CN211523705U - Prefabricated prestressed ribbed bottom plate and concrete composite slab - Google Patents
Prefabricated prestressed ribbed bottom plate and concrete composite slab Download PDFInfo
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- CN211523705U CN211523705U CN201921312054.6U CN201921312054U CN211523705U CN 211523705 U CN211523705 U CN 211523705U CN 201921312054 U CN201921312054 U CN 201921312054U CN 211523705 U CN211523705 U CN 211523705U
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Abstract
The utility model belongs to the technical field of building structure, in particular to a prefabricated prestressed ribbed bottom plate and a concrete laminated slab, which are characterized in that the prefabricated prestressed ribbed bottom plate is provided with a rectangular bottom plate and is internally provided with prestressed steel bars, and the prestressed steel bars need to use high-strength materials, so that the steel bar consumption and the section size of the prefabricated prestressed ribbed bottom plate can be reduced, and further steel and concrete can be saved; in addition, the prestressed reinforcement can effectively control the inverted arch of the prefabricated prestressed ribbed bottom plate, and the distributed reinforcement is bound under the prestressed reinforcement, so that the size of the prefabricated prestressed ribbed bottom plate is the same as that of the prefabricated prestressed ribbed bottom plate, the distributed reinforcement does not need to be paid out to the prefabricated prestressed ribbed bottom plate, the consumption of the distributed reinforcement can be reduced, and the manufacturing of a mold for the prefabricated prestressed ribbed bottom plate is facilitated. Therefore, the prefabricated prestressed ribbed bottom plate has the advantages of better integrity, crack resistance and bearing capacity, large span application range, good economy and the like.
Description
Technical Field
The utility model belongs to the technical field of building structure, especially, relate to a prefabricated prestressing force ribbed bottom plate and concrete superimposed sheet.
Background
The civil fabricated building floor system mostly adopts the prefabricated truss steel bar composite slab, and when the span of the floor slab is larger than 6m, the prefabricated truss steel bar composite slab faces more problems in the aspects of component manufacturing, construction and installation, post-cast composite layer and the like. Therefore, the prefabricated prestressed hollow slab is adopted in part of large-span floor system projects, but the problem of the connection safety of the hollow slab and the shear wall is not solved all the time, and particularly the economy of the hollow slab which needs a post-cast laminated layer is greatly reduced. Some projects adopt a prefabricated prestressed laminated slab with ribs, and the ribs of the slab are provided with a plurality of rectangular holes, so that the production efficiency is low, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prefabricated prestressing force ribbed bottom plate, it is lower to aim at solving the prefabricated prestressing force ribbed bottom plate production efficiency among the prior art, and the higher technical problem of manufacturing cost.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a prefabricated prestressed ribbed bottom plate, is including the bottom plate that is the cuboid, and locates the bottom plate top is followed the concrete rib that the length direction of bottom plate set up, the length of concrete rib with the length of bottom plate is the same, be equipped with a plurality of prestressed reinforcement that set up side by side that adopt pretension method stretch-draw, each in the bottom plate the prestressed reinforcement is followed bottom plate length direction sets up, each the equal ligature of prestressed reinforcement downside has a plurality of distribution reinforcement, and is a plurality of the distribution reinforcement is followed bottom plate width direction sets up and the interval sets up.
Furthermore, the concrete rib is close to one side of the bottom plate is provided with an installation through hole penetrating through the concrete rib, and the installation through hole is arranged along the width direction of the bottom plate.
Further, the quantity of installation through-hole is a plurality of, and is a plurality of installation through-hole even equidistant interval set up in on the concrete rib.
Further, be equipped with the bottom on the concrete rib and extend to hoist and mount piece in the bottom plate, the bottom of hoist and mount piece respectively with prestressing steel and distribution reinforcement fixed connection, just hoist and mount piece with the setting of installation through-hole dislocation.
Further, still be equipped with on the bottom plate and be located the prefabricated mounting of the bottom of bottom plate, prefabricated mounting respectively with prestressing steel and distribution reinforcement fixed connection, just prefabricated mounting with the installation through-hole dislocation set.
Further, the width of the concrete rib is 50mm to 400mm, and the height is 30mm to 500 mm.
Furthermore, the upper surface and the side surfaces of the bottom plate are rough surfaces.
