Cover beam prestressed steel strand tensioning protection jig

Abstract

The utility model belongs to bridge construction technical field discloses a kind of bent cap prestressed steel strand tensioning protection jig frame. Bent cap prestressed steel strand tensioning protection jig frame includes support assembly, placing assembly, protection assembly and traction assembly, support assembly is placed on the construction platform of bent cap for supporting placing assembly, protection assembly and traction assembly;Placing assembly includes sliding plate, and sliding plate is slidably connected in support assembly along first direction;Protection assembly includes two guide pieces and a protection plate, two guide pieces extend along first direction and are spaced apart along vertical direction, and the both ends of guide piece are fixedly connected in support assembly, and protection plate is slidably connected in guide piece along first direction;Traction assembly is used to pull hydraulic jack, and hydraulic jack is used to tension the steel strand of bent cap. The utility model can improve construction efficiency, reduce safety risk.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a protective frame for tensioning prestressed steel strands in a cap beam. Background Technology

[0002] In bridge engineering, the cap beam, as the core load-bearing component connecting the piers and the superstructure, directly determines the overall stability and service life of the bridge. Applying prestress to the cap beam is key to improving its bending and crack resistance and extending its service life. Because the cap beam is located at a high elevation, tensioning operations require heavy equipment such as jacks. Therefore, a tensioning frame is often used for assistance during the tensioning process. The tensioning frame serves as a support for operations, equipment positioning, and safety protection.

[0003] However, the existing jigs do not integrate a dedicated working platform, requiring additional scaffolding to be erected, which reduces construction efficiency. When transporting jacks, construction workers need to carry them, which is labor-intensive and poses safety hazards due to high-altitude handling. In addition, the lack of a protective structure means that the prestressed steel strands will accumulate huge elastic potential energy during the tensioning process. Once the anchor breaks or the prestressed steel strand breaks, the stored energy will be released instantly, and the broken prestressed steel strand will be ejected instantly, seriously threatening the lives of construction workers and posing a huge safety hazard. Utility Model Content

[0004] The purpose of this utility model is to provide a protective frame for tensioning prestressed steel strands in cap beams, thereby improving construction efficiency and reducing safety risks.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A tensioning and protective frame for prestressed steel strands in a cap beam, comprising:

[0007] The support assembly includes multiple vertical support rods and multiple horizontal support rods. The vertical support rods extend vertically and are arranged in a rectangular array. The bottom end of each vertical support rod is fixedly connected to the construction platform of the cap beam. The horizontal support rods include first horizontal support rods and second horizontal support rods. Multiple first horizontal support rods extend along a first direction and are spaced apart along a second direction. The two ends of each first horizontal support rod are fixedly connected to the vertical support rods. Multiple second horizontal support rods extend along the second direction and are spaced apart along the first direction. The two ends of each second horizontal support rod are fixedly connected to the vertical support rods. The first direction is perpendicular to the second direction.

[0008] The placement component includes a sliding plate that is slidably connected to the first transverse support rod along the first direction;

[0009] The protective assembly includes two guide members and a protective plate. The two guide members extend along the first direction and are spaced apart in the vertical direction. The two ends of the guide members are respectively fixedly connected to the vertical support rod, and the protective plate is slidably connected to the guide members along the first direction.

[0010] The traction assembly includes a load-bearing component, a sliding block, and a hand-operated hoist. The load-bearing component is fixedly connected to the top of the vertical support rod. The sliding block is slidably connected to the load-bearing component along the first direction. The hand-operated hoist is fixedly connected to the sliding block and is capable of pulling a hydraulic jack for tensioning the steel strands of the cap beam.

[0011] The aforementioned prestressed steel strand tensioning protective frame for the cap beam includes a first vertical support rod and a second vertical support rod. The second vertical support rod slides vertically on the first vertical support rod, and the top of the first vertical support rod is lower than the bottom of the protective plate.

[0012] The aforementioned prestressed steel strand tensioning protective frame for the cap beam comprises two angle steels. The two angle steels extend along the first direction and are spaced apart along the second direction. The sliding block overlaps the two angle steels and can slide along the first direction through the gap between the two angle steels.

[0013] The aforementioned prestressed steel strand tensioning protective frame for the cap beam includes a traction assembly that further comprises two limiting members extending along the second direction, one of which is fixedly connected to one end of the two angle steels, and the other of which is fixedly connected to the other end of the two angle steels.

