Fabricated building PC roof panel

Abstract

The fabricated building PC roof panel comprises a ridge, a first slope surface and a second slope surface, the first slope surface and the second slope surface are located on the two sides of the ridge, a prefabricated plate is arranged on the first slope surface, a plurality of reserved steel bars are arranged in the prefabricated plate and extend outwards in the length direction of the prefabricated plate, and the reserved steel bars are bent and attached to the second slope surface. Concrete layers which are used for covering the reserved steel bars and are poured on the prefabricated slabs are poured on the first slope surface and the second slope surface; compared with the prior art, the prefabricated plate is arranged on the first slope surface, the reserved steel bars are arranged in the prefabricated plate, the reserved steel bars are bent to be attached to the second slope surface, and then concrete is poured, so that the roof panel is of an integrated structure and does not need to be spliced, the structural strength of the roof panel is improved, and the durability of the roof panel is improved; in addition, by bending the reserved steel bars, the construction difficulty is reduced, and meanwhile, the bending angles of the reserved steel bars can be controlled, so that different slope requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a prefabricated building PC roof panel. Background Art

[0002] Prefabricated buildings are widely used in various construction projects due to their advantages such as fast construction speed, stable quality, energy conservation and environmental protection. Among them, PC (precast concrete) roof panels, as important load-bearing and enclosing structures, play an important role in buildings. In particular, the PC roof panels at the ridge line usually need to be adjusted according to the actual situation to ensure the stability of their installation and the waterproofness of the roof. In an ideal state, the PC roof panels are symmetrically distributed on both sides of the ridge line. However, during the actual project construction process, it is often encountered that the PC roof panels cannot be symmetrically distributed on both sides of the ridge line, and there will be a bend at the ridge. In this way, it will not only increase the manufacturing difficulty of the precast roof panels, the installation complexity, the long construction time and the poor waterproof effect, but also easily lead to structural stress concentration, thereby affecting the overall structural strength and durability.

[0003] To solve the above problems, Chinese Patent with application number 202210949988.0 discloses a prefabricated roof ridge structure. The disclosed roof ridge structure includes a ridge and a connecting mechanism, as well as a plurality of roof panels fixed on the ridge through the connecting mechanism. It also includes: guiding chutes arranged on both sides of the ridge. The connecting mechanism includes a connecting profile, a pressing plate, a fastening nut, a rubber pad and a pre-tightening structure. A raised block is fixed on the connecting profile, and the raised block is in sliding fit with the guiding chute. Chinese Patent with application number 202010883092.8 discloses a prefabricated concrete inclined roof. The disclosed concrete inclined roof structure includes a ridge board and inclined roof panels. The inclined roof panels are arranged on the front and back sides of the ridge board. The inclined roof panels include a first inclined roof panel and a second inclined roof panel. The second inclined roof panel is spliced with the ridge board, and the first inclined roof panel is spliced with the second inclined roof panel. The first inclined roof panel, the second inclined roof panel and the ridge board are respectively connected to the cast-in-place frame beam.

[0004] In the above-disclosed prior art, the roof panels are connected through a connecting mechanism arranged at the ridge, or a ridge board is arranged on the ridge, and a first inclined roof panel and a second inclined roof panel are arranged on both sides of the ridge. The first inclined roof panel and the second inclined roof panel are spliced with the ridge board. In these above-mentioned schemes, the entire roof structure is formed by splicing. This kind of roof structure formed by splicing has low strength, is prone to separation and cracking over time, has poor durability, and the waterproof effect is reduced as the roof separates and cracks, thus easily resulting in water leakage. Summary of the Utility Model

[0005] The utility model aims to overcome the defects in the above-mentioned prior art and provides a prefabricated building PC roof panel with simple construction, high structural strength and good durability.

[0006] To achieve the above utility model purpose, the utility model adopts the following technical scheme: A prefabricated building PC roof panel includes a ridge and a first slope and a second slope located on both sides of the ridge. Prefabricated slabs are arranged on the first slope. A number of reserved steel bars are provided in the prefabricated slabs. The number of reserved steel bars extends outward along the length direction of the prefabricated slabs. The reserved steel bars are bent and attached to the second slope. A concrete layer is poured on the first slope and the second slope for covering the reserved steel bars and the prefabricated slabs.

