CN112982777A - Construction process of light prefabricated assembly type space net rack ribbed floor - Google Patents
Construction process of light prefabricated assembly type space net rack ribbed floor Download PDFInfo
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- CN112982777A CN112982777A CN202110426116.1A CN202110426116A CN112982777A CN 112982777 A CN112982777 A CN 112982777A CN 202110426116 A CN202110426116 A CN 202110426116A CN 112982777 A CN112982777 A CN 112982777A
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- floor slab
- formwork
- rib
- keel
- ribbed floor
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- 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
- E04B5/17—Floor structures partly formed in situ
- E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
- E04B5/28—Cross-ribbed floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses a construction process of a light prefabricated assembly type space grid frame ribbed floor slab, which comprises the following steps: s1) prefabricating a ribbed floor slab template; s2) in the process of manufacturing the ribbed floor slab template, synchronously building a steel pipe support frame and a main keel; s3) hoisting the ribbed floor slab template prefabricated in the step S1) to the main keel, wherein the metal keel is perpendicular to the main keel; s4) using an edge template to seal the edge gap between the ribbed floor template and the shear wall, beam or column; s5) laying plate distribution steel bars and construction steel bars on the multi-ribbed floor slab template; s6) pouring concrete to fill the rib beam grooves, and wrapping the plate distribution steel bars inside to form a ribbed floor slab; s7), concrete curing, form removal and ribbed floor forming are completed. The invention greatly improves the manufacturing efficiency of the floor slab, shortens the construction period, improves the strength of the floor slab, reduces the comprehensive cost of the floor slab, and conforms to the green energy-saving building.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of floor construction, and particularly relates to a construction process of a light prefabricated assembly type space grid frame ribbed floor.
[ background of the invention ]
The ribbed floor, hollow floor and cast-in-place beam slab floor in the existing market are all that a main keel is erected on a support frame, a required square wood secondary keel is erected on the main keel according to the space size of the floor, a template is laid on the square wood, then an axis and a rib beam size line are manually placed on the template, rib beam reinforcing steel bars and rib beam stirrups are manually manufactured, and then a filling box or a disposable formwork is placed in a grid formed by the rib beams in a crossed mode according to a construction drawing, so that the biggest defect is that the filling box or the disposable formwork is permanently pre-buried, cannot be reused, and the corresponding cost is increased; or the reusable formwork is erected according to the traditional square timber and the formwork, the high-altitude operation is performed on the spot for paying off, then the formwork is placed at the corresponding floor position to be used, the using amount of the square timber secondary keel is not reduced, the using amount of the formwork is not reduced or reduced to be limited, the workload of a high-altitude rib beam laying line is increased, a filling box or the formwork is not placed manually in an accurate positioning mode, so that the box or the formwork is easy to shift, the derived problems that the rib beams are not on the same line or the width of the rib beams is not uniform are generated, the operation safety risk is not convenient and increased, the assembly type industrial policy is not met, and the corresponding quality safety hazard is increased due to the uneven rib width caused by the formwork shift; the artificial rib beam steel bar has the following problems: firstly, increase field work volume extension time limit for a project, secondly the rib stirrup interval differs, and three are the rib size not of uniform size, and four are the reinforcing bar protective layer thickness differs, and these all can reduce designer's structural safety performance.
Therefore, it is necessary to provide a new construction process of light prefabricated assembly type space grid multi-ribbed floor to solve the above technical problems.
[ summary of the invention ]
The invention mainly aims to provide a construction process of a light prefabricated assembly type space net rack ribbed floor slab, which has the advantages of light self weight, high bearing capacity, simplicity in manufacture, precision in positioning, uniform reinforcing steel bar protective layer, uniform width of longitudinal and transverse rib beams, no loss, flat land operation and high safety, is convenient to hoist and mount the floor slab with connecting piece screw holes, saves a large amount of labor and material investment, reduces the comprehensive cost of the floor slab, and accords with green energy-saving buildings.