[0014] The aforementioned prestressed steel strand tensioning protective frame for the cap beam has a first guide groove on the upper guide member along the first direction, and a second guide groove on the lower guide member along the first direction. The top end of the protective plate is slidably connected to the first guide groove and the top end of the protective plate is slidably connected to the second guide groove.

[0015] The aforementioned prestressed steel strand tensioning protective frame for the cap beam includes a first guide groove and a second guide groove that are T-shaped grooves, with their openings facing each other.

[0016] The aforementioned prestressed steel strand tensioning protective frame for the cap beam includes a first transverse support rod with a third guide groove extending along the first direction, and a sliding plate sliding in the third guide groove.

[0017] The aforementioned prestressed steel strand tensioning protective frame for the cap beam includes a support assembly comprising two first transverse support rods, each first transverse support rod having a third guide groove at its top end, and a sliding plate having two guide sliders at its bottom end, each guide slider correspondingly sliding in one of the two third guide grooves.

[0018] The aforementioned prestressed steel strand tensioning protective frame for the cap beam includes a fixing plate, which is fixedly connected to one end of the first transverse support rod near the vertical support rod.

[0019] The aforementioned prestressed steel strand tensioning protective frame for the cap beam has a mounting plate fixedly connected to the bottom end of the vertical support rod, and the mounting plate is fixedly connected to the construction platform.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a prestressed steel strand tensioning protective frame for cap beams. The support component, placement component, protective component, and traction component are fixedly connected as a single unit. During construction, it can be lifted to the construction platform by crane for fixing, eliminating the need for on-site scaffold assembly, reducing construction steps, and improving construction efficiency. During the tensioning of the steel strands, the protective plate can slide, positioning it at the end of the steel strand. Construction workers stand behind the steel strand; if the steel strand breaks and pops out, it will impact the protective plate, preventing injury to the workers and improving construction safety. Simultaneously, the sliding block slides on the load-bearing component and is connected to a hand-operated hoist. The hand-operated hoist can be connected to a jack and moved along the load-bearing component to the position of the steel strand, avoiding manual handling and reducing labor intensity. Furthermore, the support component uses rod assembly, which reduces its weight and facilitates lifting, further improving construction efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the prestressed steel strand tensioning protective frame for the cap beam provided in this embodiment of the utility model from a first-view perspective;

[0023] Figure 2 This is a schematic diagram of the prestressed steel strand tensioning protective frame for the cap beam provided in this embodiment of the utility model from a second perspective.

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a schematic diagram of the prestressed steel strand tensioning protective frame for the cap beam provided in this embodiment of the utility model from a third-person perspective.

[0026] Figure 5 This is a schematic diagram of the traction assembly provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Support assembly; 11. Vertical support rod; 12. Horizontal support rod; 121. First horizontal support rod 12; 122. Second horizontal support rod 12;

[0029] 2. Component placement; 21. Sliding plate; 22. Fixing plate;

[0030] 3. Protective components; 31. Guide components; 32. Protective plates;

[0031] 4. Traction assembly; 41. Load-bearing component; 42. Sliding block; 43. Hand chain hoist; 44. Limiting component. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1-5As shown, the prestressed steel strand tensioning protective frame for the cap beam includes a support assembly 1, a placement assembly 2, a protective assembly 3, and a traction assembly 4. The support assembly 1 includes multiple vertical support rods 11 and multiple horizontal support rods 12. The vertical support rods 11 extend vertically and are arranged in a rectangular array. The bottom ends of the vertical support rods 11 are fixedly connected to the construction platform of the cap beam. The horizontal support rods 12 include first horizontal support rods 121 and second horizontal support rods 122. The multiple first horizontal support rods 121 extend along a first direction and are spaced apart along a second direction. The two ends of the first horizontal support rods 121 are respectively fixedly connected to the vertical support rods 11. The multiple second horizontal support rods 122 extend along the second direction and are spaced apart along the first direction. The two ends of the second horizontal support rods 122 are respectively fixedly connected to the vertical support rods 11. The first direction is perpendicular to the second direction; the placement component 2 includes a sliding plate 21, which is slidably connected to the first transverse support rod 121 along the first direction; the protective component 3 includes two guide members 31 and a protective plate 32, the two guide members 31 extend along the first direction and are spaced apart in the vertical direction, the two ends of the guide members 31 are respectively fixedly connected to the vertical support rod 11, and the protective plate 32 is slidably connected to the guide members 31 along the first direction; the traction component 4 includes a load-bearing component 41, a sliding block 42 and a hand-operated hoist 43, the load-bearing component 41 is fixedly connected to the top of the vertical support rod 11, the sliding block 42 is slidably connected to the load-bearing component 41 along the first direction, and the hand-operated hoist 43 is fixedly connected to the sliding block 42. The hand-operated hoist 43 can pull a hydraulic jack, which is used to tension the steel strands of the cap beam. The first direction is as follows: Figure 1 As shown in the X direction, the second direction is as follows: Figure 2 Shown in the Y direction.

