Base for prestress tensioning based on anchor rod

Abstract

The utility model relates to the technical field of anchor rod construction and discloses a base based on anchor rod prestress tensioning. The top end of the prestress device is in sliding connection with the inner wall of the cushion layer; the anchoring structure is arranged at the bottom end of the cushion layer; the bottom end of the anchorage device is connected with the inner wall of the prestress device in a sliding mode, the prestress device comprises a steel cylinder, and the top end of the steel cylinder is fixedly connected with an upper steel gasket. The anchor rod is evenly stressed in the tensioning process, the bearing capacity and stability of the anchor rod are improved, the prestress device is easy and fast to install, the construction time is saved, the steel bars transversely penetrate through the steel cylinder through the fixing holes, the prestress device is poured in the bottom plate, the punching resistance of bottom plate concrete is enhanced, and the service life of the bottom plate concrete is prolonged. And the integrity and durability of the whole structure are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of anchor rod construction technology, specifically relates to a base based on anchor rod prestress tension. BACKGROUND

[0002] In the field of construction engineering, especially in the project involving anchor rod prestress tension, there are increasingly high requirements for the stability, reliability and construction convenience of the base.

[0003] With the continuous development of engineering technology, the traditional anchor rod prestress tension base gradually exposes some problems in practical application. For example, insufficient anchoring force may cause loosening or displacement during prestress tension, affecting the safety and reliability of the project; unstable prestress application will cause uneven stress on the anchor rod, reducing the bearing capacity and stability of the anchor rod; complex construction process will consume a lot of time and labor cost, affecting the project progress. There are also strict requirements for the stability and durability of the structure. A new type of base based on anchor rod prestress tension is needed to provide stable anchoring force, ensure accurate prestress application and convenient and fast construction to meet the specific engineering requirements.

[0004] In summary, in order to solve the problems existing in the prior art and improve the quality and efficiency of the project, it is of great practical significance to develop a new type of base based on anchor rod prestress tension. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the technical scheme adopted by the utility model to solve its technical problems is: a base based on anchor rod prestress tension, comprising: a cushion layer; a prestress device, the top end of the prestress device is slidably connected with the inner wall of the cushion layer; an anchoring structure, the anchoring structure is arranged at the bottom end of the cushion layer; an anchor, the bottom end of the anchor is slidably connected with the inner wall of the prestress device; the prestress device comprises a steel cylinder, the top end of the steel cylinder is fixedly connected with an upper steel gasket, the outer wall of the steel cylinder is fixedly connected with a lower steel gasket, and a fixing hole is formed in the wall of the steel cylinder.

[0006] Preferably, the bottom end outer wall of the steel cylinder is slidably connected with the inner wall of the cushion layer, the outer wall of the anchor is slidably connected with the inner wall of the upper steel gasket, and the outer wall of the lower steel gasket is slidably connected with the outer wall of the cushion layer. The prestress device is the base used during tensioning, the upper steel gasket in the prestress device closely cooperates with the anchor to ensure stable application of prestress, the lower steel cylinder is inserted into the anchor rod hole, and the bottom surface of the lower steel gasket is located on the top surface of the cushion layer, so that the prestress device is perpendicular to the cushion layer.

[0007] Preferably, the fixing holes are linearly arrayed along the central axis of the steel cylinder, and the steel cylinder is perpendicular to the cushion layer by 90 degrees. The design that the steel cylinder is perpendicular to the cushion layer by 90 degrees guarantees the direction accuracy of prestress transmission, avoids the problem of stress unevenness caused by angle deviation, and enhances the bottom plate concrete anti-punching by crossing the steel cylinder with the reinforcing steel bar through the fixing holes.

[0008] Preferably, the anchoring structure comprises a steel strand, the inside of the steel strand is provided with a central grouting pipe, the outer wall of the steel strand is fixedly installed with an isolation support, and the bottom end of the steel strand is fixedly connected with a bearing plate. The isolation support separates the steel strands to avoid mutual interference, and the bearing plate serves as an important bearing component.

[0009] Preferably, the top end of the bearing plate is fixedly connected with a spiral rib, the bottom end of the bearing plate is fixedly connected with an extrusion sleeve, the outer wall of the bearing plate is fixedly connected with a guide support, and the bottom end of the guide support is fixedly connected with a guide constraint ring. The central grouting pipe penetrates through the bearing plate at the end away from the cushion layer and extends to the bottom end of the extrusion sleeve. The spiral rib at the top end enhances the bearing capacity of the bearing plate, and the extrusion sleeve at the bottom end of the bearing plate further fixes the steel strand; and the guide support and the guide constraint ring ensure the direction stability of the steel strand in the tensioning process.

