Combined spiral anchor foundation

Abstract

A combined spiral anchor foundation comprises an anchor rod, a connecting piece arranged at the top end of the anchor rod and used for being connected with an external driving mechanism, and a plurality of anchor discs distributed in the axis direction of the anchor rod. The anchor rod comprises a rod body and an anchor head, the anchor head is conical, and the rod body is located at the top end of the anchor head. The anchor discs are distributed on the rod body and are spiral, and the outer diameters of the anchor discs distributed on the rod body are sequentially increased from bottom to top. According to the spiral anchor foundation, the multiple anchor discs are distributed on the rod body, the outer diameters of the anchor discs on the rod body are sequentially increased from bottom to top, the outer diameters of the anchor discs on the rod body are sequentially increased from bottom to top, when the spiral anchor foundation is drilled into soil, the torque force of an external driving machine can be gradually increased, and the initial load of the external driving machine is reduced. And the anchor disc located at the lowest end can improve the stability of the whole spiral anchor foundation, and along with drilling of the adjacent anchor discs, the stability of the spiral anchor foundation relative to the land is gradually improved.

Description

Technical Field

[0001] This utility model belongs to the field of ground anchor technology, and in particular relates to a combined spiral anchor foundation. Background Technology

[0002] As a new type of foundation, helical anchor foundations are increasingly being used in various engineering projects due to their advantages such as convenient construction, minimal environmental impact, and adjustable load-bearing capacity. Compared to traditional foundation types, helical anchor foundations can be quickly installed by mechanical screwing, eliminating the need for large-scale earthwork excavation and concrete pouring, significantly shortening the construction cycle and reducing construction costs. However, during the drilling process of helical anchor foundations, when encountering loose soil layers with high gravel content or weak interlayers, the drill rod of the helical anchor is prone to shaking and deviation, causing the drilling trajectory to deviate from the designed path. Utility Model Content

[0003] The purpose of this utility model is to provide a combined spiral anchor foundation to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the specific technical solution of this utility model for a combined helical anchor foundation is as follows:

[0005] A combined helical anchor foundation includes an anchor rod, a connector at the top of the anchor rod for connection to an external drive mechanism, and multiple anchor discs distributed along the axis of the anchor rod. The anchor rod includes a rod body and an anchor head, with the anchor head being conical and the rod body located at the top of the anchor head. The anchor discs are distributed on the rod body and are helical, with the outer diameter of the anchor discs on the rod body increasing from bottom to top.

[0006] Furthermore, an outer anchor cylinder is provided above the uppermost anchor plate on the anchor bolt. The outer anchor cylinder consists of a cylinder body and a helical base, with the helical base located at the bottom end of the cylinder body.

[0007] Furthermore, the inner wall of the spiral base has multiple connecting plates distributed along its spiral direction, and the free end of each connecting plate is connected to the rod body.

[0008] Furthermore, the outer anchor cylinder has multiple positioning holes distributed around its axis, and positioning nuts are provided on the rod body corresponding to the positions of each positioning hole. A screw that mates with the positioning nut can be inserted into the positioning hole, and a fixing nut is threaded to the outer end of the screw.

[0009] Furthermore, a washer is provided on the screw between the cylinder and the fixing nut.

[0010] Furthermore, the connecting component is a flange, and ribs are distributed around the axis of the rod between the flange and the rod body.

[0011] The combined spiral anchor foundation of this utility model has the following advantages:

[0012] This invention features multiple anchor discs distributed along the shaft, with the outer diameter of the discs increasing progressively from bottom to top. This progressively increasing outer diameter allows for a gradual increase in the torque of the external drive motor as the spiral anchor foundation is drilled into the soil, reducing the initial load on the external drive motor. Furthermore, as the spiral anchor foundation is drilled deeper into the soil, the pull-out force exerted by the soil on it gradually increases. The anchor disc at the lowest end enhances the overall stability of the spiral anchor foundation, and the stability of the spiral anchor foundation relative to the soil gradually increases with the drilling of adjacent anchor discs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a combined spiral anchor foundation structure according to the present invention;

[0014] Figure 2 This is a schematic diagram of the rod body, positioning nut, screw and outer anchor cylinder of this utility model;

[0015] Figure 3 This is a schematic diagram of the outer anchor cylinder, cylinder body, and spiral base of this utility model.

