A device for adjusting the slope of a bent cap bottom form

Abstract

The utility model discloses a device is adjusted to the bottom mould of bent cap, technical scheme is as follows: including the support distribution beam of support in the upper part of pier, the upper part of both sides of support distribution beam is installed with bracket, and the inclined bottom mould of bent cap is supported and fixed on the upper part of this bracket, and the bottom of bracket is provided with a plurality of adjusting assembly for adjusting the inclination of support in the upper part of support distribution beam, and the adjusting assembly includes the screw rod of lower part can height lift -and -lower, and the upper part of screw rod is provided with the anti -unscrewing component that prevents falling off, the utility model through setting adjustable height screw rod and anti -unscrewing component in the bracket lower part of bent cap, its realization bent cap bottom mould inclination's nimble adjustment has solved the problem that needs to prepare a large number of different inclination formwork in traditional construction, has the advantages such as improving formwork turnover utilization, reducing material cost, enhancing construction security.

Description

Technical Field

[0001] This utility model relates to the field of bottom formwork adjustment, specifically to a slope adjustment device for bottom formwork of a cap beam. Background Technology

[0002] In recent years, the substructure of elevated bridges on urban expressways and airport expressways has generally adopted structural forms such as vase-shaped piers and π-shaped piers. In order to meet the traffic requirements under the bridge, the cap beams mostly adopt the large cantilever prestressed cap beam structure.

[0003] During the construction of large cantilever cap beams, a formwork support system needs to be erected, and support distribution beams must be installed on top of various supports. To ensure structural stability, the distribution beams are usually arranged horizontally, that is, perpendicular to the gravity line. However, in the area where the main line connects to the ramps or in the location of curved sections of the bridge, the length of the cap beam will continuously change with the direction of the line. This change in length and the change in bridge superelevation require that cap beam bottom formwork with different slopes be configured according to the actual cross slope during construction. Traditional construction methods require the preparation of a large number of cap beam bottom formworks with different slopes, which not only increases material costs but also results in low formwork turnover rate, seriously affecting the economic efficiency of construction. In addition, existing slope adjustment devices are prone to loosening of threaded connections during long-term use, posing a safety hazard. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a slope adjustment device for the bottom formwork of a cap beam.

[0005] This utility model is achieved through the following technical solution:

[0006] This application provides a slope adjustment device for the bottom formwork of a bridge pier, the technical solution of which is as follows: it includes a support distribution beam supported on the upper part of the bridge pier, brackets are installed on the upper parts of both sides of the support distribution beam, the upper part of the brackets supports and fixes the inclined bottom formwork of the bridge pier, and the bottom of the brackets is provided with a plurality of adjustment components supported on the upper part of the support distribution beam for adjusting the inclination slope. The adjustment components include threaded rods that can be raised and lowered at the bottom, and anti-loosening components are provided on the upper part of the threaded rods to prevent them from falling off.

[0007] Furthermore, this application also proposes that the threaded rod passes through and is fixed to the sleeve at the lower part of the bracket and is connected to the adjusting nut at the lower part, the lower part of the threaded rod extends to the bottom end of the sleeve and is connected to the base plate, and the top end of the threaded rod is connected to the anti-loosening component at the upper part.

[0008] Furthermore, this application also proposes that the anti-loosening component includes a tension spring, the top of which is hooked to a connecting ring fixed on the bracket, and the bottom of which is hooked to a hook fixed to the top of the threaded rod.

[0009] Furthermore, this application also proposes that the threaded rod is externally sleeved with a protective sleeve extending to the upper tension spring, the bottom of which extends downward to contact the adjusting nut.

[0010] Furthermore, this application also proposes that an inclined adjustment gap be left between the threaded rod and the sleeve to allow it to pass through the protective sleeve.

[0011] Compared with existing technologies, the advantages of this utility model are: by setting an adjustable height threaded rod and an anti-loosening component at the lower part of the bracket of the bottom formwork of the cap beam, this utility model realizes the flexible adjustment of the slope of the bottom formwork of the cap beam, solves the problem of needing to prepare a large number of templates with different slopes in traditional construction, and has the advantages of improving the turnover rate of templates, reducing material costs, and enhancing construction safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Enlarged schematic diagram of a local structure;

[0014] In the diagram: 1. Pier; 2. Bottom formwork of cap beam; 3. Bracket; 4. Support distribution beam; 5. Adjustment component; 6. Sleeve; 7. Threaded rod; 8. Base plate; 9. Adjusting nut; 10. Hook; 11. Tension spring; 12. Connecting ring; 13. Protective sleeve. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0016] like Figure 1-2 As shown, this application proposes a cap beam bottom formwork slope adjustment device, including a support distribution beam supported on the upper part of the bridge pier. Brackets are installed on the upper parts of both sides of the support distribution beam. An inclined cap beam bottom formwork is fixed on the upper part of the bracket. Several adjustment components are provided at the bottom of the bracket, which are supported on the upper part of the support distribution beam for adjusting the inclination slope. The adjustment component includes a threaded rod that can be raised and lowered at the lower part, and an anti-loosening component is provided on the upper part of the threaded rod to prevent it from falling off.

