Pre-embedded steel plate positioning bracket and post-installation construction method for pre-embedding steel plate on large-area ground

Abstract

The invention provides a pre-embedded steel plate positioning support and a construction method for mounting a large-area ground pre-embedded steel plate. The positioning support comprises a bottom frame which is a rectangular frame body matched with a plurality of embedded steel plates; the positioning component comprises four corner positioning pieces arranged at the four corners of the bottom frame respectively and a plurality of side edge positioning pieces arranged at the four side edges of the bottom frame at intervals, the bottom frame is formed by welding a plurality of pieces of bottom frame flat steel end to end, each corner positioning piece is provided with angle steel and two corner supporting steel bars, and the angle steel and the two corner supporting steel bars are mutually welded. The bottom of the angle steel is welded to the corner of the bottom frame, the two corner supporting steel bars are welded to the two sides of the inner surface of the angle steel respectively, each side edge positioning piece is provided with side edge positioning flat steel and two side edge supporting steel bars, and the bottom of the side edge positioning flat steel is welded to the side edge of the bottom frame. The two side edge supporting steel bars are symmetrically welded to the inner surface of the side edge positioning flat steel, and the corner supporting steel bars and the side edge supporting steel bars are the same in height and both smaller than the angle steel and the side edge positioning flat steel.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, and in particular relates to a pre-buried steel plate positioning bracket and a post-installation construction method for pre-buried steel plates on a large area of ​​ground. Background Art

[0002] Ground embedded steel plates play an important role in building and infrastructure construction, and the embedded steel plate fixing method is a technology commonly used in building construction. By embedding steel plates in concrete components, effective fixation and support are provided to ensure air stability and reliability. Embedded steel plates and embedded parts are not only widely used in traditional high-rise buildings, bridges, and industrial plants, but also have great potential in emerging fields with the development of science and technology.

[0003] However, in the conventional installation of embedded parts, the embedded parts are usually welded to the steel bars in the concrete components, and large bolt embedded parts are positioned, adjusted and fixed by positioning plates. In the plain concrete floor structure, if the installation space is sufficient, the plain concrete is poured in two times. The first time is to pour a thin layer of concrete to fix the anchor claws of the embedded parts. After the pouring is completed, the concrete is poured to the ground elevation and finally vibrated and maintained.

[0004] For large embedded parts that are seamlessly assembled from multiple embedded parts, and the ground space that can be installed is small, if the ground embedded parts are installed according to the traditional construction method, the density of the concrete under the embedded steel plate cannot be guaranteed. At the same time, the installation accuracy of the embedded parts is high, because the embedded parts are installed with special equipment in the later stage, and air holes are not allowed to be opened on the embedded steel plate. If the interior of the embedded steel plate is filled according to the high-pressure grouting process, the grouting material needs to be modified, and at the same time, there will be pressure to disturb the fixed embedded steel plate, so that the installation accuracy cannot meet the requirements. In addition, the traditional construction process will cause the concrete under the embedded steel plate to be not dense, which poses a quality risk; secondary grouting requires changing the ground material, which increases the construction cost and also poses certain quality risks. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a pre-buried steel plate positioning bracket and a post-installation construction method for pre-buried steel plates on a large area of ​​ground.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] <Option 1>

[0008] The present invention provides a pre-embedded steel plate positioning bracket, which is used for positioning and installing a plurality of pre-embedded steel plates spliced ​​together in sequence, and has the following characteristics: a bottom frame, which is a rectangular frame body matching the plurality of pre-embedded steel plates; and a positioning component, which comprises four corner positioning pieces respectively arranged at the four corners of the bottom frame, and a plurality of side positioning pieces arranged at intervals at the four sides of the bottom frame, wherein the bottom frame is formed by welding a plurality of flat steels as the bottom frame flat steels end to end to each other, each corner positioning piece has an angle steel and two supporting steel bars as corner supporting steel bars, the bottom of the angle steel is welded at the corner of the bottom frame, and the two corner supporting steel bars are respectively welded at both sides of the inner surface of the angle steel, each side positioning piece has a flat steel as a side positioning flat steel and two supporting steel bars as side supporting steel bars, the bottom of the side positioning flat steel is welded at the side of the bottom frame, and the two side supporting steel bars are symmetrically welded to the inner surface of the side positioning flat steel, and the heights of the corner supporting steel bars and the side supporting steel bars are the same and are both smaller than the heights of the angle steel and the side positioning flat steel.

