Closed space top plate concrete assembly type formwork hoisting device and formwork hoisting method

Abstract

The invention relates to a closed space top plate concrete assembly type formwork hoisting device and method.The formwork hoisting device comprises a first bottom formwork, a second bottom formwork, a third bottom formwork, a fourth bottom formwork and a tie assembly, and the first bottom formwork, the second bottom formwork, the third bottom formwork and the fourth bottom formwork are arranged below reserved holes in a top plate in a staggered mode; the first bottom formwork, the second bottom formwork, the third bottom formwork and the fourth bottom formwork can be spliced to form a straight-plate-shaped pouring plate, a Z-shaped splicing seam is formed between any two adjacent bottom formworks of the first bottom formwork, the second bottom formwork, the third bottom formwork and the fourth bottom formwork in the longitudinal direction, and the pouring plate is installed at the bottom of the top plate in a pulling mode through a pulling assembly. The problem that the whole suspended formwork system device cannot be mounted from the outer side of the top plate is solved by adopting an assembling unit splicing technology, so that an operation channel does not need to be reserved for the concrete of the top plate in the closed space, the full-closed space is really realized, and the requirement of process design is met.

Description

Technical Field

[0001] This invention relates to the field of concrete construction technology, specifically to a prefabricated suspended formwork device and method for concrete roof slabs in enclosed spaces. Background Technology

[0002] In today's booming construction industry, many building structures are becoming increasingly complex. To achieve certain functions or coordinate with other professional construction methods, structural construction often cannot follow traditional techniques. During actual on-site construction, because traditional construction methods are unavailable, contractors often resort to non-standardized alternative methods. These methods struggle to meet the technical parameters specified in the design documents and also pose significant safety hazards. Take a concrete nitrogen venting chamber as an example. The chamber houses large equipment, and due to equipment installation constraints, the roof slab concrete construction must wait until the equipment is installed. Furthermore, to reduce construction noise impact on the surrounding environment, the space is designed as a closed structure. If a traditional formwork support system is used, the large equipment inside the closed space restricts the erection of the support system, and the formwork support system cannot be dismantled after concrete pouring, resulting in significant waste. If a traditional suspended formwork device is used, the formwork must be installed from inside the closed space, requiring an operating passage. However, this operating passage cannot meet the requirement of complete enclosure, affecting the effectiveness of the process. Therefore, we propose a prefabricated suspended formwork device and method for the roof slab concrete in closed spaces, which can solve the above two problems. Summary of the Invention

[0003] To address the aforementioned issues, we now provide a prefabricated formwork device and method for concrete roof slabs in enclosed spaces, aiming to effectively solve the construction problems of roof slab structures under enclosed structures.

[0004] The specific technical solution is as follows: The first aspect of the present invention is to provide a prefabricated suspended formwork device for a sealed space roof slab concrete, comprising: a first bottom formwork, a second bottom formwork, a third bottom formwork, a fourth bottom formwork, and a tie assembly. The first bottom formwork, the second bottom formwork, the third bottom formwork, and the fourth bottom formwork are staggered and arranged below pre-reserved holes on the roof slab. The first bottom formwork, the second bottom formwork, the third bottom formwork, and the fourth bottom formwork can be spliced ​​to form a flat slab-shaped casting slab. Any two adjacent bottom formworks among the first bottom formwork, the second bottom formwork, the third bottom formwork, and the fourth bottom formwork have a "Z"-shaped splicing joint in the longitudinal direction. The casting slab is tied and installed at the bottom of the roof slab by the tie assembly.

[0005] Furthermore, a first protruding plate is installed on the first bottom template. The cross-section of the first protruding plate is "L" shaped. The first protruding plate is installed on the lower part of two adjacent sides of the first bottom template. The corner of the first protruding plate is recessed downward to form a first splicing groove. Multiple first bolt holes are spaced apart on the first protruding plate, and first fastening bolts are inserted into the first bolt holes.

[0006] Furthermore, a second protruding plate is installed on the second bottom template. The cross-section of the second protruding plate is "L" shaped. The second protruding plate is installed on the upper part of two adjacent sides of the second bottom template. The corner of the second protruding plate is recessed upward to form a second splicing groove. The part of the second protruding plate adjacent to the first bottom template is stacked on top of part of the first protruding plate. Part of the second protruding plate is fastened to the first protruding plate by the first fastening bolt.

