Expansion type ground anchor

Abstract

The utility model discloses an expansion type ground anchor, which relates to the field of ground anchor structures and comprises a fixing pipe, an expansion anchor head is arranged at the bottom of the fixing pipe and comprises at least three expansion blocks, the expansion blocks are annularly arranged at the bottom of the fixing pipe, and an annular adjusting cavity is defined by the expansion blocks. The aperture of the adjusting cavity is gradually reduced in the direction from the fixed pipe to the expansion block, an adjusting piece is arranged between the adjusting cavity and the fixed pipe, and an expansion plate is arranged on the expansion block; according to the expansion type ground anchor, expansion of the expansion anchor head embedded underground is achieved through the adjusting piece, so that the contact area and friction force between the ground anchor and soil or rock are increased, the anchoring effect of the ground anchor is enhanced, follow-up frequent maintenance and reinforcement are avoided, the engineering cost is reduced, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the field of ground anchor structures, in particular to an expandable ground anchor. Background Technique

[0002] In civil engineering and the construction industry, ground anchors are important components to ensure the stability and safety of structures. Traditional ground anchors are mainly driven into the ground physically (such as by hammering, vibration, etc.), relying on the frictional force and anchoring force of soil or rock to fix the upper structure. However, the anchoring force of the ground anchor highly depends on its embedding depth and the surrounding geological conditions, and it is difficult to maintain a stable anchoring effect in complex and variable geological environments; especially in areas with complex geological conditions, loose soil or fissures, it is even more difficult to ensure the anchoring effect of traditional ground anchors, and frequent maintenance and reinforcement are required, which not only increases the project cost but also prolongs the construction period. Content of the Utility Model

[0003] The purpose of the utility model is to provide an expandable ground anchor. This expandable ground anchor realizes the expansion of the buried expansion anchor head through an adjusting part, thereby increasing the contact area and frictional force between the ground anchor and the soil or rock, further enhancing the anchoring effect of the ground anchor, avoiding subsequent frequent maintenance and reinforcement, reducing the project cost, and shortening the construction period.

[0004] The above optimized structure of the utility model is achieved through the following technical solution: An expandable ground anchor includes a fixed pipe. An expansion anchor head is provided at the bottom of the fixed pipe. The expansion anchor head includes at least three expansion blocks. A plurality of the expansion blocks are annularly arranged at the bottom of the fixed pipe. A plurality of the expansion blocks enclose an annular adjusting cavity. The aperture of the adjusting cavity gradually decreases from the fixed pipe to the direction of the expansion blocks. An adjusting part is provided between the adjusting cavity and the fixed pipe. An expansion plate is provided on the expansion block.

[0005] In some embodiments, the adjusting part includes an adjusting rod. The adjusting rod is in threaded cooperation with the fixed pipe. A connecting rod is provided at the bottom of the adjusting rod. An adjusting head is provided at the bottom of the connecting rod. The adjusting head is arranged in the adjusting cavity and is in contact with the surfaces of a plurality of the expansion blocks.

[0006] In some embodiments, a connecting pipe is provided at the top of a plurality of the expansion blocks. The connecting pipe is in threaded cooperation with the bottom of the fixed pipe.

[0007] In some embodiments, at least three rotating grooves are provided at the bottom of the fixed pipe. A fixed rod is arranged in the rotating groove. A rotatable rotating plate is provided on the fixed rod. The rotating plate is fixedly connected to the expansion block. A torsion spring is provided between the rotating plate and the fixed rod.

[0008] In some embodiments, the bottoms of the three expansion plates enclose a hollow cone.

[0009] In some embodiments, the adjusting head is a spherical plug cap.

[0010] In some embodiments, an adjusting cap is provided at the top of the adjusting rod.

[0011] In some embodiments, an inverted hanging wedge is provided at the bottom of the expansion plate.

[0012] In some embodiments, the cross-section of the adjusting cavity is an inverted isosceles triangle.

[0013] In summary, the present utility model has the following beneficial effects:

[0014] By rotating the adjusting rod, the adjusting head moves downward, extruding the expansion block, forcing the expansion block to expand outward, and at the same time driving the expansion plate to unfold, forming a stable anchoring structure, increasing the lateral contact area between the ground anchor and the soil or rock, thereby increasing the friction between the ground anchor and the soil or rock, further enhancing the anchoring effect of the ground anchor, avoiding subsequent frequent maintenance and reinforcement, and at the same time having a simple structure, convenient installation, reducing engineering costs, shortening the construction period, and being applicable to various complex geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of the present utility model;

[0016] Figure 2 is a cross-sectional structural diagram of the adjusting member of the present utility model;

[0017] Figure 3 is a schematic connection diagram of the connecting pipe and the expansion block in Embodiment 1 of the present utility model;

[0018] Figure 4 is the present utility model Figure 3 of the cross-sectional view;

[0019] Figure 5 is a cross-sectional connection diagram of the expansion block in the fixed pipe in Embodiment 2 of the present utility model.