[0007] As a preferred scheme of the utility model, a number of the reserved steel bars penetrate through the prefabricated slabs. Connecting steel bars for connecting a number of the reserved steel bars are provided on the reserved steel bars located outside the prefabricated slabs.

[0008] As a preferred scheme of the utility model, a number of the reserved steel bars are arranged in rows in the prefabricated slabs in sequence.

[0009] As a preferred scheme of the utility model, a number of reinforcing steel bars intersecting with the reserved steel bars are provided in the prefabricated slabs.

[0010] As a preferred scheme of the utility model, a number of steel bars connected to the reserved steel bars are provided on the prefabricated slabs, and the steel bars are convex structures formed on the surface of the prefabricated slabs.

[0011] As a preferred scheme of the utility model, a steel mesh connected to the prefabricated slabs is provided in the concrete layer, and the steel mesh is connected to the steel bars.

[0012] As a preferred scheme of the utility model, the steel mesh and the reserved steel bars are tied to each other.

[0013] As a preferred scheme of the utility model, a pouring gap is formed between the steel mesh and the prefabricated slabs, and a pouring gap is also formed between the steel mesh and the reserved steel bars.

[0014] As a preferred scheme of the utility model, the concrete layers on both sides of the ridge are integrally poured structures.

[0015] As a preferred scheme of the utility model, a waterproof structure is provided at the ridge, and the waterproof structure is integrally poured and arranged with the concrete layer.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. By setting precast slabs on the first slope surface, with reserved steel bars provided in the precast slabs, the reserved steel bars are bent to fit on the second slope surface, and then concrete is poured, so that the connection between the first slope surface and the second slope surface is realized through the reserved steel bars, making the roof slab an integral structure without splicing, improving the structural strength of the roof slab, increasing the durability of the roof slab. In addition, by bending the reserved steel bars, the construction difficulty is reduced, and the bending angle of the reserved steel bars can also be controlled, thus adapting to different slope requirements;

[0018] 2. Further, by setting strengthening steel bars in the precast slabs, the structural strength of the precast slabs is improved, and by setting a steel mesh in the concrete layer, while improving the structural strength of the concrete layer, the connection strength between the concrete layer and the precast slabs is also improved. In addition, through the integrally poured concrete layer and the waterproof structure, the structural strength of the entire roof is improved, and at the same time, the waterproof effect of the ridge is ensured. Description of the Drawings

[0019] Figure 1 is a structural schematic diagram of the present utility model;

[0020] Figure 2 is a structural schematic diagram of the precast slab of the present utility model;

[0021] Figure 3 is a reinforcement layout diagram of the precast slab of the present utility model

[0022] Reference numerals: precast slab 1, strengthening steel bar 101, steel bar 102, reserved steel bar 2, connecting steel bar 201, concrete layer 3, ridge 4, first slope surface 401, second slope surface 402, steel mesh 5, waterproof structure 6, pouring gap 7. Detailed Embodiment

[0023] The following will describe in detail the embodiments of the present utility model with reference to the drawings.

[0024] As Figures 1 - 3 shown, an assembled building PC roof slab includes a ridge 4 and a first slope surface 401 and a second slope surface 402 on both sides of the ridge 4. A precast slab 1 is provided on the first slope surface 401. A number of reserved steel bars 2 are provided in the precast slab 1. The number of reserved steel bars 2 extends outward along the length direction of the precast slab 1. The reserved steel bars 2 are bent and fit on the second slope surface 402. A concrete layer 3 for covering the reserved steel bars 2 and the precast slab 1 is poured on the first slope surface 401 and the second slope surface 402.

[0025] Furthermore, the precast slab 1 is a concrete structural slab prefabricated according to the dimensions of the first slope surface 401. When manufacturing the precast slab 1, the reserved steel bars 2 are distributed and placed, and the precast slab 1 is formed by pouring concrete at the ends of the reserved steel bars 2. The precast slab 1 is placed at the first slope surface 401, and the reserved steel bars 2 extend upward out of the first slope surface 401. The reserved steel bars 2 are bent at the ridge 4 so that the reserved steel bars 2 are attached to the second slope surface 402. Concrete is poured at the reserved steel bars 2, and at the same time, concrete is poured on the precast slab 1, thereby forming the concrete layer 3, so that the roof slab is an integral structure without splicing, improving the structural strength of the roof slab and increasing the durability of the roof slab. In addition, by bending the reserved steel bars 2, the construction difficulty is reduced, and the bending angle of the reserved steel bars 2 can also be controlled, thereby adapting to different slope requirements.

