Anchor rod bearing body

Abstract

The utility model relates to the technical field of anchoring structural members, in particular to an anchor rod bearing body. According to the anchor rod bearing body, an existing anchor rod bearing body is improved, the grouting pipe is fixedly arranged at the position of the lower bearing seat, and the grouting pipe is provided with the nozzle facing the lower portion of the lower bearing seat, so that in the process of lowering an anchor rod into a drill hole, a pumping system can be adopted to spray grout through the lower portion of the lower bearing seat in the grouting pipe; obstacle soil in front of the lowering path can be washed away or mixed into slurry by spraying slurry, the dredging purpose is achieved, in this way, resistance borne by the anchor rod in the lowering process is greatly reduced, and the anchor rod can be conveniently lowered to the preset depth.

Description

Technical Field

[0001] The utility model relates to the technical field of anchoring structural components, in particular to an anchor rod bearing body. Background Art

[0002] Anchor components are widely used in infrastructure projects, and as the structural stability requirements of building structures become higher, the bearing capacity of anchor components also increases. In order to improve the bearing capacity of anchor components, the Chinese utility model patent with the authorization announcement number CN214656995U discloses a bag-type expanded anchor rod bearing body, which includes two bearing seats facing each other up and down and a center tube connected between the two bearing seats, and also includes bags sealed and connected to the two bearing seats at both ends. After the bearing body is placed in a predetermined position in the soil layer, grouting is injected into the bag through a grouting pipe to expand the bag in the soil layer, and a good bearing effect is achieved when the slurry therein solidifies.

[0003] However, when the carrier is lowered into the soil layer along the borehole, the outer surface of the carrier is wrinkled and not smooth because the bag is wrapped around the integral structure composed of the central tube and the upper and lower bearing seats, resulting in a large friction resistance between the carrier and the borehole wall, especially when there is a collapse inside the borehole, it is very difficult to lower the carrier. Although a protective cap with a pointed structure is installed on the lower bearing seat in the above-mentioned prior art to play a guiding role through the protective cap, there is still hard friction between the protective cap and the hole wall, and the drag reduction effect is not obvious enough. Utility Model Content

[0004] The utility model aims to provide an anchor rod bearing body to solve the problem that the existing anchor rod bearing body is greatly obstructed when being lowered into a borehole.

[0005] The anchor rod bearing body of the utility model comprises a lower bearing seat and also comprises a grouting pipe fixedly arranged at the lower bearing seat, wherein the grouting pipe has a nozzle facing below the lower bearing seat so as to clear the front of the anchor rod lowering path by spraying liquid downward through the nozzle while the anchor rod is lowered into the borehole.

[0006] Furthermore, the anchor rod bearing body is a bag-type expanded anchor rod bearing body, and the grouting pipe passes through the bearing plates of the two bearing seats in sequence and is sealed and connected to the bearing plates of the two bearing seats.

[0007] Furthermore, a locking nut for locking the anchor rod body is integrally connected to the lower side surface of the lower bearing seat. The locking nut is a cylindrical structure with one end open and the other end closed. The open end of the locking nut is sealingly connected to the lower bearing seat.

[0008] Furthermore, the lower end of the grouting pipe forms a nozzle, and the nozzle is lower than the lower end of the locking nut.

[0009] Further, the lower end of the grouting pipe is close to the lower end of the locking nut.

[0010] Further, the bearing plate of the lower bearing seat and the locking nut are integrally formed by stamping.

[0011] Further, the bearing plate of the lower bearing seat and the locking nut are welded and sealed.

[0012] Further, the locking nut is exposed.

[0013] Further, the lower end of the locking nut is a ball head or a cone head.

[0014] Further, the grouting pipe and the bearing plate of the bearing seat are welded and sealed.

