CN212957170U - Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes - Google Patents

Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes Download PDF

Info

Publication number
CN212957170U
CN212957170U CN202021633324.6U CN202021633324U CN212957170U CN 212957170 U CN212957170 U CN 212957170U CN 202021633324 U CN202021633324 U CN 202021633324U CN 212957170 U CN212957170 U CN 212957170U
Authority
CN
China
Prior art keywords
steel bar
truss
bottom plate
concrete
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021633324.6U
Other languages
Chinese (zh)
Inventor
陈丰华
顾金水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Muka New Material Co ltd
Original Assignee
Zhejiang Muka New Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Muka New Material Co ltd filed Critical Zhejiang Muka New Material Co ltd
Priority to CN202021633324.6U priority Critical patent/CN212957170U/en
Application granted granted Critical
Publication of CN212957170U publication Critical patent/CN212957170U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a precast concrete bottom plate of integrated truss reinforcing bar and prestressing force wire net, including concrete bottom plate, the concrete bottom plate middle level is equipped with the pretension wire net, concrete bottom plate upper end is equipped with the steel bar truss that the multiunit is horizontal equidistance and distributes, steel bar truss upper end and lower extreme are equipped with last chord steel bar and last chord steel bar respectively, the concrete bottom plate is buried to last chord steel bar. The utility model relates to a concrete bottom plate, in particular to precast concrete bottom plate of integrated truss reinforcing bar and prestressing force wire net belongs to building trade technical field. The utility model discloses technical scheme is except having solved the problem that current concrete coincide floor, steel bar truss building carrier plate and prestressed steel pipe truss coincide floor exist, because the utility model discloses the existence of the horizontal erect reinforcing bar of well horizontal plate bottom structure reinforcing bar and steel bar truss upper chord position for the prefabricated plate presents two-way atress characteristics, will have bigger transverse width than current steel bar truss building carrier plate.

