Fabricated plywood formwork system and construction method thereof

Abstract

The invention relates to an assembly type plywood formwork system and a construction method thereof.The formwork system comprises a plurality of prefabricated formworks arranged on the two sides of a concrete member and a connecting member connected between the two prefabricated formworks, each prefabricated formwork comprises plywood and keels, and the keels comprise middle keels and side keels; the connecting component comprises a middle panel, and a vertical plate, a transverse plate and a connecting plate which are sequentially connected to the two sides of the panel; the vertical plate, the transverse plate and the connecting plate form a groove space for accommodating the fixed edge keel; a plurality of opposite-pull screw holes are formed in the face plate, and the prefabricated formworks on the two sides of the concrete member are tied by penetrating opposite-pull screws through the opposite-pull screw holes of the two connecting members located on the different sides and oppositely arranged. Quick assembly of the prefabricated formworks can be completed through the connecting components, pulling can be completed by forming the opposite-pulling screw holes in the connecting components, holes do not need to be formed in the formworks, and the problems that the formwork turnover efficiency is low, construction is inconvenient, and slurry leaks are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering construction, and particularly relates to a prefabricated plywood formwork system and a construction method thereof. Background Art

[0002] A building formwork is a temporary support structure, which is fabricated according to design requirements to form concrete structures and components at specified positions and geometric dimensions, maintain their correct positions, and bear the self-weight of the building formwork and the external loads acting thereon. Plywood formwork has become the most main type of formwork in construction engineering due to its light self-weight, low cost, and strong flexibility. In the formwork construction technology of existing plywood formwork, it is necessary to install through-wall tie bolts at certain intervals longitudinally and transversely. The tie bolts usually directly pass through the formwork, so a large number of through-wall bolt holes will be opened on the plywood formwork, which is likely to cause slurry leakage when the formwork is recycled, reduce the quality of concrete construction, increase the damage rate of the formwork, reduce the turnover rate of the formwork, and increase the cost. At the same time, in the prior art, the sealing performance of the splicing joints of the on-site processed formwork is poor, and it is easy to leak slurry, affecting the quality of concrete forming. The methods of manual formwork matching, loose splicing of wooden formwork, and on-site drilling have the disadvantages of low construction efficiency, difficult to guarantee accuracy, and easy to burst slurry.

[0003] Therefore, in the existing plywood formwork construction technology, the setting of through-wall tie bolts and the construction method of on-site assembly and drilling of formwork have problems such as low construction efficiency, low turnover rate of formwork materials, and low construction quality, which need to be solved urgently. Summary of the Invention

[0004] The present invention provides a prefabricated plywood formwork system and a construction method thereof to solve the above technical problems.

[0005] To solve the above technical problems, the present invention provides a prefabricated plywood formwork system, including a plurality of prefabricated formworks arranged on both sides of a concrete member, and connecting members connected between two adjacent prefabricated formworks on the same side. The prefabricated formwork includes plywood and keels installed on the outer side of the plywood. The keels are divided into middle keels arranged in the middle of the plywood and side keels arranged at the left and right edges of the plywood. The connecting member includes a panel in the middle, and vertical plates, horizontal plates, and connecting plates sequentially connected to both sides of the panel. One ends of the two vertical plates are respectively vertically fixed to both ends of the panel, the other ends of the two vertical plates are respectively vertically fixed to one ends of the two horizontal plates, and the other ends of the two horizontal plates are respectively vertically fixed to one ends of a plurality of the connecting plates. The panel, the horizontal plate, and the vertical plate are strip-shaped steel plates with the same length as the length of the prefabricated formwork, and the connecting plate is a strip-shaped steel plate with a length less than the length of the connecting member. The vertical plate, the horizontal plate and the connecting plate form a groove space for accommodating and fixing the edge keel; a plurality of pairs of tie rod holes are provided on the panel, and the tie rods respectively pass through the tie rod holes of two connecting members arranged oppositely on different sides to tie the precast templates on both sides of the concrete member.

[0006] Preferably, a pin is provided on the inner side surface of the edge keel, and a fixing pin hole matching with the pin is provided on the connecting plate.

[0007] Preferably, the cross section of the fixing pin hole is L-shaped, one end of the L-shaped fixing pin hole is open, and the other end is closed.

[0008] Preferably, the inner side surfaces of two adjacent precast templates and the inner side surface of the panel of the connecting member therebetween are flush to form a concrete casting surface.

[0009] Preferably, a plurality of hollow holes are provided on the horizontal plate.

