Recyclable prestressed anchor rod structure and construction method

Abstract

The application provides a recyclable prestressed anchor rod structure and a construction method, and relates to the technical field of anchor rod support, which comprises the following steps: the anchor rod structure is connected with a limiting spacer and an unlocking mechanism; a fixed structure is sleeved outside the unlocking mechanism; a limiting pin mounting hole is formed in the side wall of the fixed structure, and a limiting assembly is slidingly installed; one end of the limiting assembly extends into the cavity of the fixed structure and abuts against the unlocking mechanism; in the tensioning and locking state, the contact part of the unlocking mechanism and the limiting assembly is a plane, forming an axial mechanical engagement structure; when recycling is needed, the prestress of the anchor rod structure is released, the anchor rod structure is pushed towards the hole bottom, the limiting spacer drives the unlocking mechanism to move downward and extrude the limiting assembly to retract radially, the mechanical engagement is released, and when the unlocking mechanism moves to the bottom of the limiting assembly, the anchor rod structure is pulled upward to extract the reusable part to complete the recycling. The application solves the problems of insufficient overall use reliability of the anchor rod, low efficiency of on-site recycling construction and limited support bearing performance.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt support technology, and more specifically, to a recyclable prestressed anchor bolt structure and construction method. Background Technology

[0002] In existing anchor bolt support technologies, recyclable anchor bolts are currently divided into two categories: thermoplastic and mechanical. The wires of thermoplastic anchor bolts are prone to damage during recycling, which can easily cause the thermoplastic recycling operation to fail. The thermoplastic process is time-consuming and the overall construction and recycling efficiency is low. The thermoplastic filling material can only fill the hole and cannot improve the anchoring force, which directly results in poor anchoring performance. The thermoplastic forming position will also create a weak stress area in the component, which will significantly reduce the overall load-bearing capacity of the anchor bolt. Mechanical anchor bolts are divided into various types according to their internal unlocking structure. Different unlocking methods have inherent defects. Among them, the auxiliary cable pull-out mechanical anchor bolt requires the additional deployment of supporting auxiliary cables, which leads to insufficient overall reliability of the anchor bolt, low on-site recycling construction efficiency, and limited support load-bearing capacity.

[0003] Therefore, there is an urgent need for a recyclable prestressed anchor structure and construction method to solve the problems of insufficient overall reliability of anchors, low efficiency of on-site recycling construction, and limited support bearing capacity. Summary of the Invention

[0004] The purpose of this invention is to provide a recyclable prestressed anchor structure and construction method to improve the aforementioned problems. To achieve this purpose, the technical solution adopted by this invention is as follows:

[0005] In a first aspect, this application provides a recyclable prestressed anchor structure, comprising:

[0006] The reuse section includes an anchor structure and an unlocking mechanism, wherein the bottom end of the anchor structure is connected to the top end of the unlocking mechanism via a limiting partition;

[0007] The retention section includes a fixing structure sleeved around the unlocking mechanism. A radially penetrating limit pin mounting hole is provided on the side wall of the fixing structure. A limit component is slidably installed within the limit pin mounting hole. One end of the limit component extends into the cavity of the fixing structure and abuts against the unlocking mechanism. In the tension-locked state, the contact area between the unlocking mechanism and the limit component is planar, forming an axial mechanical engagement structure. When recycling is required, the prestress of the anchor structure is released, and the anchor structure is pushed towards the bottom of the hole. The limit stop causes the unlocking mechanism to move downwards, squeezing the limit component to retract radially, releasing the mechanical engagement. When the unlocking mechanism moves to the bottom of the limit component, it pulls the anchor structure upwards to extract the reuse section, completing the recycling process.

[0008] Secondly, this application also provides a construction method for a recyclable prestressed anchor structure, comprising:

[0009] Mark the drilling position and drill to the preset depth;

[0010] Assemble the anchor bolt structure, unlocking mechanism, limiting baffle, fixing structure and limiting components, and set the anchor solid grouting pipe on the outer wall of the anchor bolt structure to form the anchor bolt assembly;

[0011] The anchor bolt assembly is lowered along the borehole to the designed depth, and the anchor bolt axis is kept aligned with the borehole axis during the lowering process.

[0012] Grouting is performed at the bottom of the anchor grouting pipe until grout overflows from the hole opening, at which point grouting is stopped.

[0013] After the grout reaches the preset strength, the anchor structure is prestressed and tensioned, and the prestress loss state is locked.