The invention realizes the purpose through the following technical scheme: a construction process of a light prefabricated assembly type space net rack ribbed floor slab comprises the following steps:
s1) prefabricating a ribbed floor slab template; the multi-ribbed floor slab template comprises a plurality of metal keels arranged in parallel at intervals, and a plurality of formworks with two sides erected on two adjacent metal keels, wherein the formworks in the same row between the two adjacent metal keels are arranged in a gapless manner, criss-cross rib beam grooves are formed between all the formworks and the metal keels in a surrounding manner, truss units which are perpendicular to the metal keels are arranged in the rib beam grooves in the same row, lower longitudinal ribs and upper longitudinal ribs which are parallel to the metal keels are arranged in the rib beam grooves in the same row, truss connecting pieces are locked on the metal keels, and the truss units, the lower longitudinal ribs and the upper longitudinal ribs are integrally and detachably locked on the metal keels through the truss connecting pieces;
s2) building a steel tube support frame and a main keel;
s3) hoisting the ribbed floor slab template prefabricated in the step S1) to the built main keel, wherein the metal keel is perpendicular to the main keel;
s4) using an edge template to seal the edge gap between the ribbed floor template and a shear wall, or a beam, or a column cap;
s5) laying plate distribution steel bars and construction steel bars on the multi-ribbed floor slab template;
s6) pouring concrete to fill the rib beam grooves, and wrapping the plate distribution steel bars inside to form a ribbed floor slab;
s7), concrete curing, form removal and ribbed floor forming are completed.
Furthermore, the top of the metal keel is provided with a keel top surface, formwork shell supporting surfaces positioned at two sides of the keel top surface, and a formwork positioning clamping groove which is arranged between the keel top surface and the formwork shell supporting surfaces and is formed by downward sinking.
Further, the formwork comprises a bottom plate, a hollow shell and formwork clamping strips, wherein the bottom plate is erected on the supporting surface of the formwork, the hollow shell is upwards protruded from the surface of the bottom plate, and the formwork clamping strips are downwards extended from two sides of the bottom plate to form a positioning clamping groove matched with the formwork; the upper surface of the bottom plate is provided with a formwork reference surface distributed around the shell; the formwork datum plane is flush with the top surface of the keel.
Furthermore, the truss connecting piece comprises at least one pair of connecting screw rods, a supporting bottom sleeve, a lower supporting plate, an upper pressing plate and a nut, wherein the supporting bottom sleeve is arranged on the connecting screw rods in an adjustable mode, the lower supporting plate is sleeved on the pair of connecting screw rods and supported by the supporting bottom sleeve, the upper pressing plate is sleeved on the pair of connecting screw rods and presses the upper longitudinal ribs, and the nut is used for locking the upper pressing plate on the connecting screw rods.
Further, the step S1) includes the following steps:
s11) mounting the connecting screw and the lower supporting plate on the metal keel;
s12) placing the metal keels provided with the connecting screw rods and the lower supporting plates in parallel according to the rib spacing;
s13) laying a formwork between two adjacent metal keels, wherein two sides of the formwork are erected on the formwork supporting surface of the metal keels, and the formwork clamping strips at the two sides are clamped in the formwork positioning clamping grooves; the connecting screw rods are positioned at the longitudinal and transverse intersection positions in the rib beam grooves;
s14) placing lower longitudinal ribs parallel to the metal keels on the lower supporting plate;
s15) placing truss units vertical to the metal keels on the lower longitudinal ribs of the lower supporting plate;
s16) placing upper longitudinal bars perpendicular to the truss units on the truss units;
s17) installing an upper pressure plate on the connecting screw rod, locking the upper pressure plate by using a nut, and further locking a steel bar grid structure consisting of the lower longitudinal bar, the truss unit and the upper longitudinal bar on the metal keel to form the ribbed floor slab template.
Further, the truss unit is of a planar truss structure or a three-dimensional truss structure and comprises an upper main rib, a lower main rib and a connecting rib for connecting the upper main rib and the lower main rib; the truss unit is located between the lower longitudinal rib and the upper longitudinal rib.
Furthermore, a plurality of bolt holes are formed in the top surface of the keel, and the bolt holes penetrate through the upper surface and the lower surface of the metal keel;
and the step S11) comprises the steps of penetrating the connecting screw rods into the bolt holes from the lower part of the metal keel, then screwing the support bottom sleeve into the top surface of the metal keel, tightly attaching the support bottom sleeve to the top surface of the metal keel, then sleeving the two sides of the lower supporting plate on the connecting screw rods, and moving the lower supporting plate downwards to be placed on the support bottom sleeve.
Furthermore, a first limiting groove and a second limiting groove perpendicular to the first limiting groove are formed in the lower supporting plate, a first plane structure is arranged on two sides of the first limiting groove, and a through hole is formed in the first plane structure and used for penetrating through the connecting screw rod; the lower longitudinal ribs are placed in first limiting grooves of the lower supporting plate, and the lower main ribs in the truss units are placed in second limiting grooves of the lower supporting plate.
