CN110005110A - A kind of prestressing force laminated floor slab construction method for exempting from support - Google Patents
A kind of prestressing force laminated floor slab construction method for exempting from support Download PDFInfo
- Publication number
- CN110005110A CN110005110A CN201910321537.0A CN201910321537A CN110005110A CN 110005110 A CN110005110 A CN 110005110A CN 201910321537 A CN201910321537 A CN 201910321537A CN 110005110 A CN110005110 A CN 110005110A
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- CN
- China
- Prior art keywords
- bottom plate
- precast prestressed
- reinforcing bar
- floor slab
- exempting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
- E04C5/0631—Reinforcing mats combined with separate prefabricated reinforcement cages or girders
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of prestressing force laminated floor slab construction methods for exempting from support, mainly for by studying large span flooring superimposed sheet, a kind of large-span prestressed laminated floor slab is invented, by forming composite structure with one or multi-channel secondary beam in work progress, solve the cumbersome process such as traditional floorboard assembly, formwork, the support of setting bottom, piece processing, it realizes in construction without setting up form bracing system, effectively shortens and the construction period and save construction cost.
Description
Technical field
The present invention relates to building structure technology field, specially a kind of prestressing force laminated floor slab construction method for exempting from support.
Background technique
Assembled architecture has many advantages, such as that industrialized level is high, speed of application is fast, avoids wet construction.In recent years, with me
State is to the raising of green construction, energy-saving and emission-reduction requirement and being substantially improved for labour market price, prefabricated concrete structure
It is largely promoted and applied in national each province.Floor starts to be changed into bottom plate from traditional integral cast-in-situ or factory are integral prefabricated
The laminated floor slab of prefabrication, overlapping layers field cast-in-place.
Compared with traditional integral cast-in-situ floor, superimposed sheet reduces the dosage of construction site formwork and scaffold, improves
Construction efficiency meets the energy-saving and environment-friendly requirement of national green；Compared with the integral prefabricated floor of tradition, the superior globality of superimposed sheet
And anti-seismic performance, it effectively prevents leakage and the problems such as crack, meets the requirement of building safety, applicability and durability.Cause
This, superimposed sheet is widely used in construction projects.
Architectural engineering frequently with superimposed sheet mainly have template superimposed sheet, truss bars concrete folding plate and prefabricated with ribbing
Prestressed concrete overlapped slab.The superimposed sheet of above-mentioned three types finds that there are one in production, transport, construction and use process
The problem of determining degree or defect.
(1) the precast prestressed bottom plate bending resistance of plate superimposed sheet and anti-folding rigidity are lower, hold in transport and hoisting process
Frangibility applies man-hour requirement and closeer temporary support is arranged, and the cohesive force between new-old concrete is lower, and floow load is larger
When superposed surfaces it is easy to crack, and be widely used in short span field.
(2) the precast prestressed base plate thickness of regular reinforcement truss superimposed sheet reaches 60mm~80mm, cause self weight compared with
Greatly, it is difficult to the case where being applied to compared with large span, and when installation, need arrangement multiple tracks temporarily to prop up below precast prestressed bottom plate
Support, and be widely used in short span field.
(3) prefabricated prestressed concrete overlapped slab with ribbing is to add concrete rib or steel plate on precast prestressed bottom plate top
Rib.Concrete rib or steel plate rib improve the out of plane stiffness of precast prestressed bottom plate, but when use concrete rib, there are formworks
Complexity, rib and bottom plate need to construct in two times, and production efficiency is low, and there are construction joint between rib and bottom plate, lead to prefabricated pre- answer
The globality of power bottom plate is poor；When using steel plate rib, in lifting, transport and installation process, steel web is easily by precast prestressed bottom
Plate, which is cut, to be split, and causes product service life short.In addition, the hole on two kinds of floors is discontinuous, when practice of construction, build in corner regions
The pipe inserting in domain has difficulties, and is widely used in short span field.
