Cantilever I-shaped steel anchoring structure of fabricated floor slab and construction method of cantilever I-shaped steel anchoring structure

Abstract

The invention relates to the technical field of anchoring structures, and provides a cantilever I-shaped steel anchoring structure of an assembly type floor slab aiming at the situation that when I-shaped steel is fixed on a composite floor slab through an anchoring structure traditionally, the composite floor slab is prone to damage, and the cantilever I-shaped steel anchoring structure of the assembly type floor slab comprises an anchoring component, a pressing plate and a plurality of fastening nuts; the anchoring component comprises two threaded sleeves, and the top ends of the threaded sleeves are in threaded connection with connecting screws; the threaded sleeve and the bottom end of the connecting screw rod are both pre-buried in the composite floor slab; the pressing plate is provided with two connecting holes corresponding to the two connecting screw rods, and the pressing plate sleeves the two connecting screw rods through the two connecting holes; and the fastening nut is in threaded connection with the top of the connecting screw rod. The anchoring structure has the effect of limiting damage to the composite floor slab when the I-shaped steel is fixed through the anchoring structure.

Description

Technical Field

[0001] The present application relates to the field of anchoring structures, and in particular to a cantilevered I-beam anchoring structure of a prefabricated floor slab and a construction method thereof. Background Art

[0002] When installing a cantilever scaffolding structure on a building, it is necessary to fix the fixed end of the cantilever I-beam to the floor slab through an anchoring structure. In the related art, the anchoring structure includes an anchoring member, a pressure plate, and a number of fastening nuts, wherein the anchoring member is usually a U-shaped bolt; the pressure plate has two through holes corresponding to the two vertical sections of the U-shaped bolt.

[0003] During the specific construction, it is necessary to first drill holes in the floor slab for the two vertical sections of the U-shaped bolt to pass through, then pass the vertical section of the U-shaped bolt through the holes from bottom to top in the floor slab, and after placing the I-beam between the two vertical sections of the U-shaped bolt, insert the pressure plate into the two vertical sections of the U-shaped bolt through two through holes, and finally screw the fastening nut into the two vertical sections of the U-shaped bolt to cooperate with the pressure plate and the U-shaped bolt to press the I-beam tightly and fix it on the floor slab.

[0004] At present, when I-beams are installed and fixed on prefabricated floors such as composite floors through anchor structures, drilling holes directly on the composite floors will cause great damage to the structure of the composite floors, seriously affecting the integrity of the composite floors. After the U-shaped bolts on the floors are removed, the remaining holes in the composite floors need to be repaired, which is a cumbersome operation, and the repaired holes are very likely to leave water leakage hazards. Therefore, there is room for improvement. Summary of the invention

[0005] In order to reduce the damage to the composite floor slabs that may be easily caused when the I-beams are fixed to the composite floor slabs by anchoring structures, the present application provides a cantilevered I-beam anchoring structure of a prefabricated floor slab and a construction method thereof.

[0006] The present application provides a cantilevered I-beam anchoring structure of a prefabricated floor slab, which adopts the following technical solution: A cantilevered I-beam anchoring structure of an assembled floor slab, comprising an anchoring member, a pressing plate and a plurality of fastening nuts; The anchoring member comprises two threaded sleeves, the top ends of the threaded sleeves are threadedly connected with connecting screws; the bottom ends of the threaded sleeves and the connecting screws are pre-buried in the composite floor slab; The pressing plate is provided with two connection holes corresponding to the two connection screws, and the pressing plate is sleeved on the two connection screws through the two connection holes; The fastening nut is threadedly connected to the top of the connecting screw.

[0007] By adopting the above technical scheme, when installing the I-beam, the I-beam is placed between the two connecting screws pre-buried in the composite floor slab, and the pressure plate is inserted into the two connecting screws through the two connecting holes, and finally the fastening nut is screwed into the top of the connecting screw and tightened, so that the pressure plate presses the I-beam, and the I-beam is fixed to the composite floor slab through the anchoring structure. Compared with the traditional installation method of fixing the I-beam through the anchoring member, since the anchoring member is pre-buried in the composite floor slab in advance, there is no need to drill holes in the composite floor slab during the subsequent installation process, which effectively limits the situation where the composite floor slab is easily damaged when the I-beam is fixed by the anchoring structure.

[0008] Preferably, the top end and the bottom end of the threaded sleeve are coaxially connected with an annular water-stop wing ring.