Furthermore, a third limiting groove and a fourth limiting groove perpendicular to the third limiting groove are arranged on the upper pressure plate, a second plane structure is arranged on two sides of the third limiting groove, and a through hole is formed in the second plane structure and used for penetrating through the connecting screw rod; the third limiting groove in the upper pressing plate is clamped on the upper longitudinal rib, and the fourth limiting groove is clamped on the upper main rib of the truss unit.
Furthermore, the ribbed floor slab comprises a floor structure and a rib beam structure positioned on the lower surface of the floor structure, wherein the rib beam structure is of a criss-cross structure, and a plurality of formwork evacuation cavities are formed after the formworks are disassembled.
Compared with the prior art, the construction process of the light prefabricated assembly type space grid frame ribbed floor slab has the beneficial effects that: the template is characterized in that a turnover formwork made of aluminum alloy or plastic materials with light dead weight and high strength is adopted, a metal keel with a clamping groove, a connecting piece, a truss (a planar truss/3D truss), a lower longitudinal rib and an upper longitudinal rib are quickly assembled and combined on a flat ground on site, so that a space grid multi-ribbed floor template free of formwork supporting, wire releasing, positioning and high strength is formed, all or part of reinforcing steel bars of a rib beam are replaced by the truss (the planar truss/3D truss), the longitudinal ribs and the connecting piece, the bearing capacity of the reinforcing steel bar grid is improved, the thickness of a reinforcing steel bar protective layer is ensured, and the workload of the rib beam. Hoisting to the corresponding floor slab position as required, then plugging the marginal gap with a small amount of templates, and completing the template building of the whole floor slab; and then laying structural steel bars among upper flange distributed steel bars, plates, beams, columns (column caps) or shear walls, when the quantity of the designed rib beam steel bars is greater than that of the truss steel bars or that of the longitudinal steel bars, adding required steel bars in rib grooves parallel to the rib grooves, embedding pipelines of the pipelines, pouring concrete, removing the steel bar support frames, the main keels, the metal keels, the formworks and the edge formworks after in-place maintenance, and finishing the manufacture of the space truss dense rib cast-in-place floor slab. The construction process of this scheme ribbed floor has that the dead weight is light, bear the weight of the dynamic height, simple manufacture, the location is accurate, the reinforcing bar protective layer is even, move about freely and quickly the rib roof beam width unanimous, lossless, level land operation, security height, floor from taking convenient hoist and mount of connecting piece screw to save the trompil, save a large amount of manual works, material input, reduce the comprehensive cost of floor, accord with green energy-conserving building.
[ description of the drawings ]
FIG. 1 is a schematic view of a partial structure of a ribbed floor form according to an embodiment of the invention;
figure 2 is a schematic structural view of a metal keel according to an embodiment of the invention;
FIG. 3 is a schematic view of a formwork arrangement of an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a formwork embodiment of the present invention;
FIG. 5 is a schematic view of the assembly of a metal keel and a formwork in an embodiment of the invention;
FIG. 6 is a schematic structural view of a truss attachment member in an embodiment of the invention;
FIG. 7 is another schematic structural view of a truss attachment member in an embodiment of the invention;
FIG. 8 is a schematic view of the connection structure of the truss connection member with the planar truss structure, the lower longitudinal ribs and the upper longitudinal ribs according to the embodiment of the present invention;
FIG. 9 is a schematic view of a connection structure of the truss connection member with the three-dimensional truss structure, the lower longitudinal ribs and the upper longitudinal ribs in the embodiment of the present invention;
fig. 10 is a partially enlarged schematic view of a reinforcing bar net rack structure according to an embodiment of the present invention;
FIG. 11 is a schematic view of the overall structure of a ribbed floor form in an embodiment of the invention;
FIG. 12 is a structural diagram of a ribbed floor slab template in the embodiment of the invention in a state of being hoisted to a main keel and a steel pipe support frame;
FIG. 13 is a schematic structural view of the edge form after being laid in the embodiment of the present invention;
FIG. 14 is a schematic structural view of a concrete cast condition according to an embodiment of the present invention;
