Plywood formwork structure and construction method

Abstract

The invention relates to a plywood formwork structure and a construction method, and belongs to the technical field of building construction tools, the plywood formwork structure comprises a plywood body and a first connecting structure connected with the plywood body, and the plywood body comprises a plurality of gluing base plates and a second connecting structure connected with the gluing base plates; the first connecting structure comprises an opposite-pulling assembly for connecting two opposite plywood bodies, a connecting assembly for connecting two adjacent plywood bodies and reinforcing assemblies arranged on the plywood bodies at intervals in the height direction. The second connecting structure comprises a connecting base plate, connecting protruding plates are arranged on the two opposite sides of the connecting base plate, and connecting grooves connected with the connecting protruding plates in a sealed and inserted mode are formed in the two sides of the gluing base plate. The method has the effect.

Description

Technical Field

[0001] The present application relates to the technical field of building construction tools, and in particular to a plywood formwork structure and a construction method. Background Art

[0002] Plywood formwork is a common formwork for construction projects, which is mainly used to form the shape of components when pouring concrete and ensure the accurate position and shape of concrete. The plywood formwork structure includes plywood body, supporting structure and connectors.

[0003] The plywood body is the load-bearing plate that directly contacts the newly poured concrete. The supporting structure is a temporary structure that supports the panel, concrete and construction loads, ensuring that the building formwork structure is firmly combined without deformation or damage. The connector is the accessory that connects the plywood body and the supporting structure into a whole.

[0004] According to different architectural designs, the size of concrete walls in different projects is different. Therefore, the plywood formwork is assembled from multiple pieces of plywood to form a base plate, and then the base plate is surrounded by the plywood formwork. Plywood assembly is usually fixed by bolts and glue. After the concrete solidifies, the plywood needs to be removed. The above fixing method has the disadvantages of cumbersome disassembly and low efficiency. Summary of the invention

[0005] In order to facilitate the disassembly and assembly of adjacent plywood bodies and at the same time improve the connection strength of the plywood bodies, the present application provides.

[0006] The construction fixing structure of a plywood formwork provided in this application adopts the following technical solution: It comprises a plywood body and a first connection structure connecting the plywood body, the plywood body comprises a plurality of plywood base plates and a second connection structure connecting the plywood base plates, the first connection structure comprises a pulling component connecting two opposite plywood bodies, a connection component connecting two adjacent plywood bodies, and a reinforcing component arranged on the plywood body at intervals along the height direction; the second connection structure comprises a connection base plate, connecting convex plates are arranged on opposite sides of the connection base plate, and connecting grooves are provided on both sides of the plywood base plate to be sealed and plugged with the connecting convex plates.

[0007] By adopting the above technical scheme, before pouring the concrete wall, the connection strength of the two plywood bodies relative to each other is improved by the tensioning assembly of the first connection structure, the connection strength of the two adjacent plywood bodies is improved by the connection assembly, and finally the overall structural strength of the plywood formwork is further increased by the reinforcement assembly. The first connection structure has a simple structure, and it is convenient to disassemble and assemble the formwork after the concrete is solidified. The setting of the second connection structure can complete the assembly of the plywood body. Compared with the fixing method using bolts and glue in the prior art, the connection method of the present application is simple to operate and has high stability. At the same time, the recycling rate after dismantling is high, which reduces the construction cost.

[0008] Optionally, the tensioning assembly includes an inner rod, outer rods arranged on both sides of the inner rod, and conical screw sleeves for connecting the inner rod and the outer rod, threaded portions matching with the threads of the conical screw sleeve are arranged on both sides of the inner rod, and the end of the outer rod matches with the threads of the conical screw sleeve, and the spacing between two adjacent conical screw sleeves is equal to the thickness of two adjacent plywood bodies.

[0009] By adopting the above technical scheme, the structural composition of the tensioning assembly is disclosed. When the plywood bodies are assembled into a glued formwork, the connection between the plywood bodies on the opposite sides is strengthened by the tensioning assembly. The inner rod and the conical screw sleeve of the tensioning assembly are arranged in the glued formwork to withstand the lateral pressure of the concrete. The outer rod is located on the outer side of the plywood body, and while connecting the inner rod, it has a pressing effect on the strengthening assembly.

