Assembled pier column non-dismantling formwork

Abstract

The present invention relates to the technical field of building structures. Disclosed is an assembled pier column non-dismantling formwork. The assembled pier column non-dismantling formwork comprises arc-shaped assembly blocks, wherein at least two arc-shaped assembly blocks are assembed in sequence in a circumferential direction to form cylindrical units, and several cylindrical units are assembled in sequence in a longitudinal direction; bosses which are uniformly distributed are provided on the inner wall of the arc-shaped assembly block, the bosses at interfaces of adjacent arc-shaped assembly blocks are provided with truncated cone-shaped annular fasteners or combined fasteners, the truncated cone-shaped annular fasteners or the combined fasteners are connected to L-shaped fasteners, and the adjacent L-shaped fasteners are connected by means of tie bars; and the L-shaped fasteners are fixed to the arc-shaped assembly blocks by means of connectors. The present invention ensures the stability and stress performance of the cylindrical formwork, and effectively improves the lateral pressure resistance and deformation resistance of a formwork system during a concrete pouring process.

Description

A prefabricated pier column formwork that does not require disassembly

[0001] Cross-reference to related applications

[0002] This invention claims priority to Chinese Patent Application No. 202411447301.9, filed with the China National Intellectual Property Administration on October 16, 2024, entitled "A Prefabricated Pier Column Removable Template", the entire contents of which are incorporated herein by reference and constitute a part of this invention for all purposes. Technical Field

[0003] This invention relates to the field of building structure technology, and in particular to a prefabricated pier column formwork that does not require disassembly. Background Technology

[0004] Unlike typical rectangular formwork, circular building column formwork is mostly custom-made metal formwork. Traditional metal formwork is durable and can withstand high pressure, but it may corrode over time and is not fire-resistant, requiring more manpower for handling and installation. Traditional wooden formwork, on the other hand, is less robust and may require more frequent replacement; it is also easily damaged by moisture. While wooden formwork uses renewable natural resources, its environmental impact may be higher due to the need for frequent replacement. Currently, formwork-free technology has become a hot topic in the construction industry because it simplifies construction processes, improves efficiency, and reduces material waste and construction debris, aligning with green building and sustainable development principles. However, in practical applications, existing formwork-free systems still face some challenges, such as:

[0005] Chinese utility model patent CN215210490U discloses a tenon-and-mortise combined ultra-high performance concrete permanent formwork, including a first arc-shaped permanent column formwork and a second arc-shaped permanent column formwork. The first arc-shaped permanent column formwork and the second arc-shaped permanent column formwork can be spliced ​​together. The first arc-shaped permanent column formwork has a first tenon on one side and a first mortise on the other side. The second arc-shaped permanent column formwork has a second tenon on one side and a second mortise on the other side. The reserved holes in this scheme are difficult to use for both pouring and demolding. Furthermore, the reserved holes are prone to cracking at the tongue and groove joints when the bolts are tightened or when holes are drilled later.

[0006] Chinese invention patent CN118668866A discloses a quick-assembly high-resistance column formwork that does not require disassembly. The assembly blocks of the formwork are arc-shaped, and four arc-shaped blocks are assembled into a circular formwork on the same level. The assembly joints of this solution are only connected by grooved fasteners and bolts, and the entire column structure has no internal support, resulting in insufficient formwork rigidity. Furthermore, the inner side of the formwork is designed with closely spaced ribs. When it is necessary to adjust the horizontal dimension of the formwork on site, since the formwork only has one half-toothed rib for hooking in the vertical direction, the cross-sectional dimension of the formwork cannot be adjusted by cutting. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a prefabricated pier column formwork that does not require disassembly. By using L-shaped fasteners, frustum-shaped fasteners, or combination fasteners in conjunction with tie bars and connectors, the arc-shaped assembly blocks are connected, ensuring the stability and load-bearing performance of the column formwork and effectively improving the formwork system's resistance to lateral pressure and deformation during concrete pouring.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0009] An embodiment of the present invention provides a prefabricated pier column template that does not require disassembly, comprising arc-shaped assembly blocks, at least two arc-shaped assembly blocks being spliced ​​together circumferentially to form columnar units, and several columnar units being spliced ​​together longitudinally; the inner wall of the arc-shaped assembly blocks is provided with evenly distributed bosses, and the bosses at the joints of adjacent arc-shaped assembly blocks are fitted with frustum-shaped ring fasteners or combined fasteners, the frustum-shaped ring fasteners or combined fasteners being connected to L-shaped fasteners, and adjacent L-shaped fasteners being connected by tie bars; the L-shaped fasteners and the arc-shaped assembly blocks are fixed by connectors.

