A formwork structure for post-casting strip of floor slab

Abstract

The present application discloses a formwork structure for post-casting strips of floor slabs, which relates to the field of building construction, and includes a bottom formwork, a supporting formwork, and a connecting piece, wherein the supporting formwork is symmetrically arranged on the surface of the bottom formwork, and the supporting formwork is arranged in an array along the length direction of the bottom formwork; the connecting piece is used to connect two symmetrically arranged supporting formworks together; the supporting formwork includes an upper formwork, a middle formwork, and a lower formwork that are detachably arranged from top to bottom, wherein a plurality of semicircular holes are provided at the upper end of the lower formwork, a plurality of semicircular holes are provided at the lower end of the upper formwork, and semicircular holes are provided at both the upper and lower ends of the middle formwork, and spaces for steel bars to pass through are formed between adjacent semicircular holes; a receiving groove is provided on the bottom formwork, and the lower formwork can abut against the receiving groove, and when the lower formwork abuts against the receiving groove, the surface of the bottom formwork forms a complete plane. The formwork in the present application can be reused.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a formwork structure for supporting a post-casting strip of a floor slab. Background Art

[0002] At present, in the construction process of some floor slab pouring, in order to reduce harmful cracks caused by uneven shrinkage or deformation and expansion of the poured concrete structure itself, post-pouring joints are set during construction.

[0003] In the related art, the post-casting strip needs to be supported by formwork. The post-casting strip formwork mainly includes a base plate and vertical formworks installed on both sides of the base plate. In the construction of the floor slab, two layers of steel bars are usually tied. The vertical formworks are provided with holes for the steel bars to pass through. The post-casting strip is formed between the vertical formworks on both sides. After the floor slab concrete has been poured for a predetermined period of time, the vertical formworks are removed, and then the post-casting strip is filled with concrete.

[0004] When the vertical formwork is removed later, it is difficult to remove the vertical formwork due to the large number of steel bars inserted between the post-cast strips. Usually, the vertical formwork is destroyed during the removal, resulting in low reuse rate of the vertical formwork. Summary of the invention

[0005] In order to reduce the damage to the formwork caused by disassembly, the present application provides a formwork structure for supporting the post-cast strip of the floor slab.

[0006] The present application provides a formwork structure for post-casting strips of floor slabs, which adopts the following technical solutions:

[0007] A floor post-casting strip formwork structure comprises a bottom formwork, a supporting formwork and a connecting piece, wherein the supporting formwork is symmetrically arranged on the surface of the bottom formwork and arranged in an array along the length direction of the bottom formwork; the connecting piece is used to connect two symmetrically arranged supporting formworks together;

[0008] The supporting formwork includes an upper formwork, a middle formwork and a lower formwork which are detachably arranged from top to bottom. A plurality of semicircular holes are provided at the upper end of the lower formwork, a plurality of semicircular holes are provided at the lower end of the upper formwork, and semicircular holes are provided at both the upper and lower ends of the middle formwork, and spaces for steel bars to pass through are formed between adjacent semicircular holes. A receiving groove is provided on the bottom formwork, and the lower formwork can abut against the receiving groove, and when the lower formwork abuts against the receiving groove, the surface of the bottom formwork forms a complete plane.

[0009] By adopting the above technical solution, the supporting formwork includes an upper formwork, a middle formwork and a lower formwork that can be detachably arranged from top to bottom, and the semicircular holes enclose a space for the steel bars to pass through. When the supporting formwork is disassembled, the upper formwork is removed, the middle formwork is tilted out from between the steel bars, and the lower formwork does not need to be taken out. The lower formwork is abutted against the accommodating groove, so that the bottom formwork forms a complete plane, so that the lower formwork does not need to be taken out, thereby making it difficult to damage the formwork during disassembly and the formwork can be reused.

[0010] Optionally, the connecting member includes a cross bar and a vertical bar connected to both ends of the cross bar, the cross bar is connected to the steel bar, the vertical bar is rotatably connected to a rotating cylinder, the rotating cylinder is threadedly connected to the cross bar, the upper template, the middle template and the lower template are all provided with a clamping groove, and the side wall of the vertical bar is provided with a clamping block that can abut against the clamping groove.

[0011] By adopting the above technical solution, by rotating the rotating cylinder, the vertical rod is pressed against the supporting formwork, and the clamping block is clamped in the clamping groove. Under the action of the cross bar, the supporting formwork is more stable when pouring concrete.