[0014] After the temporary support is completed, the prestress is released, the limiting partition is axially hammered to push the unlocking mechanism to compress the limiting component and retract radially, the reusable part of the anchor bolt assembly is pulled out, and the borehole is grouted and sealed.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention utilizes the planar engagement between the unlocking mechanism and the limiting component in a tensioned and locked state. Under tension loads, the limiting component will not retract outwards, resulting in high engagement stiffness and preventing anchor prestress attenuation during the support's service life. Furthermore, the limiting component slides along the limiting pin mounting holes of the fixed structure, preventing grout from clogging the locking contact surface during grouting operations. This also facilitates batch processing and on-site installation, reducing construction labor and assembly time. Subsequently, by first releasing the anchor prestress and then pushing the anchor structure towards the bottom of the hole, the unlocking mechanism automatically retracts radially, relying on the limiting baffle, thus automatically releasing the planar engagement without the need for external disassembly tools, simplifying the recovery process. Finally, after the unlocking mechanism moves past the bottom of the limiting component, it completely disengages without any clamping interference, and pulling upwards allows for the complete removal of the anchor and unlocking mechanism reusable components in one go. In summary, this invention solves the problems of insufficient overall anchor reliability, low on-site recovery efficiency, and limited support bearing capacity.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention 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.

[0019] Figure 1 This is a schematic diagram of the recyclable prestressed anchor structure described in an embodiment of the present invention;

[0020] Figure 2 This is a partial enlarged view of the anchor bolt structure after connection in an embodiment of the present invention;

[0021] Figure 3 This is a perspective view of the fixing structure described in an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of the fixing structure described in an embodiment of the present invention;

[0023] Figure 5 These are perspective and front views of the limiting pin described in the embodiments of the present invention;

[0024] Figure 6 This is a schematic diagram of the construction method for the recyclable prestressed anchor structure described in this embodiment of the invention.

[0025] Figure 7 This is a schematic diagram of the equipment structure of the recyclable prestressed anchor bolt structure described in an embodiment of the present invention.

[0026] The diagram is labeled as follows: 1. Anchor bolt structure; 2. Unlocking mechanism; 3. Limiting barrier; 4. Fixing structure; 5. Limiting component; 6. Anchor bolt sleeve; 7. Anchor body grouting pipe; 8. Circular centering bracket; 9. Sealing bag grouting pipe; 11. Platform; 12. Anchor; 21. Extruder; 22. Cone; 41. Fixing device body; 42. Fastening bolt; 43. Anchor bolt sleeve groove; 51. Limiting pin; 52. Spring; 800. Equipment for recyclable prestressed anchor bolt structure; 801. Processor; 802. Memory; 803. Multimedia component; 804. I / O interface; 805. Communication component. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals 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. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In deep foundation pit support, slope reinforcement, temporary support for underground engineering, and other applications, anchor structures must simultaneously withstand high prestressed loads and meet the requirements for later recyclability to reduce obstacles to underground space development and material waste. However, in actual construction and service, existing thermoplastic anchors often experience problems such as failure in recycling operations or a significant decrease in efficiency due to the easy breakage of the energized thermoplastic conductor and the long time required for the thermoplastic process. Furthermore, the thermoplastic filling material can only simply fill the duct and cannot synergistically enhance the anchoring force, resulting in insufficient anchoring performance. At the same time, the thermoplastic forming area is prone to becoming a weak zone of stress concentration, weakening the overall load-bearing capacity. While traditional mechanical anchors avoid the problem of thermoplastic failure, their unlocking mechanisms often rely on auxiliary cable pulling or complex internal structures, which not only increases the additional auxiliary cable laying process, but also makes the contact surface prone to slippage or jamming under tension and locking conditions. During recycling, the coordination between axial pushing and radial retraction is poor, often resulting in untimely reset of the limit component and incomplete unlocking, leading to high recycling pull resistance, difficulty in extracting the reusable part, and even deformation of the rod or damage to the fixing structure. This combination of factors has led to problems such as insufficient overall reliability of anchor bolts, low efficiency of on-site recycling construction, and limited support bearing capacity.

[0030] Example 1:

[0031] This embodiment provides a recyclable prestressed anchor structure, the structure comprising:

[0032] like Figure 1 As shown, the reuse part includes an anchor structure 1 and an unlocking mechanism 2. The bottom end of the anchor structure 1 is connected to the top end of the unlocking mechanism 2 through a limiting partition 3.

