Slope protection anchor rod for bridge and tunnel engineering
By using mechanical expansion anchoring with threaded rods and sliding sleeve structures, along with internal and external grouting design, the problem of anchoring failure in loose, soft, and water-rich strata was solved, improving the safety of slope protection and the grout filling effect in bridge and tunnel engineering.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-10
AI Technical Summary
Existing methods of full-length bonded anchor bolts and mechanical anchoring at the ends are prone to anchoring failure in loose, soft rock, and water-rich strata, reducing the safety of slope protection in bridge and tunnel engineering.
The structure employs a threaded rod and a sliding sleeve, with the sliding sleeve being raised and lowered through the threaded engagement. Combined with the mechanical expansion and anchoring of the fastening plate, pressure grouting from the inside out is achieved through the grouting groove and grouting hole, ensuring that the grout fully fills the cavity formed by the expansion of the fastening plate and forms a uniform coating layer.
It improves the overall tightness of the anchorage, enhances the safety of slope protection in bridge and tunnel engineering, and provides initial anchoring force, especially in soft strata prone to collapse, thus avoiding the problem of grout loss.
Smart Images
Figure CN224106403U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of slope protection anchor rod, specifically relates to a slope protection anchor rod for bridge and tunnel engineering. BACKGROUND
[0002] In the field of slope reinforcement of bridge and tunnel engineering, the slope protection anchor rod is the key structure to ensure the stability of rock-soil body. The traditional slope protection anchor rod adopts single grouting bonding or end mechanical anchoring mode, such as full-length bonding anchor rod or end expansion bolt anchor rod.
[0003] The existing full-length bonding anchor rod only relies on the bonding force of grout and hole wall, and the end mechanical anchoring relies on local extrusion friction force. If grouting or grouting is not dense in loose rock-soil body, soft rock and water-rich stratum, it is easy to cause anchoring failure, thereby reducing the overall safety. SUMMARY
[0004] The utility model provides a slope protection anchor rod for bridge and tunnel engineering, and aims to solve the problem that the existing full-length bonding anchor rod only relies on the bonding force of grout and hole wall, and the end mechanical anchoring relies on local extrusion friction force. If grouting or grouting is not dense in loose rock-soil body, soft rock and water-rich stratum, it is easy to cause anchoring failure, thereby reducing the overall safety.
[0005] The utility model embodiment provides a slope protection anchor rod for bridge and tunnel engineering, including main part, the bottom of main part is fixed with the conical head, the outer wall surface of main part is screw thread, the main part is connected with the grout resistance plug on the screw thread, the top of main part is fixed with the rod head, the inside of main part is hollow, the inside of main part is equipped with the drive part, the outer wall surface of main part is equipped with the fastening part.
[0006] Further, the drive part includes a threaded rod located inside the main body, the bottom of the threaded rod is rotatably connected to the inner wall surface of the main body, the top of the threaded rod extends to the outside through the rod head, and a sliding sleeve is threadedly connected to the rod body of the threaded rod.
[0007] By adopting the above technical scheme, the threaded rod is rotatably connected to the inner wall bottom of the main body, and then the sliding sleeve can be lifted along the threaded rod through threaded cooperation. The top of the threaded rod extends to the outside of the rod head, which can be rotated by using a wrench or an electric tool, thereby achieving convenient construction.
[0008] Further, the fastening part includes an opening symmetrically provided on the main body, a fastening plate is rotatably connected to the bottom of the opening, a fixing rod is rotatably connected to one side of the fastening plate facing the threaded rod, and the other end of the fixing rod is rotatably connected to the sliding sleeve.
[0009] The symmetrically arranged openings allow the fastening plate to expand outward, and the bottom of the fastening plate is hinged to the main body, so that the fastening plate will not be separated from the main body during expansion; when the sliding sleeve is driven to move downward by the threaded rod, the fixed rod pushes the fastening plate to expand outward around the hinge point, directly extruding the rock-soil body of the hole wall, forming a mechanical expansion anchoring, and the structure establishes preliminary anchoring force before grouting, and is especially suitable for soft strata prone to hole collapse.
[0010] Further, the inside of the threaded rod is provided with a grouting groove at the upper side of the sliding sleeve, and the surface of the threaded rod is provided with a grouting hole, and the grouting groove is in communication with the internal cavity of the main body through the grouting hole.