[0010] Preferably, the keel further includes end keels arranged at the upper and lower edges of the plywood, and the end keels are vertically connected to the ends of the middle keel and the edge keel.

[0011] Preferably, the width of the precast template is 450 - 915 mm.

[0012] Preferably, the tie rod holes on the panel are arranged at intervals along the length direction, and the interval is 450 - 500 mm; the width of the panel is 40 mm - 60 mm.

[0013] Preferably, the width of the connecting plate is 50 - 90 mm.

[0014] The present invention also provides a construction method of the prefabricated plywood formwork system as described above, including the following steps: Step 1: According to the drawings, manufacture the plywood, the middle keel and the edge keel, and assemble them to form a plurality of precast templates; Step 2: Design and produce the connecting members according to the drawings and the precast templates; Step 3: Arrange pins on the inner sides of the edge keels on both sides of the precast templates; Step 4: Place the edge keels into the corresponding groove spaces, insert the pins into the corresponding fixing pin holes, and connect the connecting plates of the connecting members and the edge keels of the precast templates; Step 5: Repeat the above steps to connect the connecting plate on the other side of the connecting member with another precast template to form a first integral formwork; Step 6: Repeat the above steps to connect another two precast templates by using another connecting member to form a second integral formwork; Step 7: Symmetrically arrange the first integral formwork and the second integral formwork according to the thickness of the concrete member, and pass and fix the tie bolts through the panel of the connecting member; Step 8: Repeat the above steps to complete the assembly installation of multiple precast formworks horizontally or vertically.

[0015] Compared with the prior art, the prefabricated plywood formwork system and its construction method provided by the present invention have the following advantages: 1. In the present invention, the connecting member integrally sets tie bolt holes through the panel, and sets the connecting part to connect and transfer force with the precast formwork, realizing that the plywood formwork material in the formwork engineering construction does not need to be provided with screw holes, solving the problems of low formwork turnover efficiency, inconvenient construction, slurry leakage during recycling caused by opening wall-piercing screw holes in the prior art, and the time-consuming and laborious problem of drilling screw holes on site, improving the formwork turnover rate, and improving the construction quality and efficiency; 2. The groove space formed by the vertical plate, horizontal plate and connecting plate of the connecting member in the present invention can hold and fix the edge keel of the precast formwork, so that the precast formwork is fixed and cannot move freely during pouring and stress, and can bear the lateral pressure during the concrete pouring process; 3. The connecting member in the present invention is connected between two precast formworks. By setting the horizontal plate, the tightness and stability of the formwork splicing can be ensured, and the concrete slurry leakage between the precast formworks and between the precast formworks and the connecting member can be prevented from overflowing; 4. The connecting plate is arranged on the connecting member in the present invention. The L-shaped fixing pin holes on the connecting plate are used for the assembly connection of the connecting member and the precast formwork. When removing the formwork, only move the connecting member upward (or in other directions), so that the pin is disengaged from the opening of the L-shaped fixing pin hole, and the pins on the edge keel do not need to be repeatedly nailed in and pulled out, which can save labor and time costs during precast turnover use; 5. Through the design of the precast formwork and the connecting member, the present invention realizes the factory prefabrication and connection of the plywood formwork and the keel, and can quickly realize the horizontal or vertical assembly on site, which can solve the problems of low construction efficiency and serious on-site dust pollution caused by the scattered assembly and sawing of the formwork on site. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the prefabricated plywood formwork system in a specific embodiment of the present invention; Figure 2 It is a schematic structural diagram of the precast formwork in a specific embodiment of the present invention; Figure 3 It is the front view of the connecting member in a specific embodiment of the present invention; Figure 4 It is the top view of the connecting member in a specific embodiment of the present invention; Figure 5Side view of the connecting member in a specific embodiment of the present invention; Figure 6 Schematic diagram of the horizontal prefabricated connection of the precast formwork in a specific embodiment of the present invention; Figure 7 Schematic diagram of the vertical prefabricated connection of the precast formwork in a specific embodiment of the present invention.

[0017] In the figure: 01 - concrete member; 10 - precast formwork, 11 - plywood, 12 - middle keel, 13 - side keel, 14 - end keel, 20 - connecting member, 21 - panel, 22 - vertical plate, 23 - horizontal plate, 24 - connecting plate, 25 - hollow hole, 30 - tie rod, 31 - tie rod hole, 40 - pin, 41 - fixed pin hole. Specific embodiment

[0018] In order to more elaborately describe the technical solutions of the above-mentioned invention, specific embodiments are listed below to prove the technical effects; it should be emphasized that these embodiments are used to illustrate the present invention and not to limit the scope of the present invention.