[0009] By adopting the above technical scheme, the annular water-stop wing ring can be used to extend the path for external water vapor to enter the interior of the composite floor through the gap at the junction of the threaded sleeve and the composite floor, thereby reducing the situation where the internal steel structure of the composite floor is corroded and damaged by external water vapor.

[0010] Preferably, the anchoring member further comprises a U-shaped rod, the U-shaped rod is pre-buried in the composite floor slab, the U-shaped rod comprises two vertical sections, and the bottom ends of the two threaded sleeves are respectively threadedly sleeved on the two vertical sections of the U-shaped rod.

[0011] By adopting the above technical solution, the U-shaped rod can be used to limit the connection of the two threaded sleeves, which is beneficial to improving the connection integrity and pull-out resistance of the two threaded sleeves. At the same time, it limits the displacement and deformation of the threaded sleeves after subsequent external loads act on the two threaded sleeves.

[0012] Preferably, the U-shaped rod is fixed to the steel bar structure in the composite floor slab by welding.

[0013] By adopting the above technical scheme, on the one hand, the U-shaped rod and the two threaded sleeves can be firmly supported in the composite floor slab, which is conducive to reducing the displacement of the U-shaped rod during the pouring construction of the composite floor slab; on the other hand, the subsequent external load acting on the anchoring member can be promptly transmitted and dispersed to the steel structure of the composite floor slab, reducing the external load from being concentrated on the U-shaped rod and the threaded sleeve for a long time, which makes the U-shaped rod and the threaded sleeve easily deformed and damaged.

[0014] Preferably, a construction method of the cantilevered I-beam anchoring structure of the assembled floor as described above comprises the following steps: S1: Pre-embedded anchoring components: two threaded sleeves and the bottom ends of two connecting screws are pre-embedded in the composite floor slab; S2: I-beam fixing: Move the I-beam between the two connecting screws, insert the pressure plate into the two connecting screws through the two through holes, and finally screw the fastening nut into the top of the connecting screw; S3: I-beam removal: Remove the fastening nut and pressure plate at the top of the connecting screw, and remove the I-beam from between the two connecting screws; S4: Removal of connecting screw: Remove the connecting screw from the corresponding threaded sleeve.

[0015] By adopting the above technical scheme, by pre-embedding the anchoring member in the composite floor slab in advance, when the I-beam is installed later, the I-beam is placed between two connecting screws pre-embedded in the composite floor slab, the pressure plate is inserted into the two connecting screws, and the fastening nut is screwed into the top of the connecting screw, then the I-beam can be fixed on the composite floor slab. Since the anchoring member is pre-embedded in the composite floor slab in advance, there is no need to drill holes in the composite floor slab during the installation and construction process, which effectively limits the damage to the composite floor slab caused by the process of fixing the I-beam through the anchoring structure.

[0016] Preferably, the specific steps of step S1 are as follows: S1.1: Embedding of threaded sleeves: embed two threaded sleeves in the precast slab layer of the composite floor; S1.2: Pre-embedded connecting screws: Before pouring the cast-in-place slab layer of the composite floor, screw the connecting screws into the corresponding threaded sleeves.

[0017] By adopting the above technical solution, the threaded sleeve is pre-buried in the prefabricated board layer in advance during the prefabricated board layer production stage. After the prefabricated board layer is fixed at the subsequent construction site, the connecting screw is screwed into the corresponding threaded sleeve to complete the installation of the anchor component, which is conducive to saving on-site operation time.

[0018] Preferably, the method further comprises the following steps: S5: Inject epoxy resin slurry into the inside of the threaded sleeve and into the holes left on the cast-in-place slab after the connecting screw is removed.

[0019] By adopting the above technical solution, epoxy resin is used to fill the internal cavity of the threaded sleeve and the holes left by the connecting screw to prevent the occurrence of concave and uneven surfaces on the cast-in-place slab layer of the subsequent composite floor.

[0020] Preferably, grouting holes are opened on the outer periphery of the top of the threaded sleeve, and the grouting holes are filled with flexible blocking blocks; In step S5, before injecting epoxy resin slurry into the threaded sleeve, the flexible blocking block is removed from the grouting hole.