[0012] Optionally, the side wall of the cross bar is provided with a first seat, the first seat is connected to a second seat, the second seat is penetrated by a first bolt, the first bolt is threadedly connected to the first seat, and the steel bar is clamped between the first seat and the second seat.

[0013] By adopting the above technical solution, the cross bar is connected to the steel bar through the first block and the second block, so that the cross bar is not prone to sliding.

[0014] Optionally, a first protrusion is provided on the upper template, a second protrusion is provided on the middle template, a third protrusion is provided on the lower template, and a positioning rod is passed through the first protrusion, the positioning rod passes through the second protrusion and is threadedly connected to the third protrusion, and the upper end of the positioning rod is pressed against the surface of the first protrusion.

[0015] By adopting the above technical solution, the positioning rod passes through the first bump, the second bump and the third bump in sequence, and the upper end of the positioning rod abuts against the surface of the first bump, thereby connecting the three templates together.

[0016] Optionally, an extension strip is provided on the side wall of the lower template, and the extension strip is provided with an installation groove, and the installation groove runs through the upper and lower sides of the extension strip, and a positioning column is provided in the installation groove for sliding up and down, and a plug-in groove is provided on the accommodating groove, and a third protrusion extends from the lower end of the positioning rod and can abut against the upper end of the positioning column, and the positioning column can be pressed by the positioning rod and plugged into the plug-in groove, and a first spring is provided in the installation groove, and when the positioning rod and the positioning column are out of contact, the positioning column can return to the installation groove.

[0017] By adopting the above technical solution, the lower end of the positioning column is inserted into the installation groove, and the positioning column is driven to slide downward, so that the positioning column is inserted into the insertion groove. Under the action of the positioning column, the stability of the supporting formwork can be improved, and under the action of the positioning column, the force of the first block and the second block clamping on the steel bar is increased, so that the first block and the second block are not easy to rotate on the steel bar.

[0018] Optionally, a clearance groove and an open slot are provided in the accommodating groove, and when the lower template is received in the accommodating groove, the extension bar can be inserted into the clearance groove, and the third protrusion can be inserted into the open slot, and a sliding groove is provided on the inner wall of the clearance groove, and a driving rod is slidably arranged in the sliding groove, and a second spring is also provided in the sliding groove, and the second spring drives one end of the driving rod to extend into the clearance groove, and a connecting groove is also provided between the clearance groove and the open slot, and a sliding rod is slidably arranged in the connecting groove, and a third spring is provided between the side wall of the connecting groove and the sliding rod, and when the extension bar abuts against the clearance groove, the second spring can drive the driving rod to slide, so that one end of the driving rod is inserted into the installation groove, and one end of the positioning column is pressed by the driving rod and abuts against the end of the sliding rod, driving one end of the sliding rod to be inserted into the third protrusion.

[0019] By adopting the above technical solution, the driving rod is inserted into the installation groove, the positioning column is inserted into the connecting groove, and the driving sliding rod is inserted into the third protrusion, thereby improving the stability of the lower template installed on the bottom template.

[0020] Optionally, a fixing plate is provided at the upper end of the vertical rod, and a second bolt threadedly connected to the surface of the upper template is passed through the fixing plate.

[0021] By adopting the above technical solution, the supporting effect of the supporting formwork is improved.

[0022] Optionally, the clamping block is a right-angle structure, and the clamping groove is a structure that matches the clamping block.

[0023] By adopting the above technical solution, the upper template, the middle template and the lower template are more stable.

[0024] Optionally, an operating groove penetrating the sliding groove is provided on the lower surface of the bottom template, and an operating rod extending from the operating groove is provided on the driving rod.

[0025] By adopting the above technical solution, the lower template can be easily disassembled through the operating rod.

[0026] In summary, the present application includes at least one of the following beneficial effects:

[0027] 1. The upper formwork and the middle formwork can be taken out from the post-casting strip, and the lower formwork can be spliced ​​on the bottom formwork, so it does not need to be taken out from the post-casting strip. The supporting formwork is obtained by splicing three formworks, so that it does not need to be destroyed during disassembly, thereby improving its reuse rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of a card connection block in an embodiment of the present application;

[0030] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present application;

[0031] Figure 4 yes Figure 2 The enlarged schematic diagram at A in the middle;

[0032] Figure 5 yes Figure 3 Enlarged schematic diagram of point B in the middle.

