A novel anchor structure

Abstract

This utility model discloses a novel anchor structure, including an anchor body and multiple anchoring bars. The anchor body is pre-embedded in the bottom of the grouting base plate. The anchor body has multiple vertically penetrating anchor holes evenly distributed throughout, each equipped with an anchoring component for locking the steel strand. The multiple anchoring bars are connected to the top of the anchor body and are pre-embedded and fixed within the grouting base plate. In use, the steel strand passes through the anchor holes. After tensioning, the steel strand is locked by the anchoring components. This utility model places the anchor body at the bottom of the grouting base plate and pre-embeds and fixes it to the base plate using multiple anchoring bars. This allows the grouting base plate to bear the load on the anchor structure, serving as a load-bearing support for the upper part of the steel strand, thereby improving the stability of the prestressed steel strand. The anchor rod is only subjected to buoyancy, with no random stress generated. It utilizes the high tensile strength of the steel strand and combines the good anchoring ability of the anchoring bars and the grouting base plate.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering and anti-buoyancy technology of underground structures, and in particular to a novel anchor structure. Background Technology

[0002] Anti-buoyancy anchors are an important means of solving the problem of uplift in underground engineering projects, and their construction quality directly affects the anti-buoyancy stability of underground projects. Traditional prestressed anti-buoyancy anchors are usually made by tensioning steel strands and then anchoring them through an anchor structure. Currently, existing anchor structures are generally set at the top of the prestressing transfer support located in the middle of the cast-in-place base slab, or at the top of the cast-in-place base slab. This is because the cast-in-place base slab bears the additional compressive stress generated by the anchor tension for a long time, and with changes in groundwater level, the reinforcement is prone to random fatigue, resulting in serious loss of prestress in the steel strands. Utility Model Content

[0003] The purpose of this utility model is to provide a novel anchor structure to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0005] This utility model provides a novel anchor structure, comprising:

[0006] The anchor body is embedded in the bottom of the grouting base plate. The anchor body has multiple anchoring holes that are evenly distributed and run vertically through each other. The anchoring holes are equipped with anchoring components for locking the steel strand.

[0007] The anchoring steel bars are provided in multiple pieces, which are connected to the top of the anchor body. The anchoring steel bars are used to be pre-embedded and fixed in the grouting base plate.

[0008] The beneficial effects of this novel anchor structure are:

[0009] In use, the steel strand passes through the anchoring hole. After the steel strand is tensioned, it is locked by the anchoring assembly. This invention places the anchor body at the bottom of the grouting base plate and pre-embeds and fixes it to the grouting base plate through multiple anchoring steel bars. This allows the grouting base plate to bear the load on the anchor structure, serving as the force support for the upper part of the steel strand and improving the stability of the prestressed steel strand tension. The anchor rod is only subjected to the buoyancy of the water and no random stress is generated. It can utilize the high tensile strength of the steel strand and combine the good anchoring ability of the anchoring steel bars and the grouting base plate.

[0010] As a further improvement to the above technical solution, the anchoring steel bar is detachably connected to the anchor body.

[0011] As a further improvement to the above technical solution, the top of the anchor body is also provided with multiple connecting screw holes, and the lower end of the anchoring steel bar is provided with a screw head, which is threadedly connected to the connecting screw holes.

[0012] As a further improvement to the above technical solution, the connecting screw hole extends vertically through the anchor body, and the bottom end of the screw head can protrude from the bottom of the anchor body.

[0013] As a further improvement to the above technical solution, the plurality of anchoring holes and the plurality of connecting screw holes are distributed in a ring-shaped interval around the center of the anchor body, and the connecting screw holes are located between two adjacent anchoring holes.

[0014] As a further improvement to the above technical solution, the anchoring hole is a tapered hole that is larger at the top and smaller at the bottom. The anchoring assembly includes at least two clamping pieces, which are arranged in annular intervals to form a tapered cylindrical structure that is larger at the top and smaller at the bottom. The tapered cylindrical structure is slidably fitted into the anchoring hole along the axial direction.

[0015] As a further improvement to the above technical solution, the anchoring assembly further includes an elastic collar, which is sleeved on the outer periphery of the conical cylinder structure.

[0016] As a further improvement to the above technical solution, each of the clips has an arc-shaped limiting groove on its outer peripheral surface, and the elastic collar is sleeved in the limiting groove.

[0017] As a further improvement to the above technical solution, the inner circumferential surface of the clamp is provided with a friction structure that makes frictional contact with the steel strand.

