Concrete interface connection forming device

Abstract

According to the concrete interface connection forming device, a small amount of ultra-high performance concrete (UHPC) slurry is allowed to seep through preset holes, a natural rough interface is formed with common concrete, the binding force of the UHPC slurry and the common concrete is enhanced, a leakage-proof baffle prevents excessive loss of the UHPC through physical blocking, and meanwhile steel fibers are allowed to partially extend outwards but not completely disengage; the shell nosing plate and the support are fixed in a clamping mode, the support provides stable supporting, the clamping structure simplifies the installation process, complex bolts or welding is not needed, the construction difficulty is reduced, the support enhances the overall rigidity, and it is ensured that the shell nosing plate does not displace or deform in the pouring process. At least part of the steel fiber is arranged in the preset hole and the slurry containing space, leakage of the steel fiber is limited through the leakage-proof baffle, the steel fiber is limited in the preset hole and the slurry containing space, it is ensured that the steel fiber is distributed at the interface, the extending part of the steel fiber is embedded into common concrete, mechanical engagement is formed, and the shearing resistance of the interface is improved.

Description

Technical Field

[0001] This application relates to the field of concrete interface bonding, and specifically to a concrete interface bonding molding device. Background Technology

[0002] The interface bonding molding process between ultra-high performance concrete (UHPC) and ordinary concrete refers to the use of specific technical means to ensure that UHPC and ordinary concrete form a strong and stable connection at the interface, thereby enabling them to work together and meet structural performance requirements.

[0003] In related technologies, the construction process requires first installing formwork to pour one side of the UHPC, then removing the formwork after initial setting, and then proceeding with the construction of the other side of the concrete. After the construction is completed, the formwork is removed again. In terms of interface treatment, in order to enhance the connection performance between the UHPC and the concrete, ensure their collaborative work and maintain the stability of the overall structure, interface treatment methods such as roughening, rebar installation, and application of interface agents are used between the UHPC and the concrete to enhance shear strength. However, traditional interface connection molding devices cannot effectively form a firm and stable connection at the joint interface, and are time-consuming and labor-intensive. Summary of the Invention

[0004] This application provides a concrete interface bonding molding device, which can solve the problems of traditional interface bonding molding devices failing to effectively form a firm and stable connection at the bonding interface, and being time-consuming and labor-intensive.

[0005] This application provides a concrete interface bonding molding device, which includes:

[0006] The end cap has several pre-set holes on one side and is secured with a bracket.

[0007] A leak-proof baffle extends from the preset hole, the leak-proof baffle is located on the same side as the bracket, and a slurry receiving space is formed between the leak-proof baffle and the preset hole, the slurry receiving space being used to receive slurry;

[0008] Steel fibers, at least partially disposed within the preset holes and the slurry receiving space.

[0009] In one embodiment, the leak-proof baffle includes a straight section and a curved section, one end of the curved section is fixed to the bottom end of the preset hole, and the other end is fixed to the straight section.

[0010] Along the bottom end of the preset hole and its own top direction, both the curved section and the straight section extend upward and gradually move away from the preset hole.

[0011] In one embodiment, the angle between the straight section and the plane containing the preset hole ranges from 30° to 60°.

[0012] In one embodiment, the straight distance between the top of the straight section and the plane containing the preset hole is in the range of 3 to 5 mm.

[0013] In one embodiment, the bracket has a slot, and a locking block protrudes from one side of the closing plate. The bracket engages with the locking block through the slot to lock and fix it to the closing plate.

[0014] In one embodiment, the support plate includes four long strips, which are fixed end to end in sequence, and the slot is formed in the long strip that contacts the closing plate.

[0015] In one embodiment, a stiffening rib is provided on one side of the closing plate, and the cross-section of the stiffening rib is wavy.

[0016] In one embodiment, the protrusion height of the stiffening rib is in the range of 3 to 5 mm, and the width of the stiffening rib is in the range of 2 to 3 cm.

[0017] In one embodiment, a plurality of the preset holes form a group of hole units, and the number of the hole units is multiple groups. The multiple groups of hole units are distributed sequentially at intervals. The length direction of the hole units is consistent with the length direction of the stiffening ribs, and the stiffening ribs are disposed between two adjacent groups of hole units.