[0037] The prestressed steel strand tensioning protective frame for cap beams provided by this utility model integrates a support component 1, a placement component 2, a protective component 3, and a traction component 4 into a single unit. During construction, it can be hoisted to the construction platform by a crane for fixation, eliminating the need for on-site scaffold assembly, reducing construction steps, and improving construction efficiency. During the tensioning of the steel strand, the protective plate 32 can be slidable, positioning it at the end of the steel strand. Construction workers stand behind the steel strand; if the steel strand breaks and pops out, it will impact the protective plate 32, preventing injury to the workers and improving construction safety. Simultaneously, the sliding block 42 slides on the load-bearing component 41 and is connected to a hand-operated hoist 43. The hand-operated hoist 43 can be connected to a jack and moved along the load-bearing component 41 to the position of the steel strand, avoiding manual handling and reducing labor intensity. Furthermore, the support component 1 is assembled from rods, reducing its weight and facilitating hoisting, further improving construction efficiency.

[0038] The support component 1 can be of fixed height or height adjustable. For example, the vertical support rod 11 includes a first vertical support rod and a second vertical support rod. The second vertical support rod slides vertically on the first vertical support rod. The top of the first vertical support rod is lower than the bottom of the protective plate 32. The height of the protective plate 32 can be adjusted during lifting so that the protective plate 32 can protect the steel strands at different heights on the cap beam.

[0039] Specifically, the first vertical support rod has a first through hole, and the second vertical support rod has multiple second through holes along the vertical direction. The second through holes can be selectively aligned with the first through holes, and the limiting pin is inserted into the first and second through holes to fix the first and second vertical support rods.

[0040] In other embodiments, the first vertical support rod has a plurality of first through holes along the vertical direction, and the second vertical support rod has a second through hole.

[0041] The load-bearing component 41 can be plate-shaped. The load-bearing component 41 is fixedly connected to the top of the support assembly 1, and the load-bearing component 41 has a groove for sliding connection of the slider.

[0042] In this embodiment, the load-bearing component 41 consists of two angle steels. The two angle steels extend along a first direction and are spaced apart along a second direction. The sliding block 42 overlaps the two angle steels and can slide along the gap between the two angle steels in the first direction. The angle steels are readily available, which reduces construction costs, and they can be welded to the vertical support rod 11, making the connection convenient.

[0043] Further, see Figure 2 , Figure 4 and Figure 5 The traction assembly 4 also includes two limiting members 44 extending along the second direction. One limiting member 44 is fixedly connected to one end of the two angle steels, and the other limiting member 44 is fixedly connected to the other end of the two angle steels. The limiting member 44 can prevent the sliding block 42 from sliding out of the gap between the two angle steels, thus preventing the jack from falling and improving the safety of the construction process.

[0044] Specifically, the limiting member 44 can be a steel plate, which is welded and fixed to both ends of the angle steel.

[0045] This embodiment does not specifically limit the shape of the guide member 31. For example, the guide member 31 is plate-shaped, which facilitates the opening of a slot on the guide member 31 for sliding connection of the sliding plate 21.

[0046] Specifically, see Figure 1The upper guide member 31 has a first guide groove along the first direction, and the lower guide member 31 has a second guide groove along the first direction. The top end of the protective plate 32 is slidably connected to the first guide groove, the bottom end of the protective plate 32 is slidably connected to the second guide groove, and both the first and second guide grooves can limit the movement of the protective plate 32, improving connection stability. This prevents the connection from failing and the protective plate 32 from falling off due to the steel strand impacting the protective plate 32, thus improving safety.

[0047] Specifically, the first guide groove and the second guide groove are T-shaped grooves, and the openings of the first guide groove and the second guide groove are arranged opposite to each other. The T-shaped groove can limit the protective plate 32 in the vertical direction, further improving the connection stability.