[0010] As a further implementation, when the cylindrical unit contains more than three arc-shaped assembly blocks, tie bars are connected between each of the L-shaped fasteners opposite to one of the L-shaped fasteners to form several triangular structures.

[0011] As a further implementation, the arc-shaped assembly block has a half-protrusion at the joint and a quarter-protrusion at the corner; the quarter-protrusion and its surrounding quarter-protrusion, and the half-protrusion and its adjacent half-protrusion are spliced ​​together to form a complete protrusion.

[0012] A frustum-shaped fastener or a combination fastener is installed at the splicing position of the quarter boss; or, a frustum-shaped fastener or a combination fastener is installed at the splicing position of the half boss at a set position.

[0013] As a further implementation, the semi-protrusion has a semi-sunken hole, and the quarter-protrusion has a quarter-sunken hole.

[0014] The semi-sunken hole and its mating semi-sunken hole, and the quarter-sunken hole and its surrounding quarter-sunken holes respectively form a combination hole, and the connector passes through the combination hole to connect with the L-shaped fastener.

[0015] As a further implementation, the combined fastener includes a strip-shaped component and an open component located in the middle of the strip-shaped component. The open component is nested within a boss at the splicing point, and a boss is nested at each end of the strip-shaped component.

[0016] As a further implementation, the open part is a non-closed structure, and its inner surface is adapted to the outer surface of the boss.

[0017] As a further implementation, the L-shaped fastener has a first mounting surface and a second mounting surface that are perpendicular to each other, wherein the first mounting surface is provided with a plurality of tie bar holes and the second mounting surface is provided with bolt holes.

[0018] As a further implementation, the edge of the arc-shaped assembly block is provided with a trapezoidal groove or trapezoidal rib, and the trapezoidal groove and trapezoidal rib of the adjacent arc-shaped assembly block are inserted into each other.

[0019] As a further implementation, the arc-shaped assembly block is provided with a steel mesh.

[0020] As a further implementation, the arc-shaped assembly block is made of UHPC or ECC material, and the L-shaped fastener, frustum-shaped fastener, and combination fastener are made of stamped high-strength carbon steel.

[0021] An embodiment of the present invention also provides a prefabricated pier column template that does not require disassembly, comprising arc-shaped assembly blocks, at least two arc-shaped assembly blocks being spliced ​​together circumferentially to form column units, and several column units being spliced ​​together longitudinally; the inner wall of the arc-shaped assembly blocks is provided with uniformly distributed bosses, and double-reinforced composite connectors are installed on the bosses at the joints of adjacent arc-shaped assembly blocks, the double-reinforced composite connectors being connected to the bosses at the joints by reinforcement anchor fasteners; the double-reinforced composite connectors are connected by tie bars at predetermined intervals.

[0022] As a further implementation, the double-ribbed composite connector includes a transverse reinforcing rib and a conical sleeve fastener, the conical sleeve fastener being used to engage with the boss, and the conical sleeve fastener being fixed between the two transverse reinforcing ribs;

[0023] The reinforcing bar anchor fastener includes a first mounting surface and a second mounting surface that are perpendicular to each other. The first mounting surface is provided with a plurality of tie bar holes, and the second mounting surface is provided with a bolt hole in the middle. Hanging holes are provided on the lower side of the bolt hole, and the hanging holes are used to cooperate with the tie bars.

[0024] As a further implementation, the transverse reinforcing rib is long and has the same curvature as the assembly block; both ends of the transverse reinforcing rib are provided with end hooks.

[0025] As a further implementation, the double-rib combined connector also includes longitudinal rib anchoring fasteners, which are used to fix the longitudinal ribs, which are symmetrically arranged on both sides of the boss.

