Anchor rod neck protection assembly, anchor rod and construction method

Abstract

This invention provides an anchor neck protection component, including a protective sleeve. The protective sleeve is used to cover and surround the anchor neck section, allowing the anchor neck section to move freely within the sleeve. The upper end of the protective sleeve is fixedly connected to the anchor head section of the anchor, moving synchronously with the anchor head section. The lower end of the protective sleeve engages with the section inside the anchor hole, ensuring that the anchor neck section is always surrounded by the protective sleeve as its upper end moves synchronously with the anchor head section. This invention also provides an anchor with the above-mentioned protective component and a construction method. When the anchor uses the protective component of this invention, the anchor neck remains isolated from the external environment under the protection of the protective sleeve when the anchor deforms or shifts, effectively solving the corrosion problem of the anchor neck, achieving comprehensive protection of the anchor neck, enhancing the overall protective effect of the anchor, and improving the anchor's load-bearing capacity, reliability, and durability.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt corrosion protection technology, and in particular to an anchor bolt neck protection component, an anchor bolt having the anchor bolt neck protection component, and a construction method thereof. Background Technology

[0002] Anchor bolts are a common structure in geotechnical engineering. They are tension members and systems anchored in the ground to transfer the loads of external structures to the ground, thus maintaining the stability of the external structures. Because the soil and water in the ground are corrosive to anchor bolts, corrosion prevention is an important issue. Figure 1A-1B This is a schematic diagram of an anti-buoyancy anchor. In the diagram, point a is the apex of the anchor rod 1, point b is the intersection of the anchor rod 1 and the bottom surface of the external structure 2 (shown in the attached diagram as the basement floor slab), and point d is the bottom of the anchor rod 1. In existing technology, an isolation pipe 9 is typically installed on the anchor rod section bd to isolate it from the groundwater and soil, thus achieving corrosion prevention. However, in actual use, anchor rods with the above structure are still subject to erosion by groundwater and soil after a period of use, leading to reduced load-bearing capacity and difficulty in effectively guaranteeing durability and load-bearing capacity. Summary of the Invention

[0003] The present invention first provides a protective component for the neck of an anchor bolt to solve the problem of anchor bolt corrosion.

[0004] The present invention provides an anchor neck protection assembly, comprising a protective sleeve, which is used to cover and surround the anchor neck section and allow the anchor neck section to move freely within the protective sleeve. The upper end of the protective sleeve is fixedly connected to the anchor head section of the anchor rod so as to move synchronously with the anchor head section. The lower end of the protective sleeve is engaged with the inner section of the anchor rod, so that the protective sleeve always surrounds the anchor neck section when its upper end moves synchronously with the anchor head section.

[0005] Specifically, the protective sleeve is a sleeve with a connecting part at the upper end for connecting with the anchor head section rod body, so that the upper end of the sleeve moves synchronously with the anchor head section rod body; the lower end of the sleeve is open for slidingly fitting into the hole section and moving synchronously with the anchor head section in the hole section.

[0006] Optionally, the fitting length between the lower end of the sleeve and the inner section of the hole is greater than the maximum design displacement value of the anchor head section rod.

[0007] Optionally, a sealing ring is also provided on the inner side of the lower end of the sleeve to seal the gap between the inner wall of the lower end of the sleeve and the inner section of the hole.

[0008] Specifically, the protective sleeve is a telescopic sleeve, the upper end of which is connected to the anchor head section rod body through the connecting part, so that the upper end of the protective sleeve moves synchronously with the anchor head section rod body; the lower end of the telescopic sleeve is open for fitting into the hole section and fixing it.

[0009] Optionally, the telescopic sleeve is a piston-type telescopic sleeve, which includes an upper sleeve and a lower sleeve. The upper sleeve is telescopically embedded inside the lower sleeve. The connecting part is provided at the upper end of the upper sleeve, so that the upper sleeve is fixedly connected to the anchor head section rod body through the connecting part, and the upper sleeve moves synchronously with the anchor head section rod body. The lower end of the lower sleeve is fitted into the hole section and fixed.

[0010] Optionally, the lower end of the lower sleeve has a connecting sealing part, so that the inner wall of the lower end of the lower sleeve is connected and sealed with the inner section of the hole.

[0011] Optionally, the lower outer side of the upper sleeve is provided with an anti-detachment lug, and the upper end of the lower sleeve is provided with a stop ring. The inner diameter of the stop ring is smaller than the outer diameter of the anti-detachment lug. When the upper sleeve moves upward with the anchor head section rod, the stop ring is used to restrict the upper sleeve from being pulled out of the lower sleeve.

[0012] Optionally, the telescopic sleeve is a flexible telescopic sleeve, the upper end of which is fixedly connected to the anchor head section rod body by a fastener, so that the upper end of the flexible telescopic sleeve moves synchronously with the anchor head section rod body, and the lower end of the flexible telescopic sleeve is sleeved and fixed in the hole section.

[0013] Optionally, it also includes an outer sleeve for being fitted over the flexible telescopic sleeve, the upper end of the outer sleeve having a connecting part for fixing the upper end of the outer sleeve to the anchor head section rod body.

[0014] The anchor neck protection component provided by this invention is installed on the anchor neck section. When the anchor is placed in the anchor hole, the protective sleeve on the component can move synchronously with the anchor head section. The lower end of the protective sleeve is always located inside the anchor hole. This ensures that as the anchor neck section repeatedly extends and retracts at the anchor hole opening, the protective sleeve always surrounds the anchor neck section. While the protective sleeve protects the anchor neck section, the anchor rod can move freely within the sleeve, allowing the neck to extend from the anchor hole and be protected by the sleeve without being exposed to groundwater. When the rod retracts into the anchor hole, it can move freely within the sleeve without hindering its retraction. Thus, regardless of whether it is the wet or dry season, whether the external structure is in contact with or separated from the ground surface, or whether the anchor is stationary or moving, the anchor neck section is always isolated from the external environment under the protection of the component, fundamentally solving the problem of groundwater erosion of the anchor neck during anchor displacement.

[0015] The present invention also provides an anchor bolt, wherein the anchor bolt neck is fitted with the above-mentioned anchor bolt neck protection component.

[0016] Optionally, the space between the protective sleeve and the anchor rod body in the protective assembly is filled with a fluid or plastic protective material.

[0017] Optionally, an isolation tube is sleeved on the bore section of the anchor rod; when the protective sleeve in the protective assembly is a sleeve, the lower end of the sleeve is slidably sleeved on the isolation tube in the bore section and moves synchronously with the anchor head section rod in the bore section; or when the protective sleeve in the protective assembly is a telescopic sleeve, the lower end of the telescopic sleeve is sleeved on the isolation tube in the bore section and fixed.

[0018] The anchor bolt provided by this invention effectively solves the problem of anchor bolt neck corrosion caused by groundwater and soil erosion when the anchor bolt is displaced due to the installation of a protective component on the anchor bolt neck section. This achieves comprehensive protection of the anchor bolt neck, enhances the overall protective effect of the anchor bolt, and improves the anchor bolt's load-bearing capacity, reliability, and durability.

[0019] The present invention also provides a method for constructing an anchor bolt, comprising the following steps:

[0020] The protective sleeve of the above-mentioned protective assembly is fitted onto the neck of the anchor bolt, and the upper end of the protective sleeve is fixedly connected to the rod body of the anchor head section.

[0021] The lower end of the protective sleeve is fitted and connected to the rod body inside the hole;

[0022] Place the anchor rod in the designed position inside the anchor hole.

[0023] The present invention also provides another method for constructing anchor bolts, comprising the following steps:

[0024] The isolation tube is fitted onto the section of the anchor rod inside the hole;

[0025] The protective sleeve of the above-mentioned protective assembly is fitted onto the anchor neck, and the upper end of the protective sleeve is fixedly connected to the rod body of the anchor head section.

[0026] The lower end of the protective sleeve is fitted and connected to the isolation tube in the inner section of the hole;

[0027] Place the anchor rod in the designed position inside the anchor hole.

