Seamless splicing system for concrete formworks

Abstract

The invention provides a concrete formwork seamless splicing system, and belongs to the technical field of concrete formworks, the concrete formwork seamless splicing system comprises a main frame, a splicing formwork, a fixing clamp, an adjusting mechanism, a connecting plate, a locking device, a sealing strip and a supporting structure; the main frame is composed of a plurality of stand columns and cross beams, and a stable frame structure is formed. The splicing template is of a rectangular plate-shaped structure and is made of a high-strength alloy material, and grooves are formed in the peripheral edges of the splicing template; the fixing clamps are installed on the stand columns of the main frame and used for fixing the splicing formworks. The adjusting mechanism is mounted on the fixing clamp and is used for adjusting the position of the splicing template; the connecting plate is of a long-strip-shaped structure, protrusions are arranged on the two sides of the connecting plate, and the connecting plate is used for being inserted into grooves of adjacent splicing formworks to achieve seamless connection between the formworks. The problem that in the existing concrete formwork installation process, the installation efficiency is low can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete formworks, and in particular relates to a seamless splicing system for concrete formworks. Background Art

[0002] Concrete formwork is a temporary formwork structure widely used in construction projects, playing an important role in concrete pouring, curing and demoulding. Traditional concrete formwork is usually made of wood or steel, which has many inconveniences in connection and installation. Wooden formwork requires a lot of labor to assemble and disassemble, and is prone to deformation and cracking; although steel formwork has high strength, it requires large lifting equipment during installation, which is less efficient. Another new type of formwork, such as plastic formwork and fiberglass formwork, is lightweight, but it is also difficult to achieve quick and seamless splicing due to the use of integral molding or multi-component assembly.

[0003] In order to solve the problems of low installation efficiency and loose connection of traditional concrete formwork, the industry has developed some new formwork splicing systems. Among them, the most common is the use of metal frames and clamp structures, which use adjustment mechanisms to achieve precise positioning and quick connection between formworks. This structure can improve the installation efficiency of the formwork, but due to the certain installation gap between the formwork and the frame, problems such as leakage and deformation are inevitable. In addition, although some modular splicing systems can achieve fast assembly, due to the limited size of each module, a large number of modules are required to complete a large area of ​​formwork, resulting in increased material and labor costs.

[0004] Therefore, there is an urgent need to develop a new type of seamless splicing system for concrete formwork, which can not only ensure the precise docking between the formworks, but also achieve rapid installation and disassembly, while also having good sealing and support stability to meet various complex on-site construction needs. Summary of the invention

[0005] In view of this, the present invention provides a seamless splicing system for concrete formwork, which can solve the problem of low installation efficiency in the existing concrete formwork installation process.

[0006] The present invention is achieved in that:

[0007] The present invention provides a seamless splicing system for concrete formwork, which comprises: a main frame, a splicing formwork, a fixing fixture, an adjusting mechanism, a connecting plate, a locking device, a sealing strip and a supporting structure; the main frame is composed of a plurality of columns and beams to form a stable frame structure; the splicing formwork is a rectangular plate structure, made of a high-strength alloy material, and grooves are arranged on the four edges of the splicing formwork; the fixing fixture is installed on the columns of the main frame to fix the splicing formwork; the adjusting mechanism is installed on the fixing fixture to adjust the position of the splicing formwork; the connecting plate is a long strip structure, with protrusions on both sides for inserting into the grooves of adjacent splicing formworks to achieve seamless connection between the formworks; the locking device is installed on the connecting plate to firmly lock the connecting plate between the splicing formworks; the sealing strip is installed in the groove of the splicing formwork to enhance the sealing between the formworks; the supporting structure is installed at the bottom of the main frame to provide additional supporting force.

[0008] The seamless concrete formwork splicing system provided by the present invention solves the problems of low efficiency, poor sealing, unstable support, etc. existing in the existing formwork splicing system through the coordinated cooperation of the main frame, splicing formwork, fixing fixture, adjustment mechanism, connecting plate, locking device, sealing strip and supporting structure, and has the following outstanding technical advantages:

[0009] 1. Realize fast and seamless connection between templates. This system uses adjustable fixing fixtures and precise connection plate structure, which can quickly install the spliced ​​templates, realize seamless connection between templates, and eliminate the installation gap under the traditional method. At the same time, the system is equipped with a locking device, which can firmly lock the template in place by simply tightening the bolts, greatly improving the installation efficiency.

[0010] 2. Ensure good sealing between templates. The template surface is coated with epoxy resin and polytetrafluoroethylene anti-stick coating, which closely cooperates with the sealing strip of the T-shaped structure to form a reliable sealing system, effectively preventing the leakage of concrete slurry. At the same time, the elastic deformation characteristics of the sealing strip and the silicone rubber waterproof coating ensure that a good sealing effect can be maintained when the template is deformed and vibrated.

[0011] 3. Have stable support capability. The main frame adopts a rigid structure of hollow columns and I-shaped beams, with internal reinforcement ribs, and the support structure connected with the anchor bolts forms an integral support system. By adjusting the height of the support feet, the unevenness of the ground can be quickly eliminated to ensure the stability of the entire formwork system. Even when subjected to dynamic loads, it can maintain good overall stability.

[0012] 4. The template position can be precisely adjusted. With the cooperation of the fixing fixture and the adjustment mechanism, this system can achieve fine positioning and adjustment of the spliced ​​template. By rotating the adjustment screw, the adjustment block can be fine-tuned in the horizontal direction to ensure that the height and flatness of the adjacent templates meet the requirements. This precise adjustment function is particularly important for the formwork of complex structures.

[0013] 5. Optimization of material and structural design. The splicing templates and connecting plates made of high-strength alloy materials in the system have undergone special surface treatment, which not only have excellent strength and wear resistance, but also can greatly reduce the dead weight, making it easier to install and carry. At the same time, the compact structural design and reasonable mechanical calculation ensure that the entire formwork system remains stable and reliable when subjected to complex loads.