Therefore, at this stage it is necessary to research and develop it is a kind of exempt from support prestressing force laminated floor slab construction method, can satisfy greatly across
It spends, exempt from support, the requirement that highly-safe, globality is good, site operation is high-efficient.
Summary of the invention
The purpose of the present invention is to provide a kind of prestressing force laminated floor slab construction method for exempting from support, more existing overlapping buildings
Board construction method is more stable, convenient, high-efficient, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of prestressing force laminated floor slab construction for exempting from support
Method, comprising the following steps:
Step 1: producing precast prestressed steel bar girder bottom plate in the factory, and wherein steel bar girder is away from precast prestressed bottom plate plate
Side is not more than 300mm, and spacing is not more than 600mm, and steel bar girder lower edge reinforcing bar is embedded to prefabricated board depth and is not less than 35mm, reinforcing bar purlin
The frame reinforcing bar that winds up exposes the height of prefabricated board not less than 45mm, the concrete protective of wind up reinforcing bar and the lower edge reinforcing bar of steel bar girder
Thickness degree is not less than 15mm；
Step 2: precast prestressed bottom plate both ends are respectively set for transport to construction site, the assembled precast prestressed bottom plate of lifting
Secondary beam is additionally provided between girder top, two girders, precast prestressed lower surface of base plate middle position is supported by secondary beam；
Step 3: one-piece casting concrete after the completion of assembled, maintenance reach design strength；
Step 4: bonding piece using the glue of special Self-Shrinkage Property or is filled up using high-strength mortar joint, and system is applied
Work is completed.
Preferably, precast prestressed plate upper surface is provided with overlapping layers, the precast prestressed bottom in the step 1
Be connected between plate and overlapping layers by the steel bar girder of prestress baseboard, the length and width of the precast prestressed bottom plate according to
Design determines and should meet the requirement of modular design.
Preferably, precast prestressed plate upper surface is the specification for meeting concave-convex depth and being not less than 4mm in the step 1
The natural rough surface or impression rough surface of roughness requirements.
Preferably, precast prestressed base plate interior is equally spaced cross direction profiles steel in the width direction in the step 1
Muscle, the precast prestressed base plate interior are equally spaced deformed bar along its length, and the deformed bar is located at cross
Above to distribution bar, spaced set has multiple tracks steel bar girder in the width direction on the precast prestressed bottom plate top.
Preferably, steel bar girder includes wind up reinforcing bar, lower edge reinforcing bar and lattice reinforcing bar, the lower edge steel in the step 1
Muscle and lattice reinforcing bar are respectively two, and the lattice reinforcing bar is waveform bending, and the upper inflection point of the every lattice reinforcing bar is equal
With the reinforcement welding that winds up, with lower edge reinforcement welding, the reinforcing bar that winds up is higher than prefabricated pre- for the lower inflection point of the lattice reinforcing bar
The upper surface of stress bottom plate and lower than overlapping layer height, it is interior and be fixed on prefabricated that the lower edge reinforcing bar is located at precast prestressed bottom plate
On deformed bar inside prestress baseboard.
Preferably, secondary beam is one such or a variety of using concrete secondary beam or steel secondary beam in the step 2.
Compared with prior art, the beneficial effects of the present invention are:
(1) precast prestressed base plate interior is equally spaced transversely distributed steelbar, precast prestressed base plate interior in the width direction
It is equally spaced deformed bar along its length, deformed bar is located above transversely distributed steelbar, precast prestressed bottom plate
Spaced set has multiple tracks steel bar girder in the width direction on top, and overall structure is stable and firm, ensure that prestressing force laminated floor slab
Quality.
(2) simple and reasonable for structure after constructing, the construction method of more existing laminated floor slab solves traditional laminated floor slab
Bending resistance and anti-folding rigidity are lower, easily snap off in transport and hoisting process, apply the closeer temporary support etc. of man-hour requirement setting and ask
Topic realizes in construction without setting up form bracing system, effectively shortens and the construction period and saves construction cost.
