Pre-embedded steel plate positioning brackets and installation methods for large-area ground pre-embedded steel plates

Abstract

This invention provides a positioning bracket for pre-embedded steel plates and a method for installing large-area pre-embedded steel plates in the ground. The positioning bracket includes: a base frame, which is a rectangular frame that matches multiple pre-embedded steel plates; and positioning components, including four corner positioning pieces respectively located at the four corners of the base frame, and multiple side positioning pieces spaced apart at the four sides of the base frame. The base frame is formed by welding multiple flat steel bars end-to-end. Each corner positioning piece has an angle steel and two corner supporting steel bars. The bottom of the angle steel is welded to the corner of the base frame, and the two corner supporting steel bars are welded to both sides of the inner surface of the angle steel. Each side positioning piece has a side positioning flat steel and two side supporting steel bars. The bottom of the side positioning flat steel is welded to the side of the base frame, and the two side supporting steel bars are symmetrically welded to the inner surface of the side positioning flat steel. The corner supporting steel bars and the side supporting steel bars have the same height and are both less than the height of the angle steel and the side positioning flat steel.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, specifically relating to a pre-embedded steel plate positioning bracket and a construction method for installing large-area pre-embedded steel plates. Background Technology

[0002] Ground-embedded steel plates play a crucial role in building and infrastructure construction. The method of fixing steel plates is a commonly used technique in building construction, providing effective fixation and support, and ensuring air stability and reliability by embedding steel plates into concrete components. Embedded steel plates and components are not only widely used in traditional high-rise buildings, bridges, and industrial plants, but also have enormous potential in emerging fields with the development of technology.

[0003] However, in the conventional installation process of embedded parts, the embedded parts are usually welded and fixed to the steel bars in the concrete components. Large bolt embedded parts are positioned, adjusted, and fixed using positioning plates. In plain concrete floor structures, if there is enough installation space, the plain concrete is poured in two stages. The first stage involves pouring a thin layer of concrete to fix the anchor claws of the embedded parts. After the first stage is completed, the concrete is poured to the ground elevation, and finally, it is vibrated and cured.

[0004] For large embedded components seamlessly assembled from multiple parts, where the allowable installation space is limited, traditional construction methods cannot guarantee the density of the concrete beneath the embedded steel plate. Furthermore, the high installation precision required for these components stems from the specialized equipment used for installation, which prohibits the creation of air vents in the embedded steel plate. High-pressure grouting, on the other hand, necessitates modification of the grouting material and introduces pressure that disturbs the already fixed plate, compromising installation accuracy. Moreover, traditional methods can result in insufficient concrete density beneath the embedded steel plate, posing quality risks. Secondary grouting requires altering the ground materials, increasing construction costs and introducing further quality concerns. Summary of the Invention

[0005] To address the shortcomings of the prior art, the present invention aims to provide a pre-embedded steel plate positioning bracket and a method for installing large-area pre-embedded steel plates after installation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Option 1

[0008] This invention provides a pre-embedded steel plate positioning bracket for positioning and installing multiple pre-embedded steel plates spliced ​​together in sequence. It features a base frame, which is a rectangular frame matching the multiple pre-embedded steel plates; and positioning components, including four corner positioning members respectively disposed at the four corners of the base frame, and multiple side positioning members spaced apart at the four sides of the base frame. The base frame is formed by welding multiple flat steel bars end-to-end. Each corner positioning member has an angle steel and two supporting reinforcing bars as corner supporting reinforcing bars. The bottom of the angle steel is welded to the corner of the base frame, and the two corner supporting reinforcing bars are welded to both sides of the inner surface of the angle steel. Each side positioning member has a flat steel serving as a side positioning flat steel and two supporting reinforcing bars as side supporting reinforcing bars. The bottom of the side positioning flat steel is welded to the side of the base frame, and the two side supporting reinforcing bars are symmetrically welded to the inner surface of the side positioning flat steel. The corner supporting reinforcing bars and the side supporting reinforcing bars have the same height and are both less than the height of the angle steel and the side positioning flat steel.

