CN112878563A - Hollow superimposed sheet with steel bar truss - Google Patents
Hollow superimposed sheet with steel bar truss Download PDFInfo
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- CN112878563A CN112878563A CN202110317312.5A CN202110317312A CN112878563A CN 112878563 A CN112878563 A CN 112878563A CN 202110317312 A CN202110317312 A CN 202110317312A CN 112878563 A CN112878563 A CN 112878563A
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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
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The invention relates to a hollow composite slab with a steel bar truss and a manufacturing method thereof, belonging to the field of general building structures. The composite slab comprises a bottom prefabricated part (1) and an upper laminated layer (2), the prefabricated part is in a long strip shape, two-way configuration of bottom plate reinforcing steel bars (4) is performed in a bottom plate (3) of the prefabricated part, 3 rows or more than 3 rows, 5 rows or more than 5 rows of filling bodies (5) of light materials are arranged on the upper portion of each prefabricated part, reinforcing steel bar trusses (8) are embedded in at least two longitudinal solid ribs, transverse supports (12) are installed in at least 3 transverse solid ribs, the prefabricated parts above 2 or 2 are connected in parallel, upper reinforcing steel bars (17) of the composite slab are placed on the reinforcing steel bar trusses or the transverse supports, and concrete is poured to form the composite slab. The laminated slab has the advantages of light dead weight, large applicable span and convenient transportation and installation, has good economical efficiency and applicability, and plays a role in promoting the development of building technology.
Description
(I) technical field
The invention relates to an assembly type reinforced concrete hollow floor structure, in particular to a hollow laminated slab with a steel bar truss and a manufacturing method thereof, belonging to the field of general building structures.
(II) background of the invention
The assembly type building has the characteristics of high factory production degree, high construction speed and low comprehensive cost, and the structural form is widely popularized by the nation at present.
For the assembled floor system with the span of less than 5m, the common laminated slab can solve the problem; however, if the floor with the span of more than 5m, especially the span of more than 7m is adopted, the structure has heavy self weight, poor earthquake-resistant performance and lower comprehensive economic index. For the floor structure, no matter cast-in-place or laminated structure, hollowing is a technical means for solving the problem of large span.
Before 2004, the maximum span of the traditional laminated floor system does not exceed 6m, and then a prestressed bidirectional laminated floor system (CN2642887Y) is proposed by Xuanxiao, Wangxiang and the like. Then, gaoyianyu, wushunhong, etc. proposed "prestressed concrete laminated slab" (CN2706530), "honeycomb hole type ribbed prestressed concrete laminated slab" (CN102995805A) and "a box type prestressed concrete lightweight laminated slab" (CN 203603332U). However, the above techniques exist separately: the prefabricated member has the defects of small width, large self weight or poor connection performance between adjacent prefabricated members, and is only suitable for unidirectional plates.
In 2017, the inventor respectively provides a technology of 'a wide hollow laminated slab' (CN107254930A) and 'a prestressed hollow laminated slab' (CN107313539A), and overcomes the defects that a prefabricated part is small in width, heavy in self weight and not suitable for a bidirectional slab; in 2020, the inventor also proposed "a hollow laminated plate with a drawknot bracket" (CN 112302227A). In tens of tests, i found that CN107254930A and CN107313539A had the following problems: 1. the concrete prefabricated and cast-in-place in the hollow composite slab is only contacted with the solid ribs among the filling bodies, the contact area is small, so that the bonding force among new and old concrete is insufficient, and the bearing capacity of the member is reduced due to split cracks generated on the contact surface along the horizontal direction of the member; 2. because the hollow slab composite slab has larger span than the traditional composite slab, even if the prefabricated member is relatively thicker, the rigidity of the prefabricated member is weaker during hoisting transportation because the proportion of the solid ribs occupying the total area is very small; 3. the strength of the filler in the prefabricated member is low, and the filler is easy to damage when a plurality of prefabricated members are stacked and transported. Although CN112302227A can effectively overcome the above drawbacks, the drawknot stent adopted in CN112302227A still has the following drawbacks: 1. if the anchoring length of the supporting leg is not enough, the safety accident is easily caused when the supporting leg is pulled out during hoisting; 2. the support legs of the drawknot bracket are approximately vertical to the prefabricated members, and the steel bars are easy to bend and lose stability under heavy load (such as stacking and transporting a plurality of prefabricated members); 3. the horizontal rod is connected with the tops of the supporting legs in a welding or binding mode, so that the production efficiency of the drawknot bracket is low.