[0020] In the figure: 1, fixed pipe; 11, rotating groove; 2, expansion anchor head; 21, expansion block; 22, expansion plate; 23, adjusting cavity; 24, connecting pipe; 25, rotating plate; 26, inverted hanging wedge; 3, adjusting member; 31, adjusting rod; 32, connecting rod; 33, adjusting head; 34, adjusting cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1:

[0023] Reference Figures 1-4 , an expandable ground anchor mainly includes three major parts: a fixed pipe 1, an expansion anchor head 2, and an adjusting member 3.

[0024] The bottom of the fixed pipe 1 is provided with an expansion anchor head 2. The expansion anchor head 2 includes at least three expansion blocks 21. The expansion blocks 21 can be arc-shaped blocks, and the cross-section of the arc-shaped block is a rectangle with an inclined side. These expansion blocks 21 are arranged in a ring at the bottom of the fixed pipe 1 and enclose an annular adjusting cavity 23. The aperture of the adjusting cavity 23 gradually decreases from the fixed pipe 1 towards the expansion block 21 direction. The cross-section of the adjusting cavity 23 can be an inverted isosceles triangle, which is beneficial for the adjusting head 33 to more effectively squeeze the expansion blocks 21 when moving downward. An adjusting member 3 is provided between the adjusting cavity 23 and the fixed pipe 1. An expansion plate 22 is provided on each expansion block 21. The shape of the expansion plate 22 is adapted to that of the expansion block 21 and can be welded and fixed, which can increase the contact area with the soil during the expansion process of the expansion anchor head 2, thereby enhancing the anchoring effect of the ground anchor; at the same time, the strength of the expansion blocks 21 can be enhanced.

[0025] The adjusting member 3 is used to control the expansion degree of the expansion anchor head 2, facilitating the adjustment of the anchoring force according to actual needs. It includes an adjusting rod 31, a connecting rod 32, and an adjusting head 33. The adjusting rod 31 is coaxially arranged with the fixed pipe 1 and is in threaded cooperation with the fixed pipe 1. The bottom of the adjusting rod 31 is provided with a connecting rod 32, and the bottom of the connecting rod 32 is provided with an adjusting head 33. The adjusting head 33 is arranged in the adjusting cavity 23 and is in contact with the surfaces of multiple expansion blocks 21. By rotating the adjusting rod 31, the connecting rod 32 and the adjusting head 33 can be driven to move in the adjusting cavity 23, thereby realizing the extrusion and expansion of the expansion blocks 21.

[0026] In some embodiments, the top of the adjusting rod 31 is provided with an adjusting cap 34. The adjusting cap 34 can be a regular hexagonal cap and can be coaxially welded and fixed on the adjusting rod 31, facilitating the use of tools to rotate the adjusting rod 31, thereby facilitating the adjustment of the expansion anchor head 2.

[0027] In some embodiments, a connecting pipe 24 is provided at the top of the plurality of expansion blocks 21. The connecting pipe 24 is in screw fit with the bottom of the fixing pipe 1, ensuring the stable connection between the expansion anchor head 2 and the fixing pipe 1. At the same time, it is convenient for the later maintenance and replacement of the expansion anchor head 2. The thickness of the connection between the plurality of expansion blocks 21 and the connecting pipe 24 is small. While ensuring sufficient connection strength between the expansion blocks 21 and the connecting pipe 24, the expansion blocks 21 can rotate to a certain extent on the connecting pipe 24, so as to realize the expansion of the expansion blocks 21 driving the expansion plate 22.

[0028] In some embodiments, the bottoms of the three expansion plates 22 enclose a hollow cone, which can reduce the area of contact between the ground anchor and the ground, thereby reducing the resistance when the ground anchor is driven into the ground.

[0029] In some embodiments, the adjusting head 33 can be a spherical bolt cap, which is convenient for the adjusting head 33 to rotate following the adjusting rod 31, so as to smoothly move in the adjusting cavity 23 and uniformly squeeze the expansion blocks 21.