[0010] Optionally, the conical threaded sleeve includes a conical sealing sleeve and a threaded sleeve fixed in the conical sealing sleeve, the outer rod is provided with a fixing fastener for abutting the reinforcement assembly and a locking nut for locking the fixing fastener, and one end of the locking nut is provided with a sealing external stud for cooperating with the threaded sleeve.

[0011] By adopting the above technical scheme, the two ends of the threaded sleeve are respectively threadedly connected to the ends of the inner rod and the outer rod, so that the tension assembly remains stable during the concrete pouring process. Through the setting of the conical sealing sleeve, it can be conveniently disassembled and assembled after the concrete is poured, thereby improving the reuse rate. The setting of the locking nut can press and fix the fixing fastener on the reinforcement assembly. After the concrete solidifies, the conical sealing sleeve is removed, and then the sealing outer stud is inserted into the threaded sleeve, which has a sealing and blocking effect on the tension assembly in the concrete wall.

[0012] Optionally, the inner rod is provided with an expansion water stop plate, and a fixed water stop plate is provided between the conical sealing sleeve and the expansion water stop plate. A rotating rod is rotatably mounted on the fixed water stop plate, one end of the rotating rod is hinged to the outer side of the expansion water stop plate, and the other end is slidably arranged on the outer wall of the threaded sleeve, and the conical sealing sleeve is provided with a connecting hole for the rotating rod to pass through, and a section of the rotating rod that cooperates with the threaded sleeve is a telescopic rod structure; when concrete is poured in the plywood formwork, the expansion water stop plate contacts moisture and expands circumferentially toward the outside, and the rotating rod rotates with the fixed water stop plate as the axis, and is finally limited and fixed to the threaded sleeve.

[0013] By adopting the above technical solution, the setting of the expansion water stop plate and the fixed water stop plate can reduce the moisture entering the wall along the inner rod of the screw, thereby achieving a waterproof effect. The expansion water stop plate expands after encountering water, and achieves a double waterproof effect with the fixed water stop plate. The rotating rod can rotate synchronously with the expansion of the expansion water stop plate. When the expansion water stop plate completes expansion, one end of the rotating rod is fixed to the threaded sleeve, thereby improving the structural strength of the tension assembly within the tension assembly.

[0014] Optionally, a locking portion is provided at one end of the rotating rod away from the fixed water stop plate, the rotating rod is hingedly connected to the locking portion, the locking portion is limitedly slidably provided on the threaded sleeve, a limiting piece is provided on the locking portion toward the side of the threaded sleeve, the outer wall of the threaded sleeve has a clamping groove which is clamped with the limiting piece, and the limiting piece includes a limiting block and a limiting compression spring connected to the limiting block.

[0015] By adopting the above technical scheme, a method for fixing the end of the rotating rod and the threaded sleeve is disclosed. When the expansion water stop plate expands outward, the rotating rod is driven to rotate along the outer side of the fixed water stop plate as the axis, so that the rotating rod slides toward the fixed water stop plate at the locking part of the sliding conical sealing sleeve, and finally the limit member is snapped into the snap-in groove, thereby realizing the overall fixation of the rotating rod and improving the overall structural strength of the expansion water stop plate, the fixed water stop plate and the inner rod.

[0016] Optionally, the conical sealing sleeve comprises a sealing outer sleeve and a sealing inner sleeve, the sealing outer sleeve has a first strip hole for the rotating rod to pass through, one end of the first strip hole has a limiting groove for the rotating rod to be inserted into, the sealing outer sleeve is provided with a sealing telescopic member in the first strip hole, the sealing telescopic member moves synchronously with the rotating rod, the end surface of the end with a larger outer diameter in the sealing outer sleeve is provided with a sealing ring groove, and the sealing outer stud has a sealing ring that is sealed with the sealing ring groove; The sealing inner sleeve has a second strip hole for the rotating rod to pass through, and the second strip hole passes through the end of the conical sealing sleeve with a smaller outer diameter. The inner wall of the sealing outer stud is provided with a positioning protrusion, and the inner wall of the sealing outer sleeve is provided with a positioning groove adapted to the positioning protrusion.