[0009] The pre-embedded steel plate positioning bracket provided by the present invention may also have the following features: wherein the angle steel is set at the outer edge of the corner of the bottom frame, and the side positioning flat steel is set at the outer edge of the side of the bottom frame.

[0010] The pre-embedded steel plate positioning bracket provided by the present invention may also have the following feature: a reinforcing bar is provided between two adjacent corner positioning parts as a peripheral reinforcing bar, and the two ends of the peripheral reinforcing bar are respectively welded to the two corresponding angle steels.

[0011] The pre-embedded steel plate positioning bracket provided by the present invention may also have the following feature: the side positioning members located on the corresponding two sides of the bottom frame are symmetrically arranged.

[0012] The pre-embedded steel plate positioning bracket provided by the present invention may also have the following feature: wherein, between the two symmetrically arranged side positioning members, there is a reinforcing bar as an internal reinforcing bar, and the two ends of the internal reinforcing bar are respectively welded to the two corresponding side positioning flat bars.

[0013] Option Two

[0014] This invention also provides a method for installing large-area pre-embedded steel plates in the ground, characterized by the following steps:

[0015] Step S1: Ground compaction. According to the drawing requirements, the ground where the embedded steel plate is to be installed is backfilled and compacted in layers to obtain the ground base layer.

[0016] Step S2, rough leveling and positioning layout: First, the ground base layer is manually leveled, and then the positioning edge lines and corner points are laid out at the predetermined positions above the ground base layer for installing the embedded steel plate.

[0017] Step S3, fabrication of the embedded steel plate positioning bracket: First, on a flat site, according to the dimensions of the embedded steel plate, multiple flat steel bars are welded end to end to form a base frame. Then, according to the ground thickness and drawing requirements, angle steel, flat steel bars serving as side positioning flat steel, and support steel bars serving as corner support steel bars and side support steel bars are cut into pieces. Next, two corner support steel bars are welded to both sides of the inner surface of the angle steel to form corner positioning parts, and two side support steel bars are symmetrically welded to the inner surface of the side positioning flat steel to form side plate positioning parts. Finally, according to the drawing requirements, four corner positioning parts are welded to the four corners of the base frame, and multiple side positioning parts are welded at intervals to the four sides of the base frame, thus obtaining the embedded steel plate positioning bracket.

[0018] Step S4, installation of the pre-embedded steel plate positioning bracket: transport the pre-embedded steel plate positioning bracket to the installation site, and install the pre-embedded steel plate positioning bracket on the ground base according to the positioning edge line and corner point already set in step S2.

[0019] Step S5: Fix the pre-embedded steel plate positioning bracket and use fasteners to fix the bottom frame to the ground base;

[0020] Step S6: Fine-tune the pre-embedded steel plate positioning bracket. Use a hammer to fine-tune the bottom frame, corner positioning parts, or side plate positioning parts that have deviations.

[0021] Step S7, ground concrete pouring: First, support the pouring formwork for the area to be poured, and then pour the concrete according to the drawing requirements.

[0022] Step S8, installation of embedded steel plates: Before the initial setting of the concrete, multiple embedded steel plates are installed sequentially on the embedded steel plate positioning bracket using a combination of machinery and manual labor. The external corners of the embedded steel plates are aligned and coincident with the inner edges of the angle steel, and the side edges of the embedded steel plates are aligned and coincident with the inner edges of the side positioning flat steel. The embedded steel plates are placed on top of the corner support reinforcement and / or the side support reinforcement. The ground concrete is then finished and cured. Finally, after the concrete reaches its strength, the angle steel and side positioning flat steel extending above the ground are cut and ground.

[0023] Step S9, quality inspection: After all the above procedures are completed, the elevation and position of the ground embedded plate will be checked again.

[0024] The large-area ground pre-embedded steel plate installation method provided by the present invention may also have the following features: wherein, in step S3, the fabrication of the pre-embedded steel plate positioning bracket further includes: welding reinforcing steel bars between two adjacent corner positioning parts as peripheral reinforcing steel bars, and welding reinforcing steel bars between two symmetrically arranged side positioning parts as internal reinforcing steel bars.

