Deformation joint double-column formwork reinforcing system
The double-column formwork reinforcement system for expansion joints solves the problem of strengthening expansion joint formwork by using fastening components and adjustable jacking devices. It achieves uniform stress distribution on the inner formwork, high construction quality, and convenience, and is suitable for the construction of expansion joints of different widths.
Patent Information
- Application Number
- CN202520295820.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing technologies present significant challenges in reinforcing expansion joints with formwork, leading to issues such as poor construction quality, uneven stress on the formwork, and difficulty in removal. In particular, when using foam board for reinforcement, the poured concrete tends to float, narrowing the gap and making cleaning difficult.
A double-column formwork reinforcement system for expansion joints is adopted, which includes a panel system and a reinforcement system. Using fastening components and an adjustable jacking device, the outer and inner formworks are connected by horizontal and vertical fastening bolts, and the spacing of the inner formworks is adjusted by the adjustable jacking device to ensure uniform stress.
It achieves uniform stress distribution in all parts of the inner formwork, resulting in high construction quality, convenient installation and disassembly, and applicability to expansion joints of different widths, thus reducing construction costs.
Smart Images
Figure CN223893795U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building technology, and in particular relates to a double-column formwork reinforcement system for expansion joints. Background Technology
[0002] Buildings often deform under external forces, leading to cracking and even damage. To address this cracking issue, expansion joints are typically installed. However, because expansion joints are generally narrow, it's impossible to install formwork directly at the joint. Therefore, current techniques often involve reinforcing the formwork by stuffing timber, creating molds, or filling with foam boards. However, these methods are difficult to implement and prone to poor construction quality and uneven stress on the formwork, resulting in bulging and deformation at the expansion joint, making removal difficult. Especially when using foam boards for reinforcement, problems arise during concrete pouring, as the foam boards may float to the surface, narrowing the expansion joint and making complete cleaning impossible. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a double-column formwork reinforcement system for expansion joints, which can make the stress on each part of the inner formwork uniform, has a simple overall structure, is easy to install and dismantle, and ensures the construction quality of expansion joints.
[0004] The technical solution adopted in this utility model is: a double-column formwork reinforcement system for expansion joints, comprising:
[0005] A panel system is used to enclose the casting space for forming the columns on both sides of the expansion joint; the panel system includes an outer template and an inner template, with two inner templates arranged opposite each other to form the expansion joint;
[0006] A reinforcement system for reinforcing the panel system includes fastening components and adjustable jacking devices. The fastening components are used to connect the inner template and the outer template together. Several adjustable jacking devices are arranged vertically between two inner templates, which can drive the inner templates to move closer or further apart.
[0007] Furthermore, the fastening assembly includes a transverse fastening screw and a longitudinal fastening screw, the transverse fastening screw passing through two opposing outer templates; the longitudinal screw passing through two inner templates and two outer templates opposite to the inner templates.
[0008] Furthermore, the adjustable jacking device is disposed between the upper and lower adjacent longitudinal fastening screws.
[0009] Furthermore, the adjustable jacking device includes a support base, a fixed base, a support rod, and an adjusting rod; the support bases are arranged opposite to each other and connected to the inner template; the fixed bases are arranged opposite to each other between the two support bases; one end of the support rod is hinged to the support base, and the other end is hinged to the fixed base; the adjusting rod is threadedly connected to the two fixed bases.
[0010] Furthermore, the adjusting rod is arranged in a horizontal direction.
[0011] Furthermore, the support rod includes an upper support rod and a lower support rod, with both ends of the upper support rod hinged to the upper end faces of the fixed base and the support base, respectively, and both ends of the lower support rod hinged to the lower end faces of the fixed base and the support base, respectively; the adjusting rod passes through the middle of the fixed base.
[0012] Furthermore, the fastening assembly also includes a wooden beam and a steel pipe, with the wooden beam disposed between the steel pipe and the outer template, and the ends of the transverse fastening screw and the longitudinal fastening screw fixed to the steel pipe by fasteners.
