Centering and fixing device for mounting anchor rod on deep and thick covering layer

Abstract

The utility model discloses a centering and fixing device for installation of a deep and thick covering layer anchor rod. The centering and fixing device comprises an anchor rod body, sleeves welded to the anchor rod at intervals and centering mechanisms connected to the sleeves. Connecting threads are arranged at the two ends of the sleeve, and a clamping connecting protrusion is arranged in the middle of the sleeve. The centering mechanism comprises a base support connected to the sleeve, an expansion support connected to the base support and retaining rings abutting against the two ends of the base support, and the retaining rings are connected to the connecting threads at the two ends of the sleeve respectively. According to the utility model, the base is arranged on the anchor rod, and the centering fixing device is connected through the base, so that the position of the centering fixing device can be adjusted, and the economic cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of infrastructure construction technology, specifically relating to a centering and fixing device for anchor bolt installation in deep overburden layers. Background Technology

[0002] Thick overburden generally refers to substantial Quaternary loose deposits formed under various geological processes. These overburdens are typically quite thick, ranging from tens to hundreds of meters, and are characterized by coarse grains, high permeability, discontinuity between strata, and a loose structure, resulting in significant variations in their physical properties across different directions. This leads to poor physical properties and low bearing capacity. Under the influence of reservoir impoundment and dam loads, the overburden may subside or experience uneven subsidence. This could potentially cause dam deformation, cracking, or even collapse.

[0003] In existing technologies, to prevent settlement accidents, it is necessary to reinforce the foundation of thick overburden layers to improve their bearing capacity and stability. A common reinforcement method is anchor bolt grouting, a simple and effective support structure. However, due to the considerable thickness of the overburden layer, it is crucial to ensure that the anchor bolts do not shift during the grouting process to guarantee their accurate positioning and achieve the designed effect.

[0004] To solve this problem, centering supports are needed to keep the anchor rods stable during grouting. Common centering and fixing devices are usually made of steel bars, welded to the outside of the anchor rod body, and set at certain intervals along the rod body. The entire structure is fixed by welding, so its structure is relatively fixed and has poor adjustability. Utility Model Content

[0005] The purpose of this utility model is to provide a centering and fixing device for anchor bolts with thick overburden. By setting a base on the anchor bolt and then connecting the centering and fixing device through the base, the position of the centering and fixing device can be adjusted, thus saving economic costs.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A centering and fixing device for anchor bolt installation in a deep overburden layer includes an anchor bolt body, sleeves welded at intervals to the anchor bolt, and a centering mechanism connected to the sleeves; the sleeves are provided with connecting threads at both ends and a snap-fit ​​connecting protrusion in the middle of the sleeves; the centering mechanism includes a base bracket connected to the sleeves, an extension bracket connected to the base bracket, and anti-reverse rings abutting against both ends of the base brackets, and the anti-reverse rings are respectively connected to the connecting threads at both ends of the sleeves.

[0008] Furthermore, the base bracket includes a connecting part and a bracket part, wherein the connecting part is provided with a snap-fit ​​recess, and the size of the snap-fit ​​recess is adapted to the size of the snap-fit ​​connecting protrusion.

[0009] Furthermore, the bracket portion is disposed on the connecting portion, and the bracket portion includes at least one base rod, while the extension bracket includes multiple reinforcing support ribs connected between the base rod and the connecting portion.

[0010] Furthermore, the bottom rod is inclinedly connected to the connecting part.

[0011] Furthermore, multiple reinforcing support ribs are connected to different positions on the base rod.

[0012] Furthermore, a pressure ring is provided between the anti-reverse ring and the base bracket.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: This utility model has a simple structure and is easy to implement. It uses multiple welded and fixed sleeves spaced apart on the anchor rod body, and then connects these sleeves to fix the centering support structure. Firstly, compared to the traditional method of directly welding the centering support to the anchor rod, this allows for adjustments to the installation position and type of the centering support to meet different needs, providing good adjustability. Secondly, when the centering support is under stress, the force is no longer directly applied to the weld points, resulting in a more stable structure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the anchor bolt installation centering and fixing device with a thick overburden layer provided by this utility model.

[0016] Figure 2 This is a schematic diagram of the sleeve structure of the deep overburden anchor bolt installation centering and fixing device provided by this utility model.

[0017] Figure label:

[0018] 1. Anchor bolt body; 2. Sleeve; 3. Connecting thread; 4. Base rod; 5. Reinforcing support rib; 6. Anti-reverse ring; 7. Pressure ring; 8. Snap-fit ​​connecting protrusion; 9. Base bracket. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] like Figures 1-2As shown, a centering and fixing device for installing anchor bolts in deep overburden layers includes an anchor bolt body 1, sleeves 2 welded to the anchor bolt at intervals, and a centering mechanism connected to the sleeves 2; the sleeves 2 are provided with connecting threads 3 at both ends and a snap-fit ​​connecting protrusion 8 in the middle of the sleeves 2; the centering mechanism includes a base bracket 9 connected to the sleeves 2, an extension bracket connected to the base bracket 9, and anti-reverse rings 6 abutting against both ends of the base bracket 9, and the anti-reverse rings 6 are respectively connected to the connecting threads 3 at both ends of the sleeves 2.

