Industrial plant steel-concrete composite structure floor slab construction method and floor slab

Abstract

The proposed method and slab construction for a steel-concrete composite floor structure for industrial plants utilizes an embedded connection system of concrete beams, H-shaped steel beams, and corrugated steel plate bottom forms to enhance seismic performance and maintain structural integrity. The concrete main beams are large, with H-shaped steel secondary beams embedded within them. The concrete main beams feature a wide variety of embedded components, high floor heights, and large spans. By preserving horizontal construction joints at the bottom of the floor slab atop the concrete main beams, the corrugated steel plate bottom formwork is laid, studs are welded, the floor slab reinforcement is tied, and the floor slab concrete is poured after the main beam concrete is poured. Compared to conventional floor slabs, the rationally reserved construction joints and the divided construction process significantly reduce the time required for carpentry to set up beam side formwork and the amount of work required to erect full-height support scaffolding. This facilitates the transportation of recyclable materials, improves construction efficiency, and saves both time and cost.

Description

Technical Field

[0001] The present invention relates to the field of floor slab construction, and in particular to a method for constructing a steel-concrete composite structure floor slab of an industrial plant and a floor slab obtained by the method. Background Art

[0002] Existing technologies combine steel beams with precast floor slabs, or precast floor slabs with precast beams. This allows for factory-prefabricated floor slabs, combining prefabrication with cast-in-place methods to achieve large-scale, integrated construction. These thin floor slabs are widely used in residential buildings, shopping malls, and other civil and public buildings. However, they are not suitable for unevenly distributed loads on floors with equipment, such as industrial plants and power plants.

[0003] For example, patent CN201820772574.4 discloses a novel steel-concrete composite floor structure with hidden beams. Its H-shaped steel serves entirely as the main beam. This composite floor structure not only integrates hidden beams with precast floor slabs, combining prefabrication with cast-in-place construction to achieve large-scale, integrated construction and improve on-site installation efficiency, but also enhances the overall strength of long-span floor slabs, reduces floor slab thickness and weight, and creates a spacious and aesthetically pleasing space without missing beams. It can be widely used in residential buildings, shopping malls, and other civil and public buildings. However, it is not suitable for industrial plants with uneven floor load distribution.

[0004] For example, patent CN200320113715.5 discloses a beam-block composite floor slab, comprising a floor slab formed of at least one unit beam-block composite structure, horizontally connected side by side. The unit beam-block composite structure comprises precast beams at both ends supporting precast blocks, which are then bonded together via a cast-in-place reinforced concrete layer or a cast-in-place concrete layer. This utility model offers excellent sound and thermal insulation, low cost, fast construction, and ease of factory production. However, this type of floor slab has a limited bearing capacity and cannot meet the load-bearing requirements of typical power plant equipment. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a method for constructing a steel-concrete composite structure floor in an industrial plant.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a method for constructing a steel-concrete composite structure floor of an industrial plant, comprising the following steps:

[0008] Step 1: Lay the frame beam support frame and bottom formwork, and tie the frame beam reinforcement on the bottom formwork after laying;

[0009] Step 2, after the upper and lower main reinforcement of the frame beam is bound, hoist the H-shaped steel beam, the two ends of the H-shaped steel beam are inserted into the reinforcement of the frame beam on both sides and connected with the reinforcement of the frame beam;

[0010] Step 3, install the beam side embedded part on the reinforcement of the frame beam;

[0011] Step 4, after the reinforcement is concealed and accepted, set up the side formwork of the frame beam;

[0012] Step 5, pour the concrete of the frame beam inside the beam side formwork, the pouring surface is flush with the upper opening of the inner beam side formwork, so that the horizontal construction joint is formed between the top of the concrete and the floor, and the construction joint is chiseled;

[0013] Step 6, remove the inner beam side formwork, install the support angle steel at the inner corner position of the frame beam after the beam side formwork is removed, and install the small steel secondary beam on the H-shaped steel beam;

[0014] Step 7, weld the profiled steel plate on the small steel secondary beam, the H-shaped steel beam and the support angle steel, and weld the stud on the profiled steel plate;

[0015] Step 8, bind the floor reinforcement, and anchor the floor reinforcement to the reserved reinforcement on the top of the frame beam;

[0016] Step 9, pour the floor concrete after the reinforcement is concealed and accepted.

