Prefabricated reinforced concrete disassembly-free bottom die structure
By attaching sponge strips to the support template and setting up a steel mesh ribbed beam structure, the problem of concrete leakage in precast reinforced concrete bottom formwork structures without removal was solved, and a concrete sealing effect was achieved during the pouring process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI THE FIRST CONSTR ENG CORP
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-08
AI Technical Summary
In existing precast reinforced concrete structures that do not require removal of the bottom formwork, grout leakage is likely to occur between the bottom slab and the supporting formwork during concrete pouring.
Single-sided adhesive strips made of sponge material are attached to the supporting template. The base plate is placed on the adhesive strip and aligned with its edge to form a receiving groove to accommodate the stacked box. Combined with the steel mesh and rib beam structure, this prevents concrete leakage.
It effectively prevents concrete from leaking between the base slab and the supporting formwork during pouring, ensuring construction quality and environmental protection.
Smart Images
Figure CN224213611U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of floor slab technology, and in particular to a precast reinforced concrete bottom formwork structure that does not require dismantling. Background Technology
[0002] With the rapid development of my country's national economy, the application of various special structures in building construction is becoming increasingly widespread. Concrete composite box girder floor slab technology is a new type of floor structure. The floor slab is composed of a composite box girder and cast-in-place concrete rib beams, forming an integral structure with a continuous box-shaped cross-section. The composite box girder and rib beams share the load. It has advantages such as prefabricated components being manufactured in the factory, stable construction quality, reduced labor intensity on construction sites, and reduced environmental pollution, while also possessing the good overall integrity of cast-in-place structures.
[0003] In existing precast reinforced concrete structures that do not require removal of the bottom formwork, grout leakage is likely to occur between the bottom slab and the supporting formwork during concrete pouring.
[0004] Therefore, it is necessary to provide a precast reinforced concrete structure that does not require the removal of the bottom formwork to solve the above-mentioned technical problems. Utility Model Content
[0005] This utility model provides a precast reinforced concrete bottom formwork structure that does not require dismantling, so that concrete will not leak between the bottom slab and the supporting formwork during pouring.
[0006] The technical solution of this utility model is as follows:
[0007] A precast reinforced concrete structure that requires no removal of the bottom formwork, comprising:
[0008] A support template is placed horizontally, and multiple square-shaped adhesive strips are pasted on the upper surface of the support template. The multiple adhesive strips are arranged in the horizontal and vertical directions, with adjacent adhesive strips spaced apart.
[0009] Multiple top supports are provided below the support template;
[0010] Multiple base plates, each a precast concrete base plate, are respectively mounted on multiple adhesive strips, with the outer edges of the base plates aligned with the outer edges of the adhesive strips. Multiple gaps are formed between the base plates at intervals along both the transverse and longitudinal directions.
[0011] Multiple ribs are respectively and correspondingly arranged at multiple gaps. The multiple ribs extend vertically upward from the gaps. The multiple ribs and the multiple base plates form multiple receiving grooves, which are used to receive the stacked boxes.
[0012] In the precast reinforced concrete formwork structure that does not require dismantling described in this utility model, the adhesive strip is a single-sided adhesive strip made of sponge material.
[0013] In the precast reinforced concrete formwork structure that does not require dismantling as described in this utility model, the width of each edge of the adhesive strip is greater than or equal to 20mm.
[0014] In the precast reinforced concrete formwork structure that does not require removal described in this utility model, the thickness of the adhesive strip is 6mm-10mm.
[0015] In the precast reinforced concrete formwork structure of this utility model, two sets of steel mesh and multiple connecting steel bars are provided inside the rib beam; the two sets of steel mesh are arranged along the width direction of the rib beam and are parallel to each other; the steel mesh includes a first steel bar and a second steel bar connected to each other, the first steel bar extends vertically, the second steel bar extends horizontally and is perpendicular to the width direction of the rib beam; the two ends of the connecting steel bar are respectively connected to the bottom ends of the corresponding two first steel bars;
[0016] The base plate is provided with multiple bottom reinforcing bars, which extend in the transverse and longitudinal directions respectively. Both ends of the bottom reinforcing bars extend to the outside of the base plate and form extensions. The extensions extend to the bottom of the rib beam, and each extension is anchored to the first reinforcing bar at the bottom of the rib beam.
