Explosive cartridge external fixing device of tunnel anchor rod

Abstract

The utility model discloses an external explosive cartridge fixing device of a tunnel anchor rod in the technical field of anchor rod reinforcement, which comprises an explosive cartridge, a connecting rod and an anchor rod, the brittleness of the explosive cartridge is increased, an explosive cartridge can be directly arranged in the explosive cartridge for temporary storage, then the device can be integrally arranged in an anchor hole through the anchor rod, and in the whole embedding process, the explosive cartridge can be directly arranged in the explosive cartridge for temporary storage. The cartridge is sealed in the cartridge case, so that the device can ensure that the cartridge does not flow out of the anchor hole whether the device faces upwards or downwards, and when the device stirs the cartridge, the cartridge does not need to be pushed and extruded out, force is directly applied to press and crack the cartridge case, and the whole cartridge can be released in the anchor hole from the cartridge case. The cartridge of the device is not located in an interlayer of the anchor rod and the outer cylinder, but located at the front end of the anchor rod to form a longitudinal splicing state, when the cartridge is placed in the anchor rod, the cartridge is located at the front end of the anchor rod, the anchor rod extrudes and stirs inwards, the cartridge is pressed and fully stirs, and therefore the anchor rod is anchored in an anchor hole through the cartridge.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt reinforcement technology, and in particular to an external fixing device for a tunnel anchor bolt. Background Technology

[0002] With the increasing demand for road construction in my country, a large number of infrastructure projects, including highways, railways, and urban culverts, have been built. Among these, underground tunnel engineering is an extremely important component. Anchor bolt support is commonly used in tunnel support construction. Installing anchor bolts inside the tunnel can effectively increase the structural strength of the tunnel, making it safer and extending its service life. A common method for reinforcing tunnels with anchor bolts is to drill holes inside the tunnel to form anchor holes, then insert resin or cement cartridges, and finally use these cartridges to bond and fix the anchor bolts into the anchor holes.

[0003] Conventional resin anchor cartridges are prone to breakage before reaching the bottom of the hole, affecting anchoring effectiveness. Built-in cartridge anchors have a double-layer structure: an inner steel anchor and an outer steel sleeve. The sleeve isolates the surrounding soil and ensures accurate delivery of the cartridge into the anchor hole. In contrast, conventional cartridge anchors are pushed in from the rear and then pushed out from the front, entering the anchor hole through a pre-drilled hole. Since the cartridge is initially positioned between the sleeve and the anchor, it carries a limited amount of explosive, leading to insufficient explosive charge during anchor insertion.

[0004] Because of the sleeve design, the sleeve diameter is slightly smaller than the anchor hole diameter, and the anchor bolt is anchored by directly anchoring the sleeve. This can easily lead to insufficient explosive charge in the anchoring section, affecting the anchoring effect and durability. Furthermore, the anchor bolt and sleeve are bolted together, and due to limitations in the anchor hole diameter and anchor bolt diameter, the bolting requires high strength and durability, all of which pose challenges to tunnel reinforcement construction.

[0005] Based on this, this utility model designs an external fixing device for the explosive cartridge of a tunnel anchor bolt to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an external fixing device for the explosive cartridge of a tunnel anchor bolt. This device incorporates a brittle cartridge, allowing the explosive cartridge to be placed directly inside for temporary storage. The entire device can then be inserted into the anchor hole via the anchor bolt. Throughout the insertion process, the explosive cartridge remains enclosed within the cartridge, ensuring that it does not leak out of the anchor hole regardless of whether the device is facing upwards or downwards. Furthermore, when agitating the explosive cartridge, the device does not require pushing or squeezing it out; instead, it directly applies force to compress and crack the cartridge, releasing the entire cartridge into the anchor hole. The explosive cartridge is not located between the anchor bolt and the outer cartridge; rather, it is positioned at the front end of the anchor bolt, forming a longitudinal connection. When inserted into the anchor bolt, the cartridge is at the front end. As the anchor bolt presses downwards, the cartridge is compressed and flows. The anchor bolt further compresses and agitates the cartridge, ensuring thorough agitation. Consequently, the anchor bolt is anchored within the anchor hole via the explosive cartridge.

