CN111622407A - Construction method of large-cavity hollow floor slab - Google Patents
Construction method of large-cavity hollow floor slab Download PDFInfo
- Publication number
- CN111622407A CN111622407A CN202010470584.4A CN202010470584A CN111622407A CN 111622407 A CN111622407 A CN 111622407A CN 202010470584 A CN202010470584 A CN 202010470584A CN 111622407 A CN111622407 A CN 111622407A
- Authority
- CN
- China
- Prior art keywords
- floor slab
- box mould
- box
- template
- mould
- 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.)
- Pending
Links
Images
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
-
- 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
- E04B5/326—Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements
-
- 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
- E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
Abstract
The invention relates to a construction method of a large-cavity hollow floor slab, which transfers buoyancy generated during pouring and vibrating of a box mould to a template system through reinforcing steel bars on the floor slab, side rib beams of the box mould, iron wires and template keels to form floating point resistance. Through setting up the case mould as the centre form, can replace the template to prop up and establish, fill and vibrate when concrete placement visually, can guarantee to pour and vibrate the quality. Through the design of anti floating point, fix the case mould, can prevent the case mould floating and the displacement when pouring and vibrating to guarantee the pouring and the quality of vibrating of concrete. The invention is particularly suitable for the construction of large-cavity hollow floor slabs, and can solve the problems that a large-cavity formwork is inconvenient to support, and the quality of leakage vibration is easy to cause and cannot be ensured during concrete pouring.
Description
Technical Field
The invention relates to a floor slab construction method, in particular to a large-cavity hollow floor slab construction method.
Background
The cast-in-place hollow floor slab structure can save the concrete consumption, reduce the structure dead weight, reduce the whole concrete of building, reinforcing bar quantity, reduce and synthesize the cost. The closed cavity formed by the cast-in-place hollow floor slab reduces the transmission of the upper and lower noises and heat energy of the floor slab, improves the sound insulation and heat insulation performance of the floor slab, brings good economic benefit due to the saving of building materials and the convenience of construction, and has wider application prospect in the later development of the building industry.
However, with the increase of the cavity of the hollow slab, the construction difficulty is increased, and particularly, the support of the cavity inner mold and the pouring and forming of concrete have great problems, so that the quality of the concrete floor slab is difficult to ensure. In traditional hollow floor construction, because the unable formwork of inner chamber, generally adopt to fill the cystosepiment construction, the cystosepiment is lighter, and easy atress drift needs to be fixed when concreting, and the cystosepiment is difficult for vibrating, forms the numb face phenomenon of honeycomb, along with the appearance of big cavity floor, adopts the cystosepiment problem more outstanding, and the quality of floor is difficult to guarantee. The large-cavity hollow floor slab has the problems that the formwork is inconvenient to support, the vibration leakage is easy to occur during the concrete construction and the like due to the large cavity.
Disclosure of Invention
The invention aims to provide a construction method of a large-cavity hollow floor slab, which aims to solve the problems that a formwork is inconvenient to support and vibration leakage is easy to occur during concrete construction due to a large cavity of the large-cavity hollow floor slab.
The invention is realized by the following steps: a construction method of a large-cavity hollow floor slab comprises the following steps:
a. and erecting a floor slab template, paying off the floor slab template, and determining the position of the box template, the position of the water and electricity pipeline and the position of the hole.
b. And fully paving the anti-crack steel wire mesh on the floor slab template.
c. And binding a box mould side rib beam on the floor slab template, wherein the side rib beam comprises a rib beam hoop, rib beam upper steel bars and rib beam lower steel bars, and the rib beam upper steel bars and the rib beam lower steel bars are all connected in the rib beam hoop in a penetrating manner.
d. And laying a pre-buried pipeline.
e. And placing cushion blocks between the side rib beams of the box mould and the floor slab template, and using iron wires to penetrate through the floor slab template to fix the side rib beams of the box mould and the keels of the floor slab template together.
f. And installing the box mould in the blank space between the side rib beams of the box mould, and placing a cushion block between the floor slab template and the box mould.
g. And binding the reinforcing steel bars on the floor slab, and placing cushion blocks between the reinforcing steel bars on the floor slab and the box mould.
h. And pouring and vibrating concrete, curing the concrete and then removing the mold.
