Roadway maintenance anchor rod lengthening fixing structure

Abstract

The utility model relates to roadway maintenance technical field and disclose a kind of roadway maintenance anchor rod lengthening fixed structure, including bar, its top end is provided with internal thread, first connecting piece, is connected with bar top end by thread;Connecting seat, fixedly connected at the top of first connecting piece, internal thread hole is provided on connecting seat;Second connecting piece, and internal thread hole of connecting seat thread cooperation;Locking member, thread connection is on second connecting piece;Supporting piece, thread connection is on second connecting piece and with locking member, the end of supporting piece is provided with limit surface, and limit surface is provided with limit piece, for the displacement of constraint supporting piece;The utility model can solve the problem that the roadway surrounding rock can be disturbed twice in prior art, destroy original stress balance, increase surrounding rock instability risk, cannot guarantee the long-term stability of support.

Description

Technical Field

[0001] This utility model relates to the field of tunnel maintenance technology, specifically to a tunnel maintenance anchor bolt extension and fixing structure. Background Technology

[0002] In mining, underground tunnel construction and maintenance projects, anchor bolt support is a key technical means to ensure tunnel stability and prevent surrounding rock collapse. As the service life of the tunnel increases or is affected by changes in geological stress, the original anchor bolts may be insufficient in length and unable to effectively anchor the surrounding rock. It is necessary to lengthen and repair the anchor bolts to restore and improve the support effect.

[0003] Currently, the common method for extending anchor bolts during tunnel maintenance is to replace them with brand new long anchor bolts, which requires re-drilling and installation, making the process complex.

[0004] However, re-drilling will cause secondary disturbance to the surrounding rock of the roadway, disrupt the original stress balance, increase the risk of rock instability, and fail to guarantee the long-term stability of the support. Utility Model Content

[0005] This utility model provides a tunnel maintenance anchor bolt extension and fixing structure. A first connector is connected to the bolt to extend its length. A second connector is connected to the first connector. A support and locking member are then threaded onto the second connector, allowing them to engage. A limiting member on the support member constrains the bolt's position, thereby solving the problem mentioned in the background art of increasing the risk of surrounding rock instability and failing to guarantee the long-term stability of the support.

[0006] This utility model provides the following technical solution:

[0007] An extended and fixed structure for roadway maintenance anchor bolts includes a rod with an internal thread at its top end, and further includes: a first connector connected to the top end of the rod via the thread; a connecting seat fixedly connected to the top of the first connector, the connecting seat having an internal threaded hole; a second connector threadedly engaged with the internal threaded hole of the connecting seat; a locking member threadedly connected to the second connector; and a support member threadedly connected to the second connector and abutting against the locking member, the end of the support member having a limiting surface, and a limiting element provided on the limiting surface for constraining the displacement of the support member.

[0008] As a preferred embodiment of the present invention, the first connecting member includes a first screw, the bottom end of the first screw is threadedly connected to the internal thread at the top end of the rod, and the connecting seat is fixedly connected to the top of the first screw.

[0009] As a preferred embodiment of the present invention, the second connecting member includes a second screw threadedly connected to the connecting seat, and both the locking member and the supporting member are threadedly connected to the second screw.

[0010] As a preferred embodiment of this utility model, the support member includes a tray, and the limiting member is disposed on the top surface of the tray.

[0011] As a preferred technical solution of this utility model, the limiting member includes at least six sets of curved protrusions arranged circumferentially on the surface of the tray.

[0012] As a preferred technical solution of this utility model, the limiting member includes at least ten sets of tips arranged circumferentially on the surface of the tray.

[0013] As a preferred technical solution of this utility model, the limiting member includes at least eight sets of grooves circumferentially formed on the surface of the tray.

[0014] As a preferred embodiment of this utility model, the locking component includes a locking nut threaded onto the second screw, and the locking nut abuts against the bottom of the tray.

[0015] Compared with the prior art, this utility model provides an extended fixing structure for roadway maintenance anchor bolts, which has the following beneficial effects:

[0016] 1. In this roadway maintenance anchor bolt extension and fixing structure, the limiting component on the top surface of the tray can contact the surface of the roadway surrounding rock. When the locking nut is rotated and raised, the tray can apply pressure to the roadway surrounding rock to achieve stable support. At the same time, it can also prevent the tray from loosening due to the squeezing of the roadway surrounding rock, further improving the stability of the anchor bolt extension and fixing structure.

