CN112177219A - Manufacturing method of close-spliced hollow laminated slab - Google Patents
Manufacturing method of close-spliced hollow laminated slab Download PDFInfo
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- CN112177219A CN112177219A CN202011036726.2A CN202011036726A CN112177219A CN 112177219 A CN112177219 A CN 112177219A CN 202011036726 A CN202011036726 A CN 202011036726A CN 112177219 A CN112177219 A CN 112177219A
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- 239000002131 composite material Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 35
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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
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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
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/88—Insulating elements for both heat and sound
- E04B1/90—Insulating elements for both heat and sound slab-shaped
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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
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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
- E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
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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
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/02—Material constitution of slabs, sheets or the like of ceramics, concrete or other stone-like material
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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
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/06—Material constitution of slabs, sheets or the like of metal
Abstract
The invention discloses a method for manufacturing a close-spliced hollow laminated slab, which comprises the following specific manufacturing steps: s1, manufacturing a prefabricated bottom plate structure; s2, splicing a plurality of prefabricated bottom plate structures; and S3, forming a template structure of on-site concrete pouring by the frame beams around the prefabricated bottom plate structure after splicing, pouring concrete into the formed mold cavity, completing on-site pouring of the splicing part of the adjacent prefabricated bottom plate structures, the prefabricated vertical rib beam truss steel bar part and the top plate part, and finally forming the close-spliced hollow laminated slab. The hollow composite slab manufactured by the invention combines the advantages of a cast-in-place hollow floor slab and a truss steel bar composite slab, integrates the light filler, the composite bottom plate and the transverse dense ribs in the cavity, is produced in a large scale in a factory to form the bottom plate with the unidirectional dense ribs, the embedded steel bars and the light filler, can meet the bearing capacity and rigidity required by the construction of a large-span floor slab, does not need additional support or reduced support, and finally pours the longitudinal rib beam and the top plate on site, thereby completing the manufacturing of the close-spliced hollow composite slab.
Description
Technical Field
The invention belongs to the technical field of laminated slabs, and particularly relates to a manufacturing method of a close-spliced hollow laminated slab.
Background
Compared with the traditional integral cast-in-place floor slab, the truss reinforced concrete composite slab avoids construction procedures such as formwork erecting and lower reinforcement binding on a construction site, saves building materials, shortens the construction period, is green and environment-friendly, and meets the national development requirement on building industrialization; however, the truss steel bar laminated slab is suitable for medium and small span floor systems, a certain support needs to be arranged, construction cost is increased, a post-cast strip needs to be supported, steel bars are discharged from a bottom plate, and the construction difficulty is increased. In the full cast-in-situ large-span floor, the hollow floor slab forms a cavity by utilizing the light filling body to reduce the weight, has high bearing capacity and saves materials, is widely applied to public buildings, but has larger difficulty in site construction.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the manufacturing method of the close-spliced hollow composite slab can meet the bearing capacity and rigidity required by large-span floor slab construction, and does not need additional support of facilities or support reduction.
The technical scheme of the invention is realized as follows: a manufacturing method of a close-spliced hollow laminated slab is characterized by comprising the following steps: the specific manufacturing steps are as follows:
s1, manufacturing a prefabricated bottom plate structure, specifically, prefabricating a transverse rib beam on a bottom plate along the length direction of the bottom plate and prefabricating a vertical rib beam truss steel bar along the width direction of the bottom plate, arranging a light filling body on the bottom plate part enclosed by the prefabricated transverse rib beam and the vertical rib beam truss steel bar, wherein the corresponding part of the light filling body is a hollow part formed by cast-in-place composite slabs, prefabricating the truss steel bar at the splicing end of the bottom plate, pre-burying the bottom of the truss steel bar in the bottom plate, and exposing the rest of the truss steel bar in a splicing area;
s2, splicing a plurality of prefabricated bottom plate structures, specifically splicing the prefabricated bottom plate structures along the width direction of the prefabricated bottom plate structures on a construction site, wherein adjacent prefabricated bottom plate structures and the prefabricated bottom plate structures and corresponding frame beams are connected with each other through splicing joint connecting nodes respectively;
and S3, forming a template structure of on-site concrete pouring by the frame beams around the prefabricated bottom plate structure after splicing, pouring concrete into the formed mold cavity, completing on-site pouring of the splicing part of the adjacent prefabricated bottom plate structures, the prefabricated vertical rib beam truss steel bar part and the top plate part, and finally forming the close-spliced hollow laminated slab.