FIG. 15 is a schematic structural view of a ribbed floor form according to an embodiment of the present invention;
figure 16 is a schematic cross-sectional view taken perpendicular to the metal runner prior to removal of the form of the embodiment of the present invention;
figure 17 is a structural schematic view of a cross-section taken perpendicular to the metal runner after removal of the form of the embodiment of the present invention;
figure 18 is a schematic cross-sectional view of the embodiment of the invention taken parallel to the metal runner prior to removal;
figure 19 is a structural schematic view of the embodiment of the present invention in a cross-sectional state parallel to the metal runner after removal of the form;
the figures in the drawings represent:
100 ribbed floor slab formworks; 200 multi-ribbed floors, 201 rib beam structures, 202 floor surface structures and 203 formwork evacuation cavities;
1, a metal keel, 11T-shaped bolt grooves, 12 keel top surfaces, 121 bolt holes, 13 formwork and formwork supporting surfaces, 131 formwork positioning lines and 14 formwork positioning clamping grooves;
2, formwork, 21 bottom plate, 211 formwork datum plane, 22 shell, 221 cavity, 222 air hole, 223 inclined plane structure, 224 reinforcing rib and 23 formwork clamping bar;
3 rib beam grooves;
4 truss units, 41 planar truss structures, 411 first lower main ribs, 412 first upper main ribs, 413 first connecting ribs, 42 three-dimensional truss structures, 421 second lower main ribs, 422 third lower main ribs, 423 second upper main ribs, 424 second connecting ribs and 425 third connecting ribs;
5, lower longitudinal ribs; 6, arranging longitudinal ribs;
7 truss connecting pieces, 71 connecting screws, 711 lower sections, 712 upper sections, 72 supporting bottom sleeves, 73 lower supporting plates, 731 first limiting grooves, 732 second limiting grooves, 733 first plane structures, 74 upper pressing plates, 741 third limiting grooves, 742 fourth limiting grooves, 743 second plane structures and 75 nuts;
8, a steel pipe support frame; 9, main keel; 10, edge template; 11 plates distribute the steel bars.
[ detailed description ] embodiments
Example (b):
referring to fig. 1 to 19, the present embodiment of a construction process of a light prefabricated assembly type space grid multi-ribbed floor slab includes the following steps:
s1) prefabricating a ribbed floor slab formwork 100;
close rib floor template 100 includes a plurality of metal joist 1 that parallel interval set up, a plurality of formworks 2 on two adjacent metal joist 1 are established to both sides, same row of formwork 2 zero clearance between two adjacent metal joist 1 sets up in turn, around forming vertically and horizontally staggered rib groove 3 between all formworks 2 and the metal joist 1, be provided with truss unit 4 with metal joist 1 vertical distribution in the same row of rib groove 3, be provided with in the same row of rib groove 3 with metal joist 1 parallel distribution's lower vertical bar 5 and last vertical bar 6, the last locking of metal joist 1 has truss connection 7, truss unit 4, lower vertical bar 5 and last vertical bar 6 wholly pass through truss connection 7 detachable locking on metal joist 1.
The manufacturing steps of the ribbed floor slab formwork 100 include:
s11) providing the metal keel 1 and the truss connection member 7;
the metal keel 1 is of an aluminum alloy section structure, the top of the metal keel 1 is provided with a keel top surface 12, formwork shell supporting surfaces 13 which are positioned at two sides of the keel top surface 12 and have a height difference with the keel top surface 12, and a formwork positioning clamping groove 14 which is arranged between the keel top surface 12 and the formwork shell supporting surfaces 13 and is formed by downward sinking; a plurality of bolt holes 121 are further formed in the top surface 12 of the keel, and the bolt holes 121 penetrate through the upper surface and the lower surface of the metal keel 1; the formwork shell support surface 13 is provided with a plurality of formwork locating lines 131.
The truss connecting member 7 includes at least a pair of connecting screws 71, a supporting bottom sleeve 72 disposed on the connecting screws 71 and adjustable in vertical position, a lower supporting plate 73 having two sides sleeved on the pair of connecting screws 71 and supported by the supporting bottom sleeve 72, an upper pressing plate 74 having two sides sleeved on the pair of connecting screws 71, and a nut 75 locking the upper pressing plate 74 on the connecting screws 71.
S12) installing a connecting screw rod 71 and a lower supporting plate 73 on the metal keel 1;
the connecting screw rod 71 penetrates through the bolt hole 121 from the lower part of the metal keel 1, then the supporting bottom sleeve 72 is screwed and tightly attached to the keel top surface 12 of the metal keel 1, and then the two sides of the lower supporting plate 73 are sleeved on the connecting screw rod 71 and are moved downwards to be placed on the supporting bottom sleeve 72.
