A construction method for sawtooth outer edge of cast-in-place floor slabs

Abstract

This application relates to the technical field of cast-in-place floor slab edge construction, and proposes a method for constructing a sawtooth-shaped outer edge of a cast-in-place floor slab. A sawtooth-shaped side mold is provided on one long side of a template component. The sawtooth-shaped side mold is composed of several V-shaped side mold units. Each V-shaped side mold unit includes a main connecting plate and a secondary connecting plate. The extension plate at the movable end of the main connecting plate is slidably hinged to a groove at the top of the secondary connecting plate via a pin. The fixed ends of both the main and secondary connecting plates are hinged to a bottom mold. By sequentially swinging the main and secondary connecting plates of different V-shaped template units, multiple sets of protrusions at specific angles can be quickly assembled, facilitating the subsequent shaping of the pointed protrusions. This application simplifies and facilitates the installation of the sawtooth-shaped outer edge of the floor slab.

Description

Technical Field

[0001] This application relates to the technical field of cast-in-place floor slab outer edge construction, and in particular to a method for constructing a sawtooth outer edge of a cast-in-place floor slab. Background Technology

[0002] During building construction, a serrated outer edge is usually poured around the perimeter of the floor slab to facilitate the installation of glass curtain walls using the serrated outer edges of adjacent floor slabs as fulcrums.

[0003] Currently, to create the sawtooth outer edge of the floor slab, wooden formwork (including a bottom formwork, sealing side formwork on the two short sides of the bottom formwork, and a sawtooth side formwork on one long side of the bottom formwork) needs to be erected on the outside of the floor slab first. Then, steel mesh is tied inside the bottom formwork. Finally, concrete is poured into the cavity formed by the bottom formwork, sealing side formwork, sawtooth side formwork, and the outside of the floor slab to form the sawtooth outer edge.

[0004] According to architectural design requirements, such as Figure 1 The angle of the individual tip protrusion 101 in the serrated outer edge 10 needs to gradually decrease along the length of the outer side of the floor slab 1. Therefore, when setting up the serrated side formwork, the construction workers need to first cut two sets of wooden boards of appropriate length according to the angle of each tip protrusion in the design drawings, then splice the two sets of wooden boards to form a V shape at a specific angle and fix them on the bottom formwork to achieve the subsequent forming of the tip protrusion of the serrated outer edge. The setting up of the formwork is relatively complicated and cumbersome, which affects the construction cycle of the serrated outer edge. Summary of the Invention

[0005] To simplify and facilitate the formwork erection of the serrated outer edge of the floor slab, this application provides a construction method for the serrated outer edge of a cast-in-place floor slab.

[0006] This application provides a construction method for a sawtooth outer edge of a cast-in-place floor slab, which adopts the following technical solution:

[0007] A method for constructing a sawtooth outer edge of a cast-in-place floor slab includes the following steps:

[0008] S1: Precast template component, the template component includes a bottom mold, the bottom mold has sealing side molds on two short sides, and a serrated side mold on one long side. The serrated side mold is composed of several V-shaped side mold units. Each V-shaped side mold unit includes a main connecting plate and a secondary connecting plate. The two ends of the main connecting plate and the secondary connecting plate are respectively a fixed end and a movable end. The top of the secondary connecting plate has a sliding groove. The top of the movable end of the main connecting plate has an extension plate protruding from it. The end of the extension plate away from the main connecting plate is slidably hinged in the sliding groove by a pin. The main connecting plate is also provided with a locking element to limit the swing of both the main connecting plate and the secondary connecting plate. The fixed ends of both the main connecting plate and the secondary connecting plate are hinged to the bottom mold. The fixed ends of both the main connecting plate and the secondary connecting plate are arc-shaped. The fixed ends of the main connecting plates and the secondary connecting plates of adjacent V-shaped side mold units abut against each other.