[0018] As a further improvement to the above technical solution, the friction structure includes multiple rows of barbs arranged at an upward angle.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is a front sectional view of an embodiment of the novel anchor structure provided by this utility model;

[0022] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0023] Figure 3 This is a top view of an embodiment of the anchor body provided by this utility model;

[0024] Figure 4 This is a cross-sectional view of an embodiment of the novel anchor structure provided by this utility model in use.

[0025] Icon labels:

[0026] Anchor body 100; anchor hole 110; anchor assembly 120; wedge 121; limiting groove 1211; barb 1212; elastic collar 122; connecting screw hole 130;

[0027] Anchoring steel bar 200; threaded rod head 210;

[0028] 300 steel strand. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0034] Currently, existing anchorage structures are generally set on top of the prestressing transfer support located in the middle of the cast-in-place base slab, or on top of the cast-in-place base slab. Because the cast-in-place base slab is subjected to additional compressive stress generated by the anchor tension for a long time, and the reinforcement is prone to random fatigue with changes in groundwater level, resulting in serious loss of prestress in the steel strand 300. Therefore, this utility model proposes a new type of anchorage structure that can utilize the high tensile strength of the steel strand 300 and combine it with the good anchoring ability of the anchoring steel bar 200 and the cast-in-place base slab to improve the stability of the tension prestress of the steel strand 300.

[0035] like Figure 1 As shown, the novel anchor structure of this utility model includes: an anchor body 100 and multiple anchoring steel bars 200.

[0036] The anchor body 100 is a disc-shaped steel component. The anchor body 100 has multiple anchor holes 110 that are vertically connected. The anchor holes 110 are equipped with anchoring components 120 for locking the steel strand 300. In use, the anchor body 100 is pre-embedded in the bottom of the grouting base plate and located on top of the grouting body in the anchor hole, so that the load-bearing capacity of the grouting body is lowered to the bottom of the grouting base plate.

[0037] Multiple anchoring steel bars 200 are connected to the top of the anchor body 100, and the anchoring steel bars 200 are used to be pre-embedded and fixed in the grouting base plate.

[0038] like Figure 4 As shown, during use, the steel strand 300 passes through the anchoring hole 110. After the steel strand 300 is tensioned, it is locked by the anchoring component 120. Then, concrete is poured to form a grouting base plate, which covers multiple anchoring bars 200 and anchorages. The anchorage body 100 is located at the bottom of the grouting base plate, and the multiple anchoring bars 200 are pre-embedded and fixed in the grouting base plate, so that the grouting base plate bears the load on the anchorage structure, serving as the force support for the upper part of the steel strand 300. This improves the stability of the prestressing of the steel strand 300. The anchor rod is only subjected to buoyancy, and no random stress is generated. It can utilize the high tensile strength of the steel strand 300, combined with the good anchoring ability of the anchoring bars 200 and the grouting base plate.

[0039] To facilitate the tensioning and anchoring of the steel strand 300, the anchoring steel bar 200 is detachably connected to the anchor body 100. Before tensioning and anchoring the steel strand 300, the anchoring steel bar 200 is removed in advance. After the steel strand 300 is tensioned and anchored, the anchoring steel bar 200 is installed again and concrete is poured, which facilitates construction.

[0040] Regarding the connection method between the anchoring steel bar 200 and the anchor body 100, in some other embodiments, a snap-fit ​​or interference fit method can be used. In order to make the connection between the anchoring steel bar 200 and the anchor body 100 more secure and to adjust the height of the upper end of the anchoring steel bar 200, this embodiment adopts a threaded connection method. Specifically, the top of the anchor body 100 in this embodiment is also evenly distributed with multiple connecting screw holes 130, and the lower end of the anchoring steel bar 200 is provided with a screw head 210, which is threadedly connected to the connecting screw holes 130.

[0041] Furthermore, considering that after tensioning the steel strand 300 and anchoring it via the anchoring assembly 120, the steel strand 300 still needs to be cut, and during the cutting process, stress relaxation of the steel strand 300 can easily occur, leading to prestress loss. In this embodiment, the connecting screw hole 130 extends vertically through the anchor body 100, and the bottom end of the screw head 210 can pass through the bottom of the anchor body 100. Then, by rotating the anchoring steel bar 200, the bottom end of the screw head 210 can abut against the grouting body or anchor plate below the anchor body 100. Figure 4 As shown, when the anchoring steel bar 200 is rotated further, the anchor body 100 can be pulled upward to further tension the steel strand 300, compensate for the prestress loss caused by the stress relaxation of the steel strand 300, and has a self-locking function.