[0017] As a further technical solution, the side formwork located on the outer side of the frame beam in step 4 is higher than the side formwork located on the inner side of the frame beam.

[0018] As a further technical solution, the upper opening of the side formwork located on the inner side of the frame beam in step 4 is controlled at 20mm from the bottom of the floor.

[0019] As a further technical solution, the H-shaped steel beam and the reinforcement cage of the frame beam are connected through the waist reinforcement, and the waist reinforcement passes through the reserved hole of the web of the H-shaped steel beam and is not disconnected.

[0020] As a further technical solution, the beam torsional reinforcement is also bound in the reinforcement cage of the frame beam.

[0021] As a further technical solution, the two ends of the H-shaped steel beam are poured together with the frame beam.

[0022] As a further technical solution, the profiled steel plate is wave-shaped.

[0023] As a further technical solution, the stud is welded at the lower concave position of the profiled steel plate.

[0024] As a further technical solution, the stud includes multiple columns and is welded on the profiled steel plate in sequence.

[0025] In a second aspect, the present application discloses a floor obtained by the construction method of the industrial plant steel-concrete composite structure floor.

[0026] The beneficial effects of the above embodiments of the present application are as follows:

[0027] 1. Compared with the general floor, the present application reasonably leaves a construction joint during construction, so that the frame beam and the floor are directly poured together at the intersection section, the steel bars of the frame beam and the steel bars of the floor are directly bundled together at the section, forming an integral whole, and then pouring is performed, so that the frame beam and the floor form a firm rigid connection; and the profiled steel sheet and the pegs are only arranged at the non-intersection section of the frame beam and the floor. Through the above design, on the one hand, the stress of the industrial plant steel-concrete composite structure is ensured, and on the other hand, the construction process is reasonably divided in combination with other steps of the present application, the profiled steel sheet laying and floor construction are separated from the frame column beam concrete construction process, the time for setting up the wooden side formwork and the amount of work for setting up the full-support scaffold are greatly reduced, the turnover of materials is more convenient, the construction efficiency is improved, and the construction time and engineering cost are saved.

[0028] 2. The present application also meets the bearing capacity required by the equipment on the floor by increasing the H-shaped steel beam and the small steel beam. Although the general floor can meet the bearing capacity requirement by increasing the concrete beam, the construction process is complex and the construction cost is high due to the need for formwork and support frame, and the self-weight is large. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute an improper limitation of the present application.

[0030] Figure 1 is a schematic diagram of the construction structure of the present application;

[0031] In the figure: 1 steel frame beam support frame and bottom form; 2 main beam steel bar, 3 H-shaped steel beam, 4 beam side embedded part, 5 beam side formwork and reinforcing keel, 6 frame beam concrete pouring position, 7 horizontal construction joint, 8 support angle steel and small steel beam, 9 profiled steel sheet and peg, 10 concrete floor; DETAILED DESCRIPTION

[0032] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0034] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0035] As introduced in the background technology, in order to solve the above technical problems, the present invention proposes a method for constructing steel-concrete composite structure floor slabs of industrial plants. By reserving a horizontal construction joint at the bottom of the floor slab at the top of the frame beam, the laying of corrugated steel plates and the floor slab construction are separated from the concrete construction process of the frame columns and beams. Then, the steel bars on the floor slab surface are inserted into the steel cage reserved at the top of the frame beam, so that the floor slab and the frame beam are rigidly connected. Its integrity is the same as the general construction method (columns, beams and slabs are cast together). At the same time, it greatly reduces the time for carpenters to support the beam side formwork and the amount of work for setting up full-floor supporting scaffolding, makes it more convenient to transport turnover materials, improves construction efficiency, and saves construction time and project costs.

