Anchoring rod structure

Abstract

The application relates to the technical field of anchoring structural members, in particular to an anchor rod structure which comprises a first rod body provided with external threads on an outer side wall, a grouting hole penetrating through the first rod body in the axial direction, and a first end and a second end at two ends of the first rod body; a backing plate sleeved on the first end of the first rod body and fixedly connected with the first rod body; and a plurality of supporting members sleeved on the first rod body and threadedly connected with the first rod body, the plurality of supporting members being arranged at intervals in the axial direction of the first rod body, the supporting member comprising a tapered cylinder with an opening arranged towards the backing plate, the outer diameter of the tapered cylinder gradually decreasing from the first end to the second end of the first rod body, the maximum diameter of the tapered cylinder being equal to the diameter of a drill hole, and a plurality of through holes penetrating through the tapered cylinder in the radial direction. The application has the effect of enabling the anchor rod to be coaxially arranged in the drill hole to strengthen the supporting strength of the anchor rod structure.

Description

Technical Field

[0001] This application relates to the technical field of anchoring structural components, and in particular to an anchor rod structure. Background Technology

[0002] An anchor rod is a slender rod that penetrates deep into rock and soil to control its deformation. It may include components such as washers and nuts. As a tension member that penetrates deep into the strata, the anchor rod is connected to the engineering structure at one end and penetrates into the strata at the other end. The entire anchor rod is divided into a free section and an anchored section. The free section is where the tension at the anchor head is transmitted to the anchor body area, and its function is to apply prestress to the anchor rod. The anchored section is where cement mortar bonds the prestressing tendons to the soil layer. Its function is to increase the bonding friction between the anchor body and the soil layer, increase the bearing capacity of the anchor body, and transmit the tension in the free section to the depth of the soil.

[0003] The construction process for anchor bolts is as follows: measurement and positioning, hole layout, drilling, hole cleaning, mortar injection, anchor bolt installation, hole sealing, compaction testing, and final acceptance. Anchor bolt installation is often done manually by directly inserting the bolt into the mortar-filled borehole. Because the diameter of the borehole is larger than the diameter of the anchor bolt, it is difficult to keep the anchor bolt coaxial with the borehole during installation, resulting in poor support and reinforcement. There is room for improvement in this area. Utility Model Content

[0004] In order to ensure that the anchor bolt is installed in the borehole and remains coaxial with the borehole to enhance the support strength of the anchor bolt structure, this application provides an anchor bolt structure.

[0005] The anchor bolt structure provided in this application adopts the following technical solution:

[0006] An anchor structure includes:

[0007] The first rod has an external thread on its outer side wall and an axially penetrating grouting hole. The two ends of the first rod are the first end and the second end, respectively.

[0008] A pad, fitted onto the first end of the first rod and fixedly connected to the first rod; and

[0009] A plurality of support members are sleeved on the first rod body and threadedly connected to the first rod body. The plurality of support members are spaced apart along the axial direction of the first rod body. Each support member includes a conical cylinder with its opening facing the pad. The outer diameter of the conical cylinder gradually decreases from the first end to the second end of the first rod body. The maximum diameter of the conical cylinder is equal to the diameter of the drilled hole. The conical cylinder is provided with a plurality of radially penetrating through holes.

[0010] By adopting the above technical solution, after the anchor bolt structure is installed in the borehole, the cone cylinder is supported on the borehole wall, so that the first rod body is coaxial with the borehole, thereby strengthening the support strength of the anchor bolt structure. In addition, during the insertion of the anchor bolt structure into the borehole, the cone cylinder can also compress the mortar and the borehole wall to improve the density of the mortar and the smoothness of the borehole wall, further strengthening the support strength of the anchor bolt structure.

[0011] Optionally, the support member further includes a support cylinder, which is coaxially connected to the end of the cone cylinder facing the pad.

[0012] By adopting the above technical solution, the support cylinder increases the contact area between the support and the borehole wall, which can better adapt to the unevenness of the borehole wall and keep the first rod coaxial with the borehole wall.

[0013] Optionally, the support cylinder is provided with an axially extending slurry groove, which extends from the support cylinder to the middle of the cone cylinder and penetrates the sidewalls of the support cylinder and the cone cylinder radially.

[0014] By adopting the above technical solution, the grout passage is used to allow grout to pass through, so as to facilitate the smooth insertion of the anchor structure into the borehole.