[0026] The beneficial effects of this invention are as follows:

[0027] (1) The L-shaped fastener of the present invention is used in combination with the frustum ring fastener or the combination fastener to realize automatic alignment and clamping between connected assembly blocks. At the same time, the L-shaped fasteners are connected by tie bars to realize the opposing tie between the template structures, which enhances the overall stability of the template. Meanwhile, during the concrete pouring process, the tie bars can offset the internal pressure of the grout, preventing the template from bulging or collapsing. This improves construction efficiency and quality, and can also reduce the later maintenance cost.

[0028] (2) The present invention utilizes the combination hole and corresponding fastener structure to achieve a fast, simple and stable connection; during on-site installation, it is only necessary to perform preliminary assembly of the assembly blocks, and then use bolts to pass through the combination hole from the outside of the assembly block and anchor it tightly to the L-shaped fastener. During the process, the arc-shaped assembly blocks are automatically squeezed together. The design of the insert groove meets the structural requirements, while also taking into account aesthetics and safety; for multiple assembled arc-shaped assembly blocks, tie bars are added at the diagonal to form a stable triangular structure, further ensuring structural stability; for the combination fastener, multiple bosses can be nested at the same time to enhance the strength of the splice joint.

[0029] (3) The present invention uses a reinforcing anchor fastener and a reinforcing anchor fastener in combination with tie bars. The double-rib combination connector and the reinforcing anchor fastener form a closed loop to further increase the integrity of the template and the hoop performance, increase the reliability of the template, and increase the combination performance of the template and the inner core structure. Each layer of tie bars connects each bolt anchor point in an interlaced mesh manner to enhance the overall stability of the template.

[0030] (4) The inner wall of the assembly block of the present invention is provided with evenly distributed protrusions. The size of the template can be flexibly adjusted to the size of the template unit by cutting along the center line of each row or column of protrusions. In addition to the hook connection function in the template surface, the protrusions also serve as the connection function between the template and the post-poured concrete, so that the template and the post-poured concrete can better coordinate the stress. The connection between the assembly blocks is more firm and reliable. Attached Figure Description

[0031] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0032] Figure 1A is a partial explosion and enlarged schematic diagram of Embodiment 1 of the present invention;

[0033] Figure 1B is a partial assembly schematic diagram of Embodiment 1 of the present invention;

[0034] Figure 1C is a partial cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0035] Figure 1D is a cross-sectional schematic diagram of the fastener connection in Embodiment 1 of the present invention;

[0036] Figure 1E is a schematic diagram of the overall assembly of Embodiment 1 of the present invention;

[0037] Figure 2A is a schematic diagram of the tenon-and-mortise assembly block of Embodiment 2 of the present invention;

[0038] Figure 2B is a partial assembly and exploded view of Embodiment 2 of the present invention;

[0039] Figure 3A is a schematic diagram of the reinforced assembly block of Embodiment 3 of the present invention;

[0040] Figure 3B is a partial explosion and enlarged schematic diagram of Embodiment 3 of the present invention;

[0041] Figure 3C is a partial assembly schematic diagram of Embodiment 3 of the present invention;

[0042] Figure 4A is a partial explosion and enlarged schematic diagram of Embodiment 4 of the present invention;

[0043] Figure 4B is a partial assembly schematic diagram of Embodiment 4 of the present invention;

[0044] Figure 4C is a partial cross-sectional schematic diagram of Embodiment 4 of the present invention;

[0045] Figure 4D is a partial assembly schematic diagram of Embodiment 4 of the present invention;

[0046] Figure 5 is a structural schematic diagram of Embodiment 5 of the present invention;

[0047] Figure 6A is a partial explosion and enlarged schematic diagram of Embodiment 6 of the present invention;

[0048] Figure 6B is a schematic diagram of the overall assembly of Embodiment 6 of the present invention.

