A little on the wall formwork structure and its construction method

Abstract

The application relates to the technical field of building construction formwork engineering, in particular to a little-pull wall formwork structure and a construction method thereof. The little-pull wall formwork structure comprises wood formworks, vertical battens, horizontal battens and prestressed beams arranged in sequence. The wood formworks are arranged on both sides of a wall to be poured. A plurality of vertical battens are fixed on the wood formworks at intervals. A plurality of horizontal battens are arranged at intervals along the length direction of the vertical battens. A plurality of prestressed beams are arranged at intervals along the length direction of the horizontal battens. The length direction of the vertical battens is parallel to the length direction of the prestressed beams. A pull screw is detachably arranged between the end portions of the prestressed beams on both sides of the wall to be poured. Connecting assemblies for fixation are arranged between the vertical battens and the horizontal battens and between the horizontal battens and the prestressed beams. A reverse bending piece is arranged on the prestressed beam, and the reverse bending piece is used for applying a prestress to the prestressed beam, which is opposite to the bending of the wood formwork. The application has the effects of simple and convenient installation and high pouring quality.

Description

Technical Field

[0001] This application relates to the field of building construction formwork engineering technology, and in particular to a formwork structure for a wall with few tie rods and its construction method. Background Technology

[0002] In traditional cast-in-place concrete wall formwork construction, in order to resist the huge lateral pressure generated during concrete pouring (excessive lateral pressure can easily cause formwork bulging, and in severe cases, formwork bursting), it is usually necessary to install a large number of tie rods (through-wall bolts) on the formwork. The spacing between adjacent tie rods is generally 400mm~600mm, and the higher the wall, the more tie rod layers there are.

[0003] However, the large number of tie rods not only increases the workload of installation and dismantling, but also leaves numerous holes on the wall surface, making later sealing time-consuming and laborious, and greatly increasing the risk of wall leakage. Ordinary steel or wooden formwork systems have low rigidity, thus requiring dense back bracing and supports to improve the rigidity of the formwork system. However, dense back bracing and supports require manual installation, which easily leads to high construction costs. Existing technologies also include some high-rigidity metal formwork, but these are often structurally heavy and have poor adaptability to walls of different heights and dimensions, thus having shortcomings. Summary of the Invention

[0004] To address the problems existing in the construction of traditional concrete wall formwork, this application provides a wall formwork structure with fewer tie rods and its construction method.

[0005] Firstly, this application provides a wall formwork structure with fewer tie rods, which adopts the following technical solution: A low-tie-coupler wall formwork structure includes wooden formwork, vertical ribs, horizontal ribs, and prestressed beams arranged sequentially. The wooden formwork is arranged on both sides of the wall to be poured. Multiple vertical ribs are fixed at intervals on the wooden formwork. Multiple horizontal ribs are arranged at intervals along the length of the vertical ribs. Multiple prestressed beams are arranged at intervals along the length of the horizontal ribs. The length direction of the vertical ribs is parallel to the length direction of the prestressed beams. Tie rods are detachably installed between the ends of the prestressed beams on both sides of the wall to be poured. Connection components for fixing are provided between the vertical ribs and the horizontal ribs, and between the horizontal ribs and the prestressed beams. Anti-bending members are provided on the prestressed beams, which are used to apply a prestress that bends away from the wooden formwork.

[0006] By adopting the above technical solution, workers first select suitable wooden formwork according to the size of the wall to be poured, then fix the vertical ribs to the wooden formwork, and then fix the vertical ribs, horizontal ribs and prestressed beams together through connecting components. After that, holes are opened on one side of the wooden formwork for tie rods to pass through. Then, the horizontal ribs are lifted by hoisting equipment, and finally the two sets of wooden formwork are fixed together by tie rods. The anti-bending component will apply a prestress to the prestressed beam that bends away from the wooden formwork. When workers pour concrete between the two wooden formworks, the huge lateral pressure of the concrete on the wooden formwork will be offset by the prestress on the prestressed beam, thereby reducing the possibility of formwork bulging, reducing the number of tie rods used, and reducing the possibility of concrete leakage in the later stage.

