CN112982775A - Light prefabricated assembly type space net rack ribbed floor slab template and construction process - Google Patents

Abstract

The invention discloses a light preset fabricated space net rack ribbed floor formwork and a construction process, which comprises a plurality of metal keels arranged in parallel at intervals, a plurality of formworks with two sides erected on two adjacent metal keels, a same row of formworks 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 distributed perpendicular to the metal keels are arranged in the rib beam grooves in the same row, lower longitudinal ribs and upper longitudinal ribs distributed 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 form a steel bar net rack integrally and are detachably locked on the metal keels through the truss connecting pieces. The invention greatly reduces the investment of a large amount of square timber and template materials, has simple assembly, quick assembly and less labor, reduces the comprehensive cost of the assembled floor slab, improves the construction efficiency and conforms to the green energy-saving building.

Description

Light prefabricated assembly type space net rack ribbed floor slab template and construction process

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of floor slab formwork, and particularly relates to a light prefabricated assembly type space net rack ribbed floor slab formwork and a construction process.

[ background of the invention ]

The ribbed floor, hollow floor and cast-in-place beam slab floor in the existing market are that a main keel is erected on a support frame, a required square timber secondary keel is erected on the main keel according to the space size of the floor, a template is laid on the square timber, then an axis and a rib beam size line are manually placed on the template, a filling box or a disposable formwork is placed on the template according to a construction drawing, the biggest defect is that the filling box or the disposable formwork is permanently pre-embedded and cannot be reused, the corresponding cost is increased, or the reusable formwork is placed on the site for overhead operation and paying off after the traditional square timber and template erection is completed, then the formwork is placed at the corresponding floor position for use, the using amount of the square timber secondary keel is not reduced, the using amount of the template is not reduced or limited, the workload of overhead rib beam line is increased, the case or the formwork is easily displaced due to the manual placing of the filling box or the formwork without accurate positioning, therefore, the derived problems that the rib beams are not on the same line or the rib beams are not uniform in width are generated, the operation safety risk is increased due to the inconvenience, the assembly type industrial policy is not met, and meanwhile, the corresponding quality safety hidden trouble is increased due to the fact that the rib width is not uniform due to the displacement of the formwork.

Therefore, there is a need to provide a new light prefabricated assembly type space grid multi-ribbed floor slab template and a construction process to solve the above technical problems.

[ summary of the invention ]

One of the main purposes of the invention is to provide a light prefabricated assembly type space net rack ribbed floor slab template, which reduces the investment and waste of square timber secondary keels, templates, filling boxes or disposable formworks, improves the dimensional precision of the width of a rib beam, improves the construction efficiency of formwork support and formwork laying, and meets the requirements of green energy-saving buildings.

The invention realizes the purpose through the following technical scheme: the utility model provides a light-duty prefabricated assembled space rack close rib floor formwork, its includes that a plurality of metal joists, both sides that parallel interval set up adjacent two a plurality of formworks on the metal joists, adjacent two same row of formworks zero clearance between the metal joists sets up in turn, all the formwork with around forming vertically and horizontally staggered's rib beam groove between the metal joists, same line be provided with in the rib beam groove with metal joists vertical distribution's truss unit, same row be provided with in the rib beam groove with metal joists parallel distribution's lower vertical bar and last vertical bar, the last locking of metal joists has truss connection spare, truss unit down vertical bar with go up vertical bar whole constitution reinforcing bar and pass through truss connection spare detachable locks on the metal joists.

Further, the metal keel is of an aluminum alloy section structure, and the formwork is of an aluminum alloy shell structure or a plastic shell structure.

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.

Furthermore, 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 bulged 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 position matched with the formwork positioning clamping grooves.

Further, a formwork reference surface distributed around the shell is formed on the upper surface of the bottom plate; the formwork datum plane is flush with the top surface of the keel.

Furthermore, a through-long weight-reducing pumping cavity is arranged inside the metal keel.

Further, the truss unit is of a plane truss structure or a three-dimensional truss structure and comprises an upper main rib and a lower main rib; the truss unit is located between the lower longitudinal rib and the upper longitudinal rib.

Furthermore, the truss connecting piece is arranged on the metal keel and is positioned at the position where the rib beam grooves are intersected vertically and horizontally.

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;

the truss connecting piece comprises at least one pair of connecting screw rods penetrating through the bolt holes, a supporting bottom sleeve, a lower supporting plate, two side sleeves and a nut, wherein the upper supporting plate is arranged on the connecting screw rods in an adjustable mode, 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 nut is used for locking the upper pressing plate on the connecting.

