CN107471427B - Construction method of prefabricated hollow floor slab - Google Patents
Construction method of prefabricated hollow floor slab Download PDFInfo
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- CN107471427B CN107471427B CN201710731788.7A CN201710731788A CN107471427B CN 107471427 B CN107471427 B CN 107471427B CN 201710731788 A CN201710731788 A CN 201710731788A CN 107471427 B CN107471427 B CN 107471427B
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 239000004567 concrete Substances 0.000 claims abstract description 42
- 230000003014 reinforcing effect Effects 0.000 claims description 42
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 41
- 230000010412 perfusion Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000010410 layer Substances 0.000 description 33
- 230000006872 improvement Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
- B28B13/065—Removing the shaped articles from moulds by applying electric current or other means of discharging, e.g. pneumatic or hydraulic discharging means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0055—Mould pallets; Mould panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
- B28B7/32—Cores; Mandrels adjustable, collapsible, or expanding inflatable
-
- 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
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
A construction method of a prefabricated hollow floor slab comprises the following steps: (1) binding steel bars in the mould bed to form a lower layer steel bar mesh, an upper layer steel bar mesh and a rib beam; (2) putting the core mold into a mold bed; (3) the air pump uniformly inflates the core mould through a pipe network; (4) pouring concrete into the pouring cavity of the mould bed; (5) after the concrete is cured, the core die can form a cavity in the concrete; (6) air in the core mould is pumped out by an air pump, and the core mould shrinks and is separated from the concrete; (7) when the volume of the core mould is reduced to a certain degree, the prefabricated and formed hollow floor slab is lifted, on the other hand, the bottom plate of the mould bed is fixed, at the moment, the core mould and the prefabricated hollow floor slab move relatively, and all the core moulds can be drawn out at one time. The core mould can be repeatedly used, so that the manufacturing cost of the hollow floor slab is reduced; the core mould is uniformly inflated and deflated and is uniformly drawn out, so that the construction period is shortened.
Description
Technical Field
The invention relates to the field of buildings, in particular to a construction method of a prefabricated hollow floor slab.
Background
Most buildings in China are of reinforced concrete structures, the structures are high in building material consumption and heavy in weight, and particularly for floor slabs, the middle parts of the buildings are generally suspended, so that the strength of the floor slabs is low. Therefore, the country advocates the adoption of the cast-in-place hollow floor slab technology to realize the construction of the floor slab, so that the material consumption can be reduced, and the weight of the floor slab can be lightened. The hollow floor slab is generally constructed by adding a core mold into concrete, for example, a hollow floor slab and a construction method thereof disclosed in chinese patent publication No. 103266704, the hollow floor slab includes an anti-floating member, a protective layer reinforcing bar, a lower support fixing member, a core mold, an upper support member, an upper layer reinforcing bar, a fixing structure and concrete. The construction method comprises the following steps: (1) building a template; (2) installing an anti-floating component; (3) laying a protective layer steel bar; (4) setting a lower supporting and fixing piece; (5) installing a core mold; (6) installing an upper supporting firmware; (7) laying upper-layer steel bars; (8) pouring concrete; (9) and (5) disassembling the template. The hollow floor slab structure has the advantages that the phenomenon of iron wire binding and exposure can not occur, the position of the core die is determined, and the distance between the reinforcing steel bar and the core die can be limited. The core mould of the hollow floor slab is a disposable article and cannot be taken out after concrete is poured. The core mould with good quality has high manufacturing cost, and the manufacturing cost of the hollow floor slab is undoubtedly increased as the core mould of the consumer goods; in addition, the existing process for filling and forming the hollow floor slab has the problems of multiple uncertain factors, long construction period and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a prefabricated hollow floor slab, which reduces the manufacturing cost of the hollow floor slab and shortens the construction period.