[0007] Optionally, the cross sections of the vertical rib, the horizontal rib, and the prestressed beam are all I-shaped. Several weight-reducing holes are provided on the prestressed beam and the vertical rib. The weight-reducing holes on the prestressed beam are evenly arranged along the length of the prestressed beam, and the weight-reducing holes on the vertical rib are evenly arranged along the length of the vertical rib.

[0008] By adopting the above technical solution, the weight of the overall assembly is greatly reduced while ensuring structural strength, which helps to reduce the difficulty of subsequent hoisting.

[0009] Optionally, the connecting assembly includes clamps arranged on both sides of the vertical rib along its length and on both sides of the prestressed beam along its length. Ear plates are provided on the clamps, and vertical waist holes are formed on the ear plates. Fixing screws are threaded through the vertical waist holes of the ear plates, passing through the weight-reducing holes. A fixing nut is threaded to the end of the fixing screw, abutting against the ear plates. An anchor is provided on the clamps, used to fix the clamps to the horizontal rib.

[0010] Optionally, the anchor includes a lower hook plate disposed at one end of the clamping plate, and an upper hook plate slidably disposed at the other end of the clamping plate. Both the lower hook plate and the upper hook plate have L-shaped cross sections. The clamping plate has a clearance groove for the upper hook plate to slide. A tensioning screw is threadedly connected to the clamping plate. The tensioning screw is rotatably disposed on the upper hook plate. The upper hook plate presses the transverse rib against the lower hook plate.

[0011] By adopting the above technical solution, in the process of connecting and fixing the vertical and horizontal ribs, the worker first places the clamping plate on the horizontal ribs on both sides of the vertical rib, then tightens the tensioning screw. The tensioning screw rotates and pushes the upper hook plate close to the lower hook plate, so that the upper hook plate and the lower hook plate hook onto the two sides of the I-shaped horizontal rib. Then, the worker passes the fixing screw through the vertical waist hole on the ear plate, the weight reduction hole on the vertical rib, and the vertical waist hole on the ear plate in sequence, and finally tightens the fixing nut, so that the vertical rib and the horizontal rib are fixedly connected together. Similarly, the horizontal rib and the prestressed beam are fixedly connected together. This method is reliable and easy to operate, which greatly reduces the difficulty of assembly for workers.

[0012] Optionally, the prestressed beam is arranged vertically, the tie rod at the bottom of the prestressed beam passes through the wooden formwork, and the tie rod at the top of the prestressed beam is positioned higher than the top of the wooden formwork.

[0013] By adopting the above technical solution, the number of holes left in the poured concrete is reduced, thereby further reducing the possibility of leakage in the concrete wall.

[0014] Optionally, the inverted member includes mounting plates disposed at both ends of the prestressed beam, a steel cable is disposed between the two mounting plates, a stress frame is arranged on the side of the prestressed beam facing away from the wooden template, a stress wheel is rotatably disposed on the stress frame, and the steel cable passes around the stress wheel.

[0015] By adopting the above technical solution, the tension of the steel cable itself will give the prestressed beam a prestress that bends away from the wooden formwork. During the concrete pouring process, since the tie rods hold the two ends of the prestressed beam, the poured concrete will cause the middle of the wooden formwork to expand outward. That is, the concrete will cause the middle of the wooden formwork to have outward lateral pressure. The lateral pressure will cause the prestressed beam to tend to bend towards the wooden formwork. At this time, the prestress generated by the steel cable on the prestressed beam will cancel out the lateral pressure, thereby reducing the influence of the lateral pressure and improving the quality of the pouring.

[0016] Optionally, two slide blocks are provided in the middle of the prestressed beam, and two stress frames are arranged in the middle of the prestressed beam. The slide blocks and stress frames correspond one-to-one. A slider is slidably arranged on the slide block, and the stress frame is arranged on the slider. A connecting screw is provided on the slider. A turnbuckle connecting cylinder is arranged between the two sliders. The connecting screw is threaded to the end of the turnbuckle connecting cylinder. The two connecting screws are symmetrically arranged about the turnbuckle connecting cylinder. An anti-loosening nut is threaded on the connecting screw and abuts against the turnbuckle connecting cylinder.

