Hollow resin-encased prestressed anchor rod

Abstract

The utility model is suitable for the technical field of foundation pit slope reinforcement, and provides a hollow resin prestressed anchor rod, which comprises: a slope hole; the whole is pushed into the drilled hole in the slope hole, the anchor head body is cleaned in the process of pushing to ensure that the whole is pushed to the predetermined position in the process of reverse spiral, then the hollow threaded rod body is screwed into the hollow threaded rod body by rotating forward, the hollow threaded rod body advances against the piston one and the piston two, the front end of the cartridge pushes the rock wall connection top, the top breaks the soft sealing paper and protrudes and pierces into the hole wall rock, the occlusal area of the anchor head assembly and the rock mass is instantaneously increased, the cartridge is simultaneously cut by the cutter, the medicine flows out through the liquid outlet hole, the anchor cylinder and the hole wall are rapidly solidified to form a high-strength anchoring section, buckle two also prevent reverse rotation and prevent backtracking; finally, high-pressure grouting is carried out, the surrounding rock stratum is further anchored, the ball pad and the pad plate are pushed against the grout plug by tightening the self-locking nut to prevent the outflow of the grout, and the prestress is locked.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit slope protection technology, and in particular relates to a hollow resin-filled prestressed anchor rod. Background Technology

[0002] Slope protection for foundation pits refers to the process of supporting and reinforcing the slopes of foundation pits during underground engineering construction (such as building basements, underground parking lots, subways, etc.) using various engineering techniques to ensure the stability and construction safety of the pit slopes. It effectively prevents slope collapse and slippage, reduces the impact on the surrounding environment, ensures the safety of construction personnel and equipment, and provides a stable space for underground structure construction. Common support methods include soil nailing walls, anchor bolt support, sheet pile support, and concrete support. The specific choice needs to be determined comprehensively based on geological conditions, pit depth, surrounding environment, and other factors. Existing anchor rods mainly rely on the friction between the rod and the soil for fixation. This method has some drawbacks: First, the magnitude of the friction is greatly affected by the soil properties. For example, when the soil is loose or has a high water content, the friction may be insufficient, affecting the anchoring effect. Second, under high stress or dynamic loads, the anchor rod may loosen or be pulled out, reducing the stability of the support structure. In addition, the prestress transfer efficiency of friction-type anchor rods is relatively low, which may require greater prestress to meet design requirements, increasing construction difficulty and cost. Utility Model Content

[0003] This invention provides a hollow, resin-filled prestressed anchor rod, which aims to solve the problems of poor stability and low efficiency of currently used friction-type anchor rods.

[0004] This utility model is implemented as follows: a hollow, resin-filled prestressed anchor rod includes: a slope hole; an anchoring cylinder mounted on the slope hole, the anchoring cylinder being used to support the slope; an anchor head assembly mounted on one end of the anchoring cylinder, the anchor head assembly being used for drilling and auxiliary fixing; a resin assembly mounted inside the anchoring cylinder, the resin assembly being used to anchor the anchoring cylinder to the surrounding rock strata through a chemical agent; a propulsion and fixing assembly mounted on the anchoring cylinder, the propulsion and fixing assembly being used to compress the chemical agent package; and a fixing and sealing assembly mounted on one end of the propulsion and fixing assembly, the fixing and sealing assembly being used to seal and fix the propulsion and fixing assembly.

[0005] In this embodiment, the anchor head assembly includes: a threaded connecting cylinder threaded to one end of the anchoring cylinder, a support expansion portion assembled on one side of the threaded connecting cylinder, a connecting cylinder one fixedly installed at one end of the support expansion portion, a liquid outlet hole opened on the connecting cylinder one, an anchor head body fixedly installed at one end of the liquid outlet hole, a cutting blade fixedly installed at one end of the threaded connecting cylinder, and a buckle one fixedly installed on the outer surface of the threaded connecting cylinder.

[0006] In this embodiment, the support expansion part includes: a second connecting cylinder fixedly installed on one side of the threaded connecting cylinder, an installation cylinder fixedly installed on the second connecting cylinder, a rock wall connecting top movably installed inside the installation cylinder, and a soft sealing paper fixedly installed at the top of the installation cylinder.

