Construction method for detachable bottom formwork steel bar truss floor deck

Abstract

The present application relates to the field of building construction, and specifically to a construction method for a detachable bottom formwork steel bar truss floor deck. A quick-release lock connecting member and quick-release lock structure suitable for quick installation or separation between a steel bar truss and a detachable bottom formwork is designed. During use, a push rod and ejector rods in a quick-release lock are rotated when the push rod is dragged upwards while the ejector rods are ejected by means of the function of automatic telescopic locking mechanisms, so as to achieve quick locking or separation between the detachable bottom formwork and a quick-release lock connecting member, the range of application is wide, construction is convenient, the construction period is shortened, and construction costs are reduced.

Description

Construction method of removable bottom formwork steel truss floor deck Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a construction method for a removable bottom formwork steel truss floor slab. Background Technology

[0002] Compared to traditional steel truss floor decking, removable bottom-type steel truss floor decking solves problems such as the lack of suspended ceiling decoration, deformation of the bottom formwork, and easy damage to the floor decking during transportation, and is therefore gradually becoming more common in construction. However, in existing removable bottom-type steel truss floor decking, the bottom formwork and steel truss are fixedly connected by bolts. This means that during the actual installation and removal of the bottom formwork, workers need to tighten the fixing bolts one by one to complete the installation or removal work, which involves a large amount of work, greatly affects the construction progress, and increases the construction cost. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a construction method for a removable bottom formwork steel truss floor slab.

[0004] This application provides a construction method for a removable bottom formwork steel truss floor slab, comprising:

[0005] Determine the reinforcement specifications and the thickness of the removable bottom formwork in the steel truss;

[0006] According to the reinforcement specifications, quick-release lock connectors are made. The quick-release lock connectors include a beveled notch and a U-shaped notch at the top for fixing the steel truss, and a connector lock opening at the bottom. Connector lock clips are provided on the bottom inner side of the connector lock opening.

[0007] The quick-release lock is manufactured according to the specifications of the quick-release lock connector and the thickness of the removable bottom mold. The quick-release lock includes a cylindrical shell with an open top surface. The bottom surface of the shell has a shell notch, through which a push rod passes. The open end of the shell has a shell stabilizing plate, and the shell stabilizing plate has a through hole opposite to the shell notch. A push rod passes through the through hole. The push rod and the inner end of the push rod in the shell are connected by an automatic telescopic locking mechanism. The top side of the push rod has a push rod locking clip that matches the connector locking clip.

[0008] The bottom chord reinforcement on one side of the steel truss is cut into a U-shaped notch from the side, and the bottom chord reinforcement on the other side is pressed into a U-shaped notch to complete the snap-fit ​​fixation;

[0009] The steel truss with the snap-fit ​​fixed is laid on the detachable bottom formwork. During the laying process, the locking joints of the connectors are aligned with the pre-drilled holes on the detachable bottom formwork.

[0010] Insert the quick-release lock through the plate hole into the connector lock slot from below the detachable bottom formwork. During insertion, the outer shell stabilizing plate fits against the detachable bottom formwork. Push the push rod upward, which in turn drives the top rod upward through the automatic telescopic locking mechanism. The top rod lock passes through the gap between the connector locks. After being pushed into place, release the push rod. The top rod resets downward under the action of the automatic telescopic locking mechanism. At the same time, the top rod rotates under the action of the automatic telescopic locking mechanism during the reset process. Finally, the top rod lock is locked on the connector lock to complete the locking and fixation, thereby fixing the steel truss to the detachable bottom formwork.

[0011] The floor decking is constructed using fixed steel trusses and removable bottom formwork, following standard procedures.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: the automatic telescopic locking mechanism between the push rod and the top rod enables the push rod to be pulled upward and rotated at the same time, thereby realizing the quick locking or separation of the detachable bottom mold and the quick-release locking device. It has a wide range of applications, is convenient for construction, shortens the construction cycle, and reduces construction costs.