[0009] S2: Erect formwork support scaffolding on the outside of the floor slab;

[0010] S3: Erect the template components on top of the template support scaffolding;

[0011] S4: Apply release agent to the bottom mold, serrated side mold, and sealing side mold;

[0012] S5: Swing the main connecting plate and the auxiliary connecting plate of each V-shaped side mold unit in sequence, so that the main connecting plate and the auxiliary connecting plate of each V-shaped side mold unit form a V shape at a specific angle, and restrict the swing of the main connecting plate and the auxiliary connecting plate by locking parts.

[0013] S6: Tie the steel mesh onto the bottom formwork;

[0014] S7: Pour concrete into the mold cavity formed by the bottom mold, the serrated side mold, the two sets of sealing side molds and the outside of the floor slab and then cure it.

[0015] S8: Remove the formwork support scaffolding and formwork components.

[0016] By adopting the above technical solution, when setting up the serrated side mold, the main connecting plate and the auxiliary connecting plate of each V-shaped side mold unit can be swung in sequence to quickly form several V-shapes at specific angles, which facilitates the formation of protrusions at different angles. Compared with the traditional method of cutting two sets of wooden boards according to the angle of each protrusion in the design drawings and then splicing them to form a V-shape at a specific angle, this method is more efficient. In addition, the angle between the main connecting plate and the auxiliary connecting plate of this application can be infinitely adjusted, which greatly improves the application range of the template. After the serrated edge is poured, the serrated edge of the template can be removed, which facilitates the reuse of the template. Compared with the traditional method of setting up wooden molds, this method can save costs and makes the setting up of the template simpler and more convenient.

[0017] Preferably, the bottom mold has two sets of insertion slots corresponding to the two sets of sealing side molds, and the two sets of sealing side molds are respectively inserted into the corresponding insertion slots; the bottom of the fixed ends of the main connecting plate and the auxiliary connecting plate are both fixed with hinge shafts, and the bottom mold has several hinge holes corresponding to several hinge shafts, and the hinge shafts are inserted into the corresponding hinge holes.

[0018] By adopting the above technical solution, the sealing side mold and the serrated side mold can be detachably connected to the bottom mold, so that the template parts do not need to be integrally formed. This makes it easy to remove the serrated side mold and the sealing side mold from the bottom mold for cleaning. By moving the main connecting plate and the secondary connecting plate until the hinge shafts at the bottom of the main connecting plate and the secondary connecting plate are disengaged from the corresponding hinge holes, the serrated side mold can be removed from the bottom mold.

[0019] Preferably, the locking component includes a limiting screw threaded to the outer periphery of the pin shaft. The end of the limiting screw away from the pin shaft extends through the side of the secondary connecting plate opposite to the main connecting plate. The side of the secondary connecting plate opposite to the main connecting plate has an elongated through groove for the limiting screw to slide. The end of the limiting screw extending out of the secondary connecting plate is coaxially fixed with a tightening nut.

[0020] By adopting the above technical solution, after swinging the main connecting plate and the secondary connecting plate to the required position, the limiting screw is rotated until the clamping nut on the limiting screw is clamped to the side of the secondary connecting plate away from the main connecting plate. This restricts the pin from sliding in the groove, thereby limiting the position of the main connecting plate and the secondary connecting plate. This makes it less likely for the main connecting plate and the secondary connecting plate to shift when concrete is poured into the mold cavity.

[0021] Preferably, the template support scaffold includes several I-beams fixed to the lower floor slab. One end of each I-beam extends out of the lower floor slab to form a cantilever end. Each cantilever end of the I-beam is vertically provided with several vertical pipes. The top of each vertical pipe is provided with a top support for supporting the bottom formwork. The height of the top support is adjustable.

