Expanding body anchor rod with slope sliding function

Abstract

The utility model provides an expansion body anchor rod with a slope sliding function, which comprises an anchor rod body, a blocking head is arranged at the first end of the anchor rod body, an expansion body mechanism is arranged at the second end of the anchor rod body, and the expansion body mechanism can move along the axial direction of the anchor rod body; the anchor rod body is movably sleeved with the at least two casing pipe sections, the at least two casing pipe sections are limited between the blocking head and the expansion body mechanism, the adjacent faces of the adjacent casing pipe sections are inclined faces matched with each other, and the adjacent casing pipe sections can slide along the inclined faces under pushing of the expansion body mechanism so as to generate dislocation. According to the utility model, the periphery of the anchor rod body is sleeved with the at least two sleeve sections, the sleeve sections are limited between the blocking head and the expansion body mechanism, then the adjacent surfaces between the adjacent sleeve sections are matched inclined surfaces, and the sleeve sections are fixed by pushing the expansion body mechanism. The adjacent sleeve sections slide along the inclined planes under the action of extrusion force to generate dislocation, so that body expansion is realized, the axial frictional resistance of the expanded anchor rod can be greatly increased, and the tensile property of the anchor rod is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anchoring construction, in particular to an expanding bolt with inclined plane sliding. Background Art

[0002] Anchoring technology has been widely applied in many fields such as high-rise buildings, rail transit, bridge and tunnel engineering, etc.; the engineering community is facing a large number of geotechnical engineering stability problems with large scale, high technical difficulty and high risk degree, such as tunnels, underground chambers, roadway support, slope stability, deep foundation pits, etc.

[0003] The expanding anchoring technology is one of the best ways to ensure the safe construction of the above projects, and its main function is to increase the bonding friction between the anchor body and the soil layer. However, the existing anchoring structures have insufficient anchoring force, complex structure, difficult manufacturing and high cost. Content of the Utility Model

[0004] In view of this, the utility model provides an expanding bolt with inclined plane sliding, which can solve the problems of insufficient anchoring force, complex structure, difficult manufacturing and high cost of the existing anchoring structures.

[0005] To solve the above technical problems, the utility model provides an expanding bolt with inclined plane sliding, and the expanding bolt includes:

[0006] An anchor rod body, a blocking head is arranged at the first end of the anchor rod body, an expanding mechanism is arranged at the second end of the anchor rod body, and the expanding mechanism can move axially along the anchor rod body;

[0007] At least two sleeve segments, the at least two sleeve segments are movably sleeved outside the anchor rod body and are limited between the blocking head and the expanding mechanism, and the adjacent surfaces between the adjacent sleeve segments are mutually matching inclined planes, and the adjacent sleeve segments can slide along the inclined plane under the push of the expanding mechanism to generate dislocation.

[0008] In some embodiments, optionally, the second end of the anchor rod body is provided with threads, the expanding mechanism includes a baffle and a nut, the baffle and the nut are sleeved outside the anchor rod body, and the baffle is located between the nut and the sleeve segment, and the nut is matched with the threads.

[0009] In some embodiments, optionally, a plurality of grouting holes are formed on the outer peripheral surface of each sleeve segment.

[0010] In some embodiments, optionally, the plurality of grouting holes are arranged in a plum blossom shape.

[0011] In some embodiments, optionally, there are at least three of the sleeve segments, and each of the sleeve segments except for the two sleeve segments located at the two ends has an inclined surface at both ends, and the inclined directions of the inclined surfaces at both ends of the same sleeve segment are opposite.

[0012] In some embodiments, optionally, the at least two sleeve segments are obtained by performing at least one inclined surface cutting on a single sleeve.

[0013] In some embodiments, optionally, the expanding bolt further includes a grouting pipe, the grouting pipe is fixedly connected to the expanding mechanism, and the slurry outlet of the grouting pipe is located in the peripheral area of the sleeve segment.

[0014] In some embodiments, optionally, positioning holes are formed in the baffle, the grouting pipe is fixedly arranged through the positioning holes, and the grouting pipe is arranged parallel to the bolt body.

[0015] In some embodiments, optionally, the blocking head is integrally formed with the bolt body.

