Prestressed anti-floating anchor rod with auxiliary guiding, centering and positioning functions

Abstract

The utility model provides a prestressed anti -floating anchor rod with the function of auxiliary guide centering and positioning, including anti -floating anchor rod subassembly and centering support, anti -floating anchor rod subassembly includes at least three anchor rod bodies that are connected as a whole through round chuck, is equipped with the round support between the anchor rod body near reinforcing end plate, is equipped with the guide support of conical on the round support, the main part of centering support is the support ring, is uniformly distributed with a plurality of anchor plates in the lateral of support ring, and is uniformly distributed with a plurality of elastic bars that are bent to the center of support ring along the vertical of the side of support ring, the tightening force of the elastic bar of centering support keeps anti -floating anchor rod subassembly in vertical state in the process of putting into the anchor hole, and the centering support is fixed on the upper end of anti -floating anchor rod subassembly after being in place below, keeps it in the middle position of anchor hole, effectively solves the problem that anchor rod is inclined in anchor hole after pouring cement mortar, guarantees the construction quality of prestressed anti -floating anchor rod.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a prestressed anti-buoyancy anchor rod with auxiliary guiding centering and positioning function. Background Technology

[0002] Prestressed anti-buoyancy anchors are made by drilling holes in the foundation, inserting anchors into the holes, and then applying prestress to the anchors to make them tightly bonded to the surrounding soil or rock, generating pull-out force to resist the buoyancy of the building and stably anchoring the building foundation to the foundation, preventing the building from floating, deforming or even being damaged due to buoyancy.

[0003] During the construction of prestressed anti-buoyancy anchors, holes of a certain diameter and depth are drilled in the foundation using a drilling rig. The pre-fabricated anchor body is placed into the hole, and cement grout or other bonding materials are poured into the hole to ensure a tight bond between the anchor and the surrounding strata, forming an anchoring section. To ensure the formation of the anchoring section, the diameter of the hole needs to be larger than the cross-sectional dimension of the anchor. This results in the anchor being eccentric within the hole. After the cement grout is poured, the anchor may deviate to the outer side of the anchoring section, weakening the anchoring effect, reducing pull-out resistance, and affecting the construction quality of the prestressed anti-buoyancy anchor. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a prestressed anti-buoyancy anchor rod with auxiliary guiding and centering positioning functions.

[0005] The technical solution of this utility model is as follows: a prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function, including an anti-buoyancy anchor bolt assembly and a centering bracket. The anti-buoyancy anchor bolt assembly includes at least three anchor bolt bodies connected as one unit by a circular chuck. The anchor bolt bodies are evenly distributed on the circular chuck, which has a slot. The anchor bolt bodies are engaged in the slot. A reinforcing end plate is provided between the lower ends of the anchor bolt bodies. The reinforcing end plate is welded and fixed between the end faces of the anchor bolt bodies. A circular support is provided between the anchor bolt bodies near the reinforcing end plate. A conical guide bracket is provided on the circular support. The guide bracket is welded by bent ribs, which helps to reduce costs. The main body of the centering bracket is a supporting ring. The size of the supporting ring matches the cross-sectional size between the anchor bolt bodies in the anti-buoyancy anchor bolt assembly. Several anchor plates are evenly distributed laterally on the side of the supporting ring. The end of the anchor plate has a through hole. An anchor top is inserted into the through hole. Several elastic rods bent towards the center of the supporting ring are evenly distributed vertically on the side of the supporting ring.

[0006] Preferably, the lower end of the elastic rod is provided with a straight rod section aligned with the center line of the supporting ring, and the straight rod section and the main body of the elastic rod are connected by an arc-shaped section.

[0007] Preferably, the inner side of the straight rod section is provided with an arc-shaped pressure plate, and there is a gap between adjacent arc-shaped pressure plates. The size of the arc-shaped pressure plate matches the size of the straight rod section.

[0008] Preferably, the upper part of the anti-buoyancy anchor bolt assembly is fixedly fitted with an upper helical bar, and the lower part is fixedly fitted with a lower helical bar. Both the upper and lower helical bars are welded and fixed to the anti-buoyancy anchor bolt assembly.

[0009] Preferably, the anti-buoyancy anchor bolt assembly is provided with a grouting pipe at its center. The grouting pipe is a plastic hose with its lower end extending into the guide bracket and its upper end extending out from the upper part of the anti-buoyancy anchor bolt assembly. The upper end of the grouting pipe extends out from the upper port of the anchor hole.

[0010] Preferably, the upper end of the anti-buoyancy anchor assembly is provided with a tensioning support, and a tensioning cylinder is provided at the upper end of the tensioning support. The anchor body moves upward from the tensioning support into the tensioning cylinder and is connected to the piston drive rod inside the tensioning cylinder.