Description

Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes
Technical Field
The utility model relates to a concrete bottom plate, in particular to precast concrete bottom plate of integrated truss reinforcing bar and prestressing force wire net belongs to building trade technical field.
Background
Precast fiber concrete panel: the building slab is a building product which is between gypsum board and stone and can be freely cut, drilled and carved, and is a building material widely used in building industry because the building slab is superior to the gypsum board and wood board in fire-proof, water-proof, corrosion-proof, insect-proof and sound-proof properties and is far lower than the stone, and the crack resistance of the cement slab can be enhanced by adding glass fiber in the production process of the cement slab, so that the precast fiber concrete slab is formed.
Prefabricating a composite steel wire mesh concrete slab: the steel wire mesh is pre-embedded in the production process of prefabricating the common concrete slab, so that the steel wire mesh and the concrete are stressed together to enhance the bending resistance and the crack resistance of the concrete slab, and the prefabricated composite steel wire mesh concrete slab is formed.
Steel bar truss: the triangular plane or space truss is formed by welding an upper chord steel bar, a lower chord steel bar and a web member steel bar.
The composite floor slab is a prefabricated product which is most widely applied in the current assembled integral concrete structure, and the common prefabricated products are as follows: 1. concrete composite floor slab; 2. a steel bar truss floor support plate; 3. superposing the prestressed steel pipe trusses on a floor slab;
concrete composite floor slab: the assembled integral floor slab is formed by overlapping precast slabs and cast-in-situ reinforced concrete layers. The composite floor slab has good integrity, the upper surface and the lower surface of the slab are smooth, the decoration of a finish coat is convenient, the composite floor slab is suitable for high-rise buildings and large-bay buildings with higher requirements on the integral rigidity, the prefabricated part is called as a prefabricated bottom plate, the cast-in-place part is called as a cast-in-place composite layer, but the existing concrete composite floor slab has the following defects:
1. in order to meet the requirement of building safety, embedded steel bars in the existing precast concrete composite floor slab usually need to extend out of the edges of the precast slab, so that the production efficiency of a factory is low, and a mold is wasted; meanwhile, the field installation is also very inconvenient.
2. The pre-embedded truss steel bars in the existing precast concrete composite floor slab usually do not participate in structural stress, but only play a role in enhancing the engagement force between the precast slabs and the cast-in-place composite layer concrete, so that the space between the steel bar trusses is large, the contribution to the bending rigidity of the slab is very limited, and the slab bottom needs a steel pipe scaffold for supporting during site construction.
3. The prefabricated bottom plate is thick and usually occupies more than 1/3 of the total thickness of the floor slab, and the cast-in-place superposed layer is thin under the limit of certain total plate thickness, so that the floor slab is weak in integrity, and pipelines are difficult to bury in the cast-in-place superposed layer.
4. The concatenation between two boards of current precast concrete coincide floor has two kinds of modes: firstly, the disconnect-type, there is the distance about one section 300mm between two boards promptly, call as the post-cast strip, the template needs to be established at the post-cast strip in the scene, ligature bar concreting, consequently, the work procedure is loaded down with trivial details, the cost is higher, secondly, close formula of piecing together, closely the amalgamation is in the same place between two boards promptly (the reinforcing bar of splice joint both sides board side also does not stretch out the flange this moment), then pour cast-in-place superimposed layer at the face, because the existence of splice joint, prefabricated bottom plate thickness is great in addition, make the floor actual thickness of plate seam department have the weakening of great degree, the intensity and the rigidity of board have seriously influenced, the floor splits in plate seam position very easily, influence building normal use.
5. In the prior art, the prefabricated bottom plate is made of common concrete and is relatively thin, so that the prefabricated bottom plate is easy to crack in the production and construction processes.
6. The thickness of the bottom plate of the precast concrete composite floor slab is about more than 60mm, so the weight is large, and the transport and the hoisting are not facilitated.
7. The stress reinforcing steel bars in two directions are pre-buried in the prefabricated bottom plate in the prior art, when a close splicing technology is adopted, a large amount of lap joint reinforcing steel bars need to be arranged at splicing positions, the using amount of the reinforcing steel bars is large, and the material waste is large.
8. In the prior art, the components are not produced according to the modulus, and each bottom plate component is produced on a single mold table, so that the standardization degree of the components is low, the production efficiency is low, and the labor cost is high.