[0007] Furthermore, a third protruding plate is installed on the third bottom template. The cross-section of the third protruding plate is "L" shaped. The third protruding plate is installed on the lower part of the two adjacent sides of the third bottom template. The corner of the third protruding plate is recessed upward to form a third splicing groove that cooperates with the first splicing groove. Multiple second bolt holes are spaced apart on the third protruding plate. Second fastening bolts are inserted into the second bolt holes. The second protruding plate adjacent to the third bottom template is stacked on top of the third protruding plate. The second protruding plate is fastened to the third protruding plate by the second fastening bolts.

[0008] Furthermore, a fourth protruding plate is installed on the fourth bottom template. The cross-section of the fourth protruding plate is "L" shaped. The fourth protruding plate is installed on the upper part of two adjacent sides of the fourth bottom template. The corner of the fourth protruding plate is recessed downward to form a fourth splicing groove that cooperates with the second splicing groove. The two sides of the fourth protruding plate are respectively stacked on a portion of the first protruding plate and a portion of the third protruding plate. The two sides of the fourth protruding plate are fastened to the first protruding plate and the third protruding plate by the first fastening bolt and the second fastening bolt, respectively.

[0009] Furthermore, the tie assembly includes four hangers, four support rods, four butterfly buckles, and four tie nuts. The bottom of the hangers is respectively installed on the first bottom template, the second bottom template, the third bottom template, and the fourth bottom template. The butterfly buckles are respectively threaded onto the hangers, the tie nuts are respectively screwed onto the hangers, and the support rods are respectively installed on the adjacent butterfly buckles.

[0010] Furthermore, the width of each side of the cast slab extends 40-60 mm beyond the pre-reserved opening.

[0011] Furthermore, the first, second, third, and fourth bottom templates are made of steel plates.

[0012] A second aspect of the present invention is to provide a method for prefabricated suspended formwork of concrete roof slab in a confined space, comprising: Erect a formwork support system, reserve a material outlet, pour the top slab concrete, and remove the formwork and support system after the concrete strength meets the demolding conditions. Design the discharge port formwork system according to the discharge port size, concrete slab thickness, etc., process the materials required for the discharge port formwork according to the design drawings, and then install the lifting rods on the bottom formwork accordingly. Use the hanger rod to place the first bottom formwork inside the reserved opening, adjust the position and angle of the hanger rod, and repeat the above steps to install the third bottom formwork at the diagonal position of the first bottom formwork; Repeat the above steps to install the second and fourth bottom templates to the designated positions. Connect the four assembly unit bottom templates into a whole by using bolts and nuts, and check the template flatness, joint tightness and other indicators. By tightening the tie nuts on the support rods, the entire formwork device is lifted, ensuring that the poured slab is in close contact with the concrete surface and preventing grout leakage. Treat the construction joint around the discharge port, apply interface agent, connect the broken steel bars at the discharge port, and pour concrete into the reserved opening. The suspended formwork system was dismantled, and components such as support rods and butterfly buckles were recycled and reused. Excess rods were cut off, and the exposed parts of the suspended formwork system rods were treated with anti-corrosion and anti-rust treatment and encased in concrete for protection.

[0013] Furthermore, micro-expansion concrete is used to pour the reserved openings to form a complete roof slab.

[0014] The beneficial effects of the above scheme are: The present invention uses assembly unit assembly technology to solve the problem that the formwork system cannot be installed as a whole from the outside of the top plate, so that the concrete of the top plate of the enclosed space no longer needs to reserve a working channel, and truly realizes the full enclosure of the space, which meets the requirements of process design. The bottom templates of this invention have a "Z"-shaped joint, which extends the path of cement slurry seepage and solves the problem of easy slurry leakage at the template joints. At the same time, the use of bolts instead of welding can effectively avoid the hidden danger of slurry leakage caused by the joints being torn, thus improving the quality of concrete construction. The hoisting device provided by this invention leaves a certain amount of operating space after assembly and installation, which solves the problem that the assembly unit needs to be assembled and adjusted in the reserved opening, and finally the whole is lifted to meet the design requirements. This invention uses modular assembly technology to replace the traditional formwork installation and dismantling process. The suspended formwork system is easy to install, reduces the need for specialized workers, ensures safe construction, saves labor costs, and improves construction efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the lifting formwork device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of the first bottom template and the third bottom template provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first bottom template provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the third bottom template provided in an embodiment of the present invention; Figure 5 A schematic diagram of the use of the lifting formwork device provided in the embodiments of the present invention.