The utility model has the advantages that: the utility model discloses a prefabricated prestressing force ribbed bottom plate, through setting up the bottom plate of cuboid, and be equipped with the prestressed reinforcement in the bottom plate, this prestressed reinforcement adopts the pretension method to carry out pretension, specifically, the pulling force is the pulling force of 0.5 ~ 1 times reinforcing bar ultimate strength standard value size, set up the distribution reinforcing bar of ligature in the prestressed reinforcement top again and pour concrete, put after the concrete strength of prefabricated prestressing force ribbed bottom plate reaches 0.7 ~ 1.0 times design strength and open, the opening of here is for cutting prestressed reinforcement and the work anchorage device of being connected, form prefabricated prestressing force ribbed bottom plate after the concrete strength reaches design strength, on the one hand, can form the prefabricated prestressing force ribbed bottom plate that is difficult for the fracture; on the other hand, because the prestressed reinforcement needs to use a high-strength material, the using amount of the reinforcement and the section size of the prefabricated prestressed ribbed bottom plate can be reduced, further steel and concrete are saved, the self weight of the structure is reduced, and the large-span and heavy-load structure has obvious effects; in addition, the prestressed reinforcement can effectively control the inverted arch of the prefabricated prestressed ribbed bottom plate. The distributed steel bars are directly bound below the prestressed steel bars, so that the size of the distributed steel bars is the same as that of the prefabricated prestressed ribbed bottom plate, the distributed steel bars do not need to be paid out from the prefabricated prestressed ribbed bottom plate, the consumption of the distributed steel bars can be further reduced, and the manufacture of a mold for prefabricating the prestressed ribbed bottom plate is facilitated. Therefore, the prefabricated prestressed ribbed bottom plate has the advantages of better integrity, crack resistance and bearing capacity, large span application range, good economy and the like.
The utility model also provides a concrete superimposed sheet, including a plurality of foretell prestressing force ribbed bottom plate and coincide concrete layer, prefabricated prestressing force ribbed bottom plate is including the bottom plate that is the cuboid, and locates the bottom plate top is followed the concrete rib that the length direction of bottom plate set up, adjacent many the concrete rib with prefabricated prestressing force ribbed bottom plate concatenation forms fills the chamber, seted up on the concrete rib along the installation through-hole that the width direction of bottom plate set up, fill the intracavity be equipped with the same longitudinal reinforcement of prefabricated prestressing force ribbed bottom plate length direction, and with prefabricated prestressing force ribbed bottom plate width direction is the same first horizontal reinforcing bar, coincide concrete layer locates prefabricated prestressing force ribbed bottom plate top and fill the intracavity.
Furthermore, a second transverse steel bar parallel to the first transverse steel bar is further arranged in the pouring cavity, and the second transverse steel bar penetrates through all the mounting through holes in the single row.
Further, the first transverse steel bar and the second transverse steel bar are arranged above the longitudinal steel bar.
The utility model discloses a concrete superimposed sheet is through using foretell prefabricated prestressing force ribbed bottom plate to set up first horizontal reinforcing bar and longitudinal reinforcement in filling the chamber, again with a plurality of prefabricated prestressing force ribbed bottom plates through pouring coincide concrete layer, make coincide concrete layer set up in prefabricated prestressing force ribbed bottom plate top and fill the intracavity, make to form concrete superimposed sheet with two adjacent prefabricated prestressing force ribbed bottom plate combinations. The concrete laminated slab has the advantages of good integrity, crack resistance and bearing capacity, large span application range, good economy and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a first schematic structural diagram of a prefabricated prestressed ribbed bottom plate according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram ii of a prefabricated prestressed ribbed bottom plate according to an embodiment of the present invention;
fig. 3 is a third schematic structural view of a prefabricated prestressed ribbed bottom plate according to an embodiment of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 1;
fig. 5 is a schematic structural view of a concrete composite slab provided by an embodiment of the present invention
Fig. 6 is a sectional view taken along line B-B of fig. 5.