[0036] In a typical embodiment of the present invention, Figure 1 As shown in the figure, the method for constructing the steel-concrete composite structure floor of an industrial plant proposed in this embodiment mainly involves reserving a horizontal joint at the bottom of the floor slab on top of the concrete frame beam, and then laying the corrugated steel plate to construct the floor slab after removing the side formwork of the frame beam, including the following steps:

[0037] Step 1: After the frame beam support frame and bottom formwork are laid, start tying the frame beam reinforcement; specifically, the frame beam reinforcement can be tied in situ; Figure 1 As shown, after the frame beam support frame and bottom formwork are laid, the frame beam reinforcement begins to be tied at its left and right ends;

[0038] Step 2: After the upper and lower main reinforcements of the frame beam are tied, start hoisting the H-shaped steel beam 3 so that the two ends of the H-shaped steel beam 3 are inserted into the frame beam reinforcement on both sides. Figure 1The ends of the H-shaped steel secondary beams are inserted into the concrete part, and when the frame beam is cast in the later stage, the two ends of the H-shaped steel beam 3 are cast in the frame beam; further, the H-shaped steel beam 3 in this embodiment is also provided with a reserved hole for connecting the H-shaped steel beam 3 and the frame beam reinforcement cage.

[0039] Step 3: Begin tying the beam torsion reinforcement and structural waist reinforcement on the basis of the frame beam reinforcement tied in step 1. The waist reinforcement passes through the reserved holes of the H-shaped steel beam web without breaking, thereby achieving fixation between the H-shaped steel beam 3 and the frame beam reinforcement cage. The beam torsion reinforcement is used to prevent the beam from twisting and deforming, and to increase the bearing capacity of the beam. After this step is completed, the reinforcement cage of the frame beam is basically completed.

[0040] Step 4: Install the embedded parts on the beam side; see Figure 1 The beam side embedded parts 4 are installed on the above-mentioned frame beam reinforcement; the embedded parts include steel plates, anchor bars, etc., which are used for installation and fixation of other external engineering foundations;

[0041] Step 5: After the hidden steel bar is accepted, the beam side formwork is set up. The top elevation of the beam side formwork is controlled at 20mm from the bottom of the floor slab; that is, a horizontal construction joint is reserved at the bottom of the floor slab at the top of the frame beam. Figure 1 As shown, in the beam side formwork, the beam side formwork located on the outside of the frame beam is higher than the beam side formwork located on the inside of the frame beam; the upper elevation of the side formwork located on the inside of the frame beam is controlled at 20mm from the bottom of the floor slab.

[0042] Step 6: Pour frame beam concrete inside the beam side formwork, with the pouring surface flush with the upper opening of the beam side formwork located on the inner side of the frame beam to form a horizontal construction joint at the upper opening, and perform roughening treatment on the horizontal construction joint to strengthen the connection between the floor surface and the frame beam;

[0043] Step 7: After the concrete of the frame beam solidifies, remove the side formwork in front of the beam. After the side formwork is removed, install support angle steel at the intersection of the frame beam and the rear floor slab. The support angle steel can serve as the connection and fixing point of the steel truss floor deck; weld small steel secondary beams between the H-shaped steel secondary beams. The support angle steel, small steel secondary beams, and H-shaped steel secondary beams are used together to support the beam edge corrugated steel plate; and the H-shaped steel secondary beams are arranged perpendicular to the small steel secondary beams to form a crisscross steel secondary beam support;

[0044] Step 8: Lay corrugated steel plates on top of the supporting angle steels, small steel secondary beams, and H-beam secondary beams, and weld several rows of bolts on the corrugated steel plates. It should be noted that the corrugated steel plates do not cover the top of the concrete frame beams mentioned above, because the top of the concrete frame beams needs to be poured together with the subsequent floor slabs.

[0045] Furthermore, the corrugated steel plate in this embodiment is wavy, and rows of studs are welded to the recessed positions of the wavy corrugated steel plate, which together with the corrugated steel plate play a role in supporting and reinforcing the floor surface.

[0046] Step 9: Tie the floor slab reinforcement. It should be noted that the floor slab reinforcement in this embodiment is anchored in the reinforcement reserved at the top of the frame beam, because in step 6, the frame beam concrete is only poured to the position flush with the upper edge of the beam side template on the inner side of the frame beam, and a section of frame beam reinforcement is reserved on the upper part. Figure 1 As shown, during this construction step, the steel bars on the floor surface can be connected with the steel bars reserved for the left and right frame beams, and then poured together later;

[0047] Step 10: After the steel bars described in step 9 are accepted, pouring of floor slab concrete begins. When the floor slab concrete solidifies and reaches the construction standard, the entire construction is completed.