S13) placing the metal keels 1 provided with the connecting screw rods 71 and the lower supporting plates 73 in parallel according to the rib spacing;
s14) laying the formwork 2 between every two adjacent metal keels 1, wherein all the formwork 2 and the metal keels 1 surround to form criss-cross rib grooves 3, and the connecting screw rods 71 are positioned at the criss-cross intersection positions in the rib grooves 3;
wherein, the whole mould shell 2 is an aluminum alloy structure or a plastic material structure. The formwork 2 comprises a bottom plate 21 and a hollow shell 22 which is raised upwards from the surface of the bottom plate 21, a formwork reference surface 211 distributed around the shell 22 is formed on the upper surface of the bottom plate 21, and formwork clamping strips 23 matched with the formwork positioning clamping grooves 14 are arranged on the opposite side edges of the bottom plate 21 in a downward extending mode. The formwork reference surface 211 is flush with the keel top surface 12.
When the formwork 2 is laid, two sides of the formwork 2 are erected on the formwork supporting surface 13 of the formwork, the formwork clamping strips 23 on the two sides are clamped in the formwork positioning clamping grooves 14 to realize positioning, and the front end and the rear end of the formwork 2 correspond to and are aligned with the formwork positioning line 131; the formworks 2 in the same row are arranged in a gapless manner, the formworks 2 in the same row are correspondingly aligned, and the corresponding consistency of the space between the longitudinal rib beam grooves and the transverse rib beam grooves 3 is kept.
S15) placing the lower longitudinal ribs 5 parallel to the metal keel 1 on the lower supporting plate 73.
The lower supporting plate 73 is provided with a first limiting groove 731 and a second limiting groove 732 perpendicular to the first limiting groove 731, two sides of the first limiting groove 731 are provided with first plane structures 733, and the first plane structures 733 are provided with through holes for penetrating through the connecting screw 71. The lower longitudinal rib 5 is placed in the first limiting recess 731 of the lower plate 73.
S16) placing truss units 4 perpendicular to the metal joists 1 on the upper and lower longitudinal ribs 5 of the lower supporting plate 73.
The lower main rib of the truss unit 4 is placed in the second limit recess 732 of the lower blade 73.
S17) placing the upper longitudinal bars 6 perpendicular to the truss units 4 on the truss units 4.
S18) installing an upper press plate 74 on the connecting screw 7, and locking the upper press plate 74 with a nut 75, thereby locking the reinforcing steel bar grid structure consisting of the lower longitudinal bar 5, the truss unit 4 and the upper longitudinal bar 6 on the metal keel 1, and forming the ribbed floor slab formwork 100.
The upper press plate 74 is provided with a third limiting groove 741 and a fourth limiting groove 742 perpendicular to the third limiting groove 741, two sides of the third limiting groove 741 are provided with second plane structures 743, and the second plane structures 743 are provided with through holes for penetrating the connecting screw 71. Wherein, the third limiting groove 741 in the upper press plate 74 is clamped on the upper longitudinal rib 6, and the fourth limiting groove 742 is clamped on the upper main rib of the truss unit 4.
S2) in the process of manufacturing the ribbed floor slab formwork 100, the steel pipe support frame 8, the main keel 9, and the formwork of the shear wall, the beam, the column and the column cap are synchronously built.
Wherein, the main joist 9 is parallel to the top of the steel tube support frame 8 at intervals.
S3) hoisting the ribbed floor slab template 100 prefabricated in the step S1) to the main keel 9, and placing the metal keel 1 perpendicular to the main keel 9.
S4) edge forms 10 are used to block the edge voids between the ribbed floor form 100 and the shear wall, beam, column.
S5) laying plate distribution reinforcing bars 11 and construction reinforcing bars on the multi-ribbed floor slab formwork 100, wherein the plate distribution reinforcing bars 11 comprise longitudinal reinforcing bars and transverse reinforcing bars distributed in a criss-cross manner.
S6) pouring concrete to fill the rib beam grooves 3, and wrapping the plate distribution steel bars 11 inside to form the ribbed floor slab 200.
The ribbed floor slab 200 comprises a floor structure 202, a rib beam structure 201 on the lower surface of the floor structure 202.
The concrete filled in the rib beam groove 3 wraps the truss unit 4, the lower longitudinal bar 5 and the upper longitudinal bar 6 to form a rib beam structure 201, and the concrete portion wrapped by the plate distribution steel bars 11 is molded to form a floor surface structure 202 of the multi-ribbed floor slab 200.
S7), concrete curing, dismantling the steel tube support frame 8, the main keel 9, the metal keel 1, the edge template 10 and the formwork 2, and finishing the forming of the ribbed floor slab 200.