[0019] The prefabricated plywood formwork system provided by the present invention, as Figure 1 shown, includes a plurality of precast formworks 10 arranged on both sides of the concrete member 01, and connecting members 20 connected between two adjacent precast formworks 10 on the same side, wherein: Please refer to Figure 2 , the precast formwork 10 includes plywood 11 and keels installed on the outer side of the plywood 11. The keels are divided into middle keels 12 arranged in the middle of the plywood 11 and side keels 13 arranged on the left and right edges of the plywood 11. The keels are used to support the plywood 11; Please refer to Figures 3 to 5 , the connecting member 20 includes a panel 21 in the middle and vertical plates 22, horizontal plates 23 and connecting plates 24 sequentially connected to both sides of the panel 21. One ends of the two vertical plates 22 are respectively vertically fixed to both ends of the panel 21, the other ends of the two vertical plates 22 are respectively vertically fixed to one ends of the two horizontal plates 23, and the other ends of the two horizontal plates 23 are respectively vertically fixed to one ends of several connecting plates 24, forming a cross-section in the shape of " ". The vertical plate 22, the horizontal plate 23 and the connecting plate 24 form a groove space for accommodating and fixing the edge keel 13. The present invention utilizes the groove space to clamp and fix the edge keel 13 of the precast formwork 10, so that the precast formwork 10 is fixed and cannot move freely when being poured and stressed, and can withstand the lateral pressure during the concrete pouring process; a plurality of tie bolts holes 31 are provided on the panel 21, and the space formed by the panel 21 and the vertical plates 22 on both sides is used to arrange tie bolts 30. The tie bolts 30 respectively pass through the tie bolts holes 31 of two connecting members 20 arranged oppositely on different sides (opposite sides) to tie the precast formworks 10 on both sides of the concrete member 01.

[0020] In the present invention, the connecting member 20 integrally arranges the tie bolts holes 31 through the panel 21, and sets the connecting part to connect and transmit force with the precast formwork 10, realizing that the plywood formwork material in the formwork engineering construction does not need to open screw holes, solving the problems of low formwork turnover efficiency, inconvenient construction, leakage of slurry during recycling, and time-consuming and laborious on-site drilling of screw holes in the prior art, improving the formwork turnover rate, and improving the construction quality and efficiency.

[0021] In some embodiments, please refer with emphasis to Figures 1 to 5 , the width of the precast formwork 10 is 450 - 915 mm. The lengths of the panel 21, the horizontal plate 23 and the vertical plate 22 of the connecting member 20 are all the same as the length of the precast formwork 10, or the same as the floor height or length of the pouring member.

[0022] In some embodiments, please continue to refer to Figures 1 to 5 , the length of the panel 21 is the same as the length of the precast formwork 10, and the tie bolts holes 31 on the panel 21 are arranged at intervals along the length direction, with a spacing of 450 - 500 mm; the width of the panel 21 is 40 mm - 60 mm. The inner sides of two adjacent precast formworks 10 and the inner sides of the panel 21 of the connecting member 20 therebetween are flush, forming a concrete pouring surface, which is convenient for the concrete to be poured and formed.

[0023] In some embodiments, please refer with emphasis to Figure 1 , the height of the vertical plate 22 is the same as the thickness of the precast formwork 10, that is, the sum of the thicknesses of the plywood 11 and the edge keel 13. The vertical plate 22 is aligned and closely attached to the edge keel 13 of the precast formwork 10, which has the effect of strengthening the connecting member 20 and supports the force on the panel 21 during the concrete pouring.

[0024] In some embodiments, please refer with emphasis to Figure 1 and Figure 4, the width of the horizontal plate 23 is the same as the width of the upper edge keel 13 of the precast formwork 10, and the groove space can hold and fix three sides of the edge keel 13 of the precast formwork 10. A number of elongated hollow holes 25 are provided on the horizontal plate 23 to reduce the weight of the connecting member 20 and at the same time connect with the keel of the precast formwork 10. The horizontal plate 23 can ensure the sealing and stability of formwork splicing, and prevent the leakage of concrete slurry from the gaps between the precast formworks 10 and between the precast formworks 10 and the connecting member 20.