Under the circumstances, the development of a laminated slab technology for overcoming the defects is an urgent problem to be solved in the current assembled laminated floor system.
Disclosure of the invention
In the existing assembled type laminated floor system technology, the following exists: 1. the prefabricated part has small span, self weight and rigidity; 2. the width of the prefabricated part is small; 3. the connection performance between adjacent prefabricated parts is poor, and the prefabricated parts are not suitable for bidirectional plates; 4. the hollow prefabricated member and the laminated layer have poor combination performance of new and old concrete, and the filling body is easy to damage; 5. the hoisting performance is poor; 6. the transport performance is poor; 7. the invention aims to provide a hollow composite slab with a steel bar truss.
In order to achieve the purpose, on the basis of the prior art and experiments, the technical scheme adopted by the invention is as follows: a hollow composite slab with steel bar trusses is of a reinforced concrete structure and comprises prefabricated parts at the bottom and a composite layer at the upper part, the prefabricated parts are long-strip-shaped, the width of each prefabricated part is more than or equal to 1800mm 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 the prefabricated parts is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars are arranged in the bottom plate in a bidirectional mode, filler bodies made of light materials with more than 3 rows or 5 columns or more than 5 columns are arranged at the upper part of each prefabricated part, concrete longitudinal solid ribs or transverse solid ribs are arranged between adjacent filler bodies in the prefabricated parts or at the edges of the filler bodies, the steel bar trusses are embedded in at least two longitudinal solid ribs, each steel bar truss is composed of an upper chord rib, two lower chord ribs and web ribs at two, each transverse support is composed of a transverse rib and at least 3 supporting legs, the transverse rib of each transverse support is positioned at the upper part of the upper chord rib of the steel bar truss, the lower parts of the supporting legs are anchored in concrete of prefabricated parts, 2 or more than 2 prefabricated parts are connected in parallel, bottom plate steel bars between adjacent prefabricated parts are mutually overlapped in a splicing region, extending sections of the bottom plate steel bars of the prefabricated parts except the splicing region are all anchored into a beam or a wall support of a periphery, upper steel bars of the laminated slab are placed on the steel bar truss or the transverse supports, the upper steel bars are bound, laminated concrete is poured, the minimum thickness of the concrete of a laminated layer on the upper part of the filling body is more than or equal to 40mm and less than or equal to 100mm, and the laminated slab is formed. The width of each prefabricated part is more than or equal to 1800mm and less than or equal to 3500mm, so that the number of the prefabricated parts in the floor slab can be reduced, and the proportion of the joint area cost in the total manufacturing cost is reduced. The length of the prefabricated member is more than or equal to 5000mm and less than or equal to 10000mm, so that the laminated slab can be suitable for large span and meet the normal transportation requirement. The upper part of each prefabricated member is provided with 3 rows or more than 3 rows, 5 columns or more than 5 columns of light material filling bodies, and the longitudinal solid ribs and the transverse solid ribs between the adjacent filling bodies or at the edges in each prefabricated member can improve the hollow rate of the prefabricated member and ensure that enough solid ribs participate in structural stress. The filling body can be arranged on the prefabricated member in advance, and can also be embedded after the concrete of the prefabricated member is formed and hardened. The inventor finds in a component experiment that the closer to a splicing region, the more easily horizontal split cracks appear between a prefabricated part and a superposed layer, so that a solid rib near the splicing region belongs to a weak part and special measures are taken to strengthen the tensile joint. The steel bar trusses are embedded in the at least two longitudinal solid ribs, are of spatial three-dimensional structures and have triangular stability horizontally in two directions, so that the rigidity in any direction is very high, and the prefabricated parts are suitable for being stacked up and down for storage and transportation; the upper chord rib of the steel bar truss can increase the rigidity of the prefabricated member, the prefabricated member is not easy to crack during hoisting, the anchoring performance of the web rib in the prefabricated member is good due to the fact that the web rib is connected with the lower chord rib, the hoisting safety is enhanced, and the lower chord rib can be used as a stress rib for two purposes; the steel bar truss can realize automatic flow production and has high production efficiency. The installation of the transverse brackets in at least 3 transverse solid ribs is primarily to increase the transverse rigidity of the prefabricated member, since the vertical forces during production and transport are mainly borne by the steel bar trusses, and the transverse brackets can be designed simply to reduce the production cost by only dispersing the vertical forces. The top height of the steel bar truss exceeds the top height of the filling body, and when the filling body is embedded in advance, the steel bar truss and the transverse support can protect the filling body in the production and transportation processes. In site operation, 2 or more than 2 prefabricated parts are connected in parallel, the steel bars on the upper part of the laminated slab are placed on the steel bar truss or the transverse support and then bound, the steel bar truss and the transverse support play the role of a steel bar stirrup or a vertical bar, and related material cost and manufacturing cost can be saved.