[0049] Among them, 10. Arc-shaped assembly block; 101. Boss; 102. Half boss; 103. Quarter boss; 104. Half groove; 105. Quarter groove; 106. Half insert groove; 107. Quarter insert groove; 108. Combination hole; 11. Tenon and mortise assembly block; 111. Trapezoidal rib; 112. Trapezoidal groove; 12. Reinforced assembly block; 121. Steel mesh;

[0050] 21. L-shaped fastener; 211. Tie bar hole; 212. Bolt hole; 22. Frustum ring fastener; 23. Bolt; 24. Tie bar; 25. Combination fastener; 251. Strip member; 252. Open member;

[0051] 31. Reinforcing bar anchor fastener; 311. Hanging hole; 32. Double reinforcing bar combination connector; 321. Transverse reinforcing bar; 322. Conical sleeve fastener; 323. End hook; 33. Longitudinal reinforcing bar anchor fastener; 331. Buckle; 332. Anchor bolt hole; 34. Longitudinal reinforcing bar. Detailed Implementation

[0052] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0053] Example 1:

[0054] This embodiment provides a prefabricated pier column template that does not require disassembly, as shown in Figures 1A-1E. It includes multiple arc-shaped assembly blocks 10. At least two arc-shaped assembly blocks 10 are joined circumferentially to form a columnar unit, and several columnar units are sequentially joined longitudinally to form a cylindrical template with a certain height. The number of arc-shaped assembly blocks 10 in each columnar unit depends on the actual construction requirements; it can be two arc-shaped assembly blocks 10 joined together, or three, four, or more arc-shaped assembly blocks 10 joined together. The arc-shaped assembly blocks 10 are connected by frustum-shaped ring fasteners 22, L-shaped fasteners 21, and connectors.

[0055] Adjacent L-shaped fasteners 21 are connected by tie bars 24. When the columnar unit contains more than three arc-shaped assembly blocks 10, in order to further ensure the stability of the structure, tie bars 24 are added between one of the L-shaped fasteners 21 and each of the L-shaped fasteners 21 opposite to it to form a triangular structure.

[0056] The inner surface of the arc-shaped assembly block 10 is uniformly provided with protrusions 101, which are distributed in multiple rows and columns. The protrusions 101 enhance the stability of the arc-shaped assembly block 10 structure and provide a reference for the assembly process. In this embodiment, the protrusion 101 is a frustum structure, that is, the longitudinal section of the protrusion 101 is an isosceles trapezoid and the cross section is a circle.

[0057] Each arc-shaped assembly block 10 has a semi-protrusion 102 on its four edges and a quarter-protrusion 103 at its four corners. When two adjacent arc-shaped assembly blocks 10 are assembled, the semi-protrusions 102 can be seamlessly connected to form a complete protrusion 101. The quarter-protrusions 103 at the corners form a semi-protrusion 102. When each cylindrical unit is assembled with other cylindrical units, the two assembled semi-protrusions 102 form a complete protrusion 101.

[0058] Each corner assembly forms a complete boss 101, on which frustum-shaped fasteners 22 and L-shaped fasteners are installed. Connectors pass through the arc-shaped assembly blocks 10 and connect to the L-shaped fasteners. In this embodiment, the connector is a bolt 23. To ensure connection strength and stability, the complete boss 101, formed by assembling the semi-bodies 102 at a certain height on the joint surface of the arc-shaped assembly blocks 10, is also equipped with frustum-shaped fasteners 22, L-shaped fasteners, and connectors.

[0059] To install bolts 23 and other connecting parts, semi-counter-sunken holes are provided at the corresponding semi-protrusions 102 and quarter-counter-sunken holes are provided at the corresponding quarter-protrusions 103. The axes of the semi-counter-sunken holes and quarter-counter-sunken holes are perpendicular to the plate surface. Specifically, semi-insertion grooves 106 and semi-grooves 104 are sequentially formed from the inside of the semi-protrusions 102, and the connected semi-insertion grooves 106 and semi-grooves 104 form a semi-counter-sunken hole; the quarter-protrusions 103 at the corners are sequentially formed from the outside to the inside with quarter-insertion grooves 107 and quarter-grooves 105, and the connected quarter-insertion grooves 107 and quarter-grooves 105 form a quarter-counter-sunken hole; the semi-counter-sunken hole and its corresponding other semi-counter-sunken hole, and the quarter-counter-sunken hole and its three corresponding quarter-counter-sunken holes on the periphery, respectively form combination holes 108. The above structure achieves a neat and beautiful appearance on the outer surface after installation, eliminates the safety hazards and visual disharmony that may be caused by exposed bolt heads, ensures the stability of the structure, and facilitates assembly and fixing.

