A self-supporting and disassembly-free post-pouring strip template

Abstract

The application relates to a non-supporting and disassembly-free post-poured strip template, and relates to the technical field of building engineering construction, which comprises a wave web, the wave web is a web with a wave shape on the surface and formed by cold bending processing of a thin steel plate, and the two ends of the wave web are fixed in cast-in-place floor slabs on the two sides of a post-poured strip; an upper steel beam and a lower steel beam, the upper steel beam and the lower steel beam are arranged above and below the post-poured strip respectively. The application uses the floor slab itself as a template structure stress support point by arranging the wave web in the cast-in-place floor slabs, realizes non-supporting of the lower part of the template structure through the design of the two side support points, is stable and efficient in the construction process, has a large construction site space, does not affect subsequent construction procedures, the wave web bottom die is disassembly-free and can realize clean environmental protection, and the comprehensive cost is low, so the application value is high.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and in particular to a supportless, non-removable post-pouring strip formwork. Background Technology

[0002] Post-cast strip formwork refers to a formwork system designed in cast-in-place reinforced concrete structures to reserve a concrete strip (post-cast strip) for later pouring at a certain time. This formwork needs to temporarily close the reserved area during the main structure construction. After the stress from structural settlement and shrinkage is released, concrete is poured to connect it into a whole. Post-cast strip formwork is an indispensable temporary structural component in the construction process.

[0003] In related technologies, reference can be made to Chinese utility model patent CN206571154U, which discloses a template for a post-cast strip in a base slab, comprising a bottom template and two side templates. The side templates include a plate body, with several mating grooves along its length on the lower edge. Each mating groove contains a flexible plug. The flexible plug includes a first elastic part and a second elastic part. The free ends of the first and second elastic parts are respectively provided with semi-circular grooves. The first and second elastic parts can rotate around their connection points with the mating grooves towards the bottom of the grooves, filling the space within the grooves and allowing the two grooves to cooperate to form main reinforcement holes. The upper edge of the side template is provided with main reinforcement holes for accommodating upper main reinforcement bars.

[0004] However, the above-mentioned post-pouring strip formwork requires the use of an independent support structure to support and fix the post-pouring strip formwork during installation. This not only results in relatively high cost and complicated construction, but also occupies a lot of construction space, making it unsuitable for projects with limited construction space and tight construction schedules. Utility Model Content

[0005] In order to improve the construction efficiency of post-pouring strip formwork, this application provides a supportless and non-removable post-pouring strip formwork.

[0006] This application provides a supportless, non-removable post-pouring strip formwork, which adopts the following technical solution:

[0007] A supportless, non-removable formwork for post-pouring strips includes:

[0008] The corrugated web is a web with a corrugated surface formed by cold bending of a thin steel plate. The two ends of the corrugated web are fixed in the cast-in-place floor slab on both sides of the post-pouring strip.

[0009] The upper steel beam and the lower steel beam are respectively positioned above and below the post-pouring strip. The two ends of the upper steel beam and the lower steel beam abut against the upper and lower surfaces of the cast-in-place floor slabs on both sides of the post-pouring strip, respectively. Both ends of the upper steel beam and the lower steel beam are provided with a connecting mechanism, which connects the ends of the upper steel beam and the lower steel beam to each other.

[0010] By adopting the above technical solution, corrugated plates are placed at the bottom of the post-cast strip as the bottom formwork for pouring concrete. The excellent in-plane and out-of-plane deformation properties of the corrugated plates effectively adapt to the relative deformation of the structures on both sides of the post-cast strip, thus fulfilling the function of pouring concrete without affecting the inherent function of the post-cast strip. Simultaneously, the corrugated plates at the junction of the old and new concrete also act as water-stop steel plates. By placing the corrugated plates within the cast-in-place floor slab and using the slab itself as the load-bearing support point of the formwork structure, the design of the support points on both sides achieves unsupported lower parts of the formwork structure. This results in a stable and efficient construction process, ample construction space, no impact on subsequent construction procedures, and the elimination of the corrugated plate bottom formwork, achieving cleanliness and environmental friendliness. The overall cost is low, thus demonstrating high application value. Furthermore, by setting upper and lower steel beams through connecting mechanisms above and below the post-cast strip, the continuity of the floor slab structure is ensured during the pouring of the post-cast strip concrete, guaranteeing the safety of the floor slab in the unsupported state.

[0011] Optionally, the connecting mechanism includes:

[0012] An embedded steel pipe is installed inside a cast-in-place floor slab, with its top and bottom ends penetrating outside the slab.

[0013] A through-bolt is provided, which vertically and downwardly passes through the upper steel beam, the pre-embedded steel pipe, and the lower steel beam in sequence.

[0014] Two connecting nuts are threaded onto the through-bolt and located at both ends of the through-bolt.