The invention is characterized in that the longitudinal steel bar in the prefabricated member bottom plate steel bar is positioned at the upper part of the transverse steel bar, the web rib of the steel bar truss is of a broken line type, the diameter of the upper chord rib is more than or equal to 8mm, the diameter of the lower chord rib is more than or equal to that of the longitudinal steel bar, and the lower chord rib and the longitudinal steel bar are positioned at the same layer. The longitudinal steel bar is positioned at the upper part of the transverse steel bar, so that the lower chord steel bar and the longitudinal steel bar can be positioned at the same layer, the lower chord steel bar can be used as an anchoring measure of the web bar and can also participate in stress, and when the diameter is larger than or equal to that of the longitudinal steel bar, the lower chord steel bar can directly replace the longitudinal steel bar to reduce the manufacturing cost of the prefabricated member.
The invention is characterized in that the legs of the transverse support are partially encrypted in the region of the two ends. The supporting legs are only partially encrypted within the range of the end head with larger stress, so that the manufacturing cost can be reduced; if the end is positioned in the abutted seam area with larger bending moment, the supporting legs can enhance the bonding between the prefabricated part near the area and the cast-in-place concrete; if the end head is positioned on the side support with larger shearing force, the supporting leg can improve the shearing resistance of the section near the support.
The invention is characterized in that a drawknot steel bar is pre-embedded in part of the longitudinal solid rib or the transverse solid rib of the prefabricated member, and the embedding depth and the exposed length of the drawknot steel bar in the concrete of the prefabricated member are both more than or equal to 30 mm. The invention aims to solve the technical problem that the splitting phenomenon is caused by insufficient tension force of a hollow prefabricated member and superposed layer concrete, the problem can be solved by embedding a steel bar truss or a transverse bracket in a solid rib, but the cost of the hollow prefabricated member and the superposed layer concrete is relatively higher, the installation is slightly complicated, when the problems of hoisting, transporting and protecting a filler of the prefabricated member are solved, in order to further improve the splitting resistance, the embedded steel bar rod for preventing horizontal shearing damage is a cheap, simple and efficient technical scheme, the steel bar rod only plays a pin bolt role, and therefore, the embedded steel bar rod does not need to be too long to be more than or equal to 30mm when being embedded or exposed.
The invention is characterized in that when the laminated slab is a bidirectional slab, the width of a post-cast strip in a splicing region of adjacent prefabricated components is more than or equal to 100mm and less than or equal to 300mm, in the splicing region, transverse steel bars between the adjacent prefabricated components are bent upwards, and 2 press bars are arranged at the bending positions of the transverse steel bars. The press rib can participate in the bending resistance stress in the short span direction of the bidirectional plate, and can also enhance the anchoring performance of the transverse steel bar in the splicing region.
The present invention features that the longitudinal reinforcing steel bars in the prefabricated part are all or partially high strength prestressed reinforcing steel bars. After the prestressed reinforcing steel is adopted, the using amount of the reinforcing steel can be reduced, the manufacturing cost of the prefabricated member can be reduced, the anti-cracking capacity of the laminated slab in the normal use process can be improved, and the durability of the structure is better.