[0060] As shown in Figures 1A-1D, the L-shaped fastener 21 can be formed by pressing steel plate. It includes a first mounting surface and a second mounting surface that are perpendicular to each other. The first mounting surface has several tie bar holes 211, and the second mounting surface has bolt holes 212. The bolt holes 212 correspond to the combination holes 108 and are used to install bolts 23. The tie bar holes 211 are used to install tie bars 24. With reference to the direction shown in the figure, the first mounting surface is a horizontal plane, and the second mounting surface is a vertical plane. The frustum-shaped fastener 22 is formed by pressing steel plate and can be nested on the combined boss 101. The tie bar 24 is a U-shaped connecting bar, and its length can be designed according to the actual situation.

[0061] In this embodiment, a cylindrical unit containing four arc-shaped assembly blocks 10 is used as an example. As shown in Figure 1B, each adjacent L-shaped fastener 21 is connected by a tie bar 24, and a total of four tie bars 24 form a quadrilateral structure. A tie bar 24 is connected between two L-shaped fasteners 21 at one diagonal. The tie bar 24 and the quadrilateral structure are supported together in the cylindrical unit, increasing the connection stability of the arc-shaped assembly blocks 10.

[0062] In this embodiment, the arc-shaped assembly block 10 is made of high-toughness fiber-reinforced cement-based material such as UHPC and ECC, the L-shaped fastener 21 and the frustum-shaped fastener 22 are made of stamped high-strength carbon steel, and the bolts 23 are made of corrosion-resistant metals such as stainless steel or aluminum.

[0063] During installation, a frustum-shaped fastener 22 is nested on the boss 101 formed by the two halves of the boss 102 or the four quarters of the boss 103 at the joint of adjacent arc-shaped assembly blocks 10. Then, an L-shaped fastener 21 is installed on the outside of the frustum-shaped fastener 22. Through the tightening and wedging of the bolts 23, the two halves of the boss 102 or the four quarters of the boss 103 at the joint are automatically squeezed together, reducing the gap of the assembly joint and increasing the compactness of the assembly blocks. Finally, tie bars 24 are installed at the tie bar holes 211 on the upper part of the L-shaped fastener 21. The tie bars 24 on the same plane form two stable triangles, realizing the mutual tethering between the template structures. After that, the tie bars 24 play a key role in the concrete pouring process, effectively resisting lateral pressure and deformation, and ensuring that the template will not shift or deform. At the same time, this tethering method also significantly enhances the connection strength between the template and the concrete, thereby improving the stability and durability of the overall structure.

[0064] After the formwork is installed, concrete is poured in. Once it has cured and been fully maintained, the formwork and concrete are permanently bonded together and become part of the structure. There is no need to remove it, thus achieving the permanent use of the formwork.

[0065] In summary, this embodiment uses arc-shaped assembly blocks 10, frustum-shaped fasteners 22, and L-shaped fasteners 21. During on-site installation, the arc-shaped assembly blocks 10 only need to be assembled into an integral template, and bolts 23 are used to pass through the combination hole 108 and the threaded bolt hole 212 of the L-shaped fastener 21 for anchoring. During this process, the frustum-shaped fasteners 22 will automatically and tightly connect each arc-shaped assembly block 10, making the installation both simple and quick.

[0066] Example 2:

[0067] This embodiment provides a prefabricated pier column template that does not require disassembly. Compared with embodiment 1, the difference in this embodiment is that it adopts mortise and tenon joint assembly blocks 11, as shown in Figures 2A and 2B. Trapezoidal ribs 111 or trapezoidal grooves 112 are respectively provided on the joint of the mortise and tenon joint assembly blocks 11. The trapezoidal ribs 111 and trapezoidal grooves 112 of adjacent mortise and tenon joint assembly blocks 11 are inserted and assembled. The trapezoidal ribs 111 and trapezoidal grooves 112 are tightly engaged to avoid grout leakage during pouring.

[0068] In this embodiment, trapezoidal ribs 111 are evenly spaced on one side of the tenon-joint assembly block 11 and are in the shape of a truncated pyramid with an isosceles trapezoidal cross-section. Trapezoidal grooves 112 are evenly spaced on the other side of the tenon-joint assembly block 11 and are also in the shape of a truncated pyramid with an isosceles trapezoidal cross-section, corresponding to the trapezoidal ribs 111. The upper and lower sides of the tenon-joint assembly block 11 are provided with trapezoidal ribs 111 or trapezoidal grooves 112 in the same manner.