[0017] In the precast reinforced concrete formwork structure that does not require dismantling, the extension extends between the two sets of steel mesh and bends upward.
[0018] In the precast reinforced concrete formwork structure that does not require dismantling as described in this utility model, the length of the horizontal section of the extension is 1 / 4 to 1 / 3 of the width of the rib beam.
[0019] In the precast reinforced concrete formwork structure of this utility model, the vertical section of the extension is 1 / 3 to 1 / 2 the width of the rib beam and protrudes upward from the upper surface of the base plate.
[0020] In the precast reinforced concrete formwork structure that does not require dismantling, the connecting steel bars are spaced apart from the top surface of the supporting formwork, and the extension is located above the connecting steel bars.
[0021] In the precast reinforced concrete formwork structure that does not require dismantling, a coating layer is provided between the upper surface of the base plate and the composite box.
[0022] Compared with the prior art, the advantages of this utility model are as follows: After the precast reinforced concrete bottom formwork structure of this utility model is set up with the support formwork and multiple top supports, the adhesive strip is attached to the upper surface of the support formwork, the bottom plate is placed on the adhesive strip, and the outer edge of the bottom plate is aligned with the outer edge of the adhesive strip. After the stacked box is placed in the receiving groove, it can be poured. During the pouring, the concrete will not leak between the bottom plate and the support formwork. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.
[0024] Figure 1 A schematic diagram of the cross-sectional structure of the precast reinforced concrete bottom formwork-free structure provided in the preferred embodiment of this utility model.
[0025] Figure 2 A three-dimensional structural diagram of the base plate of the precast reinforced concrete formwork structure that does not require dismantling, provided as a preferred embodiment of this utility model.
[0026] Figure 3 A side view of the bottom plate of the precast reinforced concrete formwork structure that does not require dismantling, provided in a preferred embodiment of this utility model.
[0027] Figure 4 A schematic diagram of the adhesive strip structure for a precast reinforced concrete formwork structure that does not require dismantling, provided as a preferred embodiment of this utility model.
[0028] in,
[0029] 10. Stacking boxes
[0030] 11. Support template,
[0031] 12. Adhesive strips,
[0032] 13. Top support,
[0033] 14. Base plate; 141. Bottom reinforcement; 1411. Extension section.
[0034] 15. Rib; 151. Reinforcing mesh; 1511. First reinforcing bar; 1512. Second reinforcing bar; 152. Connecting reinforcing bar.
[0035] 16. Patina layer.
[0036] In the diagram, units with similar structures are represented by the same labels. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0038] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.
[0039] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.
[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0041] In existing precast reinforced concrete structures that do not require removal of the bottom formwork, grout leakage is likely to occur between the bottom slab and the supporting formwork during concrete pouring.
[0042] The following is a preferred embodiment of a precast reinforced concrete bottom formwork-free structure provided by this utility model that can solve the above technical problems.
[0043] This utility model provides a preferred embodiment of a precast reinforced concrete structure that requires no removal of the bottom formwork. Please refer to... Figure 1 The precast reinforced concrete formwork structure includes a support formwork 11, multiple top supports 13, multiple base plates 14, and multiple rib beams 15. The support formwork 11 is placed horizontally, and multiple rectangular adhesive strips 12 are attached to its upper surface. These strips are arranged horizontally and vertically, with adjacent strips spaced apart. Multiple top supports 13 support the support formwork 11 from below. The base plates 14 are precast concrete slabs, each mounted on one of the adhesive strips 12, with the outer edges of the base plates 14 aligned with the outer edges of the adhesive strips 12. Multiple gaps are formed between the base plates 14, spaced horizontally and vertically. Multiple rib beams 15 are correspondingly positioned at these gaps, extending vertically upwards from the gaps. The rib beams 15 and the base plates 14 form multiple receiving slots to accommodate the composite box 10. Figure 1 In the diagram, x represents the horizontal direction and z represents the vertical direction.