[0015] By adopting the above technical solution, pre-embedded steel pipes are installed within the cast-in-place floor slab. Through-bolts are then passed through the upper steel beam, the pre-embedded steel pipes, and the lower steel beam. Two connecting nuts are then tightened onto the upper and lower steel beams respectively, thus completing the fixing of the upper and lower steel beams to the floor slab. This method is convenient, simple, and highly efficient. Furthermore, by adjusting the tightness between the two connecting nuts and the through-bolts, flexible and rigid formwork structures can be achieved respectively. The flexible formwork structure is suitable for adjusting the deformation of the post-cast strip before concrete pouring; the rigid formwork structure ensures the continuity of the floor slab structure during the pouring of the post-cast strip concrete, ensuring the safety of the floor slab in an unsupported state.

[0016] Optionally, both ends of the lower steel beam are provided with recessed template grooves.

[0017] By adopting the above technical solution, recessed template slots are opened at both ends of the lower steel beam, which facilitates the connection between different templates in the vicinity and improves the convenience of construction.

[0018] Optionally, fixing pads are provided above and below the ends of the upper and lower steel beams, and fixing holes are provided on the fixing pads for the through bolts to pass through.

[0019] By adopting the above technical solution, fixing plates are set above and below the ends of the upper and lower steel beams, so that the upper and lower steel beams can be fixed by passing the through bolts through the fixing plates without drilling holes in the upper and lower steel beams, which greatly improves the convenience of construction. In addition, the fixing plates also protect the contact surfaces between the upper and lower steel beams and the cast-in-place floor slab.

[0020] Optionally, the corrugated plate is provided with a cleaning hole, the corrugated plate is provided with a fixing component, and a plug is detachably provided on the corrugated plate through the fixing component, the plug blocking the cleaning hole.

[0021] By adopting the above technical solution, a debris removal hole is opened on the corrugated plate. The surface of the corrugated plate can be cleaned before concrete pouring, and small ash, wood chips and other debris on the corrugated plate can be discharged. This reduces the probability of concrete inclusion during subsequent concrete pouring and ensures the concrete pouring effect.

[0022] Optionally, the fixing component includes:

[0023] A fixing tube is provided on the inner wall of the impurity removal hole of the corrugated plate, and the inner wall of the fixing tube is threaded.

[0024] A fixing ring is provided on the plug, and the outer wall of the fixing ring is provided with a thread for threaded connection with the inner wall of the fixing tube.

[0025] By adopting the above technical solution, a fixed pipe is installed inside the impurity removal hole, and a fixed ring is installed on the plug. Then, by rotating the plug to make the fixed ring and the fixed pipe threaded together, the plug can be used to block the impurity removal hole. This method is convenient, simple, and easy to use.

[0026] Optionally, the top of the impurity removal hole on the corrugated plate is provided with an arc-shaped guide surface, the fixing tube is located below the guide surface, and the height of the end of the guide surface away from the center of the impurity removal hole is higher than the height of the end near the center of the impurity removal hole.

[0027] By adopting the above technical solution, an arc-shaped guide surface is opened at the top of the debris removal hole. The guide surface can guide small ash, wood chips and other debris on the corrugated plate, making it easier for the debris to be discharged from the debris removal hole.

[0028] Optionally, threaded protective sleeves are fitted at both the top and bottom of the through screw.

[0029] By adopting the above technical solution, threaded protective sleeves are fitted on both the top and bottom of the through bolt, thereby protecting the threads on the through bolt during the concrete pouring stage. This facilitates the smooth unscrewing of the two connecting nuts from the through bolt during subsequent removal, ensuring the efficiency of the removal work.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By using corrugated plates placed at the bottom of the post-cast strip as the bottom formwork for pouring concrete, the excellent in-plane and out-of-plane deformation properties of the corrugated plates can better adapt to the relative deformation of the structures on both sides of the post-cast strip. This can not only complete the function of pouring concrete but also not affect the inherent function of the post-cast strip. At the same time, the corrugated plates at the new and old concrete sections can also act as water-stop steel plates.

[0032] 2. By adjusting the tightness between the two connecting nuts and the through bolts, flexible formwork structures and rigid formwork structures can be achieved respectively. The flexible formwork structure is suitable for the adjustment and deformation requirements of the post-pouring strip before pouring concrete, while the rigid formwork structure can ensure the continuity of the floor slab structure during the pouring of post-pouring strip concrete and ensure the safety of the floor slab in an unsupported state.

[0033] 3. By installing threaded protective sleeves at both the top and bottom of the through bolt, the threads on the through bolt are protected during the concrete pouring stage, making it easier to unscrew the two connecting nuts from the through bolt later, thus ensuring the efficiency of the dismantling work. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of this application;

[0035] Figure 2 This is a schematic diagram of the connecting mechanism in this application;

[0036] Figure 3 This is a structural schematic diagram of the fixing component in this application.