[0015] The utility model improves the existing anchor rod carrier. By fixedly arranging a grouting pipe at the lower bearing seat, and the grouting pipe has a nozzle facing downward below the lower bearing seat. Then, during the process of lowering the anchor rod into the drill hole, a pumping system can be used to spray slurry through the grouting pipe below the lower bearing seat. By spraying the slurry, the obstacle soil in front of the lowering path can be washed away or mixed into mud, achieving the purpose of dredging. In this way, the resistance suffered during the lowering of the anchor rod is greatly reduced, and it is convenient to lower the anchor rod to the predetermined depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of Embodiment 1 of the anchor rod carrier of the utility model;

[0017] Figure 2 is Figure 1 an enlarged view of part A in

[0018] Figure 3 is Figure 1 an enlarged view of part B in

[0019] In the figure: 1, central pipe; 2, inner grouting pipe; 5, bladder; 6, hoop; 7, elastic sealing member; 8, exhaust valve; 9, outer grouting pipe; 20, flattened structure; 21, one-way valve; 30, bearing plate; 31, sleeve; 33, locking nut; 310, outer convex ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The features and performance of the present utility model will be further described in detail below in conjunction with embodiments.

[0021] The anchor rod carrier of the present utility model is mainly an improvement made in view of the problem that during the process of lowering an anchor rod into the soil layer after the drilling of the anchor rod in the prior art is completed, the frictional resistance of the drilling hole wall or local blockage caused by the collapse inside the drilling hole makes it difficult for the anchor rod to be lowered in the drilling hole, and the construction is rather difficult. The present utility model fixedly arranges a grouting pipe at the lower bearing seat of the anchor rod carrier, and the grouting pipe has a nozzle facing downward below the lower bearing seat. In this way, when the anchor rod is lowered into the drilling hole, the grouting pipe moves downward along with the lower bearing seat of the anchor rod carrier. During this process, water or slurry can be continuously sprayed downward through the nozzle or according to the situation of the anchor rod being blocked, washing away or mixing into mud the obstacle soil in front of the lowering path, thereby reducing the resistance received by the lowering of the anchor rod and enabling the anchor rod to be conveniently lowered to the required depth position.

[0022] This concept can be applied to almost all anchor rods that are drilled first and then lowered. A specific embodiment taking a bag-type expanded body anchor rod carrier as an example is provided below.

[0023] As Figures 1-3 shown, the same as the prior art cited in the background art, the bag-type expanded body anchor rod carrier includes two relatively upper and lower bearing seats and a central pipe 1 connected between the two bearing seats, and the "upper and lower" direction herein is based on the orientation of the bag-type expanded body anchor rod carrier during use. The bearing seat specifically includes a bearing plate 30 and a sleeve 31 fixedly connected to one side plate surface of the bearing plate 30. The sleeve 31 of the upper bearing seat is located on the lower side surface of its bearing plate 30, and the sleeve 31 of the lower bearing seat is located on the upper side surface of its bearing plate 30. A through hole is provided in the middle of the bearing plate 30 at a position corresponding to the inside of the sleeve 31, and both ends of the central pipe 1 are respectively connected to the positions of the bearing plate 30 corresponding to the through hole, so as to form a vertically penetrating central hole in the middle of the overall structure mainly formed by the two bearing seats and the central pipe 1.

[0024] The bag-type expanded body anchor rod carrier further includes a bag 5. The bag 5 is a bag-shaped structure with both ends open. The two end openings of the bag 5 are respectively connected to the sleeves 31 of the upper and lower bearing seats, and thus jointly form a sealed grouting space with the overall structure mainly formed by the two bearing seats and the central pipe 1. An outwardly convex ring 310 is formed on the barrel wall of the sleeve 31 by roll forming. The size of the bearing plate 30 is larger than the outer diameter of the sleeve 31 and extends out of the outer wall of the sleeve 31. Thus, an annular connection groove is jointly formed by the outwardly convex ring 310, the edge of the bearing plate 30, and the sleeve 31 between the two. The bottom of the connection groove is coated with an elastic sealing member 7, and the bag opening of the bag 5 is wrapped on the elastic sealing member 7 and tightened by a hoop 6.

[0025] An inner grouting pipe 2 is also installed on the bearing plate 30 of the upper bearing seat, and the inner end of the inner grouting pipe 2 extends into the grouting space. The lower end of the inner grouting pipe 2 forms a flattened structure 20 through flattening, which can block the grouting pipe. A one-way valve 21 is also provided on the pipe wall of the inner grouting pipe 2 above the lower end, and the one-way valve 21 is used to prevent the slurry from flowing back after the slurry is flushed into the grouting space through the inner grouting pipe 2. Of course, in order to avoid pressure buildup inside the grouting space when grouting into the grouting space, in this embodiment, an exhaust valve 8 is also installed on the bearing plate 30 of the upper bearing seat, which is used to discharge the internal gas when grouting into the grouting space.