[0025] In the method for post-installation construction of large-area ground embedded steel plates provided by the present invention, it may further have the following characteristics: Among them, in step S5, the fixing member is a "C"-shaped steel bar.

[0026] In the method for post-installation construction of large-area ground embedded steel plates provided by the present invention, it may further have the following characteristics: Among them, in step S7, during concrete pouring, pour from the middle of the embedded steel plate positioning bracket to both sides, and perform vibration after pouring is completed.

[0027] Compared with the prior art, the advantages of the present invention are as follows:

[0028] (1) For the positioning bracket in the present invention, on the one hand, the structure is simple, and it can be fabricated and welded using waste angle steel, flat steel, and steel bars on the construction site; on the other hand, it is convenient to install on the ground and is also convenient for installing the embedded steel plate, and can well position and fix the embedded steel plate.

[0029] (2) The construction method of the present invention uses the positioning bracket to position and fix the embedded steel plate. First, after the positioning bracket is fixed, the concrete is normally poured, and then the embedded steel plate is installed. It can well ensure the construction quality while not causing damage to the steel plate body, has a low cost, is simple in construction, is not restricted by the site and the size of the steel plate, and has a wide applicability. In addition, after the embedded steel plate is installed, the concrete below it is poured densely, which does not affect the installation of special equipment in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the flowchart of the operation of the method for post-installation construction of large-area ground embedded steel plates in the embodiment of the present invention;

[0031] Figure 2 is the structural schematic diagram of the embedded steel plate positioning bracket in the embodiment of the present invention; and

[0032] Figure 3 is Figure 2 the partial enlarged schematic diagram of part A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will further illustrate the concept, specific structure, and technical effects generated by the present invention in conjunction with the drawings to fully understand the purpose, features, and effects of the present invention.

[0034] <Embodiment>

[0035] Figure 1 is the flowchart of the operation of the method for post-installation construction of large-area ground embedded steel plates in the embodiment of the present invention.

[0036] As Figure 1As shown in the figure, the large-area ground pre-embedded steel plate installation method provided in this embodiment includes the following steps S1 to S9.

[0037] Step S1: Ground compaction. According to the drawing requirements, the ground where the embedded steel plate is to be installed is backfilled and compacted in layers to form the ground base.

[0038] In this embodiment, the ground where the embedded steel plate is to be installed is backfilled and compacted in layers, and the next step of construction can only be carried out after the test is qualified.

[0039] Step S2, rough leveling and positioning layout: First, the ground base layer is manually leveled, and then the positioning edge lines and corner points are laid out at the predetermined positions above the ground base layer for installing the embedded steel plate.

[0040] Specifically, the ground base layer is first leveled manually and inspected with a feeler gauge. Areas that do not meet the requirements are filled with medium and coarse sand. Then, laser infrared + wide line is used to mark the positioning edge lines and corner points at the predetermined positions above the ground base layer for installing the pre-embedded steel plate.

[0041] In this embodiment, the wide lines need to be extended to about 50cm outside the corner points, and the elevation of the ground surface is marked on the steel rods that fix the wide lines.

[0042] Step S3: Fabrication of the pre-embedded steel plate positioning bracket.

[0043] Figure 2 This is a schematic diagram of the pre-embedded steel plate positioning bracket in an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0044] like Figure 2 and Figure 3 As shown, the embedded steel plate positioning bracket 10 in this embodiment is used to position and install multiple embedded steel plates that are sequentially spliced ​​together at predetermined positions above the ground base. The embedded steel plate positioning bracket 10 includes a base frame 11 and a positioning component 12.

[0045] like Figure 2 and Figure 3 As shown, the bottom frame 11 is a rectangular frame that is welded together from multiple flat steel bars 111 and matches the multiple embedded steel plates to be embedded.

[0046] In this embodiment, the flat steel base frame 11 is made of multiple 50×4mm flat steel bars 111 welded together using E43 welding rods.