[0028] The construction method of the anchor bolt with the anchor bolt neck protection component of the present invention allows the protection component to be installed directly on site. The operation process is simple, easy, convenient and reliable. Attached Figure Description

[0029] Figure 1A-1BSchematic diagram of the geological conditions after installation of existing anchor bolts;

[0030] Figure 2A-2B Schematic diagram 2 showing the geological conditions after installation of existing anchor bolts;

[0031] Figures 3A-3B These are schematic diagrams of the structure of Embodiment 1 and Embodiment 9 of the anchor neck protection component of the present invention;

[0032] Figures 4A-4B This is a schematic diagram of the structure of Embodiment 2 of the anchor neck protection component of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the anchor neck protection component of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of Embodiment 4 of the anchor neck protection component of the present invention;

[0035] Figure 7 These are schematic diagrams of the fifth and tenth embodiments of the anchor neck protection component of the present invention.

[0036] Figures 8A-8B This is a schematic diagram of the structure of Embodiment Six of the Anchor Neck Protection Assembly of the present invention;

[0037] Figure 9 These are schematic diagrams of the seventh embodiment of the anchor neck protection component and the eleventh embodiment of the anchor bolt of the present invention;

[0038] Figures 10A-10B These are schematic diagrams of the eighth embodiment of the anchor neck protection component and the twelfth embodiment of the anchor bolt of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] Definitions:

[0041] Anchor head section: The section of the anchor rod that protrudes outside the anchor hole and is located in the external structure. The anchor head section shown in the attached drawings of this application is the rod of section ab.

[0042] Anchor neck section: The section of the anchor bolt that is pulled out of the anchor hole when the external structure moves upward. The anchor neck section shown in the attached drawings of this application is section bc, whose length is equal to the maximum design displacement of the anchor head section and can be determined by engineering design calculations. In engineering design, the length of the anchor neck section is mostly around 4 cm.

[0043] The anchor neck section, also known as the movable section, changes with the external structure. When the external structure is in contact with the ground surface, it is located inside the anchor hole. When the external structure moves upward, it is pulled out of the anchor hole, exhibiting the characteristic of repeated back-and-forth movement.

[0044] In-hole section: The section of the anchor rod that remains within the anchor hole as the external structure moves upward. The in-hole section shown in the attached drawings of this application is section cd.

[0045] See Figure 1A-Figure 2B In existing anti-buoyancy anchors, the anchor head section 101 (i.e., section ab) extends into the external structure 2 and is bonded and solidified with the concrete of the external structure 2. After years of investigation, research, and mechanical analysis, the inventors discovered that during the high-water season, the external structure 2 (i.e., the basement floor slab) is subjected to buoyancy and will displace upwards by h. The external structure 2 will move upwards from its original position, forming a gap 4 between itself and the ground stratum 3. The distance it moves is... Figure 1B , Figure 2B At the height h shown, water in stratum 3 will fill the gap 4. Since the anchor head section 101 is integrated with the external structure 2 (if an isolation pipe 9 is installed on the anchor body, the anchor head section 101 cannot be fitted with the isolation pipe 9), when the external structure 2 moves upward, the point b at the intersection of the anchor head section 101 on the anchor body 10 and the bottom surface of the external structure 2 (see...) Figure 1B and Figure 2B The anchor rod 10 will move upward by a distance h, extending h length beyond the opening of the anchor hole 6. The anchor rod 10 will then form a junction point c with the surface of the stratum 3, exposing section bc of the anchor rod in the gap 4. Groundwater and soil will erode this exposed section bc. During the dry season, the buoyancy of the external structure 2 decreases, causing it to move downwards. Simultaneously, point b on the anchor rod 10 will move downwards, causing section bc to retract into the anchor hole 6 and rub against it. This damages the anti-corrosion coating or isolation pipe 9 on the anchor rod 10, rendering the anti-corrosion ineffective. Under the cyclical changes in groundwater buoyancy year after year, the anchor rod 10 repeatedly moves up and down, forming a movable section. The section bc repeatedly extends and retracts from the opening of the anchor hole 6, changing with the displacement of the external structure 2, constantly exposing the section bc, which is a major cause of anchor corrosion. For ease of description, we refer to the rod body of section bc as anchor neck section 103. As anchor neck section 103 repeatedly extends or retracts back and forth at the opening of anchor hole 6, the position of point b is constantly changing, which greatly increases the difficulty of corrosion prevention.

[0046] In response to the aforementioned technical problem of anchor corrosion caused by the rod body of the anchor neck section 103 extending out of the anchor hole 6 and retracting or repeatedly extending and retracting as the anchor head section 101 moves, the present invention first provides a protective component for the anchor neck.

[0047] See Figures 3A-10B The anchor neck protection assembly provided by this invention includes a protective sleeve 5, which is used to be fitted onto the rod body of the anchor neck section 103. The upper end of the protective sleeve 5 is fixedly connected to the rod body of the anchor head section 101 of the anchor rod 1. When the anchor rod 1 is displaced, the protective sleeve 5 can move synchronously with the rod body of the anchor head section 101 under the drive of the anchor head section 101. The lower end of the protective sleeve 5 is connected to the inner section 102 of the anchor rod 1, and the lower end of the protective sleeve 5 is located in the inner section 102 of the anchor rod hole. The connection method between the lower end of the protective sleeve 5 and the inner section 102 can be adapted according to the design structure of the protective sleeve 5, so that when the upper end of the protective sleeve 5 is fixedly connected to the rod body of the anchor head section 101 and moves synchronously with the rod body of the anchor head section 101, the lower end of the protective sleeve 5 is always located in the inner section 102 of the anchor rod hole. As the anchor bolt section bc repeatedly extends and retracts at the opening of anchor hole 6, the protective sleeve 5 always surrounds the anchor bolt neck section 103, allowing the anchor bolt neck section 103 to move freely within the protective sleeve 5. While protecting the anchor bolt neck section 103, the protective sleeve 5 does not impede the free movement of the anchor bolt neck section 103 itself. This is because when the isolation tube 9 is fitted onto the anchor bolt body 10, the deformation of the anchor bolt body 10, the cement grout 8, and the isolation tube 9 are not coordinated; the elongation of the anchor bolt body 10 is much greater than that of the cement grout 8 and the isolation tube 9. If the protective sleeve 5 could not allow the anchor bolt body 10 to move freely within it, a new neck would appear below the protective sleeve 5. Figure 2A-2B As shown, when the steel pipe G is bonded to the anchor head section 101 with cement grout to form a whole, and the anchor rod body 10 cannot move freely inside the steel pipe G, Figure 2BPoint b at the lower end of the steel pipe G will detach from the isolation pipe 9 and move upward by a length h. At this time, a junction point c is formed between the top of the isolation pipe 9 and the anchor rod body 10. The rod body segment bc will extend out of the hole of the isolation pipe 9, leaving segment bc exposed without the protection of the steel pipe G. Therefore, the anchor neck protection assembly provided by the present invention connects and fixes the upper end of the protective sleeve 5 to the anchor head segment 101 rod body. As the anchor head segment 101 rod body moves synchronously, the lower end of the protective sleeve 5 is always located in the anchor hole segment 102, always surrounding the anchor neck segment 103 within the protective sleeve 5. While protecting the anchor neck section 103, the anchor rod 10 can move freely within the protective sleeve 5. This allows the anchor neck section 103 to extend directly into the protective sleeve 5 after exiting the anchor hole 6, thus receiving protection from the soil and water. When the anchor rod 10 retracts into the anchor hole 6, its free movement within the protective sleeve 5 does not impede its retraction. This seamless connection and full-range protection are achieved between the anchor rod 10's movement from the anchor hole 6 to its entry into the protective sleeve 5 and vice versa. In this way, regardless of whether it is the wet season or the dry season, whether the external structure 2 is attached to or separated from the surface of the stratum 3, and whether the anchor bolt 1 is stationary or moving, the bolt body of the anchor bolt neck section 103 is always isolated from the external environment under the protection of the protective sleeve 5. This provides comprehensive protection for the bolt body of the anchor bolt neck section 103, effectively preventing the erosion of the anchor bolt 1 by groundwater and soil, and completely solving the problem of reduced overall performance of the anchor bolt 1 caused by corrosion of the anchor bolt neck section 103. This ensures the reliability and anchoring effect of the anchor bolt 1 for long-term use.

