Overhanging truss floor support device and construction method thereof

Abstract

The application provides a kind of overhanging truss floor support device and its construction method, to solve the problem of large amount of measures, inconvenient to disassemble and high cost when overhanging truss floor is constructed. The support device includes a stand, a support mechanism, an edge mold clamp, a connecting piece, and a lateral support rod. The support mechanism includes a first support section, a second support section, a horizontal support plate, and a cushion block. The edge mold clamp clamps and fixes the floor edge mold in the middle of the first support section. The connecting piece includes a first connecting section and a second connecting section. The first connecting section is connected to the end of the stand, and the second connecting section is connected to the end of the second support section. The lateral support rod connects and supports the middle of the second support section and the middle of the stand. The device has a relatively light weight, can be used repeatedly, has a fast construction speed, a high installation efficiency, and a high safety.

Description

Technical Field

[0001] This invention relates to the field of truss floor decking construction technology, and in particular to a cantilever truss floor decking support device and its construction method. Background Technology

[0002] Steel truss floor decks play a crucial role in multi-story and super high-rise buildings. Compared to ordinary reinforced concrete floor slabs, steel truss floor decks can be prefabricated in factories, transported to the construction site, and then hoisted to the appropriate position for laying using cranes. This significantly reduces the number of construction workers required while ensuring construction quality. With increasingly innovative building structural designs, cantilevered truss floor decks are often designed along the outer edges of buildings to meet architectural or structural design requirements. During the laying and subsequent pouring of these cantilevered truss floor decks, the cantilevered areas must bear the loads of workers and the construction loads of the cast-in-place concrete slab. Since the cantilevered areas cannot withstand these loads during construction, additional supports must be installed below the cantilevered areas.

[0003] Traditionally, cantilevered truss floor slabs are temporarily supported by scaffolding erected on the floor below. This method involves a large amount of work, is costly, inconvenient for on-site use and dismantling, and the scaffolding interferes with other construction processes on the lower floors. Some building construction uses tie-bracing or triangular bracing devices. For example, utility model CN218541498U discloses a tie-bracing system for cantilevered truss floor slabs; utility model CN216340891U discloses a detachable cantilever support device for cantilevered truss floor slabs; utility model CN212773372U discloses a simple support frame for the edge of a steel structure cantilevered slab; and utility model CN217631491U discloses a device for steel structure... Cantilever floor deck support; All of the above methods have two drawbacks: (1) The cantilever end of the floor deck should have an L-shaped side formwork. Since the side formwork is located at the bottom of the floor deck, the construction sequence is generally to first install and fix the side formwork, then install the truss floor deck, then fix the side formwork to the truss floor deck, and finally pour the floor slab concrete. However, the above patents do not explain how the side formwork is fixed on the support system before the truss floor deck is laid. Moreover, if the cantilever end is long, workers need to stand on the support system when installing the side formwork, which poses a great safety hazard and is inconvenient to operate. (2) The above devices are all connected and fixed to the web or upper and lower flanges of the side beam. The side beam is located below the floor slab. After the floor slab is poured, workers cannot directly go to the bottom of the cantilever floor slab to remove this device. They can only use mobile scaffolding or articulated boom trucks to remove it. Generally, the scaffolding or articulated boom truck needs to be hoisted from the ground to the floor below the floor where the cantilever floor slab is located, and then the support system is removed. The removal process is cumbersome and occupies lifting machinery. Moreover, the cost of removing this device is high. Summary of the Invention

[0004] In view of the above-mentioned defects in the existing technology, the present invention provides a cantilever truss floor deck support device and its construction method, which aims to solve the problems of large number of measures, inconvenient disassembly and high cost in the construction of cantilever truss floor decks.

[0005] To achieve the above objectives, the present invention provides a cantilever truss floor slab support device, characterized in that it comprises:

[0006] Columns are vertically connected to the upper surface of the structural edge beams of the cantilevered truss floor slab;

[0007] The support mechanism includes a first support section, a second support section fixedly connected to one end of the first support section at a certain angle, a horizontal support plate connected to the other end of the first support section, and a pad connected to the upper surface of the horizontal support plate.