[0026] A number of reserved steel bars 2 penetrate through the precast slab 1. A connecting steel bar 201 for connecting a number of reserved steel bars 2 is provided on the reserved steel bars 2 outside the precast slab 1. Furthermore, the reserved steel bars 2 are arranged in rows in the precast slab 1 in sequence. The connecting steel bar 201 is arranged along the radial direction of the reserved steel bars 2, and the connecting steel bar 201 is welded to each reserved steel bar 2, so that the distance between a number of reserved steel bars 2 remains unchanged. A number of reserved steel bars 2 are equidistantly distributed along the width direction of the precast slab 1. At the same time, under the action of the connecting steel bar 201, it is ensured that the reserved steel bars 2 can be evenly distributed in the concrete layer 3 when pouring concrete, thereby improving the structural strength of the concrete layer 3.

[0027] A number of reinforcing steel bars 101 intersecting with the reserved steel bars 2 are provided in the precast slab 1. Furthermore, the reinforcing steel bars 101 are arranged along the radial direction of the reserved steel bars 2, and a number of reinforcing steel bars 101 are evenly distributed along the length direction of the reserved steel bars 2. The structural strength of the precast slab 1 is improved by providing the reinforcing steel bars 101.

[0028] A number of steel bars 102 connected to the reserved steel bars 2 are provided on the precast slab 1, and the steel bars 102 are convex structures formed on the surface of the precast slab 1. In addition, a steel bar mesh 5 connected to the precast slab 1 is provided in the concrete layer 3. The steel bar mesh 5 is connected to the steel bars 102, and at the same time, the steel bar mesh 5 is tied to the reserved steel bars 2. The structural strength of the concrete layer 3 is improved by providing the steel bar mesh 5, and the steel bar mesh 5 is tied and connected to the reserved steel bars 2 and the steel bars 102 of the precast slab 1, improving the connection strength between the concrete layer 3 and the reserved steel bars 2 and the precast slab 1.

[0029] A pouring gap 7 is formed between the steel bar mesh 5 and the precast slab 1, and a pouring gap 7 is also formed between the steel bar mesh 5 and the reserved steel bars 2. Furthermore, concrete is poured in the pouring gap 7, so that there are no pouring voids between the steel bar mesh 5 and the precast slab 1 and between the steel bar mesh 5 and the reserved steel bars 2, improving the pouring effect of the concrete.

[0030] The concrete layers 3 on both sides of the ridge 4 are integrally cast structures, which improves the structural strength of the entire roof slab. At the same time, a waterproof structure 6 is provided at the ridge 4, and the waterproof structure 6 is integrally cast with the concrete layer 3, ensuring the strength of the roof and improving the durability and waterproofness of the roof.

[0031] Working principle: The original PC precast roof slab method at the bent part of the ridge 4 is changed to cast-in-place concrete, and the construction of the connection part between the two is done well.

[0032] Working process

[0033] 1. Preliminary preparation work

[0034] Familiarize with and review the construction drawings and relevant design materials, deeply analyze the construction drawings, understand the basic general situation such as the designed thickness and slope of the roof, and do a good job in the deepening of the PC roof slab construction drawings.

[0035] 2. Prefabrication of the precast slab 1

[0036] It is manufactured by a professional precast component manufacturer according to the deepened drawings. The precast roof slab at this ridge is precast according to the on-site design dimensions. One side is the PC precast slab 1, and the other side near the ridge is the reserved steel bars 2, which can be bent according to the slope at the ridge during actual construction.