[0013] Optionally, the automatic telescopic locking mechanism includes a spring, a push rod transmission rod, a push rod transmission rod, and a locking rib arranged on the inner wall of the housing along the axial direction of the housing. The push rod transmission rod is coaxially connected to the push rod. The spring is sleeved on the push rod and its two ends abut against the housing stabilizing plate and the push rod transmission rod, respectively. The push rod transmission rod is coaxially connected to the push rod. The circumferential surface of the push rod transmission rod is provided with a push rod locking groove and a push rod unlocking groove at intervals. One inner side of the push rod locking groove is arc-shaped, and a transition arc section is provided from the groove on the side away from the arc-shaped inner side of the push rod locking groove to the middle of the push rod unlocking groove. The push rod unlocking groove is adapted to the locking rib. The circumferential surface of the push rod transmission rod is provided with a push rod linkage groove and a push rod sliding groove at intervals. The push rod linkage groove is adapted to the transition arc section and one side is connected to the middle of the push rod sliding groove. The push rod sliding groove maintains sliding cooperation with the locking rib.

[0014] In the unused state, the upper part of the locking shank passes through the top rod unlocking slot. When the quick-release lock is used for locking, the push rod pushes the push rod transmission rod upward. The push rod linkage slot in the push rod transmission rod contacts the transition arc section, pushing the top rod transmission rod upward and compressing the spring. When the top rod unlocking slot disengages from the locking shank upward, the top rod transmission rod rotates once under the cooperation of the push rod linkage slot and the transition arc section. The top rod unlocking slot crosses the locking shank in the circumferential direction. After that, the push rod is released, and the top rod transmission rod returns to its original position under the action of the spring. During the return process, the arc-shaped inner side of the top rod locking slot contacts the top of the locking shank, resulting in a sliding fit. This causes the top rod transmission rod to rotate a second time. At the same time, the top of the locking shank slides to the bottom of the top rod locking slot, and the top rod lock engages with the connector lock to complete the locking.

[0015] Optionally, when the quick-release lock needs to be removed after the floor decking construction is completed, the push rod is pushed upward again by the push rod drive rod. The push rod linkage groove in the push rod drive rod contacts the arc-shaped inner side of the top rod locking groove, pushing the top rod drive rod upward. When the top rod locking groove disengages from the locking rib upward, the top rod drive rod rotates once under the cooperation of the push rod linkage groove and the arc-shaped inner side. The top rod locking groove crosses the locking rib in the circumferential direction. After that, the push rod is released, and the top rod drive rod returns to its original position under the action of the spring. During the return process, the transition arc segment contacts the top of the locking rib, resulting in a sliding fit, which causes the top rod drive rod to rotate a second time. The locking rib slides into the top rod unlocking groove, and at the same time, the top rod lock disengages from the connecting piece lock to complete the unlocking.

[0016] Optionally, the inner end of the push rod transmission rod is coaxially provided with a push rod alignment post, and the push rod transmission rod is a hollow structure with an open inner end, with the lower part of the push rod alignment post inserted into the push rod transmission rod.

[0017] Optionally, the bottom end of the push rod transmission rod is connected to the push rod via a push rod stabilizing column, and a push rod limiting plate is provided at the bottom end of the push rod stabilizing column.

[0018] Optionally, the push rod sliding groove and the top rod unlocking groove have the same width.

[0019] Optionally, both the connector locking clip and the top rod locking clip have a fan-shaped cross-section.

[0020] Optionally, the top of the locking rib is an arc surface adapted to the transition arc segment.

[0021] Optionally, the push rod drive rod and the push rod are connected by threads, and the housing and the housing stabilizer are connected by threads. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the application. In the drawings:

[0023] Figure 1 is a schematic diagram of a steel truss and a detachable bottom formwork locked together according to an embodiment of this application;

[0024] Figure 2 is a structural schematic diagram of a quick-release lock provided in an embodiment of this application;

[0025] Figure 3 is a schematic diagram of a top rod structure provided in an embodiment of this application;

[0026] Figure 4 is a schematic diagram of a push rod transmission rod structure provided in an embodiment of this application;

[0027] Figure 5 is a schematic diagram of the cooperation structure between the push rod and the push rod according to an embodiment of this application.