The box mould is a box body made of dense mesh steel wire mesh.
The reinforcing steel bars on the floor slab and the reinforcing steel bars on the rib beam are on the same layer, and the reinforcing steel bars on the floor slab and the reinforcing steel bars on the rib beam are bound and fixed together.
And g, when concrete is poured, pouring the positions of the beams and the columns, then pouring the side rib beams of the box mould, filling the bottom of the box mould into the gap at the bottom of the box mould by driving grout, and finally pouring concrete at the top of the floor slab.
In the steps d and e, when the cushion blocks are placed, the anti-crack steel wire mesh is firstly partially cut, and the cushion blocks are placed below the anti-crack steel wire mesh.
When the embedded pipeline is laid, the embedded pipeline is arranged in the section of the side rib beam of the box mould along the side rib beam of the box mould as far as possible, and the position of the box mould is avoided.
For the pipelines which are locally dense, the pipelines are arranged in the same box mould position as intensively as possible, and the pipelines are avoided by using a small-size box mould.
The invention transmits the buoyancy generated by the box mould during pouring and vibrating to the template system through the reinforcing steel bars on the floor, the side rib beams of the box mould, the iron wires and the template keels to form the floating point resistance. Through setting up the case mould as the centre form, can replace the template to prop up and establish, fill and vibrate when concrete placement visually, can guarantee to pour and vibrate the quality. Through the design of anti floating point, fix the case mould, can prevent the case mould floating and the displacement when pouring and vibrating to guarantee the pouring and the quality of vibrating of concrete.
The invention is particularly suitable for the construction of large-cavity hollow floor slabs, and can solve the problems that a large-cavity formwork is inconvenient to support, and the quality of leakage vibration is easy to cause and cannot be ensured during concrete pouring.
Drawings
FIG. 1 is a schematic of the present invention.
In the figure: 1. a floor slab formwork; 2. a box mold; 3. anti-crack steel wire mesh; 4. a rib beam stirrup; 5. reinforcing steel bars are arranged on the rib beams; 6. reinforcing steel bars under the rib beams; 7. cushion blocks; 8. a keel; 9. reinforcing steel bars on the floor slab; 10. and (4) iron wires.
Detailed Description
As shown in fig. 1, the present invention comprises the steps of:
a. and (3) erecting a floor slab template 1, paying off the floor slab template 1, and determining the position of the box template 2, the position of the water and electricity pipeline and the position of the hole.
b. And fully paving an anti-crack steel wire mesh 3 on the floor slab formwork 1.
c. And binding a box mould side rib beam on the floor slab template 1, wherein the side rib beam comprises a rib beam stirrup 4, a rib beam upper steel bar 5 and a rib beam lower steel bar 6, and the rib beam upper steel bar 5 and the rib beam lower steel bar 6 are connected in the rib beam stirrup 4 in a penetrating manner.
d. And laying a pre-buried pipeline.
e. And placing a cushion block 7 between the side rib beam of the box mould and the floor slab template 1, and using an iron wire 10 to penetrate through the floor slab template 1 to fix the side rib beam of the box mould and the keel 8 of the floor slab template 1 together.
f. And (3) installing the box mould 2 in a blank between the side rib beams of the box mould, and placing a cushion block 7 between the floor slab template 1 and the box mould 2.
g. And (3) binding the reinforcing steel bars 9 on the floor slab, and placing cushion blocks 7 between the reinforcing steel bars 9 on the floor slab and the box mould 2.
h. And pouring and vibrating concrete, curing the concrete and then removing the mold.
