CN107254930B - Broad-width hollow superimposed sheet - Google Patents
Broad-width hollow superimposed sheet Download PDFInfo
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- CN107254930B CN107254930B CN201710658141.6A CN201710658141A CN107254930B CN 107254930 B CN107254930 B CN 107254930B CN 201710658141 A CN201710658141 A CN 201710658141A CN 107254930 B CN107254930 B CN 107254930B
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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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Abstract
The invention relates to a wide hollow laminated slab and a manufacturing method thereof, belonging to the field of general building construction. The laminated slab comprises prefabricated parts (1) and a laminated layer (2), wherein the thickness of a bottom plate (3) of each prefabricated part is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars (4) are arranged in the bottom plate in a bidirectional mode, the length of the bottom plate steel bars extending out of concrete is more than or equal to 50mm, filling pieces (5) of light materials which are more than or equal to 3 rows, 5 columns or more than 5 columns are arranged on the upper portion of each prefabricated part, the height of solid ribs (6) between adjacent filling pieces is more than or equal to 50mm, the bottom plate steel bars between adjacent prefabricated parts are mutually overlapped in a joint area (7), upper steel bars (9) of the laminated slab are bound, and concrete is poured to form the laminated slab. The laminated slab has the advantages of light self weight, large rigidity in the longitudinal and transverse directions, large applicable span and convenience in transportation and installation. The invention has good economy and applicability, and plays a role in promoting the development of building technology.
Description
Field of the art
The invention relates to an assembled reinforced concrete hollow floor structure, in particular to a wide hollow laminated slab and a manufacturing method thereof, and belongs to the field of general building construction.
(II) background art
The assembled building has the characteristics of high industrial production degree, high construction speed and low comprehensive cost, and the structural form is currently being promoted widely by China.
For the assembled floor system with the span below 5m, the common superimposed sheet can be solved; however, when the span is more than 5m, especially when the span exceeds 7m, if a common solid floor is adopted, the self weight of the structure is large, the earthquake resistance is poor, and the comprehensive economic index is low. For the floor structure, no matter cast-in-place or superposed, the hollowing is a technical means for solving the problem of large span.
Before 2004, the maximum span of the traditional laminated floor system is not more than 6m, and Xu Youlin, wang Xiaofeng and the like propose a prestress bidirectional laminated floor system (CN 2642887Y), which has the main technical scheme that: 1. prefabricating the bottom of the building cover, and casting the upper part of the building cover in situ, wherein a plurality of prestress prefabricating bottom plates are adopted in one direction of the building cover for parallel splicing; 2. the prefabricated bottom plate is transversely spliced by adopting an integral type splice joint, the thickness of the side edges is properly reduced, the steel bars extending out of the plate sides are overlapped and bent at the splice joint and then extend into the opposite side cast-in-situ concrete layer to be anchored, and 2 steel bars are arranged at the bending positions of the steel bars of the splice joint to strengthen the anchoring; 3. adopting a middle-high strength spiral rib steel wire or three strands of steel strands as a prestress reinforcement; 4. light non-bearing materials can be placed in the post-cast concrete laminated layer to enhance the service performance of the floor slab such as heat preservation, sound insulation and the like. The technical proposal of CN2642887Y can reach 9-10m of engineering implementation span, thereby greatly promoting the development of superimposed sheet technology.
CN2642887Y, however, suffers from the following drawbacks: 1. because CN2642887Y uses high-strength spiral rib steel wires or three steel strands with relatively large diameters, the thickness of the prefabricated bottom plate is generally more than or equal to 60mm, the self weight of the prefabricated bottom plate is large, the construction is difficult, and the maximum use span of the floor slab is limited; 2. when the thickness of the prefabricated bottom plate is less than or equal to 80mm, the rigidity of the prefabricated bottom plate is small, and the hoisting construction difficulty is high; 3. because the dead weight of the prefabricated bottom plates is large and is limited by the hoisting weight of construction machinery, when the span of the floor slab is more than or equal to 9m, the width of each prefabricated bottom plate is generally less than or equal to 1.2m, the same plate is formed by splicing a plurality of prefabricated bottom plates, and the splicing seam is more than the splicing seam area, so that the consumption of reinforcing steel bars is more, and the construction workload is more. In CN2642887Y, it has also been proposed to "place light non-load bearing materials" in floors, but it is limited to placing in post-cast concrete stacks, which is not practical for reducing the dead weight of prefabricated floors.