[0017] 2. In this roadway maintenance anchor bolt extension and fixing structure, different types of limiting components can be selected according to the actual situation of the roadway surrounding rock to adapt to different geological conditions and construction needs. This improves the adaptability and practicality of the anchor bolt extension and fixing structure, and solves the problem that existing technologies may cause secondary disturbance to the roadway surrounding rock, disrupt the original stress balance, increase the risk of surrounding rock instability, and fail to guarantee the long-term stability of the support.

[0018] The parts of this device not covered are the same as or can be implemented using existing technologies. This utility model can solve the problem that existing technologies cause secondary disturbance to the surrounding rock of the roadway, disrupt the original stress balance, increase the risk of surrounding rock instability, and cannot guarantee the long-term stability of the support. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0020] Figure 1 This is a three-dimensional structural diagram of a tunnel maintenance anchor bolt extension and fixing structure proposed in this utility model;

[0021] Figure 2 This is a structural schematic diagram of a tunnel maintenance anchor bolt extension and fixing structure member proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the first screw of the tunnel maintenance anchor bolt extension and fixing structure proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the second screw in the tunnel maintenance anchor bolt extension and fixing structure proposed in this utility model;

[0024] Figure 5 This is a schematic diagram of the tip of the tray of the tunnel maintenance anchor bolt extension and fixing structure proposed in this utility model;

[0025] Figure 6 This is a schematic diagram of the groove on the tray of the tunnel maintenance anchor bolt extension and fixing structure proposed in this utility model.

[0026] In the diagram: 1. Rod; 2. Self-feeding drill bit; 3. First screw; 4. Connecting seat; 5. Second screw; 6. Locking nut; 7. Tray; 701. Curved protrusion; 702. Tip; 703. Groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In mining, underground tunnel construction and maintenance projects, anchor bolt support is a key technical means to ensure tunnel stability and prevent surrounding rock collapse. As the service life of the tunnel increases or is affected by changes in geological stress, the original anchor bolts may become too short to effectively anchor the surrounding rock. It is necessary to lengthen and repair the anchor bolts to restore and improve the support effect. The common way to lengthen anchor bolts in tunnel maintenance is to replace them with brand new long anchor bolts. This requires re-drilling and installation, which is a complicated process. However, re-drilling will cause secondary disturbance to the surrounding rock, disrupt the original stress balance, increase the risk of surrounding rock instability, and fail to guarantee the long-term stability of the support. Example

[0029] Reference Figures 1-6 A tunnel maintenance anchor bolt extension and fixing structure includes a rod 1 with a self-drilling bit 2 at its bottom for fixing in the tunnel under maintenance. An internal thread is formed at the top of the rod 1, and the top of the rod 1 is threadedly connected to a first connecting member. The first connecting member includes a first screw 3, the bottom of which is threaded onto the internal thread at the top of the rod 1. A connecting seat 4 is fixedly connected to the top of the first screw 3, extending the original rod 1 and achieving a quick and stable connection without re-drilling. Furthermore, all materials used in this device are high-strength alloy steel, ensuring the connection structure withstands the complex stress environment of the tunnel. For long-term stability, secondly, an internal threaded hole is provided on the connecting seat 4, and a second connecting member is threaded into the internal threaded hole. The second connecting member includes a second screw 5 threadedly connected to the connecting seat 4. A locking member and a support member are both threadedly connected to the second screw 5. A support member is also connected to the second screw 5 and abuts against the locking member. A limiting surface is provided at the end of the support member, and a limiting member is provided on the limiting surface to constrain the displacement of the support member. The support member includes a tray 7, and the limiting member is provided on the top surface of the tray 7. The locking member includes a locking nut 6 threadedly connected to the second screw 5, and the locking nut 6 abuts against the bottom of the tray 7.