According to the requirement of a design box arranging drawing, paying off is carried out on the floor slab template 1 so as to ensure the accuracy of the subsequent binding of the reinforcement of the side rib beam of the box mould and the installation position of the box mould 2. And (4) releasing control lines of the side rib beams of the longitudinal and transverse formworks according to the axis, wherein the space between the side rib beams of the formworks is the position for placing the box mold 2. Because the number of pre-buried and reserved components in the floor slab is large, the positions of the water and electricity pipelines and the holes are popped up on the floor slab template 1, and the position accuracy during construction is ensured.
After the anti-crack steel wire meshes 3 are laid, according to the position of paying off on the floor slab template 1, the side rib beams of the box mould are bound in sequence, and the width of the rib beam stirrups 4 is generally manufactured by reducing about 10mm according to the design width of the side rib beams of the box mould, so that the box mould 2 can be conveniently placed in. And laying the upper reinforcing steel bars 5 of the rib beam, sleeving the upper reinforcing steel bars 5 of the rib beam into the rib beam stirrups 4 one by one, and then penetrating the lower reinforcing steel bars 6 of the rib beam into the rib beam stirrups 4. And the corners of the side rib beams of the box mould are lapped by using reinforcing steel bars, so that the strength and the rigidity of the side rib beams of the template are enhanced.
When laying the embedded pipeline, the embedded pipeline should be arranged in the section of the side rib beam of the box mould along the side rib beam of the box mould as far as possible to avoid the position of the box mould 2. The lines must generally not cross under the tank mould 2 in order to avoid lifting the tank mould 2. However, for the pipelines which are relatively dense locally, the pipelines should be arranged in the same box mould 2 as intensively as possible, and the pipelines should be avoided by using the small-size box mould 2. When the tank mold 2 cannot avoid the pipeline, the tank mold 2 may be partially opened or disconnected.
After the binding of the reinforcing steel bars of the side rib beam of the box mould is finished, an anti-floating point is set, and the anti-floating force transmission path of the anti-floating point is as follows: buoyancy on the box mould 2, reinforcing steel bars on the floor slab 9, rib beam stirrups 4, iron wires 10 and a floor slab template 1. When the iron wire 10 is connected in a penetrating manner, holes are formed in the floor slab templates 1 on two sides of the side rib beam of the box mould, the iron wire 10 penetrates through the floor slab templates 1 and bypasses the lower parts of the rib beam stirrups 4, the rib beam lower reinforcing steel bars 6, the cushion blocks 7 and the keels 8 of the floor slab templates 1, and is screwed down on one side of the keels 8. When the anti floating point is arranged, the anti floating point is arranged from the periphery of the floor slab to the middle and is arranged at the crossing position of the side rib beam of the box mould. After the anti-floating point setting is completed, special checking is needed, the anti-floating point setting is ensured to be uniform, the position is accurate, the fixing is firm and reliable, and the anti-floating requirement is met.
In the steps d and e, when the cushion block 7 is placed, the anti-crack steel wire mesh 3 is partially cut, and the cushion block 7 is placed below the anti-crack steel wire mesh 3. And a cushion block 7 is arranged between the box mould 2 and the floor slab template 1 and is used for supporting the box mould 2 to be empty. The bottom of the box mould 2 can be bound and lifted by the central point of the box mould 2 by using a binding wire, and the bottom of the box mould 2 is hooked by using an iron hook to empty when concrete is poured. The bottom of the box mould 2 is emptied to facilitate the entering of concrete during the pouring of the concrete.
The box mould 2 is a hollow box body made of dense mesh steel wire mesh. And a box-type tool is adopted for placing the deformation of the box mould 2 in the transportation and installation process during the lifting of the box mould 2.
After the box mould 2 is placed, the anti-floating point only remains the reinforcement 9 on the floor without binding, and the reinforcement 9 on the floor is bound above the box mould 2, namely at the position between the side rib beams of the box mould. The reinforcing steel bars 9 on the floor slab and the reinforcing steel bars 5 on the rib beam are on the same layer, and the reinforcing steel bars 9 on the floor slab and the reinforcing steel bars 5 on the rib beam are bound and fixed together. In order to ensure the integral anti-floating effect, the orthogonal floor upper reinforcing steel bars 9 are pressed below the rib beam upper reinforcing steel bars 5 and fixed with the rib beam upper reinforcing steel bars 5. After the binding of the steel bars 9 on the floor slab is finished, a cushion block 7 is additionally arranged between the top of each box mould 2 and the steel bars 9 on the floor slab and used for pressing the box moulds 2 to prevent the box moulds 2 from floating upwards and ensure the pouring thickness of the concrete on the upper part of the box moulds 2.