[0037] Reference numerals: 11. Corrugated web; 12. Upper steel beam; 13. Lower steel beam; 14. Threaded protective sleeve; 2. Connecting mechanism; 21. Embedded steel pipe; 22. Through bolt; 23. Connecting nut; 24. Fixing pad; 25. Template groove; 26. Impurity removal hole; 27. Guide surface; 28. Plug; 3. Fixing component; 31. Fixing pipe; 32. Fixing ring. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0039] This application discloses a supportless, non-removable post-pouring strip template.

[0040] Reference Figure 1 The unsupported, non-removable formwork for the post-cast strip includes a corrugated web 11, an upper steel beam 12, and a lower steel beam 13. The corrugated web 11 is a web with a corrugated surface formed by cold bending of a thin steel plate. Both ends of the corrugated web 11 are fixed in the cast-in-place floor slab on both sides of the post-cast strip.

[0041] Reference Figure 1 A corrugated plate 11 is placed at the bottom of the post-cast strip as the bottom formwork for pouring concrete. The excellent in-plane and out-of-plane deformation properties of the corrugated plate 11 effectively accommodate the relative deformation of the structures on both sides of the post-cast strip. This achieves the purpose of pouring concrete without affecting the inherent function of the post-cast strip. Simultaneously, the corrugated plate 11 at the junction of the old and new concrete also functions as a water-stop steel plate. By placing the corrugated plate 11 within the cast-in-place floor slab, using the slab itself as the load-bearing support point of the formwork structure, and through the design of the support points on both sides, the lower part of the formwork structure is unsupported. This results in a stable and efficient construction process, ample construction space, no impact on subsequent construction procedures, and the elimination of the need to remove the corrugated plate 11 bottom formwork, achieving cleanliness and environmental friendliness. With low overall cost, its application value is very high.

[0042] Reference Figure 1 The upper steel beam 12 and the lower steel beam 13 are respectively set above and below the post-pouring strip. The two ends of the upper steel beam 12 and the lower steel beam 13 abut against the upper and lower surfaces of the cast-in-place floor slabs on both sides of the post-pouring strip. Both ends of the upper steel beam 12 and the lower steel beam 13 are provided with a connecting mechanism 2, which connects the ends of the upper steel beam 12 and the lower steel beam 13 to each other.

[0043] Reference Figure 1 and Figure 2 The connecting mechanism 2 includes a pre-embedded steel pipe 21, a through-bolt 22, and two connecting nuts 23. The pre-embedded steel pipe 21 is embedded in the cast-in-place floor slab, with its top and bottom ends protruding above and below the slab, respectively. Fixing pads 24 are laid above and below the ends of the upper steel beam 12 and the lower steel beam 13, with vertically penetrating fixing holes in the fixing pads 24. The through-bolt 22 passes vertically downwards through the fixing holes in the fixing pads 24 on the upper steel beam 12, the pre-embedded steel pipe 21, and the fixing holes in the fixing pads 24 on the lower steel beam 13. The two connecting nuts 23 are threaded onto the through-bolt 22 and are located at both ends of the through-bolt 22.

[0044] Reference Figure 2By tightening the two connecting nuts 23 onto the upper steel beam 12 and lower steel beam 13 respectively, the upper steel beam 12 and lower steel beam 13 can be fixed to the floor slab. This is convenient, simple, and efficient. By adjusting the tightness between the two connecting nuts 23 and the through bolts 22, flexible and rigid formwork structures can be achieved respectively. The flexible formwork structure is suitable for adjusting the deformation of the post-cast strip before concrete pouring; the rigid formwork structure can ensure the continuity of the floor slab structure during the pouring of post-cast strip concrete, ensuring the safety of the floor slab in an unsupported state.

[0045] Reference Figure 2 Both ends of the lower steel beam 13 are provided with recessed template grooves 25. This facilitates the connection between different templates in the vicinity and improves construction convenience.

[0046] Reference Figure 2 The threaded protective sleeves 14 are fitted on both the top and bottom of the through screw 22. This protects the threads on the through screw 22 during the concrete pouring stage, making it easier to unscrew the two connecting nuts 23 from the through screw 22 when it is removed, thus ensuring the efficiency of the removal work.

[0047] Reference Figure 3 The corrugated plate 11 has cleaning holes 26 on its surface. The top of each cleaning hole 26 has an arc-shaped guide surface 27. The end of the guide surface 27 furthest from the center of the cleaning hole 26 is higher than the end closest to the center. The cleaning holes 26 allow the surface of the corrugated plate 11 to be cleaned before concrete pouring, removing small pieces of ash, wood chips, and other debris. This reduces the probability of slag inclusions in the concrete during subsequent pouring, ensuring a better concrete pouring result.