[0014] In summary, the seamless splicing system of concrete formwork provided by the present invention fully combines the latest achievements in modern materials science, mechanical design, structural mechanics and other fields. While ensuring precise docking between formworks, good sealing and support stability, it greatly improves the efficiency and convenience of formwork installation, and provides a high-quality formwork solution for the construction of complex building projects.

[0015] On the basis of the above technical solution, a seamless splicing system of concrete formwork of the present invention can also be improved as follows:

[0016] Among them, the columns of the main frame are hollow structures, with reinforcing ribs inside the columns and a number of evenly distributed threaded holes on the outer surface of the columns for installing fixing fixtures; the crossbeam is an I-shaped structure, with connecting plates at both ends of the beam, with through holes corresponding to the threaded holes of the columns on the connecting plates, and the crossbeam and the columns are fixedly connected by bolts; the bottom end of the column is provided with a support foot with adjustable height, the support foot consists of a threaded rod and a base, the threaded rod cooperates with the internal thread at the bottom of the column, and the height is adjusted by rotating the threaded rod.

[0017] Furthermore, the surface of the splicing template is coated with an anti-stick coating, which is composed of an epoxy resin and polytetrafluoroethylene composite material; the back of the splicing template is provided with reinforcing ribs, which are distributed in a grid pattern to enhance the rigidity of the template; the edge grooves around the splicing template are L-shaped, and the inner wall of the groove is provided with anti-slip texture to increase the friction with the connecting plate.

[0018] Furthermore, the fixing clamp includes a clamp body, a clamp bolt and a locking nut; the clamp body is a U-shaped structure, the opening of the U-shaped structure faces the splicing template, and the back of the U-shaped structure is provided with a long strip through hole corresponding to the threaded hole of the column, and the clamp body is fixed to the column by bolts; the clamping bolt passes through the two arms of the U-shaped structure, one end of the bolt is provided with a handle, and the other end is provided with a pressure plate, and the pressure plate is in contact with the splicing template; the locking nut is installed on the clamping bolt and is used to adjust and fix the position of the pressure plate.

[0019] Furthermore, the adjustment mechanism includes an adjusting screw, an adjusting block and a fixing nut; one end of the adjusting screw is hinged to the fixing clamp, and the other end passes through the adjusting block; the adjusting block is a rectangular structure, the center of which is provided with a threaded hole matching the adjusting screw, and one side of the adjusting block is in contact with the splicing template; the fixing nut is installed at the end of the adjusting screw to lock the position of the adjusting block; by rotating the adjusting screw, the adjusting block moves in the horizontal direction, thereby adjusting the position of the splicing template.

[0020] Furthermore, the cross-section of the connecting plate is an I-shaped structure, and the raised parts on both sides of the I-shaped structure match the grooves of the splicing template; the connecting plate is made of high-strength alloy steel, and the surface is hardened to increase wear resistance; the length of the connecting plate is equal to the side length of the splicing template, and the width is slightly smaller than the total width of the grooves of two adjacent splicing templates, so as to facilitate installation and disassembly.

[0021] Furthermore, the locking device includes a locking bolt, a locking plate and a spring washer; the locking bolt passes through a through hole reserved on the connecting plate, and a hexagonal groove is provided on the bolt head for easy tightening using tools; the locking plate is a long strip structure, with a threaded hole in the middle matching the locking bolt, and the two ends of the locking plate respectively extend into the grooves of adjacent splicing templates; the spring washer is installed between the locking bolt and the connecting plate to maintain the locking force and prevent the bolt from loosening.

[0022] Furthermore, the sealing strip is made of an elastomeric material and has a T-shaped cross-section. The vertical part of the T-shaped structure is inserted into the groove of the splicing template, and the horizontal part is located between two adjacent splicing templates. The surface of the sealing strip is coated with a waterproof coating, which is composed of a silicone rubber material. Chamfers are provided on both sides of the sealing strip to reduce stress concentration and improve the sealing effect.

[0023] Furthermore, the supporting structure includes a diagonal brace, a connecting node and an anchor bolt; the diagonal brace is a hollow circular tube structure with hinge joints at both ends; the connecting node is a spherical structure with a plurality of threaded holes on the surface for connecting the diagonal brace and the columns of the main frame; the anchor bolt is installed at the lower end of the diagonal brace for fixing the supporting structure to the ground; the diagonal brace is installed at a 45-degree angle, and a group of supporting structures is arranged at the corner of each main frame to provide all-round supporting force.

[0024] Furthermore, the relationship between the groove width of the splicing template and the protrusion width of the connecting plate is defined by the following relationship definition equation: c =W g -2δ+∈; where W c W is the width of the connecting plate protrusion; g is the width of the groove of the splicing template; δ is the installation gap; ∈ is the error term.

[0025] Compared with the prior art, the concrete formwork seamless splicing system provided by the present invention has the following beneficial effects:

[0026] 1. Realize fast and seamless connection between templates. This system uses adjustable fixing fixtures and precise connection plate structure, which can quickly install the spliced ​​templates, realize seamless connection between templates, and eliminate the installation gap under the traditional method. At the same time, the system is equipped with a locking device, which can firmly lock the template in place by simply tightening the bolts, greatly improving the installation efficiency.

[0027] 2. Ensure good sealing between templates. The template surface is coated with epoxy resin and polytetrafluoroethylene anti-stick coating, which closely cooperates with the sealing strip of the T-shaped structure to form a reliable sealing system, effectively preventing the leakage of concrete slurry. At the same time, the elastic deformation characteristics of the sealing strip and the silicone rubber waterproof coating ensure that a good sealing effect can be maintained when the template is deformed and vibrated.

