is laid using vertical and horizontal right-angled intersection；
Stirrup supporting is used at right-angled intersection, infall is fixed with tied silk or easy-to-draw band, at the adhesive waterproof tape closing of junction
Reason；
The pipe U-shaped connection of slip casting is used between two adjacent bellowss of anchorage fixing end, is sealed place after the pipe U-shaped connection of slip casting
Reason.
(8) steel strand wires are laid, steel strand wires are placed in tray and are unpacked to steel strand wires, twisted using angle grinder cutting of steel
Line blanking；Steel strand wires are used to enhance ground structure crack resistance, overcome traditional terrace problem of Cracking.
(9) construction muscle is laid on steel strand wires；When constructing the laying of muscle, bellows, anchorage, template and PE must not be damaged
Film；
(10) concreting:
Pour requirement: supplied frequency satisfaction pours requirement, and pumping length must not pour width lower than single storehouse；
It vibrates at the expansion joint of terrace, at busting reinforcement using hand-held vibrating head supplement.
(11) laser smoothing；
Laser smoothing construction is carried out using large laser levelling means, track needs to be laid with along casting track route；
Laser smoothing equipment integrates scraper, vibrates and flatten, leveling coverage rate up to 95% or more, can not overlay area adopt
It is sufficiently vibrated with vibrating head, is flattened using floating rule；
Absolute altitude must be checked using laser levelling system check at any time in flattening course.
(12) it is compacted, smoothes out, receives light and maintenance；
The floating stage: having carried out slurry using hand-held finisher, and it is flat to carry out essence with floating rule；
It receives photophase: being compacted using drive type finisher, carry out smart levelling, the above-mentioned construction technology of repetition with floating rule again,
Until receiving light terminates；
The maintenance stage: using full water curing method, and being overlapped with film and covered, as discovery water shortage should mend immediately in curing cycle
Water.
(13) tension steel strand carries out autofrettage；
15 hours or so progress concrete slab base treatments are completed in concreting, and form removal takes out pre-buried plastic casing,
Anchor ring, intermediate plate are installed at plastic casing, apply 25% prestressing force at anchor ring, intermediate plate；Concrete strength needs as early as possible when reaching requirement
Apply whole prestressing force (using the concrete C40 of higher-strength)；Control stress for prestressing value uses steel strand wires ultimate strength standard
The 80% of value, with single tendon stretch jack by root tensioning；
In tensioning construction, the theoretic elongation of presstressed reinforcing steel and the allowable error of actual elongation value should be controlled when tensioning
Within ± 6%；
After the completion of tensioning work, using abrasive cutoff saw or the presstressed reinforcing steel of other machinery method cutting overlength part, forbid using electricity
Arc cutting.
(14) it is in the milk in the gap that terrace anchorage is formed.
In time all presstressed reinforcing steels should be implemented to be in the milk after the completion of tension process, grouting is injected from one end, until in pipeline
Slurry is full, without gas bubbles left, cement slurry from slurry output end flow out and consistency and mud jacking end it is essentially identical until；
It is the design requirement of 40MPa that slurry, which should meet shrinkage-void and 28 days intensity,；
Slurry will carry out fluidity testing and strength test；
After grouting material solidification, extra Grouting Pipe is cut off, blocks anchorage position to concordant using concrete mortar.
The well-known components and common structure of component and the structure category industry that the present embodiment does not describe in detail or common hand
Section, does not describe one by one here.
Claims (8)
1. a kind of cracking resistance process with stressed seamless terrace, it is characterized in that: including at least following processing step:
Select terrace；
Basement process is carried out to selection terrace；
(3) rubble is carried out to ground treated terrace, sand bedding course is laid with；
(4) laying of PE film is carried out in rubble, sand bedding course laying；
(5) it carries out manufacturing template installation on PE thin film boundary；
(6) processing of anchorage and busting reinforcement construction and wall side column foot is fixed on its periphery after template installation；In template pair
It answers position to open up anchorage fixation hole and busting reinforcement, insulation blocking is carried out to wall side column foot, part sets stiffener；
(7) bellows is laid；
(8) steel strand wires are laid, steel strand wires are placed in tray and unpack to steel strand wires, cut under steel strand wires using angle grinder
Material；
(9) construction muscle is laid on steel strand wires；
(10) concreting is vibrated at the expansion joint of terrace, at busting reinforcement using hand-held vibrating head supplement；
(11) laser smoothing carries out laser smoothing construction using laser smoothing equipment, and laser smoothing equipment collection scraper is vibrated and whole
Flat Yu Yiti, leveling coverage rate up to 95% or more, can not overlay area sufficiently vibrated using vibrating head, it is whole using floating rule
It is flat；Absolute altitude must be checked using laser levelling system check at any time in flattening course；
(12) it is compacted, smoothes out, receives light and maintenance；
(13) tension steel strand carries out autofrettage；
(14) it is in the milk in the gap that terrace anchorage is formed.
2. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (3) carry out rubble to ground treated terrace, sand bedding course laying includes:
Rubble carries out gradation, and same size classify, is removed containing sharp particle, sand mode is laid in, uses machine
Tool compacting；Slope is looked on four side of monolithic concrete；Reach basement process flatness requirement.
3. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (4) in rubble, sand bedding course laying carry out PE film laying include:
It is laid with using two layers 0.3mmPE film, upper layer uses fusion joining process, and lower layer is using adhesive tape processing, and upper and lower level PE film is along connecing
Seam direction is vertically laid with；It checks that leakage is worn a little before casting concrete, wears to seal using adhesive tape if any leakage and mend.
4. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (5) carry out manufacturing template installation on PE thin film boundary and include:
Template is set according to designed elevation, with laser levelling system detection formwork elevation measuring, is adjusted at deviation using wedge block；It is all
Angle steel is set at expansion joint, steel strand wires drawknot is fixed.
5. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (7) lay bellows include:
Steel strand wires are placed in bellows, is then laid with and places steel strand wires bellows, and laying places steel strand wires bellows using vertical and horizontal
Right-angled intersection is laid；Stirrup supporting is used at right-angled intersection, fixes infall, junction marine glue with tied silk or easy-to-draw band
Band Seal treatment；The pipe U-shaped connection of slip casting is used between two adjacent bellowss of anchorage fixing end, is carried out after the pipe U-shaped connection of slip casting
Encapsulation process.
6. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (12) compacting, smooth out, receive light and maintenance and include:
The floating stage: having carried out slurry using hand-held finisher, and it is flat to carry out essence with floating rule；
It receives photophase: being compacted using drive type finisher, carry out smart levelling, the above-mentioned construction technology of repetition with floating rule again,
Until receiving light terminates；
The maintenance stage: using full water curing method, and being overlapped with film and covered, as discovery water shortage should mend immediately in curing cycle
Water.
7. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (13) tension steel strand, carry out autofrettage include:
Concreting complete 15 hours ± 30 points, carry out concrete slab base treatment, form removal takes out pre-buried plastics
Box installs anchor ring, intermediate plate at plastic casing, applies 25% prestressing force at anchor ring, intermediate plate；
When concrete strength reaches requirement, prestressing force is applied using the concrete C40 of higher-strength；
Control stress for prestressing value, using the 80% of steel strand wires ultimate strength standard value, with single tendon stretch jack by root tensioning；
In tensioning construction, the theoretic elongation of presstressed reinforcing steel and the allowable error of actual elongation value should be controlled when tensioning
Within ± 6%；
After the completion of tensioning work, using abrasive cutoff saw or the presstressed reinforcing steel of other machinery method cutting overlength part.
8. a kind of cracking resistance process with stressed seamless terrace according to claim 1, it is characterized in that: described
The step of (14) the gap that terrace anchorage is formed be in the milk,
After the completion of tension process, all presstressed reinforcing steels to be implemented to be in the milk, grouting is injected from one end, until slurry is full in pipeline,
There is no a gas bubbles left, cement slurry flows out from slurry output end and until consistency and mud jacking end are essentially identical；
It is the design requirement of 40MPa that slurry, which should meet shrinkage-void and 28 days intensity,；
Slurry will carry out fluidity testing and strength test；
After grouting material solidification, extra Grouting Pipe is cut off, blocks anchorage position to concordant using concrete mortar.
Priority Applications (1)
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| CN201910293911.0A CN110005169A (en) | 2019-04-12 | 2019-04-12 | A kind of cracking resistance process with stressed seamless terrace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293911.0A CN110005169A (en) | 2019-04-12 | 2019-04-12 | A kind of cracking resistance process with stressed seamless terrace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714591A (en) * | 2019-09-18 | 2020-01-21 | 北京银泰建构预应力技术股份有限公司 | Armor seam device suitable for whole terrace of prestressing force |
| CN110735513A (en) * | 2019-10-24 | 2020-01-31 | 安徽四建控股集团有限公司 | Construction method of prestressed terraces |
| CN111119445A (en) * | 2020-01-03 | 2020-05-08 | 云南维度装饰工程有限公司 | Construction method for building thin leveling layer based on prestress |
| CN111691640A (en) * | 2020-06-29 | 2020-09-22 | 海通建设集团有限公司 | Prestressed seamless terrace and construction method thereof |
| CN113107129A (en) * | 2021-04-20 | 2021-07-13 | 中国建筑第七工程局有限公司 | Super high-rise post-tensioning method bonded prestressed beamless floor construction method |
| CN113738062A (en) * | 2021-09-13 | 2021-12-03 | 中铁十八局集团有限公司 | Whole seamless terrace of prestressing force |
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| FR2663663B1 (en) * | 1990-06-25 | 1993-10-15 | Siplast Sa | UNDERCOAT FOR LAYING TILES OR TILES. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714591A (en) * | 2019-09-18 | 2020-01-21 | 北京银泰建构预应力技术股份有限公司 | Armor seam device suitable for whole terrace of prestressing force |
| CN110714591B (en) * | 2019-09-18 | 2021-06-01 | 北京银泰建构预应力技术股份有限公司 | Armor seam device suitable for whole terrace of prestressing force |
| CN110735513A (en) * | 2019-10-24 | 2020-01-31 | 安徽四建控股集团有限公司 | Construction method of prestressed terraces |
| CN111119445A (en) * | 2020-01-03 | 2020-05-08 | 云南维度装饰工程有限公司 | Construction method for building thin leveling layer based on prestress |
| CN111691640A (en) * | 2020-06-29 | 2020-09-22 | 海通建设集团有限公司 | Prestressed seamless terrace and construction method thereof |
| CN111691640B (en) * | 2020-06-29 | 2021-08-03 | 海通建设集团有限公司 | Prestressed seamless terrace and construction method thereof |
| CN113107129A (en) * | 2021-04-20 | 2021-07-13 | 中国建筑第七工程局有限公司 | Super high-rise post-tensioning method bonded prestressed beamless floor construction method |
| CN113738062A (en) * | 2021-09-13 | 2021-12-03 | 中铁十八局集团有限公司 | Whole seamless terrace of prestressing force |
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Application publication date: 20190712 |