[0018] In one embodiment, a plurality of the preset holes are arranged in a rectangular pattern, and the spacing between two adjacent preset holes in the horizontal direction and the spacing between two adjacent preset holes in the vertical direction are both 3 to 5 mm. The size of the preset holes is 6 × 8 mm.

[0019] The beneficial effects of the technical solutions provided in this application include:

[0020] The pre-drilled holes allow a small amount of ultra-high performance concrete (UHPC) slurry to seep out, forming a naturally rough interface with ordinary concrete and enhancing the bonding strength between the two. The leak-proof baffle prevents excessive loss of UHPC through physical blocking, while allowing some steel fibers to extend outwards without completely detaching. The end plate is fixed to the bracket by a snap-fit ​​mechanism, with the bracket providing stable support. The snap-fit ​​structure simplifies the installation process, eliminating the need for complex bolts or welding and reducing construction difficulty. The bracket enhances overall rigidity, ensuring that the end plate does not shift or deform during pouring. The steel fibers are at least partially placed within the pre-drilled holes and the slurry-accommodating space, and their leakage is restricted by the leak-proof baffle. The steel fibers are confined within the pre-drilled holes and the slurry-accommodating space, ensuring their distribution at the interface. This avoids the inability of traditional interface bonding molding devices to effectively form a strong and stable connection at the bonding interface. The extended portion of the steel fibers is embedded in the ordinary concrete, forming a mechanical interlock and improving the shear resistance of the interface. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural diagram of the concrete interface connection molding device in use;

[0023] Figure 2 A partially enlarged structural diagram of the upper left corner of the concrete interface connection molding device;

[0024] Figure 3 This is an enlarged structural diagram of a single pre-set hole;

[0025] Figure 4 for Figure 3 A side view structural diagram.

[0026] In the diagram: 1. Ultra-high performance concrete; 2. End plate; 21. Pre-set hole; 22. Leak-proof baffle; 221. Straight section; 222. Curved section; 23. Grouting space; 24. Clip; 25. Stiffening rib; 3. Support; 31. Long strip plate; 4. Grout; 5. Steel fiber. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0028] This application provides a concrete interface bonding molding device, which can solve the problems of traditional interface bonding molding devices failing to effectively form a firm and stable connection at the bonding interface, and being time-consuming and labor-intensive.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, this application provides a concrete interface connection molding device, which includes: a closing plate 2, on one side of the closing plate 2 having a plurality of preset holes 21, and a bracket 3 being snapped and fixed thereon; a leak-proof baffle 22 extending from the preset holes 21, the leak-proof baffle 22 being located on the same side as the bracket 3, and a slurry receiving space 23 being formed between the leak-proof baffle 22 and the preset holes 21, the slurry receiving space 23 being used to receive slurry; and steel fibers 5, the steel fibers 5 being at least partially disposed within the preset holes 21 and the slurry receiving space 23.

[0030] In this embodiment, several pre-set holes 21 are opened on one side of the end plate 2. A leak-proof baffle 22 extends from the pre-set holes 21 and is located on the same side as the bracket 3. A grout-accommodating space 23 is formed between the leak-proof baffle 22 and the pre-set holes 21. The pre-set holes 21 allow a small amount of ultra-high performance concrete 1 (UHPC) grout 4 to seep out, forming a naturally rough interface with ordinary concrete, enhancing the bonding strength between the two. The leak-proof baffle 22 prevents excessive loss of UHPC through physical blocking, while allowing some steel fibers 5 to extend outwards but not completely detach. The end plate 2 and the bracket 3 are fixed by a snap-fit ​​mechanism. The bracket 3 provides stable support. The snap-fit ​​structure simplifies the installation process, eliminating the need for complex bolts or welding, reducing construction difficulty. The bracket 3 enhances overall rigidity, ensuring the end plate 2 is stable during pouring. During construction, the steel fibers 5 are not displaced or deformed; at least part of the steel fibers 5 are placed in the pre-set holes 21 and the slurry containing space 23, and their leakage is restricted by the anti-leakage baffle 22. The steel fibers 5 are confined in the pre-set holes 21 and the slurry containing space 23 to ensure their distribution at the interface, avoiding the problem of uneven strength caused by the scattering of steel fibers in traditional processes. The extended part of the steel fibers 5 is embedded in the ordinary concrete to form a mechanical interlock, which improves the shear resistance of the interface. The slurry containing space 23 between the anti-leakage baffle 22 and the pre-set holes 21 is used to temporarily store the seeping UHPC. The slurry containing space 23 provides a buffer area to prevent the slurry from flowing out rapidly due to excessive pressure, ensuring sufficient slurry at the interface. After solidification, the stored slurry 4 forms a continuous transition layer with the ordinary concrete, reducing the stress concentration at the interface.