[0007] This utility model is implemented as follows: an external fixing device for the explosive cartridge of a tunnel anchor bolt, comprising:

[0008] cartridge case, connecting rod, and anchor bolt;

[0009] The cartridge is a hollow straight tube with an open front end, and the inner cavity of the cartridge is also filled with a medicine roll.

[0010] The connecting rod is a circular tube with an open rear end. Multiple stirring heads are attached to the outer wall of the connecting rod. The stirring heads protrude from the side wall of the connecting rod and are integral with the connecting rod. The front end of the connecting rod is closed.

[0011] The connecting rod is fixedly connected to the top of the cartridge, and the inner cavity of the cartridge is isolated from the inner cavity of the connecting rod;

[0012] The inner hole of the connecting rod is a threaded hole;

[0013] The anchor rod is a straight rod, and the anchor rod is locked in the threaded hole at the rear end of the connecting rod;

[0014] The connecting rod has the same outer diameter as the cartridge.

[0015] Furthermore, the cartridge is a transparent PC round tube; a connecting pipe is threaded onto the front end of the cartridge, the connecting pipe is a round tube with openings at both ends, and multiple connecting pipes are connected end to end by threads to form a whole round tube;

[0016] The connecting pipe has the same outer diameter as the cartridge.

[0017] Furthermore, the connecting rod is a PC round tube, and the stirring head and the connecting rod are an integral structure.

[0018] Furthermore, the inner diameter of the cartridge is not less than the same as the diameter of the cartridge.

[0019] The drug cartridge is a viscous resin anchoring agent.

[0020] Furthermore, a sealing plug is provided at the front end of the cartridge, the sealing plug being a PV flat plate, which covers the front opening of the cartridge or the connecting pipe.

[0021] The beneficial effects of this utility model are: 1. This device adds a brittle cartridge and fills the cartridge with a drug roll, so that the drug roll can be pushed into the anchor hole along with the cartridge. The brittle nature of the cartridge can break when subjected to greater pressure or stirring force, thereby releasing the drug roll from the cartridge. This allows the drug roll to be easily placed in the deepest part of the anchor hole along with the cartridge, and can also be easily and completely released, making the cartridge filling construction easier and more convenient.

[0022] 2. No additional outer sleeve structure is added to the anchor bolt of this device. The thickness of the anchor bolt can be directly referenced by the diameter of the anchor hole. Therefore, this device can use thicker anchor bolts, as long as they can be smoothly inserted into the anchor hole. Thicker anchor bolts result in higher structural strength, reinforcement of the anchor hole in the tunnel, and stronger support for the tunnel structure.

[0023] 3. Because this device facilitates the insertion of the explosive cartridge, filling the entire anchor hole from the outside to the inside, it improves the installation quality and positioning accuracy of the prestressed anchor bolts. It also reduces the reduction in support effect caused by improper installation of prestressed anchor bolts, effectively reducing the impact on tunnel durability and service life due to improper installation, lowering the cost of subsequent treatment and construction, and improving construction efficiency. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the connecting rod and anchor rod in the assembled state of this utility model;

[0027] Figure 3 This is a schematic diagram showing the disassembled state of the anchor rod and connecting rod of this utility model;

[0028] Figure 4 This is a schematic diagram of the multiple connecting pipe structures of this utility model;

[0029] Figure 5 This is a schematic diagram of the internal structure of the connecting rod and anchor rod in the assembled state of this utility model;

[0030] Figure 6 A schematic diagram showing the state of the anchor bolt and the outer sleeve filled with an anchoring agent cartridge in the prior art.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1-Medicine cartridge, 11-Medicine roll, 12-Continuous connector, 13-Sealing plug, 2-Connecting rod, 21-Stirring head, 3-Anchor bolt, 31-Outer sleeve, 4-Anchor hole. Detailed Implementation

[0033] Please see Figures 1 to 6 As shown, this utility model provides an external fixing device for the explosive cartridge of a tunnel anchor bolt. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.