[0008] A side formwork clamp is set in the middle of the first support section, and the side formwork of the floor deck is clamped and fixed in the middle of the first support section by bolts;

[0009] The connector includes a first connecting segment and a second connecting segment fixedly connected to one end of the first connecting segment at a certain angle; the first connecting segment is connected to the end of the column, and the second connecting segment is connected to the end of the second support segment.

[0010] A lateral strut connects and supports the middle part of the second support section to the middle part of the column.

[0011] Furthermore, the column, the first support section, the second support section, and the connector are all angle steel; the pad is channel steel.

[0012] Furthermore, the included angle between the first support segment and the second support segment is 110° to 140°; the included angle between the first connecting segment and the second connecting segment is 30° to 70°.

[0013] Furthermore, the middle and end portions of the column are respectively reserved with connecting plates and bolt connection holes, the end portion of the second support section is reserved with bolt connection holes, the end portion of the first connecting section is reserved with bolt connection holes corresponding to the bolt connection holes at the end of the column, and the end portion of the second connecting section is reserved with bolt connection holes corresponding to the bolt connection holes at the end of the second support section; the first connecting section is fixedly connected to the column through bolt connection holes and bolts, and the second connecting section is fixedly connected to the second support section through bolt connection holes and bolts.

[0014] Furthermore, the lateral support rod consists of two parts: one part is a round steel bar with external threads, and the other part is two sleeves with internal threads that are threaded to both ends of the round steel bar. The support length of the lateral support rod can be adjusted by connecting the threaded sleeves.

[0015] On the other hand, the present invention provides a construction method for a cantilever truss floor deck support device, characterized in that the cantilever truss floor deck is supported using the aforementioned cantilever truss floor deck support device, comprising the following steps:

[0016] Step S1: After prefabricating the columns, support mechanisms, side mold clamps, connectors, and lateral struts at the processing plant, transport them to the site;

[0017] Step S2: Weld the columns to the structural edge beams of the cantilever truss floor slab at appropriate intervals;

[0018] Step S3: On the ground, use the side mold clamp to clamp and fix the side mold of the floor deck slab onto the support mechanism with bolts;

[0019] Step S4: Hoist the entire device connected in step S3 to a designated high-altitude location; workers stand on the structural side beam and use the connectors to connect the column to the device connected in step S3, while using the lateral struts to connect the column and the support mechanism.

[0020] Step S5: Repeat step S4 along the structural edge beam to gradually install the support device;

[0021] Step S6: Workers stand on the structural beams and lay the floor deck truss. At the cantilevered points, the floor deck overlaps the support structure and the side formwork.

[0022] Step S7: The worker stands at the cantilever truss floor slab and fixes the side formwork and the floor slab truss together;

[0023] Step S8: The worker stands at the cantilever truss floor slab and removes the side formwork clamp;

[0024] Step S9: Pour the floor slab;

[0025] Step S10: After the floor slab concrete has solidified, the workers stand at the cantilever floor slab and gradually dismantle the support mechanism and lateral struts.

[0026] Step S11: Workers gradually cut away the columns on the floor slab.

[0027] Furthermore, in step S2, the spacing between the columns is 1.2 to 2 m.

[0028] Furthermore, in step S4, the connector and the column are provided with multiple bolt connection holes, which can be adjusted left and right or up and down according to the overlap length of the components to achieve the cantilever size required by the design.

[0029] Furthermore, in step S7, workers use blind rivets or intermittent spot welding to fix the side formwork and the floor deck truss together.

[0030] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0031] (1) The device of the present invention is lightweight and can be manually handled; disassembly does not require machinery.

[0032] (2) The construction method of the present invention is easy to disassemble, which can greatly save disassembly costs and measure costs;

[0033] (3) The construction method of the present invention speeds up construction, improves installation efficiency, and has high safety.

[0034] (4) The device of the present invention can be reused, saving materials. Attached Figure Description

[0035] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; the focus is on illustrating the spirit of the invention.

