CN112144724A - Close hollow superimposed sheet of piecing together - Google Patents
Close hollow superimposed sheet of piecing together Download PDFInfo
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- CN112144724A CN112144724A CN202011037025.0A CN202011037025A CN112144724A CN 112144724 A CN112144724 A CN 112144724A CN 202011037025 A CN202011037025 A CN 202011037025A CN 112144724 A CN112144724 A CN 112144724A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 100
- 239000010959 steel Substances 0.000 claims abstract description 100
- 239000002131 composite material Substances 0.000 claims abstract description 32
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- 238000009415 formwork Methods 0.000 description 1
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- 239000008239 natural water Substances 0.000 description 1
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Classifications
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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
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/7608—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising a prefabricated insulating layer, disposed between two other layers or panels
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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
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
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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
- E04B5/18—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly cast between filling members
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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
- E04B2005/176—Floor structures partly formed in situ with peripheral anchors or supports
Abstract
The invention discloses a close-spliced hollow composite slab, which comprises a bottom plate with transverse rib beams and vertical rib beam truss reinforcing steel bars, wherein the transverse rib beams are arranged along the length direction of the bottom plate, the vertical rib beam truss reinforcing steel bars are arranged along the width direction of the bottom plate, a light filling body is arranged between the adjacent transverse rib beams on the bottom plate, the light filling body, the bottom plate and the transverse rib beams are combined into a prefabricated bottom plate structure, a plurality of prefabricated bottom plates are spliced along the width direction of the prefabricated bottom plates, the vertical rib beams and a top plate along the width direction of the bottom plate are poured after the prefabricated bottom plates are spliced in place to form a close-ribbed cavity floor slab, and the corresponding position of the light filling body is the hollow part of the composite slab. The invention combines the advantages of the cast-in-place hollow floor slab and the truss steel bar composite slab, and integrates the light filling body, the composite bottom plate and the transverse dense ribs in the cavity into a whole to form the bottom plate with the unidirectional dense ribs and the light filling body, thereby being capable of meeting the bearing capacity and rigidity required by the construction of the floor slab with larger span without additional support of facilities or support reduction.
Description
Technical Field
The invention belongs to the technical field of laminated slabs, and particularly relates to 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: to the problem that above-mentioned exists, provide a bearing capacity and rigidity that can satisfy great span floor construction needs, and do not need the close hollow superimposed sheet of piecing together that other facilities worker supported or reduced the support.
The technical scheme of the invention is realized as follows: the utility model provides a close hollow superimposed sheet of piecing together which characterized in that: including the bottom plate that has horizontal rib roof beam and vertical rib roof beam truss reinforcing bar, horizontal rib roof beam sets up along bottom plate length direction, vertical rib roof truss reinforcing bar sets up along bottom plate width direction, be provided with the light obturator on the bottom plate between the adjacent horizontal rib roof beam, light obturator, bottom plate and horizontal rib roof beam synthesize become integrative prefabricated bottom plate structure, and a plurality of prefabricated bottom plates splice along its width direction, and the concatenation is taken one's place the back and is pour vertical rib roof and the roof along bottom plate width direction, forms dense rib cavity floor, the light obturator corresponds the hollow part that the department is the superimposed sheet.
According to the close-spliced hollow composite slab, adjacent prefabricated bottom plate structures are connected with each other through the spliced joint, the spliced joint comprises a slab bottom longitudinal rib bending section and a joint surface connecting rib, the slab bottom longitudinal rib bending section is a part of a bottom plate inner slab bottom longitudinal rib extending out of a bottom plate and bending upwards, the joint surface connecting rib is arranged in a splicing area, and two ends of the joint surface connecting rib respectively extend to splicing ends of the corresponding prefabricated bottom plate structures.
When the adjacent prefabricated bottom plate structures are spliced, namely the plates are spliced, truss reinforcing steel bars are prefabricated at the splicing ends of the bottom plates, the bottoms of the truss reinforcing steel bars are embedded in the bottom plates, the rest parts of the truss reinforcing steel bars are exposed in a splicing area, plate bottom longitudinal bar bending sections on the adjacent bottom plates are positioned between the truss reinforcing steel bars on the adjacent bottom plates, the joint surface connecting bars are integrally U-shaped, and the vertical bending parts at the two ends of the joint surface connecting bars are close to the side ends of the corresponding transverse rib beams.
