A centering and limiting device for slope elbow anchor rod construction and its construction method

Abstract

The present invention discloses a centering and limiting device for slope elbow anchor construction, comprising: a centering device, the bottom of which is detachably connected with a centering device shoe; an upper bracket, which includes a clamping ring and a plurality of telescopic legs; the diameter of the clamping ring is adjustable, one end of any of the telescopic legs is hinged to the clamping ring, and the other end is hinged to the upper end surface of the centering device; a lower bracket, which includes a centering ring with an inner diameter matching the diameter of the anchor rod and a plurality of fixed legs; the lower bracket is arranged inside the centering device shoe, one end of any of the fixed legs is fixedly connected to the outer wall of the centering ring, and the other end is fixedly connected to the inner wall of the centering device shoe; the centering device, the centering device shoe, the clamping ring and the centering ring are all coaxially arranged. The present invention can ensure that the anchor rod is located at the center of the anchor hole during installation, and can flexibly adjust the height of the anchor rod to meet the requirements, ensuring the anchoring force of the anchor rod after grouting.

Description

Technical Field

[0001] The present invention relates to the field of slope anchor centering devices. More specifically, the present invention relates to a slope elbow anchor construction centering and limiting device and its construction method. Background Art

[0002] During the construction process of anchor bolts in engineering slopes, the anchor holes are first drilled, and then subsequent processes such as anchor bolt installation are carried out. Due to reasons such as the slope soil properties and the experience of the drilling rig operator during the drilling of the anchor holes, there are certain differences between the depth, diameter, etc. of the formed anchor holes and the design scheme. When installing the anchor bolt, due to the action of gravity, it will insert into the bottom of the hole by a certain part. In the prior art, only the anchor bolt elbow is used to hold the hole opening to limit the downward movement of the anchor bolt, resulting in the height of the anchor bolt not conforming to the design height and being unable to be clamped into the grid beam steel bars; without limiting measures, the anchor bolt is prone to the rod body clinging to the hole wall under the action of gravity, resulting in a relatively thin protective layer and a large loss of anchoring force. The traditional method uses ear-shaped positioning steel bars welded to the anchor bolt to ensure the centering of the anchor bolt. However, for slopes with poor formation properties, the positioning steel bars are too thin and are easily displaced downward under the action of gravity and get stuck in the hole wall soil layer, unable to achieve the centering and limiting effect. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0004] To achieve these objects and other advantages in accordance with the present invention, there is provided a slope elbow anchor construction centering and limiting device, including:

[0005] A centering device, which is a hollow frustum-shaped structure; the bottom of the centering device is detachably connected with a centering device boot, and the centering device boot is a hollow cylindrical structure;

[0006] An upper bracket, which includes a clamping ring and a plurality of telescopic legs; the diameter of the clamping ring is adjustable, one end of any of the telescopic legs is hinged to the clamping ring, and the other end is hinged to the upper end surface of the centering device; by adjusting the lengths of the telescopic legs, the distance between the clamping ring and the centering device can be adjusted;

[0007] A lower bracket, which includes a centering ring with an inner diameter matching the diameter of the anchor bolt and a plurality of fixed legs; the lower bracket is arranged inside the centering device boot, and the plurality of fixed legs are evenly distributed along the outer periphery of the centering ring. One end of any of the fixed legs is fixedly connected to the outer wall of the centering ring, and the other end is fixedly connected to the inner wall of the centering device boot;

[0008] The centering device, the centering device boot, the clamping ring, and the centering ring are all coaxially arranged.

[0009] Preferably, the telescopic support leg includes an outer sleeve and an inner rod. One end of the inner rod extends into the outer sleeve and is threadedly connected to the outer sleeve; a length mark is provided on the inner rod.

[0010] Preferably, a cutting edge is provided at the bottom of the centering shoe.