[0069] During assembly, the trapezoidal ribs 111 and trapezoidal grooves 112 are aligned, with the trapezoidal ribs 111 directly embedded in the trapezoidal grooves 112. Simultaneously, each semi-protrusion 102 forms a complete protrusion 101, and the semi-circular grooves 104 are aligned and assembled to form a combined hole 108. As described in Embodiment 1, the frustum-shaped fastener 22 is nested on the assembled protrusion 101. Bolts 23 are used to pass through the combined hole 108 and the bolt holes 212 on the L-shaped fastener 21 for fixation. After the bolts 23 are tightened and wedged into place, tie bars 24 are installed at the tie bar holes 211 of the L-shaped fastener 21, achieving mutual tethering between the template structures.

[0070] Example 3:

[0071] This embodiment provides a prefabricated pier column template that does not require disassembly, as shown in Figures 3A-3C. Compared with Embodiment 1, the difference in this embodiment is that a reinforced assembly block 12 is used, which is formed by setting a steel mesh 121 inside the arc-shaped assembly block 10; this can improve the strength of the assembly block.

[0072] Example 4:

[0073] This embodiment provides a prefabricated pier column template that does not require disassembly, as shown in Figures 4A-4D. Compared with Embodiment 1, the difference in this embodiment is that the combined fastener 25 replaces the frustum-shaped fastener 22 in Embodiment 1, and the arc-shaped assembly block 10 or the reinforced assembly block 12 can be used.

[0074] Specifically, the combination fastener 25 is formed by pressing steel plate and includes a strip 251 and an open part 252. The strip 251 has the same curvature as the assembly block and is long and narrow. The two ends of the strip 251 are rounded to fit the boss 101 and are nested on the complete boss 101 near the edge. The open part 252 is fixed in the middle of the strip 251. It is similar to the frustum ring fastener 20, but it is a non-connected closed structure. That is, it adopts an arc-shaped structure that adapts to the shape of the boss 101 and has an opening. The open part 252 can be nested on the assembled boss 101.

[0075] This embodiment uses reinforced assembly block 12 as an example for detailed explanation:

[0076] During installation, a combination fastener 25 is nested on the boss 101 formed by the two halves of the boss 102 or four quarter bosses 103 of the joint of the adjacent reinforced assembly blocks 12. The combination fastener 25 can also encompass the bosses 101 of the adjacent reinforced assembly blocks 12 near the joint, that is, one combination fastener 25 can nest three bosses 101 at the same time, forming an interlaced connection with the internal steel mesh 121, thereby enhancing the strength of the joint and improving the overall strength of the formwork.

[0077] Then, an L-shaped fastener 21 is installed on the outside of the combination fastener 25. Through the tightening and wedging of the bolt 23, the two halves of the boss 102 or the four quarter bosses 103 of the splice seam are automatically squeezed together, reducing the gap of the splice seam and increasing the compactness of the splice block. Finally, tie bars 24 are installed at the tie bar holes 211 on the upper part of the L-shaped fastener 21. The tie bars 24 on the same plane form two stable triangles, realizing the mutual tethering between the template structures.

[0078] This embodiment utilizes the design of combining L-shaped fasteners 21 and combination fasteners 25. During assembly, the two halves of the protrusions 102 or the four quarter protrusions 103 of the splice seam are automatically squeezed together, reducing the gap of the splice seam and increasing the compactness of the splice blocks. The tie bar holes 211 of the L-shaped fasteners 21 cleverly integrate the installation function of tie bars, realizing the mutual tethering between the template structures, effectively improving the template system's resistance to lateral pressure and deformation during concrete pouring, and ensuring the stability and safety of the pouring process.

[0079] Example 5:

[0080] This embodiment provides a prefabricated pier column template that does not require disassembly, as shown in Figure 5. Compared with embodiment 4, the difference in this embodiment is that the L-shaped fastener 21 in embodiment 4 is replaced by the reinforcing anchor fastener 31 for anchoring, and the combination fastener 25 in embodiment 4 is replaced by the double-reinforced combination connector 32. The assembly block can be an arc-shaped assembly block 10 or a reinforced assembly block 12.