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

[0010] The embedded steel plate positioning bracket provided by the present invention may also have the following features: wherein, reinforcing steel bars are provided between two adjacent corner positioning pieces as peripheral reinforcing steel bars, and the two ends of the peripheral reinforcing steel bars are respectively welded to the corresponding two angle steels.

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

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

[0013] <Option 2>

[0014] The present invention also provides a large-area ground embedded steel plate post-installation construction method, which has the following characteristics and comprises the following steps:

[0015] Step S1, ground compaction: according to the requirements of the drawings, the ground where the embedded steel plate is to be installed is backfilled and compacted in layers to obtain a ground base;

[0016] Step S2, rough leveling and positioning and laying out, first manually leveling the ground base, and then laying out the positioning edge lines and corner points for installing the embedded steel plate at a predetermined position above the ground base;

[0017] Step S3, the embedded steel plate positioning bracket is made. First, on a flat site, according to the size of the embedded steel plate, multiple flat steels are used as the bottom frame, and the flat steels are welded end to end to each other to form a bottom frame; then, according to the ground thickness and the requirements of the drawings, the angle steel, the flat steel used as the side positioning flat steel, and the supporting steel bars used as the corner support steel bars and the side support steel bars are cut; then, the two corner support steel bars are respectively welded to the two sides of the inner surface of the angle steel to form a corner positioning piece, and the two side support steel bars are symmetrically welded to the inner surface of the side positioning flat steel to form a side plate positioning piece; finally, according to the requirements of the drawings, the four corner positioning pieces are respectively welded to the four corners of the bottom frame, and the multiple side positioning pieces are welded to the four sides of the bottom frame at intervals, so as to obtain the embedded steel plate positioning bracket;

[0018] Step S4, installing the embedded steel plate positioning bracket, transporting the prepared embedded steel plate positioning bracket to the installation site, and installing the embedded steel plate positioning bracket on the ground base through the positioning edge lines and corner points that have been placed in step S2;

[0019] Step S5, fix the embedded steel plate positioning bracket, and use fixing parts to fix the bottom frame to the ground base;

[0020] Step S6, fine-tuning the embedded steel plate positioning bracket, using a hammer to fine-tune the deviated bottom frame or corner positioning piece or side plate positioning piece;

[0021] Step S7, pouring ground concrete, first support the pouring template for the ground area to be poured, and then pour concrete according to the requirements of the drawing;

[0022] Step S8, installation of embedded steel plates. Before the initial setting of concrete, a plurality of embedded steel plates are installed on the embedded steel plate positioning bracket in sequence by using machinery and manual labor, so that the positive angle of the embedded steel plate is closely attached to and overlaps with the inner edge line of the angle steel, the side line of the embedded steel plate is closely attached to and overlaps with the inner edge line of the side positioning flat steel, and the embedded steel plate falls on the top of the corner support steel bar and / or the side support steel bar; then the ground concrete is finished and cured; finally, after the concrete reaches the required strength, the angle steel and the side positioning flat steel extending out of the ground are cut and polished;

[0023] Step S9, quality inspection: after all the above processes are completed, the elevation and position of the ground embedded plate are reviewed.

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

[0025] In the method for post-installing pre-embedded steel plates on a large-area ground 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-installing pre-embedded steel plates on a large-area ground 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 pre-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 not only convenient to install on the ground but also convenient to install the pre-embedded steel plate, and can well position and fix the pre-embedded steel plate.