In order to solve the technical problems, the technical scheme of the invention is as follows: a construction method of a prefabricated hollow floor slab comprises the following steps:
(1) binding steel bars in a mould bed to form a lower layer of steel bar mesh, an upper layer of steel bar mesh and rib beams, wherein the rib beams are criss-cross to form a plurality of rectangular areas; the mould bed comprises a bottom plate and a side wall, and a perfusion cavity is defined by the bottom plate and the side wall;
(2) a core mould is placed in a rectangular area formed by the longitudinal and transverse rib beams, the core mould comprises an air bag and a movable air drum arranged at the bottom of the air bag, and the movable air drum penetrates through a bottom plate of the mould bed and then is connected with a pipe network;
(3) the air pump uniformly inflates the core mould in the mould bed through a pipe network, and the core mould is inflated and then is expanded and positioned between the upper layer reinforcing mesh and the lower layer reinforcing mesh;
(4) pouring concrete into the pouring cavity of the mould bed;
(5) after the concrete is cured, the core die can form a cavity in the concrete;
(6) air in the core mould is pumped out by an air pump, and the core mould shrinks and is separated from the concrete;
(7) when the volume of the core mould is reduced to a certain degree, the prefabricated hollow floor slab is lifted, on the other hand, the bottom plate of the mould bed is fixed, at the moment, the core mould and the prefabricated hollow floor slab move relatively, and all the core moulds can be drawn out at one time, so that the prefabricated hollow floor slab is manufactured.
After the prefabricated hollow floor slab is poured and formed, the core die can be taken out, and the core die can be recycled, so that the manufacturing cost of the prefabricated hollow floor slab is reduced; because all the core moulds in the prefabricated hollow floor slab are uniformly inflated and deflated and are integrally drawn out, the operation efficiency is improved, and the construction period is shortened.
As an improvement, the side wall comprises a left baffle, a right baffle, a front baffle and a rear baffle, wherein the left baffle and the right baffle are arranged oppositely, and the front baffle and the rear baffle are arranged oppositely; the lower part of the front baffle is provided with first lower through holes which are arranged in a straight line, and the upper part of the front baffle is provided with first upper through holes which are arranged in a straight line; the lower part of the rear baffle is provided with second lower through holes which are arranged in a straight line, and the upper part of the rear baffle is provided with second upper through holes which are arranged in a straight line; the first lower through holes correspond to the second lower through holes one by one, and the first upper through holes correspond to the second upper through holes one by one; the lower part of the left baffle is provided with third lower through holes which are arranged in a straight line, and the upper part of the left baffle is provided with third upper through holes which are arranged in a straight line; the lower part of the right baffle is provided with fourth lower through holes which are arranged in a straight line, and the upper part of the right baffle is provided with fourth upper through holes which are arranged in a straight line; the third lower through holes correspond to the fourth lower through holes one by one, and the third upper through holes correspond to the fourth upper through holes one by one.
As an improvement, a reinforcing steel bar is inserted into the third lower through hole of the left baffle plate, enters the pouring cavity and penetrates out of the fourth lower through hole of the right baffle plate, so that a transverse reinforcing steel bar of the lower-layer reinforcing mesh is formed; and inserting reinforcing steel bars into the first lower through holes of the front baffle plate, enabling the reinforcing steel bars to enter the pouring cavity and penetrate out of the second lower through holes of the rear baffle plate, so that longitudinal reinforcing steel bars of the lower layer reinforcing mesh are formed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are mutually staggered to form the lower layer reinforcing mesh.
As an improvement, a reinforcing steel bar is inserted into the third upper through hole of the left baffle plate, enters the pouring cavity and penetrates out of the fourth upper through hole of the right baffle plate, so that a transverse reinforcing steel bar of the upper reinforcing mesh is formed; and inserting reinforcing steel bars into the first upper through holes of the front baffle plate, enabling the reinforcing steel bars to enter the pouring cavity and penetrate out of the second upper through holes of the rear baffle plate, so that the longitudinal reinforcing steel bars of the upper-layer reinforcing mesh are formed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are mutually staggered to form the upper-layer reinforcing mesh.
As an improvement, the movable air drum comprises a barrel body and a valve arranged in the barrel body, the valve divides the barrel body into an air inlet end and an air outlet end, the air outlet end of the barrel body is provided with an air outlet hole communicated with the air bag, and the air outlet end of the barrel body is provided with a connecting surface connected with the air bag.
As an improvement, the connecting surface and the air outlet hole are both arranged on the side surface of the air outlet end of the cylinder body, a through hole is formed in the middle of the air bag, and the air outlet end of the cylinder body is inserted into the through hole.
