Pouring supporting bottom die and pouring structure for laminated slab joint post-pouring belt

Abstract

The utility model discloses a laminated slab joint post-cast strip pouring supporting bottom die and a pouring structure. The technical problems that in the prior art, a wood formwork needs to be cleaned with leaked slurry, and cracks are likely to be generated are solved. The laminated slab joint post-cast strip pouring supporting bottom die comprises a wood formwork matched with the joint post-cast strip in width and further comprises a flow guide plate, the flow guide plate is arranged in the trend of the joint post-cast strip, and flow guide seams are formed between the side edges of the flow guide plate and the side faces, on the two sides of the joint post-cast strip, of laminated slabs; the transition net is positioned below the flow guide plate; the sealing layer is positioned between the bottom surface of the laminated slab and the top surface of the wood template on the two sides of the joint post-cast strip; the bottom of the joint post-cast strip is filled with the filling plate, and the filling plate is located between the wood formwork and the transition net; the flow guide holes are formed in the filling plate and the wood formwork, and the flow guide holes are located in the two sides of the joint post-cast strip and arranged at intervals in the trend of the joint post-cast strip.

Description

Technical Field

[0001] This utility model relates to the technical field of post-cast strip construction at the joints of composite slabs, and more specifically, to the supporting bottom formwork and construction structure for post-cast strip construction at the joints of composite slabs. Background Technology

[0002] Prefabricated buildings offer significant energy savings and emission reductions compared to traditional buildings, making them a crucial pathway for the construction industry to achieve its "dual carbon" goals. Currently, prefabricated building floor slabs typically employ a structure of "precast composite slabs + cast-in-place layers + post-cast joint strips." In existing composite slab construction, on the one hand, to prevent grout leakage at the joints, additional sponge strips are often used for sealing. However, due to the limited weight of the composite slabs and the fact that the bottom surface of the slabs and the wooden formwork are not perfectly flat and adhered, gaps remain, leading to frequent concrete grout leakage. Subsequent construction requires substantial manpower for cleaning the grout leaking from the wooden formwork. On the other hand, the joints create two closely spaced construction joints. Due to the inherent properties of concrete, these joints are highly susceptible to future cracking, affecting not only aesthetics but also causing psychological distress for homeowners. Utility Model Content

[0003] The main purpose of this utility model is to provide a bottom formwork and casting structure for the post-cast strip of composite slab joints, so as to solve the technical problems of leakage cleaning and easy cracking of wooden formwork in the prior art.

[0004] To achieve the above objectives, this utility model first provides a bottom formwork for casting support of the post-cast strip at the joint of the composite slab, the technical solution of which is as follows:

[0005] The bottom formwork for supporting the pouring of the post-pouring strip at the joint of the composite slab includes a wooden template adapted to the width of the post-pouring strip, and further includes: a guide plate, which is arranged along the direction of the post-pouring strip, and the side of the guide plate forms a guide gap with the side of the composite slab on both sides of the post-pouring strip; a transition mesh, which is located below the guide plate; a sealing layer, which is located between the bottom surface of the composite slab on both sides of the post-pouring strip and the top surface of the wooden template; a filler plate, which fills the bottom of the post-pouring strip and is located between the wooden template and the transition mesh; and guide holes, which are formed on the filler plate and the wooden template, and are located on both sides of the post-pouring strip and are arranged at intervals along the direction of the post-pouring strip.

[0006] In the aforementioned casting support formwork of this utility model, firstly, in addition to sealing the easily leaking parts of the concrete slurry, a combination of guide plates and guide holes is used to guide the concrete slurry out before it flows to the easily leaking parts, thereby effectively avoiding contamination of the wooden formwork and significantly improving subsequent construction efficiency. Secondly, a transition mesh is added to strengthen the concrete strength, thereby enhancing its crack resistance. In particular, the bottom of the post-cast strip at the joint is limited by the filler plate, which forms a groove after the support formwork is removed. This groove can be used to apply anti-crack putty and reinforcing mesh later, further improving crack resistance.

[0007] As a further improvement to the aforementioned composite slab joint post-cast strip casting support formwork: the guide plate comprises aluminum composite panels connected end-to-end along the direction of the joint post-cast strip. This results in low cost, lightweight, and ease of use.