[0029] (2) The construction method of the present invention uses the positioning bracket to position and fix the pre-embedded steel plate. First, after the positioning bracket is fixed, the concrete is normally poured, and then the pre-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 pre-embedded steel plate is installed, the concrete below it is poured densely, without affecting the installation of special equipment in the later stage. Description of the Drawings

[0030] Figure 1 is the operation flow chart of the method for post-installing pre-embedded steel plates on a large-area ground in the embodiment of the present invention;

[0031] Figure 2 is the structural schematic diagram of the pre-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 Embodiments

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

[0034] <Embodiment>

[0035] Figure 1 is the operation flow chart of the method for post-installing pre-embedded steel plates on a large-area ground in the embodiment of the present invention.

[0036] As Figure 1As shown, the large-area ground pre-buried steel plate post-installation construction 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 a 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 be carried out only after passing the inspection.

[0039] Step S2, rough leveling and positioning and laying out, first manually leveling the ground base, and then laying out the positioning edges and corner points for installing the embedded steel plate at a predetermined position above the ground base.

[0040] Specifically, the ground base is first manually leveled and tested with a feeler gauge, and the parts that do not meet the requirements are filled with medium and coarse sand; then laser infrared + wide-angle light is used to release the positioning edges and corner points for installing the embedded steel plates at the predetermined position above the ground base.

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

[0042] Step S3, manufacturing the embedded steel plate positioning bracket.

[0043] Figure 2 is a structural schematic diagram of a pre-buried steel plate positioning bracket in an embodiment of the present invention; Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A.

[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 spliced ​​together in sequence at a predetermined position above the ground base. The embedded steel plate positioning bracket 10 includes a bottom frame 11 and a positioning component 12.

[0045] like Figure 2 and Figure 3 As shown, the bottom frame 11 is a rectangular frame formed by welding a plurality of flat steels 111 to match a plurality of embedded steel plates to be embedded.

[0046] In this embodiment, the flat steel bottom frame 11 is formed by welding a plurality of 50×4 mm flat steels 111 together using E43 welding rods.

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

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

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

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

[0051] The side positioning member 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 support steel bars 122b are symmetrically welded to the inner surface of the flat steel 122a; in this embodiment, the height of the support steel bars 122b is the same as the height of the support steel bars 121b.

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

[0055] In this embodiment, the side positioning members 122 respectively located on the two corresponding side edges 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 respectively welded to the inner side surfaces of the corresponding two flat steels 122b.

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

[0057] Step S3-1, on a flat ground, a plurality of flat steels 111 are welded end to end according to the size of the embedded steel plate to form a bottom frame 11 of the embedded steel plate positioning bracket 10.

[0058] In this embodiment, it should be ensured that the outer edge size of the manufactured bottom frame 11 is the same as the size of the plurality of embedded steel plates.

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

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

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

[0062] Step S3 - 4 , according to the requirements of the drawings, four corner positioning members 121 are respectively welded to the outer edges of the four corners of the bottom frame 11 , and a plurality of side positioning members 122 are welded to the outer edges of the four sides of the bottom frame 11 at intervals.

[0063] In this embodiment, the spacing between the side positioning members 122 must be ≤750 mm during welding, thereby ensuring that at least two sides of each embedded steel plate fall on the positioning members and that there are at least two positioning members on each side.

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

[0065] Step S4, installing the embedded steel plate positioning bracket, transporting the manufactured embedded steel plate positioning bracket 10 to the installation site, and installing the embedded steel plate positioning bracket 10 on the ground base using the positioning edges and corner points that have been placed in step S2.

[0066] In this embodiment, the elevations of the support steel bars 121b in the corner positioning member 121 and the support steel bars 122b in the side positioning member 122 should meet the requirements of "ground thickness - embedded steel plate thickness"; if there is an error, the ground base layer is adjusted.

[0067] Step S5, the embedded steel plate positioning bracket is fixed, and the bottom frame 11 is fixed to the ground base using the fixing member 13.