[0021] By adopting the above technical solution, during the pouring process of the cast-in-place slab, it is easy to cause a gap between the concrete structure of the cast-in-place slab and the threaded sleeve due to the shrinkage of the concrete itself during the hardening process and insufficient vibration. Through the setting of the grouting hole, the concrete slurry subsequently injected into the threaded sleeve can penetrate into the gap between the cast-in-place slab and the threaded sleeve through the grouting hole to achieve the blocking of the gap, which is conducive to further limiting the subsequent external water vapor from penetrating into the interior of the composite floor through the gap between the composite floor and the threaded sleeve. Through the setting of the flexible blocking block, before pouring epoxy resin into the threaded sleeve, the grouting hole is blocked with a flexible buffer block to limit the concrete from entering the threaded sleeve through the grouting hole during the pouring of the cast-in-place slab of the composite floor.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By pre-embedding two threaded sleeves and two connecting screws in the composite floor in advance, in the subsequent process of fixing the I-beam through the anchor structure, the pressure plate and the fastening bolts can directly cooperate with the anchor member to fix the I-beam on the composite floor, without the need to drill holes in the composite floor, effectively reducing the damage to the composite floor caused by fixing the I-beam through the anchor structure.

[0023] 2. By pre-embedding the threaded sleeve in the prefabricated board layer in advance, after the prefabricated board layer of the composite floor is installed and fixed, the connecting screw is screwed into the corresponding threaded sleeve, and the installation construction of the anchoring component can be completed, which is conducive to saving on-site operation time.

[0024] 3. By welding and fixing the U-shaped rod to the steel structure of the composite floor, the external load acting on the anchor member can be dispersed to the steel structure inside the composite floor in time through the U-shaped rod, which is conducive to reducing the external load acting on the anchor member for a long time, causing the anchor member to be easily deformed and damaged.

[0025] 4. By opening a grouting hole on the outer periphery of the top of the threaded sleeve, when filling materials such as epoxy resin are subsequently poured into the threaded sleeve, the filling material can penetrate into the gap between the threaded sleeve and the rubber layer of the composite floor through the grouting hole to fill the gap, which is beneficial to limit the subsequent external water vapor from penetrating into the interior of the composite floor through the gap between the threaded sleeve and the cast-in-place slab layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram used to illustrate the anchoring structure in an embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0028] Figure 3It is a schematic diagram of an embodiment of the present application for illustrating the state of pre-embedded U-shaped rods and threaded sleeves in a prefabricated board layer.

[0029] Figure 4 It is a schematic diagram of an embodiment of the present application used to illustrate the state of screwing a connecting screw into a threaded sleeve.

[0030] Figure 5 It is a schematic diagram of the state of the cast-in-place slab layer used to illustrate the casting of the composite floor slab in an embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of an embodiment of the present application for illustrating the state of screwing the connecting screw out of the threaded sleeve.

[0032] Description of reference numerals: 1. Composite floor; 11. Prefabricated slab; 12. Cast-in-place slab; 20. U-shaped rod; 201. Vertical section; 21. Threaded sleeve; 211. Annular water stop wing ring; 212. Grouting hole; 213. Flexible blocking block; 22. Connecting screw; 23. Pressure plate; 24. Fastening nut; 3. I-beam. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] Reference Figure 1 The existing composite floor slab 1 structure includes a precast slab layer 11 and a cast-in-place slab layer 12, wherein the precast slab layer 11 is precast in advance in a factory, and the cast-in-place slab layer 12 is cast on the precast slab layer 11 after the precast slab layer 11 is fixed in place.

[0035] The embodiments of the present application disclose a cantilevered I-beam anchoring structure of an assembled floor slab and a construction method thereof.

[0036] A cantilevered I-beam anchor structure for assembled floor slabs, referring to Figure 1 and Figure 2 , including an anchoring member, a pressure plate 23 and a plurality of fastening nuts 24; the anchoring member includes a U-shaped rod 20, two threaded sleeves 21 and two connecting screws 22, the two threaded sleeves 21 are respectively threadedly sleeved on the two vertical sections 201 of the U-shaped rod 20; the two connecting screws 22 are respectively threadedly connected to the top of the two threaded sleeves 21; the U-shaped rod 20, the two threaded sleeves 21 and the bottom ends of the two connecting screws 22 are all pre-buried in the composite floor 1; the pressure plate 23 is provided with two connecting holes corresponding to the two connecting screws 22, and the pressure plate 23 is sleeved on the two connecting screws 22 through the two connecting holes; a plurality of fastening nuts 24 are respectively threadedly connected to the top of the two connecting screws 22.

[0037] When the I-beam 3 is installed later, the I-beam 3 is directly placed between the two pre-buried connecting screws 22, and the pressure plate 23 is inserted into the two connecting screws 22 through the two connecting holes. The fastening nut 24 is screwed into the top of the connecting screw 22 and gradually tightened to make the pressure plate 23 press the I-beam 3, so that the I-beam 3 is firmly fixed on the composite floor 1 through the anchoring structure.