As the improvement, adopt lifting device to hoist prefabricated hollow floor, lifting device includes two centre gripping hoisting plates in prefabricated hollow floor both sides, the top of hoisting plate is equipped with the hoist and mount ear, the upper portion and the lower part of hoisting plate all are equipped with one row of through-hole group that supplies the reinforcing bar to pass, and every row of through-hole group comprises a plurality of through-holes of arranging in a line along the length direction of hoisting plate.
Compared with the prior art, the invention has the following beneficial effects:
after the prefabricated hollow floor slab is poured and formed, the core die can be taken out, and the core die can be recycled, so that the manufacturing cost of the prefabricated hollow floor slab is reduced; because all the core moulds in the prefabricated hollow floor slab are uniformly inflated and deflated and are integrally drawn out, the operation efficiency is improved, and the construction period is shortened.
Drawings
Fig. 1 is a sectional view of a prefabricated hollow floor slab.
FIG. 2 is a top view of a concrete block.
Fig. 3 is a dimension relation diagram of the prefabricated hollow floor.
Fig. 4 is a schematic view of the mold bed structure.
Fig. 5 is a schematic view of the mating of the mandrel and the pipe network.
Fig. 6 is a disassembled view of the air bag and the movable air drum.
FIG. 7 is a cross-sectional view of the air bag and the movable air drum.
Fig. 8 is a schematic view of the combination of the hoisting tool and the prefabricated hollow floor slab.
Fig. 9 is a schematic diagram of a hoisting plate structure.
Fig. 10 is a schematic view of a prefabricated hollow floor slab production line.
Fig. 11 is a schematic structural view of the conveying trolley.
Fig. 12 is a schematic view of a placement frame.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a construction method of a prefabricated hollow floor slab includes the following steps:
(1) steel bars are tied in the die bed 2 to form a lower layer of steel bar mesh 11, an upper layer of steel bar mesh 12 and rib beams 14, and the rib beams 14 are criss-cross to form a plurality of rectangular areas; the mould bed 2 comprises a bottom plate and a side wall, and a perfusion cavity is defined by the bottom plate and the side wall;
(2) a core mould 4 is placed in a rectangular area formed by longitudinal and transverse rib beams, the core mould 4 comprises an air bag 41 and a movable air drum 42 arranged at the bottom of the air bag 41, and the movable air drum 42 penetrates out of the bottom plate of the mould bed 2 and then is connected with a pipe network 3;
(3) the air pump 31 uniformly inflates the core mould 4 in the mould bed 2 through the pipe network 3, and the core mould 4 is inflated and then is expanded and positioned between the upper layer reinforcing mesh 12 and the lower layer reinforcing mesh 11;
(4) pouring concrete into the pouring cavity of the mould bed 2;
(5) after the concrete is cured, the core mold can form a cavity 15 in the concrete;
(6) the air pump 31 is used for pumping out the air in the core mould 4, and the core mould 4 shrinks and is separated from the concrete;
(7) when the volume of the core mould 4 is reduced to a certain degree, the prefabricated hollow floor slab 1 is lifted, on the other hand, the bottom plate of the mould bed 2 is fixed, at the moment, the core mould 4 and the prefabricated hollow floor slab move relatively, and all the core moulds can be drawn out at one time, so that the prefabricated hollow floor slab is manufactured.