[0017] By adopting the above technical solution, the rotating rod passes through the first strip hole and slides in the first strip hole. After the limiting piece of the rotating rod completes the limiting fixation, the rotating rod is snapped into the limiting slot, and the sealing between the sealing outer sleeve and the sealing inner sleeve is achieved through the sealing telescopic piece to prevent concrete from entering between the sealing inner sleeve and the threaded sleeve, so as to facilitate the removal of the sealing inner sleeve after the wall solidifies; the setting of the sealing ring groove on the sealing outer sleeve improves the sealing between the sealing outer stud and the sealing inner sleeve, reduces the entry of external moisture into the wall, and the positioning of the sealing outer stud is achieved under the action of the positioning protrusion and the positioning groove, ensuring that after the sealing outer stud and the sealing inner sleeve are fixed, the slurry outlet is located above the sealing outer stud. Optionally, the connection assembly includes a folding plate and a tensioning member, the folding plate is provided with a limiting protrusion on one side facing the plywood body, the limiting protrusion cooperates with the connecting groove, and the tensioning member includes a bidirectional screw sleeve, a clamping rod sleeved on both ends of the bidirectional screw sleeve and inserted into the folding plate, and a driving sleeve driving the two clamping rods to move in opposite or same directions; The reinforcement assembly includes reinforcement wood blocks arranged at intervals on the plywood body in the horizontal direction, and reinforcement rib tube groups arranged at intervals on the plywood body in the height direction. The reinforcement rib tube groups include two reinforcement rib tubes, and the fixing fasteners are fixed in cooperation with the reinforcement rib tube groups.

[0018] By adopting the above technical solution, the structural composition of the connection assembly and the reinforcement assembly is disclosed. The setting of the connection assembly realizes the connection of two adjacent plywood bodies, that is, the connection of two plywood bodies at the corner of the plywood formwork. One side of the folding plate is connected to the side wall of the plywood body through the limiting protrusion and the connecting groove, and the other side is connected through the limiting groove and the connecting protrusion plate. The connection is stable and easy to disassemble and assemble; the setting of the reinforcing wood square and the reinforcing rib tube group further enhances the overall horizontal and vertical bearing capacity of the plywood formwork.

[0019] Optionally, the glued substrate is further provided with a mounting and fixing plate mounted on the connecting substrate and the glued substrate, and the mounting and fixing plate and the connecting substrate are coaxially provided with a through hole for the outer rod to pass through.

[0020] By adopting the above technical solution, a fixing plate is set up to abut against the gluing substrate and the connecting substrate at the same time. After the tensioning assembly is fixed, the connection strength of the gluing substrate and the connecting substrate is further improved by setting up the fixing plate, thereby improving the stability of the gluing template.

[0021] Optionally, a heat-insulating cavity is provided on a side of the laminated substrate facing the concrete layer, and a heat-insulating material is filled in the heat-insulating cavity.

[0022] By adopting the above technical solution, the heat insulating material is filled in the heat insulating cavity of the glued base plate, so that the temperature of the concrete layer in the glued formwork can be maintained and the solidification time of the concrete layer can be shortened.

[0023] A construction method of a plywood formwork comprises the following steps: S1, draw the outer contour of the column wall according to the position of the structural steel column reinforcement; S2, according to the design size of the wall, select the plywood base plate, prefabricate and assemble the plywood body, complete the connection of the plywood body through the second connection structure, and fix the strengthening wood to the plywood body; S3, hoisting the assembled plywood body on the outer contour line of the column wall, and positioning the inner rod and the conical screw sleeve on the inner side of the plywood body, and connecting the plywood body into a plywood formwork through the first connecting structure; S4, install the reinforcing rib tube group, turn the locking nut to press the fixing fastener against the reinforcing rib tube group, and pour concrete into the glued formwork; S5, after the concrete solidifies, remove the glued formwork, take out the conical inner sleeve from the concrete wall, and then position the sealing outer stud of the locking nut and insert it into the threaded sleeve, and finally fill the inner hole of the locking nut with a sealing filler.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application uses the first connection structure and the second connection structure to respectively connect two adjacent plywood bodies and two adjacent plywood substrates. The connection method is simple to operate and has high structural strength. At the same time, the plywood substrates have a high recovery rate. 2. The present application can reduce the amount of water that enters the wall along the inner rod of the screw by setting the tension assembly, thereby achieving a waterproof effect. At the same time, the expansion water stop plate expands after encountering water, and achieves a double waterproof effect with the fixed water stop plate, thereby improving the structural strength of the wall; 3. The present application realizes the connection of two adjacent plywood bodies by setting a connecting component, and the connection is stable and easy to assemble and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a cross-sectional schematic diagram of the connection substrate and the mounting fixing plate of an embodiment of the present application.