[0017] By adopting the above technical solution, workers can rotate the turnbuckle in the forward direction to separate the two stress frames, thereby continuously tightening the steel cable and applying appropriate prestress to the prestressed beam. Afterwards, tightening the anti-loosening nut prevents the turnbuckle from rotating in the reverse direction. Once the concrete wall has been poured and solidified, workers can rotate the turnbuckle in the reverse direction to release the steel cable from the taut state. This reduces the difficulty of steel cable installation and automatically adjusts the magnitude of prestress on the prestressed beam, thereby reducing the problem of metal fatigue failure caused by the steel cable under prolonged tension.

[0018] Secondly, this application provides a construction method for a wall formwork structure with fewer tie rods, employing the following technical solution: A construction method for a wall formwork structure with fewer tie rods includes the following steps: S1. The worker first selects the appropriate size of the wooden formwork according to the size of the concrete wall to be poured, and then fixes multiple vertical ribs at intervals on the wooden formwork. S2. The plurality of horizontal ribs are fixed to the vertical ribs at intervals by means of a connecting component; S3. Fix multiple prestressed beams at intervals to the crossbeams using connecting components, then open holes on one side of the bottom of the wooden formwork for the tie rods to pass through, and then lift the crossbeams using hoisting equipment; S4. Fix the ends of the prestressed beams on both sides of the wall to be poured using the tie rods, so that the two wooden formworks maintain a suitable distance. S5. Apply prestress to the prestressed beam through the anti-curving member, so that the prestressed beam tends to bend away from the wooden template.

[0019] By adopting the above technical solution and using the assembly method, it can adapt to the pouring of most concrete walls. At the same time, while ensuring the pouring strength, it greatly reduces the number of tie rods used, thereby reducing the possibility of leakage in the concrete wall later.

[0020] In summary, this application includes at least one of the following beneficial technical effects: Workers first select suitable wooden formwork based on the dimensions of the wall to be poured. Then, they fix the vertical ribs to the wooden formwork. Next, they connect the vertical ribs, horizontal ribs, and prestressed beams together using connecting components. After that, holes are made on one side of the wooden formwork for tie rods to pass through. Then, the horizontal ribs are lifted using hoisting equipment. Finally, the two sets of wooden formwork are fixed together using tie rods. The anti-bending component applies a prestress to the prestressed beam that bends away from the wooden formwork. When workers pour concrete between the two wooden formworks, the huge lateral pressure of the concrete on the wooden formwork is offset by the prestress on the prestressed beam, thereby reducing the possibility of formwork bulging. At the same time, it reduces the number of tie rods used and lowers the possibility of concrete leakage later. During the process of connecting and fixing the vertical and horizontal ribs, the worker first places the clamping plate on the horizontal ribs on both sides of the vertical rib, then tightens the tensioning screw. The tensioning screw rotates and pushes the upper hook plate closer to the lower hook plate, so that the upper hook plate and the lower hook plate hook onto the two sides of the I-shaped horizontal rib. Then, the worker passes the fixing screw through the vertical waist hole on the ear plate, the weight reduction hole on the vertical rib, and the vertical waist hole on the ear plate in sequence, and finally tightens the fixing nut, so that the vertical rib and the horizontal rib are fixedly connected together. Similarly, the horizontal rib and the prestressed beam are fixedly connected together. This method is reliable and easy to operate, which greatly reduces the difficulty of assembly for workers. The tension of the steel cable itself causes the prestressed beam to bend away from the wooden formwork. During the concrete pouring process, the tie rods hold the two ends of the prestressed beam in place, causing the middle of the wooden formwork to expand outward. In other words, the concrete creates an outward lateral pressure on the middle of the wooden formwork. This lateral pressure causes the prestressed beam to tend to bend towards the wooden formwork. At this time, the prestress generated by the steel cable on the prestressed beam will cancel out the lateral pressure, thereby reducing the impact of the lateral pressure and improving the quality of the pouring. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0022] Figure 2 yes Figure 1 Enlarged view of section A.

