An expandable recyclable anchor rod and its use method

Abstract

The present invention relates to an expandable recyclable anchor rod and a method for using the same, and belongs to the field of anchor rod technology. The expandable recyclable anchor rod comprises a hollow expansion rod and a rotary extrusion rod, a plurality of expansion plates are installed at the front end of the expansion rod, and a support rod is rotatably connected to the inner wall of each expansion plate. The end of each support rod away from the corresponding expansion plate is rotatably connected to the pressure button, a first spring is installed in the middle of each support rod, and the end of each first spring away from the corresponding support rod is connected to a metal ball; a plurality of holes are provided on the expansion rod, a plurality of telescopic rods are installed on the inner wall of the expansion rod, and the other end of each expansion rod is connected to the inner wall of the expansion rod through a plurality of second springs, and a cone block matching the hole is provided on the inner side of each telescopic rod, and a wedge-shaped cone is provided on the rotary extrusion rod. The present invention does not require grouting during construction, is convenient for recovery, greatly improves construction efficiency, and saves costs.

Description

Technical Field

[0001] The invention relates to an expandable recyclable anchor rod and a use method thereof, belonging to the technical field of anchor rods. Background Art

[0002] Anchor rods are one of the most commonly used components in geotechnical engineering. In recent years, with the large-scale construction of engineering projects, thousands of foundation pits have been added every year in China. Anchor rods are widely used in foundation pit support projects. However, these anchor rods are temporary and are left underground for a long time after the project is completed. This brings some problems: (1) The metal anchor rods left underground cannot be recovered, causing environmental pollution; (2) They may hinder the construction of other surrounding buildings or cause inconvenience to the subsequent development of underground space.

[0003] The emergence of recyclable anchor technology has effectively solved the problems caused by conventional anchors, continuing the advantages of anchor support and becoming a green building technology. However, there are still some shortcomings in the current recyclable anchor technology: (1) Most anchors still require grouting, which is a cumbersome construction process; (2) The recycling method is relatively complicated, increasing construction costs; (3) It is impossible to achieve complete recycling, and some rods are still left in the soil, causing environmental pollution.

[0004] The information disclosed in this background section is only intended to enhance understanding of the overall background of the invention and should not be considered as an admission or any form of suggestion that the information constitutes the prior art already known to a person of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an expandable recyclable anchor rod and a method for using the same, so as to solve the technical problems in the related art that the anchor rod still needs to be grouted, the recovery is complicated and cannot be completely recovered.

[0006] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0007] On the one hand, the present invention provides an expandable recyclable anchor rod, comprising a hollow expansion rod and a rotary extrusion rod, wherein a plurality of expansion plates are installed at the front end of the expansion rod, and a support rod is rotatably connected to the inner wall of each expansion plate, and the end of each support rod away from the corresponding expansion plate is rotatably connected to a pressure button, and a first spring is installed in the middle of each support rod, and the end of each first spring away from the corresponding support rod is connected to a metal ball;

[0008] The expansion rod is provided with multiple holes, and multiple telescopic rods are installed on the inner wall of the expansion rod. The other end of each expansion rod is connected to the inner wall of the expansion rod through multiple second springs. A cone block matching the hole is provided on the inner side of each telescopic rod, and a wedge-shaped cone is provided on the rotating extrusion rod.

[0009] Furthermore, an internal thread is provided on the inner wall of the tail end of the expansion rod, and an external thread matching the internal thread is provided on the rotary extrusion rod.

[0010] Furthermore, the length of the internal thread is greater than the length of the external thread.

[0011] Furthermore, the length of the internal thread is less than or equal to the length of the support rod.

[0012] Furthermore, a hexagonal screw head is installed at the tail end of the rotating extrusion rod.

[0013] Furthermore, the diameter of the large circle at the front end of the wedge-shaped cone is smaller than the inner diameter of the expansion rod.

[0014] In another aspect, the present invention provides a method for using an expandable retrievable anchor rod, comprising:

[0015] During construction, holes are drilled at the locations where the soil needs to be anchored, and the anchor rods in the retracted state are fixed in the soil.

