Roadway anchor cable supporting device and supporting method

Abstract

The application discloses a roadway anchor cable supporting device and a supporting method, which comprises a drilling mechanism and an anchor cable conveying mechanism arranged on a turning plate. An arc-shaped guide rail is arranged on the turning plate, the height of the left side of the arc-shaped guide rail is smaller than the height of the right side of the arc-shaped guide rail, the drilling mechanism comprises a first support and a drilling machine, the anchor cable conveying mechanism comprises a second support and a conveyor, and the application further comprises a trapezoidal lock for fixing one end of the outer side of an anchor cable rod. The trolley is driven to the position where the anchor cable needs to be installed, the drilling machine firstly drives the drill rod to rotate and move forward to drill, the conveyor conveys the grouting pipe and the anchor cable rod into the drill hole, the concrete is continuously injected into the drill hole when the grouting pipe is pulled out, the installation of the anchor cable rod on one side is completed, then the drilling machine is moved to the other side and the position is lifted, the above work is repeated, and the end of the anchor cable rod is locked through the trapezoidal lock. The cross anchor locking is realized, the tray stability is good, the inverted trapezoidal anchor cable supporting system can increase the roof supporting range and improve the integrity of the roof surrounding rock.

Description

Technical Field

[0001] This invention relates to the field of anchor cable support technology, specifically to a roadway anchor cable support device and support method. Background Technology

[0002] The essence of prestressed anchor cable reinforcement of rock or soil layers is to apply compressive stress to the rock or upper layer being reinforced in advance through anchor cables, thereby limiting the development of harmful deformation and maintaining the stability of the surrounding rock.

[0003] However, existing anchor cable support has poor stability, and the anchor cable installation process is complicated and inefficient. Summary of the Invention

[0004] The purpose of this invention is to solve the above problems and provide a roadway anchor cable support device and support method, which can facilitate the installation of anchor cable support and improve the stability of anchor cable support.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A tunnel anchor cable support device includes a trolley, a flap plate mounted on the trolley and rotatably connected to the trolley, a drilling mechanism mounted on the flap plate and moving on the flap plate, and an anchor cable conveying mechanism. The flap plate is provided with an arc-shaped guide rail, and the height of the left side of the arc-shaped guide rail is less than the height of the right side of the arc-shaped guide rail.

[0007] The drilling mechanism includes a first bracket supported on an arc-shaped guide rail and moving on the arc-shaped guide rail, and a drilling machine that drives the drill rod to rotate and move forward is provided at the front end of the first bracket;

[0008] The anchor cable conveying mechanism includes a second bracket supported on an arc-shaped guide rail and moving on the arc-shaped guide rail. The front end of the second bracket is provided with a conveyor that drives the grouting pipe forward. The front end of the grouting pipe is connected to the mounting bracket at the end of the anchor cable rod.

[0009] It also includes a trapezoidal lock for securing one end of the outer side of the anchor rod, wherein the trapezoidal lock has second through holes at both ends for passing through the anchor rod.

[0010] Furthermore, there are two arc-shaped guide rails, and the midpoints of the two arc-shaped guide rails overlap.

[0011] Furthermore, the center point of the arc-shaped guide rail is located on the outer side of the flip plate.

[0012] Furthermore, both the first bracket and the second bracket are equipped with drive wheel sets that cooperate with the arc-shaped guide rail at their front and rear ends.

[0013] Furthermore, the front end of the grouting pipe is provided with a buckle, and the mounting bracket at the end of the anchor rod is provided with a slot, and the buckle cooperates with the slot.

[0014] Furthermore, the mounting bracket at the end of the anchor rod is provided with a first through hole.

[0015] Furthermore, the drilling rig is provided with a guide groove for guiding the anchor rod.

[0016] Furthermore, a method for roadway anchor cable support includes the following steps:

[0017] A trolley is driven to the location where anchor cables need to be installed, and steel plates are laid at the bottom of the drilling rig;

[0018] Drilling rig B performs drilling operations. Before grouting, air pressure is used to clean the hole. The drilling depth exceeds the design length by mm to ensure that the anchor cable is pushed into place. Drilling is carried out by rotary drilling. Mud circulation is used to protect the hole during drilling. After drilling is completed, mud circulation is used to clean the hole repeatedly.

[0019] c. Install anchor bolts and grouting pipes;

[0020] d. Use air pressure to clean the hole through the grouting pipe, displacing the mud in the hole until clear water flows out of the hole.