[0028] Figure 6 is a schematic diagram of the cooperation structure between the push rod and the push rod according to an embodiment of this application.

[0029] Figure 7 is a schematic diagram of the main structure of a quick-release lock connector provided in an embodiment of this application;

[0030] Figure 8 is a bottom view of a quick-release lock connector provided in an embodiment of this application.

[0031] The components include: 1. Steel truss; 2. Demountable bottom formwork; 3. Quick-release lock connector; 4. Corner notch; 5. U-shaped notch; 6. Connector lock; 7. Connector lock clip; 8. Quick-release lock; 9. Outer shell; 10. Outer shell notch; 11. Push rod; 12. Outer shell stabilizing plate; 13. Top rod; 14. Automatic telescopic locking mechanism; 15. Top rod lock clip; 16. Lower chord steel bar; 17. Plate hole; 18. Spring; 19. Top rod transmission rod; 20. Push rod transmission rod; 21. Locking rib; 22. Top rod locking groove; 23. Top rod unlocking groove; 24. Arc-shaped inner surface; 25. Transition arc segment; 26. Push rod linkage groove; 27. Push rod sliding groove; 28. Top rod alignment column; 29. ​​Push rod stabilizing column; 30. Push rod limiting plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0033] Referring to Figures 1-8, an embodiment of this application provides a construction method for a removable bottom formwork steel truss floor slab, comprising:

[0034] Determine the reinforcement specifications in steel truss 1 and the thickness of removable bottom formwork 2;

[0035] According to the reinforcement specifications, quick-release lock connector 3 is made. Quick-release lock connector 3 includes a beveled notch 4 and a U-shaped notch 5 set at the top for fixing the steel truss 1, and a connector lock opening 6 is opened at the bottom. Connector lock clips 7 are set at opposite sides of the bottom of the connector lock opening 6.

[0036] According to the specifications of the quick-release lock connector 3 and the thickness of the detachable bottom mold 2, the quick-release lock 8 is made. The quick-release lock 8 includes a cylindrical shell 9 with an open top surface. The bottom surface of the shell 9 is provided with a shell notch 10. A push rod 11 is inserted through the shell notch 10. A shell stabilizing plate 12 is provided at the open end of the shell 9. A through hole is provided on the shell stabilizing plate 12 opposite to the shell notch 10. A push rod 13 is inserted through the through hole. The inner ends of the push rod 11 and the push rod 13 in the shell 9 are connected by an automatic telescopic locking mechanism 14. A push rod locking plate 15 adapted to the connector locking plate 7 is provided on the side of the top of the push rod 13.

[0037] The lower chord steel bar 16 on one side of the steel truss 1 is cut into the bend-shaped notch 4 from the side, and the lower chord steel bar 16 on the other side is pressed into the U-shaped notch 5 to complete the snap-fit ​​fixation;

[0038] The steel truss 1, which has been fixed by snap-fit, is laid on the detachable bottom formwork 2. During the laying process, the locking joint 6 of the connector is aligned with the pre-drilled plate hole 17 on the detachable bottom formwork 2.

[0039] The quick-release lock 8 is inserted into the connector lock port 6 through the plate hole 17 from below the detachable bottom mold 2. During the insertion process, the outer shell stabilizing plate 12 fits against the detachable bottom mold 2. The push rod 11 is pushed upward, which in turn drives the top rod 13 upward through the automatic telescopic locking mechanism 14. The top rod locking clip 15 passes through the gap between the connector locking clips 7. After being pushed into place, the push rod 11 is released. The top rod 13 is reset downward under the action of the automatic telescopic locking mechanism 14. At the same time, during the reset process, the top rod 13 rotates under the action of the automatic telescopic locking mechanism 14. Finally, the top rod locking clip 15 is locked on the connector locking clip 7 to complete the locking and fixing, thereby fixing the steel truss 1 to the detachable bottom mold 2.