In 2004, gao Lianyu proposed a "prestressed concrete composite slab" (CN 2706530), whose structure is: the section of the prestressed reinforced concrete slab (1) is one or a plurality of inverted T-shaped sections which are connected together, the section of the prestressed reinforced concrete slab (1) can also be one or a plurality of concave sections which are connected together, a filler or a baffle plate (3) is arranged in a groove (2) of the prestressed reinforced concrete slab (1), a cast concrete laminated layer (4) is arranged above the filler or the baffle plate (3), and an anchor lacing wire (6) which extends out of the rib (5) is arranged on the upper part of the rib (5) of the prestressed reinforced concrete slab. The main drawbacks of CN2706530 are: the connecting performance between different prefabricated parts is poor, only is applicable to the one-way board, and the rigidity of perpendicular to prefabricated part length direction is little, and construction hoist and mount are difficult.
After 2012, wu Shungong et al propose a "cellular-type rib-frame prestressed reinforced concrete composite slab" (CN 102995805A) and a "box-type prestressed concrete light composite slab" (CN 203603332U), which have the following drawbacks: 1. the prefabricated member has small hollow rate and large self-weight; 2. the connection performance between adjacent prefabricated members is poor, and the method is only suitable for unidirectional plates.
In 2015, wang Donghui et al proposed "prestressed concrete ribbed composite" (CN 204609075U), and the main technical scheme thereof is: the superimposed sheet includes prefabricated bottom plate and concrete layer, and the prefabricated bottom plate comprises bottom plate and floor, and the floor includes L shape and T shape two kinds, is filled with polystyrene foam heated board between the floor, is provided with concrete layer on the prefabricated bottom plate. The defects are that: the connection performance between adjacent prefabricated members is poor, and the method is only suitable for unidirectional plates.
In summary, the following defects exist in the prior art of the assembled laminated floor system, and mainly include: 1. the dead weight of the prefabricated part is large; 2. the rigidity of the prefabricated part is low; 3. the width of the prefabricated part is small; 4. the connection performance between adjacent prefabricated members is poor, and the two-way plate is not suitable for the two-way plate; 5. the application span is small. Under such circumstances, development of a superimposed sheet technique that overcomes the above-mentioned drawbacks has become an urgent problem to be solved in the current fabricated superimposed floor systems.
(III) summary of the invention
In the existing fabricated laminated floor system technology, the problems that the dead weight of prefabricated components is large, the rigidity of the prefabricated components is small, the applicable span is small, the connection performance between adjacent prefabricated components is poor, the two-way plates are not applicable, the width of the prefabricated components is narrow and the like exist.
