Anchoring rod for electric power construction

Abstract

The utility model discloses an anchor rod for electric power construction belongs to electric power construction anchor rod technical field, includes: the hollow pipe and hollow seat and top cover of integrated molding, the inside of hollow seat is divided into upper chamber and lower chamber, the top of hollow pipe is equipped with a root along the vertical wear of hollow pipe's central axis, in proper order penetrates top cover, hollow pipe and extends to the grouting pipe of hollow seat bottom, the outer wall of grouting pipe is equipped with the first group grouting hole of corresponding upper chamber and the second group grouting hole of corresponding lower chamber position, the outer wall of hollow seat is equipped with a plurality of grout outlet, and the grout outlet is directly communicated with lower chamber, and the outlet of each grout outlet covers a layer of high molecular polymer film, the four mobile columns of symmetry are provided on the hollow seat, and the mobile column penetrates hollow seat wall body, and the inner end extends to the upper chamber in. The utility model provides a kind of anchor rod that can effectively expand anchoring range again convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt technology for power construction, and in particular to an anchor bolt for power construction. Background Technology

[0002] As an important component in geotechnical engineering, anchor bolts are widely used in various infrastructure constructions. For example, in power transmission line projects, anchor bolts are usually used to fix the foundations of transmission towers or utility poles. By transferring structural loads to stable soil and rock layers, they resist uplift forces, overturning moments, and other effects, thereby ensuring the long-term stability and safe operation of power facilities.

[0003] Currently, in order to increase anchoring force, some anchor bolts with deployable structures have been developed. Although these mechanically deployable anchor bolts can expand the support range, their deployment mechanism is relatively complex and the installation and operation are cumbersome. Utility Model Content

[0004] The purpose of this utility model is to provide an anchor rod that is easy to install and can effectively expand the anchoring range.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an anchor rod for power construction, comprising: an integrally formed hollow tube and a hollow seat and a top cover, wherein the hollow seat is internally divided into an upper chamber and a lower chamber, and a grouting pipe is provided at the top of the hollow tube, which is vertically inserted along the central axis of the hollow tube, sequentially passes through the top cover and the hollow tube and extends to the bottom of the hollow seat;

[0006] The outer wall of the grouting pipe is provided with a first set of grouting holes corresponding to the upper chamber and a second set of grouting holes corresponding to the lower chamber. The outer wall of the hollow seat is provided with multiple grout outlet holes, which are directly connected to the lower chamber. Each grout outlet hole is covered with a layer of polymer film at its outlet.

[0007] Four movable columns are symmetrically arranged on the hollow seat. The movable columns penetrate the wall of the hollow seat and extend their inner ends into the upper cavity.

[0008] As a further description of the above technical solution: the total flow cross-sectional area of ​​the first group of grouting holes is greater than the total flow cross-sectional area of ​​the second group of grouting holes.

[0009] As a further description of the above technical solution: the first group of grouting holes includes eight holes evenly distributed around the grouting pipe, the second group of grouting holes includes four holes arranged in an alternating manner, and the diameter of the first group of grouting holes is larger than the diameter of the second group of grouting holes.

[0010] As a further description of the above technical solution: the thickness of the polymer film is . mm, and the polymer film is designed to rupture under pressure when the slurry pressure inside the lower chamber reaches a preset threshold.

[0011] As a further description of the above technical solution: two equidistant limiting strips are provided on the outer wall of the grouting pipe along the axial direction, and two limiting grooves that match the depth and width of the limiting strips are processed on the top of the inner wall of the hollow pipe and the inner ring of the top cover. The limiting strips are inserted into the limiting grooves.

[0012] As a further description of the above technical solution: the number of the plurality of slurry outlet holes is twelve, and the slurry outlet holes are evenly distributed on the outer wall of the hollow seat.