[0048] Correspondingly, the top and bottom of the protective plate 32 are provided with T-shaped sliding parts. During installation, the protective plate 32 can be positioned first, the upper guide 31 can be inserted through one end of the protective plate 32 and welded to the vertical support rod 11, and then the lower guide 31 can be inserted and welded to the vertical support rod 11.

[0049] In other embodiments, the first guide groove and the second guide groove may also be in the shape of a dovetail groove or a wedge groove.

[0050] In other embodiments, the protective plate 32 and the guide member 31 can also be connected by rollers to make the movement smoother.

[0051] In other embodiments, the guide member 31 can also be an angle steel, with the protective plate 32 sliding in the joint gap between the two angle steels. Alternatively, the angle steel and the square steel can be joined together, with the protective plate 32 sliding in the joint gap between the angle steel and the square steel.

[0052] The sliding plate 21 is used to place construction tools. In order to improve construction efficiency, the sliding plate 21 can slide to transport construction tools to the construction position, avoiding repeated picking and putting by construction personnel, reducing the labor intensity of construction personnel and improving construction efficiency.

[0053] For example, the first transverse support rod 121 is provided with a third guide groove, which extends along the first direction. The sliding plate 21 slides in the third guide groove. The third guide groove can improve the precise guidance of the sliding plate 21, prevent the sliding plate 21 from deviating and getting stuck, and improve the smoothness of movement.

[0054] The third guide groove can be formed at the top of the first transverse support rod 121 or on the side of the first transverse support rod 121. For example, the support assembly 1 includes two first transverse support rods 121, and the top of each first transverse support rod 121 is provided with a third guide groove. The bottom of the sliding plate 21 is provided with two guide sliders, and each guide slider slides in the two third guide grooves in a one-to-one correspondence, which facilitates the connection between the first transverse support rod 121 and the sliding plate 21, improves the assembly efficiency, and thus improves the construction efficiency.

[0055] Specifically, the third guide groove can be a T-shaped groove, a dovetail groove, or a wedge-shaped groove.

[0056] In other embodiments, the sliding plate 21 may have a third guide groove along the first direction, and the first transverse support rod 121 may be disposed in the third guide groove, so that the sliding plate 21 overlaps the first transverse support rod 121 and can slide on the first transverse support rod 121.

[0057] In other embodiments, the sliding plate 21 may be connected to the first transverse support rod 121 via rollers.

[0058] For temporary storage of construction tools, see [reference needed] in this embodiment. Figure 1 The placement component 2 also includes a fixing plate 22, which is fixedly connected to one end of the first horizontal support rod 121 near the vertical support rod 11. This fixing plate can temporarily store the jack, which can then be hoisted to the steel strand position by the hand-operated hoist 43, improving construction efficiency. The sliding plate 21 can store small construction tools, making them easy for construction workers to access.

[0059] In order to improve the connection stability between the prestressed steel strand tensioning protective frame and the construction platform, in this embodiment, the bottom end of the vertical support rod 11 is fixedly connected to the mounting plate, which is fixedly connected to the construction platform to increase the contact area and thus improve the connection stability.

[0060] Each vertical support rod 11 can have a mounting plate connected to its bottom end, or all vertical support rods 11 can be connected to the same mounting plate, depending on the on-site construction requirements.

[0061] The mounting plate can be connected to the construction platform using existing bolts. The bolt connection is convenient, and the plate can be disassembled and reused, reducing costs and improving efficiency.