[0038] Reference Figure 1 and Figure 2 The U-shaped rod 20 is welded and fixed to the steel structure inside the prefabricated panel layer 11 of the composite floor 1, so that the external load acting on the anchoring member in the future can be promptly dispersed to the steel structure inside the prefabricated panel layer 11, which is beneficial to reduce the external load concentrated on the anchoring member, causing the various components of the anchoring member to be easily deformed and damaged.

[0039] Reference Figure 1 and Figure 2 The threaded sleeve 21 is provided with two annular water-stop wing rings 211, which are respectively located at the two ends of the threaded sleeve 21, and the two annular water-stop wing rings 211 are sleeved and welded and fixed on the outer periphery of the threaded sleeve 21. By providing the annular water-stop wing rings 211 at the two ends of the threaded sleeve 21, the annular water-stop wing rings 211 can be used to extend the external water vapor to penetrate into the composite floor 1 through the gap between the threaded sleeve 21 and the composite floor 1, which is conducive to reducing the situation where the internal steel structure of the composite floor 1 is corroded by the external water vapor.

[0040] A grouting hole 212 is also provided on the outer periphery of the top of the threaded sleeve 21 , and the grouting hole 212 is filled with a flexible sealing block 213 . In this example, the flexible sealing block 213 is a rubber plug.

[0041] A construction method for a cantilevered I-beam anchor structure of an assembled floor slab comprises the following steps: S1: Pre-embedded anchor components: The specific steps are as follows: S1.1: Reference Figure 3 When the prefabricated panel layer 11 is manufactured in the factory, the U-shaped rod 20 and the two threaded sleeves 21 are embedded in the prefabricated panel layer 11, and the U-shaped rod 20 is welded and fixed to the internal steel bar structure of the prefabricated panel layer 11; S1.2: During subsequent on-site construction, refer to Figure 4 and Figure 5 After the prefabricated slab layer 11 is installed and fixed, before pouring the cast-in-place slab layer 12 of the composite floor 1, the two connecting screws 22 are screwed into the top ends of the two threaded sleeves 21 respectively.

[0042] By pre-embedding the threaded sleeve 21 on the precast panel 11 in advance, during subsequent construction, the threaded sleeve 21 can be directly used as the connection point between the precast panel 11 and the connecting screw 22. By screwing the connecting screw 22 into the threaded sleeve 21, the installation of the anchor component can be completed, which is beneficial to saving the installation construction time of the on-site anchor component; by screwing the connecting screw 22 into the threaded sleeve 21 before pouring the cast-in-place panel 12 of the composite floor 1, it is beneficial to limit the subsequent clogging of the threaded sleeve 21 due to the pouring of the cast-in-place panel 12, which affects the subsequent installation of the connecting screw 22.

[0043] S2: I-beam 3 fixed: reference Figure 1 and Figure 5 , the specific steps are as follows: S2.1: Move the I-beam 3 between the two connecting screws 22; S2.2: Insert the pressing plate 23 into the two connecting screws 22 through the two connecting holes; S2.3: Screw the fastening nut 24 into the top of the connecting screw 22 and tighten it until the pressure plate 23 is pressed against the top of the I-beam 3.

[0044] S3: Removal of I-beam 3: The specific steps are as follows: S3.1: Unscrew and remove the fastening nut 24 from the top of the connecting screw 22; S3.2: Remove the pressing plate 23 from the two connecting screws 22, and finally remove the I-beam 3 from between the two connecting screws 22; S4: Removal of connecting screw 22: Refer to Figure 1 and Figure 6 , remove the connecting screw 22 from the corresponding threaded sleeve 21. The connecting screw 22 can be reused, which is conducive to better saving construction costs.

[0045] S5: Filling grouting: refer to Figure 2 and Figure 5 , the specific steps are as follows: S5.1: Remove the flexible blocking block 213 at the grouting hole 212 of the threaded sleeve 21 from the threaded sleeve 21; S5.2: Inject epoxy resin slurry into the inner cavity of the threaded sleeve 21 and the holes left on the cast-in-place slab layer 12 of the composite floor 1 after the connecting screw 22 is removed by high-pressure grouting equipment.

