CN217949579U - Prefabricated bare concrete assembly plate type stair - Google Patents

Abstract

The utility model relates to a prefabricated clear water concrete assembly plate type stair, including concrete stair main part and arrangement of reinforcement, the arrangement of reinforcement is pre-buried in the concrete stair main part, concrete stair main part upper end has the upper horizontal assembly section, concrete stair main part lower extreme has the lower horizontal assembly section, be equipped with the hole of pin key reservation on the upper horizontal assembly section, be equipped with the hole of pin key reservation down on the lower horizontal assembly section; and a hoisting part is embedded in the concrete stair main body. The utility model discloses a prefabricated clear water concrete assembly plate stair turns into traditional operation face process unified to be produced by the mill, and to a great extent has reduced the construction degree of difficulty of operation face, has reduced the construction process of operation face, improves whole shaping precision, has reduced the quality general illness, and labor efficiency has obtained promoting by a wide margin, has also reduced the emission of pollutants such as construction noise, smoke and dust, and energy saving and emission reduction benefit is showing, can be used for exempting from to adorn in the building main structure work progress and maintain the body installation.

Description

Prefabricated bare concrete assembly plate type stair

Technical Field

The utility model relates to a building technical field, concretely relates to prefabricated clear water concrete assembly plate type stair.

Background

The traditional stair adopts a cast-in-place mode to build a concrete stair. Because the stair sections are in inclined irregular shapes, the stair sections are required to be subjected to processes of erecting templates, binding reinforcing steel bars, pouring concrete, maintaining, form removal and the like on the use site, the stair sections are greatly influenced by external factors, the pouring site space is narrow, the operation is inconvenient, and the difficulty of in-site pouring is high. And under the influence of gravity, the concrete placement surface is rough and uneven, often very big with design size deviation, often need carry on thick fitment and artifical chisel and can make level and find the alignment in later stage to cause the stair structure additional weight great and can't use before the template is demolishd from this, influence the perpendicular transport efficiency of floor working face.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve one kind or several kinds that prior art has technical problem, provide a prefabricated clear water concrete assembly plate stair.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a prefabricated bare concrete assembly plate type stair comprises a concrete stair body and reinforcing bars, wherein the reinforcing bars are pre-embedded in the concrete stair body, the upper end of the concrete stair body is provided with an upper horizontal assembly section, the lower end of the concrete stair body is provided with a lower horizontal assembly section, the upper horizontal assembly section is provided with an upper pin key reserved hole, and the lower horizontal assembly section is provided with a lower pin key reserved hole; and a hoisting part is embedded in the concrete stair main body.

The utility model has the advantages that: the utility model discloses a prefabricated clear water concrete assembly plate stair turns into traditional operation face process unified to be produced by the mill, and to a great extent has reduced the construction degree of difficulty of operation face, has reduced the construction process of operation face, improves whole shaping precision, has reduced the quality general illness, and labor efficiency has obtained promoting by a wide margin, has also reduced the emission of pollutants such as construction noise, smoke and dust, and energy saving and emission reduction benefit is showing, can be used for exempting from to adorn in the building main structure work progress and maintain the body installation.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, side hoisting pieces are embedded in the side faces of the left side and the right side of the concrete stair main body respectively; or/and an upper hoisting piece is embedded on the step surface of the concrete stair main body.

The beneficial effect of adopting the further scheme is that: by arranging the lateral hoisting piece and the upper hoisting piece, after the stairs are transported to a construction site, the stairs can be directly hoisted without complex process.

Furthermore, a hoisting reinforcing rib is also embedded in the concrete stair main body, the hoisting reinforcing rib is fixed on a reinforcing bar, and the hoisting reinforcing rib is arranged at a position adjacent to the upper hoisting part; and at least one hoisting reinforcing rib is arranged near each hoisting piece.

The beneficial effect of adopting the above further scheme is: through setting up hoist and mount strengthening rib, strengthen for the structure near hoist and mount piece.