[0028] 3. Have stable support capability. The main frame adopts a rigid structure of hollow columns and I-shaped beams, with internal reinforcement ribs, and the support structure connected with the anchor bolts forms an integral support system. By adjusting the height of the support feet, the unevenness of the ground can be quickly eliminated to ensure the stability of the entire formwork system. Even when subjected to dynamic loads, it can maintain good overall stability.

[0029] 4. The template position can be precisely adjusted. With the cooperation of the fixing fixture and the adjustment mechanism, this system can achieve fine positioning and adjustment of the spliced ​​template. By rotating the adjustment screw, the adjustment block can be fine-tuned in the horizontal direction to ensure that the height and flatness of the adjacent templates meet the requirements. This precise adjustment function is particularly important for the formwork of complex structures.

[0030] 5. Optimization of material and structural design. The splicing templates and connecting plates made of high-strength alloy materials in the system have undergone special surface treatment, which not only have excellent strength and wear resistance, but also can greatly reduce the dead weight, making it easier to install and carry. At the same time, the compact structural design and reasonable mechanical calculation ensure that the entire formwork system remains stable and reliable when subjected to complex loads.

[0031] In summary, the seamless splicing system of concrete formwork provided by the present invention fully combines the latest achievements in modern materials science, mechanical design, structural mechanics and other fields. While ensuring precise docking between formworks, good sealing and support stability, it greatly improves the efficiency and convenience of formwork installation, and provides a high-quality formwork solution for the construction of complex building projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0033] Figure 1 It is a structural schematic diagram of a seamless splicing system of concrete formwork;

[0034] Figure 2 A top view of a splicing formwork of a seamless splicing system of a concrete formwork;

[0035] Figure 3 It is the structural diagram of A;

[0036] Figure 4 It is a structural diagram of B;

[0037] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0038] 10. Main frame; 11. Column; 12. Beam; 13. Support foot; 20. Joint template; 21. Groove; 30. Fixing fixture; 31. Fixing fixture body; 32. Clamping bolt; 33. Locking nut; 40. Adjustment mechanism; 50. Connecting plate; 60. Locking device; 61. Locking bolt; 62. Locking plate; 70. Sealing strip; 80. Support structure; 81. Diagonal brace; 82. Connection node; 83. Anchor bolt. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] like Figure 1-4 As shown, it is an embodiment of a seamless splicing system of concrete formwork provided by the present invention, in this embodiment, it includes: a main frame 10, a splicing formwork 20, a fixing fixture 30, an adjusting mechanism 40, a connecting plate 50, a locking device 60, a sealing strip 70 and a supporting structure 80; the main frame is composed of a plurality of columns 11 and a crossbeam 12 to form a stable frame structure; the splicing formwork is a rectangular plate structure made of high-strength alloy material, and grooves 21 are provided on the edges of the splicing formwork; the fixing fixture is installed on the column of the main frame to fix the splicing formwork; the adjusting mechanism is installed on the fixing fixture to adjust the position of the splicing formwork; the connecting plate is a long strip structure with protrusions on both sides for inserting into the grooves of adjacent splicing formworks to achieve seamless connection between the formworks; the locking device is installed on the connecting plate to firmly lock the connecting plate between the splicing formworks; the sealing strip is installed in the groove of the splicing formwork to enhance the sealing between the formworks; the supporting structure is installed at the bottom of the main frame to provide additional supporting force.

[0041] Among them, in the above technical scheme, the columns of the main frame are hollow structures, reinforcing ribs are arranged inside the columns, and a number of evenly distributed threaded holes are arranged on the outer surface of the columns for installing fixing fixtures; the crossbeam is an I-shaped structure, connecting plates are arranged at both ends of the crossbeam, and through holes corresponding to the threaded holes of the columns are arranged on the connecting plates, and the crossbeam and the columns are fixedly connected by bolts; the bottom end of the column is provided with a support foot 13 with adjustable height, and the support foot is composed of a threaded rod and a base, the threaded rod cooperates with the internal thread at the bottom of the column, and the height is adjusted by rotating the threaded rod.

[0042] Furthermore, in the above technical solution, the surface of the splicing template is coated with an anti-stick coating, which is composed of an epoxy resin and polytetrafluoroethylene composite material; the back of the splicing template is provided with reinforcing ribs, which are distributed in a grid pattern to enhance the rigidity of the template; the edge grooves around the splicing template are L-shaped, and the inner wall of the groove is provided with anti-slip texture to increase the friction with the connecting plate.

[0043] Furthermore, in the above technical solution, the fixing clamp includes a clamp body 31, a clamping bolt 32 and a locking nut 33; the clamp body is a U-shaped structure, the opening of the U-shaped structure faces the splicing template, and the back of the U-shaped structure is provided with a long strip through hole corresponding to the threaded hole of the column, and the clamp body is fixed to the column by bolts; the clamping bolt passes through the two arms of the U-shaped structure, a handle is provided at one end of the bolt, and a pressure plate is provided at the other end, and the pressure plate is in contact with the splicing template; the locking nut is installed on the clamping bolt for adjusting and fixing the position of the pressure plate.

[0044] Furthermore, in the above technical scheme, the adjustment mechanism includes an adjusting screw, an adjusting block and a fixing nut; one end of the adjusting screw is hinged to the fixing clamp, and the other end passes through the adjusting block; the adjusting block is a rectangular structure, the center of which is provided with a threaded hole matching the adjusting screw, and one side of the adjusting block is in contact with the splicing template; the fixing nut is installed at the end of the adjusting screw to lock the position of the adjusting block; by rotating the adjusting screw, the adjusting block moves in the horizontal direction, thereby adjusting the position of the splicing template.

[0045] Furthermore, in the above technical solution, the cross-section of the connecting plate is an I-shaped structure, and the raised parts on both sides of the I-shaped structure match the grooves of the splicing template; the connecting plate is made of high-strength alloy steel, and the surface is hardened to increase wear resistance; the length of the connecting plate is equal to the side length of the splicing template, and the width is slightly smaller than the total width of the grooves of two adjacent splicing templates, so as to facilitate installation and disassembly.