[0016] In the attached diagram: 1. First bottom template; 11. First protruding plate; 12. First splicing groove; 2. Second bottom template; 3. Third bottom template; 31. Third protruding plate; 32. Third splicing groove; 4. Fourth bottom template; 5. Top plate; 6. Hanging rod; 7. Support rod; 8. Butterfly buckle; 9. Tie nut. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0020] like Figures 1 to 5 As shown, the enclosed space roof concrete prefabricated hanging formwork system device provided in the embodiment of the present invention includes a first bottom formwork 1, a second bottom formwork 2, a third bottom formwork 3, a fourth bottom formwork 4, and a tie assembly. The first bottom formwork 1, the second bottom formwork 2, the third bottom formwork 3, and the fourth bottom formwork 4 are staggered and arranged below the reserved holes on the roof slab 5. The first bottom formwork 1, the second bottom formwork 2, the third bottom formwork 3, and the fourth bottom formwork 4 can be spliced ​​to form a flat plate-shaped casting slab. The casting slab is tied and installed at the bottom of the roof slab 5 by the tie assembly. Subsequently, concrete can be poured into the reserved holes between the casting slab and the roof slab 5, and after curing, an enclosed space can be obtained.

[0021] The above-mentioned formwork hoisting device in this invention not only solves the limitations of traditional formwork support systems and overcomes the difficulties of traditional formwork support systems in the construction of top slab concrete in confined spaces or where the erection of support systems is restricted, but also realizes the possibility of installing the formwork hoisting system device from outside the opening by adopting the prefabricated installation of bottom formwork units.

[0022] In this invention, any two adjacent templates among the first bottom template 1, second bottom template 2, third bottom template 3, and fourth bottom template 4 have a "Z"-shaped splicing joint in the longitudinal direction, which extends the path of cement grout seepage, solves the problem of easy grout leakage at template splicing joints, and improves the quality of concrete construction. It not only reflects the modern construction industry's pursuit of efficient and safe construction tools, but also provides construction workers with a more efficient and safer construction method, which has a significant effect on improving the overall project quality and accelerating the construction progress.

[0023] As a concrete example, such as Figures 1 to 4 As shown, a first protruding plate 11 is installed on the first bottom template 1. The cross-section of the first protruding plate 11 is "L" shaped. The first protruding plate 11 is installed on the lower part of two adjacent sides of the first bottom template 1. The corner of the first protruding plate 11 is recessed downward to form a first splicing groove 12. Correspondingly, a third protruding plate 31 is installed on the third bottom template 3. The cross-section of the third protruding plate 31 is "L" shaped. The third protruding plate 31 is installed on the lower part of two adjacent sides of the third bottom template 3. The corner of the third protruding plate 31 is recessed upward to form a third splicing groove 32 that cooperates with the first splicing groove 12. In this invention, the first protruding plate 11 and the third protruding plate 31 are spliced ​​together by the first splicing groove 12 and the third splicing groove 32 to form a straight lower protruding plate. Similarly, in this invention, a second protruding plate is installed on the second bottom template 2. The cross-section of the second protruding plate is "L"-shaped. The second protruding plate is installed on the upper part of two adjacent sides of the second bottom template 2. The corner of the second protruding plate is recessed upward to form a second splicing groove. A fourth protruding plate is installed on the fourth bottom template 4. The cross-section of the fourth protruding plate is "L"-shaped. The fourth protruding plate is installed on the upper part of two adjacent sides of the fourth bottom template 4. The corner of the fourth protruding plate is recessed downward to form a fourth splicing groove that cooperates with the second splicing groove. In this invention, the second and fourth protruding plates are spliced ​​together by the second and fourth splicing grooves to form a straight upper protruding plate. This upper protruding plate can be stacked and fixed on the lower protruding plate to assemble the four bottom templates into a casting slab. Further, as... Figure 1 As shown, the gaps between the fourth protruding plate and the first bottom formwork, the gap between the bottom of the fourth protruding plate and the top of the first protruding plate, and the gap between the first protruding plate and the fourth bottom formwork, all form a "Z"-shaped splice in the longitudinal direction, thereby extending the path of cement grout seepage and solving the problem of grout leakage at the formwork joints. It is not difficult to understand that, as... Figures 1 to 4 As shown, in this invention, any two adjacent bottom templates have a "Z"-shaped splicing seam in the longitudinal direction. As a specific example, in this invention, the first protruding plate 11 has a plurality of first bolt holes spaced apart, and first fastening bolts are installed in the first bolt holes; the third protruding plate 31 has a plurality of second bolt holes spaced apart, and second fastening bolts are inserted into the second bolt holes, thereby fastening the upper and lower stacked protruding plates together by means of the fastening bolts. The bolted connection method in this invention not only facilitates operation in the narrow space within the reserved holes, but also effectively avoids the risk of grout leakage due to joint tearing by using bolted connections instead of welding connections, thus improving the quality of concrete construction.