Further, the hoist and mount strengthening rib is the shape of dividing long and with the ladder surface adaptation at hoist and mount piece place, the both ends of hoist and mount strengthening rib are followed respectively the extending direction of concrete stair main part is equipped with the linkage segment, the linkage segment with arrangement of reinforcement fixed connection.

The beneficial effect of adopting the further scheme is that: make strengthening rib and arrangement of reinforcement connect earlier fixed one-tenth whole, be favorable to pouring the shaping, also make the ladder face structure of stair more firm reliable.

Furthermore, an upper pin key reinforcing rib is pre-embedded in the upper horizontal assembly section, a lower pin key reinforcing rib is pre-embedded in the lower horizontal assembly section, the upper pin key reinforcing rib surrounds the upper pin key reserved hole, and the lower pin key reinforcing rib surrounds the lower pin key reserved hole.

The beneficial effect of adopting the further scheme is that: through setting up the round pin key strengthening rib, can carry out the structure for near the concrete in round pin key reservation hole and strengthen, be favorable to stair mounting structure's reliable and stable.

Furthermore, handrail welding plates are pre-embedded in step surfaces on the left side and the right side of the concrete step main body respectively.

The beneficial effect of adopting the above further scheme is: the handrail is convenient to install in the later period by welding the plate through the embedded handrail.

Furthermore, the reinforcing bars comprise longitudinal bars and transverse bars, the longitudinal bars are arranged along the extending direction of the concrete stair main body, and two ends of the longitudinal bars respectively extend into the upper horizontal assembling section and the lower horizontal assembling section of the concrete stair main body; the horizontal rib is along the ladder face transverse arrangement of concrete stair main part, horizontal rib with indulge muscle fixed connection.

The beneficial effect of adopting the above further scheme is: through setting up indulge muscle and horizontal muscle, be favorable to stair from vertical and horizontal stable in structure.

Further, indulge the muscle and follow the thickness direction of concrete stair main part and transversely be equipped with many respectively, horizontal muscle is followed the extending direction who indulges the muscle is equipped with the multiunit, every group horizontal muscle all with many it is connected to indulge muscle fixed connection.

The beneficial effect of adopting the further scheme is that: the longitudinal bars and the transverse bars form a grid structure, so that the whole structure of the cast concrete is stable and reliable.

Furthermore, the reinforcing ribs also comprise reinforcing ribs, and the upper horizontal assembling section and the lower horizontal assembling section are both provided with the reinforcing ribs; the reinforcing reinforcement comprises a plurality of transverse reinforcing ribs and a plurality of annular reinforcing ribs, the transverse reinforcing ribs are transversely arranged, the annular reinforcing ribs are arranged at the transverse intervals of the concrete stair main body, the transverse reinforcing ribs are arranged along the circumferential direction of the annular reinforcing ribs, and the transverse reinforcing ribs are fixedly connected with the annular reinforcing ribs.

The beneficial effect of adopting the further scheme is that: the reinforcing ribs are arranged, so that the structural stability of the upper horizontal assembly section and the lower horizontal assembly section is facilitated.

Further, still be equipped with horizontal arrangement's ladder step antiskid groove on the ladder face of concrete stair main part, the bottom surface of concrete stair main part is equipped with longitudinal arrangement's drip wire casing.

Drawings

Fig. 1 is a schematic view of the overhead structure of the precast fair-faced concrete assembled plate type staircase of the present invention;

fig. 2 is a schematic view of the prefabricated fair-faced concrete assembled plate type staircase according to the present invention;

fig. 3 is a schematic view of a side view structure of the interior of the prefabricated fair-faced concrete assembled plate type stair of the utility model;

fig. 4 is a schematic view of a side-view structure of the interior of the prefabricated fair-faced concrete assembled plate type stair of the utility model;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is an enlarged schematic view of the portion B in FIG. 4;

FIG. 7 is a schematic view of the structure of the longitudinal bars and the transverse bars;