[0033] The retention section includes a fixing structure 4, which is sleeved on the outer periphery of the unlocking mechanism 2. The fixing structure 4 has a radially penetrating limit pin mounting hole on its side wall. A limit component 5 is slidably installed in the limit pin mounting hole. One end of the limit component 5 extends into the cavity of the fixing structure 4 and abuts against the unlocking mechanism 2. In the tensioned and locked state, the contact area between the unlocking mechanism 2 and the limit component 5 is planar, forming an axial mechanical engagement structure. When recycling is required, the prestress of the anchor rod structure 1 is released, and the anchor rod structure 1 is pushed towards the bottom of the hole. The limit partition 3 drives the unlocking mechanism 2 to move down and squeeze the limit component 5 to retract radially, releasing the mechanical engagement. When the unlocking mechanism 2 moves to the bottom of the limit component 5, it pulls the anchor rod structure 1 upward to extract the reuse section and complete the recycling. In this step, the limiting partition 3 is rigidly connected to the anchor structure 1. The unlocking mechanism 2 slides axially along the outer wall of the anchor structure 1, and the limiting partition 3 acts as a mechanical stop to restrict the upward displacement of the unlocking mechanism 2. A platform 11 and an anchor 12 are provided at the top of the anchor structure 1, both extending out of the drill hole. The platform 11 and the anchor 12 are used for prestressed tensioning and locking. The fixing structure 4 encloses the bottom of the unlocking mechanism 2.

[0034] When the anchor bolt is in the tensioned and locked state, the bottom horizontal annular surface of the unlocking mechanism 2 is in contact with the inner top surface of the limiting component 5. The limiting component 5 symmetrically clamps the bottom of the unlocking mechanism 2 in the radial direction, forming an axial pressure-bearing mechanical interlocking structure. The tension load is transmitted to the unlocking mechanism 2 through the anchor bolt structure 1, and then the plane of the unlocking mechanism 2 presses the limiting component 5 to distribute the load to the outer fixed structure 4.

[0035] When unlocking and recycling are required, the platform 11 and the anchor 12 are removed, the tension prestress inside the anchor structure 1 is slowly released, the axial tensile stress of the rod is eliminated, and the clamping load between the unlocking mechanism 2 and the limiting component 5 is released. The anchor structure 1 is hammered and pushed towards the bottom of the hole along the borehole axis. The limiting partition 3, which is rigidly connected to the anchor structure 1, also moves downwards simultaneously. The lower end face of the limiting partition 3 presses against the unlocking mechanism 2, causing the unlocking mechanism 2 to slide smoothly downwards along the anchor structure 1. During the downward movement, the slope continuously squeezes the inner arc head of the limiting component 5, forcing the limiting component 5 to slide outwards radially and retract, disengaging from the planar contact surface with the bottom of the cone. After the unlocking mechanism 2 moves down and passes under the limiting component 5, the limiting component 5 automatically springs back into place under the action of the internal spring, releasing the mechanical engagement. The anchor structure 1 is then pulled upwards, and the reusable part can be extracted from the fixed structure 4, completing the anchor recycling work.

[0036] like Figure 2 As shown, the unlocking mechanism 2 includes a squeezer 21 and a cone 22. The top of the cone 22 is threadedly connected to the bottom of the anchor structure 1. The squeezer 21 is slidably sleeved on the anchor structure 1 and is located below the limiting partition 3. A through internal threaded hole is opened in the center of the cone 22, and the cone 22 is connected to the threaded section of the anchor structure 1. The upper part of the cone 22 is a straight cylindrical section, and the lower part expands outward to form a horizontal annular pressure-bearing bottom surface. The bottom surface is a machined plane for engaging with the plane of the limiting component 5. The outer contour of the bottom end of the cone 22 is a rounded transition, which smoothly pushes open the rebounding limiting component 5 when pulled out, reducing the pull-out resistance. The extruder 21 is a hollow frustoconical sleeve structure. The smooth through-hole inner diameter of the extruder 21 is clearance-fitted with the smooth circular section outer diameter of the anchor rod structure 1. The extruder 21 can slide freely axially along the smooth circular section. The extruder 21 is fixed directly below the limiting partition 3 and outside the upper cylindrical section of the cone 22. The outer diameter of the limiting partition 3 is larger than the inner diameter of the central through-hole of the extruder 21, forming an upward upper limit stop. The extruder can only be pushed downward through the limiting partition 3 and cannot be disengaged from the rod body upward.

