Anchoring device for foundation pit supporting

Abstract

The utility model discloses an anchoring device for foundation pit supporting, which relates to the technical field of foundation pit supporting and comprises an anchor rod, a movable rod is inserted into the anchor rod in a sliding mode, a grouting through hole is formed in the axis position of the movable rod, an anchor head is arranged at the front end of the anchor rod, a grout outlet hole communicated with the grouting through hole is formed in the side wall of the anchor head, and the grouting through hole is communicated with the grouting through hole. A plurality of anchoring mechanisms are arranged on the outer wall of the anchor rod, each anchoring mechanism is composed of a plurality of anchoring assemblies, and each anchoring assembly is composed of three anchoring barbs. The anchor rod is arranged on the side wall of the pit foundation, so that the holding force point between the anchor rod and cured cement in the pit hole in the side wall of the pit foundation is more sufficient, the anchoring barb can be freely switched between upwarp and horizontal placement through the adjusting mechanism acting on the anchoring barb, and the anchor rod can be more conveniently inserted into the pit hole in the side wall of the pit foundation in the horizontal placement state.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to an anchoring device for foundation pit support. Background Art

[0002] Pit support can support the sidewalls of excavated pits deeper than 3 meters. During installation, anchor holes are first drilled in the sidewalls of the pit. Anchor rods are then driven into the holes. Cement slurry is poured between the rods and the hole walls, and the slurry solidifies to form an anchor. A retaining wall is then installed on the sidewalls of the pit, and anchors and pads are attached to the outer ends of the strands.

[0003] However, existing anchor rods used in foundation pit support typically employ a threaded structure. During use, the anchoring action is achieved through contact between the external threads of the anchor rod and the solidified cement slurry, forming an anchor body. This approach places all claw force points on the threads of the anchor rod, resulting in a less than optimal anchoring effect. Therefore, an anchoring device for foundation pit support has been proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an anchoring device for foundation pit support to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anchoring device for foundation pit support, comprising an anchor rod, a movable rod is slidably inserted into the interior of the anchor rod, a grouting through-hole is opened at the axial position of the movable rod, an anchor head is provided at the front end of the anchor rod, a slurry outlet hole connected to the grouting through-hole is provided on the side wall of the anchor head, a plurality of anchoring mechanisms are provided on the outer wall of the anchor rod, the anchoring mechanism is composed of a plurality of anchoring assemblies, the anchoring assembly is composed of three anchoring hooks, one end of the anchoring hook is rotatably connected to a first U-shaped plate, the first U-shaped plate is fixedly connected to the outer wall of the anchor rod, the three first U-shaped plates are in a ring array, and an adjustment mechanism is provided between the movable rod and the three anchoring hooks.

[0006] As a further preferred embodiment of the present technical solution, the outer surface of the anchor rod is provided with an external thread.

[0007] As a further preferred embodiment of the present technical solution, a plurality of the anchoring assemblies are arranged in a straight line along the axial direction of the anchor rod.

[0008] As a further preferred embodiment of the present technical solution, the adjustment mechanism consists of a connecting rod, a second U-shaped plate and a third U-shaped plate. The third U-shaped plate is fixedly installed on the side walls of the three anchoring hooks. A connecting rod is rotatably connected between the two parallel plates of the third U-shaped plate. The other end of the connecting rod is rotatably connected to the second U-shaped plate. The second U-shaped plate is fixedly connected to the outer wall of the movable rod. A movable groove for accommodating the second U-shaped plate is provided on the side wall of the anchor rod, and the movable groove is slidably fitted with the second U-shaped plate.

[0009] As a further preferred embodiment of the present technical solution, a limiting hole passing through the anchor rod is provided on the rear end side wall of the anchor rod, a limiting rod is slidably inserted into the limiting hole, and a first matching hole and a second matching hole passing through the movable rod are provided on the rear end side wall of the movable rod.

[0010] As a further preferred embodiment of the present technical solution, the first matching hole and the second matching hole are distributed in sequence toward the front end direction of the movable rod, and the apertures of the first matching hole and the second matching hole are both equal to the aperture of the limiting hole.

[0011] As a further preferred embodiment of the present technical solution, the rear end of the anchor rod is provided with a slurry stop plug, the inner diameter of the slurry stop plug is larger than the outer diameter of the anchor rod, and a nut is provided on the side of the slurry stop plug away from the anchor head, and the nut is connected to the anchor rod through threaded cooperation.