[0017] The support beams are typically constructed using I-beams or box girders, fixed to the upper part of the piers via a lower support frame. The brackets can be inclined frame structures welded from steel, with their upper parts fixed to the bottom formwork of the cap beam via bolts or welding. Adjustment components are spaced along the bottom of the brackets, with the spacing determined by the length and slope requirements of the cap beam, typically 50cm-100cm. The threaded rods can be standard trapezoidal threaded rods, and height adjustment is achieved through rotation. The anti-loosening components can employ a spring preload structure.

[0018] This device precisely adjusts the slope of the bottom formwork of the cap beam by changing the height of each support point of the bracket through the adjustment of the threaded rod of the component. The height adjustment of the threaded rod achieves millimeter-level precision to meet different cross slope requirements. The anti-loosening component effectively prevents the threaded rod from loosening in any environment, ensuring slope stability. Compared with existing fixed bottom formwork, this device, through its adjustable structure, allows a single bottom formwork to adapt to various slope requirements, significantly reducing the number of formwork panels and lowering construction costs. Furthermore, the adjustment process is simple to operate, requiring no disassembly of the formwork to complete the slope adjustment, thus improving construction efficiency.

[0019] Furthermore, this application also proposes that the threaded rod passes through and is fixed to the sleeve at the lower part of the bracket and is connected to the adjusting nut at the lower part, the lower part of the threaded rod extends to the bottom end of the sleeve and is connected to the base plate, and the top end of the threaded rod is connected to the anti-loosening component at the upper part.

[0020] Specifically, the adjusting nut can be a hexagonal nut, which allows the threaded rod to be adjusted up and down inside the sleeve by turning the adjusting nut with a wrench. The base plate can be a circular steel plate, which is fixed to the end of the threaded rod by welding or bolting to distribute the support pressure.

[0021] Therefore, this technical solution achieves height adjustment through the mating structure of the threaded rod and sleeve. The rotation of the adjusting nut drives the threaded rod up and down, thereby precisely controlling the support height of the bracket to adapt to different slope requirements. The base plate enhances support stability and prevents localized stress concentration. Compared with existing technologies, this structure simplifies the slope adjustment process, achieving millimeter-level precision adjustment through threaded transmission. Simultaneously, the anti-loosening design effectively prevents accidental displacement during construction, ensuring the stability of the cap beam's bottom formwork slope.

[0022] Furthermore, this application also proposes that the anti-loosening assembly includes a tension spring, the top of which is hooked to a connecting ring fixed on the bracket, and the bottom of which is hooked to a hook fixed to the top of the threaded rod.

[0023] The tension spring can be a helical compression spring or a tension spring, preferably made of 65Mn or 60Si2MnA spring steel. The connecting ring can be installed on the bracket by welding or bolting, and its structure can be an O-ring or a D-ring. The connection between the hook and the top of the threaded rod includes welding; the hook opening direction must be consistent with the spring tension direction to prevent disengagement. The protective sleeve can be made of rigid PVC tubing, and its inner diameter must be 1-2 mm larger than the outer diameter of the threaded rod to allow for movement clearance.

[0024] This technical solution maintains the axial tension of the threaded rod through spring preload, ensuring it remains taut and preventing it from detaching from the sleeve. When the threaded rod experiences slight displacement due to external forces, the spring absorbs energy through elastic deformation and automatically resets, maintaining continuous tension. Compared to traditional anti-loosening gasket structures, this solution offers self-adjustment capabilities, adapting to anti-loosening requirements under varying slope conditions. The protective sleeve not only prevents direct friction between the threaded rod and the sleeve, extending the service life of critical components, but also prevents grout contamination during subsequent concrete pouring, thus ensuring the integrity of the threaded rod and providing waterproofing and rust prevention. The entire assembly is simple and reliable; maintenance only requires checking the spring preload to determine its operational status.

[0025] Furthermore, this application also proposes that the threaded rod is externally sleeved with a protective sleeve extending to the upper tension spring, the bottom of which extends downward to contact the adjusting nut.

[0026] The protective sleeve can be made of rigid PVC tubing. The inner diameter of the protective sleeve is slightly larger than the outer diameter of the threaded rod, forming a sliding fit. The top of the protective sleeve extends to the tension spring area, forming a protective enclosure for the spring. The bottom of the protective sleeve extends to completely cover the threaded rod portion inside the sleeve, typically extending to contact the upper surface of the adjusting nut.