[0011] Preferably, the tensioning support includes a lower annular support and an upper annular support. The upper annular support and the lower annular support are the same size. The lower annular support and the upper annular support are fixedly connected as a whole by vertical struts. At least three vertical struts are provided to ensure the overall stability of the support structure.

[0012] The beneficial technical effects of this utility model are as follows: This utility model sets a centering bracket on the upper part of the anti-buoyancy anchor bolt assembly. The centering bracket is fitted onto the upper end of the anchor hole. During the process of inserting the anti-buoyancy anchor bolt assembly into the anchor hole, the tightening force of the evenly distributed elastic rods on the centering bracket keeps the anti-buoyancy anchor bolt assembly in a vertical state. After the lower part is in place, the centering bracket is tightened and fixed at the upper end of the anti-buoyancy anchor bolt assembly, keeping it in the exact center of the anchor hole. This effectively solves the problem of the anchor bolt deflecting in the anchor hole after the cement grout is poured, and ensures the construction quality of the prestressed anti-buoyancy anchor bolt. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 yes Figure 1 A top-view structural diagram;

[0015] Figure 3 yes Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0016] Figure 4 This is a three-dimensional structural diagram of the centering bracket;

[0017] Figure 5 yes Figure 4 A top-view structural diagram;

[0018] Figure 6 This is a three-dimensional structural diagram of the centering bracket inside the anchor hole;

[0019] Figure 7 This is a three-dimensional structural diagram of the present invention after the tensioning cylinder is installed;

[0020] Figure 8 This is a three-dimensional structural diagram of the anti-buoyancy anchor bolt assembly.

[0021] In the diagram, 01. Anti-buoyancy anchor bolt assembly, 11. Anchor bolt body, 12. Circular chuck, 13. Reinforcing end plate, 14. Circular support, 15. Guide bracket, 16. Upper spiral reinforcement, 17. Lower spiral reinforcement, 18. Grouting pipe, 02. Centering bracket, 21. Support ring, 22. Anchor plate, 23. Elastic rod, 24. Straight rod section, 25. Arc-shaped pressure plate, 31. Tensioning cylinder, 32. Tensioning support, 321. Lower annular support, 322. Upper annular support, 323. Vertical strut, 41. Foundation, 42. Concrete layer, 43. Anchor hole. Detailed Implementation

[0022] Example 1, see appendix to the instruction manual. Figure 1-8 A prestressed anti-buoyancy anchor bolt with auxiliary guiding and centering positioning function includes an anti-buoyancy anchor bolt assembly 01 and a centering bracket 02. The anti-buoyancy anchor bolt assembly 01 includes at least three anchor bolt bodies 11 connected as one unit by a circular chuck 12. A reinforcing end plate 13 is provided between the lower ends of the anchor bolt bodies 11. The anchor bolt bodies 11 are fixedly connected as a whole by the circular chuck 12 and the reinforcing end plate 13 to form an integrated anti-buoyancy anchor bolt assembly 01. A circular support 14 is provided between the anchor bolt bodies 11 near the reinforcing end plate 13. A conical guide bracket 15 is provided on the circular support 14. The size of the guide bracket 15 matches the size of the anchor hole 43. During the process of inserting the anchor bolt assembly into the anchor hole 43, the guide bracket 15 guides the anchor bolt body 11 to the anchor hole 43. The bracket 15 serves to guide the anchor bolt assembly, allowing it to be smoothly lowered and moved within the anchor hole 43. The main body of the centering bracket 02 is a support ring 21, the size of which matches the cross-sectional dimensions of the anchor bolt body 11 in the anti-buoyancy anchor bolt assembly 01, ensuring that the anti-buoyancy anchor bolt assembly 01 can be smoothly inserted into the anchor hole 43 from the support ring 21. Several anchor plates 22 are evenly distributed laterally on the side of the support ring 21, anchoring the support ring 21 to the concrete layer 42 on the ground surface through the anchor plates 22. Several elastic rods 23 are evenly distributed vertically on the side of the support ring 21, bending towards the center of the support ring 21. These elastic rods 23 generate elastic tightening force in the circumferential direction.

[0023] The upper part of the anti-buoyancy anchor bolt assembly 01 is fixed with an upper spiral bar 16, and the lower part is fixed with a lower spiral bar 17. The spiral bars are used to increase the contact area between the anti-buoyancy anchor bolt assembly 01 and the cement grout, thereby improving the bonding strength between it and the cement after hardening.

[0024] The anti-buoyancy anchor assembly 01 is provided with a grouting pipe 18 at its center. The lower end of the grouting pipe 18 extends into the guide bracket 15, and the upper end extends out from the upper part of the anti-buoyancy anchor assembly 01. Grouting is performed on the ground from the upper port of the grouting pipe 18. Cement grout enters the bottom of the anchor hole 43 through the grouting pipe 18, and the cement grout level slowly rises to the port of the anchor hole 43.