[0022] By adopting the above technical solution, the cantilever end of the I-beam of the lower floor slab is used as the fulcrum for the erection of the formwork support scaffold. This eliminates the need to start the erection of the formwork support scaffold from the ground, saving on raw materials such as steel pipes required for scaffolding. More importantly, the erection of the formwork support scaffold does not interfere with the pouring position of the sawtooth outer edge of the floor slab, facilitating the simultaneous pouring of different floor slabs along their sawtooth outer edges.

[0023] Preferably, the bottom of the bottom mold is fixed with several square rods; the top support includes a rotating nut coaxially rotatably connected to the top of the riser, the rotating nut being coaxially rotatably connected to a threaded rod, the top of the threaded rod being rotatably connected to a limiting block, and the top of the limiting block having a limiting groove for the square rod to be embedded.

[0024] By adopting the above technical solution, when assembling the template, the square rod at the bottom of the bottom formwork can be embedded into the limiting groove to limit the bottom formwork, making the bottom formwork support simpler and more convenient. The threaded rod is coaxially threaded into the rotating nut, and the height of the threaded rod and the limiting block can be adjusted by rotating the rotating nut. This makes it easy to adjust the height of the limiting block according to the actual construction needs, and makes it easier for the square rod at the bottom of the bottom formwork to be embedded into the limiting groove, which helps to improve the applicability of the template support scaffolding.

[0025] Preferably, the upper surface of the secondary connecting plate is also provided with a scale.

[0026] By adopting the above technical solution, during the actual construction process, the construction personnel can use a certain scale on the secondary connecting plate as a reference and swing the main connecting plate so that the movable end of the main connecting plate reaches the scale position, so that the secondary connecting plate and the main connecting plate can quickly form a V shape at a specific angle, which facilitates the rapid positioning of the main connecting plate and the secondary connecting plate.

[0027] Preferably, the cantilever end of the I-beam is provided with several insertion sleeves corresponding to several risers, and the bottom ends of several risers are inserted into the corresponding insertion sleeves. Locking bolts are threaded through the outer circumference of the insertion sleeves, and the locking bolts are abutted against the outer circumference of the risers.

[0028] By adopting the above technical solution, the riser can be detachably connected to the I-beam. The riser can be connected to the I-beam by inserting it into the plug sleeve. The riser can be removed from the plug sleeve by removing it from the corresponding plug sleeve, making the assembly and disassembly of the riser simpler and more convenient. With the setting of the locking bolt, after the riser is inserted into the plug sleeve, the locking bolt is turned until the locking bolt is pressed against the outer circumference of the riser, so that the riser is not easy to detach from the plug sleeve.

[0029] Preferably, the extension plate has a through hole, and the pin is rotatably inserted into the through hole.

[0030] By adopting the above technical solution, the pin shaft is rotatably connected to the extension plate. After moving the main connecting plate and the secondary connecting plate to the required position, the pin shaft can be rotated so that the screw on the pin shaft is perpendicular to the side of the secondary connecting plate along its own axis. This makes it easier for the clamping nut on the subsequent limiting screw to better clamp against the secondary connecting plate, and thus makes it easier to better restrict the pin shaft from sliding in the groove by using the clamping nut.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. A serrated side mold is provided on one long side of the template component. The serration is composed of several V-shaped side mold units. The V-shaped side mold includes a main connecting plate and a secondary connecting plate. The extension plate at the movable end of the main connecting plate is slidably hinged to the pin groove at the top of the secondary connecting plate through a pin. The fixed ends of the main connecting plate and the secondary connecting plate are hinged to the bottom mold. By swinging each group of V-shaped side mold units in sequence, the main connecting plate and the secondary connecting plate can be spliced ​​to form V-shapes with different specific angles, which facilitates the subsequent forming of the pointed protrusion. With the setting of the locking device, after the position of the main connecting plate and the secondary connecting plate is adjusted, the swing of the main connecting plate and the secondary connecting plate is restricted by the locking device, so that the main connecting plate and the secondary connecting plate are not easily displaced when pouring concrete.