[0013] As a further description of the above technical solution: the movable columns are designed such that when the injected anchoring grout causes the pressure in the upper chamber to reach the driving pressure, the four movable columns move outward radially in sync, so that the bottom support structure of the anchor rod changes from a column shape to a cross shape. The driving pressure is lower than the pressure required to rupture the polymer film.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] 1. The injected anchoring grout first creates pressure in the upper chamber, which drives the moving column and then pushes it to unfold. No additional manual intervention or complex mechanical triggering steps are required. After the moving column unfolds, the grout pressure in the lower chamber gradually reaches the preset threshold, which can automatically rupture the grout hole membrane and further start the secondary grouting process, thereby simplifying on-site construction operations and improving construction efficiency.

[0016] 2. Driven by the grouting pressure, the moving column can automatically unfold, significantly expanding the support area at the bottom of the anchor rod, thereby enhancing the pull-out resistance and overall stability of the anchor rod. In addition, the secondary grouting mechanism ensures that the anchoring grout can be discharged from the lower chamber through the grout outlet, effectively filling the gap between the anchor rod and the hole wall, realizing a tight bond between the anchor rod and the surrounding rock and soil, and thus greatly improving the anchoring force. Attached Figure Description

[0017] Figure 1 A front view of the present invention is shown;

[0018] Figure 2 This shows a front view of the movable column of this utility model when it is unfolded;

[0019] Figure 3 An exploded view of this utility model is shown;

[0020] Legend:

[0021] 10. Hollow tube; 11. Hollow seat; 111. Grout outlet hole; 12. Grouting pipe; 121. First set of grouting holes; 122. Second set of grouting holes; 123. Limiting strip; 13. Moving column; 14. Top cover; 15. Limiting groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-3 This utility model provides a technical solution: an anchor rod for power construction, including a hollow tube 10 and a hollow seat 11 integrally formed from high-strength alloy steel. The hollow seat 11 is divided into an upper chamber and a lower chamber, which are used to contain and guide anchoring grout. A grouting pipe 12 serves as the only grout injection channel, which enters from the top, extends vertically along the central axis of the hollow tube 10, passes through the top cover 14 and the hollow tube 10 in sequence, and extends to the bottom of the hollow seat 11.

[0024] Furthermore, in order to achieve step-by-step grouting, two sets of grouting holes with different functions are opened on the outer wall of the grouting pipe 12 at different positions. Eight first-set grouting holes 121 are evenly arranged around the upper chamber; while four second-set grouting holes 122 are staggered at the lower chamber. The overall layout of the first-set grouting holes 121 is closer to the top of the anchor rod.

[0025] Meanwhile, in order to ensure that the anchoring grout preferentially fills the upper chamber and quickly establishes the initial driving pressure, the total flow cross-sectional area of ​​the first group of grouting holes 121 is designed to be three times the total flow cross-sectional area of ​​the second group of grouting holes 122. This design is achieved by setting the number of the first group of grouting holes 121 to be twice that of the second group of grouting holes 122 and designing their diameter to be larger, so that in the initial time of grouting start-up, most of the grout is guided to the upper chamber.

[0026] Furthermore, twelve grout outlet holes 111 are distributed on the outer wall of the hollow seat 11. These grout outlet holes 111 are directly connected to the lower chamber. During the anchor bolt installation and initial grouting stage, the outlet of each grout outlet hole 111 is covered with a 0.2 mm thick polymer film. This film can automatically rupture under pressure when the grout pressure inside the lower chamber accumulates to a certain level. The polymer film is used to temporarily seal the grout outlet hole 111 before the anchor bolt is deployed to prevent premature loss.

[0027] Furthermore, four movable columns 13 are symmetrically arranged on the hollow seat 11. Their structure penetrates the wall of the hollow seat 11 and extends to the upper chamber. When the injected anchoring grout causes the pressure in the upper chamber to reach a certain level, the pressure can drive all four movable columns 13 to move outward radially in sync.