And after the steel bars on the template are bound, checking the counter floating points again, and entering a concrete pouring process after acceptance check is qualified.
When concrete is poured, the positions of the beams and the columns are poured firstly, then the side rib beams of the box mould are poured, slurry is driven into the gap at the bottom of the box mould 2 to fill the bottom of the box mould 2, and finally concrete at the top of the floor slab is poured. When vibrating, the vibrating rods vibrate in sequence along the pouring direction, and the vibrating rods are prevented from directly contacting the box mold 2.
And (3) watering and maintaining the floor slab, and removing the formwork when the strength of the floor slab reaches 100%, wherein the formwork removing sequence comprises first supporting and then removing, first removing the non-bearing formwork and then removing the bearing formwork.
The buoyancy generated during pouring and vibrating of the box mould 2 is transferred to the template system through the reinforcing steel bars 9 on the floor slab, the side rib beams of the box mould, the iron wires 10 and the template keels 8 to form the floating point resistance. Through setting up case mould 2 as the centre form, can replace the template to prop up and establish, fill and vibrate when concrete placement visually, can guarantee to pour and vibrate the quality. Through the design of anti floating point, fix case mould 2, can prevent case mould 2 floating and the displacement when pouring and vibrating to guarantee the pouring and the quality of vibrating of concrete.
Claims (7)
1. A construction method of a large-cavity hollow floor slab is characterized by comprising the following steps:
a. erecting a floor slab template, paying off the floor slab template, and determining the position of a box mould, the position of a water and electricity pipeline and the position of a hole;
b. fully paving an anti-crack steel wire mesh on the floor slab template;
c. binding a box mould side rib beam on a floor slab template, wherein the side rib beam comprises a rib beam hoop, rib beam upper steel bars and rib beam lower steel bars, and the rib beam upper steel bars and the rib beam lower steel bars are all connected in the rib beam hoop in a penetrating manner;
d. laying a pre-buried pipeline;
e. placing cushion blocks between the side rib beams of the box mould and the floor slab template, and using iron wires to penetrate through the floor slab template to fix the side rib beams of the box mould and the keels of the floor slab template together;
f. installing a box mould in a blank space between side rib beams of the box mould, and placing a cushion block between a floor slab template and the box mould;
g. binding reinforcing steel bars on a floor slab, and placing cushion blocks between the reinforcing steel bars on the floor slab and the box mould;
h. and pouring and vibrating concrete, curing the concrete and then removing the mold.
2. The large-cavity hollow floor slab construction method according to claim 1, wherein the box mold is a box body made of dense mesh steel wire mesh.
3. The large-cavity hollow floor construction method according to claim 1, wherein the floor reinforcing bars and the rib reinforcing bars are in the same layer, and the floor reinforcing bars and the rib reinforcing bars are bound and fixed together.
4. The construction method of the large-cavity hollow floor slab as claimed in claim 1, wherein in the step g, when the concrete is poured, the beam and column positions are poured, then the side rib beams of the box mould are poured, the gap at the bottom of the box mould is filled with the grout, and finally the concrete at the top of the floor slab is poured.
5. The method for constructing the hollow floor slab with the large cavity according to claim 1, wherein in the steps d and e, when the cushion blocks are placed, the anti-crack steel wire mesh is partially cut, and the cushion blocks are placed below the anti-crack steel wire mesh.
6. The large-cavity hollow floor construction method according to claim 1, wherein the embedded pipelines are laid along the side girds of the box mould and arranged in the cross sections of the side girds of the box mould to the greatest extent so as to avoid the positions of the box mould.