The close-spliced hollow composite slab is characterized in that when a prefabricated bottom plate structure and a frame beam are spliced, namely the splicing between the plate and the beam, the prefabricated bottom plate structure is respectively arranged at two sides of the frame beam, a plate bottom longitudinal rib bending section on a bottom plate is positioned between a transverse rib beam and the frame beam, junction surface connecting ribs are mutually connected to form a closed annular connecting rib, the junction surface connecting rib penetrates through the frame beam, and two ends of the junction surface connecting rib are respectively connected with the splicing ends of the prefabricated bottom plate structure at two sides of the frame beam.
According to the close-spliced hollow composite slab, a plurality of transverse through long structural ribs are arranged at the bottom in the splicing area, and a plurality of slab top longitudinal ribs are arranged above the prefabricated bottom plate structure.
According to the close-spliced hollow composite slab, the transverse rib beam through-length reinforcing steel bars which are transversely arranged along the transverse rib beam are arranged at the upper part of the transverse rib beam, the transverse through-length reinforcing steel bars are arranged at intervals at the upper parts of hollow positions between adjacent transverse rib beams, the vertical rib beam through-length reinforcing steel bars which are vertically arranged along the vertical rib beam are arranged at the upper parts of hollow positions between adjacent vertical rib beams, and the vertical through-length reinforcing steel bars are arranged at intervals at the upper parts of hollow positions between adjacent vertical rib beams.
According to the close-spliced hollow composite slab, transverse additional steel bars are arranged between the transverse rib beam through long steel bars and the transverse through long steel bars and between the adjacent transverse through long steel bars, and vertical additional steel bars are arranged between the vertical rib beam through long steel bars and the vertical through long steel bars and between the adjacent vertical through long steel bars.
According to the close-spliced hollow composite slab, the corresponding position of the prefabricated bottom plate structure and the frame column is a solid area, 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.
According to the close-spliced hollow composite slab, the end part of the transverse rib beam close to the frame beam is embedded with the additional reinforcing steel bar at the end part of the rib beam.
The shear steel bars are embedded in the transverse rib beam, the lower parts of the shear steel bars are connected with the bottom longitudinal bars, the upper parts of the shear steel bars are connected with the top longitudinal bars, the shear steel bars adopt 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 on the tops of the transverse rib 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, and is produced in a large scale in a factory to form the bottom plate with the unidirectional dense ribs and the light filling body, thereby meeting the bearing capacity and rigidity required by the construction of the large-span floor slab without additional support of facilities or support reduction.
The close-spliced hollow composite slab has the advantages of high assembly degree, less field wet operation and the like of a 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 is produced in a factory, the rigidity is high, the transportation and the hoisting are convenient, and the support 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 disclosed by the invention combines the characteristics of a cast-in-place hollow slab and a truss steel bar composite slab, has the advantages of safety, economy, energy conservation, environmental protection, convenience in 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 close-spliced hollow composite slab comprises a bottom plate 1 with a transverse rib beam 2 and a vertical rib beam truss steel bar, wherein the transverse rib beam 2 is arranged along the length direction of the bottom plate 1, the vertical rib beam truss steel bar is arranged along the width direction of the bottom plate, a light filling body 3 is arranged between the adjacent transverse rib beams 2 on the bottom plate 1, the vertical rib beam truss steel bar is arranged between the adjacent light filling bodies, the light filling body 3, the bottom plate 1 and the transverse rib beam 2 are synthesized into a prefabricated bottom plate structure, large-scale production in a factory is realized, a plurality of prefabricated bottom plates are spliced along the width direction of the prefabricated bottom plates, a vertical rib beam 4 and a top plate 5 along the width direction of the bottom plate 1 are poured after splicing in place, a dense rib cavity floor slab with good integrity is formed, and the light filling body 3 is correspondingly positioned at the hollow part of the. The close-spliced hollow composite slab can realize bidirectional force transmission, effectively coordinates the deformation of vertical components, meets the assumption of rigid floor slabs, has no ribs on the periphery, is convenient to construct, has high rigidity of the bottom plate, and can realize less support or no support.
Specifically, through piece joint connected node interconnect between the adjacent prefabricated bottom plate structure, piece joint connected node includes that the muscle bending segment 7 is indulged at the bottom of the board and faying face splice bar 8, the muscle bending segment 7 is indulged at the bottom of 1 inner panel of bottom plate and is indulged muscle 10 and stretch out bottom plate 1 and the part of upwards buckling at the bottom of the board, faying face splice bar 8 arranges splicing region 9 in, and both ends extend to the splicing end that corresponds prefabricated bottom plate structure respectively. The bottom plate adopts a close splicing mode, a series of problems caused by steel bars are avoided, the splicing seams are connected in a steel bar overlapping mode, the holding capacity of concrete can be fully exerted under the action of the truss steel bars, effective overlapping is realized, meanwhile, the steel bars are bent, the overlapping length is reduced, no template is realized, and the site construction is facilitated.