The invention also aims to provide a construction process of the ribbed floor slab template, which comprises the following steps:

1) a connecting screw and a lower supporting plate are arranged on the metal keel;

2) placing the metal keels provided with the connecting screw rods and the lower supporting plate in parallel according to a set interval;

3) a formwork is fully arranged between two adjacent metal keels, two sides of the formwork are erected on the supporting surfaces of the formwork and the formwork clamping strips on the two sides are clamped in the positioning clamping grooves of the formwork; the formworks in the same row are arranged in a gapless manner, and the formworks in the same row are correspondingly aligned; the shuttering and the metal keel surround to form criss-cross rib beam grooves, and the connecting screw rods are positioned at the criss-cross junctions in the rib beam grooves;

4) a lower longitudinal rib parallel to the metal keel is arranged on the lower supporting plate;

5) truss units vertical to the metal keels are placed on the upper longitudinal ribs and the lower longitudinal ribs of the lower supporting plate;

6) upper longitudinal bars vertical to the truss units are arranged on the truss units;

7) and an upper pressure plate is arranged on the connecting screw rod and locked by a nut, and then a reinforcing steel bar grid structure consisting of a lower longitudinal bar, a truss unit and an upper longitudinal bar is locked on the metal keel to form the ribbed floor slab template.

Compared with the prior art, the light prefabricated assembly type space net rack ribbed floor slab template and the construction process have the beneficial effects that: the method comprises the following steps of rapidly assembling and combining a turnover formwork made of aluminum alloy or plastic cement with high self-weight and high strength and a metal keel with a clamping groove on site to form a formwork-supporting-free, pay-off-free and positioning-free formwork ribbed floor formwork, then manufacturing criss-cross rib beam reinforcing steel bars and plate distribution reinforcing steel bars, and then pouring concrete to form a ribbed floor; the construction process greatly reduces the investment of a large number of square timbers and template materials, is simple to assemble, quick in template assembly, small in labor amount, low in loss, free of construction waste due to complete material circulation, greatly reduces the comprehensive manufacturing cost of the fabricated floor slab, improves the size precision of the width of the rib beam, is quick to assemble on a flat site, improves the construction efficiency of formwork supporting and formwork laying, is flexible, convenient and safe for personnel operation, and accords with green energy-saving buildings.

[ description of the drawings ]

FIG. 1 is a schematic partial structure diagram according to an embodiment of the present 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 truss units, the lower longitudinal ribs and the upper longitudinal ribs in the embodiment of the present invention;

FIG. 9 is a schematic view of another connection structure of the truss connection member with the truss units, the lower longitudinal ribs and the upper longitudinal ribs according to the embodiment of the present invention;

FIG. 10 is a schematic diagram of a partially enlarged structure according to an embodiment of the present invention;

FIG. 11 is a schematic overall structure diagram of an embodiment of the present invention;

the figures in the drawings represent:

1 metal keel, 11T-shaped bolt grooves, 12 keel top surfaces, 121 bolt holes, 13 formwork supporting surfaces, 131 formwork positioning lines, 14 formwork positioning clamping grooves and 15 weight-reducing drawing cavities.

2, a formwork, a bottom plate 21, a formwork datum plane 211, a second weight-reducing groove 212, a shell 22, a cavity 221, an air hole 222, a slope structure 223, a reinforcing rib 224, a formwork clamping bar 23 and a first weight-reducing groove 231;

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 piece, 71 connecting screw, 711 lower section, 712 upper section, 72 support bottom sleeve, 73 bottom supporting plate, 731 first limiting groove, 732 second limiting groove, 733 first plane structure, 74 upper press plate, 741 third limiting groove, 742 fourth limiting groove, 743 second plane structure and 75 nuts.

[ detailed description ] embodiments

Example (b):

referring to fig. 1 to 11, the light prefabricated assembly type spatial grid frame ribbed floor slab formwork 100 of the present embodiment includes a plurality of metal joists 1 arranged in parallel at intervals, a plurality of formworks 2 arranged on two adjacent metal joists 1 at two sides, a same row of formworks 2 between two adjacent metal joists 1 are arranged in a gap-free manner, criss-cross rib grooves 3 are formed between all the formworks 2 and the metal joists 1 around the formworks, truss units 4 vertically distributed with the metal joists 1 are arranged in the same row of rib grooves 3, lower longitudinal ribs 5 and upper longitudinal ribs 6 distributed in parallel with the metal joists 1 are arranged in the same row of rib grooves 3, truss connectors 7 are locked on the metal joists 1, and the truss units 4, the lower longitudinal ribs 5 and the upper longitudinal ribs 6 are integrally and detachably locked on the metal joists 1 through the truss connectors 7.

