A tensioning device for anti-floating anchor rod prestressed reinforcement

Abstract

The utility model discloses a kind of tensioning equipment of anti-floating anchor rod prestressed reinforcement, belong to prestressed reinforcement post-tensioning technique field, including support, prestressed reinforcement is arranged in the support, jack is arranged in the upper portion of the support, limit thick steel plate is arranged on the jack, locking nut is arranged on the upper portion of the limit thick steel plate, connector is connected below the prestressed reinforcement, anti-floating anchor rod reinforcement is connected below the connector.The utility model uses the tensioning equipment of anti-floating anchor rod prestressed reinforcement described above, anti-floating anchor rod reinforcement is connected by connector and prestressed reinforcement, anti-floating anchor rod reinforcement is tensioned by setting jack on the upper portion of support, anti-floating anchor rod reinforcement is locked by locking nut and limit thick steel plate, prestress locking is carried out using the locking nut of anti-floating anchor rod, the risk of reducing prestress loss is reduced while realizing the convenient stretching of anti-floating anchor rod reinforcement, reducing material waste.

Description

Technical Field

[0001] This utility model relates to the field of post-tensioning technology for prestressed steel bars, and in particular to a tensioning device for prestressed steel bars for anti-buoyancy anchor rods. Background Technology

[0002] Anti-buoyancy anchors are components used in building engineering to resist structural buoyancy. Through anchoring with the foundation soil, they balance the buoyancy force exerted by groundwater on the structure, preventing it from floating, cracking, or failing, thus ensuring the stability and safety of underground engineering projects. During the construction of anti-buoyancy anchors, prestressing tensioning allows the anchor to generate pre-stress in advance, enhancing its pull-out bearing capacity.

[0003] Generally, tensioning of anti-buoyancy anchor bolts is carried out using equipment such as jacks and anchor clamps. For tensioning of prestressed steel bars, locking components such as steel pads and nuts are also required. After tensioning to the design stress, the prestress is locked by tightening the nuts to complete the tensioning operation.

[0004] This method of tensioning equipment cannot meet the needs of prestressed steel bar tensioning. Steel bar tensioning requires locking the nut with a ring, which is inconvenient to operate and difficult to ensure the tightness, which can easily lead to prestress loss. Steel bars need to be reserved for post-tensioning. After tensioning, they cannot be recycled, resulting in material waste.

[0005] Therefore, there is an urgent need for a new type of tensioning equipment that is convenient to construct and saves costs. Summary of the Invention

[0006] The purpose of this invention is to provide a tensioning device for prestressed steel bars of anti-buoyancy anchor rods. The device connects the prestressed steel bars to the anti-buoyancy anchor rods via connectors, and tensions the anti-buoyancy anchor rods by setting jacks above the support. During tensioning, the anti-buoyancy anchor rods are locked by locking nuts and limiting thick steel plates, thereby achieving convenient tensioning of the anti-buoyancy anchor rods, reducing material waste, and minimizing the risk of prestress loss.

[0007] To achieve the above objectives, this utility model provides a tensioning device for prestressed steel bars of anti-buoyancy anchor rods, including a support frame, in which prestressed steel bars are arranged, a jack is arranged above the support frame, a limiting steel plate is arranged on the jack, a locking nut is arranged above the limiting steel plate, a connector is connected below the prestressed steel bars, and an anti-buoyancy anchor rod is connected below the connector.

[0008] Preferably, the bracket includes a bracket column, a bracket brace, a support base, and a support top.

[0009] Preferably, the support base is disposed at the bottom end of the bracket, the support top seat is disposed at the top end of the bracket, the two ends of the bracket column are respectively connected to the support top seat and the support base, and the bracket diagonal brace is disposed obliquely between two adjacent bracket columns.

[0010] Preferably, the prestressed steel bar passes through the locking nut, the limiting thick steel plate, the jack, and the supporting top seat.

[0011] Preferably, the support base is provided with an anti-buoyancy anchor bolt thick steel plate, and the anti-buoyancy anchor bolt thick steel plate is provided with an anti-buoyancy anchor bolt nut.

[0012] Preferably, the anti-buoyancy anchor bar passes through the support base, the anti-buoyancy anchor nut, and the anti-buoyancy anchor thick steel plate.

[0013] Therefore, this utility model adopts the above-mentioned tensioning device for anti-buoyancy anchor prestressed steel bars. The prestressed steel bars are connected to the anti-buoyancy anchor steel bars through connectors, and the anti-buoyancy anchor steel bars are tensioned by setting jacks above the support. During tensioning, the anti-buoyancy anchor steel bars are locked by locking nuts and limiting thick steel plates, which realizes convenient tensioning of anti-buoyancy anchor steel bars, reduces material waste, and reduces the risk of prestress loss.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of a tensioning device for anti-buoyancy anchor rod prestressed steel bars according to this utility model.