[0033] 2. The locking component includes a limiting screw threaded onto a pin. The end of the limiting screw away from the pin extends out of the secondary connecting plate away from the main connecting plate. The secondary connecting plate has a long through groove for the limiting screw to slide. The end of the limiting screw away from the pin is also coaxially fixed with a clamping nut. By rotating the limiting screw until the clamping nut clamps against the secondary connecting plate, the swing of the main connecting plate and the secondary connecting plate can be restricted.

[0034] 3. The pin is inserted into the through hole on the extension plate. When it is necessary to limit the swing of the main connecting plate and the secondary connecting plate, the limit screw can be made to be perpendicular to the secondary connecting plate along the axis by the swing pin, so that the subsequent tightening nut can be better tightened with the secondary connecting plate. Attached Figure Description

[0035] Figure 1 This is a schematic diagram used in this application to illustrate the sawtooth outer edge of an existing floor slab.

[0036] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0037] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0038] Figure 4 This is a schematic diagram illustrating the connection relationship between the main connecting plate, the secondary connecting plate, and the sealing side mold and the bottom mold in an embodiment of this application.

[0039] Figure 5 yes Figure 2 Enlarged schematic diagram of section B.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Floor slab; 10. Serrated outer edge; 101. Tip protrusion; 2. Bottom formwork; 20. Hinge hole; 21. Sealing side formwork; 22. Main connecting plate; 221. Extension plate; 222. Pin shaft; 23. Secondary connecting plate; 231. Slide groove; 232. Long through groove; 24. Limiting screw; 241. Tightening nut; 25. Insertion groove; 26. Square bar; 27. Hinge shaft; 3. Formwork support scaffolding; 31. I-beam; 310. Insertion sleeve; 311. Connecting screw; 312. Locking nut; 313. Pressure plate; 314. Locking bolt; 32. Riser; 321. Rotary nut; 322. Threaded rod; 323. Limiting block; 324. Limiting groove; 33. Horizontal bar; 34. Longitudinal bar. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0043] This application discloses a construction method for a sawtooth-shaped outer edge of a cast-in-place floor slab, referring to... Figure 2 and Figure 3 This includes the following steps:

[0044] S1: The template component includes a bottom mold 2, which is rectangular in shape. Two short sides of the bottom mold 2 are vertically supported by sealing side molds 21, and one long side of the bottom mold 2 is supported by a serrated side mold. Several square rods 26 are fixed to the lower surface of the bottom mold 2, and these square rods 26 are arranged in parallel.

[0045] Reference Figure 2 and Figure 3 The serrated side mold is composed of several independent V-shaped side mold units. The V-shaped side mold unit includes a main connecting plate 22 and a secondary connecting plate 23. Both ends of the main connecting plate 22 and the secondary connecting plate 23 are fixed ends and movable ends, respectively. The fixed ends of both the main connecting plate 22 and the secondary connecting plate 23 are hinged to the bottom mold 2.

[0046] Reference Figure 2 and Figure 3 Both the main connecting plate 22 and the auxiliary connecting plate 23 have arc-shaped fixed ends. The fixed ends of the main connecting plate 22 and the auxiliary connecting plate 23 of the adjacent V-shaped side formwork unit abut against each other, so that when the main connecting plate 22 and the auxiliary connecting plate 23 rotate, the fixed ends of the main connecting plate 22 and the auxiliary connecting plate 23 of the adjacent V-shaped side formwork unit are less likely to have gaps. This helps to reduce the situation where concrete seeps out from between the fixed ends of the main connecting plate 22 and the auxiliary connecting plate 23 of the adjacent V-shaped side formwork unit during subsequent concrete pouring.

