Reinforced concrete laminated slab structure based on corbel and manufacturing method of reinforced concrete laminated slab structure

Abstract

The invention discloses a reinforced concrete laminated slab structure based on brackets and a manufacturing method thereof, and relates to the technical field of building construction. According to the technical scheme, the prefabricated plate supporting frame and the bracket structure frame are included, the prefabricated plate supporting frame is connected with the bracket structure frame, the prefabricated plate supporting frame comprises prefabricated plate stress ribs and prefabricated plate distribution ribs, the prefabricated plate stress ribs and the prefabricated plate distribution ribs are connected in a binding mode, and tie bars are installed on the prefabricated plate stress ribs; the two ends of the Z-shaped steel bars are parallel to the prefabricated plate stress bars, and the Z-shaped steel bars are fixed to the prefabricated plate stress bars through the haunched area stirrups and the haunched area distribution bars. The method has the advantages that the construction period is short, the cost is low, the quality is easy to guarantee, the strength is high, transportation and hoisting are convenient, typesetting is flexible, an inner frame supporting system does not need to be erected, turnover materials and civilized construction expenses are reduced, the requirement for saving energy is met, and the method is universally suitable for the field of building construction.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a reinforced concrete composite slab structure based on a corbel and a manufacturing method thereof. Background Art

[0002] As a form of prefabricated construction, composite slabs have the advantages of no need to set up an internal support system, batch prefabrication, mechanized construction, labor cost savings, turnover materials, shortened construction period, and early installation. In recent years, my country's ground construction projects have made significant progress in the introduction of prefabricated and assembled technology, which has increased construction speed, improved building quality, and reduced negative impacts on the environment. However, the development of prefabricated and assembled technology for underground structures is relatively lagging, and it is easy to waste materials during the production process, which increases additional costs. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a reinforced concrete composite slab structure based on corbels and a method for manufacturing the same. By setting up prefabricated panels, corbel structures and armpit areas, and connecting the three together, the structure can be simply manufactured while ensuring strength, thereby achieving the effect of shortening the construction period and saving costs.

[0004] The above object of the present invention is achieved through the following technical solutions:

[0005] A reinforced concrete composite slab structure based on a corbel, comprising a precast slab support frame and a corbel structure frame, wherein the precast slab support frame is connected to the corbel structure, the precast slab support frame comprises precast slab stress reinforcement and precast slab distribution reinforcement and the two are tied together, tension reinforcement is installed on the precast slab stress reinforcement, and Z-shaped steel bars are further provided, wherein both ends of the Z-shaped steel bars are arranged parallel to the precast slab stress reinforcement, and the Z-shaped steel bars are fixed to the precast slab stress reinforcement through haunch area stirrups and haunch area distribution reinforcement.

[0006] In a preferred example, the present invention can be further configured as follows: the corbel structure frame is composed of corbel tension bars, corbel stirrups and corbel force bars, and a waterstop steel plate is also provided on one side of the corbel structure frame.

[0007] A method for manufacturing a reinforced concrete composite slab based on a corbel comprises the following steps:

[0008] a. Build the prefabricated panel support frame and the corbel structure frame;

[0009] b. Cast the corbel structure frame and precast slab support frame, and make wall corbels and precast slabs;

[0010] c. The precast slab and the cast-in-place slab are connected by tension bars and Z-shaped steel bars. The precast slab and the cast-in-place slab are combined into a composite slab. The precast slab and the haunch area are anchored and connected by the precast slab stress bars and Z-shaped steel bars extending into the pipe gallery wall.

[0011] d. When the concrete strength at the corbel reaches 70%, the precast panels can be hoisted.

[0012] In a preferred example, the present invention can be further configured as follows: when pouring concrete on the upper cast-in-place slab, the surface of the precast slab needs to be roughened or chiseled, and the surface roughness must not be less than 5 mm.

[0013] In a preferred example, the present invention can be further configured as follows: the size and layout of the prefabricated panels are appropriately adjusted according to actual conditions, and the mounting components are mounted on the prefabricated panels.

[0014] In a preferred example, the present invention can be further configured as follows: the thickness of the prefabricated board shall not be less than 100 mm, and shall not be less than one third of the total thickness of the composite board.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] 1. Through the setting of prefabricated panels, corbels and axillary areas, the interconnection between the three can ensure the strength while simplifying the production, thus achieving the effect of shortening the construction period and saving costs;

[0017] 2. Set up the added arm area and install it on the corbel to avoid conflict between the prefabricated panel installation and the inner side reinforcement of the wall.