The present invention features that the filler is set in the back, notch in the size and shape fitting the filler is reserved in the prefabricated part forming process, and the filler is embedded into the notch after the prefabricated part is formed. By adopting the technical scheme of embedding the filler, the phenomenon that the filler is damaged in the processes of manufacturing, transporting and hoisting of the prefabricated member can be avoided, and in field construction, pipelines, lamp caps and the like which need to be embedded in the laminated slab can be arranged in the region with the thinnest concrete at the lower part of the filler, so that the workload of cutting and opening the concrete is reduced; when the pipeline and the like conflict with the position of the filling body, corresponding treatment is carried out on the filling body easy to cut and drill, and the pipeline construction can be facilitated.
The invention is characterized in that when the filling body is placed in advance, the main material is polyphenyl foam or rigid plastic, chamfers are arranged on the periphery of the upper surface and the lower surface of the filling body, a vertical slurry leakage hole is arranged in the middle of the filling body, the upper end of the slurry leakage hole 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. The peripheries of the upper surface and the lower surface of the filling body are chamfered, so that the phenomena of stress concentration and thickness mutation are eliminated; on the other hand, the concrete on the upper part of the filling body is an arch cover, so that the capability of bearing concentrated load of a floor can be greatly enhanced, and the chamfer angle or chamfer angle on the lower part of the filling body can facilitate the pouring of the concrete. A vertical slurry leakage hole is formed in the middle of the filling body, and the upper funnel of the slurry leakage hole greatly accelerates the speed of concrete flowing into the slurry leakage hole; the lower funnel can ensure that coarse aggregate in the concrete can flow to the lower part of the filling body rapidly and without obstacles, and ensure that the concrete is poured compactly.
The invention relates to a method for manufacturing a hollow composite slab with a steel bar truss, which comprises the following steps: the composite slab is of a reinforced concrete structure and comprises prefabricated components at the bottom and a laminated layer at the upper part, the prefabricated components are in a long strip shape, the width of each prefabricated component is more than or equal to 1800mm and less than or equal to 3500mm, the length of each prefabricated component is more than or equal to 5000mm and less than or equal to 10000mm, the thickness of bottom plate concrete of the prefabricated components is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars are arranged in a two-way mode, filler bodies made of light materials with more than 3 rows or more than 3 rows and 5 columns or more than 5 columns are arranged at the upper part of each prefabricated component, concrete longitudinal solid ribs or transverse solid ribs are arranged between adjacent filler bodies in the prefabricated components or at the edges of the filler bodies, steel bar trusses are pre-embedded in at least two longitudinal solid ribs, each steel bar truss is composed of an upper chord rib, two lower chord ribs and web ribs on two sides, the top height of the steel bar trusses exceeds, the transverse ribs of the transverse support are positioned on the upper portions of upper chord ribs of the steel bar truss, the lower portions of the supporting legs are anchored in concrete of prefabricated parts, 2 or more than 2 prefabricated parts are connected in parallel, bottom plate steel bars between adjacent prefabricated parts are mutually overlapped in a splicing region, extending sections of the bottom plate steel bars of the prefabricated parts except the splicing region are all anchored into a circumferential beam or wall support, upper steel bars of the laminated slab are placed on the steel bar truss or the transverse support, the upper steel bars are bound, laminated layer concrete is poured, the minimum thickness of the concrete of the laminated layer on the upper portion of the filler is larger than or equal to 40mm and smaller than or equal to 100mm, and the laminated slab is formed.
The invention relates to a method for manufacturing a hollow laminated slab with a steel bar truss, which is characterized in that a longitudinal steel bar in a bottom plate steel bar of a prefabricated member is positioned at the upper part of a transverse steel bar, a web rib of the steel bar truss is of a broken line type, the diameter of an upper chord rib is more than or equal to 8mm, the diameter of a lower chord rib is more than or equal to that of the longitudinal steel bar, and the lower chord rib and the longitudinal steel bar are positioned on the same layer.