The rib structures 201 are criss-cross structures and form a plurality of formwork evacuation cavities 203 after formwork 2 is removed.
The length of the metal keel 1 can be the same as the designed length of the floor slab, or can be formed by splicing a plurality of sections according to the designed length of the floor slab.
The metal keel 1 is divided into a formwork installation area and a formwork installation area along the length direction of the formwork positioning line 131. The formwork positioning line 131 allows, on the one hand, a quick positioning of the assembly position of the edge formwork 3 and, on the other hand, also of the formwork 2. The distance between the formwork positioning lines 131 can be flexibly set according to the widths of the formwork and the formwork, so that the assembling efficiency and convenience of the formwork and the formwork are greatly improved.
The top surface of the housing 22 is a planar structure and is provided with an air hole 222 communicated with the inner cavity 221. The four outer peripheral surfaces of the housing 22 are beveled structures 223. The overall height of the housing 22 is 50 to 800 mm. The design of the air hole 222 and the inclined plane structure 223 is more beneficial to the demoulding of the formwork 2. The thickness of the inner wall of the housing 22 is 1 to 5 mm. The inner wall surface of the housing 22 is uniformly provided with a plurality of reinforcing ribs 224.
The front and back end surfaces of the bottom plate 21 are planar structures or end surface structures which can be matched with each other to form a gapless butt joint structure. So that a plurality of the formworks 2 can be arranged side by side in the front and back after being assembled on the metal keel 1, and the assembling efficiency and the assembling convenience of the formworks are greatly improved.
The truss unit 4 is a planar truss structure 41 or a three-dimensional truss structure 42. The planar truss structure 41 includes a first lower main rib 411, a first upper main rib 412 located above the first lower main rib 411, and a first connecting rib 413 connecting the first upper main rib 412 and the first lower main rib 411. The first connecting rib 413 is integrally wavy and is welded to the corresponding first upper main rib 412 or the corresponding first lower main rib 411 at the wave crest and the wave trough. The three-dimensional truss structure 42 includes a second lower main rib 421 and a third lower main rib 422 which are located on the same plane and are arranged in parallel, a second upper main rib 423 which forms a triangular structure with the second lower main rib 421 and the third lower main rib 422, a second connecting rib 424 which connects the second lower main rib 421 and the second upper main rib 423, and a third connecting rib 425 which connects the third lower main rib 433 and the second upper main rib 423. The second connecting rib 424 and the third connecting rib 425 are integrally wavy, and are welded together with the corresponding second upper main rib 423 or the second lower main rib 421 or the third lower main rib 422 at the wave crest and the wave trough.
The truss unit 4 is located between the lower longitudinal bar 5 and the upper longitudinal bar 6. The truss connecting pieces 7 are arranged on the metal keels 1 and are located at the criss-cross positions of the rib beam grooves 3.
The head of the connecting screw rod 71 abuts against the lower surface of the metal keel 1 to realize limiting, and the screw rod part of the connecting screw rod 71 penetrates through the bolt hole 121 in the metal keel 1 and extends upwards to the position above the upper longitudinal rib 6. The supporting bottom sleeve 72 is arranged on the connecting screw rod 71 in a threaded fit mode, the heads of the supporting bottom sleeve 72 and the connecting screw rod 71 are respectively located on the upper surface and the lower surface of the metal keel 1, and the supporting bottom sleeve 72 and the connecting screw rod 71 are matched with each other to lock the connecting screw rod 71 on the metal keel 1. The supporting bottom cover 72 also has the function of supporting and positioning the lower supporting plate 73, thereby limiting the height of the lower longitudinal rib 5.
In another embodiment, the connecting screw 71 may be a two-segment structure, which includes a lower segment 711 and an upper segment 712, the length of the lower segment 711 matches the thickness of the metal keel 1, and the supporting bottom sleeve 72 is screwed on the top of the lower segment 711 by a screw thread fit. The support shoe 72 may be fixedly disposed at the bottom of the upper section 712 or the upper section 712 may be screwed into a threaded hole of the support shoe 72 for attachment by a threaded fit. Through the design of two segmentation structures, the form removal of metal joist 1 of being convenient for, when form removal, back twist out lower section 711 from supporting the end cover 72, realize with the separation of supporting end cover 72, remove the upper and lower restriction to metal joist 1, then pull down metal joist 1 can.