[0062] The steps for using the prestressed steel strand tensioning protective frame for the cap beam provided by this utility model are as follows: S1. Assemble the prestressed steel strand tensioning protective frame for the cap beam on the ground and check its integrity; S2. Use a truck crane to lift the prestressed steel strand tensioning protective frame for the cap beam to the prestressed steel strand tensioning position at the top of the cap beam; S3. The operator stands on the top of the cap beam and, together with the truck crane, places the jack on the fixed plate 22, while the other construction tools are placed on the sliding plate 21; S4. Push the sliding block. 42. Move the hand-operated hoist 43 to lift the jack to the front of the first tensioning anchor point; S5. The worker stands behind the protective plate 32 and begins the tensioning operation; S6. After completing the tensioning of one anchor point, push the sliding block 42 to lift the jack to the next tensioning anchor point and perform the tensioning operation. Repeat the operation until all tensioning anchor points are completed; S7. Lift the prestressed steel strand tensioning protective frame of the cap beam to the top of the next section of the cap beam for tensioning operation or transport it to the ground for standby.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tensioning and protective frame for prestressed steel strands in a cap beam, characterized in that, include: The support assembly (1) includes multiple vertical support rods (11) and multiple horizontal support rods (12). The vertical support rods (11) extend vertically and are arranged in a rectangular array. The bottom end of the vertical support rods (11) is fixedly connected to the construction platform of the cap beam. The horizontal support rods (12) include a first horizontal support rod (121) and a second horizontal support rod (122). Multiple first horizontal support rods (121) extend along a first direction and are spaced apart along a second direction. The two ends of the first horizontal support rods (121) are respectively fixedly connected to the vertical support rods (11). Multiple second horizontal support rods (122) extend along the second direction and are spaced apart along the first direction. The two ends of the second horizontal support rods (122) are respectively fixedly connected to the vertical support rods (11). The first direction is perpendicular to the second direction. The placement component (2) includes a sliding plate (21) which is slidably connected to the first transverse support rod (121) along the first direction. The protective component (3) includes two guide members (31) and a protective plate (32). The two guide members (31) extend along the first direction and are spaced apart along the vertical direction. The two ends of the guide members (31) are respectively fixedly connected to the vertical support rod (11). The protective plate (32) is slidably connected to the guide members (31) along the first direction. The traction assembly (4) includes a load-bearing component (41), a sliding block (42), and a hand-operated hoist (43). The load-bearing component (41) is fixedly connected to the top of the vertical support rod (11). The sliding block (42) is slidably connected to the load-bearing component (41) along the first direction. The hand-operated hoist is fixedly connected to the sliding block (42). The hand-operated hoist (43) can pull a hydraulic jack, which is used to tension the steel strands of the cap beam.

2. The prestressed steel strand tensioning protective frame for cap beams according to claim 1, characterized in that, The vertical support rod (11) includes a first vertical support rod and a second vertical support rod. The second vertical support rod slides vertically on the first vertical support rod, and the top of the first vertical support rod is lower than the bottom of the protective plate (32).

3. The prestressed steel strand tensioning protective frame for cap beams according to claim 1, characterized in that, The load-bearing component (41) consists of two angle steels, which extend along the first direction and are spaced apart along the second direction. The sliding block (42) overlaps the two angle steels and can slide along the gap between the two angle steels along the first direction.

4. The prestressed steel strand tensioning protective frame for cap beams according to claim 3, characterized in that, The traction assembly (4) further includes two limiting members (44) extending along the second direction, one of the limiting members (44) being fixedly connected to one end of the two angle steels, and the other limiting member (44) being fixedly connected to the other end of the two angle steels.

5. The prestressed steel strand tensioning protective frame for cap beams according to claim 1, characterized in that, The upper guide member (31) has a first guide groove along the first direction, and the lower guide member (31) has a second guide groove along the first direction. The top end of the protective plate (32) is slidably connected to the first guide groove, and the top end of the protective plate (32) is slidably connected to the second guide groove.

6. The tensioning protective frame for prestressed steel strands in the cap beam according to claim 5, characterized in that, The first guide groove and the second guide groove are T-shaped grooves, and the openings of the first guide groove and the second guide groove are arranged opposite to each other.

7. The tensioning protective frame for prestressed steel strands in a cap beam according to claim 1, characterized in that, The first transverse support rod (121) has a third guide groove, which extends along the first direction, and the sliding plate (21) slides in the third guide groove.

8. The prestressed steel strand tensioning protective frame for cap beams according to claim 7, characterized in that, The support assembly (1) includes two first transverse support rods (121), each first transverse support rod (121) has a third guide groove at its top end, and the bottom end of the sliding plate (21) is provided with two guide sliders, each guide slider sliding in one-to-one correspondence with the two third guide grooves.

9. The tensioning protective frame for prestressed steel strands in a cap beam according to any one of claims 1-8, characterized in that, The placement assembly (2) also includes a fixing plate, which is fixedly connected to one end of the first horizontal support rod (121) near the vertical support rod (11).

10. The prestressed steel strand tensioning protective frame for cap beams according to any one of claims 1-8, characterized in that, The bottom end of the vertical support rod (11) is fixedly connected to the mounting plate, and the mounting plate is fixedly connected to the construction platform.

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