[0011] Preferably, the clamping ring includes a thin-walled steel strip, a hoop shell and a screw. The hoop shell is fixedly connected to the fixed end of the thin-walled steel strip. A plurality of engaging grooves matching with the screw are spaced along the length direction at the movable end of the thin-walled steel strip; an insertion opening and an outlet through which the thin-walled steel strip can pass are respectively provided at both ends of the hoop shell, and the screw is rotatably arranged inside the hoop shell; after the movable end of the thin-walled steel strip extends into the hoop shell, the screw is rotated to engage with the movable end of the thin-walled steel strip.

[0012] Preferably, a rubber pad is provided on the inner wall of the clamping ring.

[0013] Preferably, the centering device includes a plurality of centering blocks, and the plurality of centering blocks are spliced end to end in sequence to form the centering device.

[0014] Preferably, it further includes a steel casing. The diameter of the steel casing is the same as the diameter of the anchor hole of the anchor rod and is coaxially arranged with the centering ring; the top of the steel casing is fixedly connected to each of the fixed support legs.

[0015] Another object of the present invention is to provide a construction method of a centering and limiting device for a slope elbow anchor rod construction, including the following steps:

[0016] S1. After the anchor hole is drilled, place the centering shoe, insert the steel casing into the anchor hole, and align the center of the centering ring with the center of the anchor hole; then insert the anchor rod into the centering ring.

[0017] S2. Splice the centering device and connect the centering device to the centering shoe.

[0018] S3. Pass the clamping ring through the anchor rod and clamp the anchor rod; then respectively hinge each telescopic support leg to the upper end surfaces of the clamping ring and the centering device.

[0019] S4. Adjust the lengths on each telescopic support leg to adjust the anchor rod to the designed height.

[0020] Preferably, in step S1, the part of the end of the anchor rod outside the anchor hole that extends out of the clamped ring is bent to 90°.

[0021] Preferably, in step S4, adjust the height of the anchor rod according to the distance between the bent part of the anchor rod and the orifice of the anchor hole.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. For the centering and limiting device for the construction of slope elbow anchor bolts provided by the present invention, the anchor bolt is centered and limited through the combined action of the upper support and the lower support, ensuring that the anchor bolt is located at the center of the anchor hole; by adjusting the lengths of the telescopic legs in the upper support, the distance between the clamping ring and the centering device is adjusted, thereby realizing the adjustment of the height of the anchor bolt.

[0024] 2. For the centering and limiting device for the construction of slope elbow anchor bolts provided by the present invention, the centering device is formed by splicing a plurality of centering device blocks, which can be applicable to the centering and limiting of elbow anchor bolts; and a cutting edge is provided at the bottom of the centering device boot, which can improve the stability of the whole device.

[0025] 3. The construction method of the centering and limiting device for the construction of slope elbow anchor bolts provided by the present invention can ensure that the anchor bolt is located at the center of the anchor hole during installation, and can flexibly adjust the height of the anchor bolt to meet the requirement of being clamped into the grid beam steel bars, ensuring the anchoring force of the anchor bolt after grouting.

[0026] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic side structure diagram of the centering and limiting device for the construction of slope elbow anchor bolts in an embodiment of the present invention;

[0028] Figure 2 It is a schematic structure diagram of the lower support in the above embodiment of the present invention;

[0029] Figure 3 It is a schematic structure diagram of the clamping ring in the above embodiment of the present invention;

[0030] Figure 4 It is a schematic structure diagram of the telescopic leg in the above embodiment of the present invention;

[0031] Figure 5 It is a schematic structure diagram of the cutting edge in the above embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0032] The following further describes the present invention in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0033] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation schemes are all conventional methods, and the reagents and materials, unless otherwise specified, can all be obtained from commercial channels; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 should not be construed as a limitation to the present invention.