[0031] In one implementation, such as Figure 3 and Figure 4 As shown, the leak-proof baffle 22 includes a straight section 221 and a curved section 222. One end of the curved section 222 is fixed to the bottom end of the preset hole 21, and the other end is fixed to the straight section 221. Along the bottom end of the preset hole 21 and its own top direction, both the curved section 222 and the straight section 221 extend upward and gradually move away from the preset hole 21.

[0032] In this embodiment, the straight section 221 extends upward along the top of the preset hole 21, providing a linear guiding effect to guide the seeping UHPC grout to be evenly distributed to the ordinary concrete interface, forming a continuous grout transition layer; the curved section 222 extends upward from the bottom of the preset hole 21 and connects with the straight section 221, slowing down the grout flow rate through the arc transition structure, reducing the instantaneous excessive loss of grout due to gravity or pouring pressure; both the curved section 222 and the straight section 221 gradually move away from the preset hole 21, forming an outwardly expanding channel, increasing the contact area between the grout and the ordinary concrete, and enhancing the interface bonding; one end of the curved section 222 is fixed to the bottom of the preset hole 21, and the other end is seamlessly connected to the straight section 221, ensuring the mechanical stability of the leak-proof baffle 22 and avoiding deformation or detachment caused by grout impact during the pouring process; the arc design of the curved section 222 and the straight section of the straight section 221 work together to form a physical barrier, allowing the steel fiber part to extend outward to form mechanical interlocking, while effectively preventing the complete leakage of grout and steel fiber.

[0033] In one implementation, such as Figure 3 and Figure 4 As shown, the angle between the straight section 221 and the plane containing the preset hole 21 is in the range of 30° to 60°.

[0034] In this embodiment, the angle between the straight section 221 and the plane of the preset hole 21 is controlled within the range of 30° to 60° to ensure that the slurry can be evenly distributed during the seepage process, while avoiding excessive slurry flow rate due to excessive angle or slurry blockage due to excessive angle. The inclination angle of the straight section 221 provides linear guidance for the slurry, enabling it to seep evenly along the preset direction, forming a continuous slurry transition layer, enhancing the interface bonding performance. Combined with the arc structure of the curved section 222, the angle design of the straight section 221 further reduces the amount of slurry loss, ensuring that the slurry at the interface is sufficient and dense. The angle range of 30° to 60° allows the straight section 221 to withstand the impact of slurry during the pouring process, avoiding deformation or detachment, and improving construction stability. This angle design can be adjusted according to specific construction needs, flexibly adapting to different UHPC mix ratios and pouring pressure requirements.

[0035] In one implementation, such as Figure 3 and Figure 4 As shown, the straight distance between the top of the straight section 221 and the plane where the preset hole 21 is located is in the range of 3 to 5 mm.

[0036] In this embodiment, the straight-line distance between the top of the straight section 221 and the plane of the preset hole 21 is controlled within the range of 3-5mm to ensure that the slurry can be evenly distributed during the seepage process, while avoiding slurry loss due to excessive distance or slurry blockage due to insufficient distance. The top distance of the straight section 221 is designed to provide linear guidance for the slurry, enabling it to seep out evenly along the preset direction, forming a continuous slurry transition layer, enhancing the interface bonding performance. Combined with the arc structure of the curved section 222, the top distance of the straight section 221 further reduces the amount of slurry loss, ensuring that the slurry at the interface is sufficient and dense. The distance range of 3-5mm allows the straight section 221 to withstand the impact of slurry during the pouring process, avoiding deformation or detachment, and improving construction stability. This distance design can be adjusted according to specific construction needs, flexibly adapting to different UHPC mix ratios and pouring pressure requirements.