FIG. 8 is a first schematic view of the configuration of the transverse reinforcing rib engaged with the annular reinforcing rib;

FIG. 9 is a second schematic view of the configuration of the transverse stiffener cooperating with the annular stiffener;

FIG. 10 is a schematic view of the structure of the upper horizontal assembly section assembly;

fig. 11 is a structural schematic diagram of the assembly of the lower horizontal assembly section.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a concrete stair body; 11. a step surface; 12. an upper horizontal assembly section; 13. a lower horizontal assembly section; 14. reserving a hole on the upper pin key; 15. reserving a hole in the lower pin key; 16. welding a plate on the handrail; 17. ladder step antiskid grooves; 18. a drip line trough;

2. a lateral hoisting member; 3. hoisting a piece; 4. hoisting the reinforcing ribs; 41. a connection section; 5. an upper pin key reinforcing rib; 51. a lower pin key reinforcing rib; 6. longitudinal ribs; 61. transverse ribs; 62. transverse reinforcing ribs; 63. an annular reinforcing rib; 7. upper connecting ribs; 71. and a lower connecting rib.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 11, the prefabricated fair-faced concrete assembled stair of the embodiment includes a concrete stair main body 1 and reinforcing bars, the reinforcing bars are pre-embedded in the concrete stair main body 1, an upper horizontal assembled section 12 is arranged at the upper end of the concrete stair main body 1, a lower horizontal assembled section 13 is arranged at the lower end of the concrete stair main body 1, an upper pin key reserved hole 14 is arranged on the upper horizontal assembled section 12, and a lower pin key reserved hole 15 is arranged on the lower horizontal assembled section 13; and a hoisting part is embedded in the concrete stair main body 1.

The number of layers, the width, the height and the like of the steps on the concrete stair main body 1 can be designed according to actual needs.

As shown in fig. 1 and 3, side hanging pieces 2 are embedded in the side surfaces of the left side and the right side of the concrete stair body 1 of the embodiment respectively; or/and an upper hoisting piece 3 is embedded in the step surface 11 of the concrete stair main body 1. Through setting up side direction hoist and mount piece and going up hoist and mount piece, after stair transported the job site, can directly hoist, no complicated technology only needs 2 signal workers and 1 ~ 2 workman can accomplish the hoist and mount, has increased work efficiency. Anchor bolts can be selected for hoisting pieces, the anchor bolts are reserved on the step surface of the cast-in-place stair according to the design positions, the anchoring can be completed by aligning the stair reserved holes with the anchor bolts during hoisting, a bottom support system is not needed, the support of the components is convenient, and the components are fast to place.

As shown in fig. 4, a hoisting reinforcing rib 4 is embedded in the concrete stair body 1 of the embodiment, the hoisting reinforcing rib 4 is fixed on a reinforcing bar, and the hoisting reinforcing rib 4 is arranged at a position adjacent to the upper hoisting part 3; and at least one hoisting reinforcing rib 4 is arranged near each hoisting piece 3. Through setting up hoist and mount strengthening rib, strengthen for the near structure of hoist and mount piece.

As shown in figure 4, the hoist and mount strengthening rib 4 of this embodiment is "long" shape and with the ladder surface 11 adaptation at hoist and mount piece 3 place, the both ends of hoist and mount strengthening rib 4 are followed respectively the extending direction of concrete stair main part 1 is equipped with linkage segment 41, linkage segment 41 with arrangement of reinforcement fixed connection. Make strengthening rib and arrangement of reinforcement connect earlier fixed one-tenth whole, be favorable to pouring the shaping, also make the ladder face structure of stair more firm reliable.

As shown in fig. 1, fig. 2, and fig. 4 to fig. 6, in the present embodiment, an upper pin key reinforcing rib 5 is further embedded in the upper horizontal assembly section 12, a lower pin key reinforcing rib 51 is further embedded in the lower horizontal assembly section 13, the upper pin key reinforcing rib 5 surrounds the upper pin key reserved hole 14, and the lower pin key reinforcing rib 51 surrounds the lower pin key reserved hole 15. Through setting up the round pin key strengthening rib, can carry out the structure for near the concrete in round pin key reservation hole and strengthen, be favorable to stair mounting structure's reliable and stable.