[0027] Compared to existing technologies, the installation process for anchor bolts typically includes drilling, hole cleaning, installation of the anchor bolt centering and fixing device, and grouting. The centering and fixing device is mainly used to ensure the accurate position of the anchor bolt in the hole and prevent it from shifting or tilting. Common centering and fixing devices are usually made of steel bars, welded to the outside of the anchor bolt body, and set at certain intervals along the bolt body. During the grouting process, especially in deep strata, the centering device will bear a large force due to factors such as grouting pressure, which can easily lead to damage and shifting, thus causing the anchor bolt to fail to achieve the intended effect. In this utility model, a sleeve 2 is first set on the anchor bolt body 1, and then the anti-reverse ring 6 is connected to the sleeve 2 by setting a connecting thread 3 to fix the base bracket 9. On the one hand, the sleeve 2 can be pre-supported when the anchor bolt is supported in the factory. On the field, the number and connection position of the centering mechanism can be adjusted at different intervals according to different usage environments, making the overall connection method more flexible. On the other hand, the force direction of the support is more reasonable during the grouting process, avoiding the problem that the welding points are not stable enough and are easily damaged by the force.

[0028] Specifically, in this invention, the base bracket 9 includes a connecting part and a bracket part. The connecting part has a snap-fit ​​recess, the size of which is adapted to the size of the snap-fit ​​connecting protrusion 8. The bracket part is disposed on the connecting part and includes at least one base rod 4. The extension bracket includes multiple reinforcing support ribs 5 connected between the base rod 4 and the connecting part. The base bracket 9 is used to connect the sleeve 2, and the connecting protrusion on the sleeve 2 prevents the sleeve 2 and the base bracket 9 from rotating. The anti-reverse ring 6 is used to fix the base bracket 9 axially, thereby preventing the base bracket 9 from sliding.

[0029] The base rod 4 is inclinedly connected to the connecting part. Multiple reinforcing support ribs are connected to different positions on the base rod 4.

[0030] A pressure ring 7 is provided between the anti-reverse ring 6 and the base bracket 9.

[0031] In practical use, the system can be prefabricated in the factory by welding multiple sleeves 2 at equal intervals. Each sleeve 2 has connecting threads 3 at both ends to connect to anti-reverse rings 6. A raised strip block is installed in the middle of the sleeve 2 as a snap-fit ​​connecting protrusion 8 to connect to the base bracket 9. Factory prefabrication saves on-site processing time, reduces on-site welding time, and effectively improves construction efficiency. Furthermore, according to specific needs, such as intervals of 2000mm, alignment mechanisms can be connected. Each alignment mechanism first connects the bottom anti-reverse ring 6 to the appropriate position, then aligns the base bracket 9 with the raised strip block for connection, and finally connects the upper anti-reverse ring 6. The base bracket 9 is then securely fixed by the two anti-reverse rings 6.

[0032] The overall structure of this utility model is simple and the connection operation is easy.

[0033] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A centering and fixing device for anchor bolt installation in a deep overburden layer, characterized in that: It includes an anchor body (1), a sleeve (2) welded to the anchor at intervals, and an alignment mechanism connected to the sleeve (2); the sleeve (2) is provided with connecting threads (3) at both ends and a snap-fit ​​connecting protrusion (8) in the middle of the sleeve (2); the alignment mechanism includes a base bracket (9) connected to the sleeve (2), an extension bracket connected to the base bracket (9), and a backstop ring (6) abutting against both ends of the base bracket (9), and the backstop ring (6) is connected to the connecting threads (3) at both ends of the sleeve (2).

2. The deep overburden anchor installation centering and fixing device according to claim 1, characterized in that: The base bracket (9) includes a connecting part and a bracket part. The connecting part is provided with a snap-fit ​​recess, and the size of the snap-fit ​​recess is adapted to the size of the snap-fit ​​connecting protrusion (8).

3. The deep overburden anchor installation centering and fixing device according to claim 2, characterized in that: The bracket is mounted on the connecting part, and the bracket includes at least one base rod (4). The extended bracket includes multiple reinforcing support ribs (5) connected between the base rod (4) and the connecting part.

4. The deep overburden anchor installation centering and fixing device according to claim 3, characterized in that: The bottom rod (4) is inclinedly connected to the connecting part.

5. The deep overburden anchor installation centering and fixing device according to claim 3, characterized in that: Multiple reinforcing support ribs are connected to different positions of the base rod (4).

6. The deep overburden anchor installation centering and fixing device according to claim 1, characterized in that: A pressure ring (7) is provided between the anti-reverse ring (6) and the base bracket (9).

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