Anchoring structure used in tunnel interbed rock mass

Abstract

The utility model belongs to the technical field of anchor rods, and discloses an anchoring structure used in tunnel interbed rock mass, which comprises a hollow anchor rod body, a lower pressing block is spirally connected in the hollow anchor rod body, the bottom end of the lower pressing block is slidably connected with a sliding block, a push rod is rotatably connected in the sliding block, and the push rod is rotatably connected with the bottom end of the lower pressing block. And the outer side of the push rod is rotationally connected with an extrusion rod, the two ends of the extrusion rod are rotationally connected with supporting rods, three limiting blocks are connected into a lower pressing block in a penetrating and inserting mode, and the top ends of the limiting blocks are fixedly connected with rotating rods. The problems that an anchor rod is poor in practical performance, high in limitation and incapable of effectively anchoring rock masses of interrock strata, and the collapse probability of rocks at the top of a tunnel is increased are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of anchor bolts, and specifically relates to an anchoring structure for interlayer rock masses in tunnels. Background Technique

[0002] An anchor bolt is a support and reinforcement element widely used in the fields of geotechnical engineering and mining engineering. In tunnel engineering, for the situation where there are broken rock masses at the top, the suspension effect of the anchor bolt can effectively prevent the collapse of the top rocks, increase the safety of the tunnel, and provide a safe construction environment for construction workers.

[0003] Meanwhile, an anchor bolt structure of a tunnel support formwork with the application number 202321496665.7 includes a hollow anchor bolt. Fixed blocks are fixedly installed on both the left and right sides of the hollow anchor bolt. A rotating shaft is rotatably connected inside the fixed block. A support rod is fixedly connected to the surface of the rotating shaft. The utility model can adjust the angle of the support rod by installing the fixed block and rotating the rotating shaft, so that the fixed head can be inserted into the hole against the wall. Under the action of the elastic force of the spring, the fixed head always adheres to the hole wall. When the anchor bolt is inserted to the bottom of the hole, a pulling force towards the outside of the hole is increased by a machine. At this time, since the limit block is fixed on the hollow anchor bolt and contacts one end of the support rod close to the hollow anchor bolt, when the anchor bolt is pulled back towards the outside of the hole, the fixed head will be inserted into the soil to fix the support rod in the hole, increasing the anchor force and improving the safety of the support.

[0004] During the use of an existing anchor bolt structure of a tunnel support formwork, the use of a support rod improves the anchoring ability of the anchor bolt in the soil. However, its structure is not applicable to hard rocks, the practical performance of the anchor bolt is poor, the limitations are high, and it cannot effectively anchor the interlayer rock mass.

[0005] Therefore, an anchoring structure for interlayer rock masses in tunnels is proposed to solve the above problems. Content of the Utility Model

[0006] To solve the problems raised in the above background technique, the utility model provides an anchoring structure for interlayer rock masses in tunnels, which has the advantage of increasing the anchoring ability of the anchor bolt in the interlayer rock mass.

[0007] To achieve the above object, the utility model provides the following technical solution: An anchoring structure for interlayer rock masses in tunnels includes a hollow anchor bolt body. A pressing block is spirally connected inside the hollow anchor bolt body. A slider is slidably connected to the bottom end of the pressing block. A push rod is rotatably connected inside the slider. An extrusion rod is rotatably connected to the outside of the push rod. Support rods are rotatably connected to both ends of the extrusion rod. Three limit blocks are inserted and connected inside the pressing block. A rotating rod is fixedly connected to the top end of the limit block.

[0008] Preferably, a grout stopper is slidably connected to the outside of the hollow anchor rod body. A groove is formed inside the grout stopper. A tapered ring is screwed inside the groove. A crank is fixedly connected to the top end of the tapered ring.

[0009] Preferably, a connecting ring block is fixedly connected to the bottom end of the hollow anchor rod body. A spiral groove is formed in the upper part of the hollow anchor rod body.

[0010] Preferably, an anchor head is screwed to the outside of the connecting ring block. A spring is embedded inside the anchor head. One end of the spring is fixedly connected to a clamping block.

[0011] Preferably, a T-shaped ring groove is formed at the bottom end of the pressing block, and the slider slides inside the T-shaped ring groove.

[0012] Preferably, a support is rotatably connected inside the support rod, and one end of the support is fixedly connected to the inner wall of the hollow anchor rod body.