[0048] It should be noted that the protective sleeve 5 and the anchor rod body 10 can be freely attached or detached, and can be filled with anti-corrosion lubricating grease. They can move freely, but they cannot be bonded together with cement grout or other adhesive materials.

[0049] Specifically, the protective sleeve 5 is a sleeve structure or a telescopic sleeve structure. The upper end of the protective sleeve 5 has a connecting part 51 located inside the outer structure 2, which is used to fix and connect with the anchor head section 101 of the anchor rod 1, and is embedded in the outer structure 2 together with the anchor head section 101, so that the protective sleeve 5 is fitted on the neck section 103 of the anchor rod. The upper end of the protective sleeve 5 deforms or shifts together with the anchor head section 101, and ensures that it moves synchronously with the movement of the anchor rod 1 when it moves.

[0050] See Figures 3A-10BWhen the protective sleeve 5 is a sleeve structure, the protective sleeve 5 is a sleeve 5A. The upper end of the sleeve 5A is fixedly connected to the anchor head section 101 of the anchor rod 1 through the connecting part 51, so that the sleeve 5A is fitted on the neck section 103 of the anchor rod. The connection methods include: fixing the upper end of the sleeve 5A to the anchor head section 101 by welding, or threading the upper end of the sleeve 5A to the anchor head section 101; or fixing the upper end of the sleeve 5A to the anchor head section 101 by screws; or fixing the upper end of the sleeve 5A to the anchor head section 101 by a thin plate; or fixing the upper end of the sleeve 5A to the anchor head section 101 by an external connector. The lower end of the sleeve 5A has an opening for slidingly fitting onto the bore section 102 of the anchor rod 1. It moves synchronously with the anchor head section 101 within the bore section 102 region. Whether the sleeve 5A is stationary or moving within the bore section 102, it always surrounds the anchor neck section 103, protecting it. Furthermore, a slidable sealing ring 52 is provided on the inner side of the lower end of the sleeve 5A. The sealing ring 52 can slide along with the lower end of the sleeve 5A on the bore section 102. The gap between the inner wall of the lower end of the sleeve 5A and the bore section 102 is sealed to prevent groundwater and soil from seeping in from this location.

[0051] In a specific embodiment, the connecting part 51 is an axial threaded hole 511 provided at the upper end of the sleeve 5A for threaded connection with the anchor head section 101 rod body; or, the connecting part 51 includes at least one threaded hole radially provided on the upper side wall of the sleeve 5A and a set screw 512 screwed into the threaded hole, the set screw 512 being used to abut against the anchor head section 101 rod body, so that the upper end of the sleeve 5A is fixedly connected to the anchor head section 101 rod body; or, the connecting part 51 is provided on the sleeve The upper end of sleeve 5A has a thin plate 56 with a through hole 562, and the thin plate 56 is press-fitted onto the threaded part of the anchor head section 101. Alternatively, the connecting part 51 includes a weld 541 between the upper end of sleeve 5A and the anchor head section 101, and a connecting rod or connecting plate 54. Or, the connecting part includes an external connector at the upper end of sleeve 5A, which connects the upper end of sleeve 5A to the anchor head section 101 as a whole. Of course, sleeve 5A can also be fixedly connected to the anchor head section 101 in other ways, which will not be elaborated here.

[0052] Furthermore, when the protective sleeve 5 is a sleeve 5A, the fitting length of the sleeve 5A and the inner section 102 should be greater than the maximum displacement value of the anchor head section 101 rod. When the sleeve 5A moves with the anchor head section 101 rod, although the lower end of the sleeve 5A moves synchronously in the inner section 102, it will not exceed the inner section 102. It can always ensure that the lower end of the sleeve 5A is always on the inner section 102 when sliding and does not detach from the inner section 102.

[0053] Please see again. Figures 3A-10BWhen the protective sleeve 5 is a telescopic sleeve structure, the telescopic sleeve is fitted onto the anchor neck section 103. The upper end of the telescopic sleeve has a connecting part 514 for connecting with the anchor head section 101 of the anchor rod 1, so that the upper end of the telescopic sleeve moves synchronously with the anchor head section 101. The lower end of the telescopic sleeve is open for fitting onto and fixing to the inner hole section 102 of the anchor rod 1. When the upper end of the telescopic sleeve moves with the anchor head section 101, the telescopic sleeve can extend or shorten without the lower end of the telescopic sleeve moving, so that the lower end of the telescopic sleeve is always fixed in the inner hole section 102, and the telescopic sleeve always surrounds the anchor neck section 103, thus protecting the anchor neck section 103.

[0054] In a specific embodiment, the telescopic sleeve is a piston-type telescopic sleeve, which includes an upper sleeve 5B and a lower sleeve 7, both of which are fitted onto the anchor neck section 103. The upper sleeve 5B is simultaneously telescopically embedded within the lower sleeve 7. The connecting part 514 is located at the upper end of the upper sleeve 5B, and the upper sleeve 5B is fixedly connected to the anchor head section 101 through the connecting part 514, allowing the upper sleeve 5B to move synchronously with the anchor head section 101. The lower sleeve 7 has an open lower end and is fitted onto and fixed within the bore section 102 of the anchor rod. The upper sleeve 5B can move up and down within the cavity of the lower sleeve 7 as the anchor head section 101 moves, ensuring that the upper sleeve 5B and the lower sleeve 7 always surround the anchor neck section 103, thus protecting the anchor neck section 103. The overlap length of the upper sleeve 5B and the lower sleeve 7 should not be less than the maximum possible displacement value of the anchor head section 101 rod body, so that there is no breakage or separation between the two, and that the anchor neck section 103 is always surrounded by the telescopic sleeve.

[0055] Furthermore, the lower end of the lower sleeve 7 has a connecting sealing part, so that the inner wall of the lower end of the lower sleeve 7 is connected and sealed with the inner section 102 of the hole to prevent groundwater and soil from seeping in from the gap at this location.

[0056] The connecting sealing part at the lower end of the lower sleeve 7 can be a base plate 72 provided at the lower end of the lower sleeve 7, the base plate 72 having a sealing connection hole in the center for sealing connection with the inner section 101; or, a sealing connection cylinder 74 is provided extending downward along the center hole of the base plate 72 at the lower end of the lower sleeve 7, the sealing connection cylinder 74 being used for sealing connection with the inner section 102; or, a cloth sleeve is fixedly fitted at the lower end of the lower sleeve 7, the other end of the cloth sleeve being fitted onto the inner section 102 and tightened for sealing.

[0057] An anti-detachment lug 513 may be provided outwardly on the outer side of the lower end of the upper sleeve 5B, and a stop ring 73 is provided at the upper end of the lower sleeve 7, such that the inner diameter of the stop ring 73 is smaller than the outer diameter of the anti-detachment lug 513. When the upper sleeve 5B moves upward with the anchor head section 101 rod, the stop ring 513 is used to restrict the anti-detachment lug 513 and prevent the upper sleeve 5B from being pulled out of the lower sleeve 7.

[0058] In a specific embodiment, the telescopic sleeve can also be a flexible telescopic sleeve 5C that expands and contracts with the vertical displacement of the anchor head section 101. The upper end of the flexible telescopic sleeve 5C has a connecting part that is a fixing member, which is fixedly connected to the rod body of the anchor head section 101, so that the upper end of the flexible telescopic sleeve 5C moves synchronously with the anchor head section 101. The lower end of the flexible telescopic sleeve 5C is fixedly connected to the rod body of the hole section 101 through another fixing member. The flexible telescopic sleeve 5C can extend or shorten with the movement of the anchor head section 101, so that the flexible telescopic sleeve 5C always surrounds the anchor neck section 103 and protects the anchor neck section 103. The extension of the flexible telescopic sleeve 5C is not less than the maximum possible displacement value of the anchor head section 101, so that the flexible telescopic sleeve 5C does not break and ensures that the anchor neck section 103 is always surrounded by the flexible telescopic sleeve 5C.