Steel bar truss floor support plate: the galvanized steel plate, the steel wire mesh die or the calcium silicate plate or other industrial plates are used as a bottom plate, the integrated steel bar truss is used as a framework, the on-site die-free and few steel bar binding procedures are realized, and the existing steel bar truss floor bearing plate has the following defects:
1. the bottom plate and the steel bar trusses are only connected through welding or screws, integrity is poor, the bottom plate is only used as a bottom die and does not provide rigidity, and therefore, although the space between the steel bar trusses of the plate is small, the plate bottom still needs a steel pipe scaffold for supporting when a space with a slightly large span (the span exceeds 2.5m) is used for construction.
2. The galvanized steel sheet influences the building beauty, if the galvanized steel sheet is not dismantled, a decoration ceiling needs to be made for a room, if the galvanized steel sheet is dismantled, a construction process is added, and the cost is correspondingly increased.
3. The galvanized steel sheet and the truss steel bars are welded, so that a galvanized layer of the galvanized steel sheet is easily damaged at welding spots, and the galvanized steel sheet is easily rusted.
4. The bottom plate is only provided with stressed steel bars in one direction, namely a steel bar truss, the rigidity and the strength are weak due to no steel bar in the other direction, the width of the plate is limited, the plate width is generally 600mm, the maximum width is not more than 900mm, and the number of the plates is large when the plate is used.
5. Adopt the steel wire net mould as the steel bar truss floor bearing plate of bottom plate, the steel wire net passes through the ligature or welds on steel bar truss in the manufacturing process, and the net mould is not taut, and the atress is in lax state earlier stage, can't be to steel wire net accurate positioning, also can't effectively control board bottom concrete initial stage fracture.
6. The steel bar truss stretches out the board end, can shelve with the support on, but actually only be suitable for on the steel construction roof beam, to concrete structure roof beam, owing to there is the influence of stirrup and vertical muscle on the roof beam, in steel bar truss can't stretch into the support, the steel bar truss stretches out the characteristic of board end and has reduced the efficiency of production and construction on the contrary.
Prestressed steel pipe truss coincide floor: the prestressed steel strand is used for replacing stressed steel bars on the basis of the prior art I to improve the crack resistance of the thin plate, the upper chord of the truss steel bar is replaced by a steel pipe, and high-strength mortar is filled in the steel pipe to improve the rigidity of the floor slab, and the existing prestressed steel pipe truss composite floor slab has the following defects:
1. the bottom plate is too thin, and the fireproof time of the prestressed steel strand does not meet the requirement.
2. Prestressed steel strands and steel bar trusses are arranged in one direction only in the plate, the rigidity and the strength of the plate in the other direction are weak, and the width of the plate is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a precast concrete bottom plate of integrated truss reinforcing bar and prestressing force wire net to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the precast concrete bottom plate integrating the truss steel bars and the prestressed steel wire meshes comprises a concrete bottom plate, wherein a pretension steel wire mesh is arranged in the middle layer of the concrete bottom plate, a plurality of groups of steel bar trusses distributed at equal intervals in the transverse direction are arranged at the upper end of the concrete bottom plate, an upper chord steel bar and a lower chord steel bar are respectively arranged at the upper end and the lower end of each steel bar truss, the lower chord steel bar is embedded into the concrete bottom plate, the upper end and the lower end of the steel bar truss are respectively and fixedly provided with a plurality of groups of transverse erection steel bars and transverse structure bottom steel bars which are vertical to the extension direction of the steel bar truss, thereby effectively increasing the rigidity of the slab in the other direction, preventing the precast slab from cracking and damaging in the processes of production, transportation and installation, the prefabricated slab can improve the manufacturing width of the prefabricated slab, reduce the number of the slabs and improve the field installation efficiency, the on-site post-cast concrete superposed layer is poured at the upper end of the concrete bottom plate, and the upper end surface of the on-site post-cast concrete superposed layer is 15mm higher than the transverse erection steel bars.
As an optimal technical scheme of the utility model, the thickness of concrete bottom plate equals 15mm and adds the chord steel diameter down and adds 5mm, and concrete bottom plate thickness is not more than 1/4 of floor gross thickness.
As an optimal technical scheme of the utility model, at the bottom of steel bar truss, the horizontal structure muscle and the horizontal edge that erects the reinforcing bar and all do not extend concrete floor, to concrete structure roof beam, steel bar truss can not take place to interfere with stirrup on the roof beam and indulge the muscle, is the steel construction roof beam to the support, and prefabricated bottom plate still can directly shelve on the roof beam. The feature that the steel bar truss does not extend out of the plate end improves the efficiency of production and construction.