[0018] In summary, the structural design of this technical solution can achieve the effects of short construction period and low cost, with clear structure and stable connection, which can ensure the quality of construction. In addition, it is easy to transport and hoist, flexible in layout, and does not require the establishment of an internal frame support system, which effectively reduces the cost of material use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the combination of the corbel structure frame and the prefabricated panel support frame in this technical solution;

[0020] Figure 2 It is a structural schematic diagram of the prefabricated panel support frame in this technical solution;

[0021] Figure 3 It is a structural schematic diagram of the corbel structure frame in this technical solution.

[0022] Figure numerals: 1. Cast-in-place slab; 2. Precast slab support frame; 21. Precast slab tension reinforcement; 22. Precast slab distribution reinforcement; 23. Tie reinforcement; 24. Z-shaped reinforcement; 25. Axillary area stirrups; 26. Axillary area distribution reinforcement; 27. Lifting ring; 3. Corbel structure frame; 31. Corbel tension reinforcement; 32. Corbel stirrups; 33. Corbel tension reinforcement; 4. Waterstop steel plate. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1-3 As shown, a reinforced concrete composite slab structure based on corbels disclosed in the present technical solution includes a precast slab support frame 2 and a corbel structure frame 3. The precast slab support frame 2 is used as a support frame for the cast-in-place slab 1 after being filled with concrete. The precast slab and the cast-in-place slab are composed to form a superimposed slab. The corbel structure frame 3 is used to support the precast slab support frame 2 after being filled with cement.

[0025] The precast panel support frame 2 is connected to the corbel structure frame 3. The precast panel support frame 2 includes a precast panel stress reinforcement 21 and a precast panel distribution reinforcement 22, and the two are tied together. The precast panel stress reinforcement 21 is installed with a tension reinforcement 23, and a Z-shaped steel bar 24 is also provided. The two ends of the Z-shaped steel bar 24 are arranged parallel to the precast panel stress reinforcement 21. The Z-shaped steel bar 24 is fixed to the precast panel stress reinforcement 21 through the axilla area stirrups 25 and the axilla area distribution reinforcement 26. The size and layout of the precast panel support frame 2 can be appropriately adjusted according to the actual situation to meet the strength requirements. The precast panel and the axilla area are anchored and connected by the precast panel stress reinforcement 21 and the Z-shaped steel bar 24 extending into the corridor wall, thereby ensuring that the precast panel is firmly combined with the corridor side wall.

[0026] The corbel structure frame 3 is composed of corbel tension bars 31, corbel stirrups 32 and corbel force bars 33. A water stop steel plate 4 is also provided on one side of the corbel structure frame 3. Figure 2 The water stop steel plate is not shown. The corbel extending outward from the inner side of the wall can avoid the conflict between the prefabricated plate installation and the inner side reinforcement of the wall, so that the inner side reinforcement of the wall can directly extend into the top cast-in-place plate 1.

[0027] A method for manufacturing a reinforced concrete composite slab based on a corbel comprises the following steps:

[0028] a. Build the precast slab support frame 2 and the corbel structure frame 3; the reinforcement of the corbel structure frame 3 is arranged. The reinforcement arrangement here refers to the adaptive arrangement made to ensure strength. The armpit area is added on both sides of the precast slab. The armpit area is installed on the corbel of the pipe gallery wall. The addition of the armpit area can effectively improve the strength and stability of the structure. The corbel extending out from the inside of the wall can avoid the conflict between the precast slab installation and the inner wall reinforcement, so that the inner reinforcement of the precast slab can directly extend into the top cast-in-place slab 1. The reinforcement of the corbel part can be arranged throughout the length according to the installation range of the composite slab, and stirrups are used to strengthen and connect the full-length reinforcement, so as to meet the permanent load of the composite slab and the variable load of construction personnel and materials.

[0029] b. Casting the corbel structure frame 3 and the precast panel support frame 2 to make the wall corbels and precast panels;

[0030] c. The precast panels and the axil area are connected by plate force bars and Z-shaped steel bars 24 extending into the corridor wall to form an anchor connection, thereby ensuring a stable connection between the precast panels and the corridor side walls. Considering that the main bars of the corridor structure are all large-diameter steel bars, the thickness of the corridor wall does not meet the requirements for straight anchoring of steel bars. Therefore, according to the relevant requirements of [Drawing rules for overall representation of concrete structure construction drawings and structural details (cast-in-place concrete frames, shear walls, beams, and slabs)] (22G101-1), anchor plates are used for anchoring. The setting here can achieve a stable connection effect;

[0031] The precast slab support frame 2 and the upper cast-in-place slab 1 can be connected by extending the upper part of the Z-shaped steel bar 24 into the cast-in-place slab 1 to a length that reaches the anchoring length or by adding an anchoring plate. The precast slab and the cast-in-place slab are combined into a composite slab, and before pouring concrete on the upper cast-in-place slab 1, the surface of the precast slab support frame 2 needs to be roughened or chiseled, and the surface unevenness must not be less than 5mm to ensure the connection strength and avoid the occurrence of gaps and other situations that affect the connection strength.