The metal keel 1 is an aluminum alloy section structure. The bottom of the metal keel 1 is of a plane structure and is provided with at least two through long T-shaped bolt grooves 11, the top of the metal keel 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 height difference with the keel top surface 12, and formwork positioning clamping grooves 14 which are arranged between the keel top surface 12 and the formwork shell supporting surfaces 13 and are formed by downward sinking. The T-bolt slot 11 can be used for pre-setting the bolt head for connection with other structural members. Three T-bolt slots 11 are provided in this embodiment.

The inside of metal joist 1 is provided with through long subtracts heavy cavitys 15, helps alleviateing the holistic weight of fossil fragments, is convenient for transportation and transport. The bottom of the metal keel 1 is arranged to be a plane structure, and horizontal positioning is facilitated.

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.

In order to improve the assembling efficiency and convenience of the formwork shell, a plurality of formwork positioning lines 131 are arranged on the formwork shell supporting surface 13 in the embodiment. 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 location lines 131 can be flexibly set according to the width of the formwork and the formwork.

The height difference between the keel top surface 12 and the formwork and formwork support surface 13 is consistent with the thickness of the corresponding parts of the edge formwork 3 and the formwork 2, so that the surfaces of the edge formwork 3 and the formwork 2 are flush to form a horizontal reference surface after being assembled on the metal keel 1.

The whole mould shell 2 is of 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 assembling the formwork 2, the two sides of the formwork 2 are erected on the formwork supporting surface 13, the formwork clamping strips 23 on the two sides of the formwork 2 are clamped into the formwork positioning clamping grooves 14 to form a whole with the metal keels 1 on the two sides, one end of each formwork clamping strip is placed against the formwork positioning line 131, two adjacent formworks 2 are arranged in a gapless manner, the two adjacent formworks 2 are tiled to fill the space between the two adjacent metal keels 1, wherein the two sides of the formwork reference surface 211 of the formwork 2 can be spliced with the keel top surface 12 in a seamless manner to form a horizontal reference surface. In order to enable the shuttering clamping strip 23 on the shuttering 2 to be clamped into the shuttering positioning clamping groove 14 quickly.

The thickness of bottom plate 21 is 5 ~ 50mm, and the difference in height between template mould shell holding surface 13 and the fossil fragments top surface 12 in the metal joist 1 corresponds equally to make its mould shell reference surface 211 and fossil fragments top surface 12 surface parallel and level after mould shell 2 sets up on metal joist 1.

The height of the formwork clamping strip 23 protruding downwards to the formwork bottom supporting surface 212 is 5-50 mm, the width of the formwork clamping strip 23 is matched with the formwork positioning clamping groove 14, and the width of the formwork clamping strip is 5-50 mm.

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.

In order to reduce the overall weight of the formwork 2, the formwork clamping bar 23 is provided with a first weight-reducing groove 231. The first weight-reducing groove 231 may be an internal through groove structure of the formwork fastening strip 23, or a groove structure formed by upward sinking from the lower surface of the formwork fastening strip 23. The bottom plate 21 is provided with a plurality of second lightening slots 212. The second lightening grooves 212 may be through groove structures formed in the bottom plate 21, or may be groove structures formed by being recessed upward from the lower surface of the bottom plate 21.

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.

A plurality of bolt holes 121 for fixing the truss connecting pieces 7 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 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 truss connecting piece 7 comprises at least one pair of connecting screw rods 71 penetrating through the metal keel 1, a supporting bottom sleeve 72 arranged on the connecting screw rods 71 in an adjustable up-down position, a lower supporting plate 73, two sides of which are sleeved on the pair of connecting screw rods 71 and supported by the supporting bottom sleeve 72, an upper pressing plate 74, two sides of which are sleeved on the pair of connecting screw rods 71 and pressing the upper longitudinal ribs 6, and a nut 75 for locking the upper pressing plate 74 on the connecting screw rods 71.

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.