As a preferred technical scheme of the utility model, concrete bottom plate edge top is equipped with the flange chamfer for wear the protective layer at the concatenation position of the horizontal atress reinforcing bar in lower floor after providing the scene, the chamfer is not established to the lower limb.
As a preferred technical scheme of the utility model, concrete bottom plate is equipped with multiunit, every group concrete bottom plate in bank concatenation setting, and the fixed sticky tape that bonds between the concatenation gap, and sticky tape bonds two between the terminal surface under the concrete bottom plate.
As an optimal technical scheme of the utility model, concatenation gap width more than or equal to 10mm, and less than or equal to 50 mm.
As an optimal technical scheme of the utility model, the last chord diameter of steel bar diameter more than or equal to 10mm of steel bar truss top, steel bar truss below lower chord diameter of steel bar diameter more than or equal to 8mm, the diagonal member bar diameter more than or equal to 6mm that the steel bar truss both sides were equipped with, bar diameter more than or equal to 6mm at the bottom of the horizontal structure, transversely erect steel bar diameter more than or equal to 8mm, every group the steel bar truss interval less than or equal to 400 mm.
As a preferred technical scheme of the utility model, wear two-layer horizontal atress reinforcing bar after still including the multiunit scene, wear two-layer horizontal atress reinforcing bar behind the scene and wear the horizontal atress reinforcing bar of lower floor to constitute by wearing the horizontal atress reinforcing bar of upper strata behind the scene and the scene, wear the horizontal atress reinforcing bar of upper strata behind the scene and transversely erect the reinforcing bar parallel, and be in same height, wear the horizontal atress reinforcing bar of upper strata behind the scene and construct the end muscle parallel with horizontal, and lay in the concrete bottom plate upper end.
As an optimal technical scheme of the utility model, every distance between the muscle is 1m at the bottom of the horizontal structure, every distance between the horizontal upright reinforcing bar is 2 m.
Compared with the prior art, the beneficial effects of the utility model are that:
1. compared with the existing concrete composite floor slab, the utility model has the advantages that the reinforcing steel bars do not extend around the prefabricated bottom plate, thereby improving the production efficiency and saving the mould; meanwhile, the field installation is very convenient;
2. compared with the existing concrete composite floor slab, the utility model takes the mechanical action of the truss reinforcing steel bars into consideration during the design, not only saves the reinforcing steel bars, but also greatly improves the bending rigidity of the slab by encrypting the arrangement of the truss reinforcing steel bars, can realize no support or little support during the site construction within the common span (4m) of the common house, and saves manpower and material resources;
3. compared with the existing concrete composite floor slab, the utility model has the advantages that the prefabricated bottom plate is thinner, the thickness of the prefabricated bottom plate is less than 1/4 of the total thickness of the floor slab, and the cast-in-situ composite layer is thicker, so that pipelines can be conveniently embedded in the cast-in-situ composite layer, and meanwhile, the integrity of the floor slab is also enhanced;
4. compared with the existing concrete composite floor slab, the utility model discloses in adopt close piece together formula to connect between two boards, because prefabricated bottom plate is very thin, almost only be concrete protection layer thickness, therefore the actual effective thickness of slab of board seam department is very close with cast-in-place floor slab, the intensity and the rigidity of board do not weaken, because there is no construction of support simultaneously, therefore floor dead load has been born in advance by the reinforcing bar in the prefabricated bottom plate, the stress of later stage board seam position department is very little, its numerical value is less than whole cast-in-place floor slab even, the floor slab is difficult to split in board seam position;
5. compared with the existing concrete laminated floor slab, the utility model adopts the precast fiber concrete or the prestressed steel wire mesh concrete as the bottom slab, so that the precast slab still has higher anti-cracking performance under the condition of thinner precast slab;
6. compared with the existing concrete composite floor slab, the thickness of the bottom plate of the precast concrete composite floor slab designed by the utility model is usually not more than 40mm, so the weight of the member is smaller, and the transportation and the hoisting are facilitated;
7. compared with the existing concrete composite floor slab, the utility model only pre-embeds the reinforcing steel bars in one direction of the prefabricated bottom plate, namely the lower chord reinforcing steel bar of the reinforcing steel bar truss, and the reinforcing steel bars in the other direction are placed in the field for full length, so that the problem of overlapping reinforcing steel bars is avoided, and the reinforcing steel bars are not wasted;
8. compared with the existing concrete composite floor slab, the utility model is designed according to modulus, long-mold-table production is realized, the production efficiency is high, and the labor force is saved;