[0081] Specifically, the reinforcing anchor fastener 31 can be formed by pressing steel plate, and includes a first mounting surface and a second mounting surface that are perpendicular to each other. The second mounting surface is the mating surface of the boss 101. The first mounting surface is provided with multiple tie bar holes 211, and the second mounting surface is provided with a bolt hole 212 in the middle. An elliptical hook hole 311 is provided on the upper and lower sides of the bolt hole 212. The bolt hole 212 corresponds to the combination hole 108 and is used to install bolts 23 to realize the connection between the reinforcing anchor fastener 31 and the assembly block. The tie bar hole 211 is a round hole and is used to install tie bars 24. In this embodiment, eight reinforcing anchor fasteners 31 are installed in the same plane of the column unit. Each reinforcing anchor fastener 31 is connected by tie bars 24 at intervals to form two staggered quadrilateral structures.

[0082] The double-ribbed composite connector 32 includes a transverse reinforcing rib 321 and a conical sleeve fastener 322. The two transverse reinforcing ribs 321 are symmetrically fixed on the upper and lower sides of the conical sleeve fastener 322, with the conical sleeve fastener 322 located in the middle of the transverse reinforcing ribs 321. The transverse reinforcing rib 321 is generally elongated and has the same curvature as the assembly block. Both ends of the transverse reinforcing rib 321 are provided with end hooks 323, which are bent from the ends of the transverse reinforcing rib 321 to form a hook-like structure, and are used to match and hook with the elliptical hook holes 311 of the rib-connecting anchor fastener 31.

[0083] To enhance the lateral connection performance of the assembled blocks, the conical sleeve fastener 322 in the double-ribbed composite connector 32 is preferentially nested on the complete boss formed by the double assembly seam and four quarter-sized bosses 103. Through the tightening force between the bolt 23 and the bolt hole 212 in the ribbed anchoring fastener 31, the conical sleeve fastener 322 tightly grips the completed boss, thus locking the assembled blocks on both sides of the horizontal and vertical assembly seams. The end hooks 323 at one end of each of the two double-ribbed composite connectors 32 are connected by a ribbed anchoring fastener 31. These hooks are anchored together with a frustum-shaped fastener 22 nested in the two half-sized bosses 102 by bolts 23, locking the upper and lower assembled blocks of the horizontal joint. The four sets of double-ribbed composite connectors 32 and ribbed anchoring fasteners 31 form a closed loop, further increasing the integrity and clamping performance of the template, enhancing the reliability of the template, and improving the combination performance of the template and the inner core structure.

[0084] Example 6:

[0085] This embodiment provides a prefabricated pier column template that does not require disassembly, as shown in Figures 6A and 6B. The difference between this embodiment and embodiment 5 is that a set of longitudinal bars 34 is added at each bar anchor fastener 31 position. Each set consists of two bars, which are arranged on both sides of the boss 101. The longitudinal bars 34 are fixed by the longitudinal bar anchor fastener 33.

[0086] The longitudinal reinforcement anchor fastener 33 includes a fastener body, which is a planar structure parallel to the second mounting surface of the reinforcement anchor fastener 31. The fastener body has a buckle 331 at both ends, which is a U-shaped structure with an opening facing the side where the reinforcement anchor fastener 31 is located. The longitudinal reinforcement 34 is fixed by the buckle 331.

[0087] The main body of the longitudinal reinforcement anchor fastener 33 is provided with anchor bolt holes 332, which are anchored to bolts 23. The longitudinal reinforcement 34 enhances the longitudinal connection performance of the formwork unit and increases the lateral bending resistance of the formwork and pier structure. Each tie bar 24 is spaced apart to connect to the tie bar holes 211 on two reinforcement anchor fasteners 31. Each layer of tie bars connects the bolt anchor points in a staggered network manner to enhance the overall stability of the formwork.

[0088] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A prefabricated pier column formwork, characterized in that, The assembly includes arc-shaped modular blocks, with at least two arc-shaped modular blocks joined together circumferentially to form a columnar unit, and several columnar units joined together longitudinally. The inner wall of each arc-shaped modular block has evenly distributed bosses. At the joint of adjacent arc-shaped modular blocks, a frustum-shaped ring fastener or a combination fastener is installed on the bosses. The frustum-shaped ring fastener or combination fastener is connected to an L-shaped fastener, and adjacent L-shaped fasteners are connected by tie bars. The L-shaped fasteners are fixed to the arc-shaped modular blocks by connectors.