(3) the prestressing force laminated floor slab for exempting from support of the invention transport after shop-fabricated processing is directly hung to construction site
Dress splicing, more traditional short span laminated floor slab splice seam, and the present invention greatly reduces laminated floor slab piece quantity, improves people
The safety of upper floor plate construction, effectively increases operating efficiency and conevying efficiency.
(4) system seam is bonded by the glue of special Self-Shrinkage Property or is filled up using high-strength mortar joint, is solved
There is the problems such as crack in conventional seams.
(5) to large-span prestressed steel bar girder bottom plate formwork, then one-piece casting concrete is spelled again compared with individual plates moulding
The method of dress is more efficient, structure is firmer, construction method is simpler.
Detailed description of the invention
Fig. 1 is precast prestressed bottom plate, steel bar girder, girder and secondary beam positional diagram.
Fig. 2 is precast prestressed baseplate internal structure, steel bar girder structure and its positional diagram.
Fig. 3 is precast prestressed bottom plate, steel bar girder and secondary beam positional relationship schematic cross-section.
Fig. 4 is precast prestressed bottom plate, steel bar girder and secondary beam positional relationship schematic side view.
Fig. 5 is precast prestressed bottom plate, steel bar girder and steel secondary beam positional relationship schematic cross-section.
Fig. 6 is precast prestressed bottom plate, steel bar girder and steel secondary beam positional relationship schematic side view.
Fig. 7 is precast prestressed bottom plate, steel bar girder and concrete secondary beam positional relationship schematic cross-section.
Fig. 8 is precast prestressed bottom plate, steel bar girder and concrete secondary beam positional relationship schematic side view.
In figure: precast prestressed bottom plate 1, steel bar girder 2, girder 3, secondary beam 4, transversely distributed steelbar 5, deformed bar 6,
Wind up reinforcing bar 21, lower edge reinforcing bar 22, lattice reinforcing bar 23.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of prestressing force laminated floor slab construction method for exempting from support,
The following steps are included:
Step 1: producing precast prestressed steel bar girder bottom plate in the factory, and wherein steel bar girder 2 is away from precast prestressed bottom plate 1
Edges of boards are not more than 300mm, and spacing is not more than 600mm, and 2 lower edge reinforcing bar 22 of steel bar girder is embedded to prefabricated board depth and is not less than 35mm,
The reinforcing bar 21 that winds up of steel bar girder 2 exposes the height of prefabricated board not less than 45mm, wind up reinforcing bar 21 and the lower edge reinforcing bar of steel bar girder 2
22 thickness of concrete cover is not less than 15mm；
Step 2: transport to construction site, the assembled precast prestressed bottom plate 1 of lifting set at precast prestressed 1 both ends of bottom plate respectively
It is placed in 3 top of girder, secondary beam 4 is additionally provided between two girders 3, precast prestressed 1 lower surface middle position of bottom plate passes through secondary
Beam 4 supports；
Step 3: one-piece casting concrete after the completion of assembled, maintenance reach design strength；
Step 4: bonding piece using the glue of special Self-Shrinkage Property or is filled up using high-strength mortar joint, and system is applied
Work is completed.