[0059] The flexible telescopic sleeve 5C can be a corrugated pipe, an elastic rubber sleeve, or an axially foldable and elongated cloth sleeve. The fixing component is a hose clamp, binding wire, or buckle. Of course, the flexible telescopic sleeve 5C can also be other telescopic sleeves that can be freely extended or shortened, and the fixing component can also be other components, which will not be elaborated here.

[0060] In a specific embodiment, the protective sleeve 5 can also be a combination of an outer sleeve 5D and a flexible telescopic sleeve 5C. The outer sleeve 5D has a structure similar to that of the sleeve 5A, with a connecting part at its upper end for fixing the upper end of the outer sleeve 5D to the anchor head section 101 rod body, and its lower end slidingly fitted onto the inner hole section 102, and moving synchronously with the anchor head section in the area of ​​the inner hole section 102, thus providing double protection for the anchor neck section 103. The outer sleeve 5D, fitted over the flexible telescopic sleeve 5C, also prevents wear on the flexible telescopic sleeve 5C.

[0061] Understandably, the connection between the upper end of the protective sleeve 5 and the rod body of the anchor head section 101, and the cooperation between the lower end and the inner section 102 of the hole, can be in various different ways. As long as the protective sleeve 5 can be fixed on the rod body of the anchor head section 101, so that the protective sleeve 5 moves synchronously with the anchor head section 101, and the protective sleeve 5 always surrounds the rod body of the anchor neck section 103 when it moves synchronously with the rod body of the anchor head section 101, while allowing the rod body of the anchor neck section 103 to move freely within the protective sleeve 5, it is within the scope of protection of this invention.

[0062] The specific structure, configuration, and connection with the anchor head section 101 of the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. Example 1:

[0063] See Figures 3A-3BThe anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which is a sleeve 5A. The upper end of the sleeve 5A has a connecting part 51, which is integrally formed with the sleeve 5A and located at the top of the upper end of the sleeve 5A. A threaded hole 511 is provided axially at the center of the connecting part 51. When the anchor rod body 10 is a threaded steel bar, the internal thread of the threaded hole 511 matches the external thread on the anchor rod body 10. During installation, the sleeve 5A is threadedly fitted onto the anchor head section 101, so that the upper end of the sleeve 5A is screwed and fixed onto the anchor head section 101 through the threaded hole 511. The lower end of the sleeve 5A is open and slides onto the inner hole section 102. The fitting length between the sleeve 5A and the inner hole section 102 should be greater than the maximum displacement value of the anchor head section 101 to ensure that the lower end of the sleeve 5A remains on the inner hole section 102 during sliding and does not detach from the inner hole section 102. The upper end of the sleeve 5A is connected and fixed to the rod body of the anchor head section 101 through the connecting part 51. When the upper end of the sleeve 5A (i.e. the protective sleeve 5) moves synchronously with the anchor head section 101, its lower end is always located in the section 102 inside the anchor bolt hole. The rod body of the anchor bolt neck section 103 can move freely inside the sleeve 5A. When the rod body of the anchor bolt neck section 103 extends out of the anchor hole 6, it can directly enter the sleeve 5A for protection. When the rod body of the anchor bolt neck section 103 needs to be retracted, it can be freely retracted into the anchor hole. The sleeve 5A always surrounds the rod body of the anchor bolt neck section 103, thus achieving protection for the area of ​​the anchor bolt neck section 103.

[0064] Since the upper ends of both the anchor head section 101 and the sleeve 5A are to be cast and embedded in the concrete of the external structure 2, the setting of the concrete can further make the connection between the sleeve 5A and the anchor head section 101 more secure.

[0065] To further improve the protective effect, in this embodiment, a sealing ring 52 is provided in the space between the lower inner wall of the sleeve 5A and the anchor rod 1 to seal the gap between the lower inner wall of the sleeve 5A and the anchor rod 1 when the sleeve 5A moves. The sealing ring 52 is made of a flexible waterproof material, such as expanding foam, water-swellable ring, hemp fiber, etc. Figure 3B As shown, after the sleeve 5A moves upward synchronously with the anchor head section 101, the sealing ring 52 moves with the sleeve 5A, always maintaining the sealing state between the sleeve 5A and the rod body of the borehole section 102, completely preventing groundwater from eroding the borehole section 102 after the sleeve 5A moves.

[0066] This embodiment has a simple structure. It only requires screwing the sleeve 5A into the designed position of the anchor head section 101, making on-site installation very convenient. Example 2:

[0067] See Figure 4AThe anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which is a sleeve 5A made of metal material. The upper end of the sleeve 5A is fixed to the anchor head section 101 rod body by welding. Figure 4A As shown, the upper end of the sleeve 5A has a connecting part, including a weld 541 for welding between the upper end of the sleeve 5A and the rod body of the anchor head section 101, and a connecting plate 54 (or a connecting rod). The connecting plate 54 is located at the top of the sleeve 5A and can be integrally formed with the sleeve 5A or embedded in the inner cavity of the top of the sleeve 5A. The connecting plate 54 has a through hole in the central axis, through which the anchor rod body 10 passes, so that the sleeve 5A is fitted onto the anchor rod body 10, with its upper end located at the anchor head section 101. At the connection position between the anchor rod body 10 and the connecting plate 54, a weld 541 is processed. The upper end of the sleeve 5A is welded to the anchor head section 101 through the connecting plate 54, so that the upper end of the sleeve 5A is welded and fixed to the anchor head section 101. The lower end of the sleeve 5A is open and slides on the rod body of the inner hole section 102. Its fitting method and the fitting length between the sleeve 5A and the inner hole section 102 are the same as in Embodiment 1. When the external structure 2 floats upward, it will drive the anchor rod 10 to move together. The upper end of the sleeve 5A moves synchronously under the drive of the anchor head section 101 through the connecting plate 54. Its lower end is always located in the anchor hole section 102. When the anchor neck section 103 repeatedly extends or retracts back and forth at the opening of the anchor hole 6, the anchor neck section 103 moves freely in the sleeve 5A. The sleeve 5A isolates and surrounds the anchor neck section 103, so that the anchor neck section 103 is protected by the sleeve 5A.

[0068] In this embodiment, a sealing ring 52 can also be provided in the space between the lower inner wall of the sleeve 5A and the anchor rod body 10 to seal the gap between the inner wall of the sleeve 5A and the anchor rod body 10.

[0069] See Figure 4B When the anchor rod 1 consists of two or more reinforcing bars, it can be welded to the top of the sleeve 5A via an externally installed connecting rod or connecting plate 54. The lower surface of the connecting rod or connecting plate 54 is welded to the top of the sleeve 5A via a weld 541, and the upper surface of the connecting rod or connecting plate 54 is welded to the anchor head section 101 via a weld 541. That is, the connecting rod or connecting plate 54 is welded to both the sleeve 5A and the anchor head section 101 respectively, thus fixing them together. In addition, the sleeve 5A and the anchor head section 101 are simultaneously embedded in the concrete of the external structure 2. The setting effect of the concrete can further strengthen the connection between the connecting rod or connecting plate 54, the sleeve 5A, and the anchor head section 101.