[0046] Furthermore, in the above technical solution, the locking device includes a locking bolt 61, a locking plate 62 and a spring washer; the locking bolt passes through a through hole reserved on the connecting plate, and a hexagonal groove is provided on the bolt head for easy tightening using tools; the locking plate is a long strip structure, with a threaded hole matching the locking bolt in the middle, and the two ends of the locking plate are respectively extended into the grooves of adjacent splicing templates; the spring washer is installed between the locking bolt and the connecting plate to maintain the locking force and prevent the bolt from loosening.

[0047] Furthermore, in the above technical solution, the sealing strip is made of an elastomeric material and has a T-shaped cross-section. The vertical part of the T-shaped structure is inserted into the groove of the splicing template, and the horizontal part is located between two adjacent splicing templates. The surface of the sealing strip is coated with a waterproof coating, which is composed of a silicone rubber material. Chamfers are provided on both sides of the sealing strip to reduce stress concentration and improve the sealing effect.

[0048] Furthermore, in the above technical solution, the supporting structure includes a diagonal brace 81, a connecting node 82 and an anchor bolt 83; the diagonal brace is a hollow circular tube structure with hinge joints at both ends; the connecting node is a spherical structure with a plurality of threaded holes on the surface for connecting the diagonal brace and the columns of the main frame; the anchor bolt is installed at the lower end of the diagonal brace for fixing the supporting structure to the ground; the diagonal brace is installed at a 45-degree angle, and a group of supporting structures is arranged at the corner of each main frame to provide all-round supporting force.

[0049] Furthermore, in the above technical solution, the relationship between the groove width of the splicing template and the protrusion width of the connecting plate is defined by the following relationship definition equation: c =W g -2δ+∈; where W c W is the width of the connecting plate protrusion; gis the width of the groove of the splicing template; δ is the installation gap; ∈ is the error term.

[0050] 1. Dimensional correlation between the splicing template and the connecting plate: The relationship between the groove width of the splicing template and the protrusion width of the connecting plate can be expressed as follows: W c =W g -2δ+∈; where W c W is the width of the connecting plate protrusion; g is the width of the groove of the splicing template; δ is the installation gap; ∈ is the error term.

[0051] Parameter acquisition method: W g and W c Obtained by direct measurement with precision measuring instruments. δ is determined according to installation requirements and is usually between 0.1mm and 0.5mm. ∈ is obtained by taking the average value of multiple measurements and is usually within ±0.05mm.

[0052] 2. Pressure relationship between the fixing fixture and the splicing template: The pressure of the fixing fixture on the splicing template can be expressed as follows: Where P is the pressure; F is the force applied by the fixture; A is the contact area; k is the elastic coefficient of the fixture; Δk is the deformation of the fixture; μ is the damping coefficient; t is the time; and ρ is the error term.

[0053] Parameter acquisition method: A is obtained by measuring the contact area between the clamp plate and the template. l is obtained by pressure testing the clamp. Δx is measured by a displacement sensor. μ is obtained by dynamic pressure testing. ρ is obtained by taking the average value of multiple measurements, and its range is usually within ±0.01MPa.

[0054] 3. Position adjustment accuracy of the adjustment mechanism: The position adjustment accuracy of the adjustment mechanism can be expressed as follows: Wherein, ΔL is the adjustment distance; p is the pitch of the adjusting screw; θ is the rotation angle; α and β are nonlinear correction coefficients; γ is the error term.

[0055] Parameter acquisition method: p is obtained by measuring the pitch of the adjusting screw. θ is measured by an angle sensor. α and β are obtained by nonlinear regression analysis. The specific steps are as follows: Step 1: Collect multiple sets of θ and ΔL data; Step 2: Use the least squares method to fit the data and obtain the values ​​of α and β: γ is obtained by taking the average value of multiple measurements, and its range is usually within ±0.01mm.

[0056] 4. Relationship between the locking force of the locking device and the bolt rotation angle: The relationship between the locking force of the locking device and the bolt rotation angle can be expressed as follows: F = F0e λφ+Kφ+σ; where F is the locking force; F0 is the initial preload; λ is the exponential coefficient; φ is the bolt rotation angle; K is the linear coefficient; σ is the error term.

[0057] Parameter acquisition method: F0 is obtained by initial torque wrench measurement. λ and K are obtained by fitting experimental data. The specific steps are as follows: Step 1: Collect multiple sets of φ and F data; Step 2: Use nonlinear least squares method to fit the data and obtain the values ​​of λ and K: σ is obtained by taking the average value of multiple measurements, and its range is usually within ±10N.

[0058] 5. Relationship between compression deformation of sealing strip and sealing effect: The relationship between compression deformation of sealing strip and sealing effect can be expressed as follows: Where, E is the sealing effect index (between 0 and 1); η is the material property coefficient; Δh is the compression deformation; h0 is the original height of the sealing strip; m is the power coefficient; ξ is the error term.

[0059] Parameter acquisition method: h0 is obtained by direct measurement. Δh is measured by displacement sensor. η and m are obtained by fitting experimental data. The specific steps are as follows: Step 1: Perform sealing performance test and collect multiple sets of Δh and E data; Step 2: Use nonlinear least squares method to fit the data and obtain the values ​​of η and m: ξ is obtained by taking the average value of multiple measurements, and its range is usually within ±0.01.

[0060] 6. Relationship between the stability of the supporting structure and the tilt angle: The relationship between the stability of the supporting structure and the tilt angle can be expressed as follows: Where S is the stability index; S0 is the foundation stability in the vertical state; θ is the inclination angle; g is the gravitational acceleration; ω is the dynamic load frequency; i is the imaginary unit; ψ is the error term.