[0012] The utility model provides an anchoring device for foundation pit support, which has the following beneficial effects:

[0013] The utility model adopts a unique structural design, in which an anchoring hook is added to the traditional threaded anchor rod, so that the gripping points between the anchor rod and the solidified cement in the pit hole on the side wall of the pit foundation can be more sufficient. At the same time, by setting an adjustment mechanism acting on the anchoring hook, the anchoring hook can be freely switched between tilting and laying flat. In the laying flat state, the anchor rod can be more conveniently inserted into the pit hole on the side wall of the pit foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembly of the overall structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the front end structure of the anchor rod in the utility model;

[0017] Figure 4 This is a schematic diagram of the rear end of the anchor rod in the present invention;

[0018] In the figure: 1. Anchor rod; 2. External thread; 3. Anchor head; 4. Slurry outlet hole; 5. Movable rod; 6. Grouting through hole; 7. Slurry stopper; 8. Nut; 9. Limit rod; 10. Anchoring hook; 11. Connecting rod; 12. Movable groove; 13. Limit hole; 14. First matching hole; 15. Second matching hole; 16. First U-shaped plate; 17. Second U-shaped plate; 18. Third U-shaped plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, an anchoring device for foundation pit support includes an anchor rod 1, the outer surface of the anchor rod 1 is provided with an external thread 2, a movable rod 5 is slidably inserted inside the anchor rod 1, a grouting through hole 6 is opened at the axial position of the movable rod 5, the front end of the anchor rod 1 is provided with an anchor head 3, and the side wall of the anchor head 3 is provided with a slurry outlet hole 4 connected to the grouting through hole 6, a plurality of anchoring mechanisms are provided on the outer wall of the anchor rod 1, the anchoring mechanism is composed of a plurality of anchoring components, and the plurality of anchoring components are arranged in a straight line along the axial direction of the anchor rod 1, and the anchoring component is composed of three anchoring hooks 10, one end of the anchoring hook 10 is rotatably connected to a first U-shaped plate 16, the first U-shaped plate 16 is fixedly connected to the outer wall of the anchor rod 1, and the three first U-shaped plates 16 are in a ring array, and an adjustment mechanism is provided between the movable rod 5 and the three anchoring hooks 10.

[0021] Among them, the adjustment mechanism is composed of a connecting rod 11, a second U-shaped plate 17 and a third U-shaped plate 18. The third U-shaped plate 18 is fixedly installed on the side walls of the three anchoring hooks 10. The connecting rod 11 is rotatably connected between the two parallel plates of the third U-shaped plate 18. The other end of the connecting rod 11 is rotatably connected to the second U-shaped plate 17. The second U-shaped plate 17 is fixedly connected to the outer wall of the movable rod 5. A movable groove 12 for accommodating the second U-shaped plate 17 is opened on the side wall of the anchor rod 1, and the movable groove 12 is slidably fitted with the second U-shaped plate 17.

[0022] By moving the movable rod 5 and pulling the connecting rod 11, the anchoring hook 10 can be controlled to be in a tilted state or a flat state.

[0023] Among them, a limiting hole 13 is provided on the rear end side wall of the anchor rod 1, and a limiting rod 9 is slidably inserted into the limiting hole 13. A first matching hole 14 and a second matching hole 15 are provided on the rear end side wall of the movable rod 5, and the first matching hole 14 and the second matching hole 15 are distributed in sequence toward the front end direction of the movable rod 5. The apertures of the first matching hole 14 and the second matching hole 15 are both equal to the aperture of the limiting hole 13.

[0024] When in use, the movable rod 5 is moved to align the first matching hole 14 on the movable rod 5 with the limiting hole 13 on the anchor rod 1. At this time, the connecting rod 11 will be pulled by the movable rod 5, so that the anchor bar 10 is tilted toward the anchor rod 1, and then the limiting rod 9 is inserted into the limiting hole 13 and the first matching hole 14 in sequence to fix the movable rod 5. At this time, the anchor bar 10 fits the outer surface of the anchor rod 1, which can facilitate the insertion of the anchor rod 1 into the hole drilled on the side wall of the pit foundation. When the hole is filled with cement slurry, the limiting rod 9 is pulled out, and the movable rod 5 is moved to align the second matching hole 15 with the limiting hole 13. At this time, under the push of the connecting rod 11, the anchor bar 10 will tilt upward, thereby forming a barb on the anchor rod 1. Figure 1 After the cement slurry solidifies, the barb can effectively improve the strength of the anchor rod 1.

[0025] Among them, the rear end of the anchor rod 1 is provided with a grouting plug 7, the inner diameter of the grouting plug 7 is larger than the outer diameter of the anchor rod 1, and a nut 8 is provided on the side of the grouting plug 7 away from the anchor head 3. The nut 8 is connected to the anchor rod 1 through threaded cooperation.