[0032] d. When the concrete strength at the corbel reaches 70%, the precast slab support frame 2 can be hoisted. Through theoretical analysis and experimental verification of the bearing capacity of the wall corbel, the precast slab support frame 2 can be hoisted when the concrete strength of the corbel reaches 70% of the design requirement. A lifting ring 27 is installed at the distribution reinforcement 26 in the armpit area, and the hoisting is carried out through the lifting ring. The initial strength of concrete rises quickly after pouring, and the time required for the corbel strength to reach 70% is short. Therefore, in the actual construction process, there is no need to set up the formwork at the bottom of the top plate and the full-frame support system. After the precast slab support frame 2 is installed, the next step can be carried out.

[0033] In addition, due to the complex design and use requirements of the tunnel, its structure needs to install various embedded parts and casing and other components. If each section of the tunnel uses prefabricated panels of the same size, the above-mentioned installation components may be located at two adjacent prefabricated panels. Therefore, the size and layout of the prefabricated panels can be appropriately adjusted according to the actual situation so that each installation component can be located on a separate prefabricated panel as much as possible to reduce the difficulty of construction; considering that the steel bars used in the main structure of the tunnel are all large-diameter steel bars, the protective layer and the bearing capacity requirements of the prefabricated panel support frame 2, the thickness of the prefabricated panel support frame 2 shall not be less than 100 mm, and shall not be less than one third of the total thickness of the composite panel.

[0034] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforced concrete composite slab structure based on a corbel, characterized in that: The invention comprises a precast plate support frame (2) and a corbel structure frame (3), wherein the precast plate support frame (2) is connected to the corbel structure frame (3), the precast plate support frame (2) comprises a precast plate stress reinforcement (21) and a precast plate distribution reinforcement (22), and the two are tied together, a tension reinforcement (23) is installed on the precast plate stress reinforcement (21), and a Z-shaped steel bar (24) is also provided, the two ends of the Z-shaped steel bar (24) are arranged parallel to the precast plate stress reinforcement (21), and the Z-shaped steel bar (24) is fixed to the precast plate stress reinforcement (21) through axilla area stirrups (25) and axilla area distribution reinforcement (26).

2. A reinforced concrete composite slab structure based on corbels according to claim 1, characterized in that: The corbel structure frame (3) is composed of corbel tension bars (31), corbel stirrups (32) and corbel force bars (33), and a water stop steel plate (4) is also provided on one side of the corbel structure frame (3).

3. A method for manufacturing a reinforced concrete composite slab based on a corbel based on the above construction structure, characterized in that: The steps include: a. Build a prefabricated panel support frame (2) and a corbel structure frame (3); b. Casting the corbel structure frame (3) and the precast panel support frame (2), making the wall corbel and precast panels; c. The precast slab and the cast-in-place slab (1) are connected by tension bars (23) and Z-shaped steel bars (24), the precast slab and the cast-in-place slab (1) are combined into a composite slab, and the precast slab and the haunch area are anchored and connected by the precast slab stress bars (21) and the Z-shaped steel bars (24) extending into the pipe gallery wall; d. When the concrete strength at the corbel reaches 70%, the precast panels can be hoisted.

4. The method for manufacturing a reinforced concrete composite slab based on a corbel according to claim 3, characterized in that: When pouring concrete for the upper cast-in-place slab (1), the surface of the precast slab needs to be roughened or chiseled, and the surface roughness shall not be less than 5 mm.

5. The method for manufacturing a reinforced concrete composite slab based on a corbel according to claim 3, characterized in that: The size and layout of the prefabricated panels are appropriately adjusted according to actual conditions, and the mounting components are installed on the prefabricated panels.

6. The method for manufacturing a reinforced concrete composite slab based on a corbel according to claim 3, characterized in that: The thickness of the prefabricated slab shall not be less than 100 mm and shall not be less than one third of the total thickness of the composite slab.

Images