[0033] Explanation of the accompanying drawings: 1. bottom template; 2. supporting template; 21. upper template; 22. middle template; 23. lower template; 3. connecting piece; 31. cross bar; 32. vertical bar; 4. semicircular hole; 5. accommodating groove; 6. rotating cylinder; 7. snap-in groove; 8. snap-in block; 9. first block; 10. second block; 11. third block; 12. positioning rod; 13. extension strip; 14. mounting groove; 15. positioning column; 16. first spring; 17. plug-in groove; 18. give way groove; 19. slot; 20. sliding groove; 24. second spring; 25. connecting groove; 26. sliding rod; 27. third spring; 28. fixing plate; 29. ​​second bolt; 30. operating groove; 33. operating rod; 34. first seat; 35. second seat; 36. first bolt; 37. driving rod. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The present application embodiment discloses a formwork structure for post-casting strips of floor slabs. Figure 1 and Figure 2 The template structure includes a bottom template 1, a support template 2 installed on the bottom template 1, and a connector 3. The support templates 2 are symmetrically installed on the bottom template 1, and two opposite support templates 2 are connected together by the connector 3. The support templates 2 are arranged in an array along the length direction of the bottom template 1, and two adjacent support templates 2 are abutted against each other. The bottom template 1 can be supported by a supporting structure such as a steel pipe support frame.

[0036] Reference Figure 2 The supporting formwork 2 includes an upper formwork 21, a middle formwork 22 and a lower formwork 23 which are connected together from top to bottom. A semicircular hole 4 is opened at the lower end of the upper formwork 21, semicircular holes 4 are opened at both the upper and lower ends of the middle formwork 22, and a semicircular hole 4 is opened at the upper end of the lower formwork 23. Two adjacent semicircular holes 4 above and below form a complete circle for steel bars to pass through.

[0037] Reference Figure 2 and Figure 3 A first block 9 is fixed on the upper template 21, a second block 10 is fixed on the middle template 22, and a third block 11 is fixed on the lower template 23. A positioning rod 12 is passed through the first block 9, and the upper end of the positioning rod 12 is a structure with a convex block. The positioning rod 12 is rotated and passed through the first block 9 and the second block 10 in sequence, and the lower end of the positioning rod 12 is threadedly connected to the third block 11, and the upper end of the positioning rod 12 is tightly pressed against the upper surface of the first block 9. Under the action of the positioning rod 12, the upper template 21, the middle template 22 and the lower template 23 are connected together.

[0038] Reference Figure 2 and Figure 4 The connecting member 3 includes a crossbar 31 and a vertical bar 32 installed at both ends of the crossbar 31. The vertical bar 32 is rotatably connected with a rotating cylinder 6 by means of bearings, etc., and the rotating cylinder 6 is threadedly connected to the crossbar 31. A clamping block 8 is also fixed on the side of the vertical bar 32 that is away from each other. The upper template 21, the middle template 22 and the lower template 23 are all provided with a clamping groove 7. Rotating the rotating cylinder 6 can make the clamping block 8 press against the clamping groove 7, so that the two groups of supporting templates 2 relative to each other cannot approach each other under the action of the crossbar 31. A clamping groove 7 is provided between the lower end of the upper template 21 and the upper end of the middle template 22, and between the lower end of the middle template 22 and the upper end of the lower template 23. The clamping block 8 corresponds to the clamping groove 7, and the clamping block 8 is a right triangle. The clamping groove 7 is a structure that matches the clamping block 8. The clamping grooves 7 on the upper template 21 and the middle template 22 are symmetrically arranged with respect to the abutting surface between the upper template 21 and the middle template 22, and one set of right-angled sides of the two clamping blocks 8 are parallel to each other, and the other right-angled side is coplanar with the surface of the vertical rod 32. Furthermore, a fixing plate 28 is fixed to the upper end of the vertical rod 32, and a second bolt 29 is passed through the fixing plate 28, and the second bolt 29 is threadedly connected to the upper end surface of the upper template 21.

[0039] Reference Figure 1 and Figure 2 The cross bar 31 is connected to the adjacent steel bars, a first seat 34 is fixed on the side wall of the cross bar 31, an arc groove is provided on the first seat 34, a second seat 35 is connected to the first seat 34 through a first bolt 36, an arc groove is also provided on the second seat 35, and the first seat 34 and the second seat 35 are clamped on the steel bars under the action of the first bolt 36. Thus, the supporting formwork 2 is connected together under the action of the connecting member 3.