[0027] This technical solution effectively prevents damage to the threaded rod and avoids abnormal thread wear by installing a protective sleeve on the outside of the threaded rod. The protective sleeve extends upward to cover the tension spring, preventing spring corrosion and foreign object entanglement. The contact arrangement between the protective sleeve and the adjusting nut ensures that the protection range covers the entire working area of ​​the thread. Therefore, this structure significantly improves the environmental adaptability and service life of the adjusting assembly, and solves the technical problem of threaded components being easily contaminated and damaged in open-air construction environments.

[0028] Furthermore, this application also proposes that an inclined adjustment gap be left between the threaded rod and the sleeve to allow for penetration of the protective sleeve.

[0029] The tilt adjustment gap allows the protective sleeve to move freely between the threaded rod and the sleeve, preventing friction or jamming between the protective sleeve and the threaded rod or sleeve. Simultaneously, when adjusting the height of the threaded rod, this gap can also accommodate the tilt angle of the threaded rod and the sleeve. The spacing of this tilt adjustment gap can be set within the range of 3-5mm, ensuring smooth passage of the protective sleeve while preventing excessive gap from causing wobbling or displacement. As a preferred embodiment, the passage gap can be set to 3mm to balance the freedom of movement and stability of the protective sleeve.

[0030] This technical solution solves the friction and jamming problems that may be encountered when the protective sleeve moves between the threaded rod and the sleeve by setting a specific size of the crossing gap. As a result, the protective sleeve can extend more smoothly onto the tension spring, effectively protecting the threaded rod and tension spring from external environmental influences. Compared with existing technologies, this solution improves the reliability and service life of the protective sleeve while ensuring protective effectiveness, and reduces the frequency of maintenance and replacement. Specifically, the precise control of the crossing gap makes the installation and operation of the protective sleeve more stable, thereby improving the durability and ease of operation of the entire slope adjustment device.

[0031] The implementation principle of the slope adjustment device for the bottom formwork of a cap beam in this embodiment is as follows:

[0032] During on-site construction, the sleeves 6 are first welded to each layer of the support frame of the bottom formwork of the cap beam, with the same spacing as the distribution beam. The trapezoidal threaded rod 7 is firmly welded to the base plate 8. The trapezoidal threaded rod 7 and the outer protective sleeve 13 are inserted into the fixed sleeve. The adjusting nut 9 is screwed onto the bottom of the threaded rod 7. Then, the tension spring 11 is connected to prevent the threaded rod 7 from loosening.

[0033] During on-site construction, the bottom formwork 2 of the cap beam, together with the adjustment device, is hoisted and installed onto the distribution beam 4 of the support. First, the plane position of the bottom formwork 2 of the cap beam is adjusted to ensure that each base of the adjustment device is effectively supported on the distribution beam 4. The threaded rods 7 of the four corner adjustment devices of the bottom formwork 2 of the cap beam are adjusted to make the slope of the cap beam meet the design requirements. The bolts of other devices are adjusted one by one to ensure that all support points are evenly stressed. After the adjustment is completed, the slope of the bottom formwork of the cap beam is checked again.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A slope adjustment device for the bottom formwork of a cap beam, comprising a support distribution beam (4) supported on the upper part of a pier (1), wherein brackets (3) are installed on the upper parts of both sides of the support distribution beam (4), and an inclined bottom formwork (2) of the cap beam is fixedly supported on the upper part of the brackets (3), characterized in that: The bottom of the bracket (3) is provided with several adjustment components (5) that are supported on the upper part of the bracket distribution beam (4) for adjusting the tilt slope. The adjustment component (5) includes a threaded rod (7) at the bottom that can be raised and lowered, and an anti-loosening component is provided at the upper part of the threaded rod (7) to prevent it from falling off.

2. The slope adjustment device for the bottom formwork of a cap beam according to claim 1, characterized in that: The threaded rod (7) passes through the sleeve (6) fixed at the lower part of the bracket (3) and is connected to the adjusting nut (9) at the lower part. The lower part of the threaded rod (7) extends to the bottom end of the sleeve (6) and is connected to the base plate (8). The top end of the threaded rod (7) is connected to the upper anti-loosening component.

3. The slope adjustment device for the bottom formwork of a cap beam according to claim 2, characterized in that: The anti-loosening component includes a tension spring (11), the top of which is attached to a connecting ring (12) fixed on the bracket (3), and the bottom of which is attached to a hook (10) fixed on the top of the threaded rod (7).

4. The slope adjustment device for the bottom formwork of a cap beam according to claim 3, characterized in that: The threaded rod (7) is fitted with a protective sleeve (13) that extends to the upper tension spring (11), and the bottom of the protective sleeve (13) extends downward to contact the adjusting nut (9).

5. The slope adjustment device for the bottom formwork of a cap beam according to claim 3, characterized in that: There is an inclined adjustment gap between the threaded rod (7) and the sleeve (6) for passing through the protective sleeve (13).

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