[0013] Furthermore, the support base is fixed to the inner template by bolts.
[0014] Furthermore, one end of the adjusting rod is provided with a handle, which faces outward from the expansion joint.
[0015] The advantages and positive effects of this utility model are:
[0016] (1) The overall structure is simple and the design is ingenious. All materials used on the construction site are easy to process and manufacture, and easy to install and dismantle.
[0017] (2) By using fastening components and adjustable jacking devices in combination, the outer and inner formwork can be fixed in the set position, avoiding the situation where the inner formwork cannot be effectively reinforced due to the narrowness of the expansion joint; the adjustable jacking devices push against the two inner formworks, which can effectively prevent the inner formwork from shifting under the lateral pressure of concrete; by setting multiple adjustable jacking devices from bottom to top at the expansion joint, the force on each part of the inner formwork can be uniform, and during the installation process, the adjustable jacking devices are installed and disassembled synchronously with the inner formwork, which is very convenient and quick, ensuring the installation quality of the inner formwork and improving the installation efficiency;
[0018] (3) By designing the adjustable jacking device, the spacing between the inner templates can be adjusted. The adjustment process is simple and quick and can be used for the construction of expansion joints of different widths. By uniformly setting the adjustable jacking device along the height direction of the inner template and setting the adjustment rod along the horizontal direction, the force on each part of the inner template is uniform and it is convenient for operators to make adjustments on the outside of the expansion joint.
[0019] (4) The support base is detachably fixed to the inner formwork. While achieving a reliable connection between the two, the adjustable jacking device can be removed from the inner formwork to enable the reuse of both and reduce construction costs. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;
[0021] Figure 2 This is a top view schematic diagram of a specific embodiment of the present utility model;
[0022] Figure 3 This is a front view of an adjustable jacking device according to a specific embodiment of the present invention;
[0023] Figure 4 This is a top view of an adjustable jacking device according to a specific embodiment of the present invention.
[0024] In the picture:
[0025] 1. Column; 2. Expansion joint; 3. Panel system; 31. Inner formwork; 32. Outer formwork; 4. Reinforcement system; 41. Fastening components; 411. Horizontal fastening bolts; 412. Longitudinal fastening bolts; 413. Timber; 414. Steel pipe; 415. Fasteners; 42. Adjustable jacking device; 421. Support base; 422. Fixed base; 423. Support rod; 4231. Upper support rod; 4232. Lower support rod; 424. Adjusting rod; 425. Handle. Detailed Implementation
[0026] The embodiments of this utility model will now be described with reference to the accompanying drawings.
[0027] like Figure 1 As shown, this utility model proposes a double-column formwork reinforcement system for expansion joints, used for the construction of columns 1 on both sides of expansion joint 2. It includes a panel system 3 and a reinforcement system 4. The panel system 3 is used to enclose and form the pouring space of columns 1 on both sides of expansion joint 2. The reinforcement system 4 is used to reinforce the panel system 3 so that the panel system 3 can be stably fixed in a set position with a set shape. The following is a detailed description of each part.
[0028] The panel system 3 includes an outer template 32 and an inner template 31. The two inner templates 31 are arranged opposite each other to form an expansion joint 2. The outer template 32 and the inner template 31 are spliced together to form a closed casting space. In this embodiment, two columns 1 are respectively provided on both sides of the expansion joint 2. The inner template 31 and the outer template 32 are spliced together to form the outline shape of the column 1. The shape can be square, rectangular, trapezoidal or any other shape with at least one plane, which is not limited here. Taking the cross-section of the column 1 as square or rectangular as an example, two inner templates 31 are respectively provided on both sides of the expansion joint 2. Each inner template 31 is spliced together with three outer templates 32. Two outer templates 32 are arranged opposite each other and are respectively connected to the opposite ends of the inner templates 31. The other outer template 32 is arranged opposite to the inner template 31 and is respectively connected to the two outer templates 32 to form the overall panel system 3.