[0040] Reference Figure 3 and Figure 5 An extension bar 13 is fixed on the side wall of the lower template 23, and a mounting groove 14 is provided on the extension bar 13. The mounting groove 14 passes through the upper and lower surfaces of the extension bar 13. A positioning column 15 is slidably installed in the mounting groove 14. The inner wall of the mounting groove 14 is a stepped structure with a small top and a large bottom. The positioning column 15 is also a structure with a small top and a large bottom. That is, the positioning column 15 includes an upper cylinder with a smaller diameter and a lower cylinder with a larger diameter. A spring is sleeved on the side wall of the upper body. One end of the spring is connected to the surface of the lower cylinder, and the other end is connected to the step edge in the mounting groove 14. In the natural state, the upper and lower ends of the positioning column 15 are flush with the surface of the extension bar 13. The lower end of the positioning rod 12 is threadedly connected to the third protrusion and the lower end can extend into the mounting groove 14. A plug-in groove 17 is provided on the bottom template 1. The lower end of the positioning rod 12 can drive the lower end of the positioning column 15 to be plugged into the plug-in groove 17, thereby improving the stability of the supporting template 2. Moreover, under the limiting action of the positioning column 15, the cross bar 31 is not easy to rotate relative to the steel bar.

[0041] Reference Figure 3 and Figure 5 The bottom plate is provided with a receiving groove 5, which is a structure matched with the lower template 23, so that when dismantling, the upper template 21 and the middle template 22 can be taken out more conveniently, and the lower template 23 at the bottom does not need to be taken out, and the lower template 23 is turned over so that the lower template 23 abuts against the receiving groove 5. After the lower template 23 abuts against the receiving groove 5, a complete plane can be formed on the surface of the bottom template 1. The plug-in groove 17 is provided on the bottom surface of the receiving groove 5, and the bottom surface of the receiving groove 5 is also provided with a giving groove 18 for the extension strip 13 to abut against and a groove 19 for the third protrusion to abut against.

[0042] Reference Figure 5 The inner wall of the give way groove 18 is provided with a sliding groove 20, a second spring 24 and a driving rod 37 are installed in the sliding groove 20, one end of the second spring 24 is connected to the end face of the sliding groove 20, and the other end is connected to the end face of the driving rod 37. Under the action of the second spring 24, one end of the driving rod 37 extends into the give way groove 18, and the end of the driving rod 37 is an arc-shaped structure. A connecting groove 25 is also provided between the give way groove 18 and the slot 19 on the bottom template 1, and the connecting groove 25 connects the give way groove 18 and the connecting groove 25 together. A sliding rod 26 is installed in the connecting groove 25, and a third spring 27 is installed between the sliding rod 26 and the inner wall of the connecting groove 25. The connecting groove is also a stepped structure, and a ring convex is provided on the outer wall of the sliding rod 26. The third spring 27 is sleeved on the outer wall of the sliding rod 26, and one end is connected to the step edge, and the other end is connected to the ring convex. In the natural state, one end of the sliding rod 26 is flush with the inner wall of the clearance groove 18, and the other end is flush with the inner wall of the slot 19.

[0043] When the lower template 23 is installed in the receiving groove 5, the extension bar 13 is inserted into the clearance groove 18, driving the second spring 24 to contract, so that the driving rod 37 is pressed into the sliding groove 20. After the lower template 23 is completely inserted into the receiving groove 5, the end of the driving rod 37 corresponds to the positioning column 15, and the other end of the positioning column 15 corresponds to the connecting groove 25, and the elastic force of the second spring 24 can drive the positioning column 15 to slide in the installation groove 14, so that one end of the positioning column 15 abuts against the sliding rod 26, and drives the other end of the sliding rod 26 to be inserted into the third protrusion, so that the lower template 23 is not easy to be separated after being installed in the receiving groove 5.

[0044] Reference Figure 5 Furthermore, in order to facilitate the removal of the lower template 23 for the next use, an operating groove 30 is opened on the bottom template 1, the operating groove 30 is connected to the sliding groove 20, and an operating rod 33 is fixed on the side wall of the driving rod 37. The operating rod 33 extends from the operating groove 30, so that the operating rod 33 can slide the driving rod 37.