[0027] Figure 3 It is a structural schematic diagram of the connecting substrate and the setting fixing plate of an embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of the structure of the tensioning assembly of an embodiment of the present application.

[0029] Figure 5 It is a cross-sectional view of the expansion water-stopping plate in the unexpanded state according to an embodiment of the present application.

[0030] Figure 6 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0031] Figure 7 It is a cross-sectional view of the sealing outer stud of the embodiment of the present application inserted into the threaded sleeve.

[0032] Figure 8 It is a schematic diagram of the structure of the connection component of an embodiment of the present application.

[0033] Explanation of the reference numerals: 1. plywood body; 11. plywood substrate; 111. heat-insulating cavity; 112. heat-insulating material; 113. connecting groove; 2. tension assembly; 21. inner rod; 211. threaded portion; 212. expansion water stop plate; 213. fixed water stop plate; 22. outer rod; 23. conical threaded sleeve; 231. conical sealing sleeve; 2311. sealing outer sleeve; 23111. first strip hole; 23112. limiting slot; 23113. sealing telescopic member; 23114. sealing ring groove; 23115. positioning groove; 2312. sealing inner sleeve; 23121. second strip hole; 232. threaded sleeve; 2321. snap-on groove; 24. fixing fastener; 241. arc groove; 25. locking nut; 251. sealing outer sleeve Stud; 2511, sealing ring; 2512, flow gap; 2513, injection through hole; 2514, positioning convex part; 26, rotating rod; 261, locking part; 262, mounting groove; 263, limiting member; 2631, limiting fixing surface; 3, connecting component; 31, folding plate; 311, limiting convex block; 32, tensioning member; 321, two-way screw sleeve; 322, clamping rod; 3221, limiting section; 323, driving sleeve; 4, strengthening component; 41, strengthening wood; 42, strengthening rib tube group; 5, connecting base plate; 51, connecting convex plate; 52, through hole; 6, setting fixing plate; 61, plug-in part; 62, first strap; 621, tightening driving member; 63, second strap; 64, tightening bolt; 65, guiding connecting rod. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] The following is combined with Figure 1-8 This application is described in further detail.

[0036] The embodiments of the present application disclose a plywood formwork structure and a construction method.

[0037] Reference Figure 1 and Figure 2 A plywood formwork structure includes a plywood body 1, four plywood bodies 1 form a plywood formwork, and adjacent plywood bodies 1 are connected and fixed by a first connection structure. Each plywood body 1 includes at least two plywood substrates 11, and adjacent plywood substrates 11 are spliced ​​and fixed by a second connection structure. The plywood substrates 11 have a heat-insulating cavity 111 facing the concrete wall, and the heat-insulating cavity 111 is filled with a heat-insulating material 112. In this embodiment, the heat-insulating material 112 is polystyrene foam.

[0038] The first connection structure includes a tensioning assembly 2 for connecting two opposite plywood bodies 1, a connection assembly 3 for connecting two adjacent plywood bodies 1, and a reinforcement assembly 4 for improving the plywood formwork. The second connection structure includes a connection base plate 5 and a fixing plate 6 for erection.

[0039] The connection substrate 5 is located between the two glued substrates 11. The two sides of the connection substrate 5 are integrally provided with connection protrusions 51. The radial cross section of the connection protrusions 51 is dovetail-shaped. Both side walls of the glued substrate 11 in the length direction have connection grooves 113 that are sealed and plugged with the connection protrusions 51. The side of the glued substrate 11 facing the concrete wall is flush with the surface of the connection substrate 5, and the side away from the concrete wall is staggered with the surface of the connection substrate 5, and the staggered radial cross section is concave toward the wall.