[0048] Reference Figure 1 and Figure 3 A fixing component 3 is provided on the corrugated plate 11, and a plug 28 is detachably mounted on the corrugated plate 11 via the fixing component 3. The plug 28 blocks the impurity removal hole 26. The fixing component 3 includes a fixing tube 31 and a fixing ring 32. The fixing tube 31 is fixedly installed on the inner wall of the impurity removal hole 26 of the corrugated plate 11, and the inner wall of the fixing tube 31 is threaded. The fixing ring 32 is fixedly installed on the outer wall of the bottom end of the plug 28, and the outer wall of the fixing ring 32 is threaded to connect with the inner wall of the fixing tube 31. By rotating the plug 28 to make the fixing ring 32 threadedly connected to the fixing tube 31, the plug 28 can block the impurity removal hole 26, which is convenient, simple, and easy to use.

[0049] The working principle of this application embodiment is as follows:

[0050] The corrugated plate 11 is placed at the bottom of the post-cast strip as the bottom formwork for pouring concrete. The excellent deformation performance of the corrugated plate 11 in both the in-plane and out-of-plane planes can better adapt to the relative deformation of the structures on both sides of the post-cast strip. It can not only complete the function of pouring concrete, but also not affect the inherent function of the post-cast strip. At the same time, the corrugated plate 11 at the new and old concrete can also act as a water-stop steel plate.

[0051] By placing the corrugated plate 11 inside the cast-in-place floor slab and using the floor slab itself as the stress support point of the formwork structure, the design of the support points on both sides achieves the absence of support at the bottom of the formwork structure, resulting in a stable and efficient construction process, a large construction site space, and no impact on subsequent construction procedures. The corrugated plate 11 bottom formwork does not need to be removed, which also achieves cleanliness and environmental protection, and the overall cost is low, so it has high application value.

[0052] 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 supportless, non-removable formwork for post-pouring strips, characterized in that: include: Corrugated web (11), the corrugated web (11) is a web with a corrugated shape formed by cold bending of thin steel plate, and the two ends of the corrugated web (11) are fixed in the cast-in-place floor slab on both sides of the post-pouring strip; The upper steel beam (12) and the lower steel beam (13) are respectively located above and below the post-pouring strip. The two ends of the upper steel beam (12) and the lower steel beam (13) respectively abut against the upper and lower surfaces of the cast-in-place floor slabs on both sides of the post-pouring strip. Both ends of the upper steel beam (12) and the lower steel beam (13) are provided with a connecting mechanism (2), which connects the ends of the upper steel beam (12) and the lower steel beam (13) to each other.

2. The unsupported, non-removable post-pouring strip formwork according to claim 1, characterized in that: The connecting mechanism (2) includes: An embedded steel pipe (21) is installed inside the cast-in-place floor slab, with the top and bottom ends of the embedded steel pipe (21) passing through the cast-in-place floor slab respectively. Through-screw (22), which vertically downward passes through the upper steel beam (12), the pre-embedded steel pipe (21) and the lower steel beam (13) in sequence; Two connecting nuts (23) are threaded onto the through screw (22) and located at both ends of the through screw (22).

3. The unsupported, non-removable post-pouring strip formwork according to claim 1, characterized in that: Both ends of the lower steel beam (13) are provided with recessed template grooves (25).

4. The unsupported, non-removable post-pouring strip formwork according to claim 2, characterized in that: Fixing pads (24) are provided above and below the ends of the upper steel beam (12) and the lower steel beam (13), and fixing holes are provided on the fixing pads (24) for the through screws (22) to pass through.

5. The unsupported, non-removable post-pouring strip formwork according to claim 1, characterized in that: The corrugated plate (11) is provided with a cleaning hole (26), and a fixing component (3) is provided on the corrugated plate (11). A plug (28) is detachably provided on the corrugated plate (11) through the fixing component (3), and the plug (28) blocks the cleaning hole (26).

6. The unsupported, non-removable post-pouring strip formwork according to claim 5, characterized in that: The fixing component (3) includes: A fixing tube (31) is provided on the inner wall of the impurity removal hole (26) of the corrugated plate (11), and the inner wall of the fixing tube (31) is threaded. A fixing ring (32) is provided on the plug (28), and the outer wall of the fixing ring (32) is provided with a thread for threaded connection with the inner wall of the fixing tube (31).

7. The unsupported, non-removable post-pouring strip formwork according to claim 6, characterized in that: The top of the impurity removal hole (26) on the corrugated plate (11) is provided with an arc-shaped guide surface (27). The fixed tube (31) is located below the guide surface (27). The height of the end of the guide surface (27) away from the center of the impurity removal hole (26) is higher than the height of the end near the center of the impurity removal hole (26).

8. The unsupported, non-removable post-pouring strip formwork according to claim 2, characterized in that: The top and bottom of the through screw (22) are fitted with threaded protective sleeves (14).

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