As shown in fig. 3, handrail welding plates 16 are embedded in the step surfaces 11 on the left and right sides of the concrete stair body 1 according to this embodiment. The handrail is convenient to install in the later period by welding the plate through the embedded handrail.

As shown in fig. 4 to 6, the reinforcing bars of the present embodiment include longitudinal bars 6 and transverse bars 61, the longitudinal bars 6 are arranged along the extending direction of the concrete stair main body 1, and both ends of the longitudinal bars 6 extend into the upper horizontal assembling section 12 and the lower horizontal assembling section 13 of the concrete stair main body 1, respectively; horizontal muscle 61 is followed the ladder face 11 horizontal arrangement of concrete stair main part 1, horizontal muscle 61 with indulge muscle 6 fixed connection. Through setting up indulge muscle and horizontal muscle, be favorable to stair from vertical and horizontal stable in structure.

The transverse rib 61 may be of an annular structure, or may be formed by enclosing more than two arc-shaped structural ribs.

As shown in fig. 7, the longitudinal bars 6 of this embodiment are respectively provided with a plurality of longitudinal bars along the thickness direction and the transverse direction of the concrete stair body 1, the transverse bars 61 are provided with a plurality of groups along the extending direction of the longitudinal bars 6, and each group of transverse bars 61 is fixedly connected with a plurality of longitudinal bars 6. The longitudinal bars and the transverse bars form a grid structure, so that the whole structure of the cast concrete is stable and reliable.

As shown in fig. 4 to 6, 8 and 9, the reinforcing bar of the present embodiment further includes a reinforcing bar, and the upper horizontal assembling section 12 and the lower horizontal assembling section 13 are both provided with the reinforcing bar; the reinforcing bar comprises a plurality of transverse reinforcing ribs 62 which are transversely arranged and a plurality of annular reinforcing ribs 63, the annular reinforcing ribs 63 are arranged along the transverse interval of the concrete stair main body 1, the transverse reinforcing ribs 62 are arranged along the circumferential direction of the annular reinforcing ribs 63, and each transverse reinforcing rib 62 is fixedly connected with the plurality of annular reinforcing ribs 63. The reinforcing ribs are arranged, so that the structural stability of the upper horizontal assembly section and the lower horizontal assembly section is facilitated.

Wherein, the annular reinforcing rib 63 can adopt an annular structure, as shown in fig. 9; or an annular structure formed by encircling more than two arc-shaped structural ribs can be adopted, as shown in fig. 8.

As shown in fig. 1 and 2, the stair surface 11 of the concrete stair body 1 is further provided with a horizontally arranged stair step anti-slip groove 17, and the bottom surface of the concrete stair body 1 is provided with a longitudinally arranged dripping line groove 18.

As shown in fig. 10 and 11, in this embodiment, an upper connecting rib 7 may be disposed in the upper pin key reserved hole 14, or a lower connecting rib 71 may be disposed in the lower pin key reserved hole 15, and the upper connecting rib 7 and the lower connecting rib 71 may be connected with the cast-in-place structure into a whole by using a specific connection manner according to their stress characteristics, so as to meet the requirements of structural bearing capacity and deformation. The prefabricated staircase adopts bolted connection or welded connection, and the post-cast concrete at the node part is connected to form a whole, so that the connection of components is reliable, and the structure is safe and durable. Because the prefabricated component of the connecting rib is prefabricated in a centralized manner, the operation specialization degree of workers is high, so that the working efficiency can be improved, and the labor force can be saved. The traditional operation surface procedures are uniformly transferred to factory production, so that the construction difficulty of the operation surface is reduced to a great extent, the construction procedures of the operation surface are reduced, and the labor efficiency is greatly improved. The labor required during installation is less, and the installation can be completed by only 3-5 persons generally. The connecting ribs are prefabricated in a centralized mode, so that raw material loss caused by construction site dispersion can be reduced, components can be effectively collected and processed in a sporadic manner, and construction cost is reduced. The loss of building materials is reduced by the factory production of the connecting rib component; the field wet operation is obviously reduced, and the generation of construction waste is reduced; the supporting area of the template is reduced, and the wood usage amount is reduced; the field engineering quantity of the steel bars and the concrete is reduced, the field water and electricity consumption is reduced, the emission of pollutants such as construction noise and smoke dust is reduced, and the energy-saving and emission-reducing benefits are remarkable.