[0016] In some embodiments, optionally, the adjacent surfaces between adjacent sleeve segments are bonded with glue.

[0017] The beneficial effects of the above technical solutions of the present utility model are as follows:

[0018] In the present utility model, at least two sleeve segments are sleeved on the outer periphery of the bolt body, and the sleeve segments are limited between the blocking head and the expanding mechanism. Then, the adjacent surfaces between adjacent sleeve segments are mutually matching inclined surfaces. By pushing the expanding mechanism, the adjacent sleeve segments slide along the inclined surfaces under the action of the extrusion force to generate a dislocation, thereby realizing expansion. This can greatly increase the frictional resistance in the axial direction of the expanding bolt, improve the tensile performance of the bolt, and the expansion process is simple and easy to operate, with a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the positional relationship between the sleeve segment and the bolt body provided by an embodiment of the present utility model;

[0020] Figure 2 It is a schematic diagram when no dislocation occurs between adjacent sleeve segments provided by an embodiment of the present utility model;

[0021] Figure 3 It is a schematic diagram when dislocation occurs between adjacent sleeve segments provided by an embodiment of the present utility model.

[0022] The reference numerals of the present utility model are as follows:

[0023] Expanding bolt 10, blocking head 11, thread 12, expanding mechanism 20, baffle 21, nut 22, sleeve segment 30, grouting hole 31, inclined surface 32, grouting pipe 40. Detailed implementation manners

[0024] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model fall within the scope of protection of the present utility model.

[0025] Anchoring technology has a wide range of applications in many fields such as high-rise buildings, rail transit, bridge and tunnel projects, etc.; the engineering community is facing a large number of geotechnical engineering stability problems such as large-scale tunnels, underground chambers, roadway support, slope stability, deep foundation pits, etc., with high technical difficulties and risk levels.

[0026] The expanding anchoring technology is one of the best ways to ensure the safe construction of the above projects. Its main function is to increase the bonding and frictional force between the anchor body and the soil layer. However, the existing anchoring structures have insufficient anchoring force, complex structures, difficult manufacturing, and high costs.

[0027] Therefore, the embodiments of the present utility model provide an expanding bolt with inclined-plane sliding. The expanding bolt includes a bolt body 10 and at least two sleeve segments 30. Among them, a blocking head 11 is provided at the first end of the bolt body 10, and an expanding mechanism 20 is provided at the second end of the bolt body 10. The expanding mechanism 20 can move axially along the bolt body 10; at least two sleeve segments 30 are movably sleeved outside the bolt body 10. That is to say, there is a certain gap between the sleeve segments 30 and the bolt body 10, and these sleeve segments 30 are limited between the blocking head 11 and the expanding mechanism 20. It can be understood that the radial dimensions of the blocking head 11 and the expanding mechanism 20 are larger than the outer diameter of the sleeve segments 30 to prevent the sleeve segments 30 from sliding out of the bolt body 10. In this embodiment, the adjacent surfaces between adjacent sleeve segments 30 are mutually matching inclined planes 32, and the adjacent sleeve segments 30 can slide along the inclined plane 32 under the push of the expanding mechanism 20 to generate dislocation.

[0028] Therefore, in the embodiments of the present utility model, at least two sleeve segments 30 are sleeved outside the bolt body 10, and the sleeve segments 30 are limited between the blocking head 11 and the expanding mechanism 20. Then, the adjacent surfaces between adjacent sleeve segments 30 are mutually matching inclined planes 32. By pushing the expanding mechanism 20, the adjacent sleeve segments 30 slide along the inclined plane 32 under the action of the extrusion force to generate dislocation, thereby realizing expansion. This can greatly increase the frictional resistance in the axial direction of the expanding bolt, improve the tensile performance of the bolt, and the expansion process is simple and easy to operate, with a simple structure and low cost.