[0037] In one implementation, such as Figure 1 and Figure 2 As shown, the bracket 3 has a slot, and the closing plate 2 has a protruding block 24 on one side. The bracket 3 engages with the slot and the block 24 to engage and fix with the closing plate 2.

[0038] In this embodiment, the slot in the bracket 3 and the locking block 24 of the closing plate 2 form a mechanical locking structure, ensuring a stable connection and easy disassembly. The size and shape of the slot precisely match the locking block 24, preventing loosening or misalignment during the connection process. After the locking block 24 is inserted into the slot, it can be fixed or disassembled by a simple push-pull action, improving construction efficiency. This design requires no additional tools or complex operations and is suitable for scenarios with frequent installation and disassembly. The matching design of the slot and the locking block 24 ensures that the force at the connection between the bracket 3 and the closing plate 2 is even, reducing stress concentration and improving the overall structural stability. The locking structure is not easily deformed or detached when subjected to external forces, ensuring long-term reliability.

[0039] In one implementation, such as Figure 1 and Figure 2 As shown, the bracket 3 includes four long strips 31, which are fixed end to end in sequence, and the slot is formed on the long strip 31 that contacts the closing plate 2.

[0040] In this embodiment, the bracket 3 is composed of four long strips 31 fixed end to end in sequence to form a stable frame structure, ensuring overall rigidity and load-bearing capacity. The long strips 31 are fixed by welding or bolting to improve the strength and durability of the connection. The slots are opened on the long strips 31 that contact the end plate 2 to ensure the precise fit between the locking block 24 and the slot, avoiding misalignment or loosening during the connection process. The size and shape of the slots are optimized according to the design of the locking block 24 to ensure the smoothness and stability of the locking process. The modular design of the four long strips 31 facilitates the assembly and disassembly of the bracket 3 and is suitable for end plates 2 of different sizes and shapes. This design can adjust the length and number of long strips 31 according to specific needs, flexibly adapting to diverse engineering scenarios.

[0041] In one implementation, such as Figure 1 and Figure 2 As shown, a stiffening rib 25 protrudes from one side of the closing plate 2, and the cross-section of the stiffening rib 25 is wavy.

[0042] In this embodiment, the corrugated cross-section of the stiffening rib 25 increases its surface area and structural stiffness, effectively improving the bending and deformation resistance of the end plate 2. The corrugated design allows the stiffening rib 25 to distribute stress evenly when under load, reducing local stress concentration and extending service life. The corrugated cross-section design increases the contact area between the end plate 2 and the ultra-high performance concrete, further improving the connection strength and stability. The corrugated stiffening rib 25 can better adapt to changes in external loads, effectively bearing and transmitting loads regardless of whether it is positive or negative pressure, reducing deformation and damage to the end plate 2.

[0043] In one implementation, such as Figure 1 and Figure 2 As shown, the protrusion height of the stiffening rib 25 ranges from 3 to 5 mm, and the width of the stiffening rib 25 ranges from 2 to 3 cm.

[0044] In this embodiment, the protrusion height of the stiffening rib 25 is 3-5mm and the width is 2-3cm. Through reasonable size matching, it is ensured that while improving the structural rigidity, it will not significantly affect the overall weight and construction difficulty. This size range has been verified by mechanical calculations and experiments, and can achieve lightweight design while ensuring performance. The protrusion height and width design of the stiffening rib 25 enable it to effectively share the load of the closing plate 2, reduce local stress concentration, and improve the bending and deformation resistance of the overall structure.

[0045] In one implementation, such as Figure 1 and Figure 2As shown, a number of the preset holes 21 form a group of hole units, and there are multiple groups of hole units. The multiple groups of hole units are distributed sequentially at intervals. The length direction of the hole unit is consistent with the length direction of the stiffening rib 25, and the stiffening rib 25 is disposed between two adjacent groups of hole units.