After adopting the scheme, compared with the prior art, the invention has the following beneficial effects:
the invention firstly overcomes the defects of small applicable span and large self weight of the prefabricated member of the traditional solid laminated slab, and compared with the prior art such as CN112302227A and the like, the invention has very obvious effect: 1. the problem that horizontal split cracks are easy to occur between the prefabricated part and the laminated layer of the hollow laminated slab is solved; 2. the rigidity of the prefabricated part is increased, so that the transportation and the stacking of the components are facilitated; 3. a plurality of hoisting points are formed on the steel bar truss, so that the prefabricated member can be conveniently hoisted; 4. the existence of the steel bar truss and the transverse support increases the protection strength of the filling body; 5. the steel bar truss and the transverse bracket can be used as erection bars of upper steel bars in later construction, so that related manpower and material resources can be saved; 6. the bending or shearing resistance of the member is enhanced.
The prefabricated components in the hollow composite slab with the steel bar truss have light dead weight, good concrete combination of the prefabricated and composite layers, large applicable span, suitability for bidirectional slabs and convenience in transportation and installation. The invention has good economical efficiency 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 board of the present invention
FIG. 2 is a schematic view showing a vertical cross-sectional structure of a laminated slab according to the present invention
FIG. 3 is a plan view of a single preform in a composite panel of the present invention
FIG. 4 is a cross-sectional view A-A of the preform of FIG. 3
FIG. 5 is a schematic view of a steel truss structure
FIG. 6 is a schematic view of a transverse strut configuration
FIG. 7 is a partial outline view of a butt-joint region of a laminated slab according to the present invention
FIG. 8 is a schematic diagram of post-embedding of a filler in a preform
FIG. 9 is a vertical cross-sectional view of the packing
FIG. 10 is a plan view of the packing
In the figure: 1. the prefabricated member comprises a prefabricated member, 2 parts of a laminated layer, 3 parts of a base plate, 4 parts of base plate reinforcing steel bars, 5 parts of a filling body, 6 parts of longitudinal solid ribs, 7 parts of transverse solid ribs, 8 parts of a reinforcing steel bar truss, 9 parts of upper chord reinforcing steel bars, 10 parts of lower chord reinforcing steel bars, 11 parts of web reinforcing steel bars, 12 parts of transverse supports, 13 parts of transverse reinforcing steel bars, 14 parts of supporting legs, 15 parts of splicing areas, 16 parts of supports, 17 parts of upper reinforcing steel bars, 18 parts of longitudinal reinforcing steel bars, 19 parts of transverse reinforcing steel bars, 20 parts of tie reinforcing steel bars, 21 parts of press bars, 22 parts of prestressed reinforcing steel bars, 23 parts of notches, 24 parts of chamfers and 25 parts.
(V) detailed description of the preferred embodiments
The invention is realized by the following modes:
in the embodiment shown in fig. 1-7, the hollow composite slab with the steel bar trusses is a reinforced concrete structure and comprises prefabricated members (1) at the bottom and a laminated layer (2) at the upper part, the prefabricated members are strip-shaped, the width of each prefabricated member is more than or equal to 1800mm and less than or equal to 3500mm, the length of each prefabricated member 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 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, more than 3 rows or 3 rows, 5 columns or more than 5 columns of filling bodies (5) made of light materials are arranged at the upper part of each prefabricated member, concrete longitudinal solid ribs (6) or transverse solid ribs (7) are arranged between adjacent filling bodies in the prefabricated member or at the edges of the filling bodies, the steel bar trusses (8) are embedded in at least two longitudinal solid ribs, each steel, the top height of the steel bar truss exceeds the top height of the filling body, transverse supports (12) are installed in at least 3 transverse solid ribs, each transverse support is composed of a transverse rib (13) and at least 3 supporting legs (14), the transverse ribs of each transverse support are located on the upper portions of upper chord ribs of the steel bar truss, the lower portions of the supporting legs are anchored in concrete of prefabricated parts, 2 or more than 2 prefabricated parts are connected in parallel, bottom plate steel bars between adjacent prefabricated parts are mutually overlapped in a splicing region (15), extending sections of the bottom plate steel bars of the prefabricated parts except the splicing region are all anchored into a beam or a wall support (16) of a periphery, upper steel bars (17) of the laminated slab are placed on the steel bar truss or the transverse supports, upper steel bars are bound, laminated concrete is poured, the minimum thickness of the concrete of a laminated layer on the upper portion of the filling body is larger than or equal to 40mm and smaller than or equal to 100mm, and the laminated slab.