[0013] Preferably, two groups of U-shaped handles are symmetrically connected to the upper part of the rotating rod, and an anti-slip sleeve is sleeved on the outside of the U-shaped handle.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By arranging structures such as the hollow anchor rod body, the pressing block, the slider, the push rod, the extrusion rod, the support rod, the limiting block and the rotating rod to cooperate with each other, the extrusion rod abuts against the inner wall of the anchor hole, so that when anchoring the rock mass of the tunnel interlayer, especially when drilling and anchoring vertically upward, the anchor rod can be effectively fitted and fixed with the anchor hole, which is convenient for subsequent grouting treatment, improves the anchoring performance and reduces the labor intensity of construction workers.

[0016] 2. By arranging structures such as the grout stopper, the groove, the tapered ring and the crank, the existing grout stopper is usually adapted to the anchor rod and has a fixed size. Sometimes it cannot effectively block the injection material, which is easy to cause waste of resources. The user can turn the tapered ring into the groove to gradually increase the size of the grout stopper, which is suitable for the grout stopping of larger-range anchor holes, and can also make the grout stopper fit more closely with the inner wall of the anchor hole, improving its working performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic sectional view of the present utility model;

[0019] Figure 3 is a schematic sectional view of the pressing block of the present utility model;

[0020] Figure 4 Schematic cross-sectional view of the grout plug of the present utility model;

[0021] Figure 5 For the present utility model Figure 2 Schematic view of the structure at position A;

[0022] Figure 6 For the present utility model Figure 2 Schematic view of the structure at position B. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1 to 6 shown, the present utility model provides an anchoring structure for interlayer rock masses in tunnels, including a hollow anchor rod body 1. A pressing block 2 is spirally connected inside the hollow anchor rod body 1. A sliding block 3 is slidably connected to the bottom end of the pressing block 2. A push rod 4 is rotatably connected inside the sliding block 3. The number of push rods 4 is symmetrically provided with two. An extrusion rod 5 is rotatably connected to the outside of the push rod 4. Support rods 6 are rotatably connected to both ends of the extrusion rod 5. Three limiting blocks 7 are inserted and connected inside the pressing block 2. A rotating rod 8 is fixedly connected to the top end of the limiting block 7. The rotating rod 8 is longer than the length of the hollow anchor rod body 1.

[0025] Specifically, a grout plug 9 is slidably connected to the outside of the hollow anchor rod body 1. A groove 10 is opened inside the grout plug 9. A tapered ring 11 is spirally connected inside the groove 10. The tapered ring 11 gradually turns into the inside of the groove 10, which can gradually increase the size of the grout plug 9 and is suitable for grout plugging of anchor holes in a larger range. A crank 12 is fixedly connected to the top end of the tapered ring 11.

[0026] Furthermore, a connecting ring block 13 is fixedly connected to the bottom end of the hollow anchor rod body 1. A spiral groove 14 is opened in the upper part of the hollow anchor rod body 1. When the length of the anchor rod is insufficient, it is convenient for construction workers to perform length connection on the hollow anchor rod body 1 and improve its service performance.

[0027] Still further, an anchor head 15 is spirally connected to the outside of the connecting ring block 13. A spring 16 is embedded inside the anchor head 15. One end of the spring 16 is fixedly connected to a clamping block 17. When the anchor head 15 is inserted into the connecting ring block 13, under the action of the spring 16, the clamping block 17 will be pushed to embed into the inside of the anchor head 15 for fixing it, reducing the labor intensity of construction workers and facilitating installation and disassembly.

[0028] It should be noted that a T-shaped ring groove 18 is formed at the bottom end of the pressing block 2, and the slider 3 slides inside the T-shaped ring groove 18. The cross-sectional areas of the slider 3 and the T-shaped ring groove 18 are the same, which restricts the position of the slider 3 and enables it to work properly.

[0029] It is worth noting that a support 19 is rotatably connected inside the support rod 6, and one end of the support 19 is fixedly connected to the inner wall of the hollow anchor rod body 1, which plays a supporting role and facilitates the rotation of the support rod 6.

[0030] It is worth introducing that two groups of U-shaped handles 20 are symmetrically connected to the upper part of the rotating rod 8, and an anti-slip sleeve 21 is sleeved outside the U-shaped handle 20. Under the action of the anti-slip sleeve 21, it can prevent the hands of construction workers from slipping and facilitate the application of pressure to the U-shaped handle 20.

[0031] Among them, the anchor head 15 is prior art and will not be elaborated; at the same time, the present invention also includes a power source, a controller, a switch, etc., which are not the main technical points of this patent and will not be elaborated.