In the step S1, when prefabricating the transverse rib beam on the bottom plate, the shear-resistant steel bars are embedded in the transverse rib beam, the lower portions of the shear-resistant steel bars are connected with the bottom longitudinal bars in the bottom plate, and the upper portions of the shear-resistant steel bars are connected with the top longitudinal bars in the top plate;
the shear steel bars are steel bar trusses or steel bar meshes or single-pull steel bars, and transverse bars which are perpendicular to the single-pull steel bars are arranged at the tops of the transverse rib beams.
In the step S2, joint surface connecting ribs are manufactured and placed in the joint area between adjacent prefabricated bottom plate structures, both ends of the joint surface connecting ribs extend to the joint ends of the corresponding prefabricated bottom plate structures respectively, the bottom longitudinal ribs of the bottom plate inner plate extend out of the bottom plate and are bent upwards to form plate bottom longitudinal rib bending sections, and the joint surface connecting ribs and the plate bottom longitudinal rib bending sections form joint seam connecting nodes.
In the step S2, the closely-spliced hollow composite slab is obtained by splicing the adjacent prefabricated bottom plate structures, that is, splicing the plates, after splicing, bending sections of the longitudinal ribs at the bottoms of the adjacent bottom plates are positioned between the truss reinforcing steel bars on the adjacent bottom plates, and the joint surface connecting rib is manufactured into a U-shaped structure as a whole, and the vertical bending parts at the two ends of the joint surface connecting rib are close to the side ends of the corresponding transverse rib beams.
In the step S2, the prefabricated floor structure and the frame beam are spliced, that is, the prefabricated floor structure is respectively installed on both sides of the frame beam, the bent sections of the bottom longitudinal ribs on the floor are located on both sides of the frame beam, the joint surface connecting ribs are connected with each other to form closed ring-shaped connecting ribs, the joint surface connecting ribs penetrate through the frame beam, and both ends of the joint surface connecting ribs are respectively connected with the splicing ends of the prefabricated floor structures on both sides of the frame beam.
In the step S2, after the assembly of the abutted seam connection node is completed, a plurality of transverse through-length structural ribs are arranged at the bottom in the splicing region of the adjacent prefabricated bottom plate structures, and a plurality of plate top longitudinal ribs are arranged above the prefabricated bottom plate structures.
In the step S3, before cast-in-place, the method arranges the transverse gird through-length steel bars on the upper portions of the transverse girds, arranges the transverse through-length steel bars at intervals on the upper portions of the hollow positions between the adjacent transverse girds, arranges the vertical gird through-length steel bars on the upper portions of the vertical girds, and arranges the vertical through-length steel bars at intervals on the upper portions of the hollow positions between the adjacent vertical girds.
The invention relates to a method for manufacturing a close-spliced hollow laminated slab, which arranges transverse additional reinforcing steel bars between a transverse rib beam through-length reinforcing steel bar and a transverse through-length reinforcing steel bar and between adjacent transverse through-length reinforcing steel bars, and arranges vertical additional reinforcing steel bars between a vertical rib beam through-length reinforcing steel bar and a vertical through-length reinforcing steel bar and between adjacent vertical through-length reinforcing steel bars.
According to the manufacturing method of the close-spliced hollow composite slab, the solid area is cast at the position where the prefabricated bottom plate structure corresponds to the frame column, and the width d from the supporting edge to the corresponding hollow area is not less than 0.2 times of the thickness of the slab and is not less than 50 mm.
The invention relates to a manufacturing method of a close-spliced hollow composite slab, which is characterized in that reinforcing steel bars are additionally embedded at the end parts of transverse rib beams close to frame beams.