[0045] The implementation principle of the formwork structure for the post-casting strip of the floor slab in an embodiment of the present application is as follows: an upper formwork 21, a middle formwork 22 and a lower formwork 23 are connected together to form a post-casting strip formwork. When disassembling the post-casting strip formwork, the upper formwork 21 and the middle formwork 22 are taken out, and the lower formwork 23 is flipped and inserted into the accommodating groove 5. After the post-casting strip is poured, the bottom formwork 1 is disassembled, and then the lower formwork 23 is taken out for subsequent reuse.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A formwork structure for post-casting strips of floor slabs, characterized in that: It comprises a bottom template (1), a supporting template (2) and a connecting piece (3), wherein the supporting template (2) is symmetrically arranged on the surface of the bottom template (1), and the supporting templates (2) are arranged in an array along the length direction of the bottom template (1); the connecting piece (3) is used to connect two symmetrically arranged supporting templates (2) together; The supporting template (2) comprises an upper template (21), a middle template (22) and a lower template (23) which are detachably arranged from top to bottom; a plurality of semicircular holes (4) are provided at the upper end of the lower template (23); a plurality of semicircular holes (4) are provided at the lower end of the upper template (21); semicircular holes (4) are provided at both upper and lower ends of the middle template (22); spaces for steel bars to pass through are formed between adjacent semicircular holes (4); a receiving groove (5) is provided on the bottom template (1); the bottom template (23) can abut against the receiving groove (5); and when the bottom template (23) abuts against the receiving groove (5), the surface of the bottom template (1) forms a complete plane; The connecting member (3) comprises a cross bar (31) and vertical bars (32) connected to both ends of the cross bar (31); the cross bar (31) is connected to a steel bar; a rotating cylinder (6) is rotatably connected to the vertical bar (32); the rotating cylinder (6) is threadedly connected to the cross bar (31); the upper template (21), the middle template (22) and the lower template (23) are all provided with a clamping groove (7); and a clamping block (8) capable of abutting against the clamping groove (7) is provided on the side wall of the vertical bar (32); The side wall of the crossbar (31) is provided with a first seat (34), the first seat (34) is connected to a second seat (35), a first bolt (36) is passed through the second seat (35), the first bolt (36) is threadedly connected to the first seat (34), and the steel bar is clamped between the first seat (34) and the second seat (35); The upper template (21) is provided with a first protrusion, the middle template (22) is provided with a second protrusion, the lower template (23) is provided with a third protrusion, and a positioning rod (12) is passed through the first protrusion, the positioning rod (12) passes through the second protrusion and is threadedly connected to the third protrusion, and the upper end of the positioning rod (12) is tightly pressed against the surface of the first protrusion; An extension strip (13) is provided on the side wall of the lower template (23), and a mounting groove (14) is provided on the extension strip (13). The mounting groove (14) passes through the upper and lower sides of the extension strip (13). A positioning column (15) is provided in the mounting groove (14) to slide up and down. A plug-in groove (17) is provided on the accommodating groove (5). A third protrusion extends from the lower end of the positioning rod (12) and can abut against the upper end of the positioning column (15). The positioning column (15) can be pressed by the positioning rod (12) and plugged into the plug-in groove (17). A first spring (16) is provided in the mounting groove (14). When the positioning rod (12) and the positioning column (15) are out of contact, the positioning column (15) can return to the mounting groove (14). The receiving groove (5) is provided with a clearance groove (18) and an open groove (19). When the lower template (23) is received in the receiving groove (5), the extension strip (13) can be inserted into the clearance groove (18), and the third protrusion can be inserted into the open groove (19). A sliding groove (20) is provided on the inner wall of the clearance groove (18). A driving rod (37) is slidably arranged in the sliding groove (20). A second spring (24) is also arranged in the sliding groove (20). The second spring (24) drives one end of the driving rod (37) to extend into the clearance groove (18). The clearance groove (18) and the open groove (19) are provided with a plurality of springs (24). A connecting groove (25) is also provided between the connecting groove (25), a sliding rod (26) is slidably provided in the connecting groove (25), and a third spring (27) is provided between the side wall of the connecting groove (25) and the sliding rod (26). When the extension bar (13) abuts against the yielding groove (18), the second spring (24) can drive the driving rod (37) to slide, so that one end of the driving rod (37) is inserted into the installation groove (14), and one end of the positioning column (15) is pressed by the driving rod (37) and abuts against the end of the sliding rod (26), so that one end of the driving sliding rod (26) is inserted into the third protrusion.

2. A floor slab post-casting formwork structure according to claim 1, characterized in that: A fixing plate (28) is provided at the upper end of the vertical rod (32), and a second bolt (29) threadedly connected to the surface of the upper template (21) is passed through the fixing plate (28).

3. A floor slab post-casting formwork structure according to claim 1, characterized in that: The clamping block (8) is a right-angled structure, and the clamping groove (7) is a structure that matches the clamping block (8).

4. A floor slab post-casting formwork structure according to claim 1, characterized in that: An operating groove (30) penetrating the sliding groove (20) is provided on the lower surface of the bottom template (1), and an operating rod (33) extending from the operating groove (30) is provided on the driving rod (37).

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