A steel bar truss floor support device and construction method

Abstract

The present application relates to the technical field of building engineering, and discloses a steel bar truss floor support device, which comprises a lower floor, an upper floor, a support assembly installed on the lower floor and used for supporting the upper floor, and a support used for fixing the support assembly; the support assembly comprises a first support assembly arranged close to the first support, a horizontal support structure connected with the end of the first support assembly, and a second support assembly connected with the horizontal support structure; the horizontal support structure comprises a support part integrally arranged with the end of the first support assembly, a limiting groove opened upward and downward in the support part, a support column arranged vertically and with the bottom arranged in the limiting groove, and a transverse support rib arranged horizontally and connected with the support column and the first support; the first support assembly and the second support assembly are arranged in sequence, and the horizontal support structure is arranged between the first support assembly and the second support assembly, so that the bearing capacity of the temporary floor support device is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a steel truss floor deck support device and construction method. Background Technology

[0002] Floor decking is a precast component used in building construction. It is typically used in concrete structures, installed on horizontal steel joists, with a steel mesh laid on top before concrete is poured. Cantilever floor decking refers to the portion of the floor decking that extends beyond the main structure. This type of structure is commonly used in balconies, terraces, canopies, and other building components. Special attention needs to be paid to the design and construction of cantilever floor decking to ensure the safety and stability of the structure. Temporary support devices are designed to improve the stability and safety of floor decking construction.

[0003] However, existing temporary support devices for floor decking are insufficient for supporting certain cantilevered floor deckings. For example, in Chinese invention patent CN116335320A, the support part is only a telescopic diagonal rod assembly, and the bottom of the diagonal rod assembly is not securely fixed. Therefore, when facing complex structures such as long cantilever lengths, heavy loads, non-linear shapes, or multiple support points, harsh external environments during construction, or certain special construction requirements, the temporary bearing capacity required for cantilevered floor deckings is high. In such cases, existing temporary support devices are difficult to meet the requirements, so a floor decking support device that can improve the bearing capacity is needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a steel truss floor deck support device and construction method. By setting up a first support component and a second support component that extend sequentially, and setting up a horizontal support structure between the first support component and the second support component, the first support component and the second support component provide a first level of support force, and the horizontal support structure provides a second level of support force, which greatly improves the load-bearing capacity of the temporary floor deck support device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a steel truss floor deck support device, comprising a lower floor deck, an upper floor deck, a support assembly installed on the lower floor deck for supporting the upper floor deck, and a bracket for fixing the support assembly; at least one set of the support assembly and the bracket are arranged along the width direction of the lower floor deck; the bracket includes a first bracket fixed near the edge of the lower floor deck and capable of being raised and lowered, and a bracket cylinder is provided on the outside of the first bracket to enable it to be raised and lowered; the support assembly includes a first support assembly located near the first bracket and capable of being telescopic, a horizontal support structure connected to the end of the first support assembly, and a second support assembly connected to the horizontal support structure and capable of being telescopic; the first support assembly is provided on the outside to enable it to be telescopic. The first hydraulic cylinder; the second support assembly is externally provided with a second hydraulic cylinder that allows it to extend and retract; the horizontal support structure includes a support part integrally formed with the end of the first support assembly, a limiting groove formed from top to bottom in the support part, a vertically arranged support column with its bottom placed in the limiting groove, and a horizontally arranged transverse support rib connecting the support column and the first bracket; the distance between the left and right sidewalls of the limiting groove is greater than the maximum diameter of the support column; a positioning plate is fixedly connected to the outside of the first bracket by bolts, the positioning plate has vertically arranged threaded holes, and the support column has an insertion hole corresponding to the threaded holes; one end of the transverse support rib is externally provided with an external thread, one end of the transverse support rib is threaded to the threaded hole through the external thread, and the other end is inserted into the corresponding insertion hole.

[0006] Furthermore, the first end of the second support component is sleeved with the top of the support column, and the end of the second support component is fixedly connected to a support; a top support is provided on the top of the first bracket, and a fixed sleeve is fixedly connected to the top support, the support rod is inserted into the fixed sleeve and placed on the support; a support plate is laid on the top of the support rod.

[0007] Furthermore, the width of the limiting groove is greater than the width of the support column, the bottom surface of the limiting groove is a concave arc surface, and the bottom surface of the support column is a concave arc surface.

[0008] Furthermore, the radius corresponding to the bottom surface of the limiting groove is greater than the radius corresponding to the bottom surface of the support column.