[0047] Reference Figure 2 and Figure 3The main connecting plate 22 has an extension plate 221 fixedly protruding from the top of its movable end. The extension plate 221 extends toward the fixed end away from the main connecting plate 22. The top of the secondary connecting plate 23 has a groove 231. The top of the extension plate 221 is slidably hinged in the groove 231 by a pin 222. The axial direction of the pin 222 is parallel to the rotation axis of the main connecting plate 22. With the above arrangement, by swinging the main connecting plate 22, the main connecting plate 22 and the secondary connecting plate 23 can be driven to quickly form a V shape at a specific angle, which is convenient for the subsequent forming of the serrated outer edge 10 tip protrusion 101.

[0048] Reference Figure 2 and Figure 3 A locking element is also provided between the main connecting plate 22 and the auxiliary connecting plate 23. The locking element is used to restrict the swing of the main connecting plate 22 and the auxiliary connecting plate 23, so that the main connecting plate 22 and the auxiliary connecting plate 23 are not easily displaced or deformed during subsequent concrete pouring. The locking element includes a limiting screw 24 threaded to the outer periphery of the pin 222, and the axial direction of the limiting screw 24 is perpendicular to the axial direction of the pin 222. The end of the limiting screw 24 away from the pin 222 extends out of the auxiliary connecting plate 23 on the side away from the main connecting plate 22. The side of the auxiliary connecting plate 23 away from the main connecting plate 22 also has an elongated through groove 232 for the limiting screw 24 to slide. The length direction of the elongated through groove 232 is parallel to the length direction of the sliding groove 231 and the elongated through groove 232 is connected to the sliding groove 231. One end of the limiting screw 24 extending out of the secondary connecting plate 23 is coaxially fixed with a clamping nut 241. By rotating the limiting screw 24 until the clamping nut 241 abuts against the side of the secondary connecting plate 23 away from the main connecting plate 22, the sliding of the pin 222 in the slide groove 231 can be restricted, thereby restricting the swing of both the main connecting plate 22 and the secondary connecting plate 23.

[0049] Reference Figure 2 and Figure 3 The extension plate 221 has a through hole, and the pin 222 passes through the through hole to realize the rotatable connection of the pin 222 to the extension plate 221. When it is necessary to restrict the pin 222 from sliding in the slide groove 231, by rotating the pin 222, the limiting screw 24 can be perpendicular to the secondary connecting plate 23 along the axial direction, so that the subsequent tightening nut 241 can be better pressed against the side of the secondary connecting plate 23.

[0050] Reference Figure 2 and Figure 3 The top of the secondary connecting plate 23 is also provided with a scale. By setting the scale, the main connecting plate 22 and the secondary connecting plate 23 can be adjusted, so that the main connecting plate 22 can be swung with the scale value as a reference, and the main connecting plate 22 and the secondary connecting plate 23 can quickly form a V shape at a specific angle.

[0051] Reference Figure 2 and Figure 4The upper surface of the bottom mold 2 has two sets of insertion slots 25 corresponding to the two sets of sealing side molds 21. The bottom of the two sets of sealing side molds 21 are respectively inserted into the corresponding insertion slots 25. The bottom of the fixed ends of the main connecting plate 22 and the auxiliary connecting plate 23 are both fixed with hinge shafts 27. The upper surface of the bottom mold 2 has several hinge holes 20 corresponding to several hinge rods. The hinge shafts 27 at the bottom of the main connecting plate 22 and the auxiliary connecting plate 23 are respectively inserted into the corresponding hinge holes 20, so as to realize the swing of the main connecting plate 22 and the auxiliary connecting plate 23. At the same time, the sealing side molds 21, the main connecting plate 22 and the auxiliary connecting plate 23 can be detachably connected to the bottom mold 2, so that the template parts do not need to be integrally formed. It is convenient to clean the sealing side molds 21, the main connecting plate 22 and the auxiliary connecting plate 23.

[0052] Reference Figure 2 and Figure 3 The movable end surface of the main connecting plate 22 is covered with a rubber layer, which helps to improve the sealing between the movable end of the main connecting plate 22 and the auxiliary connecting plate 23. When concrete is poured into the mold cavity later, the concrete is less likely to overflow from the gap between the movable end of the main connecting plate 22 and the auxiliary connecting plate 23.