[0047] like Figure 2 and Figure 3As shown, the positioning component 12 includes four corner positioning members 121 respectively disposed at the four corners of the bottom frame 11, and a plurality of side positioning members 122 disposed at intervals on the four sides of the bottom frame 11.

[0048] Each corner positioning element 121 has an angle steel 121a and two supporting steel bars 121b.

[0049] Angle steel 121a is arranged vertically, and its bottom is welded to the outer edge of the corner of the base frame 11. In this embodiment, the height H1 of angle steel 121a is equal to the ground thickness h (mm) + 50mm.

[0050] Two supporting steel bars 121b are welded to both sides of the inner surface of the angle steel 121a respectively; in this embodiment, the height H2 of the supporting steel bar 121b is equal to the ground thickness (mm) - the thickness of the bottom frame flat steel (mm) - the thickness of the embedded steel plate (mm), and the diameter of the supporting steel bar 121b is ≥12mm.

[0051] The side positioning component 122 has a flat steel 122a and two supporting steel bars 122b.

[0052] The flat steel 122a is arranged vertically, and its bottom is welded to the outer edge of the side of the bottom frame 11. In this embodiment, the height of the flat steel 122a is the same as the height of the angle steel 121a.

[0053] Two supporting reinforcing bars 122b are symmetrically welded to the inner surface of the flat steel 122a; in this embodiment, the height of the supporting reinforcing bars 122b is the same as the height of the supporting reinforcing bars 121b.

[0054] In this embodiment, a reinforcing rib 123 is provided between two adjacent corner positioning members 121, and the two ends of the reinforcing rib 123 are respectively welded to the inner side of the corresponding two angle steels 121a.

[0055] In this embodiment, the side positioning members 122 located on the corresponding two sides of the bottom frame 11 are symmetrically arranged; a reinforcing rib 124 is provided between the two symmetrically arranged side positioning members 122, and the two ends of the reinforcing rib 124 are welded to the inner surfaces of the corresponding two flat steels 122b respectively.

[0056] Specifically, the process of fabricating the pre-embedded steel plate positioning bracket in step S3 includes the following sub-steps:

[0057] Step S3-1: On a flat site, the bottom frame 11 of the pre-embedded steel plate positioning bracket 10 is formed by welding multiple flat steel bars 111 together end to end according to the size of the pre-embedded steel plate.

[0058] In this embodiment, the outer edge dimensions of the manufactured bottom frame 11 should be the same as the dimensions of the multiple embedded steel plates.

[0059] Step S3-2: According to the ground thickness and drawing requirements, cut the angle steel 121a, flat steel 122a, supporting steel bar 121b and supporting steel bar 122b respectively.

[0060] In this embodiment, it is essential to ensure that the ends of the supporting reinforcing bars 121b and 122b are cut flat.

[0061] In step S3-3, two supporting steel bars 121b are welded to both sides of the inner surface of angle steel 121a to form corner positioning parts 121, and two supporting steel bars 122b are symmetrically welded to the inner surface of flat steel 122a to form side positioning parts 122.

[0062] In step S3-4, according to the drawing requirements, the four corner positioning parts 121 are welded to the outer edges of the four corners of the bottom frame 11, and the multiple side positioning parts 122 are welded at intervals to the outer edges of the four sides of the bottom frame 11.

[0063] In this embodiment, during welding, the spacing between the side positioning parts 122 must be ≤750mm, so that each pre-embedded steel plate falls on the positioning parts on both sides, and there are at least 2 positioning parts on each side.

[0064] In steps S3-5, reinforcing steel bars 123 are welded between two adjacent corner positioning pieces 121, and reinforcing steel bars 124 are welded between two symmetrically arranged side positioning pieces 122, thereby obtaining the embedded steel plate positioning bracket 10. In this embodiment, both reinforcing steel bars 123 and 124 are located below the top surfaces of supporting steel bars 121b and 122b to avoid affecting the installation of the embedded steel plate.