In the embodiment shown in fig. 1, 3-5 and 7, the longitudinal steel bars (18) in the prefabricated bottom plate steel bars (4) are positioned at the upper parts of the transverse steel bars (19), the web bars (11) of the steel bar truss are of a broken line type, the diameter of the upper chord bars (9) is more than or equal to 8mm, the diameter of the lower chord bars (10) is more than or equal to that of the longitudinal steel bars, and the lower chord bars and the longitudinal steel bars are positioned at the same layer.
In the embodiment shown in fig. 1, 3 and 6, the legs (14) of the transverse support (12) are partially encrypted in the region of the two ends.
In the embodiment shown in fig. 3 and 4, the tie bars (20) are embedded in part of the longitudinal solid ribs (6) or the transverse solid ribs (7) of the prefabricated member (1), and the embedded depth and the exposed length of the tie bars in the concrete of the prefabricated member are both more than or equal to 30 mm.
In the embodiment shown in fig. 1 and 7, when the laminated slab is a bidirectional slab, the width of a post-cast strip in a splicing region (15) of adjacent prefabricated components (1) is more than or equal to 100mm and less than or equal to 300mm, in the splicing region, transverse steel bars (19) between the adjacent prefabricated components bend upwards, and 2 press bars (21) are arranged at the bending positions of the transverse steel bars.
In the embodiment shown in fig. 3 and 4, all or part of the longitudinal reinforcements (18) of the prefabricated member (1) are high-strength prestressed reinforcements (22).
In the embodiments shown in fig. 1-4, 7 and 8, the filling body (5) is arranged at the rear, a notch (23) which is matched with the size and the shape of the filling body is reserved on the filling body (5) in the forming process of the prefabricated member (1), and the filling body is inserted into the notch after the prefabricated member is formed.
In the embodiment shown in fig. 1, 3, 4, 7-10, when the filling body (5) is pre-arranged, the main material is polyphenyl foam or rigid plastic, the peripheries of the upper surface and the lower surface of the filling body are provided with chamfers (24), the middle part of the filling body is provided with a vertical slurry leaking hole (25), the upper end of the slurry leaking hole is funnel-shaped with a large upper part and a small lower part, and the lower end of the slurry leaking hole is inverted funnel-shaped with a small upper part and a large lower part.
In the embodiment shown in fig. 1 to 7, a method for manufacturing a hollow composite slab with a steel bar truss comprises the following steps: the composite slab is of a reinforced concrete structure and comprises prefabricated components (1) at the bottom and a composite layer (2) at the upper part, the prefabricated components are in a long strip shape, the width of each prefabricated component is more than or equal to 1800mm and less than or equal to 3500mm, the length of each prefabricated component 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 component is more than or equal to 40mm and less than or equal to 65mm, bottom plate reinforcing steel bars (4) are arranged in the bottom plate in a bidirectional mode, 3 rows or more than 3 rows, 5 columns or more than 5 columns of light-weight filler bodies (5) are arranged at the upper part of each prefabricated component, concrete longitudinal solid ribs (6) or transverse solid ribs (7) are arranged between adjacent filler bodies in the prefabricated component or at the edge of the filler bodies, reinforced bar trusses (8) are embedded in at least two longitudinal solid ribs, each reinforced bar truss is composed of an upper chord, the method comprises the steps that transverse supports (12) are installed in at least 3 transverse solid ribs, each transverse support is composed of a transverse rib (13) and at least 3 supporting legs (14), the transverse ribs of the transverse supports are located on the upper portions of upper chord ribs of a steel bar truss, the lower portions of the supporting legs are anchored in concrete of prefabricated parts, 2 or more than 2 prefabricated parts are connected in parallel, bottom plate steel bars between adjacent prefabricated parts are mutually overlapped in a splicing region (15), extending sections of the bottom plate steel bars of the prefabricated parts except the splicing region are all anchored into a surrounding beam or wall support (16), upper steel bars (17) of a laminated slab are placed on the steel bar truss or the transverse supports, upper steel bars are bound, laminated layer concrete is poured, the minimum thickness of the concrete of a laminated layer on the upper portion of a filling body is larger than or equal to 40mm and smaller than or equal to 100mm, and the laminated slab is formed.