[0010] The utility model discloses the beneficial effects are as follows:

[0011] 1. The utility model discloses a anchoring structure is set up, and the component such as steel strand, bearing plate, spiral rib and extrusion sleeve jointly acts for the base provides stable anchoring force, ensures that the loosening or displacement does not occur in the anchoring rod prestress tensioning process, improves the security and reliability of project, carries out cushion pouring construction again, and installs anchoring mechanism, and the construction process is clear, and convenient operation exposes the steel strand before the initial setting of cement paste and facilitates tensioning, improves construction efficiency.

[0012] 2. The utility model discloses a prestress device is set up, and the upper steel gasket is closely matched with anchor tool, can ensure the stable application of prestress, makes the anchoring rod even stress in the tensioning process, improves the bearing capacity and stability of anchoring rod, and the installation of prestress device is simple and quick, saves the construction time, and the reinforcing steel bar is crossed through the steel cylinder through the fixing hole, and the prestress device is poured in the bottom plate, and the anti-punching capacity of bottom plate concrete is enhanced, and the integrity and durability of whole structure are improved. DRAWINGS

[0013] Figure 1 It is the front view of the utility model;

[0014] Figure 2 It is the structure schematic view of the prestress device of the utility model;

[0015] Figure 3It is the structural schematic diagram of the anchoring structure of the utility model;

[0016] Figure 4 It is the structure enlarged view of A of the utility model Figure 3 .

[0017] In the drawing: 1, cushion layer;2, anchoring structure;21, steel strand;22, center grouting pipe;23, isolation support;24, bearing plate;25, spiral rib;26, guide support;27, guide constraint ring;28, extrusion sleeve;3, prestressed device;31, upper steel gasket;32, steel cylinder;33, lower steel gasket;34, fixed hole;4, anchorage. Specific implementation

[0018] The utility model makes further detailed explanation in combination with the drawings and specific implementation. The embodiment of the utility model is given for example and description, and is not exhaustive or limit the utility model to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The embodiment is selected and described to better illustrate the principle and practical application of the utility model, and enable those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes. Embodiment

[0019] Please refer to Figure 1 - Figure 4 The utility model provides a kind of technical scheme: a base based on anchor rod prestressed tension, comprising: cushion layer 1;Prestressed device 3, the top of prestressed device 3 and the inner wall of cushion layer 1 slidingly connected;Anchoring structure 2, anchoring structure 2 is set in the bottom of cushion layer 1;Anchorage 4, the bottom of anchorage 4 and the inner wall of prestressed device 3 slidingly connected;Prestressed device 3 includes steel cylinder 32, the top of steel cylinder 32 is fixedly connected with upper steel gasket 31, the outer wall of steel cylinder 32 is fixedly connected with lower steel gasket 33, and fixed hole 34 is set in the wall of steel cylinder 32.

[0020] The bottom outer wall of steel cylinder 32 and the inner wall of cushion layer 1 slidingly connected, the outer wall of anchorage 4 and the inner wall of upper steel gasket 31 slidingly connected, the outer wall of lower steel gasket 33 and the outer wall of cushion layer 1 slidingly connected.

[0021] Fixed hole 34 is linear array along the central axis of steel cylinder 32, and steel cylinder 32 is perpendicular to 90 ° with cushion layer 1.

[0022] Anchoring structure 2 includes steel strand 21, the inside of steel strand 21 is provided with center grouting pipe 22, the outer wall of steel strand 21 is fixedly installed with isolation support 23, and the bottom of steel strand 21 is fixedly connected with bearing plate 24.

[0023] The top end of the bearing plate 24 is fixedly connected with a spiral rib 25, the bottom end of the bearing plate 24 is fixedly connected with an extrusion sleeve 28, the outer wall of the bearing plate 24 is fixedly connected with a guide bracket 26, and the bottom end of the guide bracket 26 is fixedly connected with a guide constraint ring 27. The center grouting pipe 22 penetrates through the bearing plate 24 away from the cushion layer 1 and extends to the bottom end of the extrusion sleeve 28.

[0024] Working principle:

[0025] In use, during the prestress tensioning of the anchor rod, the base is first fixed at a predetermined position through the anchoring structure 2. The steel strand 21, the bearing plate 24 and other components jointly provide stable anchoring force. Then, the prestress device 3 is used to transmit prestress, and the anchor device 4 cooperates with the upper steel washer 31 to ensure the stable application of prestress. The entire base structure cooperates with each other to realize the prestress tensioning of the anchor rod, and improve the load-carrying capacity and stability of the anchor rod.