[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 sections 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 layout 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 bottom frame 11 with deviation, the corner positioning member 121 or the 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; during the concrete pouring, 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 sets, use machinery and manual labor to sequentially install multiple embedded steel plates on the embedded steel plate positioning bracket 10, so that the outer corner of the embedded steel plate is closely attached and coincides with the inner edge line of the angle steel 121a, the side line of the embedded steel plate is closely attached and coincides with the inner edge 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 of the corner positioning member 121 and / or the support steel bar 122b in the side positioning member 122; then finish and cure the ground concrete; finally, after the concrete reaches the strength, cut and polish the angle steel 121a and the flat steel 122b protruding from 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 pre-embedded steel plate positioning bracket, used for positioning and installing a plurality of pre-embedded steel plates spliced ​​together in sequence, characterized in that: include: The bottom frame is a rectangular frame matching the plurality of embedded steel plates; as well as The positioning component comprises four corner positioning members respectively arranged 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 formed by welding a plurality of flat steels end to end as the bottom frame flat steels. Each of the corner positioning members has an angle steel and two supporting steel bars as corner supporting steel bars. The bottom of the angle steel is welded at the corner of the bottom frame. The two corner support steel bars are welded to both sides of the inner surface of the angle steel. Each of the side positioning members has a flat steel bar as a side positioning flat steel bar and two supporting steel bars 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 steel 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 are both smaller than the heights of the angle steel and the side positioning flat steel.

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

3. The embedded steel plate positioning bracket according to claim 1, characterized in that: in, Reinforced steel bars are provided between two adjacent corner positioning pieces as peripheral reinforcement bars. The two ends of the peripheral reinforcement steel bars are respectively welded to the corresponding two angle steels.

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

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

6. A method for post-installation construction of large-area ground embedded steel plates, characterized in that: The following steps are involved: Step S1, ground compaction: according to the requirements of the drawings, the ground where the embedded steel plate is to be installed is backfilled and compacted in layers to form a ground base; Step S2, rough leveling and positioning and laying out, first manually leveling the ground base, and then laying out the positioning edge lines and corner points for installing the embedded steel plate at a predetermined position above the ground base; 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 steel angles, the flat steels serving as side positioning flat steels, and the support steels serving as corner support steels and side support steels are cut. Next, the two corner support steels are respectively welded to both sides of the inner surface of the steel angle to form corner positioning members, and the two side support steels are symmetrically welded to the inner surface of the side positioning flat steel to form side plate positioning members. Finally, according to the requirements of the drawing, the four corner positioning members are respectively welded to the four corners of the bottom frame, and multiple side positioning members are welded to 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. The fabricated embedded steel plate positioning bracket is transported to the installation site, and the embedded steel plate positioning bracket is installed on the ground base through the positioning border lines and corner points laid in Step S2. Step S5, fixation of the embedded steel plate positioning bracket. Fixing parts are used to fix the bottom frame to the ground base. Step S6, fine adjustment of the embedded steel plate positioning bracket. A hammer is used to finely adjust the deviated bottom frame, corner positioning member or side plate positioning member. Step S7, pouring of ground concrete. First, the pouring formwork is supported for the ground area to be poured, and then the concrete is poured according to the requirements of the drawing. Step S8, installation of the embedded steel plate. Before the concrete begins to set, multiple embedded steel plates are successively installed on the embedded steel plate positioning bracket by means of machinery and manual labor, so that the outer corners of the embedded steel plate are closely attached to and coincide with the inner border lines of the steel angles, the side border lines of the embedded steel plate are closely attached to and coincide with the inner border lines of the side positioning flat steels, and the embedded steel plate is placed on the top of the corner support steel and / or side support steel. Then, the ground concrete is troweled and cured. Finally, after the concrete reaches the required strength, the steel angles and side positioning flat steels protruding above the ground are cut and polished. Step S9, quality inspection. After all the above processes are completed, the elevation and position of the ground embedded plate are rechecked.

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

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

9. The post-installation construction method for large-area ground embedded steel plates according to claim 6, characterized in that: in, In Step S7, during the concrete pouring, the pouring is carried out from the middle of the embedded steel plate positioning bracket to both sides, and vibration is carried out after the pouring is completed.

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