[0036] Figure 1 This is a schematic diagram of the structure of the cantilever truss floor deck support device in one embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the column structure of the support device in one embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the support mechanism structure of the support device in one embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the connecting member structure of the support device in one embodiment of the present invention;

[0040] Figure 5 This is a construction flowchart of a cantilever truss floor deck support device according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of step S2 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of step S3 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0043] Figure 8 This is a schematic diagram of step S4 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0044] Figure 9This is a schematic diagram of step S6 in the construction of the cantilever truss floor deck support device according to an embodiment of the present invention;

[0045] Figure 10 This is a schematic diagram of step S7 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0046] Figure 11 This is a schematic diagram of step S8 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0047] Figure 12 This is a schematic diagram of step S9 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0048] Figure 13 This is a schematic diagram of step S10 of the construction of the cantilever truss floor deck support device in one embodiment of the present invention;

[0049] Figure 14 This is a schematic diagram of step S11 of the construction process of the cantilever truss floor deck support device in one embodiment of the present invention;

[0050] Among them, 1. Structural edge beam; 2. Column; 3. Support mechanism; 31. First support section; 32. Second support section; 33. Horizontal support plate; 34. Pad block; 4. Edge formwork clamp; 5. Edge formwork; 6. Connector; 61. First connecting section; 62. Second connecting section; 7. Floor deck truss; 8. Blind rivet; 9. Cantilever floor slab; 10. Lateral strut. Detailed Implementation

[0051] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. It should be understood that all of these exemplary embodiments described are merely some embodiments and examples of the present invention, and not all of them. Rather, these exemplary embodiments are provided so that those skilled in the art can more thoroughly understand the present disclosure and to more completely convey the technical content of the present disclosure to those skilled in the art.

[0052] Example

[0053] See Figure 1 This embodiment provides a cantilever truss floor deck support device, including: a column 2, a support mechanism 3, a side formwork clamp 4, a connector 6, and a lateral strut 10. See also... Figure 2 Column 2 is vertically connected to the upper surface of the structural edge beam 1 of the cantilever truss floor slab. (See also...) Figure 3 The support mechanism 3 includes a first support section 31, a second support section 32 fixedly connected to one end of the first support section 31 at a certain angle, a horizontal support plate 33 connected to the other end of the first support section 31, and a pad 34 connected to the upper surface of the horizontal support plate 33. (See also...) Figure 3The side formwork clamp 4 is located in the middle of the first support section 31, and the floor decking side formwork 5 is clamped and fixed in the middle of the first support section 31 by bolts. See also Figure 4 The connector 6 includes a first connecting section 61 and a second connecting section 62 fixedly connected to one end of the first connecting section 61 at a certain angle; the first connecting section 61 is connected to the end of the column 2, and the second connecting section 62 is connected to the end of the second support section 32. (See also...) Figure 3 The lateral strut 10 connects and supports the middle part of the second support section 32 and the middle part of the column 2.

[0054] As a preferred technical solution, further: the column 2, the first support section 31, the second support section 32, and the connector 6 are all angle steel; the pad block 34 is channel steel. These materials are all commonly used on construction sites, are readily available, and are low in cost.

[0055] As a preferred technical solution, further: the included angle between the first support segment 31 and the second support segment 32 is 110° to 140°; the included angle between the first connecting segment 61 and the second connecting segment 62 is 30° to 70°. The matching setting of the included angles enables the support device to meet the local load-bearing requirements and makes the structure more stable.

[0056] As a preferred technical solution, further: connecting plates and bolt connection holes are reserved in the middle and at the ends of the column 2, bolt connection holes are reserved at the ends of the second support section 32, bolt connection holes are reserved at the ends of the first connecting section 61 corresponding to the bolt connection holes at the ends of the column 2, and bolt connection holes are reserved at the ends of the second connecting section 62 corresponding to the bolt connection holes at the ends of the second support section 32; the first connecting section 61 is fixedly connected to the column 2 through bolt connection holes and bolts, and the second connecting section 62 is fixedly connected to the second support section 32 through bolt connection holes and bolts.

[0057] As a preferred technical solution, the lateral support rod 10 further comprises two parts: one part is a round steel bar with external threads, and the other part is two sleeves with internal threads that are threaded to both ends of the round steel bar. The support length of the lateral support rod 10 can be adjusted by connecting the threaded sleeves. These structures and their connection methods are easy to process and operate.