As shown in figures 2 and 3, the prefabricated hollow floor slab comprises a rectangular concrete block, wherein the length of the concrete block is L2 and is 500-15000 mm, and the width of the concrete block is L1 and is 500-15000 mm. An upper layer of reinforcing mesh 12, a lower layer of reinforcing mesh 11 and a rib beam 14 are arranged in the concrete block; the upper layer of mesh reinforcement 12 is located above the lower layer of mesh reinforcement 11, and the ribbed beams 14 are located between the upper layer of mesh reinforcement 12 and the lower layer of mesh reinforcement 11. The rib beam 14 is a plurality of rectangular areas distributed in an array at longitudinally and transversely arranged separation positions, a cavity 15 is arranged in each rectangular area and inside the concrete block, and the cavity 14 is formed by the core mould 4; the cavity 15 is square, chamfers are arranged on the top edge and the bottom edge of the cavity 15, and the formed cavity 15 has certain bearing capacity and can strengthen the strength of the hollow floor slab. The ribbed beam is composed of metal rings arranged at intervals, the top of each metal pipe is connected with the upper layer of reinforcing mesh 12, and the bottom of each metal ring is connected with the lower layer of reinforcing mesh 11; since the rib beams 14 do not protrude from the surface of the floor slab, the top and bottom surfaces of the concrete block are made flat. The distance between the top of the cavity 15 and the top surface L5 of the concrete block is 50-300 mm, and the distance between the bottom of the cavity 15 and the bottom surface L6 of the concrete block is 50-300 mm; the distance L4 between the adjacent cavities 15 is 50-500 mm, and the thickness L3 of the concrete block is 200-1500 mm. The hollow floor slab has enough supporting force under the action of the upper layer reinforcing mesh 12, the lower layer reinforcing mesh 11 and the rib beam 14, and on the premise of meeting the relevant standard requirements, the hollow floor slab saves more materials and has lower manufacturing cost.
As shown in fig. 4, the mold bed 2 used for forming the prefabricated hollow floor slab in this embodiment includes a bottom plate 25 and a side wall, the side wall is rectangular, and the side wall and the bottom plate 25 enclose a rectangular perfusion cavity; in addition, the height of the side wall can be set according to the thickness of the prefabricated hollow floor slab. The side wall comprises a left baffle plate 23, a right baffle plate 24, a front baffle plate 21 and a rear baffle plate 22, wherein the left baffle plate 23 and the right baffle plate 24 are arranged oppositely, the front baffle plate 21 and the rear baffle plate 22 are arranged oppositely, the left baffle plate 23 and the right baffle plate 24 form the long side of a rectangle, and the front baffle plate 21 and the rear baffle plate 22 form the short side of the rectangle. The baffle plates used by the side wall are metal plates, and reinforcing ribs are arranged on the outer wall surfaces of the left baffle plate 23, the right baffle plate 24, the front baffle plate 21 and the rear baffle plate 22 and used for enhancing the strength of the baffle plates and preventing the baffle plates from deforming; the inner wall surface of the baffle is basically smooth, so that the baffle is easy to separate from concrete; since the baffles need to be separated in a parallel movement manner, pull rings are arranged on the outer wall surfaces of the left baffle 23, the right baffle 24, the front baffle 21 and the rear baffle 22, and external equipment can be used for pulling the pull rings, so that the baffles are separated from the prefabricated hollow floor slab. The lower part of the front baffle 21 is provided with first lower through holes 211 which are arranged in a straight line, and the upper part of the front baffle 21 is provided with first upper through holes 212 which are arranged in a straight line; the lower part of the rear baffle 22 is provided with second lower through holes 221 which are arranged in a straight line, and the upper part of the rear baffle 22 is provided with second upper through holes 222 which are arranged in a straight line; the first lower through holes 211 correspond to the second lower through holes 221 one by one, and the first upper through holes 212 correspond to the second upper through holes 222 one by one. The lower part of the left baffle plate 23 is provided with third lower through holes 231 arranged in a straight line, and the upper part of the left baffle plate 23 is provided with third upper through holes 232 arranged in a straight line; the lower part of the right baffle plate 24 is provided with fourth lower through holes 241 arranged in a straight line, and the upper part of the right baffle plate 24 is provided with fourth upper through holes 242 arranged in a straight line; the third lower through holes 231 correspond to the fourth lower through holes 241, and the third upper through holes 232 correspond to the fourth upper through holes 242. The diameter of the through hole is set according to the thickness of the steel bar, and the steel bar can smoothly pass through the through hole. The distance between the first lower through hole 211 and the second lower through hole 221 and the bottom plate 25 is L1, the distance between the third lower through hole 231 and the fourth lower through hole 241 and the bottom plate 25 is L2, and L1 is greater than L2; the distance between the first upper through hole 212 and the second upper through hole 222 and the upper end of the side wall is L3, the distance between the third upper through hole 232 and the fourth upper through hole 242 and the upper end of the side wall is L4, and L4 is more than L3; because the perfusion cavity is rectangular, the transverse span of the perfusion cavity is smaller than the longitudinal span, namely the required transverse steel bars 26 are shorter than the longitudinal steel bars 27, in the steel bar mesh on the same layer of the embodiment, the transverse steel bars 26 are positioned below the longitudinal steel bars 27, the transverse steel bars 26 are short in length and have small sag, and therefore the perfusion cavity can be used for supporting the longer longitudinal steel bars 27, and the flatness of the constructed steel bar mesh is better.