The calculation and 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-. 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.
As shown in fig. 2, when the adjacent prefabricated bottom plate structures are spliced, that is, the plates are spliced, truss steel bars 6 are prefabricated at the splicing ends of the bottom plates 1, the bottoms of the truss steel bars 6 are embedded in the bottom plates 1, the rest parts of the truss steel bars are exposed in a splicing area 9, the plate bottom longitudinal bar bending sections 7 on the adjacent bottom plates 1 are located between the truss steel bars 6 on the adjacent bottom plates 1, the joint surface connecting bars 8 are integrally U-shaped and perpendicular to the splice joints, according to the tensile lap joint design, the vertical bending parts at the two ends of the joint surface connecting bars 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 steel bars are hooked at. 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, when the prefabricated bottom plate structure is spliced with the frame beam 11, that is, the prefabricated bottom plate structure is spliced with the frame beam 11, the prefabricated bottom plate structure is respectively disposed at both sides of the frame beam 11, the plate bottom longitudinal rib bending section 7 on the bottom plate 1 is located between the transverse rib beam 2 and 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 both ends of the joint surface connecting rib are respectively connected with the spliced ends of the prefabricated bottom plate structure at both sides of the frame beam 11.
A plurality of transverse through-length construction ribs 12 perpendicular to joint ribs of a joint surface are arranged at the bottom in the splicing area 9, the number of the transverse through-length construction ribs is not less than 3 in a lapping range, the distance is not more than 250mm, a plurality of plate top longitudinal ribs 13 are arranged above the prefabricated bottom plate structure, a top plate is made of common steel bars, and the common steel bars are relatively and intensively arranged in the effective flange width range of the rib beam; the minimum reinforcement ratio needs to meet As/A0/. gtoreq.p.min I/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.
As shown in fig. 6 and 7, a transverse rib beam through-length steel bar 14 arranged transversely along the transverse rib beam is arranged on the upper portion of the transverse rib beam 2, the diameter of the transverse rib beam is not less than 10, transverse through-length steel bars 15 are arranged at intervals on the upper portion of a hollow position between adjacent transverse rib beams 2, a vertical rib beam through-length steel bar 16 arranged vertically along the vertical rib beam is arranged on the upper portion of the vertical rib beam 4, vertical through-length steel bars 17 are arranged at intervals on the upper portion of a hollow position between adjacent vertical rib beams 4, transverse additional steel bars 18 are arranged between the transverse rib beam through-length steel bar 14 and the transverse through-length steel bar 15 and between adjacent transverse through-length steel bars 15, and vertical additional steel bars 19 are arranged between the vertical rib beam through-length steel bar 16 and the vertical through-length steel bar 17 and between adjacent.
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 arranged at the position corresponding to the frame column 20, 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 at the periphery of the hollow laminated plate positioned around the frame column, the top and the bottom of the hollow laminated plate in the area are provided with construction steel bars in a bidirectional mode, the diameter of the plate is not less than 8, and the distance of the plate 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 prestressed tendons are intensively arranged at the rib beam, as shown in fig. 11, rib beam end additional steel bars 22 are embedded at the end part of the transverse rib beam 2 close to the frame beam 11.
As shown in fig. 8, in order to improve the shear strength of the prefabricated base plate, shear steel bars are embedded in the transverse rib beam 2, the lower portions of the shear steel bars are connected with the plate bottom longitudinal bars 10, the upper portions of the shear steel bars are connected with the plate top longitudinal bars 13, and the shear steel bars are steel bar trusses 23.
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. The utility model provides a close hollow superimposed sheet of piecing together which characterized in that: including bottom plate (1) that has horizontal rib beam (2) and vertical rib beam truss reinforcing bar, bottom plate (1) length direction setting is followed in horizontal rib beam (2), vertical rib beam truss reinforcing bar sets up along bottom plate (1) width direction, be provided with light obturator (3) on bottom plate (1) between adjacent horizontal rib beam (2), light obturator (3), bottom plate (1) and horizontal rib beam (2) are synthesized and are become integrative prefabricated bottom plate structure, and a plurality of prefabricated bottom plates splice along its width direction, pour vertical rib beam (4) and roof (5) along bottom plate (1) width direction after the concatenation is taken one's place, form close rib cavity floor, light obturator (3) correspond the hollow part that the department is the superimposed sheet.
