Tension releasing and unloading device of cantilever beam prestressed structure

Abstract

The utility model provides a releasing and unloading device of a cantilever beam prestressed structure, which belongs to the technical field of bridge construction and comprises an unloading block, the unloading block consists of an upper support, a lower support, a left support and a right support, a first through hole is horizontally formed in the middle of the left support, a second through hole is horizontally formed in the middle of the right support, and the releasing and unloading device further comprises a steel strand. The steel strand penetrates through the first through hole and the second through hole in a sliding mode, and the tension releasing and unloading device of the cantilever beam prestress structure solves the problems that in construction of an existing bridge cantilever beam, a supporting and fixing device for the cantilever beam is lacked, and potential safety hazards of instability exist in the construction process of workers.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and in particular relates to a tensioning and unloading device for a cantilever beam prestressed structure. Background Art

[0002] A bridge generally refers to a structure built across rivers, lakes, and seas to enable vehicles and pedestrians to pass smoothly. To adapt to the modern high-speed development of the transportation industry, a bridge is also extended to refer to a building that is built to cross mountain streams, adverse geological conditions, or meet other transportation needs to make travel more convenient.

[0003] At present, the construction of cantilever beams on existing bridges lacks supporting and fixing devices for the cantilever beams, which poses a safety hazard of instability to workers during construction. Therefore, a tensioning and unloading device for the prestressed structure of the cantilever beam is needed to solve this problem. Utility Model Content

[0004] To achieve the above-mentioned purpose, the utility model provides a tensioning and unloading device for a cantilever beam prestressed structure, comprising an unloading block, the unloading block being composed of an upper support, a lower support, a left support and a right support;

[0005] A first through hole is horizontally opened in the middle of the left support, a second through hole is horizontally opened in the middle of the right support, and a steel strand is also included. The steel strand slides through the first through hole and the second through hole.

[0006] Furthermore, an anchor is provided on the right side of the right support at the opening of the second through hole, and the steel strand passes through the anchor.

[0007] Furthermore, the upper support and the lower support are located between the left support and the right support, and the size specifications of the upper support and the lower support are smaller than the size specifications of the left support and the right support.

[0008] Furthermore, the vertical cross-sections of the upper support, the lower support, the left support, and the right support are all isosceles trapezoids;

[0009] The left isosceles surface of the upper support is slidably fitted with the upper isosceles surface of the left support, and the right isosceles surface of the upper support is slidably fitted with the upper isosceles surface of the right support;

[0010] The left isosceles surface of the lower support is slidably fitted with the lower isosceles surface of the left support, and the right isosceles surface of the lower support is slidably fitted with the lower isosceles surface of the right support.

[0011] Furthermore, it also includes a screw rod, which vertically passes through the upper support and the lower support in sequence, and the screw rod is threadedly connected to the upper support and the lower support. Nuts are threadedly sleeved on both ends of the screw rod, and the two nuts are respectively in contact with the upper support and the lower support.

[0012] The advantages of the utility model are: the utility model provides a tensioning and unloading device for a cantilever beam prestressed structure, which solves the problem that the construction of the cantilever beam of the existing bridge lacks a supporting and fixing device for the cantilever beam, and there is a safety hazard of instability for workers during construction.

[0013] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the utility model.

[0015] Figure 2 It is an enlarged view of the structure of point A of the present utility model.

[0016] Figure 3 It is a structural schematic diagram of the unloading block of the utility model.

[0017] Explanation of the accompanying reference numerals: 1. unloading block; 11. upper support; 12. lower support; 13. left support; 14. right support; 2. first through hole; 3. second through hole; 4. steel strand; 5. anchor; 6. screw; 7. nut. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0022] Example 1

[0023] This embodiment provides Figures 1 to 3 The present invention shows a tensioning and unloading device for a cantilever beam prestressed structure, comprising a unloading block 1, which is composed of an upper support 11, a lower support 12, a left support 13, and a right support 14. The upper support 11 and the lower support 12 are located between the left support 13 and the right support 14, and the dimensions of the upper support 11 and the lower support 12 are smaller than those of the left support 13 and the right support 14.