[0007] In this embodiment, the resin assembly includes: a resin cartridge movably installed inside the anchor cylinder; a piston one movably installed inside the anchor cylinder; and a piston two movably installed inside the anchor cylinder.

[0008] In this embodiment, the propulsion fixing assembly includes: a propulsion connecting rod threadedly connected to one side of the anchoring cylinder, a hollow threaded rod body movably installed inside the propulsion connecting rod, and a snap fastener II fixedly installed on the outer surface of the hollow threaded rod body.

[0009] In this embodiment, the fixed sealing assembly includes: a grout stopper fixedly installed at one end of the hollow threaded rod, a middle pad fixedly installed at one end of the grout stopper, a connecting protrusion fixedly installed at one end of the pad, a ball washer threadedly connected to the outer surface of the hollow threaded rod, a hexagonal screw threadedly connected to the outer surface of the pad, and a self-locking nut threadedly connected to the outer surface of the pad.

[0010] In this embodiment, the first buckle is used to prevent the threaded connecting cylinder and the anchoring cylinder from reversing, and the second buckle is used to prevent the push connecting rod and the anchoring cylinder from reversing.

[0011] Compared with related technologies, the hollow resin-filled prestressed anchor rod provided by this utility model has the following beneficial effects: In use, the entire device is first pushed into the pre-drilled hole in the slope. During the reverse push, the anchor head clears away collapsed soft rock to ensure smooth advancement to the predetermined position. Then, the hollow threaded rod is screwed in forward. The hollow threaded rod pushes forward against pistons one and two, and the front end of the explosive cartridge pushes against the rock wall connection, breaking through the soft sealing paper and protruding into the hole wall rock, instantly increasing the engagement area between the anchor head assembly and the rock mass. Simultaneously, the cutting blade cuts through the explosive cartridge, and the agent flows out through the outlet hole, rapidly solidifying between the anchoring cylinder and the hole wall to form a high-strength anchoring section. The two locking mechanisms then... To prevent reverse rotation and backflow, high-pressure grouting is used to further anchor the surrounding rock layers. Tightening the self-locking nut pushes the ball pad and the pad plate to press against the grout stopper to prevent grout leakage and increase prestress locking. This allows the hollow threaded rod to continue to apply prestress to stabilize the rock layers when the slope deforms, providing immediate support and improving construction efficiency. If a local crack in the slope causes one end to break, mortar can be immediately injected through the central hole of the hollow threaded rod. The grout seeps along the original cured resin gaps, resealing the cracks and restoring the overall strength, avoiding the drawback of traditional anchors where "failure at one point means the entire section is scrapped". Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the anchor head assembly structure of this utility model; Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of structure A; Figure 4 This is a schematic diagram of the resin component propulsion and fixing component structure of this utility model; Figure 5 For the present utility model Figure 4 Enlarged schematic diagram of structure B; Figure 6 This is a schematic diagram of the cutting blade structure of this utility model.

[0013] In the diagram: 1. Slope hole; 2. Anchor cylinder; 3. Anchor head assembly; 4. Resin assembly; 5. Propulsion fixing assembly; 6. Fixing and sealing assembly; 301. Threaded connecting cylinder; 302. Support expansion part; 303. Cutting blade; 304. Connecting cylinder one; 305. Liquid outlet hole; 306. Anchor head body; 307. Clip one; 308. Connecting cylinder two; 309. Installation cylinder; 310. Rock wall connection top; 311. Soft sealing paper; 401. Resin cartridge; 402. Piston one; 403. Piston two; 501. Propulsion connecting rod; 502. Hollow threaded rod body; 503. Clip two; 601. Grout stop plug; 602. Pad; 603. Connecting protrusion; 604. Ball pad; 605. Hex bolt; 606. Self-locking nut. Detailed Implementation

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0015] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Example 1

[0016] A preferred embodiment of the hollow resin-filled prestressed anchor rod provided by this utility model is, for example... Figures 1 to 6 The image shows a hollow, resin-filled prestressed anchor bolt, comprising: a slope hole 1; an anchoring cylinder 2 mounted on the slope hole 1, the anchoring cylinder 2 being used to support the slope; an anchor head assembly 3 mounted on one end of the anchoring cylinder 2, the anchor head assembly 3 being used for drilling and auxiliary fixing; a resin assembly 4 mounted inside the anchoring cylinder 2, the resin assembly 4 being used to fix the anchoring cylinder 2 with a chemical agent; a pushing and fixing assembly 5 mounted on the anchoring cylinder 2, the pushing and fixing assembly 5 being used to compress the chemical agent package; and a fixing and sealing assembly 6 mounted on one end of the pushing and fixing assembly 5, the fixing and sealing assembly 6 being used to seal and fix the pushing and fixing assembly 5.