[0025] In some embodiments, please refer particularly to Figure 5 , the length of the connecting plate 24 is less than the length of the connecting member 20. In this embodiment, it is 50 - 100 mm, and the width is 50 - 90 mm. That is, the connecting plates 24 are fixed to the horizontal plate 23 at intervals. Specifically, the connecting plates 24 can be symmetrically or asymmetrically fixed to the horizontal plates 23 on both sides.

[0026] In some embodiments, please refer particularly to Figure 5 , a pin 40 is provided on the inner side surface of the edge keel 13, and a fixing pin hole 41 matching the pin 40 is provided on the connecting plate 24. The connecting plate 24 and the edge keel 13 are fixed by the pin 40 for force transmission between the connecting member 20 and the precast formwork 10. In this embodiment, the cross-section of the fixing pin hole 41 is L-shaped. One end of the L-shaped fixing pin hole 41 is open, and the other end is closed. The pin 40 can slide into the fixing pin hole 41 from the open end and be fixed in the fixing pin hole 41 by sliding. The L-shaped fixing pin holes 41 on the connecting plate 24 are used for the assembled connection between the connecting member 20 and the precast formwork 10. When removing the precast formwork 10, only need to move the connecting member 20 upward (or in some other direction), so that the pin 40 disengages from the open end of the L-shaped fixing pin hole 41, and the pins 40 on the edge keel 13 do not need to be repeatedly nailed in and pulled out, which can save labor and time costs during precast turnover use.

[0027] In some embodiments, please refer particularly to Figure 7 , the keel further includes end keels 14 provided at the upper and lower edge ends of the plywood 11. The end keels 14 are vertically connected to the ends of the middle keel 12 and the edge keel 13, and are used as the fixing parts of the connecting member 20 when vertically assembling the precast formwork 10.

[0028] The present invention also provides a construction method of the assembled plywood formwork system as described above, including the following steps: Step 1: According to the drawings, manufacture the plywood 11, the middle keel 12 and the edge keel 13 at the factory end and assemble them to form a number of precast formworks 10.

[0029] Step 2: Design and produce the connecting member 20 according to the drawings and the precast formwork 10.

[0030] Step 3: Arrange pins 40 at a certain interval inside the side keels 13 on both sides of the prefabricated formwork 10.

[0031] Step 4: Place the side keel 13 into the corresponding groove space, and slide the pin 40 into the fixing pin hole 41 from the opening of the corresponding fixing pin hole 41 to connect the connecting plate 24 of the connecting member 20 and the side keel 13 of the prefabricated formwork 10.

[0032] Step 5: Repeat the above steps to connect the connecting plate 24 on the other side of the connecting member 20 with another prefabricated formwork 10 to form a first integral formwork.

[0033] Step 6: Repeat the above steps and use another connecting member 20 to connect another two prefabricated formworks 10 to form a second integral formwork.

[0034] Step 7: Symmetrically arrange the first integral formwork and the second integral formwork according to the thickness of the concrete member 01, and pass and fix the tie rods 30 through the panel 21 of the connecting member 20.

[0035] Step 8: Repeat the above steps to complete the assembled installation of multiple prefabricated formworks horizontally or vertically. Please refer to Figure 6 and Figure 7 .

[0036] By designing the prefabricated formwork 10 and the connecting member 20 using the above method, the prefabrication and connection of the formwork and keels in the factory are realized, and the horizontal or vertical assembly can be quickly achieved on-site, which can solve the problems such as low construction efficiency and serious on-site dust pollution caused by the scattered assembly and sawing of the formwork on-site.

[0037] In summary, the prefabricated plywood formwork system and its construction method provided by the present invention. The formwork system includes a plurality of prefabricated formworks 10 arranged on both sides of a concrete member 01, and connecting members 20 connected between two adjacent prefabricated formworks 10 on the same side. The prefabricated formwork 10 includes a plywood 11 and keels installed on the outer side of the plywood 11. The keels are divided into middle keels 12 arranged in the middle of the plywood 11 and side keels 13 arranged at the left and right edges of the plywood 11. The connecting member 20 includes a middle panel 21 and vertical plates 22, horizontal plates 23 and connecting plates 24 sequentially connected to both sides of the panel 21. One ends of the two vertical plates 22 are respectively vertically fixed to both ends of the panel 21, the other ends of the two vertical plates 22 are respectively vertically fixed to one ends of the two horizontal plates 23, and the other ends of the two horizontal plates 23 are respectively vertically fixed to one ends of the two connecting plates 24. The vertical plates 22, horizontal plates 23 and connecting plates 24 form a groove space for accommodating and fixing the side keels 13. A plurality of tie rod holes 31 are provided on the panel 21. By passing tie rods 30 through the tie rod holes 31 of two connecting members 20 arranged oppositely on different sides, the prefabricated formworks 10 on both sides of the concrete member 01 are tied together. In the present invention, the connecting member 20 integrally arranges the tie rod holes 31 through the panel 21 and sets the connection part to connect and transfer force with the prefabricated formwork 10, realizing that the plywood formwork material does not need to be drilled with screw holes during the construction of the formwork project, solving the problems of low formwork turnover efficiency, inconvenient construction, leakage of mortar during recycling, and time-consuming and laborious on-site drilling of screw holes in the prior art, improving the formwork turnover rate, construction quality and efficiency.