[0009] Furthermore, a base is fixedly connected to the bottom of the first bracket, and the base is fixedly connected to the lower floor deck. Two fixing blocks are arranged at intervals along the front-back direction on the upper surface of the base. A fixing seat is arranged between the two fixing blocks. The fixing seat is rotatably connected to the fixing blocks through a rotating shaft. A motor is fixedly connected to one of the fixing blocks, and the output end of the motor is fixedly connected to the rotating shaft. The fixing seat has a slot, and the first support component is inserted into the slot.

[0010] Furthermore, one of the fixed blocks is fixedly connected to a fixed shaft, and one end of the rotating shaft passes through a section of the other fixed block and is provided with a ratchet tooth in the circumferential direction. The fixed shaft is rotatably connected to a check pawl that cooperates with the ratchet tooth. The ratchet tooth and the check pawl form a ratchet mechanism to prevent the fixed seat from rotating clockwise.

[0011] Furthermore, a column is provided between the lower floor deck and the upper floor deck, and a column head is provided at the top of the column. The first bracket is located on one side of the column. The bracket also includes a second bracket symmetrically arranged on both sides of the same column as the first bracket. A first fixing strip is provided on the side of the first bracket near the second bracket, and a second fixing strip is provided on the second bracket corresponding to the first fixing strip. A second slot is opened horizontally on the side of the second fixing strip near the first fixing strip. The first fixing strip is fixed to the second fixing strip by inserting into the second slot. Both the first fixing strip and the second fixing strip are vertically provided with mutually cooperating first slots. The first fixing strip and the second fixing strip are locked into the column by the corresponding first slots.

[0012] Furthermore, a first fixing strip and a second fixing strip at the same height form a group, and at least one group is set along the vertical direction.

[0013] Furthermore, the upper surfaces of both the first and second fixing strips are fixed with platform plates by bolts; the platform plates are arranged along the front-to-back direction.

[0014] A construction method for a steel truss floor deck support device includes the following steps: Step 1, processing steel truss floor decks and inspecting their quality; Step 2, laying the bottom layer of steel truss floor decks; determining the cantilever length of the cantilevered floor deck, and then sequentially erecting the early stripping formwork system and the steel truss floor deck support device; Step 3, laying the upper floor deck on top of the early stripping formwork system and the steel truss floor deck support device.

[0015] The beneficial effects of this invention are: 1. By setting up a first support component and a second support component that extend sequentially, and setting up a horizontal support structure between the first support component and the second support component, the first support component and the second support component provide the first level of support force, and the horizontal support structure provides the second level of support force, which greatly improves the load-bearing capacity of the temporary floor deck support device.

[0016] 2. The horizontal support structure also serves to connect the first and second support components. The rotating structure at the head end of the first support component is used to adjust the support length of the entire support component. The ratchet mechanism prevents the first support component from rotating downwards under gravity and also strengthens the vertical support force of the first support component, so that the support force of the first support component does not rely solely on the slot and the stopping effect of the output end when the motor stops. By setting a large left and right limiting groove, the support column can move within the limiting groove. When the first support component is rotated, even if the limiting groove is tilted, the support column can still be inserted into the limiting groove and can still receive the support of the first support component, while the support column can remain vertical. The first bracket is set to maintain the stability and safety of the support component.

[0017] 3. Setting up a second support is to maintain the stability of the first support, thereby further ensuring the stability of the support assembly, especially suitable for situations where the temporary load-bearing capacity required for cantilever floor slabs is high; the first and second supports symmetrically clamp the column from both sides, ensuring the stability of the column, while also maintaining their own stability with the help of the column, so that the support and the column form an integral whole, thereby further improving the stability of the entire support assembly. At the same time, the support can be raised and lowered, providing support for the early dismantling formwork system; after the two supports are installed, a platform board can be laid on the fixing strip as a construction platform for workers, which is convenient, quick, and safe, and also eliminates the work process of transferring and erecting a separate construction platform. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a front view structural diagram of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a schematic diagram of the steering structure of the present invention; Figure 6 This is a schematic cross-sectional view of the anti-tilting limiting groove structure of the present invention; Figure 7 This describes the installation process of steel truss floor decking.