[0040] Reference Figure 2 and Figure 3 The mounting fixing plate 6 is used to fill the gap between the gluing substrate 11 and the connecting substrate 5, and the two ends thereof are integrally provided with a plug-in portion 61 for inserting into the gluing substrate 11. The mounting fixing plate 6 includes two separated first mounting plates 62 and second mounting plates 63, and the two mounting plates are connected by a tensioning bolt 64 and a guide connecting rod 65 arranged on both sides of the tensioning bolt 64. Among them, a tensioning driving member 621 for driving the tensioning bolt 64 to rotate is arranged on the first mounting plate 62, and the tensioning driving member 621 can be an electric or manual handle, and in this embodiment, it is a manual handle, and the transmission is realized by gears.

[0041] Reference Figure 3 , Figure 4 and Figure 5 The tension assembly 2 includes an inner rod 21 located in the plywood formwork, an outer rod 22 located outside the plywood formwork, and a conical screw sleeve 23 for connecting the inner rod 21 and the outer rod 22. The conical screw sleeve 23 includes a conical sealing sleeve 231 and a threaded sleeve 232, and the threaded sleeve 232 is fixed in the conical sealing sleeve 231. The outer conical surface of the conical sealing sleeve 231 is inclined inward toward the middle of the inner rod 21, and the distance between the two conical sealing sleeves 231 is the thickness of the concrete wall. The two ends of the inner rod 21 are provided with threaded portions 211 that cooperate with the threaded sleeve 232, and the end of the outer rod 22 is also threadedly matched with the threaded sleeve 232. Among them, through holes 52 for the outer rod 22 to pass through are evenly spaced along the height direction on the connecting base plate 5.

[0042] The outer rod 22 is sleeved with a fixing fastener 24 for abutting against the reinforcing assembly 4 and a locking nut 25 for locking the fixing fastener 24. The locking nut 25 is T-shaped, and one end of the locking nut 25 has a sealing outer stud 251 that is threadedly matched with the threaded sleeve 232. An expansion water stop sheet 212 is fixedly installed in the middle of the inner rod 21. The expansion water stop sheet 212 as a whole includes a steel sheet welded to the inner rod 21 on the inner side and an expansion material circumferentially arranged on the outer side of the steel sheet. The expansion material has the characteristic of expanding when exposed to water, and the expansion direction is the radial direction of the inner rod.

[0043] The inner rod 21 is also welded with a fixed water stop sheet 213 between the conical sealing sleeve 231 and the expansion water stop sheet 212. A plurality of rotating rods 26 are installed at intervals on the outer peripheral side of the fixed water stop sheet 213. One end of the rotating rod 26 is hinged to the outer edge of the expansion water stop sheet 212, and the other end is limitedly slidably arranged on the outer wall of the threaded sleeve 232. The conical sealing sleeve 231 has a connecting hole for the rotating rod 26 to pass through.

[0044] Reference Figure 5 and Figure 6Specifically, the conical sealing sleeve 231 includes a sealing outer sleeve 2311 and a sealing inner sleeve 2312, and the sealing outer sleeve 2311 and the sealing inner sleeve 2312 are plugged and fixed. The connecting hole includes a first strip hole 23111 on the sealing outer sleeve 2311, and a second strip hole 23121 on the sealing inner sleeve 2312. The second strip hole 23121 passes through the end of the conical sealing sleeve 231 with a smaller outer diameter.

[0045] The rotating rod 26 is hingedly provided with a locking portion 261 at one end away from the fixed water stop sheet 213. The locking portion 261 is limited and slidable on the outer wall of the threaded sleeve 232. The locking portion 261 has a mounting groove 262 on the side facing the threaded sleeve 232, and a limiting member 263 is provided in the mounting groove 262. The limiting member 263 includes a limiting compression spring connected to the bottom wall of the mounting groove 262 and a limiting block connected to the limiting compression spring. The limiting block has a limiting fixing surface 2631 on the side away from the fixed water stop sheet 213. The outer wall of the threaded sleeve 232 has a snap-in groove 2321 for the limiting block to be inserted, and the snap-in groove 2321 has an abutting surface that cooperates with the limiting fixing surface 2631. Among them, the two ends of the rotating rod 26 are telescopic rod structures, that is, the two ends of the rotating rod 26 are slidably installed with inner sliding rods.