[0029] The reinforcement system 4 includes a fastening component 41 and an adjustable jacking device 42. The fastening component 41 is used to connect the inner template 31 and the outer template 32 into one unit. Several adjustable jacking devices 42 are arranged vertically between two inner templates 31, which can drive the inner templates 31 to move closer or further apart from each other.
[0030] Through the above technical solution, the fastening component 41 and the adjustable jacking device 42 work together to fix both the outer formwork 32 and the inner formwork 31 in the set position. By setting the adjustable jacking device 42, the situation where the inner formwork 31 cannot be effectively reinforced due to the narrowness of the expansion joint 2 is avoided. When the two inner formworks 31 are controlled to move away from each other by the adjustable jacking device 42, the adjustable jacking device 42 pushes against the two inner formworks 31 and applies lateral load to the inner formwork 31, which can effectively prevent the inner formwork 31 from displacing under the lateral pressure of concrete. By setting multiple adjustable jacking devices 42 from bottom to top at the expansion joint 2, the force on each part of the inner formwork 31 can be uniform, which can effectively avoid the problem of formwork bulging and deformation caused by uneven force on the inner formwork 31. After the concrete is poured, the two inner formworks 31 can be controlled to move closer to each other by the adjustable jacking device 42, which can easily complete the demolding of the inner formwork 31 and then remove the inner formwork 31. The operation is more convenient and ensures the construction quality of the expansion joint 2.
[0031] like Figure 2As shown in the embodiment of this application, the fastening assembly 41 includes a transverse fastening screw 411 and a longitudinal fastening screw 412. The transverse fastening screw 411 passes through two opposing outer templates 32; the longitudinal fastening screw 412 passes through two inner templates 31 and two outer templates 32 opposite to the inner templates 31. The transverse fastening screw 411 and the longitudinal fastening screw 412 are evenly arranged on the outer templates 32 and the inner templates 31. Their function is to prevent the inner templates 31 and the outer templates 32 from deforming or shifting under concrete pressure, ensuring the accuracy of the dimensions and shape of the column 1, while improving the overall stability of the panel system 3, preventing tilting or collapse during the pouring process, and ensuring that the concrete pressure is evenly distributed on the inner templates 31 and the outer templates 32, reducing local stress concentration and lowering the risk of template damage. This application uses transverse fastening bolts 411 to connect and fix two opposing outer templates 32 together. By using transverse fastening bolts 411, the two inner templates 31 on both sides of the expansion joint 2 and the two outer templates 32 opposite to the inner templates 31 are connected and fixed together, thereby strengthening and fixing the overall panel system 3 and ensuring the accurate position and shape of the column 1. At the same time, this technical solution makes it easier for construction personnel to install the transverse fastening bolts 411 and the longitudinal fastening bolts 412, which is beneficial to improving the installation accuracy and quality of both.
[0032] like Figure 2 As shown, in this embodiment, the adjustable jacking device 42 is disposed between the upper and lower adjacent longitudinal fastening screws 412. This arrangement ensures that the adjustable jacking device 42 and the longitudinal fastening screws 412 will not interfere with each other and can effectively play their respective roles. At the same time, the adjustable jacking device 42 and the longitudinal fastening screws 412 are interlaced to ensure that the two inner templates 31 are subjected to uniform force from top to bottom, thus avoiding deformation of the inner templates 31.