[0023] Figure 3 yes Figure 1 Enlarged view of section B.

[0024] Figure 4 This is a structural schematic diagram of Embodiment 1 of this application, used to illustrate the positional relationship between the clamping plate, the upper hook plate, and the lower hook plate.

[0025] Figure 5 This is a structural schematic diagram of Embodiment 2 of this application, which illustrates the positional relationship between the slide, the basket connecting cylinder, and the anti-loosening nut.

[0026] Explanation of reference numerals in the attached drawings: 1. Wooden formwork; 2. Vertical rib; 3. Horizontal rib; 4. Prestressed beam; 5. Tie rod; 6. Connecting assembly; 61. Clamping plate; 62. Ear plate; 63. Vertical waist hole; 64. Fixing screw; 65. Fixing nut; 66. Anchor; 661. Lower hook plate; 662. Upper hook plate; 663. Clearance groove; 664. Tensioning screw; 7. Reverse curve component; 71. Mounting plate; 72. Steel cable; 73. Stress frame; 74. Stress wheel; 8. Weight reduction hole; 9. Slide block; 10. Sliding block; 11. Connecting screw; 12. Basket connecting cylinder; 13. Anti-loosening nut; 14. Cable head; 15. Pin. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail. Example

[0028] This application discloses a formwork structure for a wall with fewer tie rods.

[0029] Reference Figure 1 A type of wall formwork structure with fewer tie rods includes a wooden formwork 1, vertical ribs 2, horizontal ribs 3 and prestressed beams 4 arranged in sequence. The cross-sections of the vertical ribs 2, horizontal ribs 3 and prestressed beams 4 are all I-shaped. The wooden formwork 1 can be made of plywood as in the prior art, and the vertical ribs 2, horizontal ribs 3 and prestressed beams 4 can all be made of steel.

[0030] Reference Figure 1 Several weight-reducing holes 8 are provided on both the prestressed beam 4 and the vertical rib 2. The weight-reducing holes 8 can be round holes or waist-shaped holes. The weight-reducing holes 8 on the prestressed beam 4 are evenly arranged along the length of the prestressed beam 4, and the weight-reducing holes 8 on the vertical rib 2 are evenly arranged along the length of the vertical rib 2.

[0031] Reference Figure 1 and Figure 2 Wooden formwork 1 is arranged on both sides of the wall to be poured. Multiple vertical ribs 2 are fixed at intervals on the wooden formwork 1. The vertical ribs 2 can be fixed to the wooden formwork 1 by structural adhesive in the existing technology. Multiple horizontal ribs 3 are arranged at intervals along the length direction of the vertical ribs 2. Multiple prestressed beams 4 are arranged at intervals along the length direction of the horizontal ribs 3. The length direction of the vertical ribs 2 is parallel to the length direction of the prestressed beams 4.

[0032] Reference Figure 1 and Figure 3 When the wooden formwork 1 is arranged vertically, tie rods 5 are bolted between the ends of the prestressed beams 4 on both sides of the wall to be poured. The tie rods 5 can be made of high tensile strength steel. The prestressed beams 4 are arranged vertically. The tie rods 5 at the bottom of the prestressed beams 4 pass through the wooden formwork 1, and the tie rods 5 at the top of the prestressed beams 4 are higher than the top of the wooden formwork 1.

[0033] The workers first select a wooden template 1 of appropriate size according to the size of the wall to be poured. Then, they use structural adhesive to fix and glue multiple vertical ribs 2 to the wooden template 1 in sequence at intervals. After the vertical ribs 2 are completely fixed to the wooden template 1, the workers place multiple horizontal ribs 3 on the vertical ribs 2 at intervals.

[0034] Reference Figure 1 Connection components 6 for fixing are arranged between the vertical rib 2 and the horizontal rib 3, and between the horizontal rib 3 and the prestressed beam 4.