As in Figure 2-4, precast prestressed 1 upper surface of bottom plate is provided with overlapping layers, precast prestressed bottom plate 1 in step 1
It is connected between overlapping layers by steel bar girder 2, the strength grade of concrete of precast prestressed bottom plate 1 is C40, and overlapping layers mixes
Solidifying soil strength grade is C30 or C40, and the length and width of precast prestressed bottom plate 1, which determines according to design and should meet modulus, to be set
The requirement of meter, precast prestressed 1 upper surface of bottom plate are the naturally thick of concave-convex specification roughness requirements of the depth not less than 4mm of satisfaction
Matte or impression rough surface are equally spaced transversely distributed steelbar 5 inside precast prestressed bottom plate 1 in the width direction, prefabricated pre-
Deformed bar 6 is equally spaced inside stress bottom plate 1 along its length, deformed bar 6 is located on transversely distributed steelbar 5
Side, spaced set has multiple tracks steel bar girder 2 in the width direction on precast prestressed 1 top of bottom plate, and steel bar girder 2 includes the steel that winds up
Muscle 21, lower edge reinforcing bar 22 and lattice reinforcing bar 23(web member bending reinforcing steel bar), lower edge reinforcing bar 22 and lattice reinforcing bar 23 are respectively two, lattice
Structure reinforcing bar 23 is waveform bending, and the upper inflection point of every lattice reinforcing bar 23 is welded with the reinforcing bar 21 that winds up, lattice reinforcing bar 23
Lower inflection point is welded with lower edge reinforcing bar 22, and the reinforcing bar 21 that winds up is higher than the upper surface of precast prestressed bottom plate 1 and is lower than overlapping layers
Highly, lower edge reinforcing bar 22 is located at the deformed bar 6 in precast prestressed bottom plate 1 and being fixed on inside precast prestressed bottom plate 1
On, overall structure is stable and firm, ensure that the quality of prestressing force laminated floor slab.
As viewed in figures 5-8, secondary beam 4 uses concrete secondary beam or steel secondary beam in step 2, can be by simply preparing
Technique is made.
It is simple and reasonable for structure after construction, the construction method of more existing laminated floor slab, in work progress by with together with or
Multiple tracks secondary beam forms composite structure, solves the cumbersome works such as traditional floorboard assembly, formwork, the support of setting bottom, piece processing
Sequence realizes in construction without setting up form bracing system, effectively shortens and the construction period and saves construction cost, solve greatly across
The difficulty of construction is spent, next, which can satisfy, exempts from support, the requirement that highly-safe, globality is good, site operation is high-efficient, and adds
Work mode is simple, first can process large-span prestressed laminated floor slab in shop-fabricated, then arrive construction site and directly lift splicing,
It is readily transported.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of prestressing force laminated floor slab construction method for exempting from support, it is characterised in that: the following steps are included:
Step 1: producing precast prestressed steel bar girder bottom plate in the factory, and wherein steel bar girder (2) is away from precast prestressed bottom plate
(1) edges of boards are not more than 300mm, and spacing is not more than 600mm, and it is not small that steel bar girder (2) lower edge reinforcing bar (22) is embedded to prefabricated board depth
In 35mm, steel bar girder (2) wind up reinforcing bar (21) expose the height of prefabricated board not less than 45mm, the steel that winds up of steel bar girder (2)
The thickness of concrete cover of muscle (21) and lower edge reinforcing bar (22) is not less than 15mm；
Step 2: transport to construction site, the assembled precast prestressed bottom plate (1) of lifting, by precast prestressed bottom plate (1) both ends point
It is not set to girder (3) top, is additionally provided with secondary beam (4) between two girders (3), in precast prestressed bottom plate (1) lower surface
Between position pass through secondary beam (4) support；
Step 3: one-piece casting concrete after the completion of assembled, maintenance reach design strength；
Step 4: bonding piece using the glue of special Self-Shrinkage Property or is filled up using high-strength mortar joint, and system is applied
Work is completed.
2. a kind of prestressing force laminated floor slab construction method for exempting from support according to claim 1, it is characterised in that: the step
Precast prestressed bottom plate (1) upper surface is provided with overlapping layers in rapid one, leads between the precast prestressed bottom plate (1) and overlapping layers
The steel bar girder (2) for crossing precast prestressed bottom plate (1) is connected, and the length and width of the precast prestressed bottom plate (1) is according to setting
Meter determines and should meet the requirement of modular design.
3. a kind of prestressing force laminated floor slab construction method for exempting from support according to claim 1, it is characterised in that: the step
Precast prestressed bottom plate (1) upper surface is the naturally thick of concave-convex specification roughness requirements of the depth not less than 4mm of satisfaction in rapid one
Matte or impression rough surface.