[0040] The floor deck is constructed using the fixed steel truss 1 and the removable bottom formwork 2 according to the conventional procedures, including setting up a support frame under the removable bottom formwork 2 and pouring concrete on the removable bottom formwork 2.

[0041] In implementation, the automatic telescopic locking mechanism 14 includes a spring 18, a push rod transmission rod 19, a push rod transmission rod 20, and a locking rib 21 arranged on the inner wall of the outer casing 9 along the axial direction of the outer casing 9. The push rod transmission rod 19 is coaxially connected to the push rod 13. The spring 18 is sleeved on the push rod 13 and its two ends abut against the outer casing stabilizing plate 12 and the push rod transmission rod 19, respectively. The push rod transmission rod 20 is coaxially connected to the push rod 11. The circumferential surface of the push rod transmission rod 19 is provided with push rod locking grooves 22 and push rod unlocking grooves 23 at intervals. One inner side of the top rod locking groove 22 is arc-shaped, and a transition arc section 25 is provided from the groove on the side away from the arc-shaped inner side 24 in the top rod locking groove 22 to the middle of the top rod unlocking groove 23. The top rod unlocking groove 23 is adapted to the locking rib 21. The push rod transmission rod 20 is provided with a push rod linkage groove 26 and a push rod sliding groove 27 at intervals on its circumference. The push rod linkage groove 26 is adapted to the transition arc section 25 and one side is connected to the middle of the push rod sliding groove 27. The push rod sliding groove 27 maintains a sliding fit with the locking rib 21.

[0042] In the unused state, the upper part of the locking shank 21 passes through the top rod unlocking groove 23. When the quick-release lock 8 is used for locking, the push rod 11 pushes the push rod transmission rod 20 upward. The push rod linkage groove 26 in the push rod transmission rod 20 contacts the transition arc section 25, pushing the top rod transmission rod 19 upward and compressing the spring 18. When the top rod unlocking groove 23 disengages from the locking shank 21 upward, the top rod transmission rod 19 rotates once under the cooperation of the push rod linkage groove 26 and the transition arc section 25. The top rod unlocking groove 23 passes over the locking shank 21 in the circumferential direction. After that, the push rod 11 is released, and the top rod transmission rod 19 returns to its original position under the action of the spring 18. During the return process, the arc-shaped inner side 24 in the top rod locking groove 22 contacts the top of the locking shank 21, resulting in a sliding fit, which causes the top rod transmission rod 19 to rotate a second time. When the top of the locking shank 21 slides to the bottom of the top rod locking groove 22, the top rod lock 15 locks onto the connecting lock 7 to complete the locking.

[0043] During implementation, when the quick-release lock 8 needs to be removed after the floor decking construction is completed, the push rod 11 pushes the push rod transmission rod 20 upward again. The push rod linkage groove 26 in the push rod transmission rod 20 contacts the arc-shaped inner side 24 in the top rod locking groove 22, pushing the top rod transmission rod 19 upward. When the top rod locking groove 22 disengages from the locking rib 21, the top rod transmission rod 19 rotates once under the cooperation of the push rod linkage groove 26 and the arc-shaped inner side 24. The top rod locking groove 22 passes over the locking rib 21 in the circumferential direction. After that, the push rod 11 is released, and the top rod transmission rod 19 returns to its original position under the action of the spring 18. During the resetting process, the transition arc section 25 contacts the top of the locking rib 21, resulting in a sliding fit, which causes the top rod transmission rod 19 to rotate a second time. The locking rib 21 slides into the top rod unlocking groove 23, and at the same time, the top rod lock 15 disengages from the connecting piece lock 7, completing the unlocking.