[0015] Optionally, a second rod is connected to the second end of the first rod. The second rod has an axially extending grout passage hole that communicates with the grouting hole. An anchor head is fixed to the end of the second rod away from the first rod. The second rod has a plurality of grout outlet holes that are evenly distributed circumferentially. The grout outlet holes penetrate the side wall of the second rod radially.

[0016] By adopting the above technical solution, the anchor head strengthens the connection between the anchor structure and the drilled hole after the mortar has solidified. The grout passage hole, grout outlet hole, and grout injection hole are connected to allow mortar to be injected into the drilled hole through the grout injection hole, grout passage hole, and grout outlet hole.

[0017] Optionally, the second rod body is further provided with a plurality of sliding holes evenly distributed along the circumference. The sliding holes are located on the side of the slurry outlet hole away from the first rod body. An anchoring sleeve is slidably connected in the sliding holes. A stud is inserted in the anchoring sleeve. The stud is threadedly connected to the anchoring sleeve. The two ends of the stud extend out of the two ends of the anchoring sleeve, respectively. A pressing boss is connected to the end of the stud that extends into the slurry outlet hole. When the stud moves away from the slurry outlet hole relative to the anchoring sleeve, the pressing boss drives the diameter of the end of the anchoring sleeve that extends into the slurry outlet hole to expand.

[0018] By adopting the above technical solution, one end of the anchor sleeve passes through the sliding hole and is inserted into the grout passage hole. The extrusion boss is located in the grout passage hole, and then the stud is driven to rotate relative to the anchor sleeve, so that the extrusion boss extrudes the end of the anchor sleeve that extends into the grout passage hole, thereby expanding the diameter of the end of the anchor sleeve that extends into the grout passage hole, thus installing the anchor sleeve on the second rod body, making it less likely to fall off the second rod body, and making installation convenient.

[0019] Optionally, the end of the anchor sleeve that extends into the grout hole is provided with several circumferentially evenly distributed dividing grooves.

[0020] Optionally, a push piston may be slidably connected to the grout passage, and the end of the push piston facing the anchor head is conical.

[0021] Optionally, the second end of the first rod is provided with a connecting sleeve, and the two ends of the connecting sleeve are threadedly connected to the first rod and the second rod, respectively. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an anchor bolt structure according to an embodiment of this application. Figure 1 .

[0023] Figure 2 This is a schematic diagram of an anchor bolt structure according to an embodiment of this application. Figure 2 .

[0024] Figure 3 This is a side view of the second rod in an embodiment of this application.

[0025] Figure 4 yes Figure 3 Sectional view along the AA direction.

[0026] Explanation of reference numerals in the attached drawings: 10, First rod; 11, External thread; 12, Grouting hole; 13, First end; 14, Second end; 15, Connecting sleeve; 20, Pad; 21, Nut; 22, Grout stop plug; 30, Support; 31, Conical cylinder; 311, Through hole; 32, Support cylinder; 321, Grout passage groove; 40, Second rod; 41, Grout passage hole; 42, Grout outlet hole; 43, Sliding hole; 44, Anchor sleeve; 441, Dividing groove; 45, Stud; 46, Extrusion boss; 47, Push piston; 50, Anchor head. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] This application discloses an anchor bolt structure. (Refer to...) Figure 1 and Figure 2 The anchor structure includes a first rod body 10, a pad 20, and several support members 30.

[0029] The first rod 10 is arranged in the shape of a straight rod. The outer side wall of the first rod 10 is provided with an external thread 11. The first rod 10 is provided with a grouting hole 12 that runs through the axis. The grouting hole 12 is coaxial with the first rod 10. The two ends of the first rod 10 are a first end 13 and a second end 14, respectively. The first end 13 is located above the second end 14.

[0030] A pad 20 is fitted onto the first end 13 of the first rod 10. A nut 21 is threaded onto the upper end of the first rod 10, and the nut 21 abuts against the upper side of the pad 20. A grout stopper 22 is also threaded onto the first rod 10, and the grout stopper 22 abuts against the lower side of the pad 20, so as to cooperate with the nut 21 to fix the pad 20 to the first end 13 of the first rod 10.