[0024] As a concrete example, such as Figure 1 , Figure 5 As shown, the tie assembly in this invention includes four hangers 6, four support rods 7, four butterfly buckles 8, and four tie nuts 9. The bottoms of the hangers 6 are respectively installed on the first bottom template 1, the second bottom template 2, the third bottom template 3, and the fourth bottom template 4. The butterfly buckles 8 are respectively inserted through the hangers 6. The tie nuts 9 are respectively screwed onto the hangers 6. The support rods 7 are respectively installed on the adjacent butterfly buckles 8. The above structure can be assembled by passing the corresponding bottom template through the reserved holes using the hangers 6. After assembly, the casting plate is hoisted below the reserved holes using the support rods 7. Then, the tie nuts 9 are rotated to lift the device below the top plate 5, so that the casting plate is in close contact with the bottom of the top plate 5. Concrete can then be poured into the reserved holes between the casting plate and the top plate 5. After curing, a sealed space can be obtained.

[0025] The formwork hoisting method of the above-mentioned enclosed space roof concrete prefabricated formwork system in this invention includes: Erect a formwork support system, reserve a discharge port, pour 5g of concrete for the top slab, and remove the formwork and support system after the concrete strength meets the demolding conditions. Design the discharge port formwork system according to the discharge port size, concrete slab thickness, etc., process the materials required for the discharge port formwork according to the design drawings, and then install the hanging rods 6 on the bottom formwork accordingly. Use the hanger 6 to place the first bottom template 1 inside the reserved opening, adjust the position and angle of the hanger 6, and repeat the above steps to install the third bottom template 3 at the diagonal position of the first bottom template 1; Repeat the above steps to install the second bottom template 2 and the fourth bottom template 4 to the designated positions. Connect the four assembly unit bottom templates into a whole by using bolts and nuts, and check the template flatness, joint tightness and other indicators. By tightening the tie nut 9 on the support rod 7, the entire formwork device is lifted, ensuring that the pouring slab is in close contact with the concrete surface and preventing grout leakage. Treat the construction joint around the discharge port, apply interface agent, connect the broken steel bars at the discharge port, and pour micro-expansion concrete into the reserved opening. The formwork system was dismantled, and components such as support rods 7 and butterfly buckles 8 were recycled and reused. Excess rods 6 were cut off, and the exposed parts of the rods 6 in the formwork system were treated with anti-corrosion and anti-rust treatment and encased in concrete for protection.

[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated suspended formwork device for the top slab of a confined space, characterized in that, include: The first, second, third, and fourth bottom templates, along with a tie assembly, are staggered below the pre-drilled holes on the top slab. These templates can be joined to form a flat, slab-shaped casting slab. Any two adjacent bottom templates have a "Z"-shaped joint in the longitudinal direction. The casting slab is tied to the bottom of the top slab using the tie assembly.

2. The prefabricated suspended formwork device for the top slab of a sealed space according to claim 1, characterized in that, A first protruding plate is installed on the first bottom template. The cross-section of the first protruding plate is "L" shaped. The first protruding plate is installed on the lower part of two adjacent sides of the first bottom template. The corner of the first protruding plate is recessed downward to form a first splicing groove. A plurality of first bolt holes are spaced apart on the first protruding plate, and first fastening bolts are inserted into the first bolt holes.