On the basis of the prior art, in order to achieve the above purpose, the invention adopts the following technical scheme: the wide hollow laminated slab is a reinforced concrete structure and comprises prefabricated parts at the bottom and a laminated layer at the upper part, wherein each prefabricated part is in a strip shape, the width of each prefabricated part is more than or equal to 2000mm and less than or equal to 3500mm, the length of each prefabricated part is more than or equal to 5000mm and less than or equal to 10000mm, the thickness of bottom plate concrete of each prefabricated part is more than or equal to 40mm and less than or equal to 65mm, bottom plate reinforcing steel bars are arranged in the bottom plate in a bidirectional mode, the length of the bottom plate reinforcing steel bars extending out of the concrete of the bottom plate is more than or equal to 50mm, filling pieces of light materials with the thickness of more than or equal to 3 rows, 5 columns or more than 5 columns are arranged at the upper part of each prefabricated part, concrete of the laminated layer is more than or equal to 40mm and less than or equal to 60mm, concrete solid ribs are arranged between adjacent filling pieces of each prefabricated part, the height of the solid ribs is more than or equal to 50mm, 2 or equal to 2 prefabricated parts are connected in parallel, the extending sections of the bottom plate reinforcing steel bars between the adjacent prefabricated parts are mutually overlapped in a splicing joint area, the extending sections of the bottom plate reinforcing steel bars are all anchored into beam or wall supports of a peripheral ring except for the splicing joint area, the upper reinforcing steel bars, the laminated slab concrete is cast at the minimum thickness of the laminated slab is more than or equal to 60mm and less than or equal to 60 mm.
The invention is characterized in that when the laminated slab is a bidirectional slab, the post-cast strip width of the joint area of the adjacent prefabricated members is more than or equal to 100mm and less than 200mm, in the joint area, the bottom plate steel bars between the adjacent prefabricated members are bent upwards, and 2 pressing bars are arranged at the bending positions of the bottom plate steel bars so as to strengthen the anchoring.
The invention is characterized in that the rings are pre-embedded at the corresponding positions on the solid ribs of different prefabricated members, and the tie bars pass through the rings to connect the different prefabricated members.
The invention is characterized in that post-tensioning unbonded or bonded or slow-bonded prestressed tendons are arranged in the joint areas between adjacent prefabricated members.
The invention is characterized in that the main material of the filling piece is polyphenyl foam or hard plastic, chamfers are arranged on the circumference of the upper surface and the lower surface of the filling piece, a vertical slurry leakage hole is arranged in the middle of the filling piece, the upper end of the slurry leakage hole is in a funnel shape with a big upper part and a big lower part, and the lower end of the slurry leakage hole is in an inverted funnel shape with a big upper part and a big lower part.
The manufacturing method of the wide hollow superimposed sheet provided by the invention comprises the following steps: the laminated slab is of a reinforced concrete structure and comprises prefabricated parts at the bottom and a superimposed layer at the upper part, wherein the prefabricated parts are strip-shaped, the width of each prefabricated part is larger than or equal to 2000mm and smaller than or equal to 3500mm, the length is larger than or equal to 5000mm and smaller than or equal to 10000mm, the thickness of the bottom plate concrete of each prefabricated part is larger than or equal to 40mm and smaller than or equal to 65mm, bottom plate steel bars are arranged in the bottom plate in a bidirectional mode, the length of the bottom plate steel bars extending out of the concrete of the bottom plate is larger than or equal to 50mm, filling pieces of light materials with the thickness of more than or equal to 3 rows, 5 columns or more than 5 columns are arranged at the upper part of each prefabricated part, concrete solid ribs with the height of more than or equal to 50mm are arranged between adjacent filling pieces of each prefabricated part, 2 or more prefabricated parts are connected in parallel, the bottom plate steel bars between the adjacent prefabricated parts are mutually overlapped at a joint area, the extending sections of the bottom plate steel bars except the joint area are anchored into a beam or a wall support of a periphery, the upper steel bar of the bound spliced slab, the concrete of the superimposed layer is cast, and the minimum thickness of the superimposed layer concrete is larger than or equal to 40mm and smaller than or equal to 60mm are formed.
The manufacturing method of the wide hollow laminated slab is characterized in that when the laminated slab is a bidirectional slab, the post-cast strip width of the splicing seam area of the adjacent prefabricated members is more than or equal to 100mm and less than 200mm, in the splicing seam area, the bottom plate steel bars between the adjacent prefabricated members are bent upwards, and 2 pressing bars are arranged at the bending positions of the bottom plate steel bars to strengthen anchoring.