[0038] Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. An assembled plywood formwork system, characterized in that, It includes a plurality of prefabricated templates arranged on both sides of a concrete member, and connecting members connected between two adjacent prefabricated templates on the same side. The prefabricated template includes a plywood board and keels installed on the outer side of the plywood board. The keels are divided into middle keels arranged in the middle of the plywood board and side keels arranged at the left and right edges of the plywood board. The connecting member includes a panel in the middle, and vertical plates, horizontal plates and connecting plates sequentially connected to both sides of the panel. One ends of the two vertical plates are respectively vertically fixed to both ends of the panel, the other ends of the two vertical plates are respectively vertically fixed to one ends of the two horizontal plates, and the other ends of the two horizontal plates are respectively vertically fixed to one ends of a plurality of the connecting plates; the panel, the horizontal plate and the vertical plate are strip-shaped steel plates with the same length as the length of the prefabricated template, and the connecting plate is a strip-shaped steel plate with a length less than the length of the connecting member. The vertical plate, the horizontal plate and the connecting plate form a groove space for accommodating and fixing the side keel; a plurality of tension bolts holes are provided on the panel, and the prefabricated templates on both sides of the concrete member are tied by passing tension bolts through the tension bolts holes of two connecting members arranged oppositely on different sides.

2. The fabricated plywood formwork system according to claim 1, wherein Pin holes are provided on the inner side surface of the side keel, and fixing pin holes matching the pin holes are arranged on the connecting plate.

3. The prefabricated plywood formwork system according to claim 2, wherein, The cross section of the fixing pin hole is L-shaped, one end of the L-shaped fixing pin hole is open, and the other end is closed.

4. The prefabricated plywood formwork system according to claim 1, characterized in that, The inner side surfaces of two adjacent prefabricated templates and the inner side surface of the panel of the connecting member therebetween are flush to form a concrete pouring surface.

5. The prefabricated plywood formwork system according to claim 1, characterized in that A plurality of hollow holes are provided on the horizontal plate.

6. The prefabricated plywood formwork system according to claim 1, wherein The keel further includes end keels arranged at the upper and lower edge ends of the plywood board, and the end keels are vertically connected to the ends of the middle keel and the side keel.

7. The prefabricated plywood formwork system according to claim 1, characterized in that, The width of the prefabricated template is 450 - 915 mm.

8. The prefabricated plywood formwork system according to claim 1, wherein, The tension bolts holes on the panel are arranged at intervals along the length direction, and the interval is 450 - 500 mm; the width of the panel is 40 mm - 60 mm.

9. The prefabricated plywood formwork system according to claim 1, wherein The width of the connecting plate is 50 - 90 mm.

10. A construction method of the prefabricated plywood formwork system according to any one of claims 1 to 9, characterized in that, It includes the following steps: Step 1: According to the drawings, manufacture the plywood board, the middle keel and the side keel, and assemble them to form a plurality of prefabricated templates. Step 2: Design and produce the connecting member according to the drawings and the prefabricated template. Step 3: Arrange pin holes on the inner sides of the side keels on both sides of the prefabricated template. Step 4: Place the side keel into the corresponding groove space, insert the pin into the corresponding fixing pin hole, and connect the connecting plate of the connecting member and the side keel of the prefabricated template. Step 5: Repeat the above steps, connect the connecting plate on the other side of the connecting member with another prefabricated template to form a first integral template. Step 6: Repeat the above steps, use another connecting member to connect another two prefabricated templates to form a second integral template. Step 7: Symmetrically arrange the first integral template and the second integral template according to the thickness of the concrete member, and pass and fix tension bolts through the panel of the connecting member. Step 8: Repeat the above steps to complete the assembly installation of a plurality of prefabricated templates horizontally or vertically.

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