[0035] Reference Figure 2 The connecting component 6 includes a clamping plate 61, which is arranged on both sides of the vertical rib 2 along its length and on both sides of the prestressed beam 4 along its length. Ear plates 62 are welded onto the clamping plate 61, and vertical waist holes 63 are provided on the ear plates 62.

[0036] Reference Figure 2 A fixing screw 64 is provided on the vertical waist hole 63 of the ear plate 62. The fixing screw 64 is used to pass through the weight reduction hole 8. The end of the fixing screw 64 is threaded with a fixing nut 65. The fixing nut 65 is used to abut against the ear plate 62. An anchor 66 is arranged on the clamping plate 61. The anchor 66 is used to fix the clamping plate 61 to the cross rib 3.

[0037] Reference Figure 2 and Figure 4 The anchor 66 includes a lower hook plate 661 welded to one end of the clamping plate 61, and an upper hook plate 662 slidably arranged at the other end of the clamping plate 61. The cross-sections of the lower hook plate 661 and the upper hook plate 662 are both L-shaped. The clamping plate 61 is provided with a clearance groove 663 for the upper hook plate 662 to slide. A tensioning screw 664 is threaded onto the clamping plate 61. The end of the tensioning screw 664 is rotatably connected to the upper hook plate 662. The upper hook plate 662 presses the transverse rib 3 onto the lower hook plate 661.

[0038] The worker first places the clamping plate 61 on both sides of the vertical rib 2 along its length, and at the same time makes the side of the clamping plate 61 abut against the side of the vertical rib 2. Then, by tightening the tensioning screw 664, the upper hook plate 662 is brought close to the lower hook plate 661, thereby fixing the clamping plate 61 to the horizontal rib 3, thus completing the fixing of the clamping plates 61 on both sides of the vertical rib 2.

[0039] Then, the fixing screws 64 are inserted into the vertical waist hole 63 on one side ear plate 62 of the vertical rib 2, the weight reduction hole 8 on the vertical rib 2, and the vertical waist hole 63 on the other side ear plate 62 of the vertical rib 2 in that order. Finally, the fixing nut 65 is tightened to fix the horizontal rib 3 to the vertical rib 2. The prestressed beam 4 is fixed to the horizontal rib 3 in the same way, and two sets of template systems are built according to the same installation method.

[0040] Reference Figure 1A reverse bending member 7 is arranged on the prestressed beam 4. The reverse bending member 7 is used to apply a prestress to the prestressed beam 4 with a bending away from the wooden template 1.

[0041] Reference Figure 1 and Figure 3 The inverted component 7 includes mounting plates 71 welded to both ends of the prestressed beam 4. A steel cable 72 is arranged between the two mounting plates 71. A cable head 14 is installed at the end of the steel cable 72. A pin 15 is inserted between the cable head 14 and the mounting plate 71. A stress frame 73 is arranged on the side of the prestressed beam 4 facing away from the wooden template 1. A stress wheel 74 is rotatably connected to the stress frame 73. The steel cable 72 passes around the stress wheel 74.

[0042] Apply release agent to the side of the wooden formwork 1 facing away from the vertical rib 2, and then lift the horizontal rib 3, the vertical rib 2 and the prestressed beam 4 simultaneously using hoisting equipment, so that the two sets of formwork systems are moved to both sides of the concrete wall to be poured. Then, the two ends of the prestressed beam 4 on the two sets of formwork systems are connected and fixed by tie rods 5.

[0043] During the process of connecting and fixing the ends of the prestressed beam 4 with tie rod 5, the steel cable 72 will be gradually tightened. At this time, a prestress will be generated in the middle of the prestressed beam 4, which will bend away from the wooden formwork 1. During the concrete pouring process, the wooden formwork 1 will generate outward expansion lateral pressure, and the prestress on the prestressed beam 4 will offset the lateral pressure from the wooden formwork 1, thereby reducing the possibility of deformation of the wooden formwork 1.