[0053] Reference Figure 2 and Figure 5 S2: A formwork support scaffold 3 is erected on the outside of floor slab 1. The support scaffold includes several I-beams 31 installed on the lower floor slab 1, which are fixed to the lower floor slab 1 by several anchoring components. The anchoring components include two sets of connecting bolts 311 pre-embedded in the lower floor slab 1. The I-beams 31 are located between the two sets of connecting bolts 311. A pressure plate 313 is also provided on the top of the I-beams 31. The pressure plate 313 has two sets of through holes corresponding to the two sets of connecting bolts 311. The pressure plate 313 is fitted onto the two sets of connecting bolts 311 through the two sets of through holes, and the bottom of the pressure plate 313 abuts against the top of the I-beams 31. The top of each set of connecting bolts 311 is threaded with a locking nut 312, and the locking nut 312 abuts against the side of the pressure plate 313 away from the I-beams 31.

[0054] Reference Figure 2 and Figure 5 One end of the I-beam 31 extends beyond the outer side of the lower floor slab 1 to form a cantilever end. The supporting scaffold also includes several vertical risers 32 installed at the cantilever ends of the I-beam 31. In this embodiment, the risers 32 are steel pipes, and the top of the risers 32 is provided with a top support member. The height of the top support member is adjustable, and the top support member is used to support the bottom formwork 2.

[0055] Reference Figure 2 and Figure 5A rotating nut 321 is coaxially rotatable on the top of the riser 32. A threaded rod 322 is coaxially threaded to the rotating nut 321. A limiting block 323 is rotatably connected to the top of the threaded rod 322. A limiting groove 324 is formed on the top of the limiting block 323 for the square rod 26 to be inserted. The height of the limiting block 323 can be adjusted by rotating the rotating nut 321, facilitating better insertion of the square rod 26 at the bottom of the bottom mold 2 into the limiting groove 324.

[0056] Reference Figure 2 and Figure 5 The upper surface of the cantilever end of the I-beam 31 is fixed with several vertically upward-pointing insert sleeves 310. The bottom end of each vertical pole is inserted into the corresponding insert sleeve 310. The outer circumference of the insert sleeve 310 is also threaded with a locking bolt 314. One end of the locking bolt 314 extends into the insert sleeve 310 and abuts against the riser 32, making it difficult for the riser 32 to detach from the insert sleeve.

[0057] Reference Figure 2 and Figure 5 The cantilevered support scaffold also includes several horizontal bars 33 and longitudinal bars 34. The horizontal bars 33 are fastened to several horizontal uprights 32 by fasteners, and the longitudinal bars 34 are fastened to several longitudinal uprights 32 by fasteners.

[0058] In S2, the specific steps for erecting the formwork support scaffold 3 are as follows:

[0059] S2.1: Several I-beams 31 are sequentially fixed to the lower floor slab 1 using anchors;

[0060] S2.2: Insert the bottom end of the riser 32 into the corresponding plug sleeve 310 and rotate the locking bolt 314 until the locking bolt 314 is pressed against the outer periphery of the riser 32.

[0061] S2.3: Connect the horizontal bar 33 and the vertical bar 34 to the horizontal and vertical risers 32 respectively using fasteners.

[0062] S3: Erect the template components on top of the template support scaffold 3; the specific operating steps are as follows:

[0063] S3.1: Rotate the rotary nut 321 to adjust the limit block 323 to the appropriate height.

[0064] S3.1: The bottom formwork 2 is hoisted to the top of the limiting block 323 on the riser 32 by a tower crane, and the bottom formwork 2 is moved by outdoor construction personnel until the square rod 26 at the bottom of the bottom formwork 2 is embedded into the limiting groove 324 at the top of the limiting block 323.