[0028] After the movable column 13 is fully deployed, the bottom support structure of the anchor rod changes from the initial column shape to a stable cross shape, expanding its effective support area. Without any additional manual intervention or complex mechanical triggering, as the grouting pressure continues to rise, the strong internal pressure will automatically rupture the membrane covering the grout hole 111, thereby initiating the secondary grouting process, injecting the grout evenly into the anchor hole, and completing the final anchoring. This series of automated processes greatly simplifies on-site construction operations.

[0029] Driven precisely by the grouting pressure, the movable column 13 is automatically deployed, significantly increasing the support area at the bottom of the anchor bolt, improving the anchor bolt's pull-out resistance, and enhancing overall stability.

[0030] Furthermore, a top cover 14 is installed on the top of the hollow tube 10. To ensure the stability of the grouting pipe 12, two equidistant limiting strips 123 are provided on its outer wall along the axial direction. Correspondingly, two limiting grooves 15 with perfectly matched depth and width are machined on the top of the inner wall of the hollow tube 10 and the inner ring of the top cover 14. During installation, the two limiting strips 123 on the grouting pipe 12 will be precisely inserted into the limiting grooves 15 to form a locking structure, which effectively prevents any axial movement or circumferential rotation that may be caused during high-pressure grouting.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An anchor bolt for power construction, characterized in that, include: The hollow tube (10), hollow seat (11), and top cover (14) are integrally formed. The hollow seat (11) is divided into an upper chamber and a lower chamber. A grouting pipe (12) is provided at the top of the hollow tube (10) and runs vertically along the central axis of the hollow tube (10), passing through the top cover (14), the hollow tube (10), and extending to the bottom of the hollow seat (11). The outer wall of the grouting pipe (12) is provided with a first set of grouting holes (121) corresponding to the upper chamber and a second set of grouting holes (122) corresponding to the lower chamber. The outer wall of the hollow seat (11) is provided with a plurality of grout outlet holes (111). The grout outlet holes (111) are directly connected to the lower chamber, and each grout outlet hole (111) is covered with a layer of polymer film at its outlet. Four movable columns (13) are symmetrically arranged on the hollow seat (11). The movable columns (13) penetrate the wall of the hollow seat (11) and their inner ends extend into the upper cavity.

2. The anchor bolt for power construction according to claim 1, characterized in that: The total flow cross-sectional area of ​​the first group of grouting holes (121) is greater than the total flow cross-sectional area of ​​the second group of grouting holes (122).

3. The anchor bolt for power construction according to claim 1, characterized in that: The first group of grouting holes (121) includes eight holes evenly distributed around the grouting pipe (12), and the second group of grouting holes (122) includes four holes arranged in an alternating manner. The diameter of the first group of grouting holes (121) is larger than the diameter of the second group of grouting holes (122).

4. The anchor bolt for power construction according to claim 1, characterized in that: The polymer film has a thickness of 0.2 mm and is designed to rupture under pressure when the slurry pressure inside the lower chamber reaches a preset threshold.

5. An anchor bolt for power construction according to claim 1, characterized in that: Two equidistant limiting strips (123) are provided on the outer wall of the grouting pipe (12) along the axial direction. The top of the inner wall of the hollow pipe (10) and the inner ring of the top cover (14) are both machined with two limiting grooves (15) that match the depth and width of the limiting strips (123). The limiting strips (123) are inserted into the limiting grooves (15).

6. The anchor bolt for power construction according to claim 1, characterized in that: The number of the plurality of slurry outlet holes (111) is twelve, and the slurry outlet holes (111) are evenly distributed on the outer wall of the hollow seat (11).

7. An anchor bolt for power construction according to claim 4, characterized in that: The movable columns (13) are designed such that when the injected anchoring grout causes the pressure in the upper chamber to reach the driving pressure, the four movable columns (13) move outward radially in sync, so that the bottom support structure of the anchor rod changes from a column shape to a cross shape. The driving pressure is lower than the pressure required to rupture the polymer film.

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