[0034] In a specific embodiment of the technical solution of this utility model:

[0035] Includes cartridge case 1, connecting rod 2, and anchor bolt 3;

[0036] The cartridge 1 is a hollow straight tube with an open front end.

[0037] The cartridge 1 is a rigid, brittle, transparent plastic round tube made of PC, which facilitates observation of the insertion of the cartridge 11. The cartridge 1 has a certain rigidity, making it suitable for insertion into the anchor hole 4, but it is easily broken under pressure and remains in the anchor hole 4 to form an adhesive skeleton, which is bonded to the anchor rod 3 to form an integral load-bearing structure. The front end of the cartridge 1 is threaded with a connecting pipe 12. The connecting pipe 12 is a round tube with open ends. Multiple connecting pipes 12 are connected end to end by threads to form an integral round tube. The connecting pipes 12 are connected to the front end of the cartridge 1 to different lengths. Different numbers of connecting pipes 12 can be connected according to the depth of the anchor hole 4. This threaded connection structure is the same as the connection method of PVC water pipe. One end of the connecting pipe 12 is male and the other end is female. The male and female ends are connected together. The outer diameter of the connecting pipe 12 is the same as that of the cartridge 1.

[0038] The inner cavity of the cartridge 1 is also filled with a pill roll 11; the inner diameter of the cartridge 1 is not less than the same as the diameter of the pill roll 11, so the pill roll 11 is adhered and filled inside the cartridge 1.

[0039] A sealing plug 13 is provided at the front end of the cartridge 1. The sealing plug 13 is a PV flat plate. The sealing plug 13 covers the opening at the front end of the cartridge 1 to block the opening at the front end of the cartridge 1. At the same time, the sealing plug 13 is a round plug, which can be inserted into the inside of the cartridge 1 to block it. It can be tightly sealed by interference fit or sealed by thread. Similarly, the sealing plug 13 can also be inserted into the front opening of the connecting pipe 12 to block the opening. As long as the medicine roll 11 is blocked inside the cartridge 1.

[0040] Cartridge 11 is a viscous resin anchoring agent. This viscous anchoring agent can effectively bond the anchor hole 4 and the anchor rod 3, and is a commonly used material for reinforcing tunnel anchor rods 3. In this device, cartridge 11 is formed by winding the anchoring agent, which reduces its fluidity, enhances its plasticity, and makes it less prone to flow and detachment due to gravity.

[0041] The connecting rod 2 is a round tube with an open rear end. Multiple stirring heads 21 are attached to the outer wall of the connecting rod 2. The stirring heads 21 protrude from the side wall of the connecting rod 2 and the stirring heads 21 and the connecting rod 2 are an integral structure. The front end of the connecting rod 2 is closed. The connecting rod 2 is a PC round tube. The stirring heads 21 and the connecting rod 2 are an integral structure. The outside of the connecting rod 2 is covered with stirring heads 21, thus forming a stirring paddle effect, which can effectively stir the medicine roll 11 in the anchor hole 4 through the stirring heads 21.

[0042] The connecting rod 2 is fixedly connected to the top of the cartridge 1, and the inner cavity of the cartridge 1 is isolated from the inner cavity of the connecting rod 2;

[0043] The inner hole of connecting rod 2 is a threaded hole;

[0044] Anchor rod 3 is a prestressed straight rod with a prestressed structure, which is more stable and effectively strengthens the tunnel structure. Anchor rod 3 is locked in the threaded hole at the rear end of connecting rod 2.