[0046] When concrete is not poured, the locking part 261 is located on the side of the clamping groove 2321 away from the fixed water stop 213, and the limiter 263 is in the installation groove 262 through the limiter compression spring; when concrete is poured, the expansion water stop 212 expands when it encounters water, so that the rotating rod 26 rotates around the fixed water stop 213 as the axis, wherein the end of the rotating rod 26 connected to the expansion water stop 212 extends radially outward along the inner rod 21, and the telescopic rod of this part is elongated; the sliding end of the rotating rod 26 and the threaded sleeve 232 moves toward the fixed water stop 213 until the limiter 263 is clamped into the clamping groove 2321, and the telescopic rod of this part is shortened, and the sealing inner sleeve 2312 is taken out after the concrete wall solidifies. The two water stop sheets have a double water stopping effect, which reduces the probability of external moisture entering the interior of the wall during the solidification and maintenance of the concrete wall.

[0047] The sealing sleeve 2311 has a limiting slot 23112 for the rotating rod 26 to be inserted into at the end of the first strip hole 23111 facing the smaller outer diameter, and the inner diameter of the limiting slot 23112 is adapted to the rotating rod 26. The sealing sleeve 2311 is also provided with a sealing telescopic member 23113 at the first strip hole 23111, one end of the sealing telescopic member 23113 is fixedly connected to the end of the first strip hole 23111, and the other end is fixedly connected to the rotating rod 26. The sealing telescopic member 23113 is a sealing rubber bellows, and when the rotating rod 26 is inserted into the limiting slot 23112, the sealing telescopic member 23113 seals the first strip hole 23111.

[0048] Combination Figure 7A sealing ring groove 23114 is provided on the end face of the sealing sleeve 2311 on the side with a larger outer diameter, and a sealing ring 2511 is provided at the end of the sealing outer stud 251 to match the sealing ring groove 23114. A flow gap 2512 exists between the outer wall of the threaded sleeve 232 and the sealing sleeve 2311, and the inner hole of the threaded sleeve 232 is connected to the flow gap 2512. Two injection through holes 2513 connected to the flow gap 2512 are symmetrically provided on the end face of the sealing outer stud 251 along the central axis, so that when the sealing outer stud 251 is inserted into the threaded sleeve 232, the inner hole of the sealing outer stud 251 is closed, and then one of the injection through holes 2513 is filled with sealing material, and after the inner hole of the threaded sleeve 232 and the flow gap 2512 are filled, until the other injection through hole 2513 of the sealing material overflows, and finally the two through holes are sealed and blocked.

[0049] In order to ensure that the two injection holes 2513 are always located one at the top and the other at the bottom, the inner wall of the sealing sleeve 2311 has a positioning protrusion 23115 along the axial direction, and the inner wall of the sealing outer stud 251 has a positioning protrusion 2514 adapted to the positioning protrusion 23115 to ensure the positioning of the sealing outer stud 251.

[0050] Reference Figure 2 and Figure 8 The connection assembly 3 includes a folding plate 31 and a tensioning member 32. The folding plate 31 is arranged between two adjacent plywood bodies 1, and the cross section of the folding plate 31 is L-shaped. The folding plate 31 is provided with limiting protrusions 311 on both side end surfaces facing the plywood body 1. The limiting protrusions 311 are sealed and matched with the connection grooves 113.

[0051] The tensioning member 32 is arranged on the side of the folding plate 31 facing away from the plywood body 1. The tensioning member 32 includes a bidirectional screw sleeve 321, a clamping rod 322 threadedly mounted on both ends of the bidirectional screw sleeve 321 and inserted into the inner side of the folding plate 31, and a driving sleeve 323 driving the two clamping rods 322 to move in opposite or same directions. The two sides of the bidirectional screw sleeve 321 have threaded sections in opposite directions, and the ends of the clamping rod 322 are integrally provided with a limiting section 3221 with a rectangular cross section, which passes through the folding plate 31 and abuts against the side of the plywood body 1. The driving sleeve 323 is fixed to the outer side wall of the bidirectional screw sleeve 321, so that the construction personnel can rotate the bidirectional screw sleeve 321.

[0052] Reference Figure 1 and Figure 2 The reinforcement assembly 4 includes a reinforcement wood square 41 arranged at intervals on the plywood body 1 in the horizontal direction and a reinforcement rib tube group 42 arranged at intervals in the height direction. The reinforcement rib tube group 42 includes two reinforcement steel rib tubes arranged at intervals. The fixing fastener 24 sleeved on the outer rod 22 has an arc groove 241 pressed against the reinforcement steel rib tube.