In the embodiment shown in fig. 1, 3-5 and 7, a method for manufacturing a hollow composite slab with a steel bar truss comprises the following steps: the longitudinal steel bars (18) in the prefabricated member bottom plate steel bars (4) are positioned at the upper parts of the transverse steel bars (19), the web bars (11) of the steel bar truss are of a broken line type, the diameter of the upper chord bars (9) is larger than or equal to 8mm, the diameter of the lower chord bars (10) is larger than or equal to that of the longitudinal steel bars, and the lower chord bars and the longitudinal steel bars are positioned on the same layer.
Claims (10)
1. A hollow composite slab with steel bar trusses is of a reinforced concrete structure and comprises prefabricated parts (1) at the bottom and a composite layer (2) at the upper part, and is characterized in that the prefabricated parts are long-strip-shaped, the width of each prefabricated part is more than or equal to 1800mm 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 concrete thickness of a bottom plate (3) of the 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, more than 3 lines or 3 lines, more than 5 lines or more than 5 lines of light material filling bodies (5) are arranged at the upper part of each prefabricated part, concrete longitudinal solid ribs (6) or transverse solid ribs (7) are arranged between adjacent filling bodies in the prefabricated parts or at the edges of the filling bodies, steel bar trusses (8) are embedded in at least two longitudinal solid ribs, each, the top height of the steel bar truss exceeds the top height of the filling body, transverse supports (12) are installed in at least 3 transverse solid ribs, each transverse support is composed of a transverse rib (13) and at least 3 supporting legs (14), the transverse ribs of each transverse support are located on the upper portions of upper chord ribs of the steel bar truss, the lower portions of the supporting legs are anchored in concrete of prefabricated parts, 2 or more than 2 prefabricated parts are connected in parallel, bottom plate steel bars between adjacent prefabricated parts are mutually overlapped in a splicing region (15), extending sections of the bottom plate steel bars of the prefabricated parts except the splicing region are all anchored into a beam or a wall support (16) of a periphery, upper steel bars (17) of the laminated slab are placed on the steel bar truss or the transverse supports, upper steel bars are bound, laminated concrete is poured, the minimum thickness of the concrete of a laminated layer on the upper portion of the filling body is larger than or equal to 40mm and smaller than or equal to 100mm, and the laminated slab.
2. The hollow composite slab with the steel bar truss as claimed in claim 1, wherein the longitudinal steel bars (18) in the bottom plate steel bars (4) of the prefabricated member are positioned at the upper parts of the transverse steel bars (19), the web bars (11) of the steel bar truss are of a broken line type, the diameter of the upper chord bars (9) is more than or equal to 8mm, the diameter of the lower chord bars (10) is more than or equal to the diameter of the longitudinal steel bars, and the lower chord bars and the longitudinal steel bars are positioned at the same layer.
3. A hollow composite slab with steel bar trusses as claimed in claim 1, wherein the legs (14) of the transversal support (12) are partially encrypted in the area of both ends.
4. A hollow composite slab with a steel bar truss as claimed in claim 1, wherein the tie bars (20) are embedded in part of the longitudinal solid ribs (6) or the transverse solid ribs (7) of the prefabricated member (1), and the embedded depth and the exposed length of the tie bars in the concrete of the prefabricated member are both more than or equal to 30 mm.
5. The hollow composite slab with the steel bar truss as claimed in claim 1, wherein when the composite slab is a bidirectional slab, the width of a post-cast strip of a splicing region (15) of adjacent prefabricated members (1) is greater than or equal to 100mm and less than or equal to 300mm, in the splicing region, transverse steel bars (19) between the adjacent prefabricated members bend upwards, and 2 press bars (21) are arranged at the bending positions of the transverse steel bars.
6. A hollow composite slab with steel bar trusses according to claim 1, wherein all or a part of the longitudinal steel bars (18) of the prefabricated member (1) are high-strength prestressed bars (22).
7. The hollow composite slab with the steel bar truss as claimed in claim 1, wherein the filling body (5) is arranged at the rear, a notch (23) matched with the filling body in size and shape is reserved on the filling body (5) in the forming process of the prefabricated member (1), and the filling body is embedded into the notch after the prefabricated member is formed.
