Multi-layer anchor disc structure applied to expanded head anchor rod

Abstract

The utility model relates to the technical field of geotechnical engineering anchoring, in particular to a multi-layer anchor disc structure applied to an expanded head anchor rod. Comprising a center rod; a plurality of layers of bosses are arranged on the center rod, and the upper end face of each layer of boss is rotatably connected with a plurality of blades; the blades corresponding to each layer of bosses are distributed in a circumferential array mode, and each blade can be unfolded to an unfolding position or rotate upwards to a folding position relative to the corresponding boss; and an elastic device is arranged between each blade and the corresponding boss, so that the blade tends to move towards the unfolding position. The anti-pulling bearing capacity of a single anchor rod is improved through a multi-layer structure, the stress system of the anchor rod is changed, the concentrated stress condition is dispersed, and the anti-risk capacity of the technology is improved.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering anchoring technology, specifically a multi-layer anchor plate structure applied to expanded head anchor rods. Background Technology

[0002] In geotechnical engineering, extended-head anchors, as crucial pull-out structural components, directly impact the safety and reliability of the entire anchoring system due to the mechanical properties of their anchor disc structure. In traditional anchoring engineering practice, single-layer anchor disc structures have long dominated. These structures typically employ a single bearing surface design. However, practical engineering applications reveal significant technical defects in existing single-layer anchor discs under complex conditions: First, stress distribution exhibits a unipolar concentration pattern, with insufficient contact area at the anchoring interface leading to excessive local compressive stress, easily causing anchor disc embedding failure in soft rock formations; second, structural redundancy is lacking, making them prone to overall failure when the bearing surface experiences corrosion, rock creep, or impact loads; third, they have weak adaptability to irregular geological formations, particularly when facing jointed strata or composite layered rock masses, making effective multi-directional stress transfer difficult. Existing technological improvements primarily focus on enhancing material strength but fail to address the fundamental defects of single-layer structures.

[0003] Therefore, developing multi-layer anchor plate structures with a collaborative stress-bearing mechanism and establishing effective interlayer stress transfer paths have become key technological breakthroughs for solving the current reliability deficiencies of anchoring systems. Utility Model Content

[0004] To address the above problems, this utility model proposes the following technical solution:

[0005] A multi-layer anchor plate structure for use in expanded head anchor bolts includes a central rod; multiple bosses are provided on the central rod, and multiple blades are rotatably connected to the upper surface of each boss; the blades corresponding to each boss are distributed in a circumferential array, and each blade can be unfolded to an unfolded position or rotated upward to a retracted position relative to the corresponding boss; an elastic device is provided between each blade and the corresponding boss, so that the blade tends to move towards the unfolded position.

[0006] Preferably, the distance between two adjacent bosses is greater than the length of the blade on the lower boss.

[0007] Preferably, the number of layers of the boss is two.

[0008] Preferably, the elastic device is a torsion spring.

[0009] Preferably, the blades on adjacent protrusions are arranged in an alternating phase configuration.

[0010] Preferably, the width of the outer side of the blade is greater than the width of the inner side.

[0011] Beneficial effects:

[0012] This invention enhances the pull-out bearing capacity of a single anchor rod through a multi-layered structure, altering the anchor rod's stress system and dispersing concentrated stress, thereby improving the technology's resilience. It is particularly suitable for applications in underground engineering anti-buoyancy, slope reinforcement, foundation pit support, and new energy foundation anchoring. It can be widely used for supporting mine roadways, mining areas, railways, tunnels, and underground caverns, and also for dam foundation or slope reinforcement, foundation pit support, structural anti-buoyancy and anti-tilting, landslide control, rock mechanics field testing, and new energy foundation anchoring. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the unfolded state of an embodiment of the present invention;

[0014] Figure 2 This is a top view of the unfolded state of an embodiment of the present invention;

[0015] Figure 3 This is a three-dimensional view of the retracted state of an embodiment of the present invention;