Wherein, in the figures, the respective reference numerals:
10-a base plate; 11-prestressed reinforcement; 12-distributing reinforcing steel bars;
13-hoisting piece; 14, prefabricating a fixing piece; 20-concrete ribs;
21-mounting a through hole; 30-overlapping concrete layers; 40-filling the cavity;
41-longitudinal reinforcement; 42-a first transverse bar; 43-second transverse reinforcement.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-6 are exemplary and intended to be used to illustrate the invention, but should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1 to 4, an embodiment of the present invention provides a prefabricated prestressed ribbed bottom plate, including a bottom plate 10 in a rectangular parallelepiped shape, and a concrete rib 20 disposed on the top of the bottom plate 10 and disposed along the length direction of the bottom plate 10, the length of the concrete rib 20 is the same as that of the bottom plate 10, a plurality of prestressed reinforcements 11 disposed side by side and tensioned by a pretensioning method are disposed in the bottom plate 10, specifically, the pretensioning method is a method for improving the crack resistance of a reinforced concrete member and preventing the reinforced concrete member from cracking prematurely, and pre-stressing the reinforced concrete member during the prefabrication process of the concrete member to improve the performance of the member; each prestressed reinforcement 11 sets up along bottom plate 10 length direction, and each 11 downside of prestressed reinforcement all ligatures have a plurality of distribution reinforcing bars 12, specifically, and prestressed reinforcement 11 all ligatures with distribution reinforcing bar 12's coincident point, and a plurality of distribution reinforcing bars 12 set up along bottom plate 10 width direction interval.
The utility model discloses prefabricated prestressing force ribbed bottom plate, through the bottom plate 10 that sets up the cuboid, and be equipped with prestressed reinforcement 11 in the bottom plate 10, this prestressed reinforcement 11 adopts the pretension method to carry out pretension, specifically, the pulling force is the pulling force of reinforcing bar ultimate strength standard value size of 0.5 ~ 1 times, set up distribution reinforcement 12 and the concreting at prestressing steel 11 top again, wait to prefabricate prestressing force ribbed bottom plate's concrete strength and put and open after reaching 0.7 ~ 1.0 times design strength, put here and open for cutting prestressed reinforcement 11 and the work anchorage device of being connected, form prefabricated prestressing force ribbed bottom plate after the concrete strength reaches design strength, on the one hand, can form the prefabricated prestressing force ribbed bottom plate that is difficult for splitting; on the other hand, because the prestressed reinforcement 11 needs to use a high-strength material, the using amount of the reinforcement and the section size of the prefabricated prestressed ribbed bottom plate can be reduced, further steel and concrete are saved, the self weight of the structure is reduced, and the large-span and heavy-load structure has obvious effects; in addition, the prestressed reinforcement 11 can effectively control the inverted arch of the prefabricated prestressed ribbed bottom plate. Because the distributed steel bars 12 are directly bound below the prestressed steel bars 11, the size of the distributed steel bars is the same as that of the prefabricated prestressed ribbed bottom plate, the distributed steel bars 12 do not need to be paid out from the prefabricated prestressed ribbed bottom plate, the consumption of the distributed steel bars 12 can be further reduced, and the manufacturing of a mold for prefabricating the prestressed ribbed bottom plate is facilitated. Therefore, the prefabricated prestressed ribbed bottom plate has the advantages of better integrity, crack resistance and bearing capacity, large span application range, good economy and the like.
Specifically, the concrete grade is C30-C60, and the prestressed reinforcement 11 may be steel materials satisfying the strength and rigidity of the prestressed reinforcement 11, such as high-strength steel wires, steel strands, or prestressed threaded steel bars, which are not limited herein.
The distribution steel bars 12 are HRB400 grade steel bars or other types of steel bars meeting the specification, and are not limited herein.
Specifically, the number of prestressed reinforcement bars 11 and the number of distributed reinforcement bars 12 are related to the size of the pre-stressed ribbed floor required for actual production.
Specifically, the number of concrete ribs 20 is related to the size of the pre-stressed ribbed floor required for actual production, and the specific number of concrete ribs 20 on the pre-stressed ribbed floor is not limited herein.
Further, as shown in fig. 2 or 4, in the present embodiment, the concrete rib 20 has an installation through hole 21 penetrating the concrete rib 20 on a side close to the bottom plate 10, and the installation through hole 21 is provided along the width direction of the bottom plate 10. When the prefabricated prestressed ribbed bottom plate is applied to a multi-story building, the prefabricated prestressed ribbed bottom plate is stressed in a single direction, namely the installation through hole 21 can be applied to a water penetrating electric pipe; when the prefabricated prestressed ribbed bottom plate is applied to a high-rise building or a super high-rise building, a steel bar can penetrate through the installation through hole 21 and penetrates through at least two prefabricated prestressed ribbed bottom plates, so that the prefabricated prestressed ribbed bottom plates can be arranged to form a bidirectional stress member, and the use requirements of the high-rise building or the super high-rise building are met.