[0044] The precast reinforced concrete formwork structure of this utility model allows for the following steps: After the supporting formwork 11 and multiple top supports 13 are erected, adhesive strips 12 are attached to the upper surface of the supporting formwork 11, the base plate 14 is placed on the adhesive strips 12, and the outer edge of the base plate 14 is aligned with the outer edge of the adhesive strips 12. After the stacked box 10 is placed in the receiving groove, pouring can be carried out. During pouring, the concrete will not leak between the base plate 14 and the supporting formwork 11.
[0045] The adhesive strip 12 is a single-sided adhesive strip made of sponge material. The bottom surface of the base plate 14 is not smooth; the sponge material adhesive strip 12 has a certain elasticity and thickness, allowing the base plate 14 to adhere to the adhesive strip 12, preventing concrete from leaking between the base plate 14 and the supporting formwork 11 during pouring. Since the base plate 14 cannot be precisely placed in one go, the single-sided adhesive strip 12 facilitates adjustment of the base plate 14's position.
[0046] Please refer to Figure 4 The width L at each edge of the rubber strip 12 is greater than or equal to 20mm, which can effectively block concrete.
[0047] The thickness of the adhesive strip 12 is 6mm-10mm, preferably 8mm. This allows the base plate 14 to adhere to the adhesive strip 12, and also ensures that the bottom surface of the rib beam 15 and the bottom surface of the base plate 14 are basically on the same plane.
[0048] Please refer to Figure 1 , Figure 2 and Figure 3 The rib beam 15 contains two sets of reinforcing mesh 151 and multiple connecting reinforcing bars 152. The two sets of reinforcing mesh 151 are arranged parallel to each other along the width direction of the rib beam 15. Each reinforcing mesh 151 includes connected first reinforcing bars 1511 and second reinforcing bars 1512. The first reinforcing bars 1511 extend vertically, and the second reinforcing bars 1512 extend horizontally and perpendicular to the width direction of the rib beam 15. The two ends of the connecting reinforcing bars 152 are respectively connected to the bottom ends of the corresponding two first reinforcing bars 1511. The bottom plate 14 contains multiple bottom reinforcing bars 141, which extend horizontally and longitudinally. Both ends of the bottom reinforcing bars 141 extend to the outside of the bottom plate 14, forming extension portions 1411. These extension portions 1411 extend to the bottom of the rib beam 15, and each extension portion 1411 is anchored to the first reinforcing bar 1511 at the bottom of the rib beam 15. After the base plate 14 is placed on the support template 11, the first steel bar 1511 at the bottom and the extension 1411 are anchored to fix the two sets of steel mesh 151 and the connecting steel bar 152, which facilitates the casting to form the rib beam 15.
[0049] Please refer to Figure 1 and Figure 2 The extension 1411 extends between the two sets of steel mesh 151 and bends upward. This ensures a firm connection between the base plate 14 and the rib beam 15, preventing them from separating in the horizontal direction.
[0050] Please refer to Figure 1 and Figure 3 The horizontal segment length d1 of the extension 1411 is 1 / 4 to 1 / 3 of the width d3 of the rib 15. This allows the extension 1411 to extend into the rib 15 without interfering with the extension 1411 on the opposite side.
[0051] Please refer to Figure 1 and Figure 3 The vertical section length d2 of the extension 1411 is 1 / 3 to 1 / 2 of the width of the rib beam 15, and protrudes upwards from the upper surface of the base plate 14. This ensures the strong connection between the base plate 14 and the rib beam 15 without wasting steel reinforcement.
[0052] Please refer to Figure 1 The connecting steel bar 152 is spaced apart from the top surface of the supporting formwork 11, and the extension 1411 is located above the connecting steel bar 152. This prevents the connecting steel bar 152 and the extension 1411 from being exposed on the rib beam 15.
[0053] Please refer to Figure 1 A grout layer 16 is provided between the upper surface of the base plate 14 and the composite box 10. The grout layer 16 can make the composite box 10 and the base plate 14 firmly and reliably connected, and can prevent the steel reinforcement of the base plate 14 from corroding and the concrete from carbonization.