[0061] Parameter acquisition method: S0 is obtained through stability test in vertical state. θ is measured by inclination sensor. ω is obtained through vibration test. ψ is obtained by taking the average value of multiple measurements, and its range is usually within ±0.1.

[0062] These equations cover the correlation between the main components in the seamless joint system of concrete formwork, including dimensions, pressure, precision, mechanics, and stability. Each equation contains measurable or fitable parameters, as well as error terms. Mathematical expressions such as exponents, powers, trigonometric functions, and complex numbers are used in the equations to more accurately describe the relationship between the components. At the same time, methods and steps for obtaining parameters are also provided to ensure the feasibility and verifiability of the equations.

[0063] 1. Main frame The main frame is composed of several hollow columns and I-shaped beams to form a stable frame structure. The columns are made of thick-walled aluminum alloy pipes, and are equipped with multiple longitudinal reinforcement ribs inside to improve the overall strength. The outer surface of the column is evenly distributed with M16 threaded holes with a spacing of 250mm for installing fixing fixtures. The beam is made of 300mm high and 100mm wide I-beam profiles, with 120mm wide and 10mm thick connecting plates at both ends. There are through holes with a diameter of 18mm on the connecting plate, which correspond to the threaded holes of the column. The beam is firmly connected to the column through M16 bolts. The bottom end of the column is equipped with a rotatable and adjustable support foot, which consists of a threaded rod with a diameter of 50mm and a height of 200mm and a base of 120mm×120mm and a thickness of 20mm. The height of the column can be adjusted within the range of ±50mm by rotating the threaded rod to ensure the overall level of the main frame.

[0064] 2. Splicing template The splicing template adopts a 500mm×1000mm rectangular plate structure with a thickness of 20mm and is made of high-strength, corrosion-resistant aluminum-magnesium alloy plate. The surface of the template is coated with a 2mm thick epoxy resin and polytetrafluoroethylene composite anti-stick coating to improve the wear resistance and demoulding properties of the template. The back of the template is equipped with 10mm wide and 15mm high criss-cross reinforcing ribs to form a grid structure, which effectively enhances the bending rigidity of the template. The edges of the template are equipped with a 25mm wide and 20mm deep L-shaped groove, and the inner wall of the groove is processed with a 0.5mm deep anti-slip pattern to increase the bite force with the connecting plate. According to the formula W c =W g -2δ+∈, template groove width W g Designed to be 27mm, with a 26mm wide connecting plate protrusion W c The installation gap δ is controlled at about 0.3mm, and the error ∈ is controlled within ±0.05mm.

[0065] 3. Fixing fixture The fixing fixture includes a U-shaped fixture body, an M16×120mm clamping bolt and an M16spiral locking nut. The fixture body is stamped into a U-shaped structure using a 6mm thick steel plate. The U-shaped opening faces the splicing template. There is a 120mm long and 18mm wide strip through hole on the back, which corresponds to the threaded hole of the column. The fixture body is fixed to the column by an M16×40mm bolt. A 50mm diameter handwheel is provided at one end of the clamping bolt, and a 100mm×80mm, 10mm thick pressure plate is welded to the other end. The pressure plate is in contact with the surface of the splicing template. The locking nut is installed on the clamping bolt and is used to adjust and fix the position of the pressure plate. According to the formula When the clamping bolt is rotated 3 times, a pressure of about 0.8 MPa can be applied to the splicing template, and the contact area A is 80 cm 2 , the elastic coefficient k of the fixture is 1.2×106 N / m, the damping coefficient μ is 50N·s / m, and the error term ρ is less than ±0.01MPa.

[0066] 4. Adjustment mechanism The adjustment mechanism includes an M20×2 pitch adjustment screw, an 80mm×60mm×40mm adjustment block and an M20 hexagonal locking nut. One end of the adjustment screw is mounted on the fixing fixture through a hinge, and the other end passes through the central threaded hole of the adjustment block. The adjustment block is a rectangular structure with a smooth surface, and one side is in direct contact with the splicing template. The locking nut is installed at the end of the adjustment screw to fix the position of the adjustment block. By rotating the adjustment screw, the adjustment block can be adjusted in the horizontal direction at a speed of 0.5mm per turn to achieve fine positioning of the splicing template. According to the formula The pitch p of the adjusting screw is 2 mm, and the nonlinear correction coefficient α is 0.01 mm / rad. 2 , β=0.0005mm / rad 3 , the error term γ is less than ±0.01mm.

[0067] 5. Connecting plate The connecting plate is an I-shaped cross-section structure with a length of 500mm, a width of 80mm, and a thickness of 10mm. It is made of 45Si2MnA high-strength alloy steel, and the surface is quenched and tempered to improve hardness and wear resistance. There are 25mm wide and 10mm high protrusions on both sides of the connecting plate, which match the L-shaped grooves of the splicing template. The material strength of the connecting plate reaches 1200MPa, the tensile strength is greater than 1100MPa, and the hardness can reach 45-50HRC after surface nitrogen treatment. The length of the connecting plate is the same as the side length of the splicing template, and the width is slightly smaller than the total width of the grooves of two adjacent templates (53mm), which is convenient for installation and disassembly.

[0068] 6. Locking device The locking device includes a M16×80mm hexagonal head locking bolt, a 120mm long and 30mm wide locking plate and an M16 spring washer. The bolt head of the locking bolt is provided with a 6mm deep hexagonal groove, which is convenient for using a wrench to apply sufficient torque. The locking plate is a long strip structure with a through hole of 17mm in diameter in the middle, and the two ends are respectively inserted into the grooves of the adjacent splicing templates. The spring washer is installed between the locking bolt and the connecting plate to maintain the locking force and prevent the bolt from loosening. According to the formula F=F0e λφ +Kφ+σ, when the locking bolt is rotated 120° (i.e. 3 / 4 turn), a locking force of about 4000N can be generated, the initial preload force F0 is 2500N, the exponential coefficient λ is 0.012rad^-1, the linear coefficient K is 15N / rad, and the error term σ is less than ±10N.