[0008] As a further improvement to the above-mentioned casting support formwork for the post-cast strip of the composite slab joint, the feature is that: adjacent aluminum composite panels are bonded together; the sides of the aluminum composite panels are provided with slopes. Thus, by providing slopes, it is helpful for the directional discharge of concrete slurry; preferably, the aluminum composite panels are arranged in an inverted T-shape, and the angle between the slope and the horizontal plane is 25-35°.

[0009] As a further improvement to the aforementioned casting support formwork for the post-cast strip at the joint of the composite slab, the transition mesh is made of metal fiber felt. Metal fiber felt has a rough surface and abundant pores, resulting in high strength and effective bonding with concrete and crack-resistant putty, thus significantly improving crack resistance.

[0010] As a further improvement to the bottom formwork for the post-cast strip of the composite slab joint, the sealing layer is a PE sponge strip. This is readily available, low in cost, and provides a good sealing effect.

[0011] As a further improvement to the aforementioned casting support formwork for the post-cast strip at the joint of the composite slab: the diameter of the guide holes is 4–8 mm, and the spacing between them along the direction of the post-cast strip is 400–600 mm. Therefore, the number of guide holes is appropriate, easy to process, and the guiding effect is good.

[0012] To achieve the above objectives, this utility model further provides a post-cast strip structure for composite slab joints, the technical solution of which is as follows:

[0013] The composite slab joint post-cast strip construction structure includes cast-in-place concrete and further includes: a guide plate, which is arranged along the direction of the joint post-cast strip, and a guide joint is formed between the side of the guide plate and the side of the composite slab on both sides of the joint post-cast strip; a transition mesh, which is located below the guide plate; a first putty layer, which is applied to the bottom surface of the transition mesh; a reinforcing mesh, which is laid on the bottom surface of the first putty layer; the width of the reinforcing mesh is greater than the width of the joint post-cast strip; and a second putty layer, which is applied to the bottom surface of the reinforcing mesh.

[0014] In the above-mentioned casting structure of this utility model, the strength of the post-cast strip at the joint is significantly improved through the interaction and cooperation of the transition mesh, reinforcing mesh and putty layer, and the crack prevention effect is good.

[0015] As a further improvement to the above-mentioned post-cast strip structure for composite slab joints, the reinforcing mesh is made of fiberglass mesh. This makes it readily available, low-cost, and provides good crack resistance.

[0016] As a further improvement to the above-mentioned composite slab joint post-cast strip construction structure, the reinforcing mesh extends 100-200mm beyond the joint post-cast strip at both ends. This effectively strengthens the connection between the joint post-cast strip and the composite slab, significantly improving crack resistance.

[0017] It is evident that the composite slab joint post-pouring strip casting support bottom formwork and casting structure of this utility model are simple in structure, easy to construct, and low in cost. They can significantly save time in cleaning wooden formwork, and the construction joint is less prone to cracking in the later stages. In particular, when the support bottom formwork and the casting structure are used together, they can achieve the best construction efficiency and construction quality, effectively solving the technical problems of grout leakage and easy cracking of wooden formwork in the prior art, and have strong practicality.

[0018] The embodiments of the invention provided in this specification will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the embodiments of the invention provided in this specification will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the embodiments of the invention provided in this specification. Attached Figure Description

[0019] The accompanying drawings, which form part of the embodiments of the invention provided in this specification, are used to aid in understanding the embodiments of the invention provided in this specification. The content provided in the drawings and the related descriptions in the embodiments of the invention provided in this specification can be used to explain the embodiments of the invention provided in this specification, but do not constitute an undue limitation on the embodiments of the invention provided in this specification. In the drawings:

[0020] Figure 1This is a schematic diagram of the structure of the bottom formwork for casting the post-cast strip of the composite plate joint in Embodiment 1 of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the bottom formwork for casting the post-cast strip of the composite plate joint in Embodiment 2 of this utility model.

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0023] The relevant markings in the above figures are:

[0024] 110- Composite slab, 120- Joint post-pouring strip, 130- Wooden formwork, 140- Cast-in-place concrete, 200- Guide plate, 300- Transition mesh, 400- Sealing layer, 500- Filler plate, 600- Guide hole, 700- First putty layer, 800- Reinforcing mesh, 900- Second putty layer. Detailed Implementation

[0025] The embodiments of the invention provided in this specification will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the embodiments of the invention provided in this specification based on these descriptions. Before describing the embodiments of the invention provided in this specification in conjunction with the accompanying drawings, it should be particularly noted that:

[0026] The technical solutions and features provided in the embodiments of the invention provided in this specification, including the following description, can be combined with each other without conflict.