[0017] In this embodiment, the anchor head assembly 3 includes: a threaded connecting cylinder 301 threadedly connected to one end of the anchoring cylinder 2; a support expansion part 302 is assembled on one side of the threaded connecting cylinder 301; a connecting cylinder 304 is fixedly installed at one end of the support expansion part 302; a liquid outlet hole 305 is opened on the connecting cylinder 304; an anchor head body 306 is fixedly installed at one end of the liquid outlet hole 305; a cutting blade 303 is fixedly installed at one end of the threaded connecting cylinder 301; and a buckle 307 is fixedly installed on the outer surface of the threaded connecting cylinder 301.

[0018] Furthermore, the cutting blade 303 is configured as a hollow blade body, and the outer surface of the hollow blade body has holes, wherein the holes are used to allow resin to pass through and prevent the blade edge from becoming clogged.

[0019] In this embodiment, the support expansion part 302 includes: a second connecting cylinder 308 fixedly installed on one side of the threaded connecting cylinder 301, an installation cylinder 309 fixedly installed on the second connecting cylinder 308, a rock wall connecting top 310 movably installed inside the installation cylinder 309, and a soft sealing paper 311 fixedly installed at the top of the installation cylinder 309. Example 2

[0020] Based on Example 1, a preferred embodiment of the hollow resin-filled prestressed anchor rod provided by this utility model is, for example... Figures 1 to 6 As shown: Resin assembly 4 includes: a resin cartridge 401 movably installed inside the anchoring cylinder 2, a piston 402 movably installed inside the anchoring cylinder 2, and a piston 403 movably installed inside the anchoring cylinder 2.

[0021] Furthermore, by setting resin cartridge 401 and piston 402, the bonding strength between the resin in the resin cartridge 401 and the anchor cylinder 2 and the anchor rod is improved by more evenly compressing the resin.

[0022] In this embodiment, the propulsion fixing component 5 includes: a propulsion connecting rod 501 threadedly connected to one side of the anchoring cylinder 2, a hollow threaded rod body 502 movably installed inside the propulsion connecting rod 501, and a snap fastener 503 fixedly installed on the outer surface of the hollow threaded rod body 502.

[0023] In this embodiment, the fixed sealing assembly 6 includes: a grout stopper 601 fixedly installed at one end of the hollow threaded rod 502, a middle pad 602 fixedly installed at one end of the grout stopper 601, a connecting protrusion 603 fixedly installed at one end of the pad 602, a ball pad 604 threadedly connected to the outer surface of the hollow threaded rod 502, a hexagonal screw 605 threadedly connected to the outer surface of the pad 602, and a self-locking nut 606 threadedly connected to the outer surface of the pad 602.

[0024] In this embodiment, the first buckle 307 is used to prevent the threaded connecting cylinder 301 and the anchoring cylinder 2 from reversing, and the second buckle 503 is used to prevent the push connecting rod 501 and the anchoring cylinder 2 from reversing.

[0025] In use, the entire device is first pushed into the pre-drilled hole in the slope hole 1. During the pushing process, the anchor head body 306 clears the collapsed soft rock to ensure that the entire device can be smoothly pushed back to the predetermined position. Then, it is rotated forward to screw in the hollow threaded rod body 502. The hollow threaded rod body 502 pushes forward against the piston 1 402 and piston 2 403. The front end of the explosive cartridge pushes against the rock wall connection top 310, breaks through the soft sealing paper 311, protrudes and pierces into the rock wall, instantly increasing the interlocking area between the anchor head assembly 3 and the rock body. At the same time, the cutting blade 303 cuts the explosive cartridge, and the agent flows out through the liquid outlet 305. It quickly solidifies between the anchoring cylinder 2 and the hole wall to form a high-strength anchoring section. The second buckle 503 also prevents reverse rotation and backflow. Finally, high-pressure grouting is used to further anchor the surrounding rock layers. By tightening the self-locking nut 606, the ball pad 604 and the pad plate 602 are pushed to tighten the grout stop plug 601 to prevent grout from flowing out and increase prestress locking. This allows the hollow threaded rod 502 to continue to apply prestress to stabilize the rock layers when the slope deforms, and the whole structure immediately provides support force, improving construction efficiency. If a local crack in the slope causes one end to break, mortar can be injected immediately through the center hole of the hollow threaded rod 502. The grout seeps along the original cured resin gap, resealing the crack and restoring the overall strength, avoiding the drawback of traditional anchor rods where "one point of failure leads to the scrapping of the whole section".