[0021] After cleaning the hole, connect the grouting pipe and grouting pump, pull out the grouting pipe and grout simultaneously until cement slurry flows out of the hole.

[0022] f. Move the drilling mechanism and anchor cable conveying mechanism along the arc-shaped guide rail to the other side of the arc-shaped guide rail, and repeat steps a to e.

[0023] g. Install the trapezoidal lock and secure it with clips.

[0024] The beneficial effects of this invention are:

[0025] 1. This invention includes a drilling mechanism and an anchor cable conveying mechanism mounted on a flap plate. The flap plate is equipped with an arc-shaped guide rail, the height of the left side of the arc-shaped guide rail being less than the height of the right side. The drilling mechanism includes a first support and a drilling rig, and the anchor cable conveying mechanism includes a second support and a conveyor. It also includes a trapezoidal lock for fixing one end of the anchor cable rod. The trolley is driven to the position where the anchor cable needs to be installed. The drilling rig first drives the drill rod to rotate and move forward to drill a hole. The conveyor transports the grouting pipe and anchor cable rod into the hole, and the hole is cleaned by air pressure. The grouting pipe separates from the anchor cable rod. As the grouting pipe is withdrawn, concrete is continuously injected into the hole to complete the installation of the anchor cable rod on one side. Then, the drilling rig moves to the other side and rises, repeating the above work, and locking the end of the anchor cable rod with the trapezoidal lock. This achieves cross-anchoring locking, good tray stability, and the inverted trapezoidal anchor cable support system can increase the support range of the roof, improve the integrity of the surrounding rock, and allow for the design of inverted trapezoidal trays of different sizes according to site conditions.

[0026] 2. This invention includes a flap that is mounted on and rotatably connected to the trolley; by flipping the flap, the angles of different anchor rods can be adjusted, and it has a wide range of applications.

[0027] 3. This invention features a buckle at the front end of the grouting pipe and a slot on the mounting bracket at the end of the anchor rod, with the buckle engaging with the slot. When the anchor rod is being fed into the borehole, the buckle engages with the slot. Once the anchor rod is in place, rotating the grouting pipe separates the grouting pipe from the anchor rod. As the grouting pipe is withdrawn, cement grout is continuously injected into the borehole, achieving grouting. The operation is simple and convenient.

[0028] 4. The present invention provides a guide groove on the drilling rig for guiding the anchor rod, which serves to guide the anchor rod and prevent it from bending. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0033] Figure 4 for Figure 3 A magnified view of a portion of the image is shown in section A.

[0034] Figure 5 This is a schematic diagram of the present invention after anchoring;

[0035] Figure 6 This is a schematic diagram of the trapezoidal lock structure of the present invention.

[0036] In the diagram: 1. Trolley; 2. Flip plate; 3. Arc-shaped guide rail; 4. First support; 5. Drilling rig; 6. Second support; 7. Conveyor; 8. Grouting pipe; 9. Anchor rod; 10. Mounting frame; 11. Drill rod; 12. Buckle; 13. Slot; 14. First through hole; 15. Guide groove; 16. Trapezoidal lock; 17. Second through hole. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0038] For ease of description, the coordinate system is defined as follows: Figure 1 As shown.

[0039] like Figures 1 to 6 As shown, a tunnel anchor cable support device includes a trolley 1, a flap 2 mounted on and rotatably connected to the trolley 1, a drilling mechanism and an anchor cable conveying mechanism mounted on and moving on the flap 2. The rear end of the flap 2 is rotatably connected to the trolley 1. The trolley is equipped with a hydraulic cylinder that drives the flap to rotate. The flap 2 is equipped with an arc-shaped guide rail 3, the height of the left side of the arc-shaped guide rail 3 being less than the height of the right side. By flipping the flap, different angles can be adjusted, making it widely applicable.

[0040] The drilling mechanism includes a first support 4 that is supported on and moves on the arc-shaped guide rail 3. The front end of the first support 4 is provided with a drilling machine 5 that drives the drill rod 11 to rotate and move forward. The drill rod passes through the drilling machine, and the front end of the drill rod is provided with a drill bit. The drilling machine 5 is existing technology and will not be described in detail here.

[0041] The anchor cable conveying mechanism includes a second support 6 supported on the arc-shaped guide rail 3 and moving on the arc-shaped guide rail 3. The front end of the second support 6 is provided with a conveyor 7 that drives the grouting pipe 8 to move forward. The grouting pipe passes through the conveyor 7. The conveyor 7 is existing technology and will not be described in detail here. The front end of the grouting pipe 8 is connected to the mounting bracket 10 at the end of the anchor cable rod 9.