[0031] Several support members 30 are sleeved on the first rod body 10 and spaced apart along the axial direction of the first rod body 10. The number of support members 30 is at least two. Each support member 30 includes a tapered cylinder 31 with its opening facing the pad plate 20. The outer diameter of the tapered cylinder 31 gradually decreases from the first end 13 to the second end 14 of the first rod body 10. The maximum diameter of the tapered cylinder 31 is equal to the diameter of the drilled hole, providing support for the first rod body 10 installed in the drilled hole, ensuring that the first rod body 10 and the drilled hole are coaxial. The tapered cylinder 31 is threaded onto the first rod body 10. Threaded holes can be directly machined into the tapered cylinder 31, or a nut threaded onto the first rod body 10 can be provided at each end of the base plate of the tapered cylinder 31 to clamp and fix the tapered cylinder 31 onto the first rod body 10. The specific configuration can be determined according to actual conditions. The tapered cylinder 31 has several radially penetrating through holes 311 for mortar to pass through.

[0032] When the anchor bolt structure is installed in the borehole, the cone 31 compresses the mortar inside the borehole, making the mortar more compact after solidification, thereby improving the bonding force between the mortar and the first rod 10 after solidification. The cone 31 supports the borehole wall to provide support for the first rod 10, so that the first rod 10 remains coaxial with the borehole, thereby strengthening the support strength of the anchor bolt structure.

[0033] The support member 30 also includes a support cylinder 32, which is coaxially fixed to the end of the tapered cylinder 31 facing the pad 20. The outer diameter of the support cylinder 32 is equal to the diameter of the drilled hole. The support cylinder 32 increases the contact area between the support member 30 and the drilled hole wall, better adapting to the unevenness of the drilled hole wall and keeping the first rod 10 coaxial with the drilled hole wall. In addition, the support cylinder 32 can also flatten the drilled hole wall, improving the flatness of the drilled hole wall, thereby improving the coaxiality of the first rod 10 with the drilled hole.

[0034] The support cylinder 32 is provided with a grout passage groove 321 extending axially. The grout passage groove 321 extends from the support cylinder 32 to the middle of the cone cylinder 31. The grout passage groove 321 penetrates the side wall of the support cylinder 32 and the cone cylinder 31 radially. The grout passage groove 321 is used to allow mortar to pass through, so as to facilitate the smooth insertion of the anchor structure into the borehole.

[0035] The second end 14 of the first rod 10 is connected to the second rod 40. A connecting sleeve 15 is provided between the first rod 10 and the second rod 40. The inner side wall of the connecting sleeve 15 is provided with internal threads. The two ends of the connecting sleeve 15 are threaded to the first rod 10 and the second rod 40 respectively, so as to connect the first rod 10 and the second rod 40 together. At the same time, the length of the anchor structure can also be adjusted by rotating the connecting sleeve 15 with the first rod 10 and the second rod 40.

[0036] The second rod 40 is provided with an axially extending grout passage hole 41, which is coaxial with the second rod 40 and communicates with the grouting hole 12. The second rod 40 is also provided with several circumferentially evenly distributed grout outlet holes 42, which radially penetrate the sidewall of the second rod 40 and communicate with the grout passage hole 41, allowing mortar to be injected into the borehole through the grouting hole 12, the grout passage hole 41, and the grout outlet hole 42. An anchor head 50 is also fixed to the lower end of the second rod 40. The anchor head 50 is conical in shape, with its diameter gradually decreasing from top to bottom. The anchor head 50 is used to increase the connection strength between the anchor structure and the borehole.

[0037] The second rod 40 is also provided with several sliding holes 43 evenly distributed circumferentially. The sliding holes 43 are located below the slurry outlet hole 42 and penetrate the side wall of the second rod 40. An anchoring sleeve 44 is slidably connected in the sliding hole 43. The outer diameter of the anchoring sleeve 44 is equal to the diameter of the sliding hole 43. A stud 45 is inserted in the anchoring sleeve 44 and is threadedly connected to the anchoring sleeve 44. The two ends of the stud 45 extend out of the two ends of the anchoring sleeve 44, respectively. The end of the stud 45 that extends into the slurry outlet hole 41 is connected to a pressing boss 46. The diameter of the pressing boss 46 gradually decreases from the inside to the outside, and the minimum diameter of the pressing boss 46 is equal to the diameter of the stud 45. One end of the anchor sleeve 44 passes through the sliding hole 43 and is inserted into the grout passage hole 41. The extrusion boss 46 is located in the grout passage hole 41. Then, the stud 45 is driven to rotate relative to the anchor sleeve 44, so that the extrusion boss 46 extrudes the end of the anchor sleeve 44 that extends into the grout passage hole 41, thereby expanding the diameter of the end of the anchor sleeve 44 that extends into the grout passage hole 41, thus installing the anchor sleeve 44 on the second rod body 40, making it less likely to fall off the second rod body 40.