The invention combines the advantages of the cast-in-place hollow floor slab and the truss steel bar composite slab, integrates the light filling body, the composite bottom plate and the transverse dense ribs in the cavity, produces the bottom plate with the unidirectional dense ribs, the embedded steel bars and the light filling body in a factory in a large scale, can meet the bearing capacity and rigidity required by the construction of a large-span floor slab, does not need additional support or reduced support, and finally pours the longitudinal rib beam and the top plate on site, thereby completing the manufacture of the dense splicing hollow composite slab.
The close-spliced hollow composite slab manufactured by the invention has the advantages of high assembly degree, less field wet operation and the like of the common truss steel bar composite slab, and has the following characteristics:
1) the bearing capacity is high, can eliminate the secondary beam, improves indoor net height, avoids the connection of primary and secondary beams, raises the efficiency.
2) The bottom plate with the transverse ribs and the longitudinal truss steel bars is produced in a factory, the rigidity is high, transportation and hoisting are facilitated, and supports can be cancelled or reduced on site.
3) The floor slabs are spliced closely, the cast-in-place layer at the splicing position is thick, the integrity is good, and the floor slabs have good horizontal rigidity and horizontal force transfer capability.
4) The light filling body at the cavity is made of materials such as a filling box or light filling materials, so that the weight is reduced, and the light filling body has the functions of heat preservation, heat insulation and sound insulation.
In conclusion, the concrete hollow composite slab manufactured by the invention combines the characteristics of the cast-in-place hollow slab and the truss steel bar composite slab, has the advantages of safety, economy, energy conservation, environmental protection, convenient construction and the like, and can be widely applied to engineering practice.
Drawings
FIG. 1 is a schematic view of a prefabricated floor structure of the present invention.
Fig. 2 is a schematic illustration of the splicing of adjacent prefabricated floor structures according to the present invention.
Fig. 3 is a schematic illustration of the splicing of a prefabricated floor structure to a frame beam according to the present invention.
Fig. 4 is a top view of the prefabricated floor structure of the present invention after splicing.
Fig. 5 is a partially enlarged view of the junction of the prefabricated floor structure and the frame post according to the present invention.
Fig. 6 is a schematic view of the transverse arrangement of reinforcing bars in the present invention.
Fig. 7 is a schematic view of the present invention with vertically arranged reinforcing bars.
Fig. 8 is a schematic structural view of shear reinforcing bars pre-embedded in a transverse rib of the present invention.
Fig. 9 is another structural view of shear reinforcing bars pre-embedded in the transverse rib of the present invention.
Fig. 10 is another structural view of shear reinforcing bars pre-embedded in the transverse rib of the present invention.
Fig. 11 is a schematic structural view of a connecting portion of a rib beam and a frame beam in the present invention.
The labels in the figure are: the steel plate is characterized in that the steel plate is a bottom plate 1, a transverse rib beam 2, a light filling body 3, a vertical rib beam 4, a top plate 5, a truss steel bar 6, a plate bottom longitudinal bar bending section 7, a joint surface connecting bar 8, a splicing area 9, a plate bottom longitudinal bar 10, a frame beam 11, a transverse through-length structural bar 12, a plate top longitudinal bar 13, a transverse rib beam through-length steel bar 14, a transverse through-length steel bar 15, a vertical rib beam through-length steel bar 16, a vertical through-length steel bar 17, a transverse additional steel bar 18, a vertical additional steel bar 19, a frame column 20, a solid area 21, a rib beam end additional steel bar 22, a steel bar truss 23, a steel bar net piece 24, a single-pulling steel bar 25 and a transverse bar 26.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description of the present invention with reference to the accompanying drawings and embodiments will be made in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1, a method for manufacturing a close-spliced hollow laminated slab comprises the following specific steps:
s1, manufacturing a prefabricated bottom plate structure, specifically, prefabricating a transverse rib beam 2 and a vertical rib beam truss steel bar along the length direction of the transverse rib beam on a bottom plate 1, wherein a light filling body 3 is arranged on the bottom plate part enclosed by the prefabricated transverse rib beam 2 and the vertical rib beam truss steel bar, the light filling body 3 is a hollow part formed by cast-in-place composite slabs, the truss steel bar 6 is prefabricated at the splicing end of the bottom plate 1, the bottom of the truss steel bar 6 is embedded in the bottom plate 1, and the rest of the truss steel bar is exposed in a splicing area 9.