[0070] The structural design of this embodiment allows for quick on-site construction and secure connections. Example 3:

[0071] See Figure 5The anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which is a sleeve 5A. The upper end of the sleeve 5A has a connecting part, which includes at least one threaded hole provided at the upper end of the sleeve 5A and a set screw 512 screwed into the threaded hole. The threaded hole is radially arranged along the upper side wall of the sleeve 5A, and specifically, 2 to 4 threaded holes can be provided. After the set screw 512 is screwed into the threaded hole, it abuts against the anchor head section 101 rod body radially, so that the upper end of the sleeve 5A is fixedly connected to the anchor head section 101 rod body. The lower end of the sleeve 5A is open and slides on the inner hole section 102 rod body. Its fitting method and the fitting length of the sleeve 5A and the inner hole section 102 are the same as in Embodiment 1. The sleeve 5A is connected and fixed to the rod body of the anchor head section 101 by the set screw 512, so that when the upper end of the sleeve 5A moves synchronously with the anchor head section 101, its lower end is always located in the anchor bolt hole section 102. The rod body of the anchor bolt neck section 103 can move freely within the sleeve 5A. When the rod body of the anchor bolt neck section 103 repeatedly extends or retracts back and forth at the opening of the anchor hole 6, the rod body of the anchor bolt neck section 103 moves freely within the sleeve 5A, and the sleeve 5A always surrounds the rod body of the anchor bolt neck section 103, thus achieving protection for the anchor bolt neck section 103.

[0072] Since the upper ends of the anchor head section 101 and the sleeve 5A are to be cast and embedded in the concrete of the external structure 2, the setting of the concrete can further strengthen the connection between the sleeve 5A, the screw 512 and the anchor head section 101.

[0073] This structure is also very simple, convenient, and quick to install on site, and it is firmly fixed.

[0074] Understandably, in this embodiment, a sealing ring 52 may also be provided in the space between the lower inner wall of the sleeve 5A and the anchor rod body 10 to seal the gap between the lower inner wall of the sleeve 5A and the anchor rod body 10. Example 4:

[0075] See Figure 6The anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which is a sleeve 5A. The upper end of the sleeve 5A has a connecting part, which is a thin plate 56 disposed on the upper end of the sleeve 5A. A weld 561 is processed at the connection between the lower surface of the thin plate 56 and the sleeve 5A, so that the sleeve 5A is welded to the thin plate 56. The thickness of the thin plate 56 is less than the pitch of the external thread of the anchor rod body 10. The center of the thin plate 56 is provided with a through hole 562, the diameter of which is smaller than the outer diameter of the external thread of the anchor rod body 10 but larger than the root diameter of the external thread. The thin plate 56 is clamped in an interference fit at the root of the external thread of the anchor head section 101, so that the upper end of the sleeve 5A is fixed on the anchor head section 101 through the thin plate 56. When the anchor head section 101 moves, it can drive the sleeve 5A to move along with it. The lower end of the sleeve 5A is open and slides onto the rod body of the inner section 102 of the hole. The fitting method and the fitting length between the sleeve 5A and the inner section 102 of the hole are the same as in Embodiment 1. The sleeve 5A is connected and fixed to the rod body of the anchor head section 101 through the thin plate 56, so that when the upper end of the sleeve 5A moves synchronously with the anchor head section 101, its lower end is always located in the inner section 102 of the anchor bolt hole. The rod body of the anchor neck section 103 can move freely within the sleeve 5A. When the rod body of the anchor neck section 103 repeatedly extends or retracts back and forth at the opening of the anchor hole 6, the rod body of the anchor neck section 103 moves freely within the sleeve 5A, and the sleeve 5A always surrounds the rod body of the anchor neck section 103, thus achieving protection for the anchor neck section 103.

[0076] Similarly, sleeve 5A and anchor head section 101 are embedded in the concrete of the outer structure 2. The setting effect of the concrete can also connect the thin plate 56, sleeve 5A and anchor head section 101 into one unit, further making sleeve 5A firmly fixed to the anchor head section 101 of anchor rod 1.

[0077] Understandably, in this embodiment, a sealing ring 52 may also be provided in the space between the lower inner wall of the sleeve 5A and the anchor rod 1 to seal the gap between the inner wall of the sleeve 5A and the anchor rod body 10. Example 5:

[0078] See Figure 7The anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which is a piston-type telescopic sleeve. The piston-type telescopic sleeve includes an upper sleeve 5B and a lower sleeve 7, with the upper sleeve 5B telescopically fitted inside the lower sleeve 7. In this embodiment, the upper end of the upper sleeve 5B has a connecting part 514, which is integrally formed with the upper sleeve 5B and located at the top of the upper end of the upper sleeve 5B. A threaded hole (not shown) is axially provided at the center of the connecting part 514. When the anchor rod body 10 is a threaded steel bar, the internal thread of this threaded hole matches the external thread of the anchor rod body 10. During installation, the upper sleeve 5B is threadedly fitted onto the anchor rod body 10, so that the upper end of the upper sleeve 5B is fixed to the rod body of the anchor head section 101 through the connecting part 514. The lower sleeve 7 is fitted onto the rod body of the hole section 102, located inside the anchor hole 6, and fixed in the cement grout 8 within the anchor hole 6, and will not shift with the displacement of the anchor rod body 10. The lower sleeve 7 has an inner cavity with an opening at the upper end. The diameter of the inner cavity is larger than the outer diameter of the upper sleeve 5B. It is used to accommodate the lower half of the upper sleeve 5B. That is, the upper end of the upper sleeve 5B is connected and fixed to the rod of the anchor head section 101 through the connecting part 514, so that the upper sleeve 5B moves synchronously with the anchor head section 101. The lower half of the upper sleeve 5B is inserted into the inner cavity of the lower sleeve 7, and the inner cavity of the lower sleeve 7 expands and contracts synchronously with the displacement of the anchor head section 101. In this way, when the upper end of the upper sleeve 5B moves with the anchor head section 101, the entire piston-type telescopic sleeve extends or shortens accordingly. The lower sleeve 7 remains fixed in the hole section 102. The anchor neck section 103 can move freely within the upper sleeve 5B and the lower sleeve 7. When the anchor neck section 103 repeatedly extends or retracts back and forth at the opening of the anchor hole 6, the anchor neck section 103 moves freely within the upper sleeve 5B and the lower sleeve 7. The upper sleeve 5B and the lower sleeve 7 always surround the anchor neck section 103, thus achieving protection for the anchor neck section 103.

[0079] At the bottom of the lower sleeve 7, there is also a connecting sealing part, such as... Figure 7 As shown, the connecting sealing part of the lower sleeve 7 is a bottom plate 72 provided at the bottom of the lower sleeve 7. The bottom plate 72 has a central hole that is sealed and connected to the inner section 102. The gap between the bottom plate 72 and the rod body of the inner section 102 is sealed by cement grout 8 or by filling with water-swellable material, rubber ring or foaming agent to prevent the protective material 71 in the lower sleeve 7 from being lost.

[0080] See further Figure 7A stop ring 73 is provided inwardly on the top side wall of the inner cavity of the lower sleeve 7, and an anti-detachment lug 513 extends outwardly on the outer side of the lower end of the upper sleeve 5B. The outer diameter of the anti-detachment lug 513 is smaller than the inner diameter of the inner cavity of the lower sleeve 7, and the inner diameter of the stop ring 73 is smaller than the outer diameter of the anti-detachment lug 513. When the upper sleeve 5B moves upward, the stop ring 73 can ensure that the upper sleeve 5B can move freely up and down and extend and retract synchronously in the inner cavity of the lower sleeve 7, and at the same time prevent the upper sleeve 5B from being pulled upward from the lower sleeve 7.

[0081] In this embodiment, the space between the upper sleeve 5B and the lower sleeve 7 is filled with protective material 71 (such as anti-corrosion grease or semi-solid deformable material such as fluid plastic asphalt). When the lower half of the upper sleeve 5B moves up and down in the inner cavity of the lower sleeve 7, the space between the upper sleeve 5B and the lower sleeve 7 is filled with protective material 71, which can prevent gaps from appearing between the upper sleeve 5B and the cement grout 8 after the upper sleeve 5B moves, thus preventing groundwater from seeping into the borehole section 102. Example 6:

[0082] The anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which is a piston-type telescopic sleeve with the same structure as in embodiment five. The difference is that the connecting sealing part at the bottom of the lower sleeve 7 in this embodiment is different from that in embodiment five.