[0016] Explanation of markings in the diagram:

[0017] 1. Flange; 2. Rod body; 3. Rib plate; 4. Anchor head; 5. Anchor plate; 6. Outer anchor tube; 7. Positioning nut; 8. Positioning hole; 9. Fixing nut; 10. Screw; 11. Washer; 12. Spiral base; 13. Connecting plate. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, a combined spiral anchor foundation of this utility model will be described in further detail below with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown, this utility model discloses a combined spiral anchor foundation, including an anchor rod, a connector at the top of the anchor rod for connection to an external drive mechanism, and multiple anchor discs 5 distributed along the anchor rod axis. The anchor rod is connected to the external drive mechanism via the connector. Then, the anchor rod is aligned with the desired anchoring position in the ground. The external drive mechanism drives the connector and the anchor rod on the connector to rotate, causing the anchor rod to drill into the ground. The outer wall of the anchor rod in the ground contacts the ground, generating friction and giving the anchor rod a certain pull-out resistance relative to the ground. As the anchor rod drills into the ground, the anchor discs 5 further increase the pull-out resistance of the anchor rod relative to the ground, making the anchor rod more secure.

[0020] Specifically, the anchor bolt includes a bolt body 2 and an anchor head 4, with the bolt body 2 located at the top of the anchor head 4. The anchor head 4 is tapered, which facilitates its positioning and drilling into the soil. Anchor discs 5, used to enhance the anchor bolt's pull-out resistance relative to the soil, are distributed on the bolt body 2. To ensure smooth entry of the anchor discs 5 into the soil, they are spiral-shaped, with their outer diameters increasing sequentially from bottom to top on the bolt body 2. This sequential increase in the outer diameter of the anchor discs 5 on the bolt body 2 allows for a gradual increase in the torque of the external drive unit during drilling into the soil, reducing the initial load on the external drive unit. Furthermore, as the spiral anchor foundation is drilled into the soil, the pull-out force exerted by the soil on the spiral anchor foundation gradually increases. The anchor plate 5 at the lowest end enhances the overall stability of the spiral anchor foundation. With the drilling of adjacent anchor plates 5, the stability of the spiral anchor foundation relative to the soil gradually increases, resulting in greater stability during drilling. To facilitate smoother drilling into the soil, the diameter of the lowest anchor plate 5 on the rod body 2 is designed to increase progressively from bottom to top.

[0021] The connector used to connect the external drive motor and the anchor rod is flange 1, and ribs 3 are distributed around the axis of the anchor rod 2 between flange 1 and the rod body 2. The ribs 3 are used to strengthen the connection between flange 1 and the anchor rod 2.

[0022] An outer anchor cylinder 6 is installed above the uppermost anchor plate 5 on the anchor rod. The outer anchor cylinder 6 provides lateral restraint to the helical anchor foundation through close contact and friction with the surrounding soil. This restraint effectively resists horizontal displacement of the anchor rod, ensuring the stability of the helical anchor foundation under lateral loads (such as wind force, seismic force, etc.). Specifically, the outer anchor cylinder 6 includes a cylinder body and a helical base 12, with the helical base 12 located at the bottom of the cylinder body. Multiple connecting plates 13 are distributed along the helical direction on the inner wall of the helical base 12, and the free ends of each connecting plate 13 are connected to the rod body 2. Figure 1 and Figure 3 As shown, the outer anchor cylinder 6 and the anchor rod are connected by a connecting plate 13 to improve the connection stability between the outer anchor cylinder 6 and the anchor rod. The connecting plate 13 is inclined between the outer anchor cylinder 6 and the anchor rod, providing drilling power during drilling into the soil, allowing the spiral anchor foundation to penetrate the soil more effectively. In this embodiment, preferably three connecting plates 13 are located between the outer anchor cylinder 6 and the anchor rod, and the three connecting plates 13 are evenly distributed at 120 degrees. Of course, the number and position of the connecting plates 13 can be selected according to actual usage, which will not be elaborated further here.