[0053] The present application embodiment provides a construction method for a plywood formwork, comprising the following steps: S1, draw the outer contour of the column wall according to the position of the structural steel column reinforcement; S2, according to the design size of the wall, select the plywood base plate 11 and prefabricate and assemble the plywood body 1; insert the connecting base plate 5 between two adjacent plywood base plates 11, and then insert the erection fixing plate 6 into the staggered gap, tighten the two adjacent plywood base plates 11 by tightening the driving member 621, and fix the reinforcing wood 41 on the plywood body 1; S3, hoist the assembled plywood body 1 on the outer contour line of the column wall, and position the inner rod 21 and the conical screw sleeve 23 on the inner side of the plywood body 1. Through the first connecting structure, the plywood body 1 is connected to form a plywood template, and the tensioning member 32 further tightens the two adjacent plywood bodies 1; S4, install the reinforcing rib tube group 42, rotate the locking nut 25 to press the fixing fastener 24 against the reinforcing rib tube group 42, and pour concrete into the glued formwork; S5. After the concrete solidifies, remove the glued formwork, take out the sealing inner sleeve 2312 from the concrete wall, and then position the sealing outer stud 251 and insert it into the threaded sleeve 232. Then, inject the sealing filler from the injection hole 2513 at the bottom until the inner hole and the filling gap of the sealing outer stud 251 are filled. After the sealing filler flows out from the injection hole 2513 at the top, the through hole on the end face of the sealing outer stud 251 is sealed.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plywood formwork structure, characterized in that: The invention comprises a plywood body (1) and a first connection structure for connecting the plywood body (1); the plywood body (1) comprises a plurality of plywood base plates (11) and a second connection structure for connecting the plywood base plates (11); the first connection structure comprises a tensioning component (2) for connecting two opposing plywood bodies (1), a connection component (3) for connecting two adjacent plywood bodies (1), and a reinforcing component (4) arranged along a spacing on the plywood body (1); the second connection structure comprises a connection base plate (5); connection convex plates (51) are arranged on opposite sides of the connection base plate (5); and connection grooves (113) are provided on both sides of the plywood base plate (11) for sealing and plugging with the connection convex plates (51).

2. A plywood formwork structure according to claim 1, characterized in that: The tensioning assembly (2) comprises an inner rod (21), outer rods (22) arranged on both sides of the inner rod (21), and a conical screw sleeve (23) for connecting the inner rod (21) and the outer rod (22), wherein both sides of the inner rod (21) are provided with threaded portions (211) that are threadedly matched with the conical screw sleeve (23), and the end of the outer rod (22) is threadedly matched with the conical screw sleeve (23), and the spacing between two adjacent conical screw sleeves (23) is equal to the thickness of two adjacent plywood bodies (1).

3. A plywood formwork structure according to claim 2, characterized in that: The conical threaded sleeve (23) comprises a conical sealing sleeve (231) and a threaded sleeve (232) fixed in the conical sealing sleeve (231); the outer rod (22) is provided with a fixing fastener (24) for abutting against the reinforcing component (4) and a locking nut (25) for locking the fixing fastener (24); one end of the locking nut (25) is provided with a sealing outer stud (251) for cooperating with the threaded sleeve (232).

4. A plywood formwork structure according to claim 3, characterized in that: The inner rod (21) is provided with an expansion water stop sheet (212). The inner rod (21) is provided with a fixed water stop sheet (213) between the conical sealing sleeve (231) and the expansion water stop sheet (212). A rotating rod (26) is rotatably mounted on the fixed water stop sheet (213). Both ends of the rotating rod (26) are telescopic rod structures. One end of the rotating rod (26) is hinged to the outside of the expansion water stop sheet (212), and the other end is slidably arranged on the outer wall of the threaded sleeve (232). The conical sealing sleeve (231) is provided with a connecting hole for the rotating rod (26) to pass through. When concrete is poured in the plywood formwork, the expansion water stop sheet (212) contacts water and expands circumferentially toward the outside. The rotating rod (26) rotates with the fixed water stop sheet (213) as the axis, and is finally fixed to the threaded sleeve (232) in a limited position.