When prefabricating the transverse rib beam 2 on the bottom plate 1, shear steel bars are pre-embedded in the transverse rib beam 2, the lower parts of the shear steel bars are connected with the bottom longitudinal bars 10 in the bottom plate 1, and the upper parts of the shear steel bars are connected with the top longitudinal bars 13 in the top plate 5, wherein in the embodiment, the shear steel bars adopt steel bar trusses 23.
According to the invention, the prefabricated bottom plate structure is manufactured, the bottom plates are densely spliced, a series of problems caused by steel bars are avoided, the splicing seams are connected in a steel bar lap joint mode, the holding capacity of concrete can be fully exerted under the action of truss steel bars, effective lap joint is realized, meanwhile, the steel bars are bent, the lap joint length is reduced, no template is realized, the field construction is facilitated, the rigidity of the bottom plates is high, and less support or no support can be realized.
S2, splicing a plurality of prefabricated bottom plate structures, specifically splicing the prefabricated bottom plate structures along the width direction of the prefabricated bottom plate structures on a construction site, wherein adjacent prefabricated bottom plate structures and the prefabricated bottom plate structures and corresponding frame beams are connected with each other through splicing joint connecting nodes respectively.
Specifically, the joint surface connecting ribs 8 are manufactured and arranged in a splicing area 9 between adjacent prefabricated bottom plate structures, two ends of each joint surface connecting rib 8 extend to splicing ends corresponding to the prefabricated bottom plate structures respectively, the bottom longitudinal ribs 10 of the inner plate of the bottom plate 1 extend out of the bottom plate 1 and are bent upwards to form bottom longitudinal rib bending sections 7, and the joint surface connecting ribs 8 and the bottom longitudinal rib bending sections 7 form splicing joint nodes.
As shown in fig. 2, the adjacent prefabricated bottom plate structures are spliced, namely, the plates are spliced, after splicing, the plate bottom longitudinal rib bending sections 7 on the adjacent bottom plates 1 are positioned between the truss reinforcing steel bars 6 on the adjacent bottom plates 1, the joint surface connecting ribs 8 are integrally made into a U-shaped structure and are arranged perpendicular to the splicing seams, according to the tension lap joint design, the vertical bending parts at the two ends of the joint surface connecting ribs are close to the side ends of the corresponding transverse rib beams 2, the diameter of the vertical bending parts is not less than 8mm and not more than 14mm, and the additional reinforcing steel bars are hooked by 90 degrees. The plate plates of the invention adopt close splicing seams, the splicing area lapped steel bars are bent upwards, the truss steel bars strengthen the bond stress of concrete, and the effective force transmission of the bottom plate steel bars and the seam lapped steel bars is realized.
As shown in fig. 3, the prefabricated bottom plate structure is spliced with the frame beam 11, that is, the prefabricated bottom plate structure is spliced between the plate and the beam, the prefabricated bottom plate structure is respectively installed on two sides of the frame beam 11, the plate bottom longitudinal rib bending section 7 on the bottom plate 1 is located on two side surfaces of the frame beam 11, the joint surface connecting ribs 8 are connected with each other to form a closed ring-shaped connecting rib, the joint surface connecting rib 8 penetrates through the frame beam 11, and two ends of the joint surface connecting rib are respectively connected with the splicing ends of the prefabricated bottom plate structure on two sides of the frame beam 11.
After assembling of the splicing joint connecting nodes is completed, a plurality of transverse through-length construction ribs 12 are arranged at the bottom in the splicing area 9 of the adjacent prefabricated bottom plate structures, the number of the transverse through-length construction ribs is not less than 3 in the overlapping range, the distance is not more than 250mm, a plurality of plate top longitudinal ribs 13 are arranged above the prefabricated bottom plate structures, the top plates are made of common steel bars, and the common steel bars are arranged in the effective flange width range of the rib beam in a relatively concentrated mode; the minimum reinforcement ratio needs to meet As/A0/. gtoreq.p.minI/I0. The configuration of the additional reinforcing steel bars meets the following requirements: the bending resistance bearing capacity of the B-B section (the abutted seam position) is not smaller than that of the A-A section (the non-abutted seam position), and the height of the section is the height of the section of the cast-in-place layer when the bearing capacity of the B-B section is calculated.