[0016] Twist the hexagonal screw clockwise, rotate the extrusion rod forward, and the wedge-shaped cone pushes the telescopic rod and causes the cone to penetrate into the soil;

[0017] At the same time, the front end of the extrusion rod is rotated to push the pressure platform forward, causing the support rod to rotate and open the expansion plate, so that the expansion plate squeezes the soil to achieve anchoring.

[0018] Furthermore, it also includes:

[0019] When retrieving, turn the hexagonal screw counterclockwise to rotate the extrusion rod backward. The telescopic rod retracts the cone block into the rod body under the pressure of the second spring, and the support rod retracts the expansion plate under the tension of the first spring.

[0020] When the cone block and expansion plate are separated from the soil, the anchor rod is taken out to complete the recovery.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention does not require grouting during construction, has a simple construction process, is easy to recycle, greatly improves construction efficiency, saves costs, and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of an expandable recyclable anchor provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of an expansion rod provided by an embodiment of the present invention;

[0025] Figure 3is a structural schematic diagram of a rotating extrusion rod provided by an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional view of a telescopic rod provided by an embodiment of the present invention;

[0027] Figure 5 is a cross-sectional view of a support rod provided by an embodiment of the present invention;

[0028] Figure 6 1 is a schematic structural diagram of a first spring and a metal ball provided in an embodiment of the present invention;

[0029] In the figure: 1: expansion rod; 2: rotating extrusion rod; 3: expansion plate; 4: support rod; 5: pressure button; 6: first spring; 7: metal ball; 8: hole; 9: telescopic rod; 10: second spring; 11: cone block; 12: internal thread; 13: wedge-shaped cone; 14: hexagonal screw head; 15: external thread. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] Example 1:

[0034] like Figures 1 to 6 As shown, this embodiment provides an expandable recyclable anchor rod, including a hollow expansion rod 1 and a rotary extrusion rod 2 , wherein the rotary extrusion rod 2 is arranged inside the expansion rod 1 .

[0035] Specifically, an internal thread 12 is provided on the inner wall of the tail end of the expansion rod 1, and an external thread 15 matching the internal thread 12 is provided on the rotating extrusion rod 2. Preferably, in order to prevent the rotating extrusion rod 2 from rotating too much, resulting in thread dislocation and the anchor rod cannot be recovered, the length of the internal thread 12 is greater than the length of the external thread 15.

[0036] In this embodiment, a plurality of expansion plates 3 are installed at the front end of the expansion rod 1, and a support rod 4 is rotatably connected to the inner wall of each expansion plate 3, and one end of each support rod 4 away from the corresponding expansion plate 3 is rotatably connected to the pressure button 5.

[0037] Specifically, in order to allow the support rod 4 to rotate freely, the two ends of the support rod 4 are hinged to the inner wall of the expansion plate 3 and the pressure button 5 respectively.

[0038] In this embodiment, a first spring 6 is installed in the middle of each support rod 4 , and one end of each first spring 6 away from the corresponding support rod 4 is connected to a metal ball 7 .

[0039] In this embodiment, a plurality of holes 8 are provided on the expansion rod 1, and a plurality of telescopic rods 9 are installed on the inner wall of the expansion rod 1. The other end of each expansion rod 1 is connected to the inner wall of the expansion rod 1 through a plurality of second springs 10. A cone block 11 matching the hole is provided on the inner side of each telescopic rod 9, and a wedge-shaped cone 13 is provided on the rotating extrusion rod 2.

[0040] Specifically, the diameter of the large circle at the front end of the wedge-shaped cone 13 is smaller than the inner diameter of the expansion rod 1. In order to allow the cone block 11 to be inserted into the soil as much as possible, preferably, the diameter of the large circle at the front end of the wedge-shaped cone 13 is slightly smaller than the inner diameter of the expansion rod 1.

[0041] In order for the telescopic rod to work properly, the telescopic rod 9 has a certain elasticity and the cone block 11 has sufficient strength.

[0042] The number and size of the holes 8 match the number and size of the cone blocks 11 . Under the action of tension or thrust, each cone block 11 can be retracted into the expansion rod 1 or extended out of the expansion rod 1 .