[0026] Based on the design concept of the present invention, the difference between the bladder-type expanding body anchor carrier of this embodiment and the prior art cited in the background art is that the bladder-type expanding body anchor carrier further includes an outer grouting pipe 9. The outer grouting pipe 9 sequentially passes through the bearing plates 30 of the two bearing seats and is hermetically connected to the bearing plates 30 of the two bearing seats, so as to realize the fixed setting with the overall structure mainly formed by the two bearing seats and the central pipe 1. The lower end of the outer grouting pipe 9 is arranged downward and forms the described nozzle, which can spray water or slurry downward during the process of lowering the anchor in the drill hole to dredge the front side of the lowering path.

[0027] Fixing the outer grouting pipe 9 in this way can integrally arrange the outer grouting pipe 9 in the bladder 5. The outside of the entire anchor carrier is wrapped by the bladder 5 like the existing bladder-type expanding body anchor carrier, making use of the internal space of the carrier without occupying external space and facilitating ensuring the seal of the bladder 5. Of course, in another embodiment, when the outer wall size of the bearing plate 30 extending out of the sleeve is large, the outer grouting pipe 9 can be sequentially installed on the outer walls of the two bearing plates 30 outside the sleeve 31 and is entirely outside the bladder 5.

[0028] Moreover, in the embodiments described above, the outer grouting pipe 9 is a rigid pipe as a whole. The positions passing through the two bearing plates 30 in sequence can be fixedly connected by welding while ensuring a good sealing effect. Moreover, the lower end nozzle of the outer grouting pipe 9 has a fixed orientation and can directly serve as a spray nozzle. Not necessarily, in another embodiment, the outer grouting pipe 9 may include two rigid pipes and a flexible pipe connected between the two rigid pipes. The two rigid pipes are fixedly installed at the two bearing plates 30, and the flexible pipe is located inside the bladder 5 and connects the two rigid pipes. Alternatively, in one embodiment, the outer grouting pipe 9 includes a rigid pipe at the lower end and a flexible pipe connected above the rigid pipe. The rigid pipe is fixedly and sealed through the lower bearing plate 30, which can ensure the orientation of the spray nozzle. The flexible pipe extends upward along the central pipe 1 and is sealed through the upper bearing plate 30. In other embodiments, the sealing and fixing between the outer grouting pipe 9 and the bearing plate 30 can also be achieved by gluing with waterproof sealant. Of course, in order to achieve different spraying effects, the spray nozzle can also be formed by the outlet of a nozzle separately installed at the lower end of the outer grouting pipe 9.

[0029] Based on the above embodiments, another embodiment of the present utility model is as follows. When the anchor carrier is in use, an anchor rod body needs to be inserted into the central pipe 1, and a locking nut is connected to the lower end of the anchor rod body passing through the central pipe 1. Since the outer grouting pipe 9 is fixedly arranged at the lower bearing seat, in order to facilitate installation and simplify the structure, in this embodiment, a protective cap that covers the connection part between the locking nut and the anchor rod body in the prior art cited in the background art is no longer provided. At the same time, considering that the outer grouting pipe 9 is fixedly arranged at the lower bearing seat and sprays water or grout downward during lowering, if the threaded connection position between the anchor rod body and the locking nut is directly exposed without protection, serious corrosion will occur, directly affecting the service life and bearing capacity of the anchor rod. Therefore, in this embodiment, as Figures 1-2 shown, a locking nut 33 for locking the lower end of the anchor rod body is integrally connected to the lower side surface of the lower bearing seat. Moreover, the locking nut 33 is a cylindrical structure with one end open and one end closed, and the open end of the locking nut 33 is hermetically connected to the lower bearing seat. With such a setting, although the locking nut is exposed as a whole, the threaded connection part between the locking nut and the anchor rod body is not exposed to the external humid environment, and the problem that the threaded connection position between the anchor rod body and the locking nut is easily corroded due to the grout spraying of the outer grouting pipe 9 can be avoided. Of course, as mentioned above, when the outer wall dimension of the bearing plate 30 extending out of the sleeve is large, in the embodiment where the outer grouting pipe 9 is sequentially inserted through the outer walls of the two bearing plates 30 outside the sleeve 31 and is entirely outside the bladder 5, the same method as the prior art cited in the background art can still be adopted, that is, the connection position between the locking nut 33 and the anchor rod body is covered inside by a protective cap.