5. A plywood formwork structure according to claim 4, characterized in that: A locking portion (261) is provided at one end of the rotating rod (26) away from the fixed water stop plate (213); the rotating rod (26) is hingedly connected to the locking portion (261); the locking portion (261) is limitedly slidably provided on the threaded sleeve (232); a limiting member (263) is provided on the side of the locking portion (261) facing the threaded sleeve (232); an outer wall of the threaded sleeve (232) has a clamping groove (2321) clamped with the limiting member (263); and the limiting member (263) comprises a limiting block and a limiting compression spring connected to the limiting block.

6. A plywood formwork structure according to claim 4, characterized in that: The conical sealing sleeve (231) comprises a sealing outer sleeve (2311) and a sealing inner sleeve (2312); the sealing outer sleeve (2311) has a first strip hole (23111) for the rotating rod (26) to pass through; one end of the first strip hole (23111) has a limit groove (23112) for the rotating rod (26) to be inserted into; the sealing outer sleeve (2311) is provided with a sealing telescopic member (23113) in the first strip hole (23111); the sealing telescopic member (23113) moves synchronously with the rotating rod (26); a sealing ring groove (23114) is provided on the end surface of the end with a larger outer diameter in the sealing outer sleeve (2311); and the sealing outer stud (251) has a sealing ring (2511) that is sealingly matched with the sealing ring groove (23114); The sealing inner sleeve (2312) has a second strip hole (23121) for the rotating rod (26) to pass through, and the second strip hole (23121) passes through the end of the conical sealing sleeve (231) with a smaller outer diameter. The inner wall of the sealing outer stud (251) is provided with a positioning protrusion (2514), and the inner wall of the sealing outer sleeve (2311) is provided with a positioning groove (23115) adapted to the positioning protrusion (2514).

7. The plywood formwork structure according to claim 3, characterized in that: The connecting assembly (3) comprises a folding plate (31) and a tensioning member (32); the folding plate (31) is provided with a limiting protrusion (311) on one side facing the plywood body (1); the limiting protrusion (311) cooperates with the connecting groove (113); the tensioning member (32) comprises a bidirectional screw sleeve (321), a pressing rod (322) arranged in the bidirectional screw sleeve (321) and inserted into opposite sides of the folding plate (31); and a driving sleeve (323) for driving the two pressing rods (322) to move in opposite or same directions; The reinforcing assembly (4) comprises reinforcing wood strips (41) arranged at intervals on the plywood body (1) in a horizontal direction, and reinforcing rib tube groups (42) arranged at intervals on the plywood body (1) in a height direction, wherein the reinforcing rib tube group (42) comprises two reinforcing rib tubes, and the fixing fastener (24) is fixedly coupled with the reinforcing rib tube group (42).

8. The plywood formwork structure according to claim 1, characterized in that: The glued substrate (11) is further provided with a mounting fixing plate (6) mounted on the connecting substrate (5) and the glued substrate (11); the mounting fixing plate (6) and the connecting substrate (5) are coaxially provided with a through hole (52) for the outer rod (22) to pass through.

9. The plywood formwork structure according to claim 1, characterized in that: A heat-insulating cavity (111) is provided on the side of the glued substrate (11) facing the concrete wall, and a heat-insulating material (112) is filled in the heat-insulating cavity (111).

10. A method for constructing a plywood formwork, using the plywood formwork structure according to any one of claims 1 to 9, characterized in that: The following steps are included: S1, draw the outer contour of the column wall according to the position of the structural steel column reinforcement; S2, selecting a plywood base plate (11) according to the design dimensions of the wall, completing the splicing of the plywood body (1) through a second connection structure, and arranging reinforcing wood squares (41) on the surface of the plywood body (1) after the splicing; S3, hoisting the assembled plywood body (1) on the outer contour line of the column wall, and positioning the inner rod (21) and the conical screw sleeve (23) on the inner side of the plywood body (1), and connecting the plywood body (1) to form a plywood formwork through the first connection structure; S4, installing the reinforcing rib tube group (42), rotating the locking nut (25) to press the fixing fastener (24) against the reinforcing rib tube group (42), and pouring concrete into the glued formwork; S5, after the concrete solidifies, the glued formwork is removed, the sealing inner sleeve (2312) is taken out from the concrete wall, and then the sealing outer stud (251) of the locking nut (25) is positioned and inserted into the threaded sleeve (232), and finally the inner hole of the locking nut (25) is filled with a sealing filler.

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