7. The large-cavity hollow floor construction method according to claim 6, wherein for the locally dense pipelines, the pipelines are arranged in the same box mould position as intensively as possible, and the pipelines are avoided by using a small-size box mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470584.4A CN111622407A (en) | 2020-05-28 | 2020-05-28 | Construction method of large-cavity hollow floor slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470584.4A CN111622407A (en) | 2020-05-28 | 2020-05-28 | Construction method of large-cavity hollow floor slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111622407A true CN111622407A (en) | 2020-09-04 |
Family
ID=72259279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010470584.4A Pending CN111622407A (en) | 2020-05-28 | 2020-05-28 | Construction method of large-cavity hollow floor slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111622407A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806656A (en) * | 2012-11-06 | 2014-05-21 | 南通卓强建设工程有限公司 | Construction method of cast-in-place concrete flat slab built-in thin-wall hollow box body |
| CN106088436A (en) * | 2016-06-12 | 2016-11-09 | 青岛海川建设集团有限公司 | BRT Lightweight core mould construction technology |
| CN111088865A (en) * | 2018-10-23 | 2020-05-01 | 重庆比瑞实建材有限公司 | Construction method of hollow floor slab |
-
2020
- 2020-05-28 CN CN202010470584.4A patent/CN111622407A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806656A (en) * | 2012-11-06 | 2014-05-21 | 南通卓强建设工程有限公司 | Construction method of cast-in-place concrete flat slab built-in thin-wall hollow box body |
| CN106088436A (en) * | 2016-06-12 | 2016-11-09 | 青岛海川建设集团有限公司 | BRT Lightweight core mould construction technology |
| CN111088865A (en) * | 2018-10-23 | 2020-05-01 | 重庆比瑞实建材有限公司 | Construction method of hollow floor slab |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206428872U (en) | A kind of close splicing seam superimposed sheet | |
| CN106639093A (en) | Close splicing seam-type laminated slab | |
| CN105569224A (en) | Concrete-filled steel tube edge restraint overlapping integrated shear wall and preparing and installation methods thereof | |
| CN101324093A (en) | Combined type relief component cast-in-situ hollow building roof and construction method thereof | |
| CN104631677A (en) | Construction technology for hollow super-thick concrete terrace | |
| CN101644082A (en) | Assembling method of gypsum evacuated mould | |
| CN112031237A (en) | Cast-in-place concrete hollow floor slab embedded type core mold anti-floating fixing device | |
| CN210421568U (en) | Assembled beam and plate structure | |
| CN207919848U (en) | Top plate of underground parking garage is combined the unit with plastics diaphragm capsule | |
| CN112323635A (en) | Construction method for cast-in-place wet joint and bridge structure | |
| CN204435616U (en) | Truss bars double layer fibre gypsum plank, non-dismantling formwork wall body structure | |
| CN111622407A (en) | Construction method of large-cavity hollow floor slab | |
| CN212562110U (en) | Cast-in-place concrete hollow floor slab embedded type core mold anti-floating fixing device | |
| CN210976322U (en) | Bracket superposed beam and forming equipment thereof | |
| CN113323262A (en) | 3D printed prefabricated wall module, wall and construction method of wall | |
| JP5290714B2 (en) | PRECAST CONCRETE MEMBER FOR WAVE RETURN PART OF DAM WALL WALL | |
| CN105839824B (en) | Shed deckhead construction method | |
| CN100360754C (en) | Hollow formwork member for cast-in-situ concrete | |
| CN110748221A (en) | Prefabricated assembled pond guide wall | |
| CN215563854U (en) | Prefabricated assembled constructional column of concrete | |
| CN215593642U (en) | Bridge prestressed cast-in-situ continuous hollow slab beam | |
| CN212153865U (en) | Prefabricated component connected node structure | |
| CN216809966U (en) | Foundation cushion cap side form construction structures in foundation ditch | |
| CN211368416U (en) | Prefabricated decking is with pouring template and decking | |
| CN219032904U (en) | Quick high-strength connection structure of prefabricated pipe pile and bent cap with prefabricated filling core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200904 |