3. The prefabricated suspended formwork device for the top slab of a sealed space according to claim 2, characterized in that, A second protruding plate is installed on the second bottom template. The cross-section of the second protruding plate is "L" shaped. The second protruding plate is installed on the upper part of two adjacent sides of the second bottom template. The corner of the second protruding plate is recessed upward to form a second splicing groove. The part of the second protruding plate adjacent to the first bottom template is stacked on top of part of the first protruding plate. Part of the second protruding plate is fastened to the first protruding plate by the first fastening bolt.

4. The prefabricated suspended formwork device for the top slab of a sealed space according to claim 3, characterized in that, A third protruding plate is installed on the third bottom template. The cross-section of the third protruding plate is "L" shaped. The third protruding plate is installed on the lower part of two adjacent sides of the third bottom template. The corner of the third protruding plate is recessed upward to form a third splicing groove that cooperates with the first splicing groove. A plurality of second bolt holes are spaced apart on the third protruding plate. Second fastening bolts are inserted into the second bolt holes. The second protruding plate adjacent to the third bottom template is stacked on top of the third protruding plate. The second protruding plate is fastened to the third protruding plate by the second fastening bolts.

5. The prefabricated suspended formwork device for the top slab of a sealed space according to claim 4, characterized in that, A fourth protruding plate is installed on the fourth bottom template. The cross-section of the fourth protruding plate is "L" shaped. The fourth protruding plate is installed on the upper part of two adjacent sides of the fourth bottom template. The corner of the fourth protruding plate is recessed downward to form a fourth splicing groove that cooperates with the second splicing groove. The two sides of the fourth protruding plate are respectively stacked on a portion of the first protruding plate and a portion of the third protruding plate. The two sides of the fourth protruding plate are respectively fastened to the first protruding plate and the third protruding plate by the first fastening bolt and the second fastening bolt.

6. The prefabricated suspended formwork device for the top slab of a sealed space according to any one of claims 1-5, characterized in that, The tying assembly includes four hanging rods, four support rods, four butterfly buckles, and four tying nuts. The bottom of the hanging rods is respectively installed on the first bottom template, the second bottom template, the third bottom template, and the fourth bottom template. The butterfly buckles are respectively threaded onto the hanging rods. The tying nuts are respectively screwed onto the hanging rods. The support rods are respectively installed on the adjacent butterfly buckles.

7. The prefabricated suspended formwork device for the top slab of a sealed space according to any one of claims 1-5, characterized in that, The width of each side of the cast-in-place slab extends 40-60 mm beyond the reserved opening.

8. The prefabricated suspended formwork device for the top slab of a sealed space according to any one of claims 1-5, characterized in that, The first bottom template, the second bottom template, the third bottom template, and the fourth bottom template are made of steel plates.

9. A method for prefabricated suspended formwork for the top slab of a confined space, characterized in that, The enclosed space roof concrete prefabrication hoisting formwork device according to any one of claims 6-8 includes: Erect a formwork support system, reserve a material outlet, pour the top slab concrete, and remove the formwork and support system after the concrete strength meets the demolding conditions. Design the discharge port formwork system according to the discharge port size, concrete slab thickness, etc., process the materials required for the discharge port formwork according to the design drawings, and then install the lifting rods on the bottom formwork accordingly. Using the lifting rod, place the first bottom template inside the reserved opening, adjust the position and angle of the lifting rod, and repeat the above steps to install the third bottom template at the diagonal position of the first bottom template; Repeat the above steps to install the second and fourth bottom templates to the designated positions. Connect the four assembly unit bottom templates into a whole by using bolts and nuts, and check the template flatness, joint tightness and other indicators. By tightening the tie nuts on the support rods, the entire formwork device is lifted, ensuring that the poured slab is in close contact with the concrete surface and preventing grout leakage. Treat the construction joint around the discharge port, apply interface agent, connect the broken steel bars at the discharge port, and pour concrete into the reserved opening. The suspended formwork system was dismantled, and components such as support rods and butterfly buckles were recycled and reused. Excess rods were cut off, and the exposed parts of the suspended formwork system rods were treated with anti-corrosion and anti-rust treatment and encased in concrete for protection.

10. The method for prefabricated suspended formwork of concrete roof slab in a confined space according to claim 9, characterized in that, Micro-expansion concrete was used to pour the reserved openings to form a complete roof slab.

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