The forming method of the lower layer reinforcing mesh 11 comprises the following steps: inserting a steel bar into the third lower through hole of the left baffle plate, wherein the steel bar enters the pouring cavity and penetrates out of the fourth lower through hole of the right baffle plate, so that a transverse steel bar of the lower-layer steel bar mesh is formed; and inserting reinforcing steel bars into the first lower through holes of the front baffle plate, enabling the reinforcing steel bars to enter the pouring cavity and penetrate out of the second lower through holes of the rear baffle plate, so that longitudinal reinforcing steel bars of the lower layer reinforcing mesh are formed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are mutually staggered to form the lower layer reinforcing mesh.
The forming method of the upper layer reinforcing mesh 12 comprises the following steps: inserting reinforcing steel bars into the third upper through holes of the left baffle plate, wherein the reinforcing steel bars enter the pouring cavity and penetrate out of the fourth upper through holes of the right baffle plate, so that transverse reinforcing steel bars of the upper reinforcing mesh are formed; and inserting reinforcing steel bars into the first upper through holes of the front baffle plate, enabling the reinforcing steel bars to enter the pouring cavity and penetrate out of the second upper through holes of the rear baffle plate, so that the longitudinal reinforcing steel bars of the upper-layer reinforcing mesh are formed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are mutually staggered to form the upper-layer reinforcing mesh.
As shown in fig. 8, after the upper and lower reinforcing mats 12 and 11 are formed, both ends of the transverse reinforcing bars 111 and 121 are protruded outside the mold bed, and the protruded portions are used for lap joint, so that the prefabricated hollow floor slab has better bondability.
As shown in fig. 5 to 7, the core mold 4 of the present invention includes an air cell 41 and a movable air drum 42 provided at the bottom of the air cell 41, and the movable air drum 42 is used for inflating and deflating the air cell 41. The airbag 41 is provided with a cylindrical through hole 411 in the middle, and the through hole 411 penetrates through the top surface and the bottom surface of the airbag 41. The movable air drum 42 comprises a cylinder 421 and a valve 422 arranged in the cylinder 421. The cylinder 421 is cylindrical and has a shape similar to the shape of the through hole 11 in the middle of the air bag 41; since the barrel 421 needs to be pulled repeatedly, the material should have sufficient strength, and may be metal or high-strength plastic. The valve 422 may be an electronic valve, and the valve 422 divides the cylinder 421 into an air inlet end 4212 and an air outlet end 4211. The edge of the air inlet end 4212 of the cylinder 421 is provided with a limit ring 4213, and the diameter of the limit ring 4213 is larger than that of the cylinder 421; when the hollow floor slab is prefabricated, the hollow floor slab is formed in a mould bed, a through hole for the movable air drum 42 to extend out is formed in the bottom plate of the mould bed, the limiting ring 4213 can prevent the movable air drum 42 from retracting into the mould bed, the air inlet end 4212 of the movable air drum 42 is ensured to be exposed, the air can be conveniently inflated and deflated, and meanwhile, the air bag 41 can be positioned. An air outlet 4214 communicated with the air bag 41 is arranged at an air outlet end 4211 of the cylinder 421, and a connecting surface connected with the air bag 41 is arranged at the air outlet end 4211 of the cylinder 421; in this embodiment, the connection surface and the air outlet 4214 are both disposed on the side surface of the air outlet 4211 of the cylinder 421, the end surface of the air outlet 4211 is sealed, the air outlet 4211 of the cylinder 421 is inserted into the through hole 411, the connection surface of the cylinder 421 is connected with the air bag 41 through hot melting, and after the connection surface and the air bag are connected, the cylinder 421 is communicated with the air bag 41. The air inlet end 4212 of the cylinder 421 is provided with a threaded joint, which can be an internal thread formed on the inner wall of the cylinder 421 or an external thread formed on the outer wall of the cylinder 421; this screwed joint can realize being connected with the trachea, and during prefabricated hollow floor, gasbag 41 in the hollow floor can realize intercommunication each other through the pipe network that the trachea constitutes, can unify like this and fill the gassing to all gasbags 41.