[0033] like Figure 3 , Figure 4As shown in the embodiment of this application, the adjustable jacking device 42 includes a support base 421, a fixed base 422, a support rod 423, and an adjusting rod 424; wherein the support base 421 is disposed opposite to and connected to the inner template 31; the fixed base 422 is disposed opposite to the two support bases 421; one end of the support rod 423 is hinged to the support base 421, and the other end is hinged to the fixed base 422; the adjusting rod 424 is threadedly connected to the two fixed bases 422. Each fixed seat 422 is connected to the two side support seats 421 via a support rod 423. The two fixed seats 422 are connected by an adjusting rod 424. By rotating the adjusting rod 424, the two fixed seats 422 can be controlled to move closer or further apart, thereby changing the angle between the support rod 423 and the fixed seats 422 and support seats 421, and thus adjusting the distance between the two support seats 421. Specifically, when the two fixed seats 422 move closer together, the angle between the support rod 423 and the fixed seats 422 and support seats 421 increases, the distance between the two support seats 421 increases, and the two inner formworks 31 move further apart. When concrete is poured into the two columns 1 simultaneously, the concrete will compress the inner formwork. The inner formwork 31 transmits pressure to the support base 421. At this time, the support rods 423 on both sides of the fixed base 422 can effectively resist the lateral pressure of the support base 421, keeping the two support bases 421 at a set distance, thereby preventing the inner formwork 31 from moving or deforming. After the concrete is poured, by rotating the adjusting rod 424, the fixed base 422 can be moved away from each other, thereby causing the support rods 423 on both sides to rotate relative to each other. The included angle between the support rods 423 and the fixed base 422 and the support base 421 becomes smaller, the distance between the two support bases 421 decreases, and the two inner formworks 31 move closer to each other, thereby realizing the demolding and further removal of the inner formwork 31. At the same time, the adjusting rod 424 in this application can adjust the distance between the support bases 421, so that the adjustable jacking device 42 in this application can be used for the construction of expansion joints 2 of different widths, improving the applicability of the adjustable jacking device 42.
[0034] like Figure 3 As shown in the embodiment of this application, the adjusting rod 424 is arranged in the horizontal direction; the adjustable jacking device 42 can be set to various sizes, and a suitable adjustable jacking device 42 can be configured according to the size of the expansion joint 2, so that each adjustable jacking device 42 can cover the entire range of the expansion joint 2 in the horizontal direction, or cover half of the range of the expansion joint 2 in the horizontal direction. That is to say, the two adjustable jacking devices 42 are set at the same height of the expansion joint 2, and jointly support the inner templates 31 on both sides, so as to facilitate the construction personnel to rotate the adjusting rod 424 on the outside of the expansion joint 2.
[0035] like Figure 3 , Figure 4As shown in the embodiment of this application, the support rod 423 includes an upper support rod 4231 and a lower support rod 4232. The two ends of the upper support rod 4231 are respectively hinged to the upper end faces of the fixed seat 422 and the support seat 421, and the two ends of the lower support rod 4232 are respectively hinged to the lower end faces of the fixed seat 422 and the support seat 421. The adjusting rod 424 passes through the middle of the fixed seat 422. That is to say, each fixed seat 422 and the support seat 421 are provided with four support rods 423 in two rows. By rotating the adjusting rod 424, the eight support rods 423 on both sides of the fixed seat 422 can be driven to rotate synchronously, so as to adjust the distance between the support seats 421 and form a common support for the support seats 421, which enhances the ability of the support seats 421 to resist the lateral pressure of the inner template 31, and also makes the overall structure more stable and reliable.
[0036] like Figure 1 , Figure 2 As shown, the fastening assembly 41 also includes a wooden beam 413 and a steel pipe 414. The wooden beam 413 is disposed between the steel pipe 414 and the outer template 32. The ends of the transverse fastening screws 411 and the longitudinal fastening screws 412 are fixed to the steel pipe 414 by fasteners 415. Through the cooperation between the transverse fastening screws 411, the longitudinal fastening screws 412, the wooden beam 413, and the steel pipe 414, a stable reinforcement and fixing effect is formed on the panel system 3.
[0037] In this application, the support base 421 is preferably fixed to the inner template 31 in a detachable manner, so that the two can be reliably connected and the support base 421 can be removed from the inner template 31 to enable the reuse of the two; in a specific embodiment, the support base 421 is fixed to the inner template 31 by bolts.
[0038] Furthermore, such as Figure 4 As shown, one end of the adjusting rod 424 is provided with a handle 425. The handle 425 faces the outside of the expansion joint 2 and is located at the end of the adjusting rod 424 that passes through the fixed seat 422 on the opposite outside, so that the operator can rotate the rod adjusting rod 424 by the handle 425.