The lower longitudinal ribs 5 are erected in the first limiting grooves 731, the lower main ribs in the truss units 4 are placed in the second limiting grooves 732, the lower longitudinal ribs 5 are arranged below, the lower main ribs in the truss units 4 are arranged above, and the lower longitudinal ribs 5 and the truss units 4 are supported through the lower supporting plate 73.
The upper longitudinal rib 6 is clamped in the third limiting groove 741, the upper main rib in the truss unit 4 is clamped in the fourth limiting groove 742, the upper main rib in the truss unit 4 is arranged below, the upper longitudinal rib 6 is arranged above, the upper longitudinal rib 6 and the truss unit 4 are pressed downwards through the upper pressing plate 74, and the upper pressing plate 74 is locked downwards through the nut 75.
The truss connecting member 7 can be provided with two connecting screw rods 71 or four connecting screw rods 71 according to requirements.
The utility model provides a construction technology of light-duty prefabricated assembled space rack ribbed floor, the mould shell that can have enough to meet need that adopts the high aluminum alloy of dead weight light intensity or plastic material preparation, the metal joist of taking the draw-in groove, the connecting piece, the truss (plane truss 3D truss), indulge muscle down and indulge the muscle and go up and indulge the muscle and assemble the combination fast on the scene level land, constitute and exempt from the formwork, exempt from the unwrapping wire, the location is accurate, space rack ribbed floor template that intensity is high, use truss (plane truss 3D truss), indulge the muscle, the connecting piece replaces all or partial reinforcing bar of rib roof beam, promote the bearing capacity of reinforcing bar rack, guarantee reinforcing bar protective layer thickness. Hoisting to the corresponding floor slab position as required, then plugging the marginal gap with a small amount of templates, and completing the template building of the whole floor slab; and then laying structural steel bars among upper flange distributed steel bars, plates, beams, columns (column caps) or shear walls, when the quantity of the designed rib beam steel bars is greater than that of the truss steel bars or that of the longitudinal steel bars, adding required steel bars in rib grooves parallel to the rib grooves, embedding pipelines of the pipelines, pouring concrete, removing the steel bar support frames, the main keels, the metal keels, the formworks and the edge formworks after in-place maintenance, and finishing the manufacture of the space truss dense rib cast-in-place floor slab. The construction process of this scheme ribbed floor has that the dead weight is light, bear the weight of the dynamic height, simple manufacture, the location is accurate, the reinforcing bar protective layer is even, move about freely and quickly the rib roof beam width unanimous, lossless, level land operation, security height, floor from taking convenient hoist and mount of connecting piece screw to save the trompil, save a large amount of manual works, material input, reduce the comprehensive cost of floor, accord with green energy-conserving building.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a construction technology of light-duty prefabricated assembled space rack ribbed floor which characterized in that: which comprises the following steps:
s1) prefabricating a ribbed floor slab template; the multi-ribbed floor slab template comprises a plurality of metal keels arranged in parallel at intervals, and a plurality of formworks with two sides erected on two adjacent metal keels, wherein the formworks in the same row between the two adjacent metal keels are arranged in a gapless manner, criss-cross rib beam grooves are formed between all the formworks and the metal keels in a surrounding manner, truss units which are perpendicular to the metal keels are arranged in the rib beam grooves in the same row, lower longitudinal ribs and upper longitudinal ribs which are parallel to the metal keels are arranged in the rib beam grooves in the same row, truss connecting pieces are locked on the metal keels, and the truss units, the lower longitudinal ribs and the upper longitudinal ribs are integrally and detachably locked on the metal keels through the truss connecting pieces;
s2) building a steel tube support frame and a main keel;
s3) hoisting the ribbed floor slab template prefabricated in the step S1) to the built main keel, wherein the metal keel is perpendicular to the main keel;
s4) using an edge template to seal the edge gap between the ribbed floor template and a shear wall, or a beam, or a column cap;
s5) laying plate distribution steel bars and construction steel bars on the multi-ribbed floor slab template;
s6) pouring concrete to fill the rib beam grooves, and wrapping the plate distribution steel bars inside to form a ribbed floor slab;
s7), concrete curing, form removal and ribbed floor forming are completed.
2. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 1, wherein: the top of the metal keel is provided with a keel top surface, formwork supporting surfaces positioned at two sides of the keel top surface, and a formwork positioning clamping groove which is arranged between the keel top surface and the formwork supporting surfaces and is formed by downward sinking.
3. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 2, wherein: the formwork comprises a bottom plate, a hollow shell and formwork clamping strips, wherein the bottom plate is erected on a supporting surface of the formwork, the shell is upwards bulged from the surface of the bottom plate and is hollow inside, and the formwork clamping strips extend downwards from two sides of the bottom plate to form a positioning clamping groove matched with the formwork; the upper surface of the bottom plate is provided with a formwork reference surface distributed around the shell; the formwork datum plane is flush with the top surface of the keel.
4. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 3, wherein: the truss connecting piece comprises at least one pair of connecting screw rods, a supporting bottom sleeve, two side sleeves, a lower supporting plate and two side sleeves, wherein the upper position of the supporting bottom sleeve is adjustable, the supporting bottom sleeve is arranged on the connecting screw rods, the two side sleeves are arranged on the pair of connecting screw rods and supported by the supporting bottom sleeve, the two side sleeves are arranged on the pair of connecting screw rods and press the upper pressing plate of the upper longitudinal rib, and the nuts of the upper pressing plate are locked on the connecting screw rods.
5. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 4, wherein: the step S1) includes the steps of:
s11) mounting the connecting screw and the lower supporting plate on the metal keel;
s12) placing the metal keels provided with the connecting screw rods and the lower supporting plates in parallel according to the rib spacing;
s13) laying a formwork between two adjacent metal keels, wherein two sides of the formwork are erected on the formwork supporting surface of the metal keels, and the formwork clamping strips at the two sides are clamped in the formwork positioning clamping grooves; the connecting screw rods are positioned at the longitudinal and transverse intersection positions in the rib beam grooves;
s14) placing lower longitudinal ribs parallel to the metal keels on the lower supporting plate;
s15) placing truss units vertical to the metal keels on the lower longitudinal ribs of the lower supporting plate;
s16) placing upper longitudinal bars perpendicular to the truss units on the truss units;
s17) installing an upper pressure plate on the connecting screw rod, locking the upper pressure plate by using a nut, and further locking a steel bar grid structure consisting of the lower longitudinal bar, the truss unit and the upper longitudinal bar on the metal keel to form the ribbed floor slab template.
6. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 1, wherein: the truss unit is of a plane truss structure or a three-dimensional truss structure and comprises an upper main rib, a lower main rib and a connecting rib for connecting the upper main rib and the lower main rib; the truss unit is located between the lower longitudinal rib and the upper longitudinal rib.
7. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 5, wherein: a plurality of bolt holes are formed in the top surface of the keel, and the bolt holes penetrate through the upper surface and the lower surface of the metal keel;
and the step S11) comprises the steps of penetrating the connecting screw rods into the bolt holes from the lower part of the metal keel, then screwing the support bottom sleeve into the top surface of the metal keel, tightly attaching the support bottom sleeve to the top surface of the metal keel, then sleeving the two sides of the lower supporting plate on the connecting screw rods, and moving the lower supporting plate downwards to be placed on the support bottom sleeve.
8. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 5, wherein: a first limiting groove and a second limiting groove perpendicular to the first limiting groove are formed in the lower supporting plate, a first plane structure is arranged on two sides of the first limiting groove, and a through hole is formed in the first plane structure and used for penetrating through the connecting screw rod; the lower longitudinal ribs are placed in first limiting grooves of the lower supporting plate, and the lower main ribs in the truss units are placed in second limiting grooves of the lower supporting plate.
9. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 5, wherein: a third limiting groove and a fourth limiting groove perpendicular to the third limiting groove are formed in the upper pressing plate, a second plane structure is arranged on two sides of the third limiting groove, and a through hole is formed in the second plane structure and used for penetrating through the connecting screw rod; the third limiting groove in the upper pressing plate is clamped on the upper longitudinal rib, and the fourth limiting groove is clamped on the upper main rib of the truss unit.
10. The construction process of the light preset fabricated space grid multi-ribbed floor slab as claimed in claim 5, wherein: the ribbed floor slab comprises a floor structure and a rib beam structure positioned on the lower surface of the floor structure, wherein the rib beam structure is of a criss-cross structure, and a plurality of formwork evacuation cavities are formed after the formworks are disassembled.
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| CN113622572A (en) * | 2021-08-19 | 2021-11-09 | 广东省第四建筑工程有限公司 | Hollow floor slab filling box fixing construction method |
| CN113846789A (en) * | 2021-11-01 | 2021-12-28 | 河北科技师范学院 | Assembled concrete bidirectional ribbed floor structure and construction method thereof |
| CN117846283A (en) * | 2024-03-04 | 2024-04-09 | 山东鼎泰建设项目管理有限公司 | Widening shuttering device |
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| CN112982777B (en) | 2023-04-11 |
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