9. compared with the existing steel bar truss floor support plate, the concrete bottom plate is adopted in the building support plate, the truss lower chord steel bars are embedded into the concrete bottom plate, and the steel bar truss and the concrete bottom plate play a role in a synergistic mode, so that the rigidity is larger, the support-free span can be larger compared with the existing steel bar truss floor support plate, the truss steel bar interval can be larger, and materials are saved;
10. compared with the existing steel bar truss floor support plate, the concrete bottom plate adopted by the utility model does not affect the building beauty, and the plate bottom is free from a plastering process, thereby saving the cost;
11. compared with the prior steel bar truss floor support plate, the concrete bottom plate adopted by the utility model is used as the protective layer of the steel bar to avoid the steel bar from rusting;
12. compared with the existing prestressed steel pipe truss laminated slab, the prefabricated bottom plate of the utility model is also very thin, but the fireproof requirement is easily met because the common steel bar is adopted;
13. compared with the prior steel bar truss floor bearing plate, the utility model discloses steel wire net adopts the pretension technique at the bottom of the plate in process of production, makes the steel wire straighten and level, and on the one hand, the steel wire net has supported upper portion steel bar truss, and can realize that the steel wire net pinpoints and remove the concrete cushion from, remove the ligature or welding work with steel bar truss from, improve production efficiency, and on the other hand the steel wire net can play a role in bottom plate atress earlier stage, and the suppression bottom of the plate crack develops, and the utility model discloses a prestressing force steel wire net only provides above-mentioned effect in the production stage, does not participate in the structure atress in the use stage;
14. compared with the existing steel bar truss floor bearing plate, the steel bar truss does not extend out of the plate end, the steel bar truss can not interfere with stirrups and longitudinal bars on the beam for a concrete structural beam, and the prefabricated bottom plate can still be directly placed on the beam for the support is a steel structural beam; the characteristic that the steel bar truss does not extend out of the plate end improves the efficiency of production and construction;
15. compare with current steel bar truss floor carrier plate and prestressing steel pipe truss coincide floor, the utility model discloses except arranging the atress reinforcing bar in a board direction, the inherent perpendicular steel bar truss length direction of bottom plate sets up a constructional steel bar at certain distance (about 1m) every, set up a set of frame at steel bar truss last quarter as required every certain distance (about 2m), thereby effectively increase the rigidity of board in another direction, prevent that the prefabricated plate from producing, the transportation, the fracture damage in the installation, can improve the preparation width of prefabricated plate, reduce the quantity of board, improve the on-the-spot installation effectiveness.
The utility model discloses technical scheme is except having solved the problem that current concrete coincide floor, steel bar truss building carrier plate and prestressed steel pipe truss coincide floor exist, because the utility model discloses the existence of the horizontal erect reinforcing bar of well horizontal plate bottom structure reinforcing bar and steel bar truss upper chord position for the prefabricated plate presents two-way atress characteristics, will have bigger transverse width than current steel bar truss building carrier plate.
Because the utility model discloses concrete bottom plate four sides can not go out the muscle, consequently production efficiency is higher.
The utility model discloses a pretension wire net, it is stronger than ordinary not stretch-draw net crack resistance, the preparation precision is controlled more easily, does not have welding, does not have the ligature process for the production efficiency of mill is higher.
The utility model discloses the prefabricated plate is thinner for cast-in-place layer thickens relatively, and the space is great under the truss, wears to establish the pipeline easily.
Drawings
FIG. 1 is a view of the prefabricated part of the present invention;
fig. 2 is a general diagram of a precast concrete floor slab integrating truss reinforcing steel bars and prestressed wire meshes of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a schematic structural view of the middle plate edge chamfer of the present invention;
FIG. 5 is a schematic structural view of the steel bar with two layers of transverse stress in the rear of the field;
FIG. 6 is a schematic structural view of the concrete bottom plate of the present invention for preventing slurry leakage;
FIG. 7 is a schematic structural view of concrete placement in the long-line platform manufacturing process of the present invention;
fig. 8 is a schematic structural view of the block cutting process in the long line platform manufacturing process of the present invention.