[0065] Step S4: Install the pre-embedded steel plate positioning bracket. Transport the pre-embedded steel plate positioning bracket 10 to the installation site. Install the pre-embedded steel plate positioning bracket 10 on the ground base using the positioning edges and corners that have been set in step S2.

[0066] In this embodiment, the elevation of the supporting steel bar 121b in the corner positioning component 121 and the supporting steel bar 122b in the side positioning component 122 should meet the requirement of "ground thickness - embedded steel plate thickness"; if there is an error, the ground base layer should be adjusted.

[0067] Step S5: Fix the pre-embedded steel plate positioning bracket and use the fastener 13 to fix the bottom frame 11 to the ground base.

[0068] In this embodiment, the fixing member 13 is a "C"-shaped steel bar with a width of the width of the flat steel 111 + 10 mm, and the height of the vertical segments on both sides is 15 cm. Use a hammer to strike the fixing member 13 to fix the flat steel 111 of the bottom frame 11 to the ground base layer. The fixing members 13 around the bottom frame 11 need to be struck symmetrically, and the arrangement spacing of the fixing members 13 is 1 m.

[0069] Step S6, fine-tuning of the embedded steel plate positioning bracket. Use a hammer to fine-tune the deviated bottom frame 11, corner positioning member 121 or side plate positioning member 122.

[0070] Step S7, pouring of ground concrete. First, support the pouring formwork for the ground area to be poured, and then pour the concrete according to the requirements of the drawing.

[0071] In this embodiment, before the concrete pouring, it is necessary to re-check the elevation of the support steel bars 121b and 122b. If there is an error, adjust it in time; when pouring the concrete, pour from the middle of the embedded steel plate positioning bracket 10 to both sides, and vibrate after pouring.

[0072] Step S8, installation of the embedded steel plate. First, before the concrete initial setting, use machinery and manual labor to install multiple embedded steel plates on the embedded steel plate positioning bracket 10 in sequence, so that the outer corner of the embedded steel plate is tightly attached and coincides with the inner side line of the angle steel 121a, the side line of the embedded steel plate is tightly attached and coincides with the inner side line of the flat steel 122a in the side positioning member, and the embedded steel plate is placed on the top of the support steel bar 121b in the corner positioning member 121 and / or the support steel bar 122b in the side positioning member 122; then finish and maintain the ground concrete; finally, after the concrete reaches the strength, cut and polish the angle steel 121a and flat steel 122b extending out of the ground.

[0073] Step S9, quality inspection. After all the above processes are completed, re-check the elevation and position of the embedded steel plate.

[0074] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention.

Claims

1. A positioning bracket for embedded steel plates, used for positioning and installing multiple embedded steel plates that are sequentially spliced ​​together, characterized in that... include: The bottom frame is a rectangular frame that matches the multiple pre-embedded steel plates; as well as The positioning component includes four corner positioning members respectively disposed at the four corners of the bottom frame, and a plurality of side positioning members spaced apart at the four sides of the bottom frame. The bottom frame is constructed by welding multiple flat steel bars together end to end. Each of the corner positioning components has an angle steel and two supporting steel bars as corner supporting steel bars. The bottom of the angle steel is welded to the corner of the base frame. The two corner support steel bars are respectively welded to both sides of the inner surface of the angle steel. Each of the aforementioned side positioning members has a flat steel serving as a side positioning flat steel and two supporting steel bars serving as side supporting steel bars. The bottom of the side positioning flat steel is welded to the side of the bottom frame. The two side support reinforcing bars are symmetrically welded to the inner surface of the side positioning flat steel. The corner support steel bars and the side support steel bars have the same height, and both are less than the height of the angle steel and the side positioning flat steel.

2. The pre-embedded steel plate positioning bracket according to claim 1, characterized in that: in, The angle steel is located at the outer edge of the corner of the bottom frame. The side positioning flat steel is located at the outer edge of the side of the bottom frame.