[0030] In some embodiments, an inverted wedge 26 is provided at the bottom of the expansion plate 22, which can increase the contact area and friction between the expansion anchor head 2 and the soil or rock, and further enhance the anchoring effect of the ground anchor.

[0031] The specific working principle is as follows:

[0032] During specific installation, first place the ground anchor vertically at the set anchor point, place the expansion anchor head 2 on the ground, and drive the ground anchor into the ground through physical means (such as hammering, vibration, etc.). After the ground anchor is driven to the set depth, rotate the adjusting rod 31 to drive the connecting rod 32 to drive the adjusting head 33 to move downward in the adjusting cavity 23. As the adjusting head 33 gradually penetrates, it exerts a squeezing effect on the expansion blocks 21, forcing the expansion blocks 21 to expand outward, and at the same time driving the expansion plate 22 to unfold, forming a stable anchoring structure. At this time, the inverted wedge 26 at the bottom of the expansion plate 22 will penetrate into the soil, further increasing the anchoring force. When the required anchoring force is reached, stop rotating the adjusting rod 31 to complete the installation.

[0033] Embodiment 2:

[0034] Reference Figure 5 In this embodiment, the difference from Embodiment 1 is:

[0035] At least three rotating grooves 11 are provided at the bottom of the fixed pipe 1. A fixed rod is provided in the rotating groove 11. A rotatable rotating plate 25 is provided on the fixed rod. The rotating plate 25 is fixedly connected to the expansion block 21. When the adjusting rod 31 rotates, it drives the adjusting head 33 to slide in the adjusting cavity 23. The adjusting head 33 presses the expansion block 21, causing the expansion block 21 to drive the expansion plate 22 to expand outwards, thereby increasing the contact area and friction between the expansion anchor head 2 and the soil or rock, and further enhancing the anchoring effect of the ground anchor. A torsion spring is provided between the rotating plate 25 and the fixed rod. When the ground anchor is taken out and the adjusting head 33 does not press the expansion block 21, the expansion block 21 is automatically reset through the torsion spring, thereby realizing the reuse of the ground anchor.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An expandable ground anchor, characterized in that: It includes a fixed pipe (1), an expansion anchor head (2) is provided at the bottom of the fixed pipe (1), the expansion anchor head (2) includes at least three expansion blocks (21), a plurality of the expansion blocks (21) are arranged in a ring at the bottom of the fixed pipe (1), a plurality of the expansion blocks (21) enclose an annular adjustment cavity (23), the aperture of the adjustment cavity (23) gradually decreases from the fixed pipe (1) towards the expansion block (21), an adjustment member (3) is provided between the adjustment cavity (23) and the fixed pipe (1), and an expansion plate (22) is provided on the expansion block (21).

2. The inflatable ground anchor according to claim 1, characterized in that: The adjustment member (3) includes an adjustment rod (31), the adjustment rod (31) is in threaded fit with the fixed pipe (1), a connecting rod (32) is provided at the bottom of the adjustment rod (31), an adjustment head (33) is provided at the bottom of the connecting rod (32), the adjustment head (33) is arranged in the adjustment cavity (23) and is in contact with the surfaces of a plurality of the expansion blocks (21).

3. The inflatable ground anchor according to claim 1, characterized in that: A connecting pipe (24) is provided at the top of a plurality of the expansion blocks (21), and the connecting pipe (24) is in threaded fit with the bottom of the fixed pipe (1).

4. The inflatable ground anchor according to claim 1, characterized in that: At least three rotating grooves (11) are provided at the bottom of the fixed pipe (1), a fixed rod is provided in the rotating groove (11), a rotatable rotating plate (25) is provided on the fixed rod, the rotating plate (25) is fixedly connected to the expansion block (21), and a torsion spring is provided between the rotating plate (25) and the fixed rod.

5. The inflatable ground anchor according to claim 1, characterized in that: The bottoms of three of the expansion plates (22) enclose a hollow cone.

6. The inflatable ground anchor according to claim 2, characterized in that: The adjustment head (33) is a spherical bolt cap.

7. The inflatable ground anchor according to claim 2, characterized in that: An adjustment cap (34) is provided at the top of the adjustment rod (31).

8. The inflatable ground anchor according to claim 1, characterized in that: An inverted wedge (26) is provided at the bottom of the expansion plate (22).

9. The inflatable ground anchor according to claim 1, characterized in that: The cross-section of the adjustment cavity (23) is an inverted isosceles triangle.

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