[0044] The implementation principle of Example 1 is as follows: the worker first selects a wooden template 1 of appropriate size according to the size of the wall to be poured, and then fixes multiple vertical ribs 2 to the wooden template 1 in sequence with structural adhesive. After the vertical ribs 2 are completely fixed to the wooden template 1, the worker places multiple horizontal ribs 3 on the vertical ribs 2 at intervals.

[0045] The worker first places the clamping plate 61 on both sides of the vertical rib 2 along its length, and at the same time makes the side of the clamping plate 61 abut against the side of the vertical rib 2. Then, by tightening the tensioning screw 664, the upper hook plate 662 is brought close to the lower hook plate 661, thereby fixing the clamping plate 61 to the horizontal rib 3, thus completing the fixing of the clamping plates 61 on both sides of the vertical rib 2.

[0046] Then, the fixing screws 64 are inserted into the vertical waist hole 63 on one side ear plate 62 of the vertical rib 2, the weight reduction hole 8 on the vertical rib 2, and the vertical waist hole 63 on the other side ear plate 62 of the vertical rib 2 in that order. Finally, the fixing nut 65 is tightened to fix the horizontal rib 3 to the vertical rib 2. The prestressed beam 4 is fixed to the horizontal rib 3 in the same way, and two sets of template systems are built according to the same installation method.

[0047] Apply release agent to the side of the wooden formwork 1 facing away from the vertical rib 2, and then lift the horizontal rib 3, the vertical rib 2 and the prestressed beam 4 simultaneously using hoisting equipment, so that the two sets of formwork systems are moved to both sides of the concrete wall to be poured. Then, the two ends of the prestressed beam 4 on the two sets of formwork systems are connected and fixed by tie rods 5.

[0048] During the process of connecting and fixing the ends of the prestressed beam 4 with tie rod 5, the steel cable 72 will be gradually tightened. At this time, a prestress will be generated in the middle of the prestressed beam 4, which will bend away from the wooden formwork 1. During the concrete pouring process, the wooden formwork 1 will generate outward expansion lateral pressure, and the prestress on the prestressed beam 4 will offset the lateral pressure from the wooden formwork 1, thereby reducing the possibility of deformation of the wooden formwork 1.

[0049] Embodiment 1 of this application discloses a construction method for a wall formwork structure with fewer tie rods, including the following steps: S1. Workers first select wooden formwork 1 of appropriate size according to the dimensions of the wall to be poured; S2. Multiple vertical ribs 2 are sequentially and intermittently fixed and bonded to the wooden template 1 using structural adhesive; S3. By turning the tension screw 664, the upper hook plate 662 is brought close to the lower hook plate 661, thereby fixing the clamping plate 61 on the horizontal rib 3. Then, the horizontal rib 3 is fixed on the vertical rib 2 by the fixing screw 64 and the fixing nut 65. S4. Using the same method, fix the prestressed beam 4 to the transverse rib 3 to form a template system; S5. Apply release agent to the side of the wooden template 1 facing away from the vertical rib 2; S6. The formwork system is moved to both sides of the concrete wall to be poured by hoisting equipment. Then, the two ends of the prestressed beams 4 on the two sets of formwork systems are connected and fixed by tie rods 5. During the connection and fixing process of tie rods 5, the steel cable 72 will be gradually tightened, so that a prestress will be generated in the middle of the prestressed beam 4 that bends away from the wooden formwork 1. S7. Pour concrete and remove the formwork system after the concrete has completely solidified. Example

[0050] refer to Figure 5 The difference between this embodiment and embodiment 1 is that: two slide blocks 9 are welded to the middle of the prestressed beam 4, and two stress frames 73 are arranged in the middle of the prestressed beam 4. The slide blocks 9 and stress frames 73 correspond one-to-one. A slider 10 with a T-shaped cross section is slidably arranged on the slide block 9, and the stress frame 73 is welded to the slider 10.