The invention discloses a manufacturing method of a wide hollow laminated slab, which is characterized in that hanging rings are pre-embedded at corresponding positions on solid ribs of different prefabricated parts, and tie bars penetrate through the hanging rings to connect the different prefabricated parts.
The invention relates to a manufacturing method of a wide hollow laminated slab, which is characterized in that post-tensioning unbonded or bonded or slowly bonded prestressed tendons are arranged in a joint area between adjacent prefabricated members.
The invention relates to a manufacturing method of a wide hollow superimposed sheet, which is characterized in that a main material of a filling piece is polyphenyl foam or hard plastic, chamfers are arranged on the circumference of the upper surface and the lower surface of the filling piece, a vertical slurry leakage hole is arranged in the middle of the filling piece, the upper end of the slurry leakage hole is in a funnel shape with a big upper part and a small lower part, and the lower end of the slurry leakage hole is in an inverted funnel shape with a big upper part and a big lower part.
After the scheme is adopted, compared with the prior art, the invention has the following beneficial effects:
according to the specification of the assembled concrete structure (JGJ-2014) 6.6.2, the prefabricated thickness of the laminated slab is not less than 60mm, and the thickness of a post-cast concrete laminated layer is not less than 60 mm; according to the technical scheme, the filling pieces are adopted, the thickness of the bottom plate concrete of the prefabricated piece is more than or equal to 40mm and less than or equal to 65mm, the dead weight of the prefabricated piece is greatly reduced, but the existence of the concrete solid ribs in the longitudinal and transverse directions between the adjacent filling pieces is achieved, the height of the solid ribs is more than or equal to 50mm, the rigidity of the prefabricated piece in the two directions is improved, and the member has good transportation and lifting performances. The invention is characterized in that 3 rows or more than 3 rows, 5 columns or more than 5 columns of filling pieces of light materials are arranged at the upper part of each prefabricated member, so that the prefabricated members are relatively light and the solid ribs are uniformly distributed, the width of each prefabricated member can be more than or equal to 2000mm, the construction efficiency is improved, and the material consumption of a joint area is saved. The extension length of the bottom plate steel bars from the concrete of the bottom plate is more than or equal to 50mm, and the extension sections of the bottom plate steel bars except the joint area are anchored into the beams or wall supports of the peripheral ring, so that the integral stress of the laminated slab can be ensured. The bottom plate reinforcing steel bars between adjacent prefabricated members overlap joint each other in the joint area for external force can effectively transmit between different prefabricated members, reaches the technical effect of two-way atress. Since the preforms in the present invention are relatively light, 5000mm and 10000mm are the minimum and maximum economic spans of the present invention, respectively.
The integral joint on the sheet side of the two-way laminate in JGJ-2014, item 6.6.6, provides that the integral joint is preferably located in the secondary stress direction of the laminate and preferably avoids the maximum bending moment cross section. The seam may take the form of a post-cast strip and should meet the following specifications: 1, the width of the post-cast strip is not smaller than the prefabricated thickness of the joint and is not smaller than 60mm, and the thickness of the post-cast concrete superposed layer is not smaller than 200mm … …'; according to the invention, the bottom plate steel bars in the joint area between adjacent prefabricated members are bent upwards, and 2 pressing bars are arranged at the bending positions of the steel bars to strengthen anchoring, so that the post-cast strip width is more than or equal to 100mm and less than 200mm, the steel bar consumption of the joint area can be reduced, the specific gravity of a pure solid area is reduced, and the self weight of the laminated plate structure is reduced. Hanging rings are pre-buried at corresponding positions on solid ribs of different prefabricated members, the hanging rings can serve as acting points in the construction hanging process, tie bars penetrate through the hanging rings, different prefabricated members are connected, and the integrity of the laminated slab can be enhanced. The post-tensioning prestressed tendons are arranged in the joint region, so that the overall anti-cracking performance and anti-deformation performance of the laminated slab can be improved, and the application span of the laminated slab can be increased. The upper surface and the lower surface of the filling piece are chamfered, so that on one hand, stress concentration is eliminated, and the phenomenon of abrupt thickness change does not occur; on the other hand, the concrete at the upper part of the filling piece is an arch cover, so that the capability of bearing concentrated load on the floor can be greatly enhanced, and the chamfer angle or chamfer angle at the lower part of the filling piece can facilitate the pouring of the concrete. A vertical slurry leakage hole is formed in the middle of the filling piece, and the upper funnel of the slurry leakage hole can greatly accelerate the speed of concrete flowing into the slurry leakage hole on the premise that the cross dimension of the slurry leakage hole is as small as possible; the lower hopper can ensure that coarse aggregate in the concrete can flow to the lower part of the filling piece rapidly and without barriers; after the concrete is formed, the concrete in the slurry leakage hole is equivalent to adding a connecting column between the concrete plates on the upper surface and the lower surface of the filling piece, and the upper end and the lower end of the connecting column are provided with enlarged heads, so that the mechanical mechanism of the connecting column is the same as that of a column cap in a plate column structure.