In the figure: 1. a concrete floor; 11. chamfering the plate edges; 2. pre-tensioning the steel wire mesh; 3. a steel bar truss; 4. Transversely constructing bottom ribs; 5. transversely erecting steel bars; 6. two layers of transverse stressed steel bars are penetrated behind the site; 7. casting a concrete superposed layer on site; 8. an adhesive tape.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-8, the utility model provides a precast concrete floor slab integrating truss reinforcing steel bars and prestressed steel wire meshes, which comprises a concrete floor slab 1, a pretension steel wire mesh 2 is arranged in the middle layer of the concrete floor slab 1, a plurality of groups of reinforcing steel bar trusses 3 distributed in a transverse and equidistant manner are arranged at the upper end of the concrete floor slab 1, upper chord reinforcing steel bars and lower chord reinforcing steel bars are respectively arranged at the upper end and the lower end of the reinforcing steel bar trusses 3, the lower chord reinforcing steel bars are embedded in the concrete floor slab 1, the concrete floor slab 1 is made of high-strength concrete or anti-cracking concrete mixed with fibers, the thickness of the concrete floor slab 1 is equal to 15mm plus the diameter of the lower chord reinforcing steel bars plus 5mm, the thickness of the concrete floor slab 1 is not more than 1/4 of the total thickness of the floor slab, a plurality of transverse erection reinforcing steel bars 5 and transverse construction bottom reinforcing steel bars, concrete floor 1 upper end is pour and is had on-the-spot post-cast concrete superimposed layer 7, and on-the-spot post-cast concrete superimposed layer 7 up end is higher than horizontal erection reinforcing bar 5 about 15mm, still including wearing two-layer horizontal atress reinforcing bar 6 behind the multiunit scene, wear two-layer horizontal atress reinforcing bar 6 behind the scene and wear the horizontal atress reinforcing bar of lower floor to constitute after wearing upper strata horizontal atress reinforcing bar and the scene after by the scene, wear upper strata horizontal atress reinforcing bar and horizontal erection reinforcing bar 5 parallel behind the scene, and be in same height, wear upper strata horizontal atress reinforcing bar and horizontal structure bottom muscle 4 parallel behind the scene, and lay in concrete floor 1 upper end, reinforcing bar and wire net fall into the structure from top to bottom and do in proper order: the steel bar truss structure comprises an upper layer of transverse stressed steel bars, prefabricated transverse erection steel bars (at the same height), steel bar truss upper chord steel bars, a lower layer of transverse stressed steel bars, steel bar truss lower chord steel bars, transverse structure bottom steel bars 4 and a pre-tensioned steel wire mesh, wherein the steel bar truss at the bottom of a plate is not provided with a cushion block for bearing, the steel wire mesh is adopted to be pre-tensioned and tightened, the upper steel bar truss is supported, prefabricated plates are continuously produced and manufactured by a long wire platform, and the prefabricated plates are cut off according to requirements after pouring and are stacked in a classified mode.
Wherein, steel bar truss 3, horizontal structure end muscle 4 and horizontal erection reinforcing bar 5 all do not extend the edge of concrete bottom plate 1, only at the pre-buried reinforcing bar of a direction of prefabricated bottom plate, steel bar truss's last quarter reinforcing bar promptly, the reinforcing bar of another direction is put at the scene expert length, place with steel bar truss 3 is perpendicular, to concrete structure roof beam, steel bar truss 3 can not take place to interfere with stirrup and the vertical muscle on the roof beam, be the steel structure roof beam to the support, prefabricated bottom plate (concrete bottom plate 1) still can directly be shelved on the roof beam, the efficiency of production and construction has been improved to the characteristic that this kind of steel bar truss does not stretch out the board end.
The concrete bottom plate comprises a concrete bottom plate 1, a plate edge chamfer 11 is arranged above the edge of the concrete bottom plate 1 and used for providing a protective layer of a splicing part for penetrating a lower layer of transverse stressed steel bar on site, the chamfer 11 is not arranged at the lower edge, the concrete bottom plate 1 is provided with a plurality of groups, each group of concrete bottom plates 1 are spliced in rows, two prefabricated plates are connected in a close splicing mode, the width of a splicing gap is larger than or equal to 10mm and smaller than or equal to 50mm, an adhesive tape 8 is fixedly bonded between the splicing gaps, the adhesive tape 8 is bonded between the lower end faces of the two concrete bottom plates 1, a single-sided adhesive tape is bonded at the splicing gap of the plate bottoms during site construction, concrete is cast on site on the plate surface, cement slurry automatically flows into the plate gaps, the adhesive tape of the plate bottoms is torn after the concrete is solidified.
The diameter of the steel bar and the distance between the steel bar trusses are determined by calculation according to actual conditions, the diameter of the upper chord steel bar above the steel bar truss 3 is larger than or equal to 10mm, the diameter of the lower chord steel bar below the steel bar truss 3 is larger than or equal to 8mm, the diameter of the diagonal web member steel bar arranged on two sides of the steel bar truss 3 is larger than or equal to 6mm, the diameter of the transverse structure bottom rib 4 is larger than or equal to 6mm, the diameter of the transverse erection steel bar 5 is larger than or equal to 8mm, and the distance between every two steel bar; when the plate span is less than 4m, the prefabricated bottom plate is constructed according to a single-span unidirectional plate, when the plate span exceeds 4m, supports are arranged at intervals of 2m in the span, and the prefabricated plate is calculated according to a continuous unidirectional plate.