[0034] As Figures 1 to 5 shown, the present invention provides a centering and limiting device for slope elbow anchor construction, including:

[0035] A centering device 1, which is a hollow frustum-shaped structure; a centering device shoe 2 is detachably connected to the bottom of the centering device 1, and the centering device shoe 2 is a hollow cylindrical structure;

[0036] An upper bracket 6, which includes a clamping ring 61 and a plurality of telescopic legs 62; the diameter of the clamping ring 61 is adjustable, one end of any of the telescopic legs 62 is hinged to the clamping ring 61, and the other end is hinged to the upper end surface of the centering device 1; the lengths of the telescopic legs 62 are adjusted to adjust the distance between the clamping ring 61 and the centering device 1;

[0037] A lower bracket 7, which includes a centering ring 71 with an inner diameter matching the diameter of the anchor rod 4 and a plurality of fixed legs 72; the lower bracket is arranged inside the centering device shoe 2, and the plurality of fixed legs 72 are evenly distributed along the outer periphery of the centering ring 71, one end of any of the fixed legs 72 is fixedly connected to the outer wall of the centering ring 71, and the other end is fixedly connected to the inner wall of the centering device shoe 2;

[0038] The centering device 1, the centering device shoe 2, the clamping ring 61 and the centering ring 72 are all coaxially arranged.

[0039] In this technical solution, the centering device 1 is a hollow frustum-shaped structure so that the centering device 1 can be stably placed on the slope. During actual use, the diameter of the centering device shoe 2 can be the same as the bottom diameter of the centering device 1, and the two can be connected by threads. The lower bracket 7 is arranged in the centering device shoe 2. During use, first place the centering device shoe 2 on the slope and align the center of the centering ring 71 with the center of the anchor hole of the anchor rod 4, and then insert the anchor rod 4 into the centering ring 71 to preliminarily center the anchor rod 4 through the centering ring 71. Preferably, a rubber pad can be arranged on the inner wall of the centering ring 71 to increase the friction between the centering ring 71 and the anchor rod 4, thereby preliminarily limiting the anchor rod 4. Then install the upper bracket 6 above the centering device 1, adjust the diameter of the clamping ring 61 to clamp the anchor rod 4; and adjust the distance between the clamping ring 61 and the upper end face of the centering device 1 by adjusting the length of each telescopic leg 62, that is, adjust the height of the anchor rod 4, limit the downward movement of the anchor rod 4, and make the height of the anchor rod 4 meet the setting requirements. Then insert the grouting pipe into the anchor hole through the centering device 1 and the centering device shoe 2 for grouting, and remove the slope elbow anchor rod construction centering and limiting device after the strength of the grout 5 reaches the requirements.

[0040] In another embodiment, the telescopic leg 62 includes an outer sleeve 621 and an inner rod 622. One end of the inner rod 622 extends into the outer sleeve 621 and is threadedly connected to the outer sleeve 621; a length mark 623 is arranged on the inner rod 622. The length of the telescopic leg 62 is adjusted by adjusting the length of the inner rod 622 extending into the outer sleeve 621. The length of the telescopic leg 62 can be quickly judged through the length mark 623, and then the setting height of the anchor rod 4 can be calculated. At the same time, it is convenient to set each telescopic leg 62 to the same length, so that the clamping ring 61 is parallel to the upper end face of the centering device 1.

[0041] In another embodiment, a cutting edge 21 is arranged at the bottom of the centering device shoe 2. Specifically, the cutting edge 21 is arranged in a circle along the bottom of the centering device shoe 2. The cross-sectional shape of the cutting edge 21 is a right triangle, and its inclined surface faces the center of the centering device shoe 2. When the center of the centering device shoe 2 moves to be on the same straight line as the center of the anchor hole, insert the cutting edge 21 into the slope to fix the centering device shoe 2 and the centering device 1. The cutting edge 21 can be an integrally formed structure with the centering device shoe 2.

[0042] In another embodiment, the clamping ring 61 includes a thin-walled steel strip 611, a hoop shell 613, and a screw rod 612. The hoop shell 613 is fixedly connected to the fixed end of the thin-walled steel strip 611. A plurality of engagement grooves cooperating with the screw rod 612 are spaced along the length direction at the movable end of the thin-walled steel strip 611. At both ends of the hoop shell 613, an insertion port and an exit port through which the thin-walled steel strip 611 can pass are respectively provided. The screw rod 612 is rotatably arranged inside the hoop shell 613. After the movable end of the thin-walled steel strip 611 extends into the hoop shell 613, the screw rod 612 is rotated to engage the screw rod 612 with the movable end of the thin-walled steel strip 611.