The prefabricated member in the wide hollow laminated slab has light dead weight, large rigidity in the longitudinal and transverse directions and large applicable span, can be applicable to a two-way plate and is convenient to transport and install. The invention has good economy and applicability, and plays a role in promoting the development of building technology.
(IV) description of the drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a plan view of a laminated sheet according to the present invention
FIG. 2 is a schematic view of the structure of the vertical section of the laminated slab of the present invention
FIG. 3 is a plan view of a single preform in a laminate of the present invention
FIG. 4 is a cross-sectional view of the preform of FIG. 3 taken along line A-A
FIG. 5 is a detailed view of the vertical section of the laminated slab of the present invention
FIG. 6 is a partial large-scale view of the splice area of FIG. 5
FIG. 7 is a schematic view of a vertical cross-sectional configuration of a filler
FIG. 8 is a top view of the packing element
In the figure: 1. prefabricated parts, 2, laminated layers, 3, bottom plates, 4, bottom plate reinforcing steel bars, 5, filling pieces, 6, solid ribs, 7, joint areas, 8, supports, 9, upper reinforcing steel bars, 10, pressing bars, 11, hanging rings, 12, drawknot reinforcing steel bars, 13, prestress reinforcing steel bars and 14, leakage holes.
(fifth) detailed description of the invention
The invention is realized in the following way:
in the embodiment shown in the figures 1-6, the composite slab is in a reinforced concrete structure and comprises a prefabricated part (1) at the bottom and a composite layer (2) at the upper part, wherein the prefabricated part (1) is in a strip shape, the width of each prefabricated part (1) is more than or equal to 2000mm and less than or equal to 3500mm, the length is more than or equal to 5000mm and less than or equal to 10000mm, the concrete thickness of a bottom plate (3) of the prefabricated part (1) is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars (4) are bidirectionally arranged in the bottom plate (3), the length of the bottom plate steel bars (4) extending out of the concrete of the bottom plate (3) is more than or equal to 50mm, and filling pieces (5) of light materials in 3 rows or more than 3 rows, 5 columns or more than 5 columns are arranged at the upper part of each prefabricated part (1), the concrete solid ribs (6) are arranged between adjacent filling pieces (5) in each prefabricated member (1), the height of the solid ribs (6) is more than or equal to 50mm, 2 or more than 2 prefabricated members (1) are connected in parallel, the bottom plate reinforcing steel bars (4) between the adjacent prefabricated members (1) are mutually overlapped in the joint area (7), the extending sections of the bottom plate reinforcing steel bars (4) except the joint area (7) of the prefabricated members (1) are anchored into the beam or wall support (8) of the peripheral ring, the upper reinforcing steel bars (9) of the laminated plates are bound, the concrete of the laminated layers (2) is poured, and the minimum thickness of the concrete of the laminated layers (2) is more than or equal to 40mm and less than or equal to 60mm, so that the laminated plates are formed.