And S3, forming a template structure for on-site concrete pouring by using frame beams around the prefabricated bottom plate structure after splicing, and as shown in FIGS. 6 and 7, before on-site pouring, arranging transverse rib beam through-length reinforcing steel bars 14 on the upper parts of the transverse rib beams 2, arranging transverse through-length reinforcing steel bars 15 at intervals on the upper parts of hollow positions between the adjacent transverse rib beams 2, arranging vertical rib beam through-length reinforcing steel bars 16 on the upper parts of the vertical rib beams 4, arranging vertical through-length reinforcing steel bars 17 at intervals on the upper parts of hollow positions between the adjacent vertical rib beams 4, arranging transverse additional reinforcing steel bars 18 between the transverse rib beam through-length reinforcing steel bars 14 and the transverse through-length reinforcing steel bars 15 and between the adjacent transverse through-length reinforcing steel bars 15, and arranging vertical additional reinforcing steel bars 19 between the vertical rib beam through-length reinforcing steel bars 16 and the vertical through-length reinforcing steel bars.
And finally, pouring concrete into the formed mold cavity to finish the on-site pouring of the splicing part of the adjacent prefabricated bottom plate structures, the reinforcing steel bar part of the prefabricated vertical rib beam truss and the top plate part, and finally forming the close-spliced hollow composite slab.
As shown in FIGS. 4 and 5, the floor slab with 8mx8m span is divided into three plates, the width of each plate is 2000-2550, the length of each diaphragm box is 800-1100, the width of each diaphragm box is 500-800, the width of each rib is 100-200, the close-splicing connection width is 650, the single side is 325, the lap joint requirement is met, the thickness of the bottom plate is 50-60, and the thickness of the cast-in-place layer is 60-70. The prefabricated bottom plate structure is characterized in that a solid area 21 is poured at the position corresponding to a frame column, the solid area meets the requirement of the shearing bearing capacity, the width d from a supporting edge to the corresponding hollow area is not less than 0.2 times of the plate thickness and not less than 50mm, the solid area with the side length of not less than 500mm is arranged on the periphery of the hollow composite slab positioned around the frame column, the top and the bottom of the hollow composite slab in the area are provided with construction steel bars in a bidirectional mode, the diameter of the steel bars is not less than 8, and the distance of the steel bars is not more than 200 mm.
Specifically, the direction of the steel bars in the bottom plate parallel to the rib beam is preferably a prestressed steel bar and common steel bar mixed reinforcement mode, or only common steel bars can be adopted, the direction of the bottom plate vertical to the rib beam is preferably common steel bars, the prestressed steel bars of the bottom plate are preferably a linear pretensioning method tensioning process by adopting a long line method, and when the pretensioning method process is adopted, additional transverse steel bars are arranged along the member within a certain range at the end part of the member, and the number of the additional transverse steel bars is not less than 3; when the tendons are intensively arranged at the rib, as shown in fig. 11, the rib end portion additional reinforcing bars 22 are embedded at the end portions of the transverse ribs 2 close to the frame beam 11.
The calculation analysis of the hollow composite slab can adopt a plate simulating method or a beam simulating method according to the technical specification of cast-in-place concrete hollow floor (JGJ/T268-2012). When the beam-like method is used for calculation, the beam stiffness needs to take the orthogonal anisotropy of the plate into consideration. For the close-spliced hollow composite slab, except the same as a cast-in-place hollow slab, the rigidity difference exists in two directions of the slab due to the arrangement mode of the light filling bodies, and the rigidity in the direction perpendicular to the splicing seam can be weakened and the rigidity difference in the two directions of the hollow slab can be further increased due to the close-spliced connection between the bottom plates. Through research and analysis, the load guiding mode of the close-spliced hollow composite slab and the cast-in-place hollow floor slab can be considered to be the same.