[0032] Working principle and process:

[0033] When construction workers anchor the rock mass of the tunnel interlayer, especially when drilling holes vertically upward for anchoring, at this time, the anchor head 15 is inserted into the inside of the connecting ring block 13. Under the action of the spring 16, the clamping block 17 will be pushed to embed into the inside of the anchor head 15 to fix it, reducing the labor intensity of construction workers and facilitating installation and disassembly. Then, drill holes in the tunnel interlayer rock mass. After the drilling is completed, remove the anchor head 15, insert the hollow anchor rod body 1 into the anchor hole. At this time, insert the rotating rod 8 into the inside of the hollow anchor rod body 1, so that the three limiting blocks 7 fixedly connected to one end of the rotating rod 8 are embedded into the inside of the pressing block 2. Drive the rotating rod 8 and the pressing block 2 to rotate together through the U-shaped handle 20. Under the action of the anti-slip sleeve 21, it can prevent the hands of construction workers from slipping, enabling the effective rotation of the rotating rod 8. The pressing block 2 moves inside the hollow anchor rod body 1. A T-shaped ring groove 18 is provided at the bottom end of the pressing block 2. Therefore, the slider 3 will be pushed to move inside the T-shaped ring groove 18, and the slider 3 pushes the push rod 4 to move outward from the hollow anchor rod body 1. Under the action of the support rod 6 and the support 19 rotatably connected at both ends, the push rod 4 plays a supporting role, enabling it to horizontally apply pressure to the inner wall of the anchor hole, increasing the contact area between the hollow anchor rod body 1 and the inner wall of the anchor hole, improving the anchoring performance of the hollow anchor rod body 1 inside the interlayer rock mass, preventing it from falling off, facilitating subsequent grouting treatment, increasing the anchoring performance, and reducing the labor intensity of construction workers. Then, rotate the crank 12 to drive the tapered ring 11 to gradually rotate into the inside of the groove 10, so that the size of the grout stopper 9 gradually increases, suitable for the grout stopping function of a larger range of anchor holes, and can also make the grout stopper 9 fit more closely with the inner wall of the anchor hole, increasing its working performance. When starting to grout, take out the rotating rod 8 from the inside of the hollow anchor rod body 1 and grout and fix the hollow anchor rod body 1 to improve the bearing capacity and durability of the anchor rod.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anchoring structure for use in interlayered rock mass in a tunnel, comprising a hollow anchor body (1), characterized in that: The hollow anchor rod body (1) is spirally connected to a lower pressure block (2) inside, the bottom end of the lower pressure block (2) is slidably connected to a slider (3), the slider (3) is rotatably connected to a push rod (4) inside, the push rod (4) is rotatably connected to an extrusion rod (5) outside, the extrusion rod (5) is rotatably connected to support rods (6) at both ends, the lower pressure block (2) is interlaced with three limit blocks (7), and the top end of the limit block (7) is fixedly connected to a rotating rod (8).

2. The anchoring structure for use in interlayered rock mass in a tunnel according to claim 1, characterized in that: A grout stopper (9) is slidably connected to the outer side of the hollow anchor body (1), a groove (10) is provided inside the grout stopper (9), a cone ring (11) is spirally connected inside the groove (10), and a crank handle (12) is fixedly connected to the top end of the cone ring (11).

3. The anchoring structure for use in interlayered rock mass in a tunnel according to claim 1, characterized in that: A connecting ring block (13) is fixedly connected to the bottom end of the hollow anchor body (1), and a spiral groove (14) is provided on the upper part of the hollow anchor body (1).

4. The anchoring structure for use in interlayered rock mass in a tunnel according to claim 3, characterized in that: The outer side of the connecting ring block (13) is spirally connected to an anchor head (15), the interior of the anchor head (15) is inlaid with a spring (16), and one end of the spring (16) is fixedly connected to a clamping block (17).

5. The anchoring structure for use in interlayered rock mass in a tunnel according to claim 1, characterized in that: A T-shaped ring groove (18) is provided at the bottom end of the lower pressing block (2), and the sliding block (3) slides inside the T-shaped ring groove (18).

6. The anchoring structure for use in interlayered rock mass in a tunnel according to claim 1, characterized in that: The support rod (6) is rotatably connected to a support seat (19) inside, and one end of the support seat (19) is fixedly connected to the inner wall of the hollow anchor rod body (1).

7. The anchoring structure for use in interlayered rock mass in a tunnel according to claim 1, characterized in that: Two groups of U-shaped handles (20) are symmetrically connected to the upper part of the rotating rod (8), and the outer sides of the U-shaped handles (20) are covered with anti-slip covers (21).

Images