Specifically, when the prefabricated prestressed ribbed floor is applied to a multi-story building without the need for passing water pipes or the like, the installation through-holes 21 may not be formed, and it is determined whether the installation through-holes 21 are formed according to actual use requirements.
Further, as shown in fig. 2 or 4, in the present embodiment, the number of the installation through holes 21 is plural, and the plural installation through holes 21 are uniformly provided on the concrete rib 20 at equal intervals. Through setting up a plurality of installation through-holes 21, and the position correspondence of the installation through-hole 21 of a plurality of prefabricated prestressing force ribbed bottom plates is arranged into the multirow, and single reinforcing bar can pass and locate a plurality of installation through-holes 21 of one row, like this, can improve the efficiency of construction, sets up installation through-hole 21 on concrete rib 20 with even equidistant interval again for prefabricated prestressing force ribbed bottom plate atress is even, avoids appearing the part and damages.
Specifically, the shape of the mounting through-hole 21 is a rectangle, a circle, or other shapes, such as a square, a polygon, and the like, which are not limited herein.
Further, as shown in fig. 1 to 3, in this embodiment, the concrete rib 20 is provided with a hoisting piece 13 whose bottom end extends into the bottom plate 10, the bottom end of the hoisting piece 13 is fixedly connected to the prestressed reinforcement 11 and the distributed reinforcement 12, and the hoisting piece 13 and the installation through hole 21 are arranged in a staggered manner. Through setting up hoist and mount piece 13, can be convenient for hoist and mount the predetermined height with ribbed bottom plate of prefabricated prestressing force in the work progress. Specifically, the hoisting member 13 may be a hoisting rib, a hoisting nail, a hoisting ring or other structures convenient for hoisting the pre-stressed ribbed bottom plate, and is not limited herein. If the installation through hole 21 is not formed in practical application, the hoisting piece 13 can be arranged in the middle of the prefabricated prestressed ribbed bottom plate, so that the hoisting piece 13 is stressed conveniently.
Specifically, the number of the hoisting pieces 13 is multiple and evenly distributed on the base plate 10 at equal intervals, and the specific number of the hoisting pieces 13 is related to the specific size of the prefabricated prestressed ribbed base plate.
Further, as shown in fig. 4, in this embodiment, a prefabricated fixing member 14 is further disposed at the bottom end of the bottom plate 10, the prefabricated fixing member 14 is fixedly connected to the prestressed reinforcement 11 and the distributed reinforcement 12, and the prefabricated fixing member 14 and the installation through hole 21 are disposed in a staggered manner. Specifically, prefabricated mounting 14 is pre-buried bolt isotructure, through setting up prefabricated mounting 14, can just with hang fitment and water and electricity pipeline's pre-buried.
Specifically, the concrete ribs 20 are square in shape, so that the processing of the pre-stressed ribbed floor can be facilitated; of course, the concrete ribs 20 may also be "T" shaped, so that the cast-in-place layer and the concrete ribs 20 form a structure that is engaged with each other after casting.
Further, in this embodiment, the thickness of the bottom plate 10 is 30mm to 100mm, so that the prestressed reinforcement 11 meets the fireproof requirement, and the width of the concrete rib 20 is 50mm to 400mm, and the height thereof is 30mm to 500 mm. Through setting up reasonable cross-sectional dimension, 11 quantity of prestressing steel and the accurate location in the board, the anti-arch of prefabricated prestressing force ribbed bottom plate is effectively controlled.
Further, in the present embodiment, the top surface and the side surface of the base plate 10 are rough surfaces. In the manufacturing process of the prefabricated prestressed ribbed bottom plate, after the distributed steel bars 12 bound at the top of the prestressed steel bars 11 are arranged and concrete is poured, rough surfaces are required to be arranged on the upper surface and the side surfaces of the bottom plate 10 through galling before the initial setting of the concrete, and the rough surfaces can also be arranged through chiseling, printing or chemical treatment and other forms after the solidification of the concrete, so that grout skin on the surface of the prefabricated prestressed ribbed bottom plate can be removed, and hidden danger or harm to the construction process is avoided.