[0044] In practice, the inner end of the push rod transmission rod 19 is coaxially provided with a push rod alignment post 28, and the push rod transmission rod 20 is a hollow structure with an open inner end. The lower part of the push rod alignment post 28 is inserted into the push rod transmission rod 20.

[0045] In practice, the bottom end of the push rod transmission rod 20 is connected to the push rod 11 through the push rod stabilizing column 29, and the bottom end of the push rod stabilizing column 29 is provided with a push rod limiting piece 30.

[0046] In practice, the push rod sliding groove 27 and the top rod unlocking groove 23 have the same width.

[0047] In practice, the cross-sections of both the connector locking clip 7 and the top rod locking clip 15 are fan-shaped.

[0048] During implementation, the top of the locking rib 21 has an arc surface that matches the transition arc segment 25, which is more conducive to achieving a sliding fit.

[0049] In practice, the push rod transmission rod 19 and the push rod 13 are connected by threads, and the outer shell 9 and the outer shell stabilizing plate 12 are connected by threads, which facilitates disassembly and replacement of the spring 18.

[0050] The solution provided in this application embodiment uses an automatic telescopic locking mechanism 14 between the push rod 11 and the top rod 13 to make the push rod 11 rotate while being pulled upward, thereby realizing the quick locking or separation of the detachable bottom mold 2 and the quick-release locking connector 3. It has a wide range of applications, is easy to construct, shortens the construction cycle, and reduces construction costs.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A construction method of a detachable bottom mold steel bar truss floor support plate, characterized in that, include: Determine the reinforcement specifications and the thickness of the removable bottom formwork in the steel truss; According to the reinforcement specifications, quick-release lock connectors are made. The quick-release lock connectors include a beveled notch and a U-shaped notch at the top for fixing the steel truss, and a connector lock opening at the bottom. Connector lock clips are provided on the bottom inner side of the connector lock opening. The quick-release lock is manufactured according to the specifications of the quick-release lock connector and the thickness of the removable bottom mold. The quick-release lock includes a cylindrical shell with an open top surface. The bottom surface of the shell has a shell notch, through which a push rod passes. The open end of the shell has a shell stabilizing plate, and the shell stabilizing plate has a through hole opposite to the shell notch. A push rod passes through the through hole. The push rod and the inner end of the push rod in the shell are connected by an automatic telescopic locking mechanism. The top side of the push rod has a push rod locking clip that matches the connector locking clip. The bottom chord reinforcement on one side of the steel truss is cut into a U-shaped notch from the side, and the bottom chord reinforcement on the other side is pressed into a U-shaped notch to complete the snap-fit ​​fixation; The steel truss with the snap-fit ​​fixed is laid on the detachable bottom formwork. During the laying process, the locking joints of the connectors are aligned with the pre-drilled holes on the detachable bottom formwork. Insert the quick-release lock through the plate hole into the connector lock slot from below the detachable bottom formwork. During insertion, the outer shell stabilizing plate fits against the detachable bottom formwork. Push the push rod upward, which in turn drives the top rod upward through the automatic telescopic locking mechanism. The top rod lock passes through the gap between the connector locks. After being pushed into place, release the push rod. The top rod resets downward under the action of the automatic telescopic locking mechanism. At the same time, the top rod rotates under the action of the automatic telescopic locking mechanism during the reset process. Finally, the top rod lock is locked on the connector lock to complete the locking and fixation, thereby fixing the steel truss to the detachable bottom formwork. The floor decking is constructed using fixed steel trusses and removable bottom formwork, following standard procedures.