[0051] refer to Figure 5A connecting screw 11 is welded onto the slider 10. A basket connecting cylinder 12 is arranged between the two sliders 10. The connecting screw 11 is threaded onto the end of the basket connecting cylinder 12. The two connecting screws 11 are arranged symmetrically about the basket connecting cylinder 12. An anti-loosening nut 13 is threaded onto the connecting screw 11. The anti-loosening nut 13 abuts against the basket connecting cylinder 12.

[0052] The implementation principle of Example 2 is as follows: After the prestressed beam 4 is fixed on the crossbeam 3 and the end of the prestressed beam 4 is restricted by the tie rod 5, the worker rotates the basket connecting cylinder 12 in the forward direction. Under the restriction of the connecting rod 11 and the slider 10, the two sliders 10 move away from each other, thereby causing the stress wheels 74 on the two stress frames 73 to move away from each other. At this time, the steel cable 72 will be continuously tightened. The continuously tightened steel cable 72 will generate a prestress in the middle of the prestressed beam 4 that bends away from the wooden template 1. Then, the worker rotates the anti-loosening nut 13 in the reverse direction so that the anti-loosening nut 13 abuts against the basket connecting cylinder 12.

[0053] Application Example 2 discloses a construction method for a wall formwork structure with fewer tie rods, including the following steps: S1. Workers first select wooden formwork 1 of appropriate size according to the dimensions of the wall to be poured; S2. Multiple vertical ribs 2 are sequentially and intermittently fixed and bonded to the wooden template 1 using structural adhesive; S3. By turning the tension screw 664, the upper hook plate 662 is brought close to the lower hook plate 661, thereby fixing the clamping plate 61 on the horizontal rib 3. Then, the horizontal rib 3 is fixed on the vertical rib 2 by the fixing screw 64 and the fixing nut 65. S4. Using the same method, fix the prestressed beam 4 to the transverse rib 3 to form a template system; S5. Apply release agent to the side of the wooden template 1 facing away from the vertical rib 2; S6. The formwork system is moved to both sides of the concrete wall to be poured using hoisting equipment, and then the two ends of the prestressed beams 4 on the two sets of formwork systems are connected and fixed by tie rods 5. S7. The worker rotates the flower basket connecting cylinder 12 in the forward direction, so that the stress wheels 74 on the two stress frames 73 move away from each other. At this time, the steel cable 72 will be continuously tightened. The continuously tightened steel cable 72 will generate a prestress in the middle of the prestressed beam 4 that bends against the wooden template 1. After that, the worker rotates the anti-loosening nut 13 in the reverse direction, so that the anti-loosening nut 13 abuts against the flower basket connecting cylinder 12. S8. Pour concrete and remove the formwork system after the concrete has completely solidified.

[0054] 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 wall formwork structure with fewer tie rods, characterized in that: The structure includes a wooden template (1), vertical ribs (2), horizontal ribs (3), and prestressed beams (4) arranged sequentially. The wooden template (1) is arranged on both sides of the wall to be poured. Multiple vertical ribs (2) are fixed at intervals on the wooden template (1). Multiple horizontal ribs (3) are arranged at intervals along the length direction of the vertical ribs (2). Multiple prestressed beams (4) are arranged at intervals along the length direction of the horizontal ribs (3). The length direction of the vertical ribs (2) is parallel to the length direction of the prestressed beams (4). Tie rods (5) are detachably provided between the ends of the prestressed beams (4) on both sides of the wall to be poured. Connection components (6) for fixing are provided between the vertical ribs (2) and the horizontal ribs (3), and between the horizontal ribs (3) and the prestressed beams (4). A reverse bending member (7) is provided on the prestressed beams (4). The reverse bending member (7) is used to apply a prestress that bends away from the wooden template (1) to the prestressed beams (4).

2. The formwork structure for a wall with fewer tie rods according to claim 1, characterized in that: The cross sections of the vertical rib (2), the horizontal rib (3), and the prestressed beam (4) are all I-shaped. Several weight-reducing holes (8) are provided on the prestressed beam (4) and the vertical rib (2). The weight-reducing holes (8) on the prestressed beam (4) are evenly arranged along the length of the prestressed beam (4), and the weight-reducing holes (8) on the vertical rib (2) are evenly arranged along the length of the vertical rib (2).