As shown in fig. 8 and 9, the transportation hoisting and the field hoisting of the prefabricated hollow floor slab are completed by using a hoisting tool, the hoisting tool 5 comprises two hoisting plates 51 clamped at two sides of the prefabricated hollow floor slab 1, and outward flanges are arranged at the top and the bottom of the hoisting plates 51 and can enhance the strength of the hoisting plates 51; in addition, the top of the hoisting plate 51 is provided with a hoisting lug 53 for fixing a hook of a crane. The hoisting plate 51 is a metal plate, a plurality of reinforcing plates 52 arranged at intervals are arranged on the outer side surface of the hoisting plate 51, the upper ends of the reinforcing plates 52 are connected with the upper flanging, and the lower ends of the reinforcing plates 52 are connected with the lower flanging; the hanging plate 51 is in a strip shape, and the reinforcing plate 52 is arranged to prevent the hanging plate 51 from deforming. The prefabricated hollow floor slab 1 of the embodiment is rectangular, and the length of the hoisting plate 51 is the same as that of the prefabricated hollow floor slab 1. The upper part and the lower part of the hoisting plate 51 are both provided with a row of through hole groups for the steel bars to pass through, and each row of through hole group consists of a plurality of through holes 54 which are arranged in a straight line along the length direction of the hoisting plate 51; the through holes 54 of each row of sets are equidistantly spaced, typically according to the spacing of the rebar placement. The two sides of the prefabricated hollow floor slab are provided with steel bars which extend out, and the extending steel bars are used for lap joint during site construction; after the prefabricated hollow floor slab 1 is formed in the mould bed, the mould bed is removed, then the two hoisting plates 51 are placed on the two sides of the prefabricated hollow floor slab 1 and tightly attached, the steel bars extending out of the prefabricated hollow floor slab 1 just pass through the through holes 54, the prefabricated hollow floor slab 1 is hoisted by utilizing the stress on the steel bars, and the steel bars form a steel bar mesh in the prefabricated hollow floor slab 1, so that the whole stress is uniform, and the floor slab structure can not be damaged by hoisting the prefabricated hollow floor slab 1 by the steel bars.
As shown in fig. 10 to 12, the prefabricated hollow floor slab of the present invention can be produced by a flow production line 6, and the production line 6 includes a reinforcing bar binding area 61, a concrete pouring area 62, a prefabricated hollow floor slab curing area 63, a conveying rail 64, a conveying trolley 65 running on the conveying rail 64, and a mold bed 2 provided on the conveying trolley 65 for molding the prefabricated hollow floor slab. The conveying track 64 sequentially penetrates through the steel bar binding area 61, the concrete pouring area 62 and the prefabricated hollow floor slab curing area 63, all the areas are organically related by utilizing the conveying trolley 65, and the flow process is realized. The rebar tying area 61, the concrete pouring area 62 and the precast hollow floor slab curing area 63 may be different workshops to increase the site operable area. The conveying track 64 is an annular conveying track 64, so that the conveying trolley 65 can operate circularly. The conveying trolley 65 comprises a trolley body 651, rollers 653 arranged at the bottom of the trolley body 651 and matched with the conveying track 64, a driving mechanism for driving the trolley body and a platform 652 arranged on the trolley body, wherein the mould bed 2 is placed on the platform 652, and workers can prick steel bars in the mould bed 2. A concrete pouring device is arranged in the concrete pouring area 62, the concrete pouring device comprises a container for storing and stirring concrete, a conveying pipeline and a pouring gun, one end of the conveying pipeline is connected with the container, and the other end of the conveying pipeline is connected with the pouring gun; the container can provide concrete continuously, and the filling gun can facilitate workers to fill concrete into the mould bed 2. A placing frame 67 is arranged in the curing area 63 of the prefabricated hollow floor slab, and supporting plates 671 arranged in a stacked mode are arranged on the placing frame 67; because the prefabricated hollow floor slab has a large area and needs a certain time for curing, the space occupied by the prefabricated hollow floor slab can be reduced by adopting a stacking mode, the stock-keeping rate of the prefabricated hollow floor slab is improved, and the curing of concrete is not influenced.