[0039] In this application, both the panel system 3 and the reinforcement system 4 are made using materials commonly found on the construction site to reduce construction costs.
[0040] This application also proposes a construction method for a double-column formwork reinforcement system for expansion joints, including the following steps:
[0041] S1, Create panel system 3;
[0042] Specifically, this includes making inner template 31 and outer template 32 of corresponding sizes according to the dimensions of the main body in the design drawings;
[0043] S2. Install the adjustable jacking device 42 on the two inner templates 31;
[0044] Specifically, the adjustable jacking device 42 is evenly arranged between the two inner templates 31 along the height direction of the inner template 31, and the support base 421 is fixed to the inner template 31 by bolts; during installation, the intended installation position of the longitudinal fastening screw 412 in the design should be avoided.
[0045] In this application, the adjustable jacking device 42 can be assembled before being installed on the inner template 31, or the support base 421 can be installed at a set position on the inner template 31 first, and then the support rod 423 and the fixed base 422 can be assembled respectively.
[0046] S3. Install the outer template 32 in the set position, place the inner template 31 between the outer template 32, and install the fastening component 41 to initially fix the inner template 31 and the outer template 32.
[0047] The process includes passing a transverse fastening screw 411 through two opposing outer templates 32, and passing a longitudinal fastening screw 412 successively through the outer template 32 and inner template 31 of one column 1 and the inner template 31 and outer template 32 of another main body. The two ends of the transverse fastening screw 411 and the longitudinal fastening screw 412 are fixed by wooden beams 413, steel pipes 414 and fasteners 415 respectively. In this embodiment, the fasteners 415 are cross fasteners.
[0048] S4. Adjust the spacing between the inner templates 31 by rotating the handle 425 so that the inner templates 31 and the outer templates 32 are joined together;
[0049] Specifically, this includes rotating the adjusting rod 424 to bring the two fixed seats 422 closer together, causing the support rod 423 to rotate, causing the support seats 421 to move away from each other, and then causing the inner templates 31 to move away from each other, until the inner templates 31 and the outer templates 32 are joined together to form a closed structure. At this time, the distance between the inner templates 31 is equal to the design width of the expansion joint 2.
[0050] When adjusting the adjustable jacking device 42, multiple adjustable jacking devices 42 arranged along the height of the expansion joint 2 can be adjusted to the same state so that the force on each part of the inner template 31 is uniform; through the joint action of the fastening component 41 and the adjustable jacking device 42, the inner template 31 and the outer template 32 are shaped and reinforced.
[0051] S5. Pour concrete for column 1 and cure it.
[0052] After the panel system 3 and reinforcement system 4 are installed and accepted, the main concrete is poured. The columns 1 on both sides of the expansion joint 2 are poured simultaneously. After the pouring is completed, the concrete is cured until it reaches the required strength.
[0053] S6. Remove the fastening assembly 41 and the outer template 32, and use the rotating rod handle 425 to bring the inner templates 31 closer together, and remove the inner templates 31.
[0054] Specifically, this includes sequentially removing fasteners 415, steel pipes 414, timber 413, transverse fastening bolts 411, and longitudinal fastening bolts 412; then removing the three outer formworks 32 on the outside of each main body; and finally removing the inner formworks 31 on both sides of the expansion joint 2. When the columns 1 on both sides of the expansion joint 2 are relatively high, the inner formwork 31 is composed of several pieces assembled together, and is removed from top to bottom. The adjustable jacking device 42 is used to control the inner formworks 31 on both sides of the expansion joint 2 to move closer to each other, so that the inner formwork 31 is detached from the concrete main body. Then, the inner formwork 31 is moved out of the position of the expansion joint 2 together with the adjustable jacking device 42, and the adjustable jacking device 42 is removed from the inner formwork 31 so that the inner formwork 31 and the adjustable jacking device 42 can be reused.