In the embodiment shown in fig. 1, 5 and 6, when the superimposed sheet is a bidirectional plate, the post-cast strip width of the joint area (7) of the adjacent prefabricated members (1) is more than or equal to 100mm and less than 200mm, in the joint area (7), the bottom plate steel bars (4) between the adjacent prefabricated members (1) are bent upwards, and 2 pressing bars (10) are arranged at the bending positions of the bottom plate steel bars (4) to strengthen the anchoring.
In the embodiments shown in fig. 1, 3-6, the hanging rings (11) are pre-buried at corresponding positions on the solid ribs (6) of different prefabricated members (1), and the tie bars (12) penetrate through the hanging rings (11) to connect the different prefabricated members (1).
In the embodiment shown in fig. 5 and 6, post-tensioning unbonded or bonded or slow-bonded prestressed tendons (13) are arranged in the joint areas (7) between adjacent prefabricated members (1).
In the embodiment shown in fig. 7 and 8, the main material of the filling member is polystyrene foam or hard plastic, chamfers are arranged on the circumference of the upper surface and the lower surface of the filling member (5), a vertical slurry leakage hole (14) is arranged in the middle of the filling member (5), the upper end of the slurry leakage hole (14) is in a funnel shape with a large upper part and a small lower part, and the lower end of the slurry leakage hole is in an inverted funnel shape with a large upper part and a large lower part.
In the embodiment shown in fig. 1 to 6, a method for manufacturing a wide hollow composite slab is as follows: the laminated slab is a reinforced concrete structure and comprises a prefabricated part (1) at the bottom and a laminated layer (2) at the upper part, wherein the prefabricated part (1) is in a strip shape, the concrete thickness of a bottom plate (3) of the prefabricated part (1) is more than or equal to 35mm and less than or equal to 60mm, pretensioning prestressed steel wires (4) are arranged in the bottom plate (3) in a long direction, single prestressed steel wires (4) are high-strength steel wires with the diameter of 4-7mm, transverse steel bars (5) are arranged in a short direction, the prestressed steel wires (4) are positioned at the upper part of the transverse steel bars (5), the extension length of the prestressed steel wires (4) and the transverse steel bars (5) from the prefabricated concrete of the bottom plate (3) is more than or equal to 50mm, the width of each prefabricated part (1) is more than or equal to 1500mm and less than or equal to 3500mm, the length is more than or equal to 6000mm and less than or equal to 14000mm, 2 rows or more than 2 rows, 4 columns or more than 4 columns of light material filling pieces (6) are arranged at the upper part of each prefabricated member (1), concrete solid ribs (7) are arranged between adjacent filling pieces (6) in each prefabricated member (1), the height of the solid ribs (7) is more than or equal to 50mm, 3 or more prefabricated members (1) are connected in parallel, transverse steel bars (5) between adjacent prefabricated members (1) are mutually overlapped in a splicing area (8), prestressed steel wires (4) except the splicing area (8) in the prefabricated members (1) and the extending sections of the transverse steel bars (5), are anchored into the beam or wall support (9) of the peripheral ring, the upper reinforcing steel bars (10) of the laminated plates are bound, the concrete of the laminated layer (2) is poured, and the minimum thickness of the concrete of the laminated layer (2) is more than or equal to 40mm and less than or equal to 60mm, so that the laminated plates are formed.
In the embodiments shown in fig. 1, 5 and 6, a method for manufacturing a wide hollow composite slab is as follows: when the laminated slab is a bidirectional slab, the post-pouring band width of the joint area (7) of the adjacent prefabricated members (1) is more than or equal to 100mm and less than 200mm, in the joint area (7), the bottom plate steel bars (4) between the adjacent prefabricated members (1) are bent upwards, and 2 pressing bars (10) are arranged at the bending positions of the bottom plate steel bars (4) to strengthen the anchoring.