[0024] The vertical cross-sections of the upper support 11, the lower support 12, the left support 13 and the right support 14 are all isosceles trapezoids; the left isosceles surface of the upper support 11 is slidably fitted with the upper isosceles surface of the left support 13, and the right isosceles surface of the upper support 11 is slidably fitted with the upper isosceles surface of the right support 14; the left isosceles surface of the lower support 12 is slidably fitted with the lower isosceles surface of the left support 13, and the right isosceles surface of the lower support 12 is slidably fitted with the lower isosceles surface of the right support 14;

[0025] The screw rod 6 is further comprised of a screw rod 6 which vertically passes through the upper support 11 and the lower support 12 in sequence, and is threadedly connected to the upper support 11 and the lower support 12. Nuts 7 are threadedly sleeved on both ends of the screw rod 6, and the two nuts 7 are respectively in contact with the upper support 11 and the lower support 12;

[0026] A first through hole 2 is horizontally opened in the middle of the left support 13, and a second through hole 3 is horizontally opened in the middle of the right support 14. It also includes a steel strand 4, which slides through the first through hole 2 and the second through hole 3. An anchor 5 is provided at the right side of the right support 14 at the mouth of the second through hole 3, and the steel strand 4 passes through the anchor 5.

[0027] When in use, first assemble the unloading block 1, then fix the left side of the left support 13 of the unloading block 1 on the wall column, then preset the installation opening of the anchor 5 at the second through hole 3 on the right side of the right support 14, and place the anchor 5, use one end of the steel strand 4 to fix it with the cantilever beam, and the other end passes through the wall column, the left support 13 and the right support 14 in sequence, and then pull the steel strand 4 to make the steel strand 4 tension and support the cantilever beam, thereby playing the role of fixed support for the cantilever beam, thereby increasing the support stability of the cantilever beam during bridge construction;

[0028] When unloading is required, the screw rod 6 is rotated slowly and evenly to drive the upper support 11 and the lower support 12 to move away from each other, thereby unloading the unloading block 1, thereby achieving unloading, that is, the tensioning of the prestressed tendons.

[0029] In summary, the utility model provides a tensioning and unloading device for a cantilever beam prestressed structure, which solves the problem that the construction of the cantilever beam of the existing bridge lacks a supporting and fixing device for the cantilever beam, and there is a safety hazard of instability for workers during construction.

[0030] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A tensioning and unloading device for a cantilever beam prestressed structure, characterized by: The unloading block (1) is composed of an upper support (11), a lower support (12), a left support (13) and a right support (14); The left support (13) has a first through hole (2) horizontally opened in the middle, the right support (14) has a second through hole (3) horizontally opened in the middle, and further comprises a steel strand (4), wherein the steel strand (4) slides through the first through hole (2) and the second through hole (3).

2. The tensioning and unloading device for a cantilever beam prestressed structure according to claim 1, characterized in that: An anchor (5) is provided on the right side of the right support (14) at the mouth of the second through hole (3), and the steel strand (4) passes through the anchor (5).

3. The tensioning and unloading device for a cantilever beam prestressed structure according to claim 1, characterized in that: The upper support (11) and the lower support (12) are located between the left support (13) and the right support (14), and the size specifications of the upper support (11) and the lower support (12) are smaller than the size specifications of the left support (13) and the right support (14).

4. The tensioning and unloading device for a cantilever beam prestressed structure according to claim 3, characterized in that: The vertical cross-sections of the upper support (11), the lower support (12), the left support (13) and the right support (14) are all isosceles trapezoids; The left isosceles surface of the upper support (11) is slidably fitted with the upper isosceles surface of the left support (13), and the right isosceles surface of the upper support (11) is slidably fitted with the upper isosceles surface of the right support (14); The left isosceles surface of the lower support (12) is slidably fitted with the lower isosceles surface of the left support (13), and the right isosceles surface of the lower support (12) is slidably fitted with the lower isosceles surface of the right support (14).

5. The tensioning and unloading device for a cantilever beam prestressed structure according to claim 4, characterized in that: The invention also includes a screw rod (6), which vertically passes through the upper support (11) and the lower support (12) in sequence, and the screw rod (6) is threadedly connected to the upper support (11) and the lower support (12). Both ends of the screw rod (6) are threadedly sleeved with nuts (7), and the two nuts (7) are respectively in contact with the upper support (11) and the lower support (12).

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