[0019] In the diagram: 1. Lower floor deck; 2. Upper floor deck; 3. First support; 4. Second support; 5. Column; 6. Column head; 7. First fixing strip; 8. Second fixing strip; 9. First slot; 10. Second slot; 11. Support cylinder; 12. Platform plate; 13. Fixing block; 14. Rotating shaft; 15. Motor; 16. Fixing seat; 17. Slot; 18. First support assembly; 1801. Support part; 1802. Limiting groove; 19. Racket; 20. Fixing shaft; 21. Anti-return pawl; 22. First hydraulic cylinder; 23. Support column; 24. Positioning plate; 25. Threaded hole; 26. Insertion hole; 27. Transverse support rib; 28. External thread; 29. ​​Second support assembly; 30. Second hydraulic cylinder; 31. Support; 32. Fixing sleeve; 33. Support rod; 34. Support plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0022] Example: like Figures 1-7 As shown, a steel truss floor deck support device includes a lower floor deck 1, an upper floor deck 2, a support assembly installed on the lower floor deck 1 to support the upper floor deck 2, and a bracket for fixing the support assembly. A support component and a bracket are grouped together, and at least one group of support components and brackets is provided along the width direction of the lower floor deck 1; the upper floor deck 2 includes a main body corresponding to the lower floor deck 1 and a cantilevered part that extends laterally beyond the lower floor deck 1; the support component is provided corresponding to the cantilevered part; The support includes a first support 3 that is fixed near the edge of the lower floor deck 1 and can be raised and lowered. The first support 3 is provided with a support cylinder 11 that enables it to be raised and lowered. The first support 3 is composed of a sleeve and a lifting column that are nested together and can slide relative to each other. One end of the support cylinder 11 is fixedly connected to the sleeve and the other end is fixedly connected to the lifting column. The support assembly includes a first support component 18 that is located near the first bracket 3 and is telescopic, a horizontal support structure connected to the end of the first support component 18, and a second support component 29 that is connected to the horizontal support structure and is telescopic. The first support component 18 has a first hydraulic cylinder 22 externally mounted to enable its telescopic movement. The first support component 18 includes a fixed rod and a sliding sleeve that are nested together and can slide relative to each other. One end of the first hydraulic cylinder 22 is fixedly connected to the fixed rod, and the other end is fixedly connected to the sliding sleeve. The second support component 29 has a second hydraulic cylinder 30 externally mounted to enable its telescopic movement. The second support component 29 consists of nested fixed rods and a sliding sleeve. The system comprises a second fixed rod and a second sliding sleeve that are nested and can slide relative to each other. One end of the second hydraulic cylinder 30 is fixedly connected to the second fixed rod, and the other end is fixedly connected to the second sliding sleeve. The horizontal support structure includes a support portion 1801 integrally formed with the end of the first support assembly 18, a limiting groove 1802 formed from top to bottom in the support portion 1801, a support column 23 set vertically and with its bottom placed in the limiting groove 1802, and a transverse support rib 27 set horizontally and connecting the support column 23 and the first bracket 3. The first end of the first support assembly 18 can be set in the lower floor deck 1 or connected to the first bracket 3. The distance between the left and right sidewalls of the limiting groove 1802 is greater than the maximum diameter of the support column 23, so that the support column 23 does not affect the rotation of the limiting groove 1802 in the vertical plane; a positioning plate 24 is fixedly connected to the outside of the first bracket 3 by bolts. The positioning plate 24 has vertically arranged threaded holes 25. The support column 23 has vertically arranged insertion holes 26 corresponding to the threaded holes 25. The number of threaded holes 25 and insertion holes 26 can be different, but they are horizontally corresponding to each other; one end of the transverse support rib 27 is provided with an external thread 28. One end of the transverse support rib 27 is threaded to the threaded hole 25 through the external thread 28, and the other end is inserted into the corresponding insertion hole 26; both the threaded hole 25 and the insertion hole 26 are opened in the left and right direction, and the insertion hole 26 horizontally penetrates the support column 23; the positioning plate 24 can be set in the sleeve or lifting column of the first bracket 3, and its height is not lower than the height of the support column 23; Figure 1 or Figure 3 As shown in the figure, the left and right directions are the length direction, and the front and back directions are the width direction.

[0023] By setting up a first support component and a second support component that extend sequentially, and setting up a horizontal support structure between the first support component and the second support component, the first support component and the second support component provide a first level of support force, and the horizontal support structure provides a second level of support force, which greatly improves the load-bearing capacity of the temporary floor deck support device.

[0024] The first end of the second support component 29 is sleeved with the top of the support column 23, and the end of the second support component 29 is fixedly connected to the support 31; the top of the first bracket 3 is provided with a top support, and the top support is fixedly connected to a fixing sleeve 32; the support rod 33 is inserted into the fixing sleeve 32 and placed on the support 31; a support plate 34 is laid on the top of the support rod 33.

[0025] The width of the limiting groove 1802 is slightly larger than the width of the support column 23. The bottom surface of the limiting groove 1802 is a concave arc surface, and the bottom surface of the support column 23 is a concave arc surface. The arc surface facilitates the relative rotation of the limiting groove 1802 and the support column 23, so that the support column 23 can still be stably located inside the limiting groove 1802. It is just that after rotation, the bottom of the support column 23, which was originally placed at the center of the bottom of the limiting groove 1802, is now placed at or near the edge of the limiting groove 1802. However, it is generally not necessary to rotate too much, because the cantilever beam will not be too short. If it is too short, the required bearing capacity will not be very large, so this solution is not necessary, and conventional support can be used. The first support component 18 is set to be able to rotate mainly to meet the requirement of long-distance adjustment, that is, to expand the support range in the length direction.

[0026] By setting a limiting groove with a large left and right dimension, the support column can move in the limiting groove. When the first support component is rotated, even if the limiting groove is tilted, the support column can still be inserted into the limiting groove and can still receive the support of the first support component. At the same time, the support column can remain vertical. The first bracket is set to maintain the stability and safety of the support component.

[0027] The radius corresponding to the bottom surface of the limiting groove 1802 is greater than the radius corresponding to the bottom surface of the support column 23.

[0028] The first bracket 3 is fixedly connected to a base at its bottom. The base is fixedly connected to the lower floor deck 1. Two fixing blocks 13 are arranged at intervals along the front-back direction on the upper surface of the base. A fixing seat 16 is arranged between the two fixing blocks 13. The fixing seat 16 is rotatably connected to the fixing blocks 13 through a rotating shaft 14. A motor 15 is fixedly connected to one of the fixing blocks 13. The output end of the motor 15 is fixedly connected to the rotating shaft 14. The fixing seat 16 has a slot 17, and the first support component 18 is inserted into the slot 17.

[0029] One of the fixed blocks 13 is fixedly connected to a fixed shaft 20. One end of the rotating shaft 14 passes through a section of the other fixed block 13 and is provided with a ratchet 19 in a circumferential direction. The fixed shaft 20 is rotatably connected to a check pawl 21 that cooperates with the ratchet 19. The ratchet 19 and the check pawl 21 form a ratchet mechanism to prevent the fixed seat 16 from rotating clockwise. The ratchet mechanism can prevent the first support component from rotating downward under the action of gravity, and at the same time, it can strengthen the vertical support force of the first support component, so that the support force of the first support component does not only rely on the stop action of the slot and the output end when the motor stops.

[0030] The fixed base 16 is spherical, which facilitates rotation and can minimize the height of the fixed base 16 and lower the center of gravity.

[0031] A column 5 is provided between the lower floor deck 1 and the upper floor deck 2. A column head 6 is provided on the top of the column 5. A first bracket 3 is located on one side of the column 5. The bracket also includes a second bracket 4 symmetrically arranged on both sides of the same column 5 as the first bracket 3. The second bracket 4 is the same as the first bracket 3. A first fixing strip 7 is provided on the side of the first bracket 3 near the second bracket 4. A second fixing strip 8 is provided on the second bracket 4 corresponding to the first fixing strip 7. A second slot 10 is opened horizontally on the side of the second fixing strip 8 near the first fixing strip 7. The first fixing strip 7 is fixed to the second fixing strip 8 by inserting into the second slot 10. Both the first fixing strip 7 and the second fixing strip 8 are vertically opened with mutually cooperating first slots 9. The first fixing strip 7 and the second fixing strip 8 are locked in place by the corresponding first slots 9.

[0032] A first fixing strip 7 and a second fixing strip 8 at the same height form a group, and at least one group is set vertically.

[0033] The platform plate 12 is fixed to the upper surface of both the first fixing strip 7 and the second fixing strip 8 by bolts; the platform plate 12 is arranged in the front-to-back direction.

[0034] The second support is installed to maintain the stability of the first support, thereby further ensuring the stability of the support assembly. This is especially suitable for situations where the temporary load-bearing capacity required for cantilevered floor slabs is high. The first and second supports symmetrically clamp the column from both sides, ensuring the column's stability. At the same time, they maintain their own stability with the help of the column, making the supports and the column form a whole, thereby further improving the stability of the entire support assembly. The supports can also be raised and lowered, providing support for the early dismantling formwork system. After the two supports are installed, a platform board can be laid on the fixing strip as a construction platform for workers, which is convenient, quick, and safe, and also eliminates the need for the separate transfer and erection of the construction platform.

[0035] A construction method for a steel truss floor deck support device includes the following steps: Step 1, processing the steel truss floor deck and inspecting its quality; Step 2, laying the bottom layer of steel truss floor deck, i.e., the lower floor deck 1; determining the cantilever length of the cantilevered floor deck, and then erecting the early stripping formwork system and the steel truss floor deck support device in sequence; Step 3, laying the upper floor deck 2 on top of the early stripping formwork system and the steel truss floor deck support device.

[0036] If there is no cantilevered floor deck, temporary support devices such as early stripping formwork systems can be used, or this solution can be used instead of ordinary temporary support devices such as early stripping formwork systems to support the upper and lower floor decks. Although this solution is mainly suitable for occasions with high load-bearing requirements, it can also be used as an ordinary temporary support device.

[0037] Before implementing step 1, construction preparations need to be made, such as drawing up the layout diagram of the steel truss floor deck and counting the components. Then, the steel truss floor deck and accessories are processed. After the steel truss floor deck and accessories are processed, they need to go through the inspection, transportation, warehousing and random inspection process. If they are not qualified, they need to be repaired. Only if they are qualified can they be transported to the construction site for installation, layout, welding and so on.

[0038] When implementing step 2, it is necessary to build a steel frame and locate the position of the steel truss floor slab and the position of the temporary support frame and / or the steel truss floor slab support device according to the layout drawing.

[0039] After the relevant materials for laying the steel truss floor decking are hoisted in sections, the laying of the steel truss floor decking and the cutting of materials at the edges and corners begins. The laying of the steel truss floor decking requires straightening, compaction and spot welding, followed by self-inspection. If the self-inspection fails, it is cut open and the above process is repeated. After passing the inspection, welding continues and the laying and installation of the scrap materials begins. After welding is completed, it needs to be inspected by a first-level professional. Finally, the site is cleaned up.

[0040] Before laying the upper floor deck slab, install the steel truss floor deck slab support device. It can be installed between the lower floor deck slab 1 and the upper floor deck slab 2, or corresponding to the cantilever section. Alternatively, a pre-stripping formwork system can be erected between the lower floor deck slab 1 and the upper floor deck slab 2. Start the support cylinder 11 to raise the two supports. The first slot 9 of the first support 3 and the second support 4 engages the column 5, and the first support 3 and the second support 4 are interlocked through the second slot 10. Then, fix the bases of the two supports onto the lower floor deck slab 1. Based on the length of the cantilever section, raise the anti-return pawl 21, start the motor 15 to rotate and adjust the first support assembly 18 to a suitable position, and start the first... The hydraulic cylinder 22 extends the first support assembly 18 to the predetermined position. Generally, it is best to keep the support part 1801 horizontal. Install the positioning plate 24, put the support column 23 into the limiting groove 1802, then pass the transverse support bar 27 through the insertion hole 26 and connect it with the threaded hole 25. Next, install the second support assembly 29 on the top of the support column 23. According to the height of the upper floor deck 2, start the second hydraulic cylinder 30 to adjust the height of the second support assembly 29. Then, pass the support rod 33 through the fixing sleeve 32 and place it on the support 31. Finally, place the support plate 34 on the support rod 33. The steel truss floor deck support device is erected and the upper floor deck 2 is laid.

[0041] The above is only used to illustrate the technical solution of the present invention and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A steel truss floor deck support device, characterized in that: It includes a lower floor deck (1), an upper floor deck (2), a support assembly installed on the lower floor deck (1) to support the upper floor deck (2), and a bracket for fixing the support assembly; At least one set of the support components and the brackets are provided along the width direction of the lower floor deck (1); the brackets include a first bracket (3) fixed near the edge of the lower floor deck (1) and capable of being raised and lowered, and the first bracket (3) is provided with a bracket cylinder (11) on its exterior to enable it to be raised and lowered. The support assembly includes a first support assembly (18) that is located near the first bracket (3) and is telescopic, a horizontal support structure connected to the end of the first support assembly (18), and a second support assembly (29) that is connected to the horizontal support structure and is telescopic; a first hydraulic cylinder (22) that enables telescopic movement is provided on the outside of the first support assembly (18); a second hydraulic cylinder (30) that enables telescopic movement is provided on the outside of the second support assembly (29); the horizontal support structure includes a support part (1801) integrally formed with the end of the first support assembly (18), a limiting groove (1802) formed from top to bottom in the support part (1801), a support column (23) that is vertically arranged and whose bottom is placed in the limiting groove (1802), and a transverse support rib (27) that is horizontally arranged and connects the support column (23) to the first bracket (3). The distance between the left and right sidewalls of the limiting groove (1802) is greater than the maximum diameter of the support column (23); the first bracket (3) is fixedly connected to a positioning plate (24) by bolts, the positioning plate (24) has vertically arranged threaded holes (25), and the support column (23) has an insertion hole (26) corresponding to the threaded hole (25); one end of the transverse support rib (27) is provided with an external thread (28), one end of the transverse support rib (27) is threaded to the threaded hole (25) through the external thread (28), and the other end is inserted into the corresponding insertion hole (26); Wherein: a column (5) is provided between the lower floor deck (1) and the upper floor deck (2), and a column head (6) is provided on the top of the column (5). The first bracket (3) is located on one side of the column (5). The bracket also includes a second bracket (4) symmetrically arranged on both sides of the same column (5) with the first bracket (3). A first fixing strip (7) is provided on the side of the first bracket (3) near the second bracket (4). A second fixing strip (8) is provided on the side of the second bracket (4) corresponding to the first fixing strip (7). A second slot (10) is opened horizontally on the side of the second fixing strip (8) near the first fixing strip (7). The first fixing strip (7) is fixed to the second fixing strip (8) by inserting into the second slot (10). Both the first fixing strip (7) and the second fixing strip (8) are vertically provided with mutually cooperating first slots (9). The first fixing strip (7) and the second fixing strip (8) are locked in place by the corresponding first slots (9).

2. The steel truss floor deck support device according to claim 1, characterized in that: The first end of the second support component (29) is sleeved with the top of the support column (23), and the end of the second support component (29) is fixedly connected to a support (31); the top of the first bracket (3) is provided with a top support, and the top support is fixedly connected to a fixed sleeve (32), and the support rod (33) is inserted into the fixed sleeve (32) and placed on the support (31); the top of the support rod (33) is covered with a support plate (34).

3. The steel truss floor deck support device according to claim 1, characterized in that: The width of the limiting groove (1802) is greater than the width of the support column (23), the bottom surface of the limiting groove (1802) is a concave arc surface, and the bottom surface of the support column (23) is a concave arc surface.

4. The steel truss floor deck support device according to claim 3, characterized in that: The radius of the bottom surface of the limiting groove (1802) is greater than the radius of the bottom surface of the support column (23).

5. A steel truss floor deck support device according to claim 1, characterized in that: The first bracket (3) has a base fixedly connected to its bottom. The base is fixedly connected to the lower floor deck (1). Two fixing blocks (13) are arranged at intervals along the front-back direction on the upper surface of the base. A fixing seat (16) is arranged between the two fixing blocks (13). The fixing seat (16) is rotatably connected to the fixing block (13) through a rotating shaft (14). One of the fixing blocks (13) is fixedly connected to a motor (15). The output end of the motor (15) is fixedly connected to the rotating shaft (14). The fixing seat (16) has a slot (17). The first support component (18) is inserted into the slot (17).

6. A steel truss floor deck support device according to claim 5, characterized in that: One of the fixed blocks (13) is fixedly connected to a fixed shaft (20). One end of the rotating shaft (14) passes through a section of the other fixed block (13) and is provided with a ratchet (19) in a circumferential direction. The fixed shaft (20) is rotatably connected to a pawl (21) that cooperates with the ratchet (19). The ratchet (19) and the pawl (21) form a ratchet mechanism to prevent the fixed seat (16) from rotating clockwise.

7. A steel truss floor deck support device according to claim 1, characterized in that: One of the first fixing strips (7) and one of the second fixing strips (8) at the same height form a group, and at least one group is set along the vertical direction.

8. A steel truss floor deck support device according to claim 7, characterized in that: The upper surfaces of the first fixing strip (7) and the second fixing strip (8) are both covered with platform plates (12) by bolts; the platform plates (12) are arranged in the front-back direction.

9. A construction method using the steel truss floor deck support device according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Process the steel truss floor deck and inspect whether it is qualified; Step 2: Lay the bottom layer of steel truss floor deck; Determine the length of the cantilever section of the cantilever floor deck, and then erect the early stripping formwork system and the steel truss floor deck support device in sequence; Step 3: Lay the upper floor deck (2) on top of the early stripping formwork system and the steel truss floor deck support device.

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