[0069] 7. Sealing strip The sealing strip is made of polyurethane elastomer material, and its cross section is T-shaped. The vertical part of the T-shaped structure is 20mm wide and 15mm high, inserted into the groove of the splicing template, and the horizontal part is 30mm wide and located between two adjacent templates. The surface of the sealing strip is coated with a 0.5mm thick silicone rubber waterproof coating, and a 15° chamfer is set on both sides to reduce stress concentration. According to the formula When the sealing strip is compressed by 50% (Δh / h0=0.5), the sealing effect index E can reach 0.95, the material characteristic coefficient η is 5, the power index m is 1.2, and the error term ξ is less than ±0.011.

[0070] 8. Support structure The support structure includes Φ60mm×4mm thick hollow circular tube diagonal braces, Φ100mm spherical connection nodes and M24 anchor bolts. There are hinge joints at both ends of the diagonal braces. The connection nodes are spherical structures with 12 M16 threaded holes on the surface for connecting the diagonal braces and the main frame columns. The anchor bolts are installed at the lower end of the diagonal braces to fix the support structure to the ground. The diagonal braces are installed at a 45° angle, and a set of support structures is set at each of the four corners of each main frame to form a solid support system. According to the formula When the inclination angle θ of the diagonal brace is less than 5°, the stability index S of the supporting structure is greater than 0.95, the foundation stability S0 is 0.98, the gravity acceleration g is 9.8m / s^2, the dynamic load frequency ω is less than 2Hz, and the error term ψ is less than ±0.1.

[0071] In summary, this seamless splicing system of concrete formwork realizes functions such as rapid seamless connection between formworks, reliable sealing, precise positioning adjustment and stable support through the careful design of components such as main frame, splicing formwork, fixing fixture, adjustment mechanism, connecting plate, locking device, sealing strip and supporting structure. The size, material, connection method and mechanical properties of each component are described by clear mathematical models, which provides a theoretical basis for the optimal design and performance verification of the system. The specific implementation plan of the whole system integrates knowledge from multiple disciplines, such as material mechanics, mechanical design, structural mechanics, etc., and embodies high technical innovation.

[0072] Example

[0073] A large-scale urban rail transit project is entering the critical concrete structure pouring stage. The project involves multiple complex concrete structures such as platforms, station bodies and connecting passages, which puts forward strict requirements on the formwork system. The project party decided to adopt the concrete formwork seamless splicing system provided by the present invention as the core solution for formwork to meet the construction requirements of fast, sealed and stable.

[0074] 1. Production and installation of the main frame

[0075] The production of the main frame starts with the columns and beams. The columns are made of Φ150mm×10mm thick 6063-T6 aluminum alloy pipes, with 6 steel bars welded inside as reinforcement ribs. The outer surface of the columns is processed with M16×2.0 threaded holes with a hole spacing of 250mm. The crossbeams are made of 300mm high and 100mm wide Q345b I-beam profiles, with 120mm wide and 10mm thick connecting plates welded at both ends. The connecting plates are opened with Φ18mm through holes, which match the threaded holes of the columns. The height-adjustable support feet are installed at the bottom of the columns. The support feet are composed of Φ50mm×M20×2.0 threaded rods and 120mm×120mm, 20mm thick bases.

[0076] After precise measurement, the project required a main frame with a length of 5000mm and a width of 1000mm, a total of 40 columns and 20 beams. First, the columns were erected at the construction site according to the designed spacing, and the verticality of the columns was corrected by a level. Then, the beams and columns were reliably connected with M16×40mm bolts to form a stable support frame. In order to eliminate the height difference of the ground, the workers adjusted the supporting feet of each column to keep the main frame in a good horizontal state. The entire main frame installation work took about 2 days, and the efficiency was increased by more than 30% compared with the traditional wooden formwork method.

[0077] 2. Production and installation of splicing templates

[0078] As the core component of the present invention, the splicing template is made of high-strength aluminum-magnesium alloy plate, with a size of 500mm×1000mm and a thickness of 20mm. The surface of the template is coated with a 2mm thick epoxy resin and polytetrafluoroethylene composite anti-stick coating, and the back is provided with 10mm wide and 15mm high criss-cross reinforcing ribs to form a grid structure. The edges of the template are processed with 25mm wide and 20mm deep L-shaped grooves, and the inner wall of the groove is treated with 0.5mm deep anti-slip texture.

[0079] In response to the specific size requirements of the project, the factory produced 2,000 splicing templates in advance. During the on-site installation, the workers first measured the spacing of the main frames with a tape measure and calculated the spacing according to the formula W. c =W g -2δ+∈ is calculated, the groove width W of the splicing template g Should be 27mm, the convex width W of the connecting plate c The installation gap δ is 26mm, the installation gap δ is controlled at 0.3mm, and the error ∈ is less than ±0.05mm. Then, the workers erected the splicing templates one by one on the fixing fixture of the main frame, and tightened the clamping bolts with a hand wheel to ensure that the pressure between the template and the pressure plate is around 0.8MPa. By adjusting the adjustment screw on the adjustment mechanism, the workers also accurately corrected the elevation and flatness of the adjacent templates to meet the formula The installation of the entire splicing template took about 3 days, which increased the efficiency by 50% compared with the traditional method.

[0080] In order to ensure the tightness between the templates, workers installed a T-shaped polyurethane elastomer sealing strip in the groove of each template. The surface of the sealing strip is coated with a 0.5mm thick silicone rubber waterproof coating. When the sealing strip is compressed by 50%, according to the formula Its sealing effect index E can reach 0.95, meeting the construction requirements on site. In order to further improve the locking force between the templates, workers installed a locking device on the connecting plate, including an M16×80mm hexagonal head locking bolt, a 120mm long locking plate and an M16 spring washer. When the locking bolt is rotated 3 / 4 of a turn, it can generate a locking force of about 4000N, which meets the formula F=F0e λφ +Kφ+σ.