[0027] Furthermore, the embodiments of the inventions provided in this specification mentioned below are generally only a portion of the embodiments of the inventions provided in this specification, and not all of them. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the inventions provided in this specification without creative effort should fall within the scope of protection of the embodiments of the inventions provided in this specification.

[0028] Regarding the terminology and units in the embodiments of the invention provided in this specification: The terms "comprising," "including," "having," and any variations thereof in the description, claims, and related parts of the embodiments of the invention provided in this specification are intended to cover non-exclusive inclusion. Furthermore, other relevant terms and units in the embodiments of the invention provided in this specification can be reasonably interpreted based on the relevant content of the embodiments of the invention provided in this specification.

[0029] Example 1

[0030] Figure 1 This is a schematic diagram of the supporting bottom formwork for the post-cast strip of the composite slab joint in this embodiment.

[0031] like Figure 1 The bottom formwork for the casting support of the post-cast strip at the joint of the composite slab shown includes a wooden formwork 130 adapted to the width of the post-cast strip 120, a guide plate 200, a transition net 300, a sealing layer 400, a filling plate 500, and a guide hole 600.

[0032] The guide plate 200 is arranged along the direction of the post-cast strip 120 of the joint, and a guide joint is formed between the side of the guide plate 200 and the side of the composite plate 110 on both sides of the post-cast strip 120 of the joint; the guide plate 200 includes aluminum composite panels connected end to end along the direction of the post-cast strip 120 of the joint, adjacent aluminum composite panels are bonded together, the side of the aluminum composite panel is provided with a slope, the aluminum composite panel is arranged in an inverted T shape, and the angle between the slope and the horizontal plane is 30°.

[0033] The transition mesh 300 is located below the guide plate 200; the transition mesh 300 is a metal fiber felt.

[0034] The sealing layer 400 is located between the bottom surface of the composite plate 110 and the top surface of the wooden template 130 on both sides of the post-cast strip 120 of the joint; the sealing layer 400 is a PE sponge strip.

[0035] The filling plate 500 fills the bottom of the post-cast strip 120 of the joint and is located between the wooden formwork 130 and the transition mesh 300;

[0036] The guide holes 600 are formed on the filler plate 500 and the wooden template 130. The guide holes 600 are located on both sides of the joint post-pouring strip 120 and are arranged at intervals along the direction of the joint post-pouring strip 120. The diameter of the guide holes 600 is 6mm and the arrangement interval along the direction of the joint post-pouring strip 120 is 500mm.

[0037] The construction process for the supporting formwork of the post-cast strip at the joint of the composite slab in this embodiment is as follows: After the formwork frame is erected, wooden formwork 130 is laid, and then the opening position is located by cross points and the installation position of the sealing layer 400 is located by chalk lines; the sealing layer 400 is glued and fixed; the filling board 500 is laid, and the filling board 500 can be plywood; holes 600 are drilled using a Φ6 drill bit to form guide holes; the transition net 300 and the guide plate 200 are laid in sequence to complete the construction, and then concrete is poured.

[0038] Example 2

[0039] Figure 2 This is a schematic diagram of the supporting bottom formwork for the post-cast strip of the composite slab joint in this embodiment. Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0040] like Figure 2-3 The composite slab joint post-cast strip structure shown includes cast-in-place concrete 140, a guide plate 200, a transition mesh 300, a first putty layer 700, a reinforcing mesh 800, and a second putty layer 900, wherein the guide plate 200 and the transition mesh 300 are the same as in Example 1.

[0041] The first putty layer 700 is applied to the bottom surface of the transition mesh 300;

[0042] The reinforcing mesh 800 is laid on the bottom surface of the first putty layer 700; the reinforcing mesh 800 is a fiberglass mesh; the width of the reinforcing mesh 800 is greater than the width of the post-cast strip 120 at the joint; the width of the reinforcing mesh 800 extending beyond the post-cast strip 120 at both ends is 100mm.