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 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 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. 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 construction process of the light prefabricated assembly type space net rack ribbed floor slab template comprises the following construction steps:

1) the metal keel 1 is provided with a connecting screw rod 71 and a lower supporting plate 73: a connecting screw rod 71 penetrates through a bolt hole 121 from the lower part of the metal keel 1, then a supporting bottom sleeve 72 is screwed into the keel top surface 12 tightly attached to the metal keel 1, and then two sides of a lower supporting plate 73 are sleeved on the connecting screw rod 71 and move downwards to be placed on the supporting bottom sleeve 72;

2) placing the metal keels 1 provided with the connecting screw rods 71 and the lower supporting plates 73 in parallel according to a set interval;

3) a formwork 2 is fully arranged between two adjacent metal keels 1, two sides of the formwork 2 are erected on a formwork supporting surface 13, and formwork clamping strips 23 at 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 a 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; at the moment, the shuttering 2 and the metal keel 1 surround to form criss-cross rib beam grooves 3, and the connecting screw rods 71 are positioned at the criss-cross junctions in the rib beam grooves 3;

4) a lower longitudinal rib 5 parallel to the metal keel 1 is arranged on the lower supporting plate 73; the lower longitudinal rib 5 is placed in the first limiting groove 731 of the lower supporting plate 73;

5) a truss unit 4 vertical to the metal keel 1 is arranged on the upper surfaces of the upper and lower longitudinal ribs 5 of the lower supporting plate 73; the lower main rib in the truss unit 4 is placed in the second limit groove 732 of the lower supporting plate 73;

6) an upper longitudinal bar 6 vertical to the truss unit 4 is arranged on the truss unit 4;

7) an upper pressing plate 74 is installed on the connecting screw 7, a third limiting groove 741 in the upper pressing plate 74 is clamped on the upper longitudinal rib 6, a fourth limiting groove 742 is clamped on the upper main rib of the truss unit 4, then the upper pressing plate 74 is locked by a nut 75, and therefore a steel bar grid structure composed of the lower longitudinal rib 5, the truss unit 4 and the upper longitudinal rib 6 is locked on the metal keel 1 to form a ribbed floor slab formwork to be hoisted to the main keel, and the next step of working procedures are carried out.

The light prefabricated assembly type space net rack ribbed floor slab template and the construction process have the advantages of light dead weight, high bearing capacity, multiple repeated times, quick and simple assembly, accurate positioning, no loss, flat land operation, high safety, capability of forming a combined space net rack by rib beam steel bars and the template and the like, save a large amount of labor and material investment, reduce the comprehensive cost of the assembly type floor slab, and accord with green energy-saving buildings.

The light prefabricated assembly type space net rack ribbed floor formwork and the construction process 100 are characterized in that a reusable formwork, a metal keel with a clamping groove, a connecting piece, a truss (a plane truss/a three-dimensional truss), a lower longitudinal rib and an upper longitudinal rib which are made of aluminum alloy or plastic materials with self weight, light weight and high strength are adopted to be quickly assembled and combined on the flat ground on site to form the space net rack ribbed floor formwork which is free of formwork support, free of paying off, accurate in positioning and high in strength, and then the space net rack ribbed floor formwork is hoisted to a corresponding floor position according to needs. This scheme light-duty assembled space net rack template compares with other packing box or mould shell templates, has following characteristics:

1) the mould shell adopts an aluminum alloy or plastic structure and can be repeatedly used;

2) the formwork and the keel are combined to form a rapid formwork supporting and paying-off free formwork supporting technical scheme;

3) the formwork is provided with the clamping strips, the width of each clamping strip is matched with the keel clamping groove, the formwork can be quickly and accurately installed, and construction quality hidden danger caused by displacement of the formwork is avoided;

4) the height from the basic surface to the supporting surface of the formwork is equal to the thickness of the formwork and the height from the top surface of the keel to the supporting surface of the keel, the top surface of the keel, the basic surface of the formwork and the upper surface of the formwork after assembly and combination are in the same plane on the size design of the corresponding component, and the error is controlled within 5 mm;

5) the keel and the formwork on the same side are arranged closely, so that square timber components are not required to be added, the construction difficulty is reduced, and the construction efficiency is improved;

6) the keel is made of metal, so that the durability and the turnover frequency of the keel are improved, and the bearing capacity of the keel is improved;

7) the keel supporting surface and the top surface are designed with a height difference, so that the formwork or the template can be conveniently and quickly placed without adjusting the height, and the upper surface of the keel supporting surface are on the same plane;

8) the keel is provided with a positioning clamping groove, so that the formwork can be quickly fastened conveniently, the positioning of the formwork is ensured, and the rib spacing is also ensured;

9) the rapid combination of the keel and the formwork is completed at one time, a series of complex work such as formwork erecting, paying off, formwork placing and the like is avoided, the construction efficiency is improved, and the construction quality is improved;

10) the keel formwork combination can turn over the formwork, so that the use amount of square wood keels and wood formworks is greatly reduced, and the wood investment and construction loss are reduced to the maximum extent;