[0065] S4: Apply release agent to the bottom mold 2, the serrated side mold and the sealing side mold 21;

[0066] S5: The main connecting plate 22 and the auxiliary connecting plate 23 of each V-shaped side mold unit are swung in sequence, so that the main connecting plate 22 and the auxiliary connecting plate 23 of each V-shaped side mold unit form a V shape at a specific angle, and the swaying of the main connecting plate 22 and the auxiliary connecting plate 23 is restricted by the locking member.

[0067] S6: Tie the reinforcing mesh on the bottom formwork 2; the reinforcing mesh should be tied and fixed to the pre-reserved reinforcing bar joints on the outside of the floor slab 1.

[0068] S7: Pour concrete into the cavity formed by the bottom mold 2, the serrated side molds, the two sets of sealing side molds 21, and the outer side of the floor slab 1. After the concrete is poured, cover it with a film and spray water for curing. During the concrete pouring process, any piles of concrete should be dispersed in a timely manner. At the same time, the condition of the supports and brackets should be checked in a timely manner, and any sinking, loosening, deformation, or horizontal displacement should be reinforced in a timely manner.

[0069] S8: Dismantle the formwork support scaffold 3 and formwork components. The specific operating steps are as follows: First dismantle the formwork support scaffold 3, then dismantle the formwork components. Before dismantling the formwork support scaffold 3, use a tower crane to lift both ends of the bottom formwork 2 before dismantling the formwork support scaffold 3. When dismantling the formwork components, first dismantle the sealing side formwork 21 and the serrated side formwork, and finally dismantle the bottom formwork 2. Before dismantling operations, relevant personnel should wear safety helmets, safety belts, and non-slip shoes. During the dismantling operation, construction personnel must not be located below the formwork components.

[0070] The implementation principle of this application is as follows: When erecting the formwork, according to the angle of each pointed protrusion 101 in the on-site construction drawings, the main connecting plate 22 and the secondary connecting plate 23 of each V-shaped formwork unit are swung sequentially until the main connecting plate 22 and the secondary connecting plate 23 of each V-shaped formwork unit are spliced ​​together to form a V shape at a specific angle. The pin 222 is rotated so that the limiting screw 24 can be perpendicular to the secondary connecting plate 23 along the axial direction. Simultaneously, the limiting screw 24 is rotated until the tightening nut 241 is pressed against the side of the secondary connecting plate 23. This achieves the limiting of the main connecting plate 22 and the secondary connecting plate 23. This makes the erection of the formwork simpler and more convenient, facilitating the pouring construction of the outer edge of the sawtooth floor slab.

[0071] 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 method for constructing a sawtooth outer edge of a cast-in-place floor slab, characterized in that: Includes the following steps: S1: Prefabricated template component, the template component includes a bottom mold (2), the bottom mold (2) has sealing side molds (21) on two short sides, and a serrated side mold on one long side, the serrated side mold is spliced ​​from several V-shaped side mold units, the V-shaped side mold unit includes a main connecting plate (22) and a secondary connecting plate (23), the two ends of the main connecting plate (22) and the secondary connecting plate (23) are respectively a fixed end and a movable end; the top of the secondary connecting plate (23) is provided with a sliding groove (231), and the top of the movable end of the main connecting plate (22) is provided with an extension plate (221). The end of the extension plate (221) away from the main connecting plate (22) is slidably hinged in the slide groove (231) by a pin (222); the main connecting plate (22) is also provided with a locking member to restrict the swing of the main connecting plate (22) and the auxiliary connecting plate (23); the fixed ends of the main connecting plate (22) and the auxiliary connecting plate (23) are both hinged to the bottom mold (2); the fixed ends of the main connecting plate (22) and the auxiliary connecting plate (23) are both set with arc surfaces, and the fixed ends of the main connecting plate (22) and the auxiliary connecting plate (23) of the adjacent V-shaped side mold units abut against each other; S2: Erect formwork support scaffolding (3) on the outside of the floor slab (1); S3: Erect the template components on top of the template support scaffold (3); S4: Apply release agent to the bottom mold (2), the serrated side mold and the sealing side mold (21); S5: Swing the main connecting plate (22) and the auxiliary connecting plate (23) of each V-shaped side mold unit in sequence, so that the main connecting plate (22) and the auxiliary connecting plate (23) of each V-shaped side mold unit form a V shape at a specific angle, and restrict the swing of the main connecting plate (22) and the auxiliary connecting plate (23) by locking the locking member; S6: Tie the steel mesh onto the bottom formwork (2); S7: Pour concrete into the mold cavity formed by the bottom mold (2), the serrated side mold, the two sets of sealing side molds (21) and the outside of the floor slab (1) and carry out curing; S8: Remove the formwork support scaffolding (3) and formwork components.