[0037] To clarify the specific structure of the anchor bolt structure 1, the anchor bolt structure 1 has a threaded section and a smooth circular section. The bottom of the threaded section connects to the top of the smooth circular section, and the bottom of the smooth circular section connects to the unlocking mechanism 2. The smooth circular section slides smoothly against the unlocking mechanism 2 and presses against the limiting component 5. In this structure, the smooth circular section serves as a sliding guide rail for the extruder 21, ensuring that when the extruder is pushed by the limiting baffle 3, it translates purely axially along the rod body without circumferential rotation or radial offset. Furthermore, the effective sliding length of the smooth circular section is greater than the maximum moving distance required for the extruder 21 to press against the limiting component 5 downwards, ensuring that the extruder can pass over the bottom surface of the limiting component after complete unlocking.

[0038] Preferably, the fixing structure 4 is a split structure, either split in half or in three parts.

[0039] like Figures 2 to 4 As shown, the fixing structure 4 includes a fixing body 41 and fastening bolts 42. The fixing body 41 has bolt holes, and the fastening bolts 42 are disposed in the bolt holes, locking and fixing the fixing body 41. In this invention, the side wall of the fixing body 41 has symmetrically arranged radially penetrating limit pin mounting holes. Limiting components 5 are slidably installed in the limit pin mounting holes. After the fastening bolts 42 are inserted into the bolt holes and tightened, the fixing structure 4 is clamped, ensuring a tight fit between the shell splice gaps, preventing the shell from opening or deforming under tension loads, and maintaining the radial telescopic track accuracy of the limit components.

[0040] In this invention, the limiting component 5 includes a limiting pin 51. The upper part of the outwardly extending end of the limiting pin 51 is arc-shaped, and the arc end is pressed and engaged with the unlocking mechanism 2. A spring 52 is provided at the middle of one end of the limiting pin 51 in the cavity of the fixing structure 4. When the limiting pin 51 is compressed and retracts radially, it disengages from the extruder of the unlocking mechanism 2, and the spring 52 drives the limiting pin 51 to spring back to the initial working position. The lower side of the inner end of the limiting pin 51 is a horizontal plane, which fits and engages with the bottom plane of the cone 22 when tensioned. When the extruder 21 moves down and compresses the limiting pin 51 to retract outward, the spring 52 is compressed and stores energy. After the spring 52 moves down past the limiting pin 51, the spring 52 springs back and pushes the limiting pin 51 to reset inward, restoring the initial clamping position.

[0041] like Figure 5 As shown, the limiting pin 51 has an upper root shaft, a middle root shaft, and a lower root shaft on its inner side. A spring 52 is sleeved on the outside of the middle root shaft. The upper end of the spring 52 abuts against the upper root shaft, and the lower end of the spring 52 abuts against the lower root shaft. The root shafts and the lower root shaft guide and limit the limiting pin 51. Furthermore, the root shafts and the lower root shaft restrict the limiting pin 51 to slide only in a radial straight line, preventing the limiting pin 51 from circumferentially deflecting, tilting, or jamming during tensioning and retraction, thus ensuring stable telescopic movement.

[0042] In this structure, the retention part further includes an anchor sleeve 6. The top of the fixing structure 4 has an anchor sleeve groove 43. The anchor sleeve 6 is snapped and fixed within the anchor sleeve groove 43. The anchor sleeve 6 is fixedly connected to the fixing structure 4 through a sealing layer. The top of the fixing structure 4 has an anchor sleeve groove 43, within which the anchor sleeve 6 is sealed and embedded. The anchor sleeve 6 wraps around the rod body of the anchor structure 1, isolating the grout from the anchor rod body and preventing the grout from solidifying and encasing the reusable part, thus preventing obstruction during recycling.

[0043] The outer wall of the anchor sleeve 6 is respectively bound with an anchor body grouting pipe 7 and a sealing bag grouting pipe 9: the anchor body grouting pipe 7 extends to the bottom of the borehole 30~50cm, and the anchoring grout is injected using the bottom return grouting process, and the grout wraps the fixed structure 4 to form a permanent anchor body; the sealing bag grouting pipe 9 is bound to the upper part of the anchor sleeve 6 near the borehole opening, and the sealing bag grouting pipe 9 is matched with the borehole opening sealing bag. After the anchor is pulled out, cement mortar is injected into the borehole through the sealing bag grouting pipe 9 to seal the borehole, fill the borehole gaps, and seal the seepage channels of the surrounding rock.