In this embodiment, the light filler is a light material such as foamed concrete and cellular concrete, and its physical and mechanical properties should meet the following requirements: apparent density (kg/m 3): 15.0-500.0, local compressive strength (kN) after soaking for 48 hours: not less than 1.0, natural water absorption (%): less than or equal to 5, and vibration impact resistance: phi 30, the vibrating rod is tightly attached to the surface and vibrates for 1min, through cracks and damages do not occur, and the vibrating rod and the bottom plate are manufactured together in a factory, so that the problem of difficulty in fixing the diaphragm capsule on site is solved.
Example 2:
this example is substantially the same as example 1, with the main differences: as shown in fig. 9, the shear reinforcement is a mesh 24 of reinforcing bars.
Example 3:
this example is substantially the same as example 1, with the main differences: as shown in fig. 10, the shear reinforcement is a single-strand reinforcement 25 and a transverse bar 26, which is perpendicular to the single-strand reinforcement 25 and has a diameter of not less than 10, is provided near the top of the transverse rib 2.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A manufacturing method of a close-spliced hollow laminated slab is characterized by comprising the following steps: the specific manufacturing steps are as follows:
s1, manufacturing a prefabricated bottom plate structure, specifically, prefabricating a transverse rib beam on a bottom plate along the length direction of the bottom plate and prefabricating a vertical rib beam truss steel bar along the width direction of the bottom plate, arranging a light filling body on the bottom plate part enclosed by the prefabricated transverse rib beam and the vertical rib beam truss steel bar, wherein the corresponding part of the light filling body is a hollow part formed by cast-in-place composite slabs, prefabricating the truss steel bar at the splicing end of the bottom plate, pre-burying the bottom of the truss steel bar in the bottom plate, and exposing the rest of the truss steel bar in a splicing area;
s2, splicing a plurality of prefabricated bottom plate structures, specifically splicing the prefabricated bottom plate structures along the width direction of the prefabricated bottom plate structures on a construction site, wherein adjacent prefabricated bottom plate structures and the prefabricated bottom plate structures and corresponding frame beams are connected with each other through splicing joint connecting nodes respectively;
and S3, forming a template structure of on-site concrete pouring by the frame beams around the prefabricated bottom plate structure after splicing, pouring concrete into the formed mold cavity, completing on-site pouring of the splicing part of the adjacent prefabricated bottom plate structures, the prefabricated vertical rib beam truss steel bar part and the top plate part, and finally forming the close-spliced hollow laminated slab.
2. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 1, wherein: in step S1, when prefabricating the transverse rib beam on the bottom plate, pre-burying shear steel bars in the transverse rib beam, connecting the lower portions of the shear steel bars with the bottom longitudinal bars in the bottom plate, and connecting the upper portions of the shear steel bars with the top longitudinal bars in the top plate;
the shear steel bars are steel bar trusses or steel bar meshes or single-pull steel bars, and transverse bars which are perpendicular to the single-pull steel bars are arranged at the tops of the transverse rib beams.
3. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 1, wherein: in the step S2, joint surface connecting ribs are manufactured and placed in the splicing regions between adjacent prefabricated bottom plate structures, two ends of each joint surface connecting rib extend to the splicing ends of the corresponding prefabricated bottom plate structures, the bottom longitudinal ribs of the bottom plate inner plate extend out of the bottom plate and are bent upwards to form plate bottom longitudinal rib bending sections, and the joint surface connecting ribs and the plate bottom longitudinal rib bending sections form splicing joint connection nodes.
4. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 3, wherein: in the step S2, the adjacent prefabricated bottom plate structures are spliced, that is, the plates are spliced, after splicing, the bent sections of the longitudinal ribs at the bottoms of the adjacent bottom plates are located between the truss reinforcing steel bars on the adjacent bottom plates, the joint surface connecting ribs are made into a U-shaped structure as a whole, and the vertical bent parts at the two ends of the joint surface connecting ribs are close to the side ends of the corresponding transverse rib beams.
5. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 3, wherein: in step S2, the prefabricated floor structure and the frame beam are spliced, that is, the slab and the beam are spliced, the prefabricated floor structure is respectively installed on both sides of the frame beam, the slab bottom longitudinal rib bending sections on the floor are located on both sides of the frame beam, the joint surface connecting ribs are connected to each other to form a closed ring-shaped connecting rib, the joint surface connecting rib penetrates through the frame beam, and both ends of the joint surface connecting rib are respectively connected to the splicing ends of the prefabricated floor structure on both sides of the frame beam.