[0030] Specifically, in different embodiments, the sealing connection form between the locking nut 33 and the lower bearing seat may be different. For example, in one embodiment, the bearing plate 30 of the lower bearing seat and the locking nut 33 are integrally stamped parts, so that the outer surface has high integrity and is not easily rusted. Or in another embodiment, the bearing plate 30 of the lower bearing seat and the locking nut 33 are welded and sealed, and this method has a lower processing cost.

[0031] In order to make the outer grouting pipe 9 achieve a better jet dredging effect, when setting the position of the nozzle, it is preferably lower than the lower end of the locking nut 33, so that the front side of the locking nut 33 can be jet dredged in advance, avoiding the problem that the lowering efficiency is affected by dredging after the locking nut 33 is blocked. However, if the position of the nozzle is too low relative to the locking nut 33, then a small overhanging structure is formed at the front end of the carrier, which is easy to be knocked or pushed against and damaged. Therefore, in an optimized embodiment, the lower end nozzle of the grouting pipe is close to the lower end of the locking nut 33. Moreover, in order to further reduce resistance, the lower end of the locking nut 33 is a ball head or a cone head.

[0032] When the anchor carrier of the present invention is in use, first insert the anchor rod body into the central pipe 1, and screw the lower end into the locking nut 33, that is, form a bladder-type expanded anchor. Then connect the grouting pipelines to the inner and outer grouting pipes 9 respectively, lower the anchor into the drill hole. During the lowering process, water can be continuously sprayed forward through the outer grouting pipe 9 to ensure dredging of the front side, or water can be sprayed forward through the outer grouting pipe 9 for dredging when encountering resistance during lowering. After the bladder-type expanded anchor is sunk into the drill hole to the predetermined depth position, grout is injected into the grouting space through the inner grouting pipe 2, and the bladder 5 is inflated. When the grout solidifies, it can play a bearing effect.

[0033] The above is a specific description of the present invention taking the bladder-type expanded anchor carrier as an example. In other embodiments, the anchor carrier can also be an anchor with only a lower bearing seat or an anchor plate, and the outer grouting pipe is directly fixedly installed on the lower bearing seat or the anchor plate.

[0034] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present invention should be included in the protection scope of the present invention by the same token.

Claims

1. An anchor bearing body, including a lower bearing seat, characterized in that: It also includes a grouting pipe fixedly arranged at the lower bearing seat, which has a nozzle facing below the lower bearing seat, so that when the anchor rod is lowered into the borehole, liquid is sprayed downward through the nozzle to dredge the front of the anchor rod's lowering path.

2. The anchor bearing body according to claim 1, characterized in that: The anchor rod bearing body is a bag-type expanded anchor rod bearing body, and the grouting pipe passes through the bearing plates of the two bearing seats in sequence and is sealed and connected with the bearing plates of the two bearing seats.

3. The anchor bearing body according to claim 2, characterized in that: A locking nut for locking the anchor rod body is integrally connected to the lower side surface of the lower bearing seat. The locking nut is a cylindrical structure with one end open and the other end closed. The open end of the locking nut is sealingly connected to the lower bearing seat.

4. The anchor bearing body according to claim 3, characterized in that: The lower end of the grouting pipe forms a nozzle, which is lower than the lower end of the locking nut.

5. The anchor bearing body according to claim 4, characterized in that: The lower end of the grouting pipe is close to the lower end of the locking nut.

6. The anchor bearing body according to claim 3, 4 or 5, characterized in that: The bearing plate of the lower bearing seat and the locking nut are an integrated stamping part.

7. The anchor bearing body according to claim 3, 4 or 5, characterized in that: The bearing plate of the lower bearing seat is welded and sealed with the locking nut.

8. The anchor bearing body according to claim 3, 4 or 5, characterized in that: The locking nut is exposed.

9. The anchor bearing body according to claim 3, 4 or 5, characterized in that: The lower end of the locking nut is a ball head or a cone head.

10. The anchor bearing body according to any one of claims 2 to 5, characterized in that: The grouting pipe is welded and sealed to the bearing plate of the bearing seat.

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