[0044] In this invention, an annular centering bracket 8 is provided in the middle of the anchor bolt structure 1. The annular centering bracket 8 is arranged at equal intervals along the axial direction of the anchor bolt structure 1, and the outer diameter of the annular centering bracket 8 is smaller than the inner diameter of the anchor bolt sleeve 6. The annular centering bracket 8 centrally supports the anchor bolt structure 1 inside the anchor bolt sleeve 6, restricting the radial deviation of the anchor bolt structure 1 within the sleeve, preventing the clamp 21 from being blocked by force on one side, and ensuring smooth sliding, unlocking, and retraction of the anchor bolt.

[0045] It should be noted that the specific methods by which each module performs its operations in the above embodiments have been described in detail in the embodiments of the method, and will not be elaborated here.

[0046] Example 1:

[0047] This embodiment provides a construction method for a recyclable prestressed anchor structure.

[0048] See Figure 6 The figure shows that the method includes steps S1 to S5, including:

[0049] S1: Mark the drilling position and drill to the preset depth;

[0050] In this step, the anchor bolt drilling points are marked according to the support design drawings. Special anchor bolt drilling equipment is used to drill the holes to the designed preset depth, and the floating debris and accumulated water in the holes are cleaned.

[0051] S2: Assemble the anchor bolt structure 1, unlocking mechanism 2, limiting baffle 3, fixing structure 4 and limiting component 5, and set the anchor solid grouting pipe 7 on the outer wall of the anchor bolt structure 1 to form the anchor bolt assembly;

[0052] To clarify the specific steps for obtaining the anchor bolt assembly, the following steps are required:

[0053] The bottom end of the anchor structure 1 is integrally machined with the external thread section of the matching tapered body 22 and the adjacent smooth circular section. The annular centering bracket 8 is welded at equal intervals along the axial direction of the anchor structure 1, and the oil and rust on the rod body are ground and removed and rust prevention treatment is performed.

[0054] The limiting partition 3 is fixed to the upper part of the smooth circular section of the anchor rod structure 1, the extruder 21 is sleeved on the smooth circular section of the anchor rod structure 1 and located below the limiting partition 3, and the cone 22 is rigidly connected to the bottom threaded section of the anchor rod structure 1 to form a reusable anchor rod.

[0055] The fastening bolt 42 and the limiting pin 51 are installed into the radial mounting hole on the side wall of the fixed structure 4 to form a limiting assembly. The fixed structure 4 is locked in place by the fastening bolt 42. Waterproof sealant is evenly applied to the inner wall of the anchor sleeve groove 43 integrally formed on the top of the fixed structure 4. The bottom end of the anchor sleeve 6 is snapped into the inside of the anchor sleeve groove 43 and left to stand until the sealant is completely cured. The sealant is used to isolate the grouting slurry and prevent cement slurry from seeping into the internal cavity of the fixed structure 4 to solidify the limiting assembly.

[0056] An anchor bolt assembly is formed by binding the anchor solid grouting pipe 7 and the sealing bag grouting pipe 9 to the outer wall of the anchor bolt sleeve 6.

[0057] To clarify the specific acquisition operations after the anchor bolt assembly, the following are included:

[0058] Waterproof sealant is applied to the inner wall of the anchor sleeve groove 43 opened in the fixed structure 4. The anchor sleeve 6 is then snapped and fixed in the anchor sleeve groove 43. After the sealant has cured, an anchor grouting pipe 7 is installed on the outer wall of the anchor sleeve 6, and the grout outlet of the anchor grouting pipe 7 extends to the bottom of the borehole.

[0059] S3: Lower the anchor bolt assembly along the borehole to the designed depth, keeping the anchor bolt axis aligned with the borehole axis during the lowering process;

[0060] In this step, the anchor bolt assembly is pushed into the borehole, and the lowering speed is controlled to be uniform. The annular centering bracket 8 supports and limits the movement, ensuring that the axis of the anchor bolt structure 1 is completely aligned with the borehole design inclination angle and axis, in order to prevent the bolt body from touching the borehole wall and the casing from bending and deforming.