[0025] The upper end of the anti-buoyancy anchor bolt assembly 01 is provided with a tensioning support 32, and a tensioning cylinder 31 is provided at the upper end of the tensioning support 32. The anchor bolt body 11 enters the tensioning cylinder 31 from the tensioning support 32 upwards. The tensioning support 32 provides support for the tensioning cylinder 31, and the tensioning cylinder 31 pulls the anti-buoyancy anchor bolt assembly 01 upwards, causing it to generate prestress. The tensioning support 32 includes a lower annular support 321 and an upper annular support 322. The lower annular support 321 and the upper annular support 322 are fixedly connected as a whole by a vertical support rod 323, forming a simple and stable support structure that is easy to process and has a low cost.

[0026] The method and principle of using the prestressed anti-buoyancy anchor are as follows: The drilling rig drills anchor holes 43 in the concrete layer 42 on the ground surface and in the foundation 41 below the ground surface. Then, a centering bracket 02 is placed at the upper end of the anchor hole 43. The centering bracket 02 is fixed to the surface of the concrete layer 42 by the anchor plate 22. The anti-buoyancy anchor assembly 01 is vertically inserted into the anchor hole 43 from the centering bracket 02. During the process of lowering the anti-buoyancy anchor assembly 01 into the anchor hole 43, the tightening force of the elastic rods 23 evenly distributed on the centering bracket 02 keeps the anti-buoyancy anchor assembly 01 in a vertical state. After the lower part is in place, the centering bracket 02 is tightened and fixed at the upper end of the anti-buoyancy anchor assembly 01, keeping it in the middle position of the anchor hole 43. This effectively solves the problem of the anchor being deflected in the anchor hole 43 after the cement grout is poured, and ensures the construction quality of the prestressed anti-buoyancy anchor.

[0027] Example 2, see appendix to the instruction manual. Figure 3-5 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: the lower end of the elastic rod 23 is provided with a straight rod section 24 that is aligned with the center line of the supporting ring 21. The inner side of the straight rod section 24 is provided with an arc-shaped pressure plate 25. There is a gap between adjacent arc-shaped pressure plates 25. The arc-shaped pressure plates 25 are installed by setting the straight rod section 24. These arc-shaped pressure plates 25 form a sleeve structure. Relying on the elastic force provided by the elastic rod 23, each arc-shaped pressure plate 25 is tightly held on the outer side of the anti-buoyancy anchor rod assembly 01, thereby improving the stability of the centering and fixing.

Claims

1. A prestressed anti-buoyancy anchor bolt with auxiliary guiding and centering positioning function, characterized in that: The device includes an anti-buoyancy anchor bolt assembly and a centering bracket. The anti-buoyancy anchor bolt assembly includes at least three anchor bolt bodies connected as one unit by a circular chuck. A reinforcing end plate is provided between the lower ends of the anchor bolt bodies. A circular support is provided between the anchor bolt bodies near the reinforcing end plate. A conical guide bracket is provided on the circular support. The main body of the centering bracket is a supporting ring. The size of the supporting ring matches the cross-sectional size between the anchor bolt bodies in the anti-buoyancy anchor bolt assembly. Several anchor plates are evenly distributed laterally on the side of the supporting ring, and several elastic rods bent towards the center of the supporting ring are evenly distributed vertically on the side of the supporting ring.

2. A prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function according to claim 1, characterized in that: The lower end of the elastic rod is provided with a straight rod section aligned with the center line of the supporting ring.

3. A prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function according to claim 2, characterized in that: The inner side of the straight rod section is provided with an arc-shaped pressure plate, and there is a gap between adjacent arc-shaped pressure plates.

4. A prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function according to claim 1, characterized in that: The upper part of the anti-buoyancy anchor bolt assembly is fixedly fitted with an upper helical reinforcement, and the lower part is fixedly fitted with a lower helical reinforcement.

5. A prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function according to claim 1, characterized in that: The anti-buoyancy anchor bolt assembly has a grouting pipe at its center. The lower end of the grouting pipe extends into the guide bracket, and the upper end extends out from the top of the anti-buoyancy anchor bolt assembly.

6. A prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function according to claim 1, characterized in that: The upper end of the anti-buoyancy anchor assembly is provided with a tensioning support, and a tensioning cylinder is provided at the upper end of the tensioning support. The anchor body moves upward from the tensioning support into the tensioning cylinder.

7. A prestressed anti-buoyancy anchor bolt with auxiliary guiding centering and positioning function according to claim 6, characterized in that: The tensioning support includes a lower annular support and an upper annular support, which are fixedly connected as a whole by a vertical strut.

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