2. A prefabricated pier column formwork, characterized in that, It includes arc-shaped assembly blocks, at least two arc-shaped assembly blocks are spliced ​​together in the circumferential direction to form a columnar unit, and several columnar units are spliced ​​together in the longitudinal direction; the inner wall of the arc-shaped assembly block is provided with evenly distributed bosses, and double-ribbed combination connectors are installed on the bosses at the joint of adjacent arc-shaped assembly blocks. The double-ribbed combination connectors are connected to the bosses at the joint through ribbed anchor fasteners; a set number of double-ribbed combination connectors are connected by tie bars at intervals.

3. The assembled pier column formwork according to claim 1, characterized in that, When the cylindrical unit contains more than three arc-shaped assembly blocks, tie bars are connected between each of the L-shaped fasteners opposite to one of the L-shaped fasteners to form several triangular structures.

4. The assembled pier column formwork according to claim 1 or 3, characterized in that, The combined fastener includes a strip-shaped component and an open component located in the middle of the strip-shaped component. The open component is nested within a boss at the splicing point, and a boss is nested at each end of the strip-shaped component.

5. The assembled pier column formwork according to claim 4, wherein, The open part is a non-closed structure, and its inner surface is adapted to the outer surface of the boss.

6. A prefabricated pier column formwork that does not require disassembly, as described in claim 1 or 3, is characterized in that... The L-shaped fastener has a first mounting surface and a second mounting surface that are perpendicular to each other, wherein the first mounting surface is provided with a plurality of tie bar holes and the second mounting surface is provided with bolt holes.

7. The prefabricated pier column formwork that does not require dismantling according to claim 2, characterized in that, The double-ribbed composite connector includes a transverse reinforcing rib and a conical sleeve fastener. The conical sleeve fastener is used to engage with the boss and is fixed between the two transverse reinforcing ribs. The reinforcing bar anchor fastener includes a first mounting surface and a second mounting surface that are perpendicular to each other. The first mounting surface is provided with a plurality of tie bar holes, and the second mounting surface is provided with a bolt hole in the middle. Hanging holes are provided on the lower side of the bolt hole, and the hanging holes are used to cooperate with the tie bars.

8. The assembled pier column formwork according to claim 7, characterized in that, The transverse reinforcing rib is long and has the same curvature as the assembly block; both ends of the transverse reinforcing rib are provided with end hooks.

9. The assembled pier column formwork according to claim 7 or 8, characterized in that, The double-ribbed assembly connector also includes longitudinal rib anchoring fasteners, which are used to fix the longitudinal ribs, which are symmetrically arranged on both sides of the boss.

10. The prefabricated pier column formwork according to claim 1 or 2, characterized in that, The arc-shaped assembly block has a semi-protrusion at the joint and a quarter-protrusion at the corner; the quarter-protrusion and its surrounding quarter-protrusion, and the semi-protrusion and its adjacent semi-protrusion are spliced ​​together to form a complete protrusion.

11. The prefabricated pier column formwork according to claim 10, characterized in that, The semi-protrusion has a semi-sunken hole, and the quarter-protrusion has a quarter-sunken hole; The semi-sunken hole and its mating semi-sunken hole, and the quarter-sunken hole and its surrounding quarter-sunken holes respectively form a combination hole, and the connector passes through the combination hole to connect with the assembly block.

12. The assembled pier column formwork according to claim 1 or 2, wherein, The edge of the arc-shaped assembly block is provided with a trapezoidal groove or trapezoidal rib, and the trapezoidal groove and trapezoidal rib of the adjacent arc-shaped assembly block are inserted into each other.

13. The assembled pier column formwork according to claim 1 or 2, wherein, The arc-shaped assembly block is equipped with a steel mesh.

14. The prefabricated pier column formwork according to claim 1 or 2, characterized in that, The arc-shaped assembly blocks are made of UHPC or ECC material, while the L-shaped fasteners, frustum-shaped fasteners, and combination fasteners are made of stamped high-strength carbon steel.

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