[0026] After the anchor rod 1 is inserted into the hole in the side wall of the pit foundation, the slurry stop plug 7 is put on the outer surface of the anchor rod 1, and then the slurry stop plug 7 is used to block the opening of the hole in the side wall of the pit foundation, and by rotating the nut 8, the slurry stop plug 7 is pressed tightly against the opening position of the hole in the side wall of the pit foundation.

[0027] The utility model provides an anchoring device for foundation pit support, and the specific working principle is as follows:

[0028] When in use, move the movable rod 5 so that the first matching hole 14 on the movable rod 5 is aligned with the limiting hole 13 on the anchor rod 1. At this time, the connecting rod 11 will be pulled by the movable rod 5, so that the anchor hook 10 is tilted towards the anchor rod 1. Then, the limiting rod 9 is inserted into the limiting hole 13 and the first matching hole 14 in sequence to fix the movable rod 5. At this time, the anchor hook 10 is attached to the outer surface of the anchor rod 1, which can facilitate the insertion of the anchor rod 1 into the hole drilled on the side wall of the pit foundation. After the hole is in place, the grouting plug 7 is sleeved on the outer surface of the anchor rod 1 and blocks the opening of the hole in the side wall of the pit foundation, and then the cement slurry is injected into the grouting through hole 6. The cement slurry will enter the hole in the side wall of the pit foundation through the slurry outlet hole 4 until the hole in the side wall of the pit foundation is filled with cement slurry. At this time, the limiting rod 9 is pulled out, and the movable rod 5 is moved to align the second matching hole 15 with the limiting hole 13. Under the push of the connecting rod 11, the anchor hook 10 will be tilted upward, thereby forming a hook on the anchor rod 1. Figure 1 , then insert the limiting rod 9 into the limiting hole 13 and the second matching hole 15 to fix the movable rod 5. After waiting for the cement slurry to solidify, the hook can effectively improve the firmness of the anchor rod 1.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anchoring device for foundation pit support, comprising an anchor rod (1), characterized in that: A movable rod (5) is slidably inserted into the interior of the anchor rod (1), a grouting through hole (6) is opened at the axial position of the movable rod (5), an anchor head (3) is provided at the front end of the anchor rod (1), a slurry outlet hole (4) connected to the grouting through hole (6) is provided on the side wall of the anchor head (3), a plurality of anchoring mechanisms are provided on the outer wall of the anchor rod (1), the anchoring mechanism is composed of a plurality of anchoring components, the anchoring components are composed of three anchoring hooks (10), one end of the anchoring hook (10) is rotatably connected to a first U-shaped plate (16), the first U-shaped plate (16) is fixedly connected to the outer wall of the anchor rod (1), and the three first U-shaped plates (16) are in a ring array, and an adjustment mechanism is provided between the movable rod (5) and the three anchoring hooks (10).

2. The anchoring device for foundation pit support according to claim 1, characterized in that: The outer surface of the anchor rod (1) is provided with an external thread (2).

3. The anchoring device for foundation pit support according to claim 1, characterized in that: A plurality of the anchoring assemblies are arranged in a straight line along the axial direction of the anchor rod (1).

4. The anchoring device for foundation pit support according to claim 1, characterized in that: The adjustment mechanism consists of a connecting rod (11), a second U-shaped plate (17) and a third U-shaped plate (18). The third U-shaped plate (18) is fixedly installed on the side walls of the three anchoring hooks (10). A connecting rod (11) is rotatably connected between the two parallel plates of the third U-shaped plate (18). The other end of the connecting rod (11) is rotatably connected to the second U-shaped plate (17). The second U-shaped plate (17) is fixedly connected to the outer wall of the movable rod (5). A movable groove (12) for accommodating the second U-shaped plate (17) is opened on the side wall of the anchor rod (1), and the movable groove (12) is slidably fitted with the second U-shaped plate (17).

5. The anchoring device for foundation pit support according to claim 1, characterized in that: A limiting hole (13) penetrating the anchor rod (1) is provided on the rear end side wall of the anchor rod (1), a limiting rod (9) is slidably inserted into the limiting hole (13), and a first matching hole (14) and a second matching hole (15) penetrating the movable rod (5) are provided on the rear end side wall of the movable rod (5).

6. The anchoring device for foundation pit support according to claim 5, characterized in that: The first matching hole (14) and the second matching hole (15) are distributed in sequence toward the front end of the movable rod (5), and the diameters of the first matching hole (14) and the second matching hole (15) are both equal to the diameter of the limiting hole (13).

7. The anchoring device for foundation pit support according to claim 1, characterized in that: The rear end of the anchor rod (1) is sleeved with a grout stopper (7), the inner diameter of the grout stopper (7) is larger than the outer diameter of the anchor rod (1), and a nut (8) is provided on the side of the grout stopper (7) away from the anchor head (3), and the nut (8) is connected to the anchor rod (1) through threaded engagement.

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