[0081] 3. Installation of support structure

[0082] In order to ensure the stability of the entire formwork system, a set of diagonal brace support structures are installed at each of the four corners of the main frame. The diagonal brace is made of Φ60mm×4mm thick Q345b seamless steel pipe, with hinge joints at both ends, connected to the Φ100mm spherical connection node. There are 12 M16 threaded holes on the surface of the connection node for installing the diagonal brace. The diagonal brace is installed at a 45-degree angle, and the lower end is fixed to the ground with an M24 anchor bolt.

[0083] According to the formula When the inclination angle θ of the diagonal brace is less than 5 degrees, the stability index S of the entire support structure is greater than 0.95, the foundation stability S0 is 0.98, the gravity acceleration g is 9.8m / s^2, the dynamic load frequency ω is less than 2Hz, and the error term ψ is less than ±0.1. The installation of the entire support structure took a total of 1 day.

[0084] 4. On-site construction verification

[0085] After completing the installation of the main frame, splicing formwork and supporting structure, the engineering party organized professionals to conduct a comprehensive performance verification of the entire formwork system. First, by measuring the height difference and flatness of adjacent formworks, it was found that the maximum height difference was controlled within 2mm, and the flatness deviation was less than 1mm, meeting the design requirements. Then, water was sprinkled on the surface of the formwork for a leakage test, and it was found that there was almost no leakage within 48 hours, and the sealing effect was good. Finally, a static load of 300kN / m^2 was applied to the surface of the formwork. After 24 hours of monitoring, the maximum displacement of the supporting structure was only 1.2mm, and the overall stability performance was excellent.

[0086] Through the above field verification, the seamless splicing system of concrete formwork provided by the present invention fully meets the construction requirements of this large-scale rail transit project. Compared with traditional wooden formwork or steel formwork, this system has significant advantages in installation efficiency, sealing and stability. In the subsequent three-month concrete pouring phase, the formwork system played an important role, ensuring the smooth construction of various complex structures and greatly improving the quality and progress of the project.

[0087] Table 1 Technical parameters of main components

[0088]

[0089] Table 2 Main performance parameters

[0090]

[0091]

[0092] Through the above detailed description of the embodiments, it can be seen that the seamless splicing system of concrete formwork provided by the present invention has achieved remarkable results in solving the problems existing in the existing formwork splicing system. The system makes full use of key technical means such as precise dimensional design, adjustable fixing and positioning mechanism, reliable sealing and locking device, and stable support system, and has achieved excellent performance indicators in terms of installation efficiency, sealing and overall stability. It has been successfully applied in the actual construction of rail transit projects, providing an efficient and reliable formwork solution for complex construction projects.

[0093] Specifically, the principle of the present invention is:

[0094] 1. Precise size matching design The groove width W of the splicing template in this system g Width W of protrusion with connecting plate c There is a certain size relationship between them, which can be expressed as W c =W g -2δ+∈. Where δ is the installation gap and ∈ is the error term. Through precise measurement and optimized design, it can be ensured that δ is controlled at about 0.3mm and ∈ is less than ±0.05mm, so that the connecting plate can be accurately inserted into the groove of the template to achieve seamless docking. At the same time, the inner wall of the L-shaped groove around the edge of the template is also provided with anti-slip texture, which increases the bite force with the connecting plate and further improves the stability of the connection.

[0095] 2. Adjustable fixing and positioning mechanism This system uses the U-shaped clamp body and the column threaded hole to achieve rapid fixing of the spliced ​​template. The clamping bolt applies pressure to the template through the pressure plate, according to the formula The calculated pressure of about 0.8MPa ensures the stable installation of the template. The screw, adjustment block and locking nut in the adjustment mechanism form a precise positioning system. By rotating the adjustment screw to drive the adjustment block to move horizontally, the spliced ​​template can be fine-tuned to make the flatness and elevation of adjacent templates meet the requirements and conform to the formula Precision control in .

[0096] 3. Reliable sealing and locking mechanism In order to ensure good sealing between templates, this system uses a T-shaped elastic sealing strip. The vertical part of the sealing strip is inserted into the template groove, and the horizontal part is located between adjacent templates. According to the formula A sealing effect of 95% can be calculated. At the same time, a locking device is set on the connecting plate, which consists of a locking bolt, a locking plate and a spring washer. When the locking bolt is rotated 3 / 4 of a turn, a locking force of about 4000N can be generated to firmly fix the connecting plate in the template groove, which meets the formula F = F0e λφ +Kφ+σ. This sealing and locking mechanism ensures that the leakage problem between the templates is effectively solved.

[0097] 4. Stable support system The main frame of this system adopts a rigid structure of hollow columns and I-shaped beams. The adjustable support feet at the bottom of the columns can quickly eliminate uneven ground and provide a stable foundation for the entire formwork system. At the same time, a 45-degree diagonal brace structure is set at the four corners of the main frame to form an integrated support system. According to the formula When the inclination angle of the diagonal brace is less than 5 degrees, the stability index of the entire formwork structure is greater than 0.95, which can effectively resist the effects of dynamic loads and ensure the overall stability of the formwork system.

[0098] In summary, the seamless concrete formwork splicing system of the present invention solves the problems of low efficiency, poor sealing, unstable support, etc. existing in the existing formwork splicing system through precise size design, adjustable fixing and positioning mechanism, reliable sealing and locking device, and stable support system. All technical indicators have been optimized and quantitatively controlled, ensuring that the system can provide efficient, sealed, and stable formwork services in engineering applications, meeting the actual needs in complex construction environments.