[0037] 3. On-site hoisting of the precast slab 1

[0038] The main hoisting work at the construction site is carried out by a tower crane, and an automobile crane is used for auxiliary hoisting. The hoisting and laying are carried out in sequence according to the designed installation layout drawing. When hoisting, the hoisting point position shall be based on the deepened design drawing or the hoisting point position marked on the precast components on site. Before hoisting the precast slab 1, the support foundation surface and the bottom surface of the precast slab 1 shall be cleaned to avoid point support; after the precast slab 1 is installed, the elevation shall be checked and adjusted, and the adjustable support under the slab shall be adjusted. After the precast slab 1 at this ridge is hoisted, the lower edge of the slab should not be uneven, nor should there be gaps. The gaps at the supports that cannot be adjusted locally should be sealed; the support columns can be appropriately adjusted to keep the bottom surface of the slab flat and seamless.

[0039] 4. Construction of the cast-in-place concrete structure

[0040] Reinforcing bars are reserved in the bent part of the precast slab 1 and extended to the cast-in-place concrete area of the second slope 402. The reserved reinforcing bars 2 are bent appropriately according to the designed slope. The bending process can be carried out by special tools or equipment to ensure the accuracy of the bending angle and shape. Before the construction of cast-in-place concrete, the reserved reinforcing bars 2 are tied to the steel bar mesh 5 in the concrete layer 3 to form an integral stress-bearing structure. Then, the cast-in-place concrete construction is carried out, and the reinforcement construction of the connection part is carried out, including steel bar connection, concrete pouring and joint treatment, etc., to ensure the integrity and tightness of the structure. After the concrete is cured to the specified strength, a stable ridge structure is formed.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0042] Although terms such as precast slab 1, reinforcing bar 101, steel bar 102, reserved reinforcing bar 2, connecting steel bar 201, concrete layer 3, ridge 4, first slope 401, second slope 402, steel bar mesh 5, waterproof structure 6, pouring gap 7, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A prefabricated building PC roof panel, comprising a ridge (4) and a first slope surface (401) and a second slope surface (402) located on both sides of the ridge (4), characterized in that, A precast slab (1) is arranged on the first slope surface (401). A number of reserved steel bars (2) are provided in the precast slab (1). The number of reserved steel bars (2) extends outward along the length direction of the precast slab (1). The reserved steel bars (2) are bent and attached to the second slope surface (402). A concrete layer (3) for covering the reserved steel bars (2) and the precast slab (1) is cast on the first slope surface (401) and the second slope surface (402).

2. The precast concrete roof slab for prefabricated building according to claim 1, characterized in that, A number of the reserved steel bars (2) penetrate through the precast slab (1). Connecting steel bars (201) for connecting the number of reserved steel bars (2) are provided on the reserved steel bars (2) located outside the precast slab (1).

3. The precast concrete roof panel for prefabricated building according to claim 1, characterized in that, A number of the reserved steel bars (2) are arranged in rows in sequence within the precast slab (1).

4. A prefabricated building PC roof panel according to claim 1, characterized in that, A number of reinforcing steel bars (101) intersecting with the reserved steel bars (2) are provided within the precast slab (1).

5. A prefabricated building PC roof panel according to claim 1, characterized in that, A number of steel bars (102) connected to the reserved steel bars (2) are provided on the precast slab (1), and the steel bars (102) are protruding structures formed on the surface of the precast slab (1).

6. The precast concrete roof panel for prefabricated building according to claim 5, wherein A steel bar mesh (5) connected to the precast slab (1) is provided in the concrete layer (3), and the steel bar mesh (5) is connected to the steel bars (102).

7. The precast concrete roof slab for prefabricated building according to claim 6, characterized in that, The steel bar mesh (5) and the reserved steel bars (2) are bound to each other.

8. The precast concrete roof slab for prefabricated building according to claim 6, characterized in that, A casting gap (7) is formed between the steel bar mesh (5) and the precast slab (1), and a casting gap (7) is also formed between the steel bar mesh (5) and the reserved steel bars (2).

9. The precast concrete roof panel for prefabricated building according to claim 1, characterized in that, The concrete layers (3) on both sides of the ridge (4) are of an integrally cast structure.

10. The precast concrete roof slab for prefabricated building according to claim 1, wherein, A waterproof structure (6) is provided at the ridge (4), and the waterproof structure (6) is integrally cast with the concrete layer (3).

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