[0061] S4: Grout the bottom of the anchor grouting pipe 7 until grout overflows from the hole opening and then stop grouting;

[0062] To clarify the specific procedures for obtaining grout at the bottom of the borehole, the following are included:

[0063] The specific method of bottom hole grouting includes: maintaining a low speed and stable pressure during grouting, continuously injecting grout from bottom to top until the grout returning from the hole is free of air bubbles and is pure cement grout, at which point grouting is stopped.

[0064] S5: After the grout reaches the preset strength, the anchor structure 1 is prestressed and tensioned, and the prestress loss state is locked.

[0065] In this step, after the grout reaches the preset strength, a platform 11 and an anchor 12 are erected on the anchor structure 1, and a stress measuring instrument is installed accordingly.

[0066] Prestress is applied according to the preset grade requirements. The deformation and stress reading of the rod are observed at each load level until the design tension control stress is reached. The prestress loss value is continuously monitored after 24 hours of static pressure stabilization.

[0067] When the 24-hour prestress loss is ≤ 10% of the design tension: directly tighten the anchor 12 to complete the locking, and the platform 11 is used to bear the lateral earth pressure of the support;

[0068] When the 24-hour prestress loss is greater than 10% of the design tension, compensatory tensioning is carried out, and the tension load is increased to 1.1 times the original design tension. After stabilization, the tension is re-locked to reduce the risk of deformation of the support in the later stage.

[0069] S6: After the temporary support is completed, release the prestress, axially hammer the limiting partition 3 to push the unlocking mechanism 2 to compress the limiting component 5 and retract radially, pull out the reusable part of the anchor bolt assembly and grout the borehole to seal it.

[0070] Example 3:

[0071] Corresponding to the above construction method embodiments, this embodiment also provides a device for recyclable prestressed anchor structures. The device for recyclable prestressed anchor structures described below and the construction method for recyclable prestressed anchor structures described above can be referred to in correspondence.

[0072] Figure 7 This is a block diagram illustrating a recyclable prestressed anchor structure device 800 according to an exemplary embodiment. Figure 7 As shown, the device 800 for the recyclable prestressed anchor structure may include a processor 801 and a memory 802. The device 800 may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0073] The processor 801 controls the overall operation of the recyclable prestressed anchor structure device 800 to complete all or part of the steps in the aforementioned construction method for the recyclable prestressed anchor structure. The memory 802 stores various types of data to support the operation of the recyclable prestressed anchor structure device 800. This data may include, for example, instructions for any application or method operating on the recyclable prestressed anchor structure device 800, as well as application-related data such as contact data, sent and received messages, images, audio, video, etc. The memory 802 can be implemented using any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 802 or transmitted via the communication component 805. The audio component also includes at least one speaker for outputting audio signals. I / O interface 804 provides an interface between processor 801 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons can be virtual or physical. Communication component 805 is used for wired or wireless communication between the recyclable prestressed anchor structure device 800 and other devices. Wireless communication includes, for example, Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination thereof. Therefore, the corresponding communication component 805 may include a Wi-Fi module, a Bluetooth module, or an NFC module.

[0074] In an exemplary embodiment, the device 800 for recyclable prestressed anchor structures may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the construction method for the recyclable prestressed anchor structures described above.

[0075] Example 4:

[0076] Corresponding to the above construction method embodiments, this embodiment also provides a medium. The medium described below can be referred to in conjunction with the construction method of the recyclable prestressed anchor structure described above.

[0077] A medium storing a computer program, which, when executed by a processor, implements the steps of the construction method for the recyclable prestressed anchor structure described in the above method embodiments.

[0078] The medium can specifically be any medium capable of storing program code, such as a USB flash drive, external hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A recyclable prestressed anchor structure, characterized in that, include: The reusable part includes an anchor structure (1) and an unlocking mechanism (2), wherein the bottom end of the anchor structure (1) is connected to the top end of the unlocking mechanism (2) through a limiting partition (3); The retention part includes a fixing structure (4), which is sleeved on the outer periphery of the unlocking mechanism (2). The side wall of the fixing structure (4) has a radially penetrating limit pin mounting hole. A limit component (5) is slidably installed in the limit pin mounting hole. One end of the limit component (5) extends into the cavity of the fixing structure (4) and abuts against the unlocking mechanism (2). In the tensioned locking state, the contact part between the unlocking mechanism (2) and the limit component (5) is a plane, forming an axial mechanical engagement structure. When recycling is required, the prestress of the anchor rod structure (1) is released, and the anchor rod structure (1) is pushed towards the bottom of the hole. The limit partition (3) drives the unlocking mechanism (2) to move down and squeeze the limit component (5) to retract radially, releasing the mechanical engagement. When the unlocking mechanism (2) moves to the bottom of the limit component (5), it pulls the anchor rod structure (1) upward to extract the reuse part and complete the recycling.