[0048] This embodiment also discloses a floor slab obtained by the aforementioned method for constructing a steel-concrete composite structure floor slab for an industrial plant.

[0049] The present invention utilizes a composite steel-concrete floor slab for industrial plants. To enhance seismic performance and maintain structural integrity, it employs an embedded connection system consisting of a concrete beam, H-beam beam, and corrugated steel plate bottom formwork. The concrete main beams are large (beam heights greater than 1000 mm), and the H-beam secondary beams are embedded within the concrete main beams. The concrete main beams feature a wide variety of embedded components, high floor heights, and large spans. By preserving horizontal construction joints at the bottom of the floor slab atop the concrete main beams, the corrugated steel plate bottom formwork is laid, studs are welded, the floor slab reinforcement is tied, and the floor slab concrete is poured after the main beam concrete is poured. Compared to conventional floor slabs, the construction process is divided by properly leaving construction joints, significantly reducing the time required for carpentry to set up the beam side formwork and the amount of work required to erect full-height support scaffolding. This facilitates the transportation of recyclable materials, improves construction efficiency, and saves construction time and costs. By adding more H-beam secondary beams and varying their specifications, the floor slab load requirements of industrial plant floor equipment can be easily met.

[0050] Given the widespread application of the aforementioned steel-concrete composite floor slabs in industrial plants, the present invention can fundamentally simplify the construction process, creating an efficient construction flow, effectively resolving the long construction period, high labor requirements, and slow turnover of recyclable materials caused by complex construction procedures, thereby saving labor and project costs. By simplifying the construction process, it is also more conducive to the rapid reinforcement of concrete frame beams and solves problems such as grout leakage caused by loose joints between the corrugated steel plate bottom formwork and the frame beam wooden formwork.

[0051] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for constructing a steel-concrete composite structure floor of an industrial plant, characterized in that: The following steps are involved: Step 1: Lay the frame beam support frame and bottom formwork, and tie the frame beam reinforcement on the bottom formwork after laying; Step 2: After the upper and lower main reinforcements of the frame beam are tied, the H-shaped steel beam is hoisted. The two ends of the H-shaped steel beam are inserted into the frame beam reinforcements on both sides and connected with the frame beam reinforcements; Step 3: Install the beam side embedded parts on the frame beam reinforcement; Step 4: After the steel bars are concealed and accepted, support the frame beam side formwork; Step 5: Pour the frame beam concrete inside the beam side formwork, with the pouring surface flush with the upper edge of the inner beam side formwork, so that a horizontal construction joint is formed between the top of the concrete and the floor slab, and the construction joint is roughened; Step 6: Remove the inner beam side formwork. After removing the beam side formwork, install support angle steel at the inner corner of the frame beam and install the small steel secondary beam on the H-shaped steel beam; Step 7: Weld corrugated steel plates to the small steel secondary beams, H-shaped steel beams, and supporting angle steels, and weld studs to the corrugated steel plates; Step 8: Tie the floor slab reinforcement and anchor the floor slab reinforcement into the reinforcement reserved at the top of the frame beam; Step 9: Pour the floor slab concrete after the hidden steel bars have passed the inspection.

2. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, characterized in that: In step 4, the side formwork located on the outside of the frame beam is higher than the side formwork located on the inside of the frame beam.

3. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, wherein: In step 4, the elevation of the upper opening of the side formwork located on the inner side of the frame beam is controlled to be 20 mm from the bottom of the floor slab.

4. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, wherein: The H-shaped steel beam and the frame beam reinforcement cage are connected via waist reinforcement, and the waist reinforcement passes through the reserved holes of the web of the H-shaped steel beam without being disconnected.

5. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, characterized in that: Beam torsion-resistant steel bars are also tied to the frame beam reinforcement bars.

6. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, characterized in that: The two ends of the H-shaped steel beam are cast together with the frame beam.

7. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, characterized in that: The corrugated steel plate is wavy.

8. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, wherein: The studs are welded at the concave positions of the corrugated steel plates.

9. The method for constructing a steel-concrete composite structure floor of an industrial plant as claimed in claim 1, wherein: The studs comprise multiple rows, which are welded sequentially on the corrugated steel plate.

10. A floor slab, characterized in that: The method is obtained by the construction method of the steel-concrete composite structure floor of an industrial plant as described in any one of claims 1 to 9.

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