[0055] The expansion joint double-column formwork reinforcement system provided in this application has the following beneficial effects:
[0056] (1) The overall structure is simple and the design is ingenious. All materials used on the construction site are easy to process and manufacture, and easy to install and dismantle.
[0057] (2) By using fastening components and adjustable jacking devices in combination, the outer and inner formwork can be fixed in the set position, avoiding the situation where the inner formwork cannot be effectively reinforced due to the narrowness of the expansion joint; the adjustable jacking devices push against the two inner formworks, which can effectively prevent the inner formwork from shifting under the lateral pressure of concrete; by setting multiple adjustable jacking devices from bottom to top at the expansion joint, the force on each part of the inner formwork can be uniform, and during the installation process, the adjustable jacking devices are installed and disassembled synchronously with the inner formwork, which is very convenient and quick, ensuring the installation quality of the inner formwork and improving the installation efficiency;
[0058] (3) By designing the adjustable jacking device, the spacing between the inner templates can be adjusted. The adjustment process is simple and quick and can be used for the construction of expansion joints of different widths. By uniformly setting the adjustable jacking device along the height direction of the inner template and setting the adjustment rod along the horizontal direction, the force on each part of the inner template is uniform and it is convenient for operators to make adjustments on the outside of the expansion joint.
[0059] (4) The support base can be detachably fixed to the inner formwork. While achieving a reliable connection between the two, the adjustable jacking device can be removed from the inner formwork to enable the reuse of both and reduce construction costs.
[0060] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.
Claims
1. A double-column formwork reinforcement system for expansion joints, characterized in that, include: A panel system is used to enclose the casting space for forming the columns on both sides of the expansion joint; the panel system includes an outer template and an inner template, with two inner templates arranged opposite each other to form the expansion joint; A reinforcement system for reinforcing the panel system includes fastening components and adjustable jacking devices. The fastening components are used to connect the inner template and the outer template together. Several adjustable jacking devices are arranged vertically between two inner templates, which can drive the inner templates to move closer or further apart.
2. The expansion joint double-column formwork reinforcement system according to claim 1, characterized in that: The fastening assembly includes a transverse fastening screw and a longitudinal fastening screw. The transverse fastening screw passes through two opposing outer templates. The longitudinal fastening screw passes through two inner templates and two outer templates opposite to the inner templates.
3. The expansion joint double-column formwork reinforcement system according to claim 2, characterized in that: The adjustable jacking device is disposed between the upper and lower adjacent longitudinal fastening screws.
4. The expansion joint double-column formwork reinforcement system according to claim 2 or 3, characterized in that: The adjustable jacking device includes a support base, a fixed base, a support rod, and an adjusting rod; the support bases are arranged opposite each other and connected to the inner template; the fixed bases are arranged opposite each other between the two support bases; one end of the support rod is hinged to the support base, and the other end is hinged to the fixed base; the adjusting rod is threadedly connected to the two fixed bases.
5. The expansion joint double-column formwork reinforcement system according to claim 4, characterized in that: The adjusting rod is set in the horizontal direction.
6. The expansion joint double-column formwork reinforcement system according to claim 5, characterized in that: The support rod includes an upper support rod and a lower support rod. The two ends of the upper support rod are respectively hinged to the upper end face of the fixed base and the support base, and the two ends of the lower support rod are respectively hinged to the lower end face of the fixed base and the support base; the adjusting rod passes through the middle of the fixed base.
7. The expansion joint double-column formwork reinforcement system according to claim 2, 3, 5 or 6, characterized in that: The fastening assembly also includes a wooden beam and a steel pipe. The wooden beam is disposed between the steel pipe and the outer template. The ends of the transverse fastening screw and the longitudinal fastening screw are fixed to the steel pipe by fasteners.
8. The expansion joint double-column formwork reinforcement system according to claim 5 or 6, characterized in that: The support base is fixed to the inner template by bolts.
9. The expansion joint double-column formwork reinforcement system according to claim 8, characterized in that: One end of the adjusting rod is provided with a handle, which faces outward from the expansion joint.