In the embodiments shown in fig. 1 and fig. 3 to fig. 6, a method for manufacturing a wide hollow composite slab is as follows: hanging rings (11) are pre-buried at corresponding positions on solid ribs (6) of different prefabricated members (1), and tie bars (12) penetrate through the hanging rings (11) to connect the different prefabricated members (1).
In the embodiment shown in fig. 5 and 6, a method for manufacturing the wide hollow laminated slab is as follows: post-tensioning unbonded or bonded or slow-bonded prestressed tendons (13) are arranged in the joint areas (7) between the adjacent prefabricated members (1).
In the embodiment shown in fig. 7 and 8, a method for manufacturing the wide hollow laminated slab is as follows: the main material of the filling piece is polyphenyl foam or hard plastic, chamfers are arranged on the circumference of the upper surface and the lower surface of the filling piece (5), a vertical slurry leakage hole (14) is arranged in the middle of the filling piece (5), the upper end of the slurry leakage hole (14) is in a funnel shape with a big upper part and a small lower part, and the lower end of the slurry leakage hole is in an inverted funnel shape with a big upper part and a big lower part.
Claims (10)
1. The wide hollow laminated slab is a reinforced concrete bidirectional plate structure and comprises a prefabricated part (1) at the bottom and a laminated layer (2) at the upper part, and is characterized in that the prefabricated part (1) is strip-shaped, the width of each prefabricated part (1) is more than or equal to 2000mm and less than or equal to 3500mm, the length is more than or equal to 5000mm and less than or equal to 10000mm, the concrete thickness of a bottom plate (3) of the prefabricated part (1) is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars (4) are arranged in the bottom plate (3) in a bidirectional manner, the length of the bottom plate steel bars (4) extending out of the concrete of the bottom plate (3) is more than or equal to 50mm, and filling pieces (5) of light materials with the length of more than or equal to 3 rows, 5 columns or more than 5 columns are arranged at the upper part of each prefabricated part (1), a concrete solid rib (6) is arranged between adjacent filling pieces (5) in each prefabricated member (1), the height of the solid rib (6) is more than or equal to 50mm, 2 or more prefabricated members (1) are connected in parallel, the bottom plate reinforcing steel bars (4) between the adjacent prefabricated members (1) are mutually overlapped in a joint area (7), the extending sections of the bottom plate reinforcing steel bars (4) except the joint area (7) of the prefabricated members (1) are anchored into a beam or wall support (8) of a peripheral ring, the upper reinforcing steel bars (9) of the laminated plates are bound, concrete of the laminated layers (2) is poured, the minimum thickness of the concrete of the laminated layers (2) is more than or equal to 40mm and less than or equal to 60mm, and the concrete of the laminated layers (2) is in the joint area (7), and the bottom plate steel bars (4) between the adjacent prefabricated members (1) are bent upwards, and 2 pressing bars (10) are arranged at the bending positions of the bottom plate steel bars (4) to strengthen the anchoring, so that the laminated plate is formed.
2. A wide hollow superimposed sheet according to claim 1, characterized in that the post-cast strip width of the joint area (7) of adjacent preforms (1) is not less than 100mm and less than 200mm.
3. A broad width hollow superimposed sheet according to claim 1, characterized in that the hoisting rings (11) are embedded in corresponding positions on the solid ribs (6) of the different prefabricated members (1), and that tie bars (12) are passed through the hoisting rings (11) to connect the different prefabricated members (1).
4. A broad width hollow composite slab according to claim 1, characterized in that post-tensioning unbonded or bonded or slow bonded tendons (13) are arranged in the joint area (7) between adjacent preforms (1).
5. The wide hollow laminated slab according to claim 1, wherein the main material of the filling member is polyphenyl foam or hard plastic, chamfers are arranged on the circumference of the upper surface and the lower surface of the filling member (5), a vertical slurry leakage hole (14) is arranged in the middle of the filling member (5), the upper end of the slurry leakage hole (14) is in a funnel shape with a large upper part and a small lower part, and the lower end of the slurry leakage hole is in an inverted funnel shape with a small upper part and a large lower part.