[0042] Furthermore, such as Figure 3 As shown, in this embodiment, the multiple anchoring holes 110 and multiple connecting screw holes 130 are distributed in a ring around the center of the anchor body 100, and the connecting screw holes 130 are located between two adjacent anchoring holes 110, so that the force on the anchor body 100 is more uniform, and the tension of the steel strand 300 on the anchor body 100 and the force of the anchoring steel bar 200 on the anchor body 100 are staggered and distributed in a ring.

[0043] In this embodiment, the anchoring component 120 can unidirectionally lock the steel strand 300. As shown in Figure 2, the anchoring hole 110 in this embodiment is a tapered hole that is larger at the top and smaller at the bottom. The anchoring component 120 includes at least two clamping pieces 121, which are arranged in a ring to form a tapered cylindrical structure that is larger at the top and smaller at the bottom. The clamping pieces 121 on the tapered cylindrical structure can move radially, and the tapered cylindrical structure is axially slidably fitted into the anchoring hole 110. In use, the steel strand... The steel strand 300 passes through the conical cylinder structure and is tensioned upwards. At this time, the steel strand 300 can move upwards relative to the anchor hole 110. After tensioning, the steel strand 300 is released. Under the action of prestress, the steel strand 300 pulls the conical cylinder structure downwards. Guided by the conical surface of the anchor hole 110, the clamp 121 hugs the steel strand 300 to lock the steel strand 300, thereby locking the prestress of the steel strand 300.

[0044] In this embodiment, the loss of prestress during the anchoring and locking of the steel strand 300 can also be compensated by rotating the anchoring steel bar 200. Although the steel strand 300 pulls the conical cylinder structure down a very small distance, there will still be a loss of prestress.

[0045] To prevent clip 121 from falling off individually, such as Figure 2 As shown, the anchoring assembly 120 also includes an elastic collar 122, which is sleeved on the outer periphery of the conical cylinder structure to limit the position of the clamping piece 121.

[0046] Furthermore, in this embodiment, each clip 121 has an arc-shaped limiting groove 1211 on its outer peripheral surface, and the elastic collar 122 is sleeved in the limiting groove 1211 to limit the installation of the elastic collar 122.

[0047] The inner circumferential surface of the clamp 121 in this embodiment is provided with a friction structure that rubs against the steel strand 300 to increase the friction between the clamp 121 and the steel strand 300, thereby improving the stability of the anchoring of the steel strand 300.

[0048] The friction structure includes multiple rows of barbs 1212 arranged at an upward angle. The multiple rows of barbs 1212 are spaced up and down along the axial direction, so as not to hinder the upward movement of the steel strand 300, but to lock the downward movement of the steel strand 300.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A new anchorage structure characterized in that, Comprise: Anchorage body, embedded in the bottom of the pouring floor, uniformly distributed with a plurality of anchoring holes through the top and bottom, provided with anchoring components for locking the steel strand; A plurality of anchoring steel bars are connected to the top of the anchorage body, which are used for embedding and fixing in the pouring floor.

2. The new anchorage structure according to claim 1, wherein: The anchoring steel bars and the anchorage body are detachably connected.

3. The new anchorage structure according to claim 2, wherein: The top of the anchorage body is also uniformly distributed with a plurality of connecting screw holes, and the lower end of the anchoring steel bar is provided with a screw head which is threadedly connected with the connecting screw hole.

4. The new anchorage structure according to claim 3, wherein: The connecting screw hole penetrates through the anchorage body from top to bottom, and the bottom end of the screw head can pass out from the bottom of the anchorage body.

5. The new anchorage structure according to claim 4, wherein: A plurality of anchoring holes and a plurality of connecting screw holes are respectively arranged in a ring shape around the center of the anchorage body, and the connecting screw hole is arranged between two adjacent anchoring holes.

6. The new anchorage structure according to claim 1, wherein: The anchoring hole is a tapered hole with a large upper part and a small lower part, and the anchoring component includes at least two clamping pieces, and the at least two clamping pieces are arranged in a ring shape to form a tapered cylinder structure with a large upper part and a small lower part, and the tapered cylinder structure is slidably sleeved in the anchoring hole.

7. The new anchorage structure according to claim 6, wherein: The anchoring component further comprises an elastic sleeve ring, and the elastic sleeve ring is sleeved on the outer periphery of the tapered cylinder structure.

8. The new anchorage structure according to claim 7, wherein: The outer peripheral surface of each clamping piece is provided with an arc-shaped limiting groove, and the elastic sleeve ring is sleeved in the limiting groove.

9. The new anchorage structure according to claim 6, wherein: The inner peripheral surface of the clamping piece is provided with a friction structure for friction contact with the steel strand.

10. The new anchorage structure according to claim 9, wherein: The friction structure includes a plurality of rows of barbs arranged upwardly inclined.

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