[0038] The end of the anchor sleeve 44 that extends into the grout passage hole 41 is provided with several circumferentially evenly distributed dividing grooves 441. The dividing grooves 441 penetrate the side wall of the anchor sleeve 44 to facilitate the extrusion boss 46 to extrude the end of the anchor sleeve 44 that extends into the grout passage hole 41, thereby expanding the diameter of the end of the anchor sleeve 44 that extends into the grout passage hole 41.

[0039] A push piston 47 can also be slidably connected in the grout passage hole 41. The end of the push piston 47 facing the anchor head 50 is conical. After the anchor structure is installed in the borehole, mortar is injected into the borehole through the grouting hole 12, the grout passage hole 41 and the grout outlet hole 42. The mortar drives the push piston 47 to move downward. The conical end of the lower end of the push piston 47 drives the anchor sleeve 44 to slide outward and extend into the sliding hole 43 to insert into the mortar, so as to further strengthen the connection strength between the second rod body 40 and the mortar.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An anchor bolt structure, characterized in that, include: The first rod (10) has an external thread (11) on its outer side wall, and a grouting hole (12) that runs through the axial direction on the first rod (10). The two ends of the first rod (10) are the first end (13) and the second end (14) respectively. A pad (20) is fitted onto the first end (13) of the first rod (10) and fixedly connected to the first rod (10); and A plurality of support members (30) are sleeved on the first rod body (10) and threadedly connected to the first rod body (10). The plurality of support members (30) are spaced apart along the axial direction of the first rod body (10). Each support member (30) includes a tapered cylinder (31) with its opening facing the pad (20). The outer diameter of the tapered cylinder (31) gradually decreases from the first end (13) to the second end (14) of the first rod body (10). The maximum diameter of the tapered cylinder (31) is equal to the diameter of the drilled hole. The tapered cylinder (31) is provided with a plurality of radially penetrating through holes (311).

2. The anchor bolt structure according to claim 1, characterized in that: The support member (30) also includes a support cylinder (32), which is coaxially connected to one end of the cone cylinder (31) facing the pad (20).

3. The anchor bolt structure according to claim 2, characterized in that: The support cylinder (32) is provided with an axially extending slurry groove (321), which extends from the support cylinder (32) to the middle of the cone cylinder (31) and the slurry groove (321) penetrates the side wall of the support cylinder (32) and the cone cylinder (31) radially.

4. The anchor bolt structure according to claim 1, characterized in that: The second end (14) of the first rod (10) is connected to the second rod (40). The second rod (40) is provided with a grout passage hole (41) extending along the axial direction. The grout passage hole (41) is connected to the grouting hole (12). An anchor head (50) is fixed at the end of the second rod (40) away from the first rod (10). The second rod (40) is provided with a plurality of grout outlet holes (42) evenly distributed along the circumference. The grout outlet holes (42) penetrate the side wall of the second rod (40) radially.

5. The anchor bolt structure according to claim 4, characterized in that: The second rod (40) is also provided with a plurality of sliding holes (43) evenly distributed along the circumference. The sliding holes (43) are located on the side of the slurry outlet (42) away from the first rod (10). An anchor sleeve (44) is slidably connected in the sliding holes (43). A stud (45) is inserted in the anchor sleeve (44). The stud (45) is threadedly connected to the anchor sleeve (44). The two ends of the stud (45) extend out of the two ends of the anchor sleeve (44). A pressing boss (46) is connected to the end of the stud (45) that extends into the slurry passage hole (41). When the stud (45) moves away from the slurry passage hole (41) relative to the anchor sleeve (44), the pressing boss (46) drives the diameter of the end of the anchor sleeve (44) that extends into the slurry passage hole (41) to expand.

6. The anchor bolt structure according to claim 5, characterized in that: The end of the anchor sleeve (44) that extends into the grout hole (41) is provided with several circumferentially evenly distributed dividing grooves (441).

7. The anchor bolt structure according to claim 5, characterized in that: A push piston (47) can also be slidably connected in the grout passage (41), and the end of the push piston (47) facing the anchor head (50) is arranged in a conical shape.

8. The anchor bolt structure according to claim 4, characterized in that: The second end (14) of the first rod (10) is provided with a connecting sleeve (15), and the two ends of the connecting sleeve (15) are threadedly connected to the first rod (10) and the second rod (40) respectively.

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