[0046] In this embodiment, multiple sets of hole units are distributed sequentially at intervals, and the length direction of the hole units is consistent with the length direction of the stiffening ribs 25, ensuring uniform stress distribution and avoiding stress concentration. The stiffening ribs 25 are set between two adjacent sets of hole units, effectively enhancing the rigidity and stability of the local structure. This design can adjust the number and spacing of hole units according to actual needs, flexibly adapting to diverse engineering scenarios.

[0047] In one implementation, such as Figure 1 and Figure 2 As shown, the preset holes 21 are arranged in a rectangular shape. The distance between two adjacent preset holes 21 in the horizontal direction and the distance between two adjacent preset holes 21 in the vertical direction are both 3 to 5 mm. The size of the preset hole 21 is 6×8 mm.

[0048] In this embodiment, the preset holes 21 are rectangularly distributed, and the horizontal and vertical spacing is 3-5mm, which ensures that the hole positions are evenly arranged, avoids stress concentration, and improves the stability of the overall structure. This design optimizes the hole position distribution so that the structure can evenly transmit the load when under stress, reducing local deformation. The size of the preset holes 21 is 6×8mm. After mechanical calculation and experimental verification, it can meet the functional requirements while ensuring the structural strength.

[0049] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0050] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A concrete interface bonding and forming device, characterized in that, It includes: The constriction plate (2) has several pre-set holes (21) on one side and is fixed with a bracket (3); A leak-proof baffle (22) extends from the preset hole (21). The leak-proof baffle (22) and the bracket (3) are located on the same side, and a slurry receiving space (23) is formed between the leak-proof baffle (22) and the preset hole (21). The slurry receiving space (23) is used to receive slurry. Steel fiber (5), the steel fiber (5) is at least partially disposed in the preset hole (21) and the slurry receiving space (23).

2. The concrete interface bonding and forming device as described in claim 1, characterized in that, The leak-proof baffle (22) includes a straight section (221) and a curved section (222). One end of the curved section (222) is fixed to the bottom end of the preset hole (21), and the other end is fixed to the straight section (221). Along the bottom end of the preset hole (21) and its own top direction, both the curved section (222) and the straight section (221) extend upward and gradually move away from the preset hole (21).

3. The concrete interface bonding and forming device as described in claim 2, characterized in that, The angle between the straight section (221) and the plane containing the preset hole (21) is in the range of 30° to 60°.

4. The concrete interface bonding and forming device as described in claim 2, characterized in that, The straight distance between the top of the straight section (221) and the plane where the preset hole (21) is located is 3 to 5 mm.

5. The concrete interface bonding and forming device as described in claim 1, characterized in that, The bracket (3) has a slot, and a locking block (24) protrudes from one side of the closing plate (2). The bracket (3) engages with the locking block (24) through the slot to lock and fix it to the closing plate (2).

6. The concrete interface bonding and forming device as described in claim 5, characterized in that, The bracket (3) includes four long strips (31), which are fixed end to end in sequence, and the slot is opened on the long strip (31) that is in contact with the closing plate (2).

7. The concrete interface bonding and forming device as described in claim 1, characterized in that, The closing plate (2) has a stiffening rib (25) protruding on one side, and the cross-section of the stiffening rib (25) is wavy.

8. The concrete interface bonding and forming device as described in claim 7, characterized in that, The height of the stiffening rib (25) is 3-5 mm, and the width of the stiffening rib (25) is 2-3 cm.

9. The concrete interface bonding and forming device as described in claim 7, characterized in that, A number of the preset holes (21) form a group of hole units. There are multiple groups of hole units, and the multiple groups of hole units are distributed sequentially at intervals. The length direction of the hole unit is consistent with the length direction of the stiffening rib (25), and the stiffening rib (25) is arranged between two adjacent groups of hole units.

10. The concrete interface bonding and forming device as described in claim 1, characterized in that... The preset holes (21) are arranged in a rectangular shape. The distance between two adjacent preset holes (21) in the horizontal direction and the distance between two adjacent preset holes (21) in the vertical direction are both 3 to 5 mm. The size of the preset holes (21) is 6×8 mm.

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