[0043] In this technical solution, the movable end of the thin-walled steel strip 611 is inserted into the hoop shell 613 from the insertion port to form the clamping ring 61. The diameter of the clamping ring 61 is adjusted by adjusting the length of the movable end of the thin-walled steel strip 611 extending out of the exit port of the hoop shell 613 to clamp the anchor rod 4. Then the screw rod 612 is rotated to engage the thread of the screw rod 612 with the corresponding engagement groove to fix the thin-walled steel strip 611, realizing the clamping of the anchor rod 4.

[0044] In another embodiment, a rubber pad is provided on the inner wall of the thin-walled steel strip 611. The friction between the clamping ring 61 and the anchor rod 4 is increased through the rubber pad, enabling the clamping ring 61 to clamp the anchor rod 4 more stably.

[0045] In another embodiment, the centering device 1 includes a plurality of centering blocks, and the plurality of centering blocks are sequentially spliced end to end to form the centering device 1. Specifically, the adjacent two centering blocks are detachably connected, such as tenon and mortise connection. To facilitate observing whether the center of the centering ring 71 is aligned with the center of the anchor hole, after the centering device shoe 2 is positioned, the centering device 1 is spliced.

[0046] In another embodiment, a steel casing 3 is further included. The diameter of the steel casing 3 is the same as the diameter of the anchor hole of the anchor rod 4 and is coaxially arranged with the centering ring 71. The upper end surfaces of the steel casing 3 are fixedly connected to the respective fixed legs 61. When moving the centering device shoe 2, first insert the steel casing 3 into the anchor hole to assist in positioning the centering device shoe 2.

[0047] The present invention also provides a construction method using the slope elbow anchor rod construction centering and limiting device, including the following steps:

[0048] S1. After the anchor hole is drilled, place the centering device shoe 2, insert the steel casing 3 into the anchor hole, and align the center of the centering ring 71 with the center of the anchor hole; then insert the anchor rod 4 into the centering ring 71;

[0049] S2. Assemble the centering device 1 and connect the centering device 1 to the centering device shoe 2;

[0050] S3. Pass the clamping ring 61 through the anchor rod 4 and clamp the anchor rod 4; then respectively hinge each telescopic leg 62 to the clamping ring 61 and the upper end face of the centering device 1;

[0051] S4. Adjust the lengths of the telescopic legs 62 to adjust the anchor rod 4 to the designed height.

[0052] In this technical solution, in step S1, the steel casing 3 is used to assist in preliminary centering. After the center of the centering ring 71 is aligned with the center of the anchor hole, it is fixed by inserting the cutter foot 21 into the slope. Further, in step S1, the part of the anchor rod 4 that extends out of the clamping ring 61 at one end outside the anchor hole is bent to 90°. In order to make the anchor rod 4 better stuck in the lattice beam steel bars on the slope and improve the overall stress effect, the end of the anchor rod 4 is bent.

[0053] In step S2, when assembling the centering device 1, the anchor rod 4 is preliminarily centered and supported by the centering ring 71. In step S3, after the movable end of the thin-walled steel strip 611 bypasses the anchor rod 4 and is inserted into the hoop shell 613, adjust the diameter of the clamping ring 61 to clamp the anchor rod 4, and then rotate the screw 612 for fixation. Then install each telescopic leg 62.

[0054] Further, in step S4, adjust the height of the anchor rod according to the distance between the bent part of the anchor rod 4 and the orifice of the anchor hole. Specifically, the distance between the bent part of the anchor rod 4 and the orifice of the anchor hole is H, and it is calculated by the following formula:

[0055]

[0056] In the formula, h1 is the height of the centering device 1, h2 is the height of the centering device shoe 2 above the slope surface, L is the length of the telescopic leg 62, and D is the radius of the upper end face of the centering device 1. By adjusting the lengths of the telescopic legs 62, the distance between the bent part of the anchor rod 4 and the orifice of the anchor hole can be quickly and conveniently adjusted. Combining the length of the anchor rod 4 and the depth of the anchor hole, it can be judged the depth of the anchor rod 4 inserted into the anchor hole and whether it is inserted into the soil layer, and then the height of the anchor rod 4 can be accurately adjusted to the designed height.