[0029] In some embodiments, optionally, a thread 12 is provided at the second end of the anchor rod body 10. The body expanding mechanism 20 includes a baffle 21 and a nut 22. The baffle 21 and the nut 22 are sleeved outside the anchor rod body 10, and the baffle 21 is located between the nut 22 and the casing section 30. The nut 22 is engaged with the thread 12. In this embodiment, an external thread 12 can be provided at the second end of the anchor rod body 10. By using the nut 22 to cooperate with the thread 12 on the anchor rod body 10 and continuously screwing the nut 22 towards the casing section 30, the nut 22 can push the baffle 21, and then the baffle 21 can push the casing section 30, so that sliding occurs at the inclined surface 32 between adjacent casing sections 30, resulting in dislocation and achieving the body expanding effect. Moreover, the cooperation mode of the nut 22 and the thread 12 can facilitate the staff to accurately adjust the screwing-in amount of the nut 22, and then control the dislocation amount between adjacent casing sections 30.

[0030] In some other embodiments, optionally, a plurality of grouting holes 31 are formed on the outer peripheral surface of each casing section 30. After the body expanding anchor rod is inserted into the soil, grouting can be carried out around the body expanding anchor rod, and the grout can enter the casing section 30 through the grouting holes 31 and the dislocation positions between adjacent casing sections 30, filling up the gap between the casing section 30 and the anchor rod body 10. After solidification, it forms an integral force-bearing structure together with the body expanding anchor rod. The arrangement of the grouting holes 31 facilitates the injection of the grout and reduces the waiting time.

[0031] In some embodiments, optionally, the plurality of grouting holes 31 are arranged in a plum blossom shape. The grouting holes 31 arranged in a plum blossom pile can improve the injection effect of the grout and ensure that each part in the casing section 30 is filled with the grout.

[0032] In some embodiments of the present utility model, optionally, there are at least three casing sections 30. Each of the casing sections 30 except the two casing sections 30 at both ends has an inclined surface 32 at both ends. The inclined directions of the inclined surfaces 32 at both ends of the same casing section 30 are opposite. When the number of the casing sections 30 is at least three, the number of dislocation positions of the whole body expanding anchor rod can be increased, and then the axial frictional resistance can be increased. Among them, except for the casing sections 30 at both ends of the anchor rod body 10, each of the remaining casing sections 30 forms the above-mentioned inclined surface 32 at both ends, and the inclined directions of the inclined surfaces 32 at both ends of the same casing section 30 are arranged in the opposite direction, so that the dislocation is more reasonable and the axial frictional resistance is optimal.

[0033] In some embodiments, optionally, the at least two sleeve segments 30 are obtained by performing at least one inclined surface 32 cutting on a single sleeve. That is to say, the multiple sleeve segments 30 in this embodiment are obtained by performing inclined surface 32 cutting on a complete single sleeve. When two sleeve segments 30 need to be formed, only one inclined surface 32 cutting is required. When three sleeve segments 30 need to be formed, only two inclined surface 32 cuttings are required. Thus, the formation and processing of the sleeve segments 30 are simple, easy to operate, and have low costs.

[0034] In some other embodiments, optionally, the expanding bolt further includes a grouting pipe 40. The grouting pipe 40 is fixedly connected to the expanding mechanism 20, and the slurry outlet of the grouting pipe 40 is located in the peripheral area of the sleeve segment 30. That is to say, the expanding bolt in this embodiment is also attached with a grouting pipe 40. The grouting pipe 40 is fixed on the expanding mechanism 20, and the slurry outlet of the grouting pipe 40 is arranged in the peripheral area of the sleeve segment 30. Thus, it is convenient to grout into the inside and around the sleeve segment 30 through the grouting pipe 40. During construction, the expanding bolt and the grouting pipe 40 can be inserted into the soil together, without the need to insert the expanding bolt and the grouting pipe 40 separately, which simplifies the construction process.

[0035] In some embodiments, optionally, positioning holes are formed in the baffle 21, and the grouting pipe 40 is inserted and fixed in the positioning holes. The grouting pipe 40 is arranged parallel to the bolt body 10. By forming fixing holes in the baffle 21, it is convenient to directly insert and fix the grouting pipe 40 in the positioning holes, and as the position of the baffle 21 changes, the position of the grouting pipe 40 can be changed accordingly, so that the outlet of the grouting pipe 40 can be adjusted in time. And the grouting pipe 40 is arranged parallel to the bolt body 10, which is convenient for both of them to be inserted into the soil, minimizing the resistance as much as possible. After being inserted into the soil, the slurry outlet of the grouting pipe 40 is still located outside the sleeve segment 30.