[0058] See Figure 5 The construction of supporting the cantilever truss floor slab using the aforementioned cantilever truss floor slab support device includes the following steps:

[0059] Step S1: After prefabricating the column 2, support mechanism 3, side mold clamp 4, connector 6, and lateral support rod 10 at the processing plant, transport them to the site;

[0060] Step S2, see Figure 6The columns 2 are welded to the structural edge beams 1 of the cantilever truss floor slab at appropriate intervals;

[0061] Step S3, see Figure 7 The side mold 5 of the floor deck is clamped and fixed to the support mechanism 3 by bolts using the side mold clamp 4 on the ground;

[0062] Step S4, see Figure 8 The device completed in step S3 is hoisted to a designated high-altitude location; workers stand on the structural side beam 1 and use connectors 6 to connect the column 2 to the device completed in step S3, while using lateral struts 10 to connect the column 2 and the support mechanism 3.

[0063] Step S5, see Figure 1 The support device is installed by repeating step S4 along the structural edge beam 1.

[0064] Step S6, see Figure 9 Workers stand on the structural beams to lay the floor deck truss 7, and the floor deck at the cantilevered point overlaps the support mechanism 3 and the side formwork 5;

[0065] Step S7: The worker stands at the cantilever truss floor slab and fixes the side formwork 5 and the floor slab truss 7 together;

[0066] Step S8: The worker stands at the cantilever truss floor slab and removes the side formwork clamp 4;

[0067] Step S9: Pour the floor slab;

[0068] Step S10: After the floor slab concrete has solidified, the worker stands at the cantilever floor slab 9 and gradually removes the support mechanism 3 and the lateral strut 10.

[0069] Step S11: Workers gradually cut away column 2 on the floor slab.

[0070] As a preferred technical solution, furthermore: in step S2, the spacing between the columns 2 is 1.2 to 2 meters. The reasonable spacing between the columns ensures that the support device as a whole meets the load-bearing requirements, and also makes the weight of each individual device lighter, facilitating manual operation.

[0071] As a preferred technical solution, further: in step S4, the connector 6 and the column 2 are provided with multiple bolt connection holes, which can be adjusted left and right or up and down according to the overlap length of the components to achieve the cantilever size required by the design.

[0072] As a preferred technical solution, furthermore: in step S7, workers use blind rivets 8 or intermittent spot welding to fix the side formwork 5 and the floor deck truss 7 together. This fixing method makes the structure more robust and easier to operate.

[0073] It is understandable that the execution order of actions, steps, etc. in the apparatus and methods shown in the specification and drawings can be implemented in any order, as long as there is no special explicit restriction on the order and the output of the previous processing is not used in the subsequent processing.

[0074] In summary, this application provides a support device and construction method for cantilever truss floor decking to solve the problems of large quantities of measures, inconvenient disassembly, and high cost during the construction of cantilever truss floor decking. The support device includes a column, a support mechanism, a side formwork clamp, connectors, and lateral struts. The support mechanism includes a first support section, a second support section, a horizontal support plate, and pads. The side formwork clamp clamps and fixes the floor decking side formwork to the middle of the first support section. The connector includes a first connecting section and a second connecting section; the first connecting section connects to the end of the column, and the second connecting section connects to the end of the second support section. The lateral struts connect and support the middle of the second support section and the middle of the column. The device of this invention is lightweight, reusable, has a fast construction speed, high installation efficiency, and high safety.

[0075] In the description of this application, the terms "upper", "lower", "front", "back", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and are not intended to require the present invention to be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0076] The standard parts used in this application can be purchased directly from the market, and the non-standard structural parts described in the specification can also be processed directly based on existing technical common sense without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment (such as lead screws and rivets) all adopt conventional models in the existing technology, so they will not be described in detail here.