[0026] First, the cushion layer 1 is poured on the ground surface, and after the construction is completed, the cushion layer 1 and the below of the cushion layer 1 are drilled to complete the anchor rod hole, and the anchoring structure 2 is installed into the anchor rod hole, and then the center grouting pipe 22 inside the steel strand 21 is used to inject grout to enhance the anchoring effect. The isolation bracket 23 separates the steel strands 21 to avoid mutual interference between the steel strands, the bearing plate 24 serves as an important load-bearing component, the spiral rib 25 at the top end enhances the load-carrying capacity, and the extrusion sleeve 28 at the bottom end of the bearing plate 24 further fixes the steel strand 21; the guide bracket 26 and the guide constraint ring 27 ensure the direction stability of the steel strand 21 during tensioning.

[0027] After the anchor rod construction is completed before the initial setting of the cement grout, the steel strand 21 is exposed above the cushion layer 1 by 1.5 meters for tensioning, the prestress device 3 is placed above the cushion layer 1, the steel strand 21 passes through the prestress device 3, the lower steel cylinder 32 is inserted into the anchor rod hole, the bottom surface of the lower steel washer 33 is located on the top surface of the cushion layer, so that the prestress device 3 is perpendicular to the cushion layer 1 by 90 degrees, the steel strand 21 passes out of the hole of the upper steel washer 31, leaving enough tensioning length, after the setting period meets the tensioning condition, the anchor device 4 is installed above the upper steel washer 31 to perform tensioning locking, after the tensioning locking is completed, the excess steel strand 21 on the upper part of the anchor device 4 is cut off, then the bottom plate construction is performed, and the steel bars cross the steel cylinder 32 through the fixing holes 34 to enhance the anti-chopping of the bottom plate concrete, and the prestress device 3 is poured into the bottom plate through the concrete.

[0028] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor shall belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially described and limited, are implemented according to the conventional means in the art.

Claims

1. A base for use in prestress tensioning of an anchor rod, characterized in that Include: The cushion layer (1); Prestressed device (3), the top end of the prestressed device (3) is in sliding connection with the inner wall of the cushion layer (1); The anchoring structure (2) is arranged at the bottom end of the cushion layer (1); The anchor (4), the bottom end of the anchor (4) is in sliding connection with the inner wall of the prestressed device (3); The prestressed device (3) comprises a steel cylinder (32), the top end of the steel cylinder (32) is fixedly connected with an upper steel gasket (31), the outer wall of the steel cylinder (32) is fixedly connected with a lower steel gasket (33), and the wall of the steel cylinder (32) is provided with a fixing hole (34).

2. The base for use in prestress tension of an anchor rod according to claim 1, characterized in that: The bottom end of the outer wall of the steel cylinder (32) is in sliding connection with the inner wall of the cushion layer (1), the outer wall of the anchor (4) is in sliding connection with the inner wall of the upper steel gasket (31), and the outer wall of the lower steel gasket (33) is in sliding connection with the outer wall of the cushion layer (1).

3. The base for use in prestress tension of an anchor rod according to claim 2, characterized in that: The fixing hole (34) is linearly arrayed along the central axis of the steel cylinder (32), and the steel cylinder (32) is perpendicular to the cushion layer (1) by 90°.

4. The base for use in prestress tension of an anchor rod according to claim 1, characterized in that: The anchoring structure (2) comprises a steel strand (21), the inside of the steel strand (21) is provided with a center grouting pipe (22), the outer wall of the steel strand (21) is fixedly installed with an isolation support (23), and the bottom end of the steel strand (21) is fixedly connected with a bearing plate (24).

5. The base for use in prestress tension of an anchor rod according to claim 4, characterized in that: The top end of the bearing plate (24) is fixedly connected with a spiral rib (25), the bottom end of the bearing plate (24) is fixedly connected with an extrusion sleeve (28), the outer wall of the bearing plate (24) is fixedly connected with a guide support (26), and the bottom end of the guide support (26) is fixedly connected with a guide constraint ring (27).

6. A base for use in pre-stress tensioning of an anchor rod according to claim 5, characterized in that: The center grouting pipe (22) penetrates through the bearing plate (24) away from the cushion layer (1), and extends to the bottom end of the extrusion sleeve (28).

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