8. The hollow composite slab with the steel bar truss as claimed in claim 1, wherein the filler (5) is pre-installed, the main material of the filler is polyphenyl foam or rigid plastic, the peripheries of the upper and lower surfaces of the filler are provided with chamfers (24), the middle part of the filler is provided with a vertical grout leakage hole (25), the upper end of the grout leakage hole is funnel-shaped with a large upper part and a small lower part, and the lower end of the grout leakage hole is inverted funnel-shaped with a small upper part and a large lower part.
9. The method for manufacturing the hollow composite slab with the steel bar trusses according to claim 1, wherein the composite slab is of a reinforced concrete structure and comprises a bottom prefabricated member (1) and an upper laminated layer (2), the prefabricated member is strip-shaped, the width of each prefabricated member is more than or equal to 1800mm and less than or equal to 3500mm, the length of each prefabricated member 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 is more than or equal to 40mm and less than or equal to 65mm, bottom plate steel bars (4) are bidirectionally configured in the bottom plate, more than 3 rows or 3 rows, 5 columns or more than 5 columns of filling bodies (5) made of light materials are arranged on the upper portion of each prefabricated member, longitudinal solid ribs (6) or transverse solid ribs (7) of concrete are arranged between adjacent filling bodies in the prefabricated member or on the edges of the filling bodies, steel bar trusses (8) are embedded in at least, Two lower chord reinforcements (10) and web reinforcements (11) at two sides, wherein the top height of a steel bar truss exceeds the top height of a filling body, at least 3 transverse solid ribs are provided with transverse supports (12), each transverse support comprises a transverse reinforcement (13) and at least 3 supporting legs (14), the transverse reinforcement of each transverse support is positioned at the upper part of the upper chord reinforcement of the steel bar truss, the lower parts of the supporting legs are anchored in concrete of prefabricated members, 2 or more than 2 prefabricated members are connected in parallel, bottom plate reinforcements between adjacent prefabricated members are mutually overlapped in a splicing region (15), the extending sections of the bottom plate reinforcements except the splicing region of the prefabricated members are all anchored in a beam or wall support (16) of a circumference, upper reinforcements (17) of a laminated slab are placed on the steel bar truss or the transverse supports, upper reinforcements are bound, laminated concrete is poured, the minimum concrete thickness of a laminated layer at the upper part of the filling body is more than or equal to 40mm and less than or equal to 100mm, forming a laminated slab.
10. The method for manufacturing the hollow composite slab with the steel bar truss as claimed in claim 1, wherein the longitudinal steel bars (18) in the bottom plate steel bars (4) of the prefabricated member are positioned at the upper parts of the transverse steel bars (19), the web bars (11) of the steel bar truss are of a broken line type, the diameter of the upper chord bars (9) is more than or equal to 8mm, the diameter of the lower chord bars (10) is more than or equal to that of the longitudinal steel bars, and the lower chord bars and the longitudinal steel bars are positioned at the same layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110317312.5A CN112878563A (en) | 2021-03-25 | 2021-03-25 | Hollow superimposed sheet with steel bar truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110317312.5A CN112878563A (en) | 2021-03-25 | 2021-03-25 | Hollow superimposed sheet with steel bar truss |
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| Publication Number | Publication Date |
|---|---|
| CN112878563A true CN112878563A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110317312.5A Pending CN112878563A (en) | 2021-03-25 | 2021-03-25 | Hollow superimposed sheet with steel bar truss |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575513A (en) * | 2022-03-14 | 2022-06-03 | 河南尚同建筑科技有限公司 | Processing technology of vacuum extrusion molding fiber cement composite floor slab |
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2021
- 2021-03-25 CN CN202110317312.5A patent/CN112878563A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575513A (en) * | 2022-03-14 | 2022-06-03 | 河南尚同建筑科技有限公司 | Processing technology of vacuum extrusion molding fiber cement composite floor slab |
| CN114575513B (en) * | 2022-03-14 | 2023-09-01 | 河南尚同建筑科技有限公司 | Processing technology of vacuum extrusion molding fiber cement composite floor slab |
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