[0043] In this embodiment, in order to limit the maximum expansion angle of the support rod 4 , the length of the internal thread 12 is less than or equal to the length of the support rod 4 .

[0044] In this embodiment, a hexagonal screw head 14 is installed at the tail end of the rotating extrusion rod 2 . The length of the rotating extrusion rod 2 extending into the interior of the expansion rod 1 can be controlled by screwing the hexagonal screw head 14 with a wrench.

[0045] Example 2:

[0046] This embodiment provides a method for using an expandable retrievable anchor rod, comprising:

[0047] When not in use, the anchor rod is in a retracted state. Before using the present invention for anchoring, first drill a hole at the position where the soil needs to be anchored, then fix the anchor rod in the retracted state in the soil, and then use a wrench to screw the hexagonal nut 14 clockwise. At this time, the rotating extrusion rod 2 will move forward. As the rotating extrusion rod 2 moves, the wedge-shaped cone 13 will push the telescopic rod 9 and make the cone block 11 penetrate into the soil. At the same time, the front end of the rotating extrusion rod 2 will push the pressure platform 5 forward, and then the support rod 4 rotates and opens the expansion plate 3, so that the expansion plate 3 squeezes the soil to achieve the anchoring effect.

[0048] When it is necessary to recycle, just use a wrench to turn the hexagonal screw 14 counterclockwise. At this time, the rotating extrusion rod 2 will move backward, and the telescopic rod 9 will retract the cone block 11 into the rod body under the pressure of the second spring 10. At the same time, the support rod 4 will also retract the expansion plate 3 under the tension of the first spring 6. When the two are separated from the soil, the anchor rod can be taken out to complete the recovery.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An expandable recyclable anchor bolt, characterized in that: It comprises a hollow expansion rod (1) and a rotating extrusion rod (2), wherein a plurality of expansion plates (3) are installed at the front end of the expansion rod (1), and a support rod (4) is rotatably connected to the inner wall of each expansion plate (3), and an end of each support rod (4) away from the corresponding expansion plate (3) is rotatably connected to a pressure button (5), and a first spring (6) is installed in the middle of each support rod (4), and an end of each first spring (6) away from the corresponding support rod (4) is connected to a metal ball (7); The expansion rod (1) is provided with a plurality of holes (8), and a plurality of telescopic rods (9) are installed on the inner wall of the expansion rod (1). The other end of each telescopic rod (9) is connected to the inner wall of the expansion rod (1) via a plurality of second springs (10). A cone block (11) matching the hole is provided on the inner side of each telescopic rod (9), and a wedge-shaped cone (13) is provided on the rotating extrusion rod (2); An internal thread (12) is provided on the inner wall of the tail end of the expansion rod (1), and an external thread (15) matching the internal thread (12) is provided on the rotary extrusion rod (2); The length of the internal thread (12) is greater than the length of the external thread (15); The length of the internal thread (12) is less than or equal to the length of the support rod (4).

2. The expandable retrievable anchor bolt according to claim 1, characterized in that: A hexagonal screw head (14) is installed at the tail end of the rotating extrusion rod (2).

3. The expandable retrievable anchor bolt according to claim 1, characterized in that: The diameter of the large circle at the front end of the wedge-shaped cone (13) is smaller than the inner diameter of the expansion rod (1).

4. A method for using the expandable recyclable anchor according to claim 2, characterized in that: include: During construction, holes are drilled at the locations where the soil needs to be anchored, and the anchor rods in the retracted state are fixed in the soil. Twist the hexagonal screw clockwise, rotate the extrusion rod forward, and the wedge-shaped cone pushes the telescopic rod and causes the cone to penetrate into the soil; At the same time, the front end of the extrusion rod is rotated to push the pressure button forward, and the support rod rotates and opens the expansion plate, so that the expansion plate squeezes the soil to achieve anchoring.

5. The method for using the expandable recyclable anchor according to claim 4, characterized in that: Also includes: When retrieving, turn the hexagonal screw counterclockwise to rotate the extrusion rod backward. The telescopic rod retracts the cone block into the rod body under the pressure of the second spring, and the support rod retracts the expansion plate under the tension of the first spring. When the cone block and expansion plate are separated from the soil, the anchor rod is removed to complete the recovery.

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