As shown in fig. 5-6, the embodiment of the utility model provides a concrete composite slab still provides, including a plurality of foretell prestressing force ribbed bottom plate and coincide concrete layer 30, prestressing force ribbed bottom plate is including the bottom plate 10 that is the cuboid, and locate the concrete rib 20 that bottom plate 10 top and the length direction that sets up along bottom plate 10, many concrete rib 20 and the concatenation of prestressing force ribbed bottom plate form and fill chamber 40, set up the installation through-hole 21 that sets up along the width direction of bottom plate 10 on the concrete rib 20, it is equipped with the longitudinal reinforcement 41 the same with prestressing force ribbed bottom plate length direction to fill in the chamber 40, and the first transverse reinforcement 42 the same with prestressing force ribbed bottom plate width direction, prestressing force ribbed bottom plate top is located in the coincide concrete layer 30 and fills in the chamber 40.
The utility model discloses concrete superimposed sheet is through using foretell prestressing force ribbed bottom plate to set up first transverse reinforcement 42 and longitudinal reinforcement 41 in pouring chamber 40, again with a plurality of prestressing force ribbed bottom plates through pouring superimposed concrete layer 30, make superimposed concrete layer 30 set up in prestressing force ribbed bottom plate top and pour the intracavity 40, make to form concrete superimposed sheet with a plurality of prestressing force ribbed bottom plate combinations. The concrete laminated slab has the advantages of good integrity, crack resistance and bearing capacity, large span application range, good economy and the like.
Further, as shown in fig. 5 to 6, in the present embodiment, a second transverse steel bar 43 parallel to the first transverse steel bar 42 is further disposed in the pouring cavity 40, each second transverse steel bar 43 passes through all the installation through holes 21 in a single row, and both the first transverse steel bar 42 and the second transverse steel bar 43 are disposed above the longitudinal steel bar 41. Through setting up second transverse reinforcement 43 for a plurality of prefabricated prestressing force ribbed bottom plates form a whole, and the aspect ratio of prefabricated prestressing force ribbed bottom plate after the combination is greater than 3, makes the prefabricated prestressing force ribbed bottom plate after the combination for two-way atress and have reliable transmission horizontal force, and then satisfies high-rise or super high-rise building's user demand.
Specifically, the concrete ribs 20 are square in shape, so that the processing of the pre-stressed ribbed floor can be facilitated; certainly, the shape of concrete rib 20 can also be "T" type, like this, pour the back, coincide concrete layer 30 and concrete rib 20 can form the structure of mutual block, and the part of coincide concrete layer 30 can be gone on in the installation through-hole 21 for prefabricated prestressing force ribbed bottom plate and coincide concrete layer 30 form a whole, and then make concrete composite slab's stability good.
Specifically, in the present embodiment, each side of the bottom plate 10 is provided with a cut for facilitating casting, specifically, the cut is provided with a cut on both the top of the bottom plate 10 and the bottom of the bottom plate 10, or only the bottom of the bottom plate 10 is provided with a chamfer, which is not limited herein.
Specifically, in this embodiment, hoist after the preparation of prefabricated prestressing force ribbed bottom plate and construct the place after cast in situ concrete and form concrete laminated slab, but not limited to this kind of condition, can also pour into and adopt local light material in the chamber 40, perhaps the laminated concrete layer 30 adopts the light material to fill the back upper portion and pour the concrete again, these are all in the utility model discloses a protection within range.