In this embodiment, the "extending direction" is the inclined extending direction of the staircase in fig. 3.

The prefabricated clear water concrete assembly plate type stair of this embodiment is in the preparation, at first, the industrialization mill carries out regularization mould production according to prefabricated clear water concrete assembly plate type stair construction drawing, carry out the ligature to the arrangement of reinforcement according to design drawing requirement after mould production is accomplished, hoist and mount to the mould and seal the bottom surface mould after the ligature is accomplished, it is pre-buried to adopt the welded steel plate to carry out the handrail weld plate of stair railing after the arrangement of reinforcement hoist and mount is accomplished, hoist and mount piece is pre-buried etc. terraced step antiskid ribbed tile and drip line groove adopt trapezoidal metal strip to be fixed in the regularization mould peacefully respectively, pin key reserved hole adopts the PVC sleeve pipe to fix at stair arrangement of reinforcement reserved position. After all embedded parts are embedded, top surface mold closing and mold reinforcing are carried out, corresponding concrete is selected for pouring according to the strength grade of drawing design concrete after the reinforcing is finished, the mold is disassembled after the strength reaches the standard and the mold disassembling strength is allowed (the mold can be recycled after the mold is disassembled and the mold is coated with a release agent after surface cleaning), the prefabricated staircase is hoisted to a maintenance area for maintenance after the disassembling is finished, and the prefabricated staircase is delivered to the field for installation after the maintenance age is reached. And after the installation is finished, the waste template is adopted for surface protection, and after other decorations are finished, the template is dismantled for stair railing installation. Use the design template during the production of the prefabricated clear water concrete assembly plate stair of this embodiment, effectively avoided stepping height inconsistent, bench board bottom mark inconsistent, the unsatisfied requirement of reinforcing bar protective layer thickness, the line groove that drips is not straight, the surface is not smooth, irregular, quality common faults such as back-up unevenness. The stair components are produced in batches by professional prefabricated component factories, the conditions of steel bar welding, concrete pouring and maintenance are far superior to those of cast-in-place reinforced concrete stairs, and the finished concrete stairs have high quality standard, good appearance and the beautiful effect of fair-faced concrete.

The prefabricated fair-faced concrete assembly plate type stair of the embodiment uniformly turns into the traditional operation surface process to be produced by a factory, so that the construction difficulty of the operation surface is reduced to a great extent, the construction process of the operation surface is reduced, the integral forming precision is improved, the common quality problem is reduced, the labor efficiency is greatly improved, the emission of pollutants such as construction noise and smoke dust is also reduced, the energy-saving and emission-reducing benefits are remarkable, and the prefabricated fair-faced concrete assembly plate type stair can be used for installation of a decoration-free body in the construction process of a building main body structure. In addition, in the production process of the prefabricated bare concrete assembled plate type stair, the same template is recycled, the section size and the reinforcement position of the member and the flatness and the verticality of the member are strictly required, errors caused by assembling the template again in the traditional process are avoided, and the production precision is greatly improved. Because the surface layer of the stair in the residential engineering is mostly plastered by cement mortar, the finished surface of the prefabricated stair can reach the decoration level without secondary plastering. Meanwhile, the prefabricated staircase is used for replacing a cast-in-place staircase, so that the scraping cost caused by insufficient flatness of the finished surface of the structure can be effectively avoided, and the construction cost is greatly reduced.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., 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; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. The prefabricated fair-faced concrete assembled plate type stair is characterized by comprising a concrete stair body and reinforcing bars, wherein the reinforcing bars are embedded in the concrete stair body, an upper horizontal assembled section is arranged at the upper end of the concrete stair body, a lower horizontal assembled section is arranged at the lower end of the concrete stair body, an upper pin key reserved hole is formed in the upper horizontal assembled section, and a lower pin key reserved hole is formed in the lower horizontal assembled section; and a hoisting part is embedded in the concrete stair body.