[0043] The second putty layer 900 is applied to the bottom surface of the reinforcing mesh 800.

[0044] The construction process of the post-cast strip structure of the composite slab joint in this embodiment is as follows: When the concrete in Example 1 reaches the demolding strength, the formwork support, wooden formwork 130, sealing layer 400 and filling board 500 are removed; then, anti-crack putty is applied to the groove formed by the filling board 500 to form the first putty layer 700; before the first putty layer 700 hardens, the reinforcing mesh 800 is laid, and then anti-crack putty is applied to form the second putty layer 900, thus completing the construction of the cast structure; after the second putty layer 900 has been cured for 1 to 2 days, anti-crack putty is applied to the bottom of the entire floor slab, thus completing the construction of the bottom surface of the floor slab.

[0045] The embodiments of the invention provided in this specification have been described above. Those skilled in the art will be able to implement the embodiments of the invention provided in this specification based on these descriptions. All other preferred embodiments and implementations obtained by those skilled in the art based on the above description of the embodiments of the invention provided in this specification without inventive effort should fall within the protection scope of the embodiments of the invention provided in this specification.

Claims

1. A bottom formwork for supporting the casting of the post-cast strip at the joint of a composite slab, comprising a wooden formwork (130) adapted to the width of the post-cast strip (120), characterized in that: Also includes: A guide plate (200) is arranged along the direction of the joint post-cast strip (120), and a guide groove is formed between the side of the guide plate (200) and the side of the composite plate (110) on both sides of the joint post-cast strip (120). A transition mesh (300) is located below the guide vane (200); A sealing layer (400) is located between the bottom surface of the composite plate (110) on both sides of the joint post-pouring strip (120) and the top surface of the wooden formwork (130); A filler plate (500) is used to fill the bottom of the joint post-cast strip (120) and is located between the wooden formwork (130) and the transition mesh (300); The guide holes (600) are provided on the filler plate (500) and the wooden template (130). The guide holes (600) are located on both sides of the joint post-pouring strip (120) and are arranged at intervals along the direction of the joint post-pouring strip (120).

2. The bottom formwork for casting the post-cast strip at the joint of the composite slab as described in claim 1, characterized in that: The guide plate (200) includes an aluminum composite panel connected end to end along the direction of the post-cast strip (120) at the joint.

3. The bottom formwork for casting the post-cast strip at the joint of the composite slab as described in claim 2, characterized in that: Adjacent aluminum composite panels are bonded together; the sides of the aluminum composite panels are sloped.

4. The bottom formwork for casting the post-cast strip at the joint of the composite slab as described in claim 3, characterized in that: The aluminum composite panels are arranged in an inverted T-shape, with the angle between the slope and the horizontal plane being 25-35°.

5. The bottom formwork for casting the post-cast strip at the joint of the composite slab as described in claim 1, characterized in that: The transition mesh (300) is a metal fiber felt.

6. The bottom formwork for casting the post-cast strip at the joint of the composite slab as described in claim 1, characterized in that: The sealing layer (400) is a PE sponge strip.

7. The bottom formwork for casting the post-cast strip at the joint of the composite slab as described in claim 1, characterized in that: The diameter of the guide hole (600) is 4-8 mm, and the spacing between them along the direction of the post-cast strip (120) is 400-600 mm.

8. A post-cast strip structure for composite slab joints, comprising cast-in-place concrete (140), characterized in that: Also includes: A guide plate (200) is arranged along the direction of the joint post-cast strip (120), and a guide groove is formed between the side of the guide plate (200) and the side of the composite plate (110) on both sides of the joint post-cast strip (120). A transition mesh (300) is located below the guide vane (200); First putty layer (700), the first putty layer (700) is applied to the bottom surface of the transition mesh (300); A reinforcing mesh (800) is laid on the bottom surface of the first putty layer (700); the width of the reinforcing mesh (800) is greater than the width of the joint post-pouring strip (120); The second putty layer (900) is applied to the bottom surface of the reinforcing mesh (800).

9. The post-cast strip structure for composite slab joints as described in claim 8, characterized in that: The reinforcing mesh (800) is a fiberglass mesh.

10. The post-cast strip structure for composite slab joints as described in claim 9, characterized in that: The width of the reinforcing mesh (800) extending beyond the joint post-cast strip (120) at both ends is 100-200 mm.

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