Specifically, in this embodiment, the manufacturing method of the concrete composite slab includes:
s1: providing a mould, drawing the prestressed reinforcement 11 by using a pulling force of a reinforcement ultimate strength standard value with a pulling force of 0.5-1 time, binding a distributed reinforcement 12 vertical to the prestressed reinforcement 11 below the prestressed reinforcement 11, and pouring concrete to form a primary prefabricated prestressed ribbed bottom plate;
s2: arranging concrete ribs 20 on the primary prefabricated ribbed bottom plate, and arranging installation through holes 21 on the concrete ribs 20 to form a secondary prefabricated ribbed bottom plate;
s3: before the initial setting of the secondary prefabricated prestressed ribbed bottom plate, rough surfaces are arranged on the upper surface and the side surfaces of the bottom plate 10 through roughening, a hoisting piece 13 and a prefabricated fixing piece 14 are installed, and the secondary prefabricated prestressed ribbed bottom plate is stretched after the strength of concrete reaches 0.7-1.0 time of the design strength;
s4: when the strength of the concrete reaches the design strength, a prefabricated prestressed ribbed bottom plate is formed, and the prefabricated prestressed ribbed bottom plate is transported to a construction site;
s5: at least two prefabricated prestressed ribbed bottom plates are placed side by side, first transverse steel bars 42 and longitudinal steel bars 41 are arranged in a pouring cavity 40, second transverse steel bars 43 penetrate through all the installation through holes 21 in a single row, and the pouring cavity 40 and the prefabricated prestressed ribbed bottom plates are poured to form the concrete composite slab.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A prefabricated prestressed ribbed bottom plate is characterized in that: including the bottom plate that is the cuboid, and locate the bottom plate top is followed the concrete rib that the length direction of bottom plate set up, the length of concrete rib with the length of bottom plate is the same, be equipped with a plurality of prestressed reinforcement that set up side by side that adopt pretension method stretch-draw to form in the bottom plate, each prestressed reinforcement follows bottom plate length direction sets up, each the prestressed reinforcement downside all ligature has a plurality of distributed reinforcement, and is a plurality of distributed reinforcement follows bottom plate width direction interval sets up.
2. The pre-fabricated prestressed ribbed floor slab of claim 1, wherein: the concrete rib is close to one side of the bottom plate is provided with an installation through hole penetrating through the concrete rib, and the installation through hole is arranged along the width direction of the bottom plate.
3. The pre-fabricated pre-stressed ribbed floor panel of claim 2, wherein: the quantity of mounting through-hole is a plurality of, and is a plurality of the mounting through-hole evenly equidistant interval set up in on the concrete rib.
4. The pre-fabricated prestressed ribbed floor according to claim 2 or 3, characterized in that: the concrete rib is provided with a hoisting piece, the bottom end of the hoisting piece extends into the bottom plate, the bottom end of the hoisting piece is fixedly connected with the prestressed steel bars and the distributed steel bars respectively, and the hoisting piece and the installation through holes are arranged in a staggered mode.
5. The pre-fabricated prestressed ribbed floor according to claim 2 or 3, characterized in that: the bottom of bottom plate still is equipped with prefabricated mounting, prefabricated mounting respectively with prestressing steel and distribution reinforcement fixed connection, just prefabricated mounting with the mounting hole dislocation set.
6. The pre-fabricated prestressed ribbed floor according to claim 2 or 3, characterized in that: the width of the concrete rib is 50 mm-400 mm, and the height is 30 mm-500 mm.
7. The pre-fabricated prestressed ribbed floor according to claim 2 or 3, characterized in that: the top surface and the side surface of the bottom plate are rough surfaces.
8. Concrete superimposed sheet, its characterized in that: including a plurality of prefabricated prestressing force ribbed bottom plate and coincide concrete layer of any claim 2 ~ 7, prefabricated prestressing force ribbed bottom plate is including the bottom plate that is the cuboid, and locate the bottom plate top is followed the concrete rib that the length direction of bottom plate set up, adjacent many the concrete rib with prefabricated prestressing force ribbed bottom plate concatenation forms fills the chamber, set up on the concrete rib along the installation through-hole that the width direction of bottom plate set up, fill the intracavity be equipped with the same longitudinal reinforcement of prefabricated prestressing force ribbed bottom plate length direction, and with the same first transverse reinforcement of prefabricated prestressing force ribbed bottom plate width direction, coincide concrete layer locates prefabricated prestressing force ribbed bottom plate top and fill the intracavity.
9. The concrete composite slab according to claim 8, wherein: the pouring cavity is also internally provided with a second transverse steel bar parallel to the first transverse steel bar, and the second transverse steel bar penetrates through all the mounting through holes in the single row.
10. A concrete composite according to claim 9 wherein: the first transverse steel bar and the second transverse steel bar are arranged above the longitudinal steel bar.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485611A (en) * | 2019-08-09 | 2019-11-22 | 中建科技有限公司深圳分公司 | Precast prestressed bottom plate with ribbing and overlapping cavity body structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485611A (en) * | 2019-08-09 | 2019-11-22 | 中建科技有限公司深圳分公司 | Precast prestressed bottom plate with ribbing and overlapping cavity body structure |
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