2. The prefabricated fair-faced concrete assembled plate type stair as claimed in claim 1, wherein lateral hoisting pieces are embedded in the side faces of the left side and the right side of the concrete stair main body respectively; or/and an upper hoisting piece is embedded on the step surface of the concrete stair main body.

3. The prefabricated fair-faced concrete assembled plate type stair as claimed in claim 2, wherein hoisting reinforcing ribs are embedded in the concrete stair main body and fixed on reinforcing bars, and the hoisting reinforcing ribs are arranged at positions close to the hoisting pieces; and at least one hoisting reinforcing rib is arranged near each hoisting piece.

4. The prefabricated as-cast finish concrete assembled plate stair of claim 3, wherein the hoisting reinforcing rib is in a shape of long and is matched with a stepped surface where a hoisting part is arranged, two ends of the hoisting reinforcing rib are respectively provided with a connecting section along the extending direction of the concrete stair main body, and the connecting sections are fixedly connected with the reinforcing bars.

5. The prefabricated fair-faced concrete assembled plate type stair as claimed in claim 1, wherein upper pin key reinforcing ribs are embedded in the upper horizontal assembled section, lower pin key reinforcing ribs are embedded in the lower horizontal assembled section, the upper pin key reinforcing ribs surround the upper pin key reserved hole, and the lower pin key reinforcing ribs surround the lower pin key reserved hole.

6. The prefabricated fair-faced concrete assembled plate type stair as claimed in claim 1, wherein handrail welding plates are embedded in step surfaces on the left side and the right side of the concrete stair body respectively.

7. The prefabricated fair-faced concrete assembled plate type stair as claimed in claim 1, wherein the reinforcing bars comprise longitudinal bars and transverse bars, the longitudinal bars are arranged along the extending direction of the concrete stair main body, and two ends of the longitudinal bars extend into an upper horizontal assembling section and a lower horizontal assembling section of the concrete stair main body respectively; the horizontal rib is along the ladder face transverse arrangement of concrete stair main part, horizontal rib with indulge muscle fixed connection.

8. The prefabricated fair-faced concrete assembled plate type stair as claimed in claim 7, wherein the longitudinal ribs are respectively provided with a plurality of groups along the thickness direction and the transverse direction of the concrete stair body, the transverse ribs are provided with a plurality of groups along the extension direction of the longitudinal ribs, and each group of the transverse ribs is fixedly connected with the plurality of longitudinal ribs.

9. The prefabricated fair-faced concrete assembled stair of claim 1, wherein the reinforcing bars further comprise reinforcing bars, and the upper horizontal assembled section and the lower horizontal assembled section are provided with the reinforcing bars; the reinforcing reinforcement comprises a plurality of transverse reinforcing ribs and a plurality of annular reinforcing ribs, the transverse reinforcing ribs are transversely arranged, the annular reinforcing ribs are arranged at the transverse intervals of the concrete stair main body, the transverse reinforcing ribs are arranged along the circumferential direction of the annular reinforcing ribs, and the transverse reinforcing ribs are fixedly connected with the annular reinforcing ribs.

10. The prefabricated fair-faced concrete assembled plate type stair is characterized in that ladder step anti-slip grooves which are transversely arranged are further formed in the ladder surface of the concrete stair body, and water dripping line grooves which are longitudinally arranged are formed in the bottom surface of the concrete stair body.

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