[0011] By adopting the above technical scheme, the grouting groove extends axially along the inside of the threaded rod, and the grouting holes are radially distributed, the slurry is injected into the internal cavity of the main body through the grouting groove and the grouting hole, and then diffuses outward through the openings, which realizes internal pressure grouting, ensures that the slurry fully fills the cavity formed by the expansion of the fastening plate, forms a uniform wrapping layer, and avoids the slurry loss problem of the traditional grouting process.
[0012] Further, the top of the inner wall surface of the grouting groove is hexagonal.
[0013] By adopting the above technical scheme, the hexagonal interface provides torque transmission function, facilitating rotation of the threaded rod through the hexagonal.
[0014] The beneficial effects of the utility model are:
[0015] 1. The utility model discloses a driving part and fastening part are arranged, the threaded rod rotates, can drive the sliding sleeve to displace up and down, and then the fixed rod is expanded outward to the fastening plate, and then extrudes the rock-soil, forms mechanical expansion anchoring.
[0016] 2. The utility model discloses a grouting groove and grouting hole are arranged, the grouting groove extends axially along the inside of the threaded rod, and the grouting holes are radially distributed, the slurry is injected into the internal cavity of the main body through the grouting groove and the grouting hole, and then diffuses outward through the openings, which realizes internal pressure grouting, ensures that the slurry fully fills the cavity formed by the expansion of the fastening plate, forms a uniform wrapping layer, avoids the slurry loss problem of the traditional grouting process, improves the overall grouting fastening degree, and improves safety.
[0017] Other features and advantages of the utility model will be set forth in the subsequent description, and, partially, become apparent from the description, or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structure specially pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0018] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:
[0019] Figure 1 It is a front view structural schematic diagram of the main body of the embodiment of the present application;
[0020] Figure 2 It is a front view structural schematic diagram of the threaded rod of the embodiment of the present application;
[0021] Figure 3 It is a schematic diagram of the internal structure of the main body when the fastening plate is not opened of the embodiment of the present application;
[0022] Figure 4 It is a schematic diagram of the internal structure of the main body when the fastening plate is opened of the embodiment of the present application;
[0023] Figure 5 It is a schematic diagram of the enlarged structure at a of the embodiment of the present application;
[0024] Figure 6 It is a schematic diagram of the enlarged structure at b of the embodiment of the present application;
[0025] Figure 7 It is a top view structural schematic diagram of the threaded rod of the embodiment of the present application;
[0026] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings: DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the technical scheme of the present application more clear, the technical scheme of the embodiment of the present application will be described clearly and completely in the following with reference to the drawings of the embodiment of the present application. The same reference signs in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0028] REFERENCE Figures 1-7The utility model discloses a kind of slope protection anchor rods for bridge and tunnel engineering, including main body 1, the bottom of main body 1 is fixed with conical head 2, the outer wall surface of main body 1 is screw thread, main body 1 is threadedly connected with grout blocking plug 3, the top of main body 1 is fixed with stem head 4, the inside of main body 1 is hollow, the inside of main body 1 is equipped with driving part 5, driving part 5 includes the screw rod 51 in the inside of main body 1, the bottom of screw rod 51 is rotatably connected with the bottom of the inner wall surface of main body 1, the top of screw rod 51 extends to outside through stem head 4, screw rod 51 is threadedly connected with sliding sleeve 52 on the stem body, screw rod 51 is rotatably connected with the inner wall bottom of main body 1, and then sliding sleeve 52 can be lifted along screw rod 51 by screw thread cooperation, screw rod 51 top extends to stem head 4 outside, can be rotated by spanner or electric tool, realize construction convenience.