6. The method for manufacturing the wide hollow laminated slab according to claim 1, which is characterized in that the laminated slab is a reinforced concrete two-way plate structure and comprises prefabricated members (1) at the bottom and a laminated layer (2) at the upper part, wherein the prefabricated members (1) are strip-shaped, the width of each prefabricated member (1) is more than or equal to 2000mm and less than or equal to 3500mm, the length is more than or equal to 5000mm and less than or equal to 10000mm, the concrete thickness of a bottom plate (3) of the prefabricated member (1) is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars (4) are bidirectionally arranged in the bottom plate (3), the extension length of the bottom plate steel bars (4) from the concrete of the bottom plate (3) is more than or equal to 50mm, and filling pieces (5) of light materials with the length of more than or equal to 3 rows, 5 columns or more than 5 columns are arranged at the upper part of each prefabricated member (1), a concrete solid rib (6) is arranged between adjacent filling pieces (5) in each prefabricated member (1), the height of the solid rib (6) is more than or equal to 50mm, 2 or more prefabricated members (1) are connected in parallel, the bottom plate reinforcing steel bars (4) between the adjacent prefabricated members (1) are mutually overlapped in a joint area (7), the extending sections of the bottom plate reinforcing steel bars (4) except the joint area (7) of the prefabricated members (1) are anchored into a beam or wall support (8) of a peripheral ring, the upper reinforcing steel bars (9) of the laminated plates are bound, the concrete of the laminated layers (2) is poured, the minimum thickness of the concrete of the laminated layers (2) is more than or equal to 40mm and less than or equal to 60mm, in the joint region (7), the bottom plate steel bars (4) between the adjacent prefabricated members (1) are bent upwards, and 2 pressing bars (10) are arranged at the bending positions of the bottom plate steel bars (4) to strengthen the anchoring, so that the laminated plate is formed.
7. The method for manufacturing the wide hollow superimposed sheet according to claim 6, characterized in that the post-cast strip width of the joint area (7) of the adjacent prefabricated members (1) is more than or equal to 100mm and less than 200mm.
8. The method for manufacturing the wide hollow laminated slab according to claim 6, wherein the hanging rings (11) are embedded at corresponding positions on the solid ribs (6) of different prefabricated members (1), and the tie bars (12) penetrate through the hanging rings (11) to connect the different prefabricated members (1).
9. A method of manufacturing a wide hollow composite slab according to claim 6, characterized in that post-tensioning unbonded or bonded or slow bonded tendons (13) are arranged in the joint area (7) between adjacent preforms (1).
10. The method for manufacturing the wide hollow superimposed sheet according to claim 6, wherein the main material of the filling member is polyphenyl foam or hard plastic, chamfers are arranged on the circumference of the upper surface and the lower surface of the filling member (5), a vertical slurry leakage hole (14) is arranged in the middle of the filling member (5), the upper end of the slurry leakage hole (14) is in a funnel shape with a large upper part and a small lower part, and the lower end of the slurry leakage hole is in an inverted funnel shape with a small upper part and a large lower part.
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| CN201710658141.6A CN107254930B (en) | 2017-08-04 | 2017-08-04 | Broad-width hollow superimposed sheet |
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| CN201710658141.6A CN107254930B (en) | 2017-08-04 | 2017-08-04 | Broad-width hollow superimposed sheet |
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| CN107254930B true CN107254930B (en) | 2023-09-08 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112302227A (en) * | 2020-12-07 | 2021-02-02 | 徐焱 | Hollow superimposed sheet with drawknot support |
| CN115262835B (en) * | 2022-09-06 | 2023-08-01 | 中机中联工程有限公司 | Construction method and connection structure of short-rib-outlet truss reinforced concrete composite slab |
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