[0099] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A seamless splicing system for concrete formwork, characterized in that: include: A main frame, a splicing template, a fixing fixture, an adjustment mechanism, a connecting plate, a locking device, a sealing strip and a supporting structure; the main frame is composed of a number of columns and beams to form a stable frame structure; the splicing template is a rectangular plate structure made of a high-strength alloy material, and grooves are provided on the four edges of the splicing template; the fixing fixture is installed on the columns of the main frame to fix the splicing template; the adjustment mechanism is installed on the fixing fixture to adjust the position of the splicing template; the connecting plate is a long strip structure with protrusions on both sides for inserting into the grooves of adjacent splicing templates to achieve seamless connection between templates; the locking device is installed on the connecting plate to firmly lock the connecting plate between the splicing templates; the sealing strip is installed in the groove of the splicing template to enhance the sealing between the templates; the supporting structure is installed at the bottom of the main frame to provide additional supporting force.

2. A seamless splicing system for concrete formwork according to claim 1, characterized in that: The columns of the main frame are hollow structures, with reinforcing ribs inside the columns and a number of evenly distributed threaded holes on the outer surface of the columns for installing fixing fixtures; the crossbeam is an I-shaped structure, with connecting plates at both ends of the beam, with through holes corresponding to the threaded holes of the columns on the connecting plates, and the crossbeam and the columns are fixedly connected by bolts; the bottom end of the column is provided with a support foot with adjustable height, the support foot consists of a threaded rod and a base, the threaded rod cooperates with the internal thread at the bottom of the column, and the height is adjusted by rotating the threaded rod.

3. A seamless splicing system for concrete formwork according to claim 2, characterized in that: The surface of the splicing template is coated with an anti-stick coating, which is composed of an epoxy resin and polytetrafluoroethylene composite material; the back of the splicing template is provided with reinforcing ribs, which are distributed in a grid pattern to enhance the rigidity of the template; the edge grooves around the splicing template are L-shaped, and the inner wall of the groove is provided with anti-slip texture to increase the friction with the connecting plate.

4. A seamless splicing system for concrete formwork according to claim 3, characterized in that: The fixing clamp includes a clamp body, a clamp bolt and a locking nut; the clamp body is a U-shaped structure, the opening of the U-shaped structure faces the splicing template, and the back of the U-shaped structure is provided with a long strip through hole corresponding to the threaded hole of the column, and the clamp body is fixed to the column by bolts; the clamping bolt passes through the two arms of the U-shaped structure, one end of the bolt is provided with a handle, and the other end is provided with a pressure plate, and the pressure plate is in contact with the splicing template; the locking nut is installed on the clamping bolt and is used to adjust and fix the position of the pressure plate.

5. A seamless splicing system for concrete formwork according to claim 4, characterized in that: The adjustment mechanism includes an adjusting screw, an adjusting block and a fixing nut; one end of the adjusting screw is hinged to the fixing fixture, and the other end passes through the adjusting block; the adjusting block is a rectangular structure, the center of which is provided with a threaded hole matching the adjusting screw, and one side of the adjusting block is in contact with the splicing template; the fixing nut is installed at the end of the adjusting screw to lock the position of the adjusting block; by rotating the adjusting screw, the adjusting block moves in the horizontal direction, thereby adjusting the position of the splicing template.

6. A seamless splicing system for concrete formwork according to claim 5, characterized in that: The cross-section of the connecting plate is an I-shaped structure, and the raised parts on both sides of the I-shaped structure match the grooves of the splicing template; the material of the connecting plate is high-strength alloy steel, and the surface is hardened to increase wear resistance; the length of the connecting plate is equal to the side length of the splicing template, and the width is slightly smaller than the total width of the grooves of two adjacent splicing templates, so as to facilitate installation and disassembly.

7. A seamless splicing system for concrete formwork according to claim 6, characterized in that: The locking device includes a locking bolt, a locking plate and a spring washer; the locking bolt passes through a through hole reserved on the connecting plate, and a hexagonal groove is provided on the bolt head for easy tightening using a tool; the locking plate is a long strip structure, with a threaded hole matching the locking bolt in the middle, and both ends of the locking plate extend into the grooves of adjacent splicing templates respectively; the spring washer is installed between the locking bolt and the connecting plate to maintain the locking force and prevent the bolt from loosening.

8. A seamless splicing system for concrete formwork according to claim 7, characterized in that: The sealing strip is made of an elastomeric material and has a T-shaped cross-section. The vertical portion of the T-shaped structure is inserted into the groove of the splicing template, and the horizontal portion is located between two adjacent splicing templates. The surface of the sealing strip is coated with a waterproof coating, which is composed of a silicone rubber material. Chamfers are provided on both sides of the sealing strip to reduce stress concentration and improve the sealing effect.

9. A seamless splicing system for concrete formwork according to claim 8, characterized in that: The supporting structure includes a diagonal brace, a connecting node and an anchor bolt; the diagonal brace is a hollow circular tube structure with hinge joints at both ends; the connecting node is a spherical structure with a plurality of threaded holes on the surface for connecting the diagonal brace and the columns of the main frame; the anchor bolt is installed at the lower end of the diagonal brace to fix the supporting structure to the ground; the diagonal brace is installed at a 45-degree angle, and a group of supporting structures is arranged at the corners of each main frame to provide all-round supporting force.

10. A seamless splicing system for concrete formwork according to claim 9, characterized in that: The relationship between the groove width of the splicing template and the protrusion width of the connecting plate is defined by the following relationship definition equation: c =W g -2δ+∈; where W c W is the width of the connecting plate protrusion; g is the groove width of the splicing template; δ is the installation gap; v is the error term; the relationship between the compression deformation of the sealing strip and the sealing effect can be expressed as follows: Where, E is the sealing effect index (between 0 and 1); η is the material property coefficient; Δh is the compression deformation; h0 is the original height of the sealing strip; m is the power coefficient; ξ is the error term.

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