[0083] like Figures 8A-8B As shown, the lower sleeve 7 has a base plate 72 at its bottom, and the base plate 72 has a central hole. A sealing connecting cylinder 74 extends downward along the central hole. The sealing connecting cylinder 74 is used for a sealing connection with the rod body of the inner section 102. Because the sealing connecting cylinder 74 and the rod body of the inner section 102 have a certain mating length, the sealing effect is better, and it can more effectively prevent the protective material 71 inside the lower sleeve 7 from leaking out of the central hole of the base plate 72. Cement grout or foam 75 is also filled between the sealing connecting cylinder 74 and the rod body of the inner section 102 to seal and stop water, further ensuring a complete seal between the lower sleeve 7 and the rod body of the inner section 102, and preventing groundwater and soil from seeping into and eroding the rod body of the inner section 102 from the gap between the bottom of the lower sleeve 7 and the rod body of the inner section 102.

[0084] Understandably, the sealing between the lower sleeve 7 and the inner section 102 rod can also take many other forms, such as fixing a cloth sleeve on the lower part of the lower sleeve 7, which is then wrapped around the inner section 102 rod and tightened to achieve the same sealing effect. Example 7:

[0085] See Figure 9The anchor neck protection assembly provided in this embodiment includes a protective sleeve 5, which comprises a flexible telescopic sleeve 5C. The upper end of the flexible telescopic sleeve 5C is fixed to the anchor head section 101 rod body by an upper fixing member 515, and the lower end is fixed to the bore section 102 rod body by a lower fixing member 516, so that the flexible telescopic sleeve 5C completely covers the anchor neck section 103 rod body. In this embodiment, the flexible telescopic sleeve 5C is a telescopic corrugated tube. The upper fixing member 515 and the lower fixing member 516 adopt buckles or hose clamps, so that both ends of the flexible telescopic sleeve 5C are fixed at the designed positions on the anchor head section 101 and the bore section 102 rod body, respectively, thus providing protection for the anchor neck section 103. When the anchor bolt load is large during the high-water season, the external structure 2 and the anchor head section 101 move upwards, and the upper end of the flexible expansion sleeve 5C is fixed to the anchor head section 101 rod body by the upper fixing member 515. It will move synchronously with the anchor head section 101, and the flexible expansion sleeve 5C will extend. During the low-water season, the load decreases, the external structure 2 moves downwards, and the upper end of the flexible expansion sleeve 5C moves downwards with the anchor head section 101, and the flexible expansion sleeve 5C shortens synchronously. Since the lower end of the flexible expansion sleeve 5C is fixed on the rod body of the hole section 102, the connection between the upper end of the flexible expansion sleeve 5C and the anchor head section 101, and the connection between the bottom of the flexible expansion sleeve 5C and the hole section 102, is always in a sealed state. When the rod body of the anchor bolt neck section 103 repeatedly extends or retracts back and forth at the opening of the anchor hole 6, the flexible expansion sleeve 5C surrounds the rod body of the anchor bolt neck section 103, effectively preventing the erosion of the anchor bolt neck section 103 by groundwater and soil. Example 8:

[0086] See Figures 10A-10B The anchor neck protection assembly provided in this embodiment includes a protective sleeve 5. The protective sleeve 5 includes a flexible telescopic sleeve 5C and an outer sleeve 5D. The outer sleeve 5D is disposed outside the flexible telescopic sleeve 5C. The upper end of the flexible telescopic sleeve 5C is fixed to the anchor head section 101 rod body by an upper fixing member 515, and the lower end is fixed to the hole section 102 rod body by a lower fixing member 516. The structure of the outer sleeve 5D and the connection and fixing method with the anchor head section 101 rod body are the same as in Embodiment 1. The outer sleeve 5D is disposed outside the flexible telescopic sleeve 5C. The upper end of the outer sleeve 5D is provided with a connecting part for fixing the upper end of the outer sleeve 5D to the anchor head section 101 rod body. The flexible telescopic sleeve 5C is disposed in the inner cavity of the outer sleeve 5D. The lower end of the outer sleeve 5D is slidably disposed on the rod body of the hole section 102 and located below the bottom of the flexible telescopic sleeve 5C. The outer sleeve 5D covers the flexible expansion sleeve 5C to prevent the flexible expansion sleeve 5C from being damaged by excessive friction with the surrounding soil or cement grout 8 when the anchor head section 101 is displaced. This is especially beneficial when the anchor head section 101 is repeatedly displaced up and down, thus improving the reliability of the protective sleeve 5. At the same time, the flexible expansion sleeve 5C and the outer sleeve 5D can also form a double seal for the anchor neck section 103, completely preventing groundwater and soil from eroding the anchor rod body 10.

[0087] The present invention also provides an anchor bolt having the above-described protective component structures.

[0088] See Figures 3A-10B In the above embodiments, a fluid or plastic protective material 53 is filled between the protective sleeve 5 and the anchor rod 10, so that the anchor rod 10 inside the protective sleeve 5 is completely protected by the protective material 53, preventing groundwater from seeping in through the gap between the protective sleeve 5 and the anchor rod 10. The protective material 53 can be a semi-solid deformable material (fluid or plastic protective material), such as asphalt or grease, which has a certain degree of viscosity and plastic deformation properties. When the protective sleeve 5 moves with the anchor head section 101, the protective material 53 inside the protective sleeve 5 will deform to a certain extent due to its adhesiveness. The protective material 53 at the bottom of the protective sleeve 5 will still adhere to the cement grout 8, preventing gaps from appearing between the protective sleeve 5 and the cement grout 8 after the protective sleeve 5 moves. This not only protects the anchor neck section 103, but also effectively protects the rod body of the borehole section 102 at the bottom of the protective sleeve 5. It can prevent gaps from appearing between the protective sleeve 5 and the cement grout 8, which would cause groundwater to seep into the borehole section 102 rod body in the moving area.

[0089] To improve the overall protective performance of the anchor bolt 1, the present invention can also coat the rod body of the inner bore section 102 with anti-corrosion material and then cover it with an isolation tube 9 (such as heat shrink tubing). When the protective sleeve 5 is a sleeve structure, the lower end of the sleeve is slidably fitted onto the isolation tube 9 of the inner bore section 102 rod body and moves synchronously with the anchor head section 101 on the isolation tube 9 of the inner bore section 102 rod body; when the protective sleeve 5 is a telescopic sleeve, the lower end of the telescopic sleeve is fitted onto the isolation tube 9 of the inner bore section 102 rod body and fixed thereon.

[0090] The anchor bolt of the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. Example 9:

[0091] See Figures 3A-3BIn this embodiment, the anchor rod 1 has a bearing body 104 at the lower end of the borehole section 102 of the anchor rod body 10. An isolation tube 9 is fitted onto the borehole section 102, which isolates groundwater and soil, preventing erosion of the anchor rod body 10. The isolation tube 9 is fitted onto the anchor rod body 10 in the borehole section 102, allowing the anchor rod body 10 to move freely within it. Anti-corrosion lubricating grease can be filled between the isolation tube 9 and the borehole section 102, preventing the isolation tube 9 from shifting with the anchor rod body 10. A protective component is provided at the anchor rod neck section 103. In this embodiment of the anchor neck protection assembly, the protective sleeve 5 has the same structure as in Embodiment 1. The protective sleeve 5 is a sleeve 5A, which is fixed to the rod body of the anchor head section 101 by a threaded connection through a connecting part 51 and a threaded hole 511 at its upper end. The lower end of the sleeve 5A is open and slides on the isolation tube 9 of the inner section 102 of the hole, and can move synchronously with the anchor head section 101. A sealing ring 52 is also provided in the space between the lower end of the sleeve 5A and the isolation tube 9 to seal the gap between the inner wall of the lower end of the sleeve 5A and the isolation tube 9, so as to prevent groundwater from corroding the rod body of the inner section 102 of the hole when the isolation tube 9 loses its function after the sleeve 5A moves upward with the anchor head section 101.