[0045] The connecting rod 2 has the same outer diameter as the cartridge 1, so that the connecting rod 2 is flush with the outer surface of the cartridge 1. The outer protrusion of the stirring head 21 is outside the arc of the connecting rod 2 and the cartridge 1, so that the crushed and extruded cartridge 11 can be stirred by the stirring head 21.

[0046] It should be noted that:

[0047] 1. When installing conventional anchor bolts 3, the anchoring agent needs to be pushed to the bottom of the hole using the anchor bolt 3. Then, a drilling rig or other specialized tools are used to mix the anchoring agent. After the anchoring agent is fully mixed and reaches a certain strength, the washer and nut are installed. This method is difficult when installing the anchoring agent upwards above the tunnel arch, especially at the arch crown. The anchoring agent has a certain weight and is a semi-fluid with low fluidity; some of the anchoring agent will slide out from the inner hole of the anchor bolt 3 and fall off the anchor bolt 3. This method of installing the anchor bolt 3 upwards is problematic. This method also makes it difficult for the anchoring agent to penetrate to the deepest part of the anchor hole 4, failing to meet the support requirements of the anchor rod 3. In this device, the anchoring agent cartridge 11 is placed inside the cartridge 1, and the rear end of the cartridge 1 is closed, so the cartridge 11 cannot slide out backward. Moreover, the cartridge 11 can be completely placed inside the anchor hole 4. In addition, the cartridge 11 is sealed inside the cartridge 1 and cannot slide off. Furthermore, the cartridge 11 inside the cartridge 1 will not fall off regardless of whether the cartridge 1 is inverted or upright. The operation of inserting the cartridge 11 into the anchor hole 4 is convenient.

[0048] 2. The existing device involves inserting the anchor bolt and an outer sleeve 31 together into the anchor hole, such as... Figure 6 As shown, the device for reinforcing the anchor hole has an anchor rod 3 and an outer sleeve 31. This split structure is inherently less strong and less stable than the integral structure. This results in an unstable reinforcement structure inside the anchor hole 4. The anchoring agent not only needs to bond the anchor hole 4 and the outer sleeve 31, but also the outer sleeve 31 and the anchor rod 3. This creates more weak points in the structure and affects the overall reinforcement strength of the anchor hole 4. This device uses a complete and thicker anchor rod 3, which has high structural strength and provides a more solid structural support for the tunnel.

[0049] 3. In order to fit the outer sleeve 31, the existing anchor rod 3 can only be a thinner anchor rod 3. The thinner anchor rod 3 has a smaller stirring bearing capacity, a smaller bearing capacity when inserted into the anchor hole 4, and a lower structural strength. Moreover, since the anchoring agent can only be inserted into the outer sleeve 31, the amount of anchoring agent filled is limited. This device can use a thicker anchor rod 3 without affecting the amount of anchoring agent filled into the cartridge 11, so that the gap between the anchor rod 3 and the anchor hole 4 can be completely filled with the cartridge 11, and the adhesive structure is more solid.

[0050] In use, the medicine roll 11 is pre-inserted into the medicine tube 1, such as... Figure 1 As shown. Then, based on the depth of anchor hole 4, use a suitable length of extension pipe 12 to connect to the front end of cartridge 1, as shown. Figure 4 As shown, under normal circumstances, cartridge 1 can meet the depth of conventional anchor hole 4.

[0051] Insert enough medicine roll 11 to fill the medicine tube 1, and then insert the sealing plug 13 to protect the medicine roll 11 inside the medicine tube 1 and prevent it from flowing out.