[0016] Reference numerals: 1-Center rod, 2-First boss, 3-Second boss, 4-Torsion spring, 5-First blade, 6-Second blade. Detailed Implementation

[0017] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] like Figure 1 As shown, a multi-layer anchor plate structure for use in expanded head anchor bolts includes a central rod 1; two layers of bosses are provided on the central rod, namely a first boss 2 and a second boss 3, and multiple blades are rotatably connected to the upper surface of each layer of bosses; the blades connected to the first boss 2 and the second boss 3 are respectively the first blade 5 and the second blade 6; the blades corresponding to each layer of bosses are distributed in a circumferential array; as shown... Figure 1 and Figure 3 As shown, each blade can be unfolded to the unfolded position or rotated upward to the retracted position relative to the corresponding boss; an elastic device is provided between each blade and the corresponding boss, so that the blade tends to move towards the unfolded position.

[0019] In a preferred embodiment, the distance between the first boss 2 and the second boss 3 is greater than the length of the second blade 6 on the second boss 3. This avoids interference between the two layers of blades during movement. Firstly, it prevents jamming due to mutual interference during the unfolding process, resulting in incomplete unfolding. Secondly, it achieves a better folding effect, meaning that the diameter is smaller when folded.

[0020] In a preferred embodiment, the elastic device is a torsion spring 4. Because torsion springs have a simple structure and small deformation, they can enhance stability under harsh working conditions and prevent problems such as jamming of the elastic device during operation.

[0021] like Figure 2 As shown, in a preferred embodiment, the blades on adjacent protrusions are arranged with staggered phases. By staggering the circumferential phases of adjacent layers of blades, the upper and lower layers of blades form a spatially complementary relationship after deployment. This arrangement effectively disperses the anchoring load, avoids stress concentration, and ensures that the load is uniformly transmitted along the central rod axial direction. When the system is subjected to external tensile force, the staggered blades can form a multi-layered three-dimensional support structure, significantly improving the pull-out bearing capacity of the overall anchoring system. Even in some embodiments where the distance between the first protrusion 2 and the second protrusion 3 is less than the length of the second blade 6 on the second layer protrusion 3, the staggered phase design ensures that the upper and lower layers of blades maintain independent movement trajectories during deployment. The deployment paths of adjacent layers of blades are staggered in both the radial and circumferential directions, completely eliminating the risk of movement interference between layers of blades in the deployed / retracted state.

[0022] In a preferred embodiment, the width of the outer side of the blade is greater than the width of the inner side. The width of the inner side of the blade is constrained by the space on the upper surface of the boss. Increasing the width of the outer side of the blade can increase the area when unfolded without changing the width of the inner side, thereby enhancing the anchoring effect.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-layer anchor plate structure applied to an expanded-head anchor bolt, characterized in that, It includes a central rod; multiple bosses are provided on the central rod, and multiple blades are rotatably connected to the upper surface of each boss; the blades corresponding to each boss are distributed in a circumferential array, and each blade can be unfolded to the unfolded position or rotated upward to the retracted position relative to the corresponding boss; an elastic device is provided between each blade and the corresponding boss, so that the blade has a tendency to move towards the unfolded position.

2. The multi-layer anchor plate structure applied to an expanded-head anchor bolt according to claim 1, characterized in that, The distance between two adjacent bosses is greater than the length of the blade on the lower boss.

3. The multi-layer anchor plate structure applied to an expanded-head anchor bolt according to claim 1, characterized in that, The boss has two layers.

4. A multi-layer anchor plate structure for use in expanded head anchor bolts according to claim 1, characterized in that, The elastic device is a torsion spring.

5. A multi-layer anchor plate structure for use in expanded head anchor bolts according to claim 1, characterized in that, The blades on adjacent protrusions are arranged in an alternating phase configuration.

6. A multi-layer anchor plate structure for use in expanded head anchor bolts according to claim 1, characterized in that, The width of the outer side of the blade is greater than the width of the inner side.

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