6. The method for manufacturing a close-coupled hollow composite slab as claimed in claim 4 or 5, wherein: in the step S2, after the assembly of the patchwork connection node is completed, a plurality of transverse through-length structural ribs are arranged at the bottom in the splicing area of the adjacent prefabricated bottom plate structures, and a plurality of plate top longitudinal ribs are arranged above the prefabricated bottom plate structures.
7. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 6, wherein: in step S3, before cast-in-place, the transverse gird full-length steel bars are arranged on the upper portions of the transverse girds, the transverse full-length steel bars are arranged at intervals on the upper portions of the hollow positions between adjacent transverse girds, the vertical gird full-length steel bars are arranged on the upper portions of the vertical girds, and the vertical full-length steel bars are arranged at intervals on the upper portions of the hollow positions between adjacent vertical girds.
8. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 7, wherein: transverse additional reinforcing steel bars are arranged between the transverse rib beam through-length reinforcing steel bars and the transverse through-length reinforcing steel bars and between the adjacent transverse through-length reinforcing steel bars, and vertical additional reinforcing steel bars are arranged between the vertical rib beam through-length reinforcing steel bars and the vertical through-length reinforcing steel bars and between the adjacent vertical through-length reinforcing steel bars.
9. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 6, wherein: and pouring solid areas at the corresponding positions of the prefabricated bottom plate structures and the frame columns, wherein the width d from the supporting edges to the corresponding hollow areas is not less than 0.2 times of the plate thickness and is not less than 50 mm.
10. The method for manufacturing the close-coupled hollow composite slab as claimed in claim 6, wherein: and (4) embedding reinforcing steel bars at the end parts of the transverse rib beams close to the frame beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036726.2A CN112177219A (en) | 2020-09-28 | 2020-09-28 | Manufacturing method of close-spliced hollow laminated slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036726.2A CN112177219A (en) | 2020-09-28 | 2020-09-28 | Manufacturing method of close-spliced hollow laminated slab |
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| Publication Number | Publication Date |
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| CN112177219A true CN112177219A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011036726.2A Withdrawn CN112177219A (en) | 2020-09-28 | 2020-09-28 | Manufacturing method of close-spliced hollow laminated slab |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960968A (en) * | 2022-05-30 | 2022-08-30 | 南京旭浦建材科技有限公司 | Concrete superimposed sheet and cast-in-place roof beam connection structure |
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|---|---|---|---|---|
| EP0014294A1 (en) * | 1979-01-05 | 1980-08-20 | RHINOLITH Société anonyme | Insulating precast building element |
| CN109025017A (en) * | 2018-08-17 | 2018-12-18 | 大连三川建设集团股份有限公司 | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction |
| CN208396111U (en) * | 2018-07-11 | 2019-01-18 | 湖北宇辉中工建筑产业化有限公司 | The hollow laminated floor slab of large span with truss bars |
| CN111705987A (en) * | 2020-06-23 | 2020-09-25 | 建研科技股份有限公司 | Large-span prefabricated ribbed prestressed hollow bidirectional laminated slab |
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2020
- 2020-09-28 CN CN202011036726.2A patent/CN112177219A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0014294A1 (en) * | 1979-01-05 | 1980-08-20 | RHINOLITH Société anonyme | Insulating precast building element |
| CN208396111U (en) * | 2018-07-11 | 2019-01-18 | 湖北宇辉中工建筑产业化有限公司 | The hollow laminated floor slab of large span with truss bars |
| CN109025017A (en) * | 2018-08-17 | 2018-12-18 | 大连三川建设集团股份有限公司 | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction |
| CN111705987A (en) * | 2020-06-23 | 2020-09-25 | 建研科技股份有限公司 | Large-span prefabricated ribbed prestressed hollow bidirectional laminated slab |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114960968A (en) * | 2022-05-30 | 2022-08-30 | 南京旭浦建材科技有限公司 | Concrete superimposed sheet and cast-in-place roof beam connection structure |
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Application publication date: 20210105 |