Compared with a cast-in-place building, the assembled building can greatly reduce the emission of construction wastes in the construction stage, reduce carbon emission and poplar dust and noise pollution brought to the environment, and is beneficial to improving the urban environment, improving the comprehensive quality and performance of the building and promoting ecological civilized construction. The state vigorously develops steel structures, concrete and other assembly type buildings, develops new energy-saving and environment-friendly industries, improves the safety level of the buildings, and promotes the surplus capacity of chemical decomposition. The floor slab is an important component of a building structure and accounts for a considerable proportion of the cost of the building structure, the development of the prefabricated floor slab technology is very important for implementing the prefabricated building, and the prefabricated hollow floor slab can reduce the self weight of the floor slab, so that the building material is saved.
Claims (5)
1. A construction method of a prefabricated hollow floor slab is characterized by comprising the following steps:
(1) binding steel bars in a mould bed to form a lower layer of steel bar mesh, an upper layer of steel bar mesh and rib beams, wherein the rib beams are criss-cross to form a plurality of rectangular areas; the mould bed comprises a bottom plate and a side wall, and a perfusion cavity is defined by the bottom plate and the side wall;
(2) a core mould is placed in a rectangular area formed by the longitudinal and transverse rib beams, the core mould comprises an air bag and a movable air drum arranged at the bottom of the air bag, and the movable air drum penetrates through a bottom plate of the mould bed and then is connected with a pipe network;
(3) the air pump uniformly inflates the core mould in the mould bed through a pipe network, and the core mould is inflated and then is expanded and positioned between the upper layer reinforcing mesh and the lower layer reinforcing mesh;
(4) pouring concrete into the pouring cavity of the mould bed;
(5) after the concrete is cured, the core die can form a cavity in the concrete;
(6) air in the core mould is pumped out by an air pump, and the core mould shrinks and is separated from the concrete;
(7) when the volume of the core mould is reduced to a certain degree, the prefabricated hollow floor slab is lifted, on the other hand, the bottom plate of the mould bed is fixed, at the moment, the core mould and the prefabricated hollow floor slab move relatively, and all the core moulds can be drawn out at one time, so that the prefabricated hollow floor slab is manufactured;
the movable air drum comprises a cylinder body and a valve arranged in the cylinder body, the valve divides the cylinder body into an air inlet end and an air outlet end, the air outlet end of the cylinder body is provided with an air outlet hole communicated with the air bag, and the air outlet end of the cylinder body is provided with a connecting surface connected with the air bag; the connecting surface and the air outlet hole are arranged on the side surface of the air outlet end of the cylinder body, a through hole is formed in the middle of the air bag, and the air outlet end of the cylinder body is inserted into the through hole.
2. The construction method of a prefabricated hollow floor slab as claimed in claim 1, wherein: the side wall comprises a left baffle, a right baffle, a front baffle and a rear baffle, wherein the left baffle and the right baffle are arranged oppositely, and the front baffle and the rear baffle are arranged oppositely; the lower part of the front baffle is provided with first lower through holes which are arranged in a straight line, and the upper part of the front baffle is provided with first upper through holes which are arranged in a straight line; the lower part of the rear baffle is provided with second lower through holes which are arranged in a straight line, and the upper part of the rear baffle is provided with second upper through holes which are arranged in a straight line; the first lower through holes correspond to the second lower through holes one by one, and the first upper through holes correspond to the second upper through holes one by one; the lower part of the left baffle is provided with third lower through holes which are arranged in a straight line, and the upper part of the left baffle is provided with third upper through holes which are arranged in a straight line; the lower part of the right baffle is provided with fourth lower through holes which are arranged in a straight line, and the upper part of the right baffle is provided with fourth upper through holes which are arranged in a straight line; the third lower through holes correspond to the fourth lower through holes one by one, and the third upper through holes correspond to the fourth upper through holes one by one.