[0077] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A construction method for a cantilever truss floor deck support device, characterized in that: The cantilever truss floor deck support device includes: The column (2) is vertically connected to the upper surface of the structural side beam (1) of the cantilever truss floor slab; The support mechanism (3) includes a first support section (31), a second support section (32) fixedly connected to one end of the first support section (31) at a certain angle, a horizontal support plate (33) connected to the other end of the first support section (31), and a pad (34) connected to the upper surface of the horizontal support plate (33). The side formwork clamp (4) is located in the middle of the first support section (31) and the floor deck side formwork (5) is clamped and fixed in the middle of the first support section (31) by bolts; the included angle between the first support section (31) and the second support section (32) is 110°~140°; The connector (6) includes a first connecting segment (61) and a second connecting segment (62) fixedly connected to one end of the first connecting segment (61) at a certain angle; the first connecting segment (61) is connected to the end of the column (2), and the second connecting segment (62) is connected to the end of the second support segment (32); the angle between the first connecting segment (61) and the second connecting segment (62) is 30°~70°; Lateral strut (10) connects and supports the middle part of the second support section (32) and the middle part of the column (2); The construction method includes the following steps: Step S1: After prefabricating the column (2), support mechanism (3), side mold clamp (4), connector (6), and lateral support rod (10) at the processing plant, transport them to the site; Step S2: Weld the columns (2) at appropriate intervals to the structural side beams (1) of the cantilever truss floor slab; Step S3: On the ground, use the side mold clamp (4) to clamp and fix the side mold (5) of the floor deck to the support mechanism (3) with bolts; Step S4: The device that was connected in step S3 is hoisted to a designated high-altitude location; the worker stands on the structural side beam (1) and uses the connector (6) to connect the column (2) to the device that was connected in step S3, and at the same time uses the lateral support rod (10) to connect the column (2) and the support mechanism (3). Step S5: Repeat step S4 along the position of the structural side beam (1) to gradually install the support device; Step S6: Workers stand on the structural beams and lay the floor deck truss (7). The floor deck at the cantilever is connected to the support mechanism (3) and the side formwork (5). Step S7: The worker stands at the cantilever truss floor slab and fixes the side formwork (5) and the floor slab truss (7) together; Step S8: The worker stands at the cantilever truss floor slab and removes the side formwork clamp (4); Step S9: Pour the floor slab; Step S10: After the floor slab concrete has solidified, the worker stands at the cantilever floor slab (9) and gradually removes the support mechanism (3) and the lateral struts (10). Step S11: The worker gradually cuts off the column (2) on the floor slab.

2. The construction method of the cantilever truss floor deck support device according to claim 1, characterized in that, The column (2), the first support section (31), the second support section (32), and the connector (6) are all angle steel; the pad (34) is channel steel.

3. A construction method for a cantilever truss floor slab support device according to claim 1 or 2, characterized in that, The middle and end of the column (2) are respectively reserved with connecting plates and bolt connection holes. The end of the second support section (32) is reserved with bolt connection holes. The end of the first connecting section (61) is reserved with bolt connection holes corresponding to the bolt connection holes at the end of the column (2). The end of the second connecting section (62) is reserved with bolt connection holes corresponding to the bolt connection holes at the end of the second support section (32). The first connecting section (61) is fixedly connected to the column (2) through bolt connection holes and bolts. The second connecting section (62) is fixedly connected to the second support section (32) through bolt connection holes and bolts.

4. A construction method for a cantilever truss floor slab support device according to claim 1 or 2, characterized in that, The lateral support rod (10) consists of two parts: one part is a round steel bar with external threads, and the other part is two sleeves with internal threads that are threaded to both ends of the round steel bar. The support length of the lateral support rod (10) can be adjusted by connecting the threaded sleeves.

5. The construction method of the cantilever truss floor deck support device according to claim 1, characterized in that, In step S2, the spacing between the columns (2) is 1.2~2m.

6. The construction method of the cantilever truss floor deck support device according to claim 1, characterized in that, In step S4, the connector (6) and the column (2) are provided with multiple bolt connection holes, which can be adjusted left and right or up and down according to the overlap length of the components to achieve the required cantilever size.

7. The construction method of the cantilever truss floor deck support device according to claim 1, characterized in that, In step S7, the worker uses blind rivets (8) or intermittent spot welding to fix the side mold (5) and the floor deck truss (7) together.

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