2. A close-coupled hollow composite slab as claimed in claim 1, wherein: through piece connected node interconnect between adjacent prefabricated bottom plate structure, piece connected node includes that the muscle bending segment (7) and faying face splice bar (8) are indulged at the bottom of the board, indulge muscle bending segment (7) and stretch out bottom plate (1) and the part of upwards buckling for bottom plate (1) inner panel end longitudinal bar (10) at the bottom of the board, in splicing region (9) are arranged in faying face splice bar (8), and both ends extend to the splicing end that corresponds prefabricated bottom plate structure respectively.
3. A close-coupled hollow composite slab as claimed in claim 2, wherein: when splicing between the adjacent prefabricated bottom plate structures, namely splicing between plates, truss reinforcing steel bars (6) are prefabricated at the splicing ends of the bottom plates (1), the bottoms of the truss reinforcing steel bars (6) are embedded in the bottom plates (1), the rest parts of the truss reinforcing steel bars are exposed in a splicing area (9), the plate bottom longitudinal bar bending sections (7) on the adjacent bottom plates (1) are located between the truss reinforcing steel bars (6) on the adjacent bottom plates (1), the joint surface connecting bars (8) are integrally U-shaped, and the vertical bending parts at the two ends of the joint surface connecting bars are close to the side ends of the corresponding transverse rib beams (2).
4. A close-coupled hollow composite slab as claimed in claim 2, wherein: when splicing between the prefabricated bottom plate structure and the frame beam (11), namely splicing between the plate and the beam, the prefabricated bottom plate structure is arranged on two sides of the frame beam (11) respectively, the plate bottom longitudinal rib bending section (7) on the bottom plate (1) is positioned between the transverse rib beam (2) and the frame beam (11), the joint surface connecting ribs (8) are connected with each other to form a closed annular connecting rib, and the joint surface connecting ribs (8) penetrate through the frame beam (11) and are connected with the splicing ends of the prefabricated bottom plate structure on two sides of the frame beam (11) respectively at two ends.
5. A close-coupled hollow composite slab according to claim 3 or 4, wherein: a plurality of transverse through-length construction ribs (12) are arranged at the bottom in the splicing area (9), and a plurality of plate top longitudinal ribs (13) are arranged above the prefabricated bottom plate structure.
6. The close-fit hollow composite slab according to claim 5, wherein: the transverse rib beam (2) is provided with transverse rib beam through-length steel bars (14) transversely arranged along the transverse rib beam, transverse through-length steel bars (15) are arranged at intervals on the upper portion of a hollow position between every two adjacent transverse rib beams (2), vertical rib beam through-length steel bars (16) vertically arranged along the vertical rib beams are arranged on the upper portion of the vertical rib beams (4), and vertical through-length steel bars (17) are arranged at intervals on the upper portion of a hollow position between every two adjacent vertical rib beams (4).
7. The close-fit hollow composite slab according to claim 6, wherein: transverse additional steel bars (18) are arranged between the transverse rib beam through long steel bars (14) and the transverse through long steel bars (15) and between the adjacent transverse through long steel bars (15), and vertical additional steel bars (19) are arranged between the vertical rib beam through long steel bars (16) and the vertical through long steel bars (17) and between the adjacent vertical through long steel bars (17).
8. The close-fit hollow composite slab according to claim 5, wherein: the prefabricated bottom plate structure is a solid area (21) at the position corresponding to the frame column (20), and the width d from the supporting edge to the corresponding hollow area is not less than 0.2 times of the plate thickness and is not less than 50 mm.
9. The close-fit hollow composite slab according to claim 5, wherein: and additional steel bars (22) at the end parts of the rib beams (2) close to the frame beam (11) are embedded in the end parts of the rib beams.
10. The close-fit hollow composite slab according to claim 5, wherein: shear steel bars are pre-buried in the transverse rib beam (2), the lower portions of the shear steel bars are connected with the plate bottom longitudinal bars (10), the upper portions of the shear steel bars are connected with the plate top longitudinal bars (13), the shear steel bars are steel bar trusses (23), or steel bar meshes (24), or single-pull steel bars (25), and transverse bars (26) which are perpendicular to the single-pull steel bars (25) are arranged on the top portions, close to the transverse rib beam (2).
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| CN202011037025.0A CN112144724A (en) | 2020-09-28 | 2020-09-28 | Close hollow superimposed sheet of piecing together |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027026A (en) * | 2021-04-02 | 2021-06-25 | 青岛腾远设计事务所有限公司 | Inverted U-shaped prestress laminated floor slab and installation method thereof |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027026A (en) * | 2021-04-02 | 2021-06-25 | 青岛腾远设计事务所有限公司 | Inverted U-shaped prestress laminated floor slab and installation method thereof |
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