The transverse construction steel bars 4 are arranged in the bottom plate at intervals of a certain distance (about 1m) in the length direction of the vertical steel bar truss, and the transverse erection steel bars 5 are arranged on the steel bar truss 3 at intervals of a certain distance (about 2m) according to requirements, so that the rigidity of the plate in the other direction is effectively increased, the prefabricated plate is prevented from being cracked and damaged in the production, transportation and installation processes, the manufacturing width of the prefabricated plate can be increased, the number of the plates is reduced, and the field installation efficiency is improved.
Wherein, the steel bar truss 3 can also be replaced by a finished steel bar cage in other forms; the precast concrete floor 1 can be replaced by other ultrahigh-performance materials, such as ultrahigh-strength concrete, high-ductility concrete, heat-insulating concrete, sound-insulating concrete and the like; the pre-tensioned steel wire mesh 2 can be replaced by other materials, such as glass fiber mesh cloth and the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The precast concrete bottom plate integrating the truss steel bars and the prestressed steel wire meshes comprises a concrete bottom plate (1), it is characterized in that a pretension steel wire mesh (2) is arranged on the middle layer of the concrete bottom plate (1), a plurality of groups of steel bar trusses (3) which are distributed in a transverse and equidistant way are arranged at the upper end of the concrete bottom plate (1), the upper end and the lower end of the steel bar truss (3) are respectively provided with an upper chord steel bar and a lower chord steel bar, the lower chord steel bar is embedded into the concrete bottom plate (1), the upper end and the lower end of the steel bar truss (3) are respectively fixedly provided with a plurality of groups of transverse erection steel bars (5) and transverse structure bottom steel bars (4) which are vertical to the extension direction of the steel bar truss (3), the upper end of the concrete bottom plate (1) is poured with a post-cast-in-place concrete superposed layer (7), and the upper end surface of the post-cast concrete laminated layer (7) on site is 15mm higher than the transverse erection steel bar (5).
2. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: the thickness of the concrete bottom plate (1) is equal to 15mm plus the diameter of the lower chord steel bar plus 5mm, and the thickness of the concrete bottom plate (1) is not more than 1/4 of the total thickness of the floor slab.
3. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: the steel bar truss (3), the transverse structure bottom bar (4) and the transverse erection steel bar (5) do not extend out of the edge of the concrete bottom plate (1).
4. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: and a plate edge chamfer (11) is arranged above the edge of the concrete bottom plate (1).
5. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: concrete floor (1) is equipped with the multiunit, every group concrete floor (1) concatenation setting in bank, and fixed bonding has sticky tape (8) between the concatenation gap, and sticky tape (8) bond two between the terminal surface under concrete floor (1).
6. The precast concrete floor slab integrating truss reinforcement and prestressed wire mesh according to claim 5, wherein: the width of the splicing gap is more than or equal to 10mm, and less than or equal to 50 mm.
7. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: the diameter of an upper chord steel bar above the steel bar truss (3) is more than or equal to 10mm, the diameter of a lower chord steel bar below the steel bar truss (3) is more than or equal to 8mm, the diameter of an oblique web member steel bar arranged on two sides of the steel bar truss (3) is more than or equal to 6mm, the diameter of a transverse construction bottom rib (4) is more than or equal to 6mm, the diameter of a transverse erection steel bar (5) is more than or equal to 8mm, and the distance between every two steel bar trusses (3) is less than or equal to 400 mm.
8. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: still wear two-layer horizontal atress reinforcing bar (6) behind the multiunit scene, wear two-layer horizontal atress reinforcing bar (6) behind the scene by wear the horizontal atress reinforcing bar of upper strata behind the scene and wear the horizontal atress reinforcing bar of lower floor behind the scene and constitute, wear the horizontal atress reinforcing bar of upper strata behind the scene and transversely erect reinforcing bar (5) parallel, and be in same height, wear the horizontal atress reinforcing bar of upper strata behind the scene and transversely construct end muscle (4) parallel, and lay in concrete bottom plate (1) upper end.
9. The precast concrete floor slab integrating truss rebars and prestressed wire nets according to claim 1, wherein: the distance between every horizontal structure base muscle (4) is 1m, and the distance between every horizontal erect reinforcing bar (5) is 2 m.
CN202021633324.6U 2020-08-08 2020-08-08 Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes Active CN212957170U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021633324.6U CN212957170U (en) 2020-08-08 2020-08-08 Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021633324.6U CN212957170U (en) 2020-08-08 2020-08-08 Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes

Publications (1)

Publication Number Publication Date
CN212957170U true CN212957170U (en) 2021-04-13

Family

ID=75349147

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021633324.6U Active CN212957170U (en) 2020-08-08 2020-08-08 Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes

Country Status (1)

Country Link
CN (1) CN212957170U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112895116A (en) * 2021-01-19 2021-06-04 陕西中天建筑工业有限公司 Auxiliary equipment for prefabricated plate material distribution and processing technology thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112895116A (en) * 2021-01-19 2021-06-04 陕西中天建筑工业有限公司 Auxiliary equipment for prefabricated plate material distribution and processing technology thereof
CN112895116B (en) * 2021-01-19 2022-03-11 陕西中天建筑工业有限公司 Auxiliary equipment for prefabricated plate material distribution and processing technology thereof

Similar Documents

Publication Publication Date Title
CN100416010C (en) Joint construction method of prefabricated composite bearing wall structure
CN106703269A (en) Prestressed concrete superimposed sheet with steel trusses and manufacturing method
CN106401036B (en) A kind of assembled steel frame prefabricated concrete floor structure
CN107542196A (en) Prestressed concrete bidirectional laminated slab and preparation method
US20100024332A1 (en) Structural element and methods of use thereof
CN110206143B (en) Construction method of post-tensioning prestressed assembly concrete frame structure
CN210713255U (en) Assembled prestress superposed beam-column joint for building
CN213806067U (en) Steel bar truss prestressed concrete superimposed sheet
CN207878747U (en) A kind of laminated floor slab prefabricated board
CN212957170U (en) Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes
CN101787760A (en) Steel bar concrete precast floor slab
CN201087489Y (en) Prefabricated floor
CN111851827A (en) Assembly type prefabricated steel bar truss disassembly-free template system and manufacturing method thereof
CN214884744U (en) Half prefabricated formwork removal-free steel bar truss floor based on uhpc
CN108951982A (en) Assembly concrete superposed floor plate and its construction method based on cement fibrolite plate composite reinforcing steel bar skeleton
CN108301545A (en) A kind of big module overlapping contignation of the assembled with space truss temporary support
CN202248526U (en) Precast reinforced concrete structural beam for assembled house building
CN111535488A (en) Prefabricated steel bar truss of assembled exempts from to tear open building carrier plate and cast-in-place and exempt from to strut truss floor
CN111705987A (en) Large-span prefabricated ribbed prestressed hollow bidirectional laminated slab
CN208039577U (en) Half prefabricated prestressed concrete floor slab of figure of eight steel bar girder
CN114059699A (en) Precast concrete bottom plate integrated with truss steel bars and prestressed steel wire meshes
CN110005109A (en) A kind of open flume type prestressed concrete overlapped slab
CN206722216U (en) A kind of prefabricated girder of laminated floor slab
CN112282164B (en) Light composite floor slab structure and construction method thereof
CN212957169U (en) Prefabricated steel bar truss of assembled exempts from to tear open building carrier plate and cast-in-place and exempt from to strut truss floor

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant