A cantilevered floor formwork support structure

Abstract

The application discloses a cantilever floor bottom die supporting structure, relates to the technical field of cantilever formwork, and comprises a fixing frame fixed on a lower floor, a supporting rod is hinged on the fixing frame, a telescopic rod is slidably arranged on the supporting rod along the length direction of the supporting rod, a telescopic piece for driving the telescopic rod to telescopically extend is arranged on the supporting rod, a connecting plate is hinged on the telescopic rod, a fixing assembly for fixing the connecting plate on a steel beam is arranged on the connecting plate, and a bracing assembly for preventing the supporting rod from deflecting downward is arranged on the supporting rod. The application has the effects of simplifying construction, shortening a construction period, improving construction efficiency, facilitating the removal effect after the floor pouring is completed and the formwork removal condition is reached.

Description

Technical Field

[0001] This application relates to the technical field of cantilever formwork, and in particular to a bottom formwork support structure for cantilever floor slabs. Background Technology

[0002] With the rapid development of the construction industry, buildings are characterized by unique shapes and complex structures. Among the existing tower structures, there are often high-span cantilever structures designed to meet the requirements of architectural shape and highlight the sense of layering on the building facade. For such large-span cantilever structures, special structural design is required from the perspective of stress and function, including the selection of component materials, cross-sectional dimensions, connection methods, etc. In particular, the design and construction of the formwork support system can cause major safety accidents if there is any improper design.

[0003] Currently, in the installation of cantilevered floor slabs in steel structure buildings, the main method for supporting the bottom formwork of the cantilevered floor slabs is to use ground-mounted scaffolding. However, using ground-mounted scaffolding requires a lot of manpower and resources to erect, and dismantling the ground-mounted scaffolding after the cantilevered floor slab construction is completed also consumes a lot of time and manpower. Therefore, the bottom formwork support method using ground-mounted scaffolding has the disadvantages of long construction cycle and low construction efficiency. Summary of the Invention

[0004] To address the problems existing in the prior art, this application provides a bottom formwork support structure for cantilevered floor slabs, which has the effect of shortening the construction cycle and improving construction efficiency.

[0005] This application provides a bottom formwork support structure for a cantilevered floor slab, which adopts the following technical solution:

[0006] A bottom formwork support structure for a cantilevered floor slab includes a fixed frame fixed to the lower floor slab, a support rod hinged to the fixed frame, a telescopic rod slidably disposed on the support rod along its length, a telescopic component for driving the telescopic rod to extend and retract on the support rod, a connecting plate hinged to the telescopic rod, a fixing assembly for fixing the connecting plate to a steel beam on the connecting plate, and a top support assembly for preventing the support rod from deflecting downwards on the support rod.

[0007] Optionally, the top support assembly includes a connecting rod hinged to the support rod, an adjusting screw rotatably mounted on the connecting rod, a top support rod sleeved on the adjusting screw, and a stabilizing frame slidably mounted on the fixed frame. The top support rod is threadedly engaged with the adjusting screw. The stabilizing frame has an insertion slot for inserting the top support rod. The fixed frame has a first limiting member for preventing the stabilizing frame from sliding.

[0008] Optionally, the telescopic component includes a sleeve rod, which is rotatably sleeved on the support rod. The inner side wall of the sleeve rod is provided with an internal thread, and the side wall of the telescopic rod is provided with an external thread. The telescopic rod passes through the sleeve rod and is threadedly engaged with the sleeve rod.

[0009] Optionally, the telescopic rod includes a first rod body and a second rod body. The first rod body is threadedly engaged with a sleeve rod, and the second rod body is hinged to a connecting plate. A pressure relief rod is fixedly installed on the first rod body. The pressure relief rod is slidably installed on the second rod body along its length direction. A locking assembly for preventing the pressure relief rod from sliding is provided on the second rod body.

[0010] Optionally, the locking assembly includes a locking bar that rotates on the second rod, a locking block that is fixedly mounted on the locking bar, and a locking sleeve that is slidably mounted on the second rod. The side wall of the pressure relief rod is provided with a slot for the locking block to be inserted into. The locking sleeve is used to be mounted on the locking bar. The first rod is provided with a second limiting member to prevent the locking sleeve from sliding.

[0011] Optionally, a guide slope is provided on the side wall of the slot near the sleeve rod, and the guide slope gradually approaches the sleeve rod in a direction away from the force relief rod, and the locking block is adapted to the slot.

[0012] Optionally, a roller is rotatably provided on the locking block, the axial direction of the roller is parallel to the rotation axis of the locking bar, and the roller is used for rolling connection with the guide slope.

[0013] Optionally, the second rod is provided with an elastic element for driving the stress relief rod to slide away from the second rod.

[0014] Optionally, the fixing component includes a clamping plate and a third limiting member, wherein the clamping plate is slidably disposed on the connecting plate in a direction close to or away from the connecting plate, and the third limiting member is used to prevent the clamping plate from sliding.

[0015] Optionally, the connecting plate is provided with an anti-slip strip on the end face near the clamping plate, and the clamping plate is provided with an anti-slip pad at the end near the connecting plate.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. When it is necessary to support the bottom formwork of a cantilevered floor slab, multiple support structures are set up at the construction location. The fixing frame of the support structure is fixed to the lower floor slab. According to the distance between the bottom formwork of the cantilevered floor slab and the lower floor slab, the telescopic rod is driven to slide by the telescopic component. Then, the connecting plate is fixed to the steel beam of the bottom formwork by the fixing component, and the support rod is supported by the top support component to achieve support for the bottom formwork of the cantilevered floor slab. By using the support structure of this application to replace the original ground scaffolding support method, the construction is simplified, thereby shortening the construction cycle and improving the construction efficiency. Moreover, it is convenient to dismantle after the floor slab is poured and the demolding conditions are met.

[0018] 2. When the cantilever floor slab is being poured with concrete, the load on the sleeve increases. When the supporting structure needs to be removed, the locking sleeve is driven to slide, causing the locking sleeve to separate from the locking strip. Then, the locking strip is rotated, causing the locking block to disengage from the groove of the stress relief rod. At this time, the stress relief rod can slide on the second rod, thereby relieving the load between the first and second rods, which facilitates the removal of the supporting structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0020] Figure 2 This is a schematic diagram illustrating the structure of the support assembly in an embodiment of this application;

[0021] Figure 3 This is a cross-sectional view of the telescopic rod used in the embodiments of this application;

[0022] Figure 4 yes Figure 3 Enlarged view of section A;

[0023] Figure 5 This is a schematic diagram illustrating the structure of the connecting plate in an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Fixing frame; 11. First oblong hole; 12. Stabilizing frame; 121. Insertion groove; 13. First limiting component; 2. Support rod; 21. Connecting rod; 22. Adjusting screw; 221. Anti-slip texture; 23. Top support rod; 24. Sleeve rod; 3. Telescopic rod; 31. First rod body; 32. Second rod body; 321. Mounting groove; 322. Limiting groove; 323. Locking strip; 324. Locking block; 3241. Roller; 325. Locking sleeve; 326. Mounting port; 327. Second limiting component; 328. Elastic component; 33. Force relief rod; 331. Limiting block; 332. Slot; 4. Connecting plate; 41. Clamping plate; 42. Third limiting component; 43. Ear plate; 44. Anti-slip strip; 45. Anti-slip mat. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] This application discloses a bottom formwork support structure for cantilevered floor slabs. (Refer to...) Figure 1 It includes a fixed frame 1 fixed to the lower floor slab, a support rod 2 hinged to the fixed frame 1, a telescopic rod 3 slidably mounted on the support rod 2 along the length of the support rod 2, and a connecting plate 4 hinged to the telescopic rod 3. The rotation axis of the support rod 2 is horizontal. The support rod 2 is provided with a telescopic component for driving the telescopic rod 3 to extend and retract. The connecting plate 4 is provided with a fixing assembly for fixing the connecting plate 4 to the steel beam of the cantilever floor slab bottom formwork.

[0027] Reference Figure 1 , 2 The fixing frame 1 is L-shaped, and there are two first waist-shaped holes 11 on the fixing frame 1 for bolts to pass through. The fixing frame 1 is set in an L-shape to facilitate the adaptation to the structure of the lower floor slab. During installation, the fixing frame 1 is directly clipped to the edge of the lower floor slab, and bolts are inserted into both first waist-shaped holes 11. The fixing frame 1 is then fixedly connected to the lower floor slab by the bolts.

[0028] Reference Figure 2 The support rod 2 is provided with a top support assembly to prevent the support rod 2 from deflecting downward. The top support assembly includes a connecting rod 21, an adjusting screw 22, a top support rod 23, and a stabilizing frame 12. The connecting rod 21 is hinged to the support rod 2, and the rotation axis of the connecting rod 21 is parallel to the rotation axis of the support rod 2. The adjusting screw 22 is rotatably disposed on the end of the connecting rod 21 away from the support rod 2, and the length direction of the adjusting screw 22 is parallel to the length direction of the connecting rod 21. One end of the top support rod 23 is provided with a threaded groove adapted to the adjusting screw 22. The adjusting screw 22 passes through the threaded groove and is threadedly engaged with the top support rod 23. The length direction of the adjusting screw 22 is parallel to the length direction of the top support rod 23.

[0029] Reference Figure 2 The stabilizing frame 12 is slidably mounted on the fixed frame 1 in the horizontal direction. The fixed frame 1 is provided with a first limiting member 13 to prevent the stabilizing frame 12 from sliding. The first limiting member 13 includes a first bolt. Two first bolts are provided and fixed on the fixed frame 1. The stabilizing frame 12 has two second oblong holes. The second oblong holes correspond one-to-one with the first bolts, and the first bolts pass through the corresponding second oblong holes. Nuts are adapted to the first bolts. The stabilizing frame 12 has a plug groove 121 for inserting the top support rod 23. The plug groove 121 is adapted to the top support rod 23.

[0030] Reference Figure 2The side wall of the adjusting screw 22 is provided with anti-slip texture 221. By providing anti-slip texture 221 on the side wall of the adjusting screw 22, it is easy to rotate the adjusting screw 22. When the support rod 2 supports the ground membrane of the cantilever floor slab, the top support rod 23 is made vertical by rotating the connecting rod 21, and the stabilizing frame 12 is slid to make the top support rod 23 face the insertion groove 121 on the stabilizing frame 12. The nut on the first bolt is tightened to fix the stabilizing frame 12. Then, the adjusting screw 22 is rotated by the anti-slip texture 221 on the adjusting screw 22, and the adjusting screw 22 and the top support rod 23 rotate relative to each other. The end of the top support rod 23 away from the adjusting screw 22 is inserted into the insertion groove 121 and pressed against the bottom wall of the insertion groove 121, thereby preventing the support rod 2 from deflecting downward.

[0031] Reference Figure 3 , 4 The telescopic rod 3 includes a first rod body 31 and a second rod body 32. A stress relief rod 33 is fixedly installed at the end of the first rod body 31 away from the sleeve rod 24. The length direction of the stress relief rod 33 is parallel to the length direction of the first rod body 31. An installation groove 321 is opened at one end of the second rod body 32 along the length direction of the second rod body 32. The stress relief rod 33 slides through the installation groove 321. A limit block 331 is fixedly installed on the side wall of the stress relief rod 33. A limit groove 322 is opened on the side wall of the installation groove 321 along the length direction of the second rod body 32. The limit block 331 slides in the limit groove 322. A locking assembly for preventing the stress relief rod 33 from sliding is provided on the second rod body 32. A connecting plate 4 is hinged to the end of the second rod body 32 away from the first rod body 31.

[0032] As the load on the sleeve rod 24 increases during the concrete pouring of the cantilever floor slab, the friction between the first rod 31 and the sleeve rod 24 increases. When the support structure needs to be dismantled, the locking assembly is loosened, and the stress relief rod 33 can slide on the second rod 32, thereby relieving the load between the first rod 31 and the second rod 32. This facilitates the relative rotation between the sleeve rod 24 and the first rod 31, thus making the dismantling of the support structure easier.

[0033] Reference Figure 3 The telescopic component includes a sleeve rod 24, which is rotatably sleeved on the support rod 2, and the length direction of the sleeve rod 24 is parallel to the length direction of the support rod 2. The inner side wall of the sleeve rod 24 is provided with an internal thread, and the side wall of the first rod body 31 is provided with an external thread. The first rod body 31 passes through the sleeve rod 24 and is threadedly engaged with the sleeve rod 24. By rotating the sleeve rod 24 and causing relative rotation between the sleeve rod 24 and the first rod body 31, the first rod body 31 can be driven to slide towards or away from the support rod 2, thereby adjusting the distance between the connecting plate 4 and the fixing frame 1 according to the distance between the bottom formwork of the cantilever floor slab and the lower floor slab.

[0034] Reference Figure 4The locking assembly includes a locking bar 323 that rotates on the second rod 32, a locking block 324 that is fixedly mounted on the locking bar 323, and a locking sleeve 325 that is slidably mounted on the second rod 32. The side wall of the second rod 32 has an installation opening 326 that communicates with the installation groove 321. The locking bar 323 is rotatably mounted in the installation opening 326, and the rotation axis of the locking bar 323 is perpendicular to the length direction of the second rod 32.

[0035] Reference Figure 4 The side wall of the pressure relief rod 33 is provided with a slot 332 for the locking block 324 to be inserted. The first rod body 31 is provided with a second limiting member 327 for preventing the locking sleeve 325 from sliding. The second limiting member 327 includes a second bolt. The side wall of the locking sleeve 325 is provided with a through hole for the second bolt to pass through. The side wall of the second rod body 32 is provided with a threaded hole that matches the second bolt.

[0036] By driving the pressure relief rod 33 to slide within the mounting groove 321 of the second rod body 32, the retaining groove 332 on the pressure relief rod 33 is positioned at the mounting opening 326. Then, the locking bar 323 is rotated, causing the locking block 324 to insert into the retaining groove 332 of the pressure relief rod 33. Next, the locking sleeve 325 is slid, causing it to fit over and cover the mounting opening 326, preventing the locking bar 323 from deflecting away from the pressure relief rod 33, thereby preventing relative sliding between the pressure relief rod 33 and the second rod body 32. Finally, the pressure relief rod 33 is... Two bolts are simultaneously inserted into the through hole of the locking sleeve 325 and the threaded hole of the second rod 32 to limit the locking sleeve 325. When it is necessary to relieve the load between the stress relief rod 33 and the second rod 32, the second bolt is loosened and the locking sleeve 325 is slid to separate the locking sleeve 325 from the locking bar 323. Then the locking bar 323 can be rotated to disengage the locking block 324 from the slot 332 of the stress relief rod 33, thereby enabling relative sliding between the stress relief rod 33 and the second rod 32.

[0037] Reference Figure 4 The slot 332 has a guide slope on the side wall near the sleeve rod 24. The guide slope gradually approaches the sleeve rod 24 in the direction away from the stress relief rod 33. The slot 332 is adapted to the locking block 324. Multiple rollers 3241 are rotatably arranged on the locking block 324. The axial direction of the rollers 3241 is parallel to the rotation axis of the locking bar 323. When the locking sleeve 325 is separated from the locking bar 323, the locking block 324 is easily disengaged from the slot 332 of the stress relief rod 33 under the guidance of the guide slope and the rollers 3241. Therefore, it is not necessary for the staff to manually drive the locking bar 323 to rotate, making the support structure more convenient to dismantle.

[0038] Reference Figure 3 , 4The second rod 32 is provided with an elastic element 328 for driving the pressure relief rod 33 to slide away from the second rod 32. The elastic element 328 includes a compression spring, which is disposed in the mounting groove 321. One end of the compression spring abuts against the bottom wall of the mounting groove 321, and the other end of the compression spring abuts against the pressure relief rod 33. When the limiting block 331 abuts against the side wall of the limiting groove 322 away from the connecting plate 4, the locking strip 323 rotates so that the locking block 324 can be inserted into the slot 332 of the pressure relief rod 33.

[0039] Reference Figure 5 The fixing assembly includes a clamping plate 41 and a third limiting member 42. The third limiting member 42 includes a third bolt. Multiple ear plates 43 are fixedly provided on the connecting plate 4. Each ear plate 43 has multiple first mounting holes along the direction perpendicular to the ear plate 43. The first mounting holes are used for the third bolt to pass through. Multiple clamping plates 41 are provided, each corresponding to one of the ear plates 43. The clamping plates 41 have second mounting holes along the direction perpendicular to the clamping plates 41 for the third bolt to pass through. The third bolt is also fitted with a nut. The connecting plate 4 is abutted against the bottom wall of the steel beam, and the flange of the steel beam is located between the connecting plate 4 and the clamping plate 41. The third bolt is passed through the first mounting holes of the ear plates 43 and the second mounting holes of the clamping plates 41. The nut is fitted on the third bolt and the third bolt and the nut on the third bolt are tightened, thereby fixing the connecting plate 4 to the steel beam.

[0040] Reference Figure 5 Several anti-slip strips 44 are provided on the end face of the connecting plate 4 away from the second rod 32, and an anti-slip pad 45 is provided on the end face of the clamping plate 41 used to abut against the steel beam. The anti-slip pad 45 is made of rubber. By providing anti-slip strips 44 on the connecting plate 4, the connecting plate 4 abuts against the steel beam through the anti-slip strips 44, and the anti-slip pad 45 prevents relative sliding between the clamping plate 41 and the steel beam, thereby increasing the stability of the connecting plate 4 when it is fixed to the steel beam.

[0041] The implementation principle of the cantilever floor slab bottom formwork support structure in this application embodiment is as follows: When it is necessary to support the bottom formwork of the cantilever floor slab, multiple support structures are set at the construction position. The fixing frame 1 of the support structure is clamped at the edge of the lower floor slab. Bolts are inserted into the two first waist-shaped holes 11, and the fixing frame 1 is fixedly connected to the lower floor slab through the bolts. According to the distance between the bottom formwork of the cantilever floor slab and the lower floor slab, the sleeve rod 24 is rotated, and the sleeve rod 24 and the first rod body 31 are rotated relative to each other, thereby driving the first rod body 31 to slide closer to or away from the support rod 2, adjusting the distance between the connecting plate 4 and the fixing frame 1, and making the connecting plate 4 abut against the bottom wall of the steel beam. Then, the clamping plate 41 is set at the position of each ear plate 43 respectively. The wing plate of the steel beam is located between the ear plate 43 and the clamping plate 41. The third bolt is passed through the first mounting hole of the ear plate 43 and the second mounting hole of the clamping plate 41, and a nut is put on the third bolt. The third bolt and the nut on the third bolt are tightened, thereby fixing the connecting plate 4 to the steel beam.

[0042] Then, by rotating the connecting rod 21, the top support rod 23 is made vertical, and the stabilizing frame 12 is slid to make the top support rod 23 aligned with the insertion slot 121 on the stabilizing frame 12. The nut on the first bolt is tightened to fix the stabilizing frame 12. Then, by adjusting the anti-slip groove 221 on the adjusting screw 22, the adjusting screw 22 and the top support rod 23 are rotated relative to each other. The end of the top support rod 23 away from the adjusting screw 22 is inserted into the insertion slot 121 and pressed against the bottom wall of the insertion slot 121, thereby preventing the support rod 2 from deflecting downward, and thus supporting the support rod 2 to achieve support for the bottom formwork of the cantilever floor slab. By using the support structure of this application to replace the original ground scaffolding support method, the construction is simplified, the construction cycle is shortened, the construction efficiency is improved, and the formwork is easily removed after the floor slab is poured and the demolding conditions are met.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bottom formwork support structure for a cantilevered floor slab, characterized in that: The system includes a fixed frame (1) fixed to the lower floor slab, a support rod (2) hinged to the fixed frame (1), a telescopic rod (3) slidably arranged on the support rod (2) along the length direction of the support rod (2), a telescopic component for driving the telescopic rod (3) to extend and retract on the support rod (2), a connecting plate (4) hinged to the telescopic rod (3), a fixing assembly for fixing the connecting plate (4) to the steel beam on the connecting plate (4), and a top support assembly for preventing the support rod (2) from deflecting downwards on the support rod (2). The telescopic component includes a sleeve rod (24), which is rotatably sleeved on the support rod (2). The inner side wall of the sleeve rod (24) is provided with an internal thread, and the side wall of the telescopic rod (3) is provided with an external thread. The telescopic rod (3) passes through the sleeve rod (24) and is threadedly engaged with the sleeve rod (24). The telescopic rod (3) includes a first rod body (31) and a second rod body (32). The first rod body (31) is threadedly engaged with the sleeve rod (24), and the second rod body (32) is hinged to the connecting plate (4). A pressure relief rod (33) is fixedly installed on the first rod body (31). The pressure relief rod (33) is slidably installed on the second rod body (32) along the length direction of the second rod body (32). A locking assembly for preventing the pressure relief rod (33) from sliding is provided on the second rod body (32). The locking assembly includes a locking bar (323) that rotates on the second rod (32), a locking block (324) fixedly disposed on the locking bar (323), and a locking sleeve (325) that slides on the second rod (32). The side wall of the stress relief rod (33) is provided with a slot (332) for the locking block (324) to be inserted. The locking sleeve (325) is used to be sleeved on the locking bar (323). The first rod (31) is provided with a second limiting member (327) for preventing the locking sleeve (325) from sliding. The slot (332) has a guide slope on the side wall near the sleeve rod (24). The guide slope gradually approaches the sleeve rod (24) in a direction away from the force relief rod (33). The locking block (324) is adapted to the slot (332).

2. The bottom formwork support structure for a cantilevered floor slab according to claim 1, characterized in that: The top support assembly includes a connecting rod (21) hinged to the support rod (2), an adjusting screw (22) rotatably mounted on the connecting rod (21), a top support rod (23) sleeved on the adjusting screw (22), and a stabilizing frame (12) slidably mounted on the fixed frame (1). The top support rod (23) is threadedly engaged with the adjusting screw (22). The stabilizing frame (12) has an insertion slot (121) for inserting the top support rod (23). The fixed frame (1) has a first limiting member (13) for preventing the stabilizing frame (12) from sliding.

3. The bottom formwork support structure for a cantilevered floor slab according to claim 1, characterized in that: A roller (3241) is rotatably mounted on the locking block (324). The axial direction of the roller (3241) is parallel to the rotation axis of the locking bar (323), and the roller (3241) is used for rolling connection with the guide slope.

4. The bottom formwork support structure for a cantilevered floor slab according to claim 1, characterized in that: The second rod (32) is provided with an elastic element (328) for driving the stress relief rod (33) to slide away from the second rod (32).

5. The bottom formwork support structure for a cantilevered floor slab according to claim 1, characterized in that: The fixing component includes a clamping plate (41) and a third limiting member (42). The clamping plate (41) is slidably disposed on the connecting plate (4) in a direction close to or away from the connecting plate (4). The third limiting member (42) is used to prevent the clamping plate (41) from sliding.

6. The bottom formwork support structure for a cantilevered floor slab according to claim 5, characterized in that: The connecting plate (4) is provided with an anti-slip strip (44) on the end face near the clamping plate (41), and the clamping plate (41) is provided with an anti-slip pad (45) at the end near the connecting plate (4).

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