3. The construction method of a prefabricated hollow floor slab as claimed in claim 2, wherein: inserting a steel bar into the third lower through hole of the left baffle plate, wherein the steel bar enters the pouring cavity and penetrates out of the fourth lower through hole of the right baffle plate, so that a transverse steel bar of the lower-layer steel bar mesh is formed; and inserting reinforcing steel bars into the first lower through holes of the front baffle plate, enabling the reinforcing steel bars to enter the pouring cavity and penetrate out of the second lower through holes of the rear baffle plate, so that longitudinal reinforcing steel bars of the lower layer reinforcing mesh are formed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are mutually staggered to form the lower layer reinforcing mesh.
4. The construction method of a prefabricated hollow floor slab as claimed in claim 2, wherein: inserting reinforcing steel bars into the third upper through holes of the left baffle plate, wherein the reinforcing steel bars enter the pouring cavity and penetrate out of the fourth upper through holes of the right baffle plate, so that transverse reinforcing steel bars of the upper reinforcing mesh are formed; and inserting reinforcing steel bars into the first upper through holes of the front baffle plate, enabling the reinforcing steel bars to enter the pouring cavity and penetrate out of the second upper through holes of the rear baffle plate, so that the longitudinal reinforcing steel bars of the upper-layer reinforcing mesh are formed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are mutually staggered to form the upper-layer reinforcing mesh.
5. The construction method of a prefabricated hollow floor slab as claimed in claim 1, wherein: adopt lifting device to hoist prefabricated hollow floor, lifting device includes two blocks of centre gripping hoisting plates in prefabricated hollow floor both sides, the top of hoisting plate is equipped with the hoist and mount ear, the upper portion and the lower part of hoisting plate all are equipped with one row of through-hole group that supplies the reinforcing bar to pass, and every row of through-hole group comprises a plurality of through-holes of arranging in a line along the length direction of hoisting plate.
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| CN201710731788.7A CN107471427B (en) | 2017-08-23 | 2017-08-23 | Construction method of prefabricated hollow floor slab |
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| CN201710731788.7A CN107471427B (en) | 2017-08-23 | 2017-08-23 | Construction method of prefabricated hollow floor slab |
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| CN107471427B true CN107471427B (en) | 2020-06-23 |
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| GB2574406B (en) * | 2018-06-04 | 2020-07-08 | Pbp Berlani Holding Ltd | Improvements in or relating to building structures |
| CN112497436A (en) * | 2020-11-27 | 2021-03-16 | 王蒙蒙 | Concrete prefabricated part auxiliary manufacturing system |
| CN113211598A (en) * | 2021-05-28 | 2021-08-06 | 天津三建建筑工程有限公司 | Prefabricated assembly type concrete equipment foundation module, mold and manufacturing and mounting method |
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| CN105908887A (en) * | 2016-06-24 | 2016-08-31 | 重庆道同建材有限公司 | Airbag core mold component cast hollow floor construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1114738C (en) * | 1999-11-22 | 2003-07-16 | 邱则有 | In-situ cast hollow reinforced concrete slab pre-provided with hollow hard thin-wall members and its construction method |
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| CN1644834A (en) * | 2005-01-28 | 2005-07-27 | 刘国模 | Construction of steel bar reinforced hollow concrete floor cast-in-situs |
| KR20100083215A (en) * | 2009-01-13 | 2010-07-22 | 차희장 | Method for manufacturing imitation stone panel |
| CN201456210U (en) * | 2009-03-23 | 2010-05-12 | 于永久 | Inner core of circular hole of shaped building element |
| CN102581939A (en) * | 2012-02-23 | 2012-07-18 | 清华大学建筑设计研究院有限公司 | Prefabricated reinforced concrete hollow template internally provided with cross holes and molding and forming device thereof |
| CN105908887A (en) * | 2016-06-24 | 2016-08-31 | 重庆道同建材有限公司 | Airbag core mold component cast hollow floor construction method |
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Granted publication date: 20200623 |