11) fixing the steel bars or part of the steel bars of the rib beam and the metal keel together through a truss connecting piece to form a bidirectional stressed space net rack;

12) all the template components can be assembled on a leveling field at one time, so that high-altitude operation is avoided, the construction efficiency is high, the safety is high, and the construction period can be greatly shortened;

13) the rib beam steel bars (trusses/longitudinal bars) are assembled into the template in advance, so that the workload of the rib beam steel bars at the later stage is reduced;

14) the truss unit has higher stability, and the overall performance of the floor slab is improved;

15) truss connection spare belongs to disposable component, has buried the close rib floor after the shaping, and the screw of connecting piece screw rod can be fine be used for the later stage to walk the connecting hole of pipe or furred ceiling, reduces the damage that later stage drilling hole caused the floor.

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 light-duty prefabricated assembled space rack close rib floor template which characterized in that: it includes that a plurality of metal joists, both sides that parallel interval set up adjacent two a plurality of formworks on the metal joists, adjacent two same row of formworks zero clearance between the metal joists sets up in turn, all the formwork with around forming vertically and horizontally staggered's rib groove between the metal joists, with going on be provided with in the rib groove with metal joists vertical distribution's truss unit, same row be provided with in the rib groove with metal joists parallel distribution's lower indulges muscle and last indulge the muscle, the last locking of metal joists has truss connection spare, the truss unit indulge the muscle down with on indulge the muscle wholly constitute the reinforcing bar rack and pass through truss connection spare detachable locks on the metal joists.

2. The light-weight pre-fabricated space grid multi-ribbed floor slab as recited in claim 1, wherein: the metal keel is of an aluminum alloy section structure, and the formwork is of an aluminum alloy shell structure or a plastic shell structure.

3. The light-weight pre-fabricated space grid multi-ribbed floor slab as recited 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.

4. A light-weight pre-fabricated space grid multi-ribbed floor slab as recited in claim 3, 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 internally hollow, and the formwork clamping strips are downwards extended from two sides of the bottom plate to form a position matched with the formwork positioning clamping grooves.

5. The light-weight pre-fabricated space grid multi-ribbed floor slab as recited in claim 4, wherein: 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.

6. The light-weight pre-fabricated space grid multi-ribbed floor slab as recited in claim 1, wherein: and a through-long weight-reducing pumping cavity is arranged in the metal keel.

7. The light-weight pre-fabricated space grid multi-ribbed floor slab as recited 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 and a lower main rib; the truss unit is located between the lower longitudinal rib and the upper longitudinal rib.

8. The light-weight pre-fabricated space grid multi-ribbed floor slab as recited in claim 1, wherein: the truss connecting piece is arranged on the metal keel and is positioned at the position where the rib beam grooves are intersected vertically and horizontally.

9. A light-weight pre-fabricated space grid multi-ribbed floor slab as recited in claim 3, 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;

the truss connecting piece comprises at least one pair of connecting screw rods penetrating through the bolt holes, a supporting bottom sleeve, a lower supporting plate, two side sleeves and a nut, wherein the upper supporting plate is arranged on the connecting screw rods in an adjustable mode, 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 nut is used for locking the upper pressing plate on the connecting.

10. A process of constructing a ribbed floor formwork as claimed in any one of claims 1 to 9, wherein: which comprises the following steps:

1) a connecting screw and a lower supporting plate are arranged on the metal keel;

2) placing the metal keels provided with the connecting screw rods and the lower supporting plate in parallel according to a set interval;

3) a formwork is fully arranged between two adjacent metal keels, two sides of the formwork are erected on the supporting surfaces of the formwork and the formwork clamping strips on the two sides are clamped in the positioning clamping grooves of the formwork; the formworks in the same row are arranged in a gapless manner, and the formworks in the same row are correspondingly aligned; the shuttering and the metal keel surround to form criss-cross rib beam grooves, and the connecting screw rods are positioned at the criss-cross junctions in the rib beam grooves;

4) a lower longitudinal rib parallel to the metal keel is arranged on the lower supporting plate;

5) truss units vertical to the metal keels are placed on the upper longitudinal ribs and the lower longitudinal ribs of the lower supporting plate;

6) upper longitudinal bars vertical to the truss units are arranged on the truss units;

7) and an upper pressure plate is arranged on the connecting screw rod and locked by a nut, and then a reinforcing steel bar grid structure consisting of a lower longitudinal bar, a truss unit and an upper longitudinal bar is locked on the metal keel to form the ribbed floor slab template.

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