[0046] By injecting epoxy resin slurry into the inner cavity of the threaded sleeve 21 and the holes left by the connecting screw 22 on the cast-in-place slab layer 12, the holes on the surface of the composite floor 1 are filled and repaired, which is beneficial to reducing the subsequent occurrence of holes on the surface of the composite floor 1; by setting the grouting holes 212 on the outer periphery of the threaded sleeve 21, the epoxy resin subsequently injected into the threaded sleeve 21 can penetrate into the gap between the outer periphery of the threaded sleeve 21 and the composite floor 1 through the grouting holes 212 to fill the gap between the outer periphery of the threaded sleeve 21 and the composite floor 1, which is beneficial to further limit the subsequent external water vapor from entering the interior of the composite floor 1 through the gap between the outer periphery of the threaded sleeve 21 and the composite floor 1, resulting in the corrosion of the internal steel structure of the composite floor 1.

[0047] In the present application, during the construction stage of the composite floor 1, the anchoring components are pre-embedded in the composite floor 1 in advance. When the I-beam 3 is subsequently installed and fixed on the composite floor 1, the I-beam 3 can be fixed directly by the pressure plate 23 and the fastening bolts in cooperation with the pre-embedded anchoring components. The overall installation process does not require drilling holes on the composite floor 1, which effectively reduces the possibility of damage to the composite floor 1 during the process of fixing the I-beam 3 through the anchoring structure.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cantilevered I-beam anchoring structure of an assembled floor, comprising an anchoring member, a pressing plate (23) and a plurality of fastening nuts (24); characterized in that: The anchoring member comprises two threaded sleeves (21), the top ends of the threaded sleeves (21) are both threadedly connected to connecting screws (22); the bottom ends of the threaded sleeves (21) and the connecting screws (22) are both pre-buried in the composite floor slab (1); The pressing plate (23) is provided with two connection holes corresponding to the two connection screws (22), and the pressing plate (23) is sleeved on the two connection screws (22) through the two connection holes; The fastening nut (24) is threadedly connected to the top of the connecting screw (22).

2. The cantilevered I-beam anchoring structure of a prefabricated floor according to claim 1, characterized in that: The top and bottom ends of the threaded sleeve (21) are coaxially connected with an annular water-stopping wing ring (211).

3. The cantilevered I-beam anchoring structure of a prefabricated floor according to claim 2, characterized in that: The anchoring member also includes a U-shaped rod (20), the U-shaped rod (20) is pre-buried in the composite floor (1), the U-shaped rod (20) includes two vertical sections (201), and the bottom ends of the two threaded sleeves (21) are respectively threadedly sleeved on the two vertical sections (201) of the U-shaped rod (20).

4. The cantilevered I-beam anchoring structure of a prefabricated floor according to claim 3 is characterized in that: The U-shaped rod (20) is welded and fixed to the steel bar structure in the composite floor slab (1).

5. The construction method of the cantilevered I-beam anchor structure of the assembled floor according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: pre-embedding of anchoring components: pre-embedding the bottom ends of two threaded sleeves (21) and two connecting screws (22) in the composite floor slab (1); S2: Fixing the I-beam (3): Move the I-beam (3) between the two connecting screws (22), insert the pressure plate (23) into the two connecting screws (22) through the two through holes, and finally screw the fastening nut (24) into the top of the connecting screw (22); S3: Removal of the I-beam (3): Remove the fastening nut (24) and the pressure plate (23) at the top of the connecting screw (22), and remove the I-beam (3) from between the two connecting screws (22); S4: Removal of the connecting screw (22): Remove the connecting screw (22) from the corresponding threaded sleeve (21).

6. The construction method of the cantilevered I-beam anchor structure of the assembled floor according to claim 5, characterized in that: The specific steps of step S1 are as follows: S1.1: Pre-embedding of threaded sleeves (21): pre-embedding two threaded sleeves (21) in the prefabricated board layer (11) of the composite floor slab (1); S1.2: Pre-embedding of connecting screw rods (22): Before pouring the cast-in-place slab layer (12) of the composite floor slab (1), the connecting screw rods (22) are screwed into the corresponding threaded sleeves (21).

7. The construction method of the cantilevered I-beam anchor structure of the assembled floor according to claim 5, characterized in that: The following steps are also included: S5: Injecting epoxy resin slurry into the interior of the threaded sleeve (21) and into the holes left on the cast-in-place slab layer (12) after the connecting screw (22) is removed.

8. The construction method of the cantilevered I-beam anchor structure of the assembled floor according to claim 7, characterized in that: The outer periphery of the top of the threaded sleeve (21) is provided with grouting holes (212), and the grouting holes (212) are filled with flexible blocking blocks (213); In step S5, before injecting epoxy resin slurry into the threaded sleeve (21), the flexible blocking block (213) is removed from the grouting hole (212).

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