[0029] Refer to Figures 1-7 The outer wall surface of main body 1 is equipped with fastening part 6, fastening part 6 includes the opening 61 symmetrically equipped on main body 1, the bottom of opening 61 is rotatably connected with fastening plate 62, one side of fastening plate 62 rotatably connected with fixed rod 63 towards screw rod 51, the other end of fixed rod 63 is rotatably connected with sliding sleeve 52, and the opening 61 symmetrically arranged allows fastening plate 62 to spread outwards, and its bottom is hinged with main body 1, to ensure that it does not separate from main body 1 when spreading out, because the periphery of sliding sleeve 52 is connected with fixed rod 63 between fastening plate 62, and at the same time, fixed rod 63 can only rotate longitudinally with the rotation point of fastening plate 62, cannot shift horizontally, and then fixed rod 63 can limit sliding sleeve 52, and then when screw rod 51 rotates, sliding sleeve 52 can only slide up and down along screw rod 51, and at the same time, the number of rotation of screw rod 51 is fixed when fastening plate 62 is never opened to open state, and then after main body 1 is inserted into slope protection, the fixed number of rotation of screw rod 51 can be opened to maximum state by rotating, avoid that fastening plate 62 is retracted or even because the length of fixed rod 63 appears interference due to excessive rotation of screw rod 51;When sliding sleeve 52 is driven to move down by screw rod 51, fixed rod 63 pushes fastening plate 62 to spread outwards around hinged point, directly extruding hole wall rock-soil body, forming mechanical expansion anchoring, the structure establishes preliminary anchoring force before grouting, especially applicable to soft stratum of easy hole collapse.
[0030] Refer to Figures 1-7The inner part of the threaded rod 51 is provided with a grouting groove 511 at the upper side of the sliding sleeve 52, the top of the inner wall surface of the grouting groove 511 is hexagonal, the hexagonal interface provides torque transmission function, facilitating the rotation of the threaded rod 51 through the hexagonal, the surface of the threaded rod 51 is provided with a grouting hole 512, the grouting groove 511 and the internal cavity of the main body 1 are communicated through the grouting hole 512, the grouting groove 511 extends along the inner part of the threaded rod 51 in the axial direction, the grouting hole 512 is distributed in the radial direction, the slurry is injected into the internal cavity of the main body 1 through the grouting hole 512 via the grouting groove 511, and then diffuses outwardly through the opening 61, so that the internal pressure grouting is realized, the slurry is ensured to be fully filled in the cavity formed by the expansion of the fastening plate 62, a uniform wrapping layer is formed, and the slurry loss problem in the traditional grouting process is avoided.
[0031] The implementation is specific: when in use, the main body 1 is drilled into the slope protection, after the main body 1 enters the slope protection, the threaded rod 51 is rotated through the grouting groove 511 of the hexagonal, and then the sliding sleeve 52 slides downward along the threaded rod 51, after a certain number of rotations are fixed, the fastening plate 62 is expanded to the maximum state under the action of the fixed rod 63, and then the effect of the anchor rod expansion is realized, at this time, the slurry is injected into the grouting groove 511, the slurry can fill the interlayer between the main body 1 and the threaded rod 51 through the grouting hole 512, and then flows to the outside through the opening 61, so that uniform grouting is realized from the inside to the outside.
[0032] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A slope protection anchor for bridge tunnel engineering, comprising a main body (1), characterized in that, The bottom of the main body (1) is fixed with a tapered head (2), the outer wall surface of the main body (1) is thread-shaped, the main body (1) is threadedly connected with a grout blocking plug (3), the top of the main body (1) is fixed with a rod head (4), the inside of the main body (1) is hollow, the inside of the main body (1) is provided with a driving part (5), and the outer wall surface of the main body (1) is provided with a fastening part (6).
2. The slope protection anchor rod for bridge tunnel engineering according to claim 1, characterized in that: The driving part (5) comprises a threaded rod (51) located in the inside of the main body (1), the bottom of the threaded rod (51) is rotationally connected with the bottom of the inner wall surface of the main body (1), the top of the threaded rod (51) extends to the outside through the rod head (4), and the rod body of the threaded rod (51) is threadedly connected with a sliding sleeve (52).
3. The slope protection anchor rod for bridge tunnel engineering according to claim 2, characterized in that: The fastening part (6) comprises openings (61) symmetrically arranged on the main body (1), the bottom of the opening (61) is rotationally connected with a fastening plate (62), one side of the fastening plate (62) rotationally connected with a fixing rod (63) towards the threaded rod (51), and the other end of the fixing rod (63) is rotationally connected with the sliding sleeve (52).
4. The slope protection anchor rod for bridge tunnel engineering according to claim 2, characterized in that: The inside of the threaded rod (51) is provided with a grouting groove (511) at the upper side of the sliding sleeve (52), the surface of the threaded rod (51) is provided with a grouting hole (512), and the grouting groove (511) is in communication with the internal cavity of the main body (1) through the grouting hole (512).
5. The slope protection anchor rod for bridge tunnel engineering according to claim 4, characterized in that: The top of the inner wall surface of the grouting groove (511) is hexagonal.