[0023] To improve the connection stability between the outer anchor cylinder 6 and the anchor rod, multiple positioning holes 8 are distributed around the axis of the outer anchor cylinder 6. Positioning nuts 7 are provided on the rod body 2 corresponding to each positioning hole 8. A screw rod 10, which mates with the positioning nut 7, can be inserted into the positioning hole 8, and a fixing nut 9 is threaded onto the outer end of the screw rod 10. The screw rod 10 is inserted through the positioning hole 8 of the outer anchor rod and connected to the positioning nut 7. Then, the fixing nut 9 is tightened onto the outer end of the screw rod 10. This further connects the outer anchor cylinder 6 and the anchor rod, making the connection more stable. To prevent misalignment between the positioning holes 8 on the outer anchor cylinder 6 and the positioning nuts 7 on the anchor rod, the positioning holes 8 on the outer anchor cylinder 6 are designed as transverse elongated slots to facilitate the adjustment of the screw rod 10's position.

[0024] In order to prevent excessive torque from damaging the outer anchor cylinder 6 when the fixing nut 9 is connected to the screw 10, a washer 11 is provided on the screw 10 between the cylinder body and the fixing nut 9.

[0025] Instructions for use: Connect flange 1 on the external drive motor to flange 1 on the spiral anchor foundation. Then, use the external drive motor to move the spiral anchor foundation to the drilling location and align the anchor head 4 with the drilling location. After that, control the external drive motor to rotate the spiral anchor foundation and extend it into the ground to the appropriate depth.

[0026] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A combined helical anchor foundation, characterized in that: Includes anchor bolts, a connector located at the top of the anchor bolt for connection with an external drive mechanism, and multiple anchor discs distributed along the axis of the anchor bolt (5); The anchor bolt includes a bolt body (2) and an anchor head (4), and the anchor head (4) is tapered, with the bolt body (2) located at the top of the anchor head (4); Anchor discs (5) are distributed on the rod body (2), and the anchor discs (5) are spiral-shaped. The outer diameter of the anchor discs (5) distributed on the rod body (2) increases from bottom to top.

2. The combined helical anchor foundation according to claim 1, characterized in that: An outer anchor cylinder (6) is provided above the anchor plate (5) at the uppermost end of the anchor rod; The outer anchor cylinder (6) includes a cylinder body and a spiral base (12), with the spiral base (12) located at the bottom end of the cylinder body.

3. A combined helical anchor foundation according to claim 2, characterized in that: The inner wall of the spiral base (12) is provided with multiple connecting plates (13) along its spiral direction, and the free end of each connecting plate (13) is connected to the rod body (2).

4. A combined helical anchor foundation according to claim 3, characterized in that: The outer anchor cylinder (6) has multiple positioning holes (8) distributed around its axis, and a positioning nut (7) is provided on the rod body (2) corresponding to each positioning hole (8). A screw (10) that cooperates with the positioning nut (7) can be inserted into the positioning hole (8), and a fixing nut (9) is threaded to the outer end of the screw (10).

5. A combined helical anchor foundation according to claim 4, characterized in that: A washer (11) is provided on the screw (10) between the cylinder and the fixing nut (9).

6. A combined screw anchor foundation according to claim 5, characterized in that ； The connecting component is a flange (1), and ribs (3) are distributed around the axis of the rod (2) between the flange (1) and the rod (2).

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