3. A wall formwork structure with fewer tie rods according to claim 2, characterized in that: The connecting assembly (6) includes a clamping plate (61), which is arranged on both sides of the vertical rib (2) along its length and on both sides of the prestressed beam (4) along its length. The clamping plate (61) is provided with an ear plate (62), which is provided with a vertical waist hole (63). A fixing screw (64) is passed through the vertical waist hole (63) of the ear plate (62). The fixing screw (64) is used to pass through the weight reduction hole (8). The end of the fixing screw (64) is threaded with a fixing nut (65), which is used to abut against the ear plate (62). An anchor (66) is provided on the clamping plate (61), which is used to fix the clamping plate (61) on the horizontal rib (3).

4. A wall formwork structure with fewer tie rods according to claim 3, characterized in that: The anchor (66) includes a lower hook plate (661) disposed at one end of the clamping plate (61), and an upper hook plate (662) slidably disposed at the other end of the clamping plate (61). The cross-sections of the lower hook plate (661) and the upper hook plate (662) are both L-shaped. The clamping plate (61) is provided with a clearance groove (663) for the upper hook plate (662) to slide. A tensioning screw (664) is threaded onto the clamping plate (61). The tensioning screw (664) is rotatably disposed on the upper hook plate (662). The upper hook plate (662) presses the transverse rib (3) against the lower hook plate (661).

5. A wall formwork structure with fewer tie rods according to claim 1, characterized in that: The prestressed beam (4) is arranged vertically, and the tie rod (5) at the bottom of the prestressed beam (4) passes through the wooden template (1). The tie rod (5) at the top of the prestressed beam (4) is positioned higher than the top of the wooden template (1).

6. A wall formwork structure with fewer tie rods according to claim 5, characterized in that: The inverted member (7) includes mounting plates (71) at both ends of the prestressed beam (4), a steel cable (72) is provided between the two mounting plates (71), a stress frame (73) is arranged on the side of the prestressed beam (4) facing away from the wooden template (1), a stress wheel (74) is rotatably provided on the stress frame (73), and the steel cable (72) passes around the stress wheel (74).

7. A wall formwork structure with fewer tie rods according to claim 6, characterized in that: Two slide blocks (9) are provided in the middle of the prestressed beam (4). Two stress frames (73) are arranged in the middle of the prestressed beam (4). The slide blocks (9) correspond one-to-one with the stress frames (73). A slider (10) is slidably arranged on the slide block (9). The stress frame (73) is arranged on the slider (10). A connecting screw (11) is provided on the slider (10). A basket connecting cylinder (12) is arranged between the two sliders (10). The connecting screw (11) is threaded to the end of the basket connecting cylinder (12). The two connecting screws (11) are symmetrically arranged about the basket connecting cylinder (12). A lock nut (13) is threaded on the connecting screw (11). The lock nut (13) abuts against the basket connecting cylinder (12).

8. A construction method for a wall formwork structure with few tie rods according to any one of claims 1-7, characterized in that: Includes the following steps: S1. The worker first selects the appropriate size of the wooden template (1) according to the size of the concrete wall to be poured, and then fixes multiple vertical ribs (2) at intervals on the wooden template (1). S2. The plurality of horizontal ribs (3) are fixed at intervals on the vertical ribs (2) by means of the connecting component (6); S3. Fix multiple prestressed beams (4) at intervals on the crossbeams (3) using the connecting assembly (6), then open holes on one side of the bottom of the wooden template (1) for the tie rods (5) to pass through, and then lift the crossbeams (3) using the hoisting equipment. S4. Fix the ends of the prestressed beams (4) on both sides of the wall to be poured by means of the tie rods (5) so that the two wooden templates (1) are kept at a suitable distance. S5. Apply prestress to the prestressed beam (4) through the anti-curving member (7) so that the prestressed beam (4) tends to bend away from the wooden template (1).

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