4. a kind of prestressing force laminated floor slab construction method for exempting from support according to claim 1, it is characterised in that: the step
It is equally spaced in the width direction transversely distributed steelbar (5) inside precast prestressed bottom plate (1) in rapid one, it is described precast prestressed
It is equally spaced along its length deformed bar (6) inside bottom plate (1), the deformed bar (6) is located at cross direction profiles steel
Above muscle (5), spaced set has multiple tracks steel bar girder (2) in the width direction on precast prestressed bottom plate (1) top.
5. a kind of prestressing force laminated floor slab construction method for exempting from support according to claim 1, it is characterised in that: the step
Steel bar girder (2) includes wind up reinforcing bar (21), lower edge reinforcing bar (22) and lattice reinforcing bar (23), the lower edge reinforcing bar (22) in rapid one
It is respectively two with lattice reinforcing bar (23), the lattice reinforcing bar (23) is waveform bending, every lattice reinforcing bar (23)
Upper inflection point is welded with the reinforcing bar that winds up (21), and the lower inflection point of the lattice reinforcing bar (23) is welded with lower edge reinforcing bar (22),
The reinforcing bar that winds up (21) is higher than the upper surface of precast prestressed bottom plate (1) and lower than overlapping layer height, the lower edge reinforcing bar
(22) it is located in precast prestressed bottom plate (1) and is fixed on the internal deformed bar (6) of precast prestressed bottom plate (1).
6. a kind of prestressing force laminated floor slab construction method for exempting from support according to claim 1, it is characterised in that: the step
Secondary beam (4) is one such or a variety of using concrete secondary beam or steel secondary beam in rapid two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910321537.0A CN110005110A (en) | 2019-04-22 | 2019-04-22 | A kind of prestressing force laminated floor slab construction method for exempting from support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910321537.0A CN110005110A (en) | 2019-04-22 | 2019-04-22 | A kind of prestressing force laminated floor slab construction method for exempting from support |
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| Publication Number | Publication Date |
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| CN110005110A true CN110005110A (en) | 2019-07-12 |
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| CN201910321537.0A Pending CN110005110A (en) | 2019-04-22 | 2019-04-22 | A kind of prestressing force laminated floor slab construction method for exempting from support |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417393A (en) * | 2020-12-01 | 2021-09-21 | 临沂职业学院 | Laminated floor slab and connecting method thereof |
| CN114250899A (en) * | 2021-12-24 | 2022-03-29 | 奥意建筑工程设计有限公司 | Single-inclined-support large-span floor structure system |
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| JP6108595B2 (en) * | 2012-11-12 | 2017-04-05 | 株式会社長谷工コーポレーション | Ribbed precast concrete plate and method of placing concrete floor slab and beam using it |
| CN107034989A (en) * | 2016-12-05 | 2017-08-11 | 浙江省建工集团有限责任公司 | A kind of prefabrication prefabricated components exempt to support installation method |
| CN107542196A (en) * | 2017-09-04 | 2018-01-05 | 山东省建筑科学研究院 | Prestressed concrete bidirectional laminated slab and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202430877U (en) * | 2011-11-28 | 2012-09-12 | 美建建筑***(中国)有限公司 | Continuous superposed beam used for steel structure |
| JP6108595B2 (en) * | 2012-11-12 | 2017-04-05 | 株式会社長谷工コーポレーション | Ribbed precast concrete plate and method of placing concrete floor slab and beam using it |
| CN105297982A (en) * | 2015-10-14 | 2016-02-03 | 山东凝华建筑科技有限公司 | Laminated slab floor system based on pre-stress baseplate with truss and preparation method of same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417393A (en) * | 2020-12-01 | 2021-09-21 | 临沂职业学院 | Laminated floor slab and connecting method thereof |
| CN114250899A (en) * | 2021-12-24 | 2022-03-29 | 奥意建筑工程设计有限公司 | Single-inclined-support large-span floor structure system |
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Application publication date: 20190712 |