[0092] To further enhance the protective effect, this embodiment fills the entire gap space between the sleeve 5A and the anchor rod body 10 and the isolation pipe 9 with protective material 53, so that the entire neck section 103 of the anchor rod is protected by the protective material 53, further preventing groundwater and soil from entering the sleeve 5A and eroding the neck section 103 of the anchor rod. The protective material 53 can be a fluid (semi-solid) or plastic deformable material, such as asphalt or grease, with certain viscosity and plastic deformation properties. When the sleeve 5A moves with the anchor head section 101, the protective material 53 inside the sleeve 5A will deform to a certain extent due to its viscosity. The protective material 53 at the bottom of the sleeve 5A will adhere to the sealing ring 52, preventing gaps from appearing between the sleeve 5A and the cement grout 8 after displacement, preventing groundwater and soil from seeping in, and further ensuring the corrosion resistance of the anchor rod 1.

[0093] In this embodiment, a water-stop ring 57 is also provided on the outer periphery of the upper end of the protective sleeve 5 to prevent water from seeping into the outer structure 2 from the outside of the protective sleeve 5. Example 10:

[0094] See Figure 7In this embodiment, the lower end of the anchor rod 10's bore section 102 is provided with a bearing body 104, and an isolation tube 9 is sleeved on the bore section 102 to isolate groundwater and prevent groundwater and soil from eroding the anchor rod 10. Anti-corrosion lubricating grease can be filled between the isolation tube 9 and the bore section 102, and the isolation tube 9 will not move with the anchor rod 10. A protective sleeve 5 is provided at the anchor rod neck section 103. The structure of the anchor neck protective sleeve 5 in this embodiment is the same as that in Embodiment 5. This protective sleeve 5 is a piston-type telescopic sleeve, comprising an upper sleeve 5B and a lower sleeve 7. The upper sleeve 5B is fitted inside the lower sleeve 7, and the lower sleeve 7 is fitted onto the isolation tube 9 of the borehole section 102 and fixed in the cement grout 8 within the anchor hole 6. The upper end of the upper sleeve 5B is fixed to the anchor head section 101 via a connecting part 514. The upper sleeve 5B moves synchronously with the anchor head section 101, and the lower half of the upper sleeve 5B is inserted into the inner cavity of the lower sleeve 7 and can extend and retract synchronously with the anchor head section 101. The gap between the bottom plate 72 at the bottom of the lower sleeve 7 and the isolation tube 9 is sealed by the cement grout 8, or separately filled with water-swellable material, rubber rings, or foaming agents to seal the gap, ensuring a sealed connection between the bottom of the lower sleeve 7 and the isolation tube 9.

[0095] Between the upper sleeve 5B and the lower sleeve 7, a protective material 71 (such as anti-corrosion grease or semi-solid deformable material such as fluid asphalt) is filled. When the lower half of the upper sleeve 5B moves up and down in the inner cavity of the lower sleeve 7, the protective material 71 between the upper sleeve 5B and the lower sleeve 7 further prevents the possible gaps between the upper sleeve 5B and the cement grout 8 after the upper sleeve 5B moves, which could cause groundwater to seep into the section 102 rod body in the erosion hole.

[0096] In this embodiment, protective material 53 is filled into all the gaps between the upper sleeve 5B and the lower sleeve 7 and the anchor rod body 10 and the isolation pipe 9, so that the entire anchor neck section 103 is protected by the protective material 53, further preventing groundwater from eroding the anchor neck section 103.

[0097] In this embodiment, the protective material 53 can be integrated with the protective material 71 inside the lower sleeve 7. The gap between the inner wall of the lower end of the upper sleeve 5B and the rod body of the hole section 102 can be sealed by cement grout 8 or by filling with water-swellable material, rubber rings, or foaming agents to prevent the protective material 71 inside the lower sleeve 7 from being lost. When the buoyancy of the external structure 2 increases and it moves upward, the upper sleeve 5B moves upward synchronously with the anchor head section 101. At this time, the protective material 53 inside the upper sleeve 5B can fall into the lower sleeve 7. Since the inner cavity of the lower sleeve 7 is also filled with protective material 71, when the lower half of the upper sleeve 5B moves up and down in the inner cavity of the lower sleeve 7, the space between the upper sleeve 5B and the lower sleeve 7 is always filled with protective material 71, completely preventing groundwater and soil from eroding the anchor neck section 103.

[0098] Similar to Embodiment Nine, this embodiment also provides a water-stop ring 57 on the outer periphery of the upper end of the upper sleeve 5B, which will not be described in detail here. Example 11:

[0099] See Figure 9 In this embodiment of the anchor rod 1, the lower end of the rod body 102 in the hole section 102 of the anchor rod body 10 is provided with a bearing body 104, and an isolation tube 9 is sleeved on the rod body in the hole section 102. A protective sleeve 5 is sleeved on the neck section 103 of the anchor rod. The structure of the protective sleeve 5 of the anchor rod neck in this embodiment is the same as that in embodiment seven. The protective sleeve 5 includes a flexible telescopic sleeve 5C. The upper end of the flexible telescopic sleeve 5C is fixed to the rod body of the anchor head section 101 by an upper fixing member 515, and the lower end crosses the gap 4 and enters the anchor hole 6 and is fixed to the isolation tube 9 of the rod body in the hole section 102 by a lower fixing member 516. During protection, the upper end of the flexible telescopic sleeve 5C expands and contracts with the vertical displacement of the anchor head section 101, and the lower end is sealed and overlapped with the isolation tube 9 by the lower fixing member 516, so that no gaps or voids are formed between the lower end of the flexible telescopic sleeve 5C and the isolation tube 9, thus preventing groundwater and soil from eroding the neck section 103 of the anchor rod.

[0100] Similarly, the gap between the flexible expansion tube 5C, the anchor rod body 10 and the isolation tube 9 is filled with a fluid or plastic protective material 53, such as anti-corrosion grease and asphalt, so that the entire anchor neck section 103 is protected by the protective material 53, further preventing the possible gaps between the flexible expansion tube 5C and the cement grout 8 from causing groundwater to seep into the erosion hole section 102 of the rod body. Example 12:

[0101] See Figures 10A-10B In this embodiment of anchor rod 1, a bearing body 104 is provided at the lower end of the inner section 102 of the anchor rod body 10, and an isolation tube 9 is sleeved on the inner section 102 of the rod body. A protective sleeve 5 is provided at the neck section 103 of the anchor rod. The structure of the anchor neck protective sleeve 5 in this embodiment of anchor rod is the same as that in embodiment eight, including a flexible telescopic sleeve 5C and an outer sleeve 5D. The upper end of the flexible telescopic sleeve 5C is fixed to the anchor head section 101 of the rod body by an upper fixing member 515, and the lower end is fixed to the isolation tube 9 of the inner section 102 of the rod body by a lower fixing member 516. The outer sleeve 5D is located outside the flexible expansion sleeve 5C. The upper end of the outer sleeve 5D is fixed to the anchor head section 101 rod body through the connecting part, and the lower end is slidably located on the isolation tube 9 of the hole section 102 and located below the bottom of the flexible expansion sleeve 5C. This can provide double protection for the anchor neck section 103 and prevent the flexible expansion sleeve 5C from being damaged by excessive friction with the surrounding soil or cement grout 8 when the anchor head section 101 is displaced.

[0102] Similarly, the gap between the flexible expansion tube 5C, the anchor rod 10 and the isolation tube 9 is filled with a fluid or plastic protective material 53 to further prevent groundwater from seeping into the erosion hole section 102 rod body due to gaps that may appear between the flexible expansion tube 5C and the cement grout 8 after the flexible expansion tube 5C moves.

[0103] The present invention also provides a method for constructing an anchor bolt with an anchor bolt neck protection component, comprising the following steps:

[0104] S1. The protective sleeve 5 in the protective assembly is fitted onto the anchor rod body 10, and the upper end of the protective sleeve 5 is connected and fixed to the rod body of the anchor head section 101.

[0105] In this step, when the protective sleeve 5 is sleeve 5A:

[0106] (1) If the sleeve 5A is threadedly connected to the anchor section 101 rod body, it can be done as follows: Figures 3A-3B As shown, sleeve 5A is fitted onto the neck section 103 of the anchor rod, and the upper end of sleeve 5A is screwed onto the rod body of the anchor head section 101 through the threaded hole 511 axially provided on the connecting part 51 of sleeve 5A.