2. The construction method for a sawtooth outer edge of a cast-in-place floor slab according to claim 1, characterized in that: The bottom mold (2) has two sets of insertion slots (25) corresponding to the two sets of sealing side molds (21), and the two sets of sealing side molds (21) are respectively inserted into the corresponding insertion slots (25); the bottom of the fixed ends of the main connecting plate (22) and the auxiliary connecting plate (23) are both fixed with hinge shafts (27), and the bottom mold (2) has several hinge holes (20) corresponding to several hinge shafts (27), and the hinge shafts (27) are inserted into the corresponding hinge holes (20).

3. The construction method for a sawtooth outer edge of a cast-in-place floor slab according to claim 2, characterized in that: The locking component includes a limiting screw (24) threaded to the outer periphery of the pin (222). One end of the limiting screw (24) away from the pin (222) extends through the side of the auxiliary connecting plate (23) opposite to the main connecting plate (22). The side of the auxiliary connecting plate (23) opposite to the main connecting plate (22) has an elongated through groove (232) for the limiting screw (24) to slide. One end of the limiting screw (24) extending out of the auxiliary connecting plate (23) is coaxially fixed with a clamping nut (241).

4. The construction method for a sawtooth outer edge of a cast-in-place floor slab according to claim 1, characterized in that: The template support scaffold (3) includes several I-beams (31) fixed on the lower floor slab (1). One end of each I-beam (31) extends out of the lower floor slab (1) to form a cantilever end. Several vertical pipes (32) are vertically installed on the cantilever ends of the I-beams (31). The top of each vertical pipe (32) is provided with a top support for supporting the bottom formwork (2). The height of the top support is adjustable.

5. A construction method for a sawtooth outer edge of a cast-in-place floor slab according to claim 4, characterized in that: The bottom mold (2) has several square rods (26) fixed at its bottom; the top support includes a rotating nut (321) coaxially rotatably connected to the top of the riser (32), the rotating nut (321) is coaxially rotatably connected to a threaded rod (322), the top of the threaded rod (322) is rotatably connected to a limiting block (323), and the top of the limiting block (323) is provided with a limiting groove (324) for the square rods (26) to be embedded.

6. The method for constructing a sawtooth outer edge of a cast-in-place floor slab according to claim 3, characterized in that: The upper surface of the sub-connecting plate (23) is also provided with a scale.

7. A construction method for a sawtooth outer edge of a cast-in-place floor slab according to claim 5, characterized in that: The cantilever end of the I-beam (31) is provided with several plug sleeves (310) corresponding to several risers (32). The bottom ends of several risers (32) are inserted into the corresponding plug sleeves (310). Locking bolts (314) are threaded through the outer circumference of the plug sleeves (310). The locking bolts (314) abut against the outer circumference of the risers (32).

8. A construction method for a sawtooth outer edge of a cast-in-place floor slab according to claim 6, characterized in that: The extension plate (221) has a through hole, and the pin (222) is rotatably inserted into the through hole.

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