2. The recyclable prestressed anchor structure according to claim 1, characterized in that, The unlocking mechanism (2) includes a squeezer (21) and a cone (22). The top of the cone (22) is threadedly connected to the bottom of the anchor structure (1). The squeezer (21) is slidably sleeved on the anchor structure (1) and is located below the limiting partition (3).

3. The recyclable prestressed anchor structure according to claim 1, characterized in that, The fixed structure (4) is a split structure, either split in half or in three parts.

4. The recyclable prestressed anchor structure according to claim 1, characterized in that, The limiting component (5) includes a limiting pin (51). The upper part of the end of the limiting pin (51) extending outward is set in an arc shape. The arc end is squeezed and engaged with the unlocking mechanism (2). A spring (52) is provided in the middle of one end of the cavity of the fixed structure (4). When the limiting pin (51) is squeezed and retracts radially, it disengages from the extruder of the unlocking mechanism (2). The spring (52) drives the limiting pin (51) to spring back to the initial working position.

5. The recyclable prestressed anchor structure according to claim 4, characterized in that, The limiting pin (51) is provided with an upper root shaft, a middle root shaft and a lower root shaft on its inner side. A spring (52) is sleeved on the outside of the middle root shaft. The upper end of the spring (52) abuts against the upper root shaft and the lower end of the spring (52) abuts against the lower root shaft. The root shaft and the lower root shaft guide and limit the limiting pin (51).

6. The recyclable prestressed anchor structure according to claim 1, characterized in that, The retention part also includes an anchor sleeve (6), and the top of the fixing structure (4) is provided with an anchor sleeve groove (43). The anchor sleeve (6) is snapped and fixed in the anchor sleeve groove (43). The anchor sleeve (6) is fixedly connected to the fixing structure (4) through a sealing layer.

7. The recyclable prestressed anchor structure according to claim 1, characterized in that, The anchor structure (1) is provided with an annular centering bracket (8) in the middle. The annular centering bracket (8) is arranged at equal intervals along the axial direction of the anchor structure (1), and the outer diameter of the annular centering bracket (8) is smaller than the inner diameter of the anchor sleeve (6).

8. A construction method for a recyclable prestressed anchor structure, characterized in that, The recyclable prestressed anchor structure as described in any one of claims 1-8 is used, comprising: Mark the drilling position and drill to the preset depth; Assemble the anchor bolt structure (1), unlocking mechanism (2), limiting baffle (3), fixing structure (4) and limiting component (5), and set the anchor solid grouting pipe (7) on the outer wall of the anchor bolt structure (1) to form the anchor bolt assembly; The anchor bolt assembly is lowered along the borehole to the designed depth, and the anchor bolt axis is kept aligned with the borehole axis during the lowering process. Grouting is performed at the bottom of the anchor grouting pipe (7) until grout overflows from the hole and then grouting is stopped. After the grout reaches the preset strength, the anchor structure (1) is prestressed and tensioned, and the prestress loss state is locked. After the temporary support is completed, the prestress is released, the limiting partition (3) is hammered axially to push the unlocking mechanism (2) to compress the limiting component (5) and retract radially, the reusable part of the anchor bolt assembly is pulled out and the borehole is grouted and sealed.

9. The construction method of the recyclable prestressed anchor structure according to claim 8, characterized in that, Following the anchor bolt assembly, including: Waterproof sealant is applied to the inner wall of the anchor sleeve groove (43) opened in the fixed structure (4), and the anchor sleeve (6) is snapped and fixed in the anchor sleeve groove (43). After the sealant is cured, an anchor grouting pipe (7) is set on the outer wall of the anchor sleeve (6), and the grout outlet of the anchor grouting pipe (7) extends to the bottom of the borehole.

10. The construction method of the recyclable prestressed anchor structure according to claim 8, characterized in that, The specific method of bottom hole grouting includes: maintaining a low speed and stable pressure during grouting, continuously injecting grout from bottom to top until the grout returning from the hole is free of air bubbles and is pure cement grout, at which point grouting is stopped.

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