[0107] (2) If the protective sleeve 5 is fixed by welding to the anchor head section 101, it can be as follows: Figure 4A As shown, sleeve 5A is fitted onto the neck section 103 of the anchor bolt, with the center of the top connecting plate 54 of sleeve 5A positioned on the bolt body of the anchor head section 101. Then, a weld 541 is machined at the connection point between the bolt body of the anchor head section 101 and the connecting plate 54, so that the upper end of sleeve 5A is welded and fixed to the bolt body of the anchor head section 101 via the connecting plate 54. When the anchor bolt body 10 consists of two or more reinforcing bars, the fixing method is the same as described above.

[0108] (3) If the protective sleeve 5 is connected to the anchor head section 101 rod body via a connector, it can be as follows: Figure 5 , Figure 6 As shown, sleeve 5A is fitted onto anchor neck section 103, and the upper end of sleeve 5A is connected to the rod body of anchor head section 101 using a connector (set screw 512 or thin plate 56).

[0109] After the sleeve 5A is connected and fixed to the anchor head section 101, protective material 53 is filled between the sleeve 5A and the anchor rod 10. A sealing ring 52 can be installed in the space between the lower end of the sleeve 5A and the rod body of the inner hole section 102 to seal the bottom of the sleeve 5A. The sealing ring can slide on the inner hole section 102 together with the lower end of the sleeve 5A.

[0110] When the protective sleeve 5 is a piston-type telescopic sleeve:

[0111] like Figure 7 , Figures 8A-8BAs shown, the upper sleeve 5B is fitted onto the anchor rod body 10, so that the upper sleeve 5B is connected and fixed to the rod body of the anchor head section 101. Then, protective material 53 is filled between the upper sleeve 5B and the anchor rod body 10. Then, the lower sleeve 7 is placed in the anchor hole 6, and protective material 71 is injected into the inner cavity of the lower sleeve 7. Then, the anchor rod 1 with the upper sleeve 5B is inserted into the lower sleeve 7, so that the lower half of the upper sleeve 5B is placed in the inner cavity of the lower sleeve 7.

[0112] When the protective sleeve 5 is a flexible telescopic sleeve 5C:

[0113] like Figure 9 As shown, the flexible expansion sleeve 5B is fitted onto the anchor neck section 103. First, the lower end of the flexible expansion sleeve 5C is connected and fixed to the rod body of the hole section 102 using the lower fixing member 516. Then, protective material 53 is injected between the flexible expansion sleeve 5C and the rod body of the hole section 102. Finally, the upper end of the flexible expansion sleeve 5C is fixed to the rod body of the anchor head section 101 using the upper fixing member 515.

[0114] After the protective sleeve 5 is fixed, a water-stop ring 57 can be installed on the upper end of the protective sleeve 5.

[0115] S2 connects the lower end of the protective sleeve 5 to the rod body of the inner section 102, and installs the bearing body 104 at the lower end of the rod body of the inner section 102.

[0116] S3 places the rod with the protective sleeve 5 and the bearing body 104 installed in the designed position in the anchor hole 6, and then injects the cement grout 8 into the anchor hole 6. After the cement grout 8 solidifies, the anchor head section 101 rod and the upper end of the protective sleeve 5 are fixed to the external structure 2 by pouring cement grout.

[0117] When the inner section 102 of the anchor bolt body 10 is fitted with an isolation tube 9, the present invention also provides another construction method for an anchor bolt with an anchor bolt neck protection assembly, comprising the following steps:

[0118] S1. The isolation pipe 9 is fitted onto the rod body of the inner section 102 of the anchor bolt.

[0119] S2 places the protective sleeve 5 from the protective assembly onto the anchor rod body 10, and connects and fixes the upper end of the protective sleeve 5 to the rod body of the anchor head section 101;

[0120] S3 will connect the lower end of the protective sleeve 5 to the isolation tube 9 of the inner section 102 of the connection hole;

[0121] The specific construction method for each protective sleeve 5 in this step can be found in the previous construction method. The difference is that in the specific protective sleeve 5, the lower end of the sleeve 5A slides on the isolation tube 9 of the inner section 102, and the lower sleeve 7 and the flexible telescopic sleeve 5C are fixed on the isolation tube of the inner section 102.

[0122] S4 places the rod with the protective sleeve 5 and the bearing body 104 installed in the designed position in the anchor hole 6, and then injects the cement grout 8 into the anchor hole 6. After the cement grout 8 solidifies, the anchor head section 101 rod and the upper end of the protective sleeve 5 are fixed to the external structure 2 by pouring cement grout.

[0123] The above-mentioned anchor bolt construction method allows the anchor bolt neck protective sleeve 5 to be installed directly on-site. The operation process is simple, easy, convenient, and reliable.

[0124] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An anchor bolt neck protection assembly, characterized in that, The device includes a protective sleeve, which is used to cover and surround the neck section of the anchor bolt, allowing the bolt body of the neck section to move freely within the protective sleeve. The upper end of the protective sleeve is fixedly connected to the anchor head section of the anchor bolt, so that the protective sleeve moves synchronously with the anchor head section. The lower end of the protective sleeve is connected to the inner section of the anchor bolt hole, so that the protective sleeve always surrounds the bolt body of the neck section when its upper end moves synchronously with the anchor head section. The protective sleeve is a telescopic sleeve. The upper end of the telescopic sleeve has a connecting part for connecting with the anchor head section rod body, so that the upper end of the protective sleeve moves synchronously with the anchor head section rod body; the lower end of the telescopic sleeve is open for fitting into the hole section and fixing it. The telescopic sleeve is a piston-type telescopic sleeve, which includes an upper sleeve and a lower sleeve. The upper sleeve is telescopically fitted inside the lower sleeve. The connecting part is provided at the upper end of the upper sleeve, so that the upper sleeve is fixedly connected to the anchor head section rod body through the connecting part, and the upper sleeve moves synchronously with the anchor head section rod body. The lower end of the lower sleeve is fitted inside the hole section and fixed.

2. The anchor neck protection assembly according to claim 1, characterized in that, The lower end of the lower sleeve has a connecting sealing part, which connects and seals the inner wall of the lower end of the lower sleeve with the inner section of the hole.

3. The anchor neck protection assembly according to claim 1, characterized in that, The upper sleeve is also provided with an anti-detachment lug on the outer side of its lower end, and the lower sleeve is also provided with a stop ring on its upper end. The inner diameter of the stop ring is smaller than the outer diameter of the anti-detachment lug. When the upper sleeve moves upward with the anchor head section rod, the stop ring is used to restrict the upper sleeve from being pulled out of the lower sleeve.

4. An anchor bolt, characterized in that, The anchor neck is fitted with an anchor neck protection assembly as described in any one of claims 1-3.

5. The anchor bolt according to claim 4, characterized in that, The space between the protective sleeve and the anchor rod in the protective assembly is filled with a fluid or plastic protective material.

6. The anchor bolt according to claim 4 or 5, characterized in that, An isolation tube is fitted onto the inner section of the anchor rod, and the lower end of the telescopic sleeve is fitted onto and fixed onto the isolation tube in the inner section of the anchor rod.

7. A method for constructing an anchor bolt, characterized in that... Includes the following steps: The protective sleeve of the protective assembly according to any one of claims 1-3 is fitted onto the anchor neck, so that the upper end of the protective sleeve is fixedly connected to the rod body of the anchor head section; The lower end of the protective sleeve is fitted and connected to the inner section of the hole; Place the anchor rod in the designed position inside the anchor hole.

8. A method for constructing an anchor bolt, characterized in that... Includes the following steps: The isolation tube is fitted onto the section of the anchor rod inside the hole; The protective sleeve of the protective assembly according to any one of claims 1-3 is fitted onto the anchor neck, so that the upper end of the protective sleeve is fixedly connected to the rod body of the anchor head section; The lower end of the protective sleeve is fitted and connected to the isolation tube in the inner section of the hole; Place the anchor rod in the designed position inside the anchor hole.

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