[0016] Figure Labels 1. Jack; 2. Limiting steel plate; 3. Locking nut; 4. Prestressed steel bar; 5. Support column; 6. Support brace; 7. Connector; 8. Support base; 9. Anti-buoyancy anchor plate; 10. Anti-buoyancy anchor nut; 11. Anti-buoyancy anchor bar; 13. Support top seat. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example 1 This utility model provides a tensioning device for prestressed steel bars in anti-buoyancy anchor bolts, such as... Figure 1 As shown, the system includes a support frame, which comprises support columns 5, support braces 6, support bases 8, and support tops 13. When in use, the support frame is placed on the ground. The support base 8 is located at the bottom of the support frame and contacts the ground, while the support tops 13 are located at the top of the support frame. The support columns 5 are connected to the support tops 13 and the support base 8 at both ends, respectively. The support braces 6 are diagonally positioned between two adjacent support columns 5.

[0020] A jack 1 is installed above the support top seat 13. A limiting thick steel plate 2 is installed on the jack 1. A locking nut 3 is installed above the limiting thick steel plate 2. The jack 1 is used to resist the tension of the floating anchor rod 11. The locking nut 3 is used to lock with the prestressed steel bar 4 and transfer the force from the jack 1 below to the prestressed steel bar 4. The limiting thick steel plate 2 acts as a gasket.

[0021] The support frame contains prestressed steel bars 4, which pass through locking nuts 3, limiting thick steel plates 2, jacks 1, and support top seats 13. A connector 7 is connected below the prestressed steel bars 4, and an anti-buoyancy anchor bar 11 is connected below the connector 7.

[0022] A thick steel plate 9 for anti-buoyancy anchor rods is installed on the support base 8, and an anti-buoyancy anchor rod nut 10 is installed on the thick steel plate 9. The anti-buoyancy anchor rod reinforcement 11 passes through the support base 8, the anti-buoyancy anchor rod nut 10, and the thick steel plate 9. The thick steel plate 9 and the anti-buoyancy anchor rod nut 10 are used to maintain the prestress after the prestress is applied.

[0023] The tensioning device for anti-buoyancy anchor bolt prestressed steel bars described in this embodiment operates as follows: The anti-buoyancy anchor bar 11 is passed through the support base 8, the anti-buoyancy anchor thick steel plate 9 and the anti-buoyancy anchor nut 10 in sequence. The top end of the anti-buoyancy anchor bar 11 is connected to the bottom end of the prestressed steel bar 4 through the connector 7 to ensure a firm connection.

[0024] Place jack 1, turn the locking nut 3 to lock it with the prestressed steel bar 4, start jack 1 to apply upward tension, the tension is transmitted to the anti-buoyancy anchor bar 11 through the prestressed steel bar 4 and connector 7, causing the anti-buoyancy anchor bar 11 to stretch. During the process, monitor the stress value of the steel bar until the design tension parameters are reached.

[0025] Maintain the pressure of jack 1, tighten the anti-buoyancy anchor nut 10 to complete the prestress locking, then gradually release the tension of jack 1, and finally check the locking status. After confirming that there is no looseness, remove jack 1 to complete the tensioning operation.

[0026] Therefore, this utility model adopts the above-mentioned tensioning device for anti-buoyancy anchor prestressed steel bars. The prestressed steel bars are connected to the anti-buoyancy anchor steel bars through connectors, and the anti-buoyancy anchor steel bars are tensioned by setting jacks above the support. During tensioning, the anti-buoyancy anchor steel bars are locked by locking nuts and limiting thick steel plates, which realizes convenient tensioning of anti-buoyancy anchor steel bars, reduces material waste, and reduces the risk of prestress loss.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A tensioning device for prestressed steel bars in anti-buoyancy anchor bolts, characterized in that: The device includes a support frame containing prestressed steel bars, a jack on top of the support frame, a limiting steel plate on the jack, a locking nut on top of the limiting steel plate, a connector below the prestressed steel bars, and an anti-buoyancy anchor rod below the connector.

2. The tensioning device for anti-buoyancy anchor prestressed steel bars according to claim 1, characterized in that: The support includes a support column, a support brace, a support base, and a support top.

3. The tensioning device for anti-buoyancy anchor prestressed steel bars according to claim 2, characterized in that: The support base is located at the bottom of the bracket, the support top is located at the top of the bracket, the two ends of the bracket column are respectively connected to the support top and the support base, and the bracket diagonal brace is obliquely arranged between two adjacent bracket columns.

4. The tensioning device for prestressed steel bars of anti-buoyancy anchor bolts according to claim 3, characterized in that: The prestressed steel bar passes through the locking nut, the limiting thick steel plate, the jack, and the supporting top seat.

5. The tensioning device for prestressed steel bars of anti-buoyancy anchor bolts according to claim 4, characterized in that: The support base is provided with an anti-buoyancy anchor plate, and the anti-buoyancy anchor nut is provided on the anti-buoyancy anchor plate.

6. The tensioning device for prestressed steel bars of anti-buoyancy anchor bolts according to claim 5, characterized in that: The anti-buoyancy anchor bar passes through the support base, the anti-buoyancy anchor nut, and the anti-buoyancy anchor thick steel plate.

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