[0054] Construction process of the precast reinforced concrete formwork-free structure according to a preferred embodiment of this utility model:
[0055] Erect the supporting formwork 11 and the top support 13. Mark the positions of the adhesive strips 12 corresponding to the bottom plate 14 on the supporting formwork 11. Apply the adhesive strips 12. Place the bottom plate 14 on the adhesive strips 12 and align the outer edge of the bottom plate 14 with the outer edge of the adhesive strips 12. Tie the steel mesh 151. Anchor the first steel bar 1511 at the bottom to the extension 1411. Place the composite box 10 and pour concrete to form the rib beam 15. After the concrete has cured, remove the supporting formwork 11 and the top support 13.
[0056] This completes the construction process of the precast reinforced concrete formwork structure that does not require removal, as described in this preferred embodiment.
[0057] This utility model relates to a precast reinforced concrete formwork structure that does not require dismantling. After the supporting formwork and multiple top supports are erected, adhesive strips are attached to the upper surface of the supporting formwork. The bottom plate is placed on the adhesive strips, and the outer edge of the bottom plate is aligned with the outer edge of the adhesive strips. After the stacked box is placed in the receiving groove, pouring can be carried out. During pouring, the concrete will not leak between the bottom plate and the supporting formwork.
[0058] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the concept of the technical solution of the present invention, should be included within the scope of protection of the present invention.
Claims
1. A precast reinforced concrete structure that requires no removal of the bottom formwork, characterized in that, include: A support template is placed horizontally, and multiple square-shaped adhesive strips are pasted on the upper surface of the support template. The multiple adhesive strips are arranged in the horizontal and vertical directions, with adjacent adhesive strips spaced apart. Multiple top supports are provided below the support template; Multiple base plates, each a precast concrete base plate, are respectively mounted on multiple adhesive strips, with the outer edges of the base plates aligned with the outer edges of the adhesive strips. Multiple gaps are formed between the base plates at intervals along both the transverse and longitudinal directions. Multiple ribs are respectively and correspondingly arranged at multiple gaps. The multiple ribs extend vertically upward from the gaps. The multiple ribs and the multiple base plates form multiple receiving grooves, which are used to receive the stacked boxes.
2. The precast reinforced concrete formwork structure that does not require removal according to claim 1, characterized in that, The adhesive strip is a single-sided adhesive strip made of sponge material.
3. The precast reinforced concrete formwork structure that does not require removal according to claim 2, characterized in that, The width of each edge of the adhesive strip is greater than or equal to 20mm.
4. The precast reinforced concrete formwork structure that does not require removal according to claim 3, characterized in that, The thickness of the adhesive strip is 6mm-10mm.
5. The precast reinforced concrete formwork structure that does not require removal according to claim 1, characterized in that, The rib beam is provided with two sets of steel mesh and multiple connecting steel bars; the two sets of steel mesh are arranged along the width direction of the rib beam and are parallel to each other; the steel mesh includes a first steel bar and a second steel bar connected to each other, the first steel bar extends vertically, the second steel bar extends horizontally and is perpendicular to the width direction of the rib beam; the two ends of the connecting steel bars are respectively connected to the bottom ends of the corresponding two first steel bars. The base plate is provided with multiple bottom reinforcing bars, which extend in the transverse and longitudinal directions respectively. Both ends of the bottom reinforcing bars extend to the outside of the base plate and form extensions. The extensions extend to the bottom of the rib beam, and each extension is anchored to the first reinforcing bar at the bottom of the rib beam.
6. The precast reinforced concrete formwork structure that does not require removal according to claim 5, characterized in that, The extension extends between the two sets of steel mesh and bends upward.
7. The precast reinforced concrete formwork structure that does not require removal according to claim 6, characterized in that, The length of the horizontal section of the extension is 1 / 4 to 1 / 3 of the width of the rib.
8. The precast reinforced concrete formwork structure that does not require removal according to claim 7, characterized in that, The vertical section of the extension is 1 / 3 to 1 / 2 the width of the rib beam and protrudes upward from the upper surface of the base plate.
9. The precast reinforced concrete formwork structure that does not require removal according to claim 5, characterized in that, The connecting steel bars are spaced apart from the top surface of the supporting template, and the extension is located above the connecting steel bars.
10. The precast reinforced concrete formwork structure that does not require removal according to claim 1, characterized in that, A patina layer is provided between the upper surface of the base plate and the stacking box.