[0057] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A centering and limiting device for the construction of slope elbow anchor bolts, characterized in that Comprising: An aligner, which is a hollow frustum-shaped structure; a boot of the aligner is detachably connected to the bottom of the aligner, and the boot of the aligner is a hollow cylindrical structure; An upper bracket, which includes a clamping ring and a plurality of telescopic legs; the diameter of the clamping ring is adjustable, one end of any of the telescopic legs is hinged to the clamping ring, and the other end is hinged to the upper end surface of the aligner; the lengths of the telescopic legs are adjusted to adjust the distance between the clamping ring and the aligner; A lower bracket, which includes an aligning ring with an inner diameter matching the diameter of the anchor rod and a plurality of fixed legs; the lower bracket is arranged inside the boot of the aligner, and the plurality of fixed legs are evenly distributed along the outer circumference of the aligning ring. One end of any of the fixed legs is fixedly connected to the outer wall of the aligning ring, and the other end is fixedly connected to the inner wall of the boot of the aligner; The aligner, the boot of the aligner, the clamping ring and the aligning ring are all coaxially arranged.

2. The centering and limiting device for the construction of slope elbow anchor bolts according to claim 1, characterized in that, The telescopic leg includes an outer sleeve and an inner rod. One end of the inner rod extends into the outer sleeve and is threadedly connected to the outer sleeve; a length mark is arranged on the inner rod.

3. The centering and limiting device for the construction of slope elbow anchor bolts as described in claim 1, characterized in that, A cutting edge is arranged at the bottom of the boot of the aligner.

4. The centering and limiting device for slope elbow anchor rod construction according to claim 1, characterized in that, The clamping ring includes a thin-walled steel strip, a hoop shell and a screw rod. The hoop shell is fixedly connected to the fixed end of the thin-walled steel strip. A plurality of meshing grooves matching the screw rod are arranged at intervals along the length direction of the movable end of the thin-walled steel strip; an insertion port and an outlet port for the thin-walled steel strip to pass through are respectively arranged at both ends of the hoop shell, and the screw rod is rotatably arranged inside the hoop shell; after the movable end of the thin-walled steel strip extends into the hoop shell, the screw rod is rotated to mesh the screw rod with the movable end of the thin-walled steel strip.

5. The centering and limiting device for slope elbow anchor rod construction according to claim 4, characterized in that, A rubber pad is arranged on the inner wall of the clamping ring.

6. The centering and limiting device for slope elbow anchor rod construction according to claim 1, characterized in that, The aligner includes a plurality of aligner blocks, and the plurality of aligner blocks are sequentially spliced end to end to form the aligner.

7. The centering and limiting device for slope elbow anchor rod construction according to claim 1, characterized in that, It further includes a steel casing, the diameter of the steel casing is the same as the diameter of the anchor hole of the anchor rod, and it is coaxially arranged with the aligning ring; the top of the steel casing is fixedly connected to each of the fixed legs.

8. The construction method using the slope elbow anchor rod construction centering and limiting device according to any one of claims 1 to 7, characterized in that, Including the following steps: S1. After the anchor hole is drilled, place the boot of the aligner, insert the steel casing into the anchor hole, and align the center of the aligning ring with the center of the anchor hole; then insert the anchor rod into the aligning ring; S2. Splice the aligner and connect the aligner to the boot of the aligner; S3. Pass the clamping ring through the anchor rod and clamp the anchor rod; then respectively hinge each telescopic leg to the clamping ring and the upper end surface of the aligner; S4. Adjust the lengths on each telescopic leg to adjust the anchor rod to the designed height.

9. The construction method of the centering and limiting device for slope elbow anchor rod construction according to claim 8, characterized in that, In step S1, the part of the end of the anchor rod outside the anchor hole that extends out of the clamped ring is bent to 90°.

10. The construction method of the centering and limiting device for the slope elbow anchor rod construction according to claim 9, characterized in that, In step S4, adjust the height of the anchor rod according to the distance between the bent part of the anchor rod and the orifice of the anchor hole.

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