[0026] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0027] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A hollow, resin-filled prestressed anchor rod, characterized in that, include: Slope hole (1); An anchoring cylinder (2) is fitted onto the slope hole (1), and the anchoring cylinder (2) is used to support the slope; An anchor head assembly (3) is fitted at one end of the anchoring cylinder (2), the anchor head assembly (3) being used for drilling and auxiliary fixing; A resin assembly (4) is installed inside the anchoring cylinder (2), the resin assembly (4) being used to anchor the anchoring cylinder (2) to the surrounding rock strata by means of a drug; An advancing and fixing assembly (5) is mounted on the anchoring cylinder (2), the advancing and fixing assembly (5) being used to compress the medicine pack; A fixing and sealing assembly (6) is assembled at one end of the propulsion fixing assembly (5), the fixing and sealing assembly (6) being used to seal and fix the propulsion fixing assembly (5).

2. The hollow resin-filled prestressed anchor bolt as described in claim 1, characterized in that, The anchor head assembly (3) includes: A threaded connecting cylinder (301) is threaded to one end of the anchoring cylinder (2). A support expansion part (302) is assembled on one side of the threaded connecting cylinder (301). A connecting cylinder one (304) is fixedly installed at one end of the support expansion part (302). A liquid outlet hole (305) is opened on the connecting cylinder one (304). An anchor head body (306) is fixedly installed at one end of the liquid outlet hole (305). A cutting blade (303) is fixedly installed at one end of the threaded connecting cylinder (301). A buckle one (307) is fixedly installed on the outer surface of the threaded connecting cylinder (301).

3. The hollow resin-filled prestressed anchor bolt as described in claim 2, characterized in that, The support expansion portion (302) includes: A connecting cylinder two (308) is fixedly installed on one side of the threaded connecting cylinder (301). An installation cylinder (309) is fixedly installed on the connecting cylinder two (308). A rock wall connecting top (310) is movably installed inside the installation cylinder (309). A soft sealing paper (311) is fixedly installed at the top of the installation cylinder (309).

4. The hollow resin-filled prestressed anchor rod as described in claim 3, characterized in that, The resin component (4) includes: A resin cartridge (401) is movably installed inside the anchoring cylinder (2). A piston (402) is movably installed inside the anchoring cylinder (2). A piston (403) is movably installed inside the anchoring cylinder (2).

5. The hollow resin-filled prestressed anchor rod as described in claim 4, characterized in that, The propulsion fixing component (5) includes: A threaded connection is made to a push connecting rod (501) on one side of the anchoring cylinder (2). A hollow threaded rod body (502) is movably installed inside the push connecting rod (501). A buckle (503) is fixedly installed on the outer surface of the hollow threaded rod body (502).

6. The hollow resin-filled prestressed anchor bolt as described in claim 5, characterized in that, The fixed sealing assembly (6) includes: A grout stopper (601) is fixedly installed at one end of the hollow threaded rod (502). A middle pad (602) is fixedly installed at one end of the grout stopper (601). A connecting protrusion (603) is fixedly installed at one end of the pad (602). A ball washer (604) is threadedly connected to the outer surface of the hollow threaded rod (502). A hexagonal screw (605) is threadedly connected to the outer surface of the pad (602). A self-locking nut (606) is threadedly connected to the outer surface of the pad (602).

7. The hollow resin-filled prestressed anchor rod as described in claim 6, characterized in that, The first buckle (307) is used to prevent the threaded connecting cylinder (301) and the anchoring cylinder (2) from reversing, and the second buckle (503) is used to prevent the push connecting rod (501) and the anchoring cylinder (2) from reversing.

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