[0030] In the above scheme, the limiting component on the top surface of the tray 7 can contact the surface of the surrounding rock of the roadway. When the locking nut 6 rotates and rises, the tray 7 can apply pressure to the surrounding rock of the roadway to achieve stable support. At the same time, it can also prevent the tray 7 from loosening due to the squeezing of the surrounding rock of the roadway, further improving the stability of the anchor bolt extension and fixing structure.

[0031] Furthermore, the limiting component includes six sets of curved protrusions 701 arranged circumferentially on the surface of the tray 7. The design of the curved protrusions 701 can increase the contact area between the tray 7 and the surrounding rock of the tunnel. At the same time, the curved structure can better embed into the surface of the surrounding rock of the tunnel, improving the stability and firmness of the connection.

[0032] Reference Figure 5 and Figure 6In other embodiments, the limiting member may also include ten sets of circumferentially arranged tips 702 on the surface of the tray 7, or eight sets of circumferentially opened grooves 703 on the surface of the tray 7. The tips 702 have stronger penetrating power and gripping power, and can more effectively anchor into the surrounding rock of the tunnel to prevent the tray 7 from sliding due to the compression of the surrounding rock of the tunnel. The design of the grooves 703 can form more interlocking points between the tray 7 and the surrounding rock of the tunnel, further improving the stability of the connection.

[0033] The different designs of these limiting components can be selected according to the actual conditions of the surrounding rock of the roadway to adapt to different geological conditions and construction needs, thereby improving the adaptability and practicality of the anchor bolt extension and fixing structure. This solves the problem that the existing technology will cause secondary disturbance to the surrounding rock of the roadway, destroy the original stress balance, increase the risk of surrounding rock instability, and fail to guarantee the long-term stability of the support.

[0034] In summary, the extended anchor bolt fixing structure for roadway maintenance, consisting of rod 1, self-drilling bit 2, first screw 3, connecting seat 4, second screw 5, locking nut 6, and tray 7, is made of alloy steel. The ingenious connection between the components enables a quick and stable connection without the need for re-drilling. Furthermore, it boasts advantages such as simple structure, convenient operation, and high stability, making it suitable for various roadway maintenance anchor bolt extension needs.

[0035] Components not described in detail in this article are existing technologies.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tunnel maintenance anchor bolt extension and fixing structure, comprising a rod (1) having an internal thread at its top, characterized in that, Also includes: The first connector is threaded to the top of the rod (1); The connecting seat (4) is fixedly connected to the top of the first connecting member, and the connecting seat (4) has an internal thread hole; The second connector is threaded into the internal threaded hole of the connector (4); The locking element is threadedly connected to the second connecting element; The support member is threadedly connected to the second connector and abuts against the locking member. The end of the support member is provided with a limiting surface, and a limiting member is provided on the limiting surface to constrain the displacement of the support member.

2. The tunnel maintenance anchor bolt extension and fixing structure according to claim 1, characterized in that, The first connector includes a first screw (3), the bottom end of which is threaded to the internal thread at the top of the rod (1), and the connecting seat (4) is fixedly connected to the top of the first screw (3).

3. The tunnel maintenance anchor bolt extension and fixing structure according to claim 2, characterized in that, The second connector includes a second screw (5) threaded onto the connector (4), and both the locking member and the support member are threaded onto the second screw (5).

4. A tunnel maintenance anchor bolt extension and fixing structure according to claim 2 or 3, characterized in that, The support includes a tray (7), and the limiting member is disposed on the top surface of the tray (7).

5. The tunnel maintenance anchor bolt extension and fixing structure according to claim 4, characterized in that, The limiting member includes at least six sets of curved protrusions (701) arranged circumferentially on the surface of the tray (7).

6. The tunnel maintenance anchor bolt extension and fixing structure according to claim 4, characterized in that, The limiting member includes at least ten sets of tips (702) arranged circumferentially on the surface of the tray (7).

7. The tunnel maintenance anchor bolt extension and fixing structure according to claim 4, characterized in that, The limiting member includes at least eight sets of circumferentially formed grooves (703) on the surface of the tray (7).

8. The tunnel maintenance anchor bolt extension and fixing structure according to claim 3, characterized in that, The locking element includes a locking nut (6) threaded onto the second screw (5), the locking nut (6) abutting against the bottom of the tray (7).

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