[0052] The cartridge 1 and the connecting rod 2 are an integral structure. Then, the anchor rod 3 is connected to the connecting rod 2, and the entire device is placed into the anchor hole 4 until the cartridge 1 extends to the deepest part of the anchor hole 4. The anchor rod 3 is then squeezed and the cartridge 1 is crushed by the anchor rod 3 and the connecting rod 2, and the cartridge 11 flows out. The cartridge 11 overflows from the deepest part of the anchor hole 4, ensuring that there is enough cartridge 11 to cover and adhere to the deepest part of the anchor hole 4. This ensures that the anchor rod 11 can completely cover the anchor hole 4, and that the cartridge 11 can also be completely attached inside the anchor hole 4.

[0053] Anchor bolt 3 continues to be pushed until connecting rod 2 is squeezed to the deepest part of anchor hole 4. At this time, cartridge 1 has been completely crushed by connecting rod 2, forming multiple fragments. As anchor bolt 3 is pushed forward, it is also rotated and agitated by drilling rig or other driving devices. Similarly, most of the cartridge 1 fragments will fall out of the anchor hole, while a small part of the cartridge 1 fragments will adhere to the inside when the cartridge 11 solidifies. The mixture forms an anchoring structure. Anchor bolt 3 squeezes and rotates the overflowing cartridge 11 simultaneously. The cartridge is agitated and adheres more evenly between anchor bolt 3 and anchor hole 4. At the same time, the anchoring agent is agitated and will also solidify quickly, eventually forming an integral structure. Anchor bolt 3 is bonded to the inside of anchor hole 4, reinforcing the tunnel.

[0054] The front end of this device is simply the end that is inserted into the anchor hole 4, and the rear end refers to the end outside the anchor hole 4 that is connected to the driving device for stirring. That is, the lower end in the figure is the front end and the upper end is the rear end. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the figure. It is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0055] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A cartridge external fixing device for a tunnel anchor rod, characterized in that, The utility model relates to a kind of medicine cartridge, connecting rod and anchor rod, including: Medicine cartridge (1), connecting rod (2) and anchor rod (3); The medicine cartridge (1) is hollow straight pipe with open front end, and the inner cavity of the medicine cartridge (1) is also filled with a medicine roll (11); The connecting rod (2) is a circular tube with open rear end, and a plurality of stirring heads (21) are attached to the outer wall of the connecting rod (2). The stirring heads (21) are protruding from the side wall of the connecting rod (2), and the stirring heads (21) and the connecting rod (2) are integrated. The front end of the connecting rod (2) is closed. The connecting rod (2) is fixedly connected to the top of the medicine cartridge (1), and the inner cavity of the medicine cartridge (1) is isolated from the inner cavity of the connecting rod (2). The inner hole of the connecting rod (2) is a threaded hole. The anchor rod (3) is a straight rod, and the anchor rod (3) is locked in the threaded hole at the rear end of the connecting rod (2). The connecting rod (2) has the same external diameter as the medicine cartridge (1).

2. The cartridge external fixation device for a tunnel anchor according to claim 1, characterized in that: The medicine cartridge (1) is a transparent PC circular tube. The front end of the medicine cartridge (1) is provided with a continuation pipe (12) through screw thread. The continuation pipe (12) is a circular tube with open ends, and a plurality of the continuation pipes (12) are connected end to end through screw thread to form an integrated circular tube. The continuation pipe (12) has the same external diameter as the medicine cartridge (1).

3. The cartridge external fixation device for a tunnel anchor according to claim 1, characterized in that: The connecting rod (2) is a PC circular tube, and the stirring heads (21) and the connecting rod (2) are integrated.

4. The cartridge external fixation device for a tunnel anchor according to claim 1, characterized in that: The inner hole diameter of the medicine cartridge (1) is not less than the diameter of the medicine roll (11). The medicine roll (11) is a viscous resin anchoring agent.

5. The cartridge external fixation device for a tunnel anchor according to claim 2, characterized in that: The front end of the medicine cartridge (1) is provided with a sealing plug (13). The sealing plug (13) is a PV flat plate, and the sealing plug (13) covers the front opening of the medicine cartridge (1) or the continuation pipe (12).

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