2. The construction method of the removable bottom form steel bar truss floor support plate according to claim 1, characterized in that, The automatic telescopic locking mechanism includes a spring, a push rod transmission rod, a push rod transmission rod, and a locking rib arranged on the inner wall of the housing along the axial direction of the housing. The push rod transmission rod is coaxially connected to the push rod. The spring is sleeved on the push rod and its two ends abut against the housing stabilizing plate and the push rod transmission rod, respectively. The push rod transmission rod is coaxially connected to the push rod. The circumferential surface of the push rod transmission rod is provided with a push rod locking groove and a push rod unlocking groove at intervals. One inner side of the push rod locking groove is arc-shaped, and a transition arc section is provided from the groove on the side away from the arc-shaped inner side of the push rod locking groove to the middle of the push rod unlocking groove. The push rod unlocking groove is adapted to the locking rib. The circumferential surface of the push rod transmission rod is provided with a push rod linkage groove and a push rod sliding groove at intervals. The push rod linkage groove is adapted to the transition arc section and one side is connected to the middle of the push rod sliding groove. The push rod sliding groove maintains a sliding fit with the locking rib. In the unused state, the upper part of the locking shank passes through the top rod unlocking slot. When the quick-release lock is used for locking, the push rod pushes the push rod transmission rod upward. The push rod linkage slot in the push rod transmission rod contacts the transition arc section, pushing the top rod transmission rod upward and compressing the spring. When the top rod unlocking slot disengages from the locking shank upward, the top rod transmission rod rotates once under the cooperation of the push rod linkage slot and the transition arc section. The top rod unlocking slot crosses the locking shank in the circumferential direction. After that, the push rod is released, and the top rod transmission rod returns to its original position under the action of the spring. During the return process, the arc-shaped inner side of the top rod locking slot contacts the top of the locking shank, resulting in a sliding fit. This causes the top rod transmission rod to rotate a second time. At the same time, the top of the locking shank slides to the bottom of the top rod locking slot, and the top rod lock engages with the connector lock to complete the locking.

3. The construction method of the removable bottom form steel bar truss floor support plate according to claim 2, characterized in that, When the quick-release lock needs to be removed after the floor decking construction is completed, push the push rod drive rod upward again using the push rod. The push rod linkage groove in the push rod drive rod contacts the arc-shaped inner side of the top rod locking groove, pushing the top rod drive rod upward. When the top rod locking groove disengages from the locking rib upward, the top rod drive rod rotates once under the cooperation of the push rod linkage groove and the arc-shaped inner side. The top rod locking groove crosses the locking rib in the circumferential direction. After that, release the push rod, and the top rod drive rod returns to its original position under the action of the spring. During the return process, the transition arc segment contacts the top of the locking rib, resulting in a sliding fit. This causes the top rod drive rod to rotate a second time, and the locking rib slides into the top rod unlocking groove. At the same time, the top rod lock disengages from the connecting piece lock, completing the unlocking.

4. The method of claim 2, wherein the removable bottom form steel joist deck is constructed by: The inner end of the push rod transmission rod is coaxially equipped with a push rod alignment post, and the push rod transmission rod is a hollow structure with an open inner end. The lower part of the push rod alignment post is inserted into the push rod transmission rod.

5. The method of claim 2, wherein the removable bottom form steel joist deck is constructed by: The bottom end of the push rod transmission rod is connected to the push rod through the push rod stabilizing column, and the bottom end of the push rod stabilizing column is provided with a push rod limiting plate.

6. The method of claim 2, wherein the removable form steel joist floor deck is constructed by: The push rod sliding groove and the top rod unlocking groove have the same width.

7. The method of claim 2, wherein the method further comprises: providing a plurality of steel reinforcement bars; and placing the plurality of steel reinforcement bars in the form of a grid pattern on the bottom of the mold. Both the connector locking clip and the top rod locking clip have a fan-shaped cross-section.

8. The construction method of the detachable bottom formwork steel truss floor slab as described in claim 2, characterized in that, The top of the locking rib has an arc surface that matches the transition arc segment.

9. The construction method of the detachable bottom formwork steel truss floor slab as described in claim 2, characterized in that, The push rod and the push rod are connected by a thread, and the outer shell and the outer shell stabilizing plate are connected by a thread.

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