[0036] In some embodiments of the present utility model, optionally, the blocking head 11 and the bolt body 10 are integrally formed. By adopting the integral forming process, the structural strength between the blocking head 11 and the bolt body 10 can be ensured, so as to effectively block the force exerted by the sleeve segment 30 on the blocking head 11 when the tightening nut 22 is tightened.

[0037] In some embodiments, optionally, the adjacent surfaces between the adjacent sleeve segments 30 are bonded with glue. By bonding the adjacent surfaces between the adjacent sleeve segments 30 with glue, it can be ensured that the sleeve segments 30 will not be misaligned during the process of inserting the expanding bolt into the soil, so as to avoid excessive frictional resistance after misalignment and make it difficult to insert the expanding bolt into the soil. And after being completely inserted in place, by applying a pre-tightening force through the nut 22, the adhesive force of the glue can be easily destroyed, and the adjacent sleeve segments 30 can be misaligned along the inclined surface 32, thus realizing expansion.

[0038] In summary, in the embodiment of the present utility model, at least two sleeve segments are sleeved on the outer periphery of the anchor rod body, and the sleeve segments are limited between the blocking head and the body expanding mechanism. Then, the adjacent surfaces between the adjacent sleeve segments are mutually matching inclined surfaces. By pushing the body expanding mechanism, the adjacent sleeve segments slide along the inclined surfaces under the action of the extrusion force to generate dislocation, thereby realizing body expansion. This can greatly increase the frictional resistance in the axial direction of the body-expanded anchor rod, improve the tensile performance of the anchor rod, and the body expansion process is simple and easy to operate, with a simple structure and low cost.

[0039] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the description and claims of the patent application of the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative position relationships, and when the absolute position of the object being described changes, the relative position relationships also change accordingly.

[0040] The above is the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An expansion bolt with inclined plane sliding, characterized in that The expandable bolt includes: A bolt body, with a blocking head provided at the first end of the bolt body, and an expanding mechanism provided at the second end of the bolt body, and the expanding mechanism can move axially along the bolt body; At least two sleeve segments, which are movably sleeved outside the bolt body and are limited between the blocking head and the expanding mechanism. The adjacent surfaces between adjacent sleeve segments are mutually cooperating inclined surfaces, and adjacent sleeve segments can slide along the inclined surfaces under the push of the expanding mechanism to generate dislocation.

2. The body-expanding anchor bolt according to claim 1, characterized in that, The second end of the bolt body is provided with a thread. The expanding mechanism includes a baffle and a nut. The baffle and the nut are sleeved outside the bolt body, and the baffle is located between the nut and the sleeve segments, and the nut is matched with the thread.

3. The body-expanding anchor bolt according to claim 1, wherein Each outer peripheral surface of the sleeve segment is provided with a plurality of grouting holes.

4. The expanding bolt according to claim 3, wherein The plurality of grouting holes are arranged in a plum blossom shape.

5. The body-expanding anchor bolt according to claim 1, wherein The sleeve segments are at least three. Each of the sleeve segments except the sleeve segments at both ends has an inclined surface at both ends, and the inclination directions of the inclined surfaces at both ends of the same sleeve segment are opposite.

6. The bulked anchor rod according to claim 1, wherein The at least two sleeve segments are obtained by performing at least one inclined surface cutting on a single sleeve.

7. The body-expanding anchor bolt according to claim 2, wherein, The expandable bolt further includes a grouting pipe, which is fixedly connected to the expanding mechanism, and the slurry outlet of the grouting pipe is located in the peripheral area of the sleeve segment.

8. The expandable bolt according to claim 7, wherein, The baffle is provided with a positioning hole, and the grouting pipe is fixedly arranged through the positioning hole, and the grouting pipe is arranged parallel to the bolt body.

9. The expanding bolt according to claim 1, wherein, The blocking head is integrally formed with the bolt body.

10. The body-expanding anchor bolt according to claim 1, characterized in that, The adjacent surfaces between adjacent sleeve segments are bonded with glue.

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