3. The pre-embedded steel plate positioning bracket according to claim 1, characterized in that: in, Reinforcing bars are installed between two adjacent corner positioning components as peripheral reinforcement. The two ends of the peripheral reinforcing bars are respectively welded to the two corresponding angle steels.

4. The pre-embedded steel plate positioning bracket according to claim 1, characterized in that: in, The side positioning elements located on the corresponding two sides of the bottom frame are symmetrically arranged.

5. The pre-embedded steel plate positioning bracket according to claim 4, characterized in that: in, A reinforcing bar, serving as internal reinforcing steel, is provided between the two symmetrically arranged side positioning members. The two ends of the internal reinforcing steel bar are respectively welded to the two corresponding side positioning flat steel bars.

6. A construction method for pre-embedding steel plates in a large area of ​​the ground and then installing them, characterized in that, Includes the following steps: Step S1: Ground compaction. According to the drawing requirements, the ground where the embedded steel plate is to be installed is backfilled and compacted in layers to form the ground base. Step S2, rough leveling and positioning layout: First, the ground base layer is manually leveled, and then the positioning edge lines and corner points are laid out at the predetermined positions above the ground base layer for installing the embedded steel plate. Step S3, fabrication of the embedded steel plate positioning bracket. First, on a flat site, a bottom frame is formed by welding the ends of multiple flat steels together according to the size of the embedded steel plate; then, according to the ground thickness and the requirements of the drawing, the angle steels, the flat steels as the side positioning flat steels, and the support steels as the corner support steel bars and side support steel bars are cut; next, the two corner support steel bars are respectively welded on both sides of the inner surface of the angle steel to form corner positioning members, and the two side support steel bars are symmetrically welded on the inner surface of the side positioning flat steel to form side positioning members; finally, according to the requirements of the drawing, the four corner positioning members are respectively welded at the four corners of the bottom frame, and multiple side positioning members are welded at the four sides of the bottom frame at intervals, thus obtaining the embedded steel plate positioning bracket; Step S4, installation of the embedded steel plate positioning bracket. Transport the fabricated embedded steel plate positioning bracket to the installation site, and install the embedded steel plate positioning bracket on the ground base through the positioning border lines and corner points placed in Step S2; Step S5, fixation of the embedded steel plate positioning bracket. Use fasteners to fix the bottom frame to the ground base; Step S6, fine adjustment of the embedded steel plate positioning bracket. Use a hammer to finely adjust the deviated bottom frame, corner positioning member or side plate positioning member; Step S7, pouring of ground concrete. First, support the pouring formwork for the ground area to be poured, and then pour the concrete according to the requirements of the drawing; Step S8, installation of the embedded steel plate. Before the concrete starts to set, first use machinery and manual labor to sequentially install multiple embedded steel plates on the embedded steel plate positioning bracket, making the outer corners of the embedded steel plate closely adhere to and coincide with the inner border lines of the angle steel, the side border lines of the embedded steel plate closely adhere to and coincide with the inner border lines of the side positioning flat steel, and making the embedded steel plate fall on the top of the corner support steel bars and / or side support steel bars; then finish the surface of the ground concrete and perform maintenance; finally, after the concrete reaches the strength, cut and polish the angle steel and side positioning flat steel extending out of the ground; Step S9, quality inspection. After all the above processes are completed, recheck the elevation and position of the ground embedded plate.

7. The post-installation construction method for large-area ground embedded steel plates according to claim 6, wherein: in, In Step S3, the fabrication of the embedded steel plate positioning bracket further includes: welding reinforcing steel bars between two adjacent corner positioning members as peripheral reinforcing steel bars, and welding reinforcing steel bars between two symmetrically arranged side positioning members as internal reinforcing steel bars.

8. The post-installation construction method for large-area ground embedded steel plates according to claim 6, wherein: in, In Step S5, the fastener is a "U"-shaped steel bar.

9. The post-installation construction method for large-area ground embedded steel plates according to claim 6, wherein: in, In Step S7, when pouring the concrete, pour from the middle of the embedded steel plate positioning bracket to both sides, and perform vibration after pouring.

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