[0042] It also includes a trapezoidal lock 16 for fixing one end of the outer side of the anchor rod 9, wherein the trapezoidal lock 16 has second through holes 17 at both ends for passing through the anchor rod 9.

[0043] The trolley 1 is driven to the position where the anchor cables need to be installed. The drilling rig 5 first drives the drill rod 11 to rotate and move forward to drill the hole. The conveyor 7 transports the grouting pipe 8 and the anchor cable rod 9 into the hole. The hole is cleaned by air pressure, and the grouting pipe 8 separates from the anchor cable rod 9. As the grouting pipe 8 is pulled out, concrete is continuously injected into the hole to complete the installation of the anchor cable rod 9 on one side. Then the drilling rig 5 moves to the other side and rises, repeating the above work. The end of the anchor cable rod 9 is locked by the trapezoidal lock 16. Cross-anchoring lock is achieved, the tray has good stability, and the inverted trapezoidal anchor cable support system can increase the support range of the roof and improve the integrity of the surrounding rock. Different sizes of inverted trapezoidal trays can be designed according to the site conditions.

[0044] Two arc-shaped guide rails 3 are provided, and the midpoints of the two arc-shaped guide rails 3 overlap.

[0045] The center point of the arc-shaped guide rail 3 is located outside the flap 2, ensuring that the two intersecting anchor rods 9 form an intersection in the inner wall of the tunnel and are firmly anchored.

[0046] Both the first bracket 4 and the second bracket 6 are equipped with drive wheel sets at their front and rear ends, which cooperate with the arc-shaped guide rail 3. The drive wheel sets drive the first bracket 4 and the second bracket 6 to move along the arc-shaped guide rail 3. The drilling mechanism and the anchor cable conveying mechanism are located at different heights on both sides of the arc-shaped guide rail 3, so as to realize the installation of the two intersecting anchor locks and the anchoring is reliable.

[0047] The grouting pipe 8 has a buckle 12 at its front end, and the mounting bracket 10 at the end of the anchor rod 9 has a slot 13. The buckle 12 and the slot 13 cooperate with each other. When the anchor rod 9 is delivered into the borehole, the buckle 12 and the slot 13 cooperate. After the anchor rod 9 is delivered into place, rotating the grouting pipe 8 can separate the grouting pipe 8 and the anchor rod 9. When the grouting pipe 8 is pulled out, cement grout is continuously injected into the borehole to achieve grouting. The operation is simple and convenient.

[0048] The mounting bracket 10 at the end of the anchor rod 9 is provided with a first through hole 14, so that when clean water is injected into the borehole, the mounting bracket 10 will not block the grouting pipe 8.

[0049] The drilling rig 5 is provided with a guide groove 15 for guiding the anchor rod 9, which serves to guide the anchor rod 9 and prevent it from bending.

[0050] A method for roadway anchor cable support includes the following steps:

[0051] A trolley 1 is driven to the position where the anchor cable needs to be installed, and a steel plate is laid at the bottom of the drilling rig to ensure its flatness. The angle of the drill rod is controlled within ±2 degrees.

[0052] Drilling operation is carried out by drill rig 5. The anchor cable drilling equipment adopts ZSL-100 professional anchor bolt machine with a hole diameter of 180mm. Before grouting, air pressure is used to clean the hole. The drilling depth exceeds the design length by 0.5mm to ensure that the anchor cable is pushed in place. Drilling adopts rotary drilling method. Mud circulation is used to protect the hole during drilling. After drilling is completed, mud circulation is used repeatedly to clean the hole to remove mud and other residues in the hole. A three-wing drill bit equipped with a high-pressure mud pump and water circulation full-length casing drilling process can be used.

[0053] c. Install the anchor rod 9 and the grouting pipe 8. When installing the anchor, prevent twisting and bending. The grouting pipe is placed into the hole together with the anchor rod 9, and the end of the pipe is 50-100mm from the bottom of the hole.

[0054] After anchoring is completed, pneumatic cleaning is used through grouting pipe 8 to remove the mud from the hole until clear water flows out of the hole.

[0055] After the hole cleaning is completed, connect the grouting pipe 8 and the grouting pump. At the same time, prepare the cement grout according to the design requirements, pull out the grouting pipe 8 and grout at the same time. The entire grouting process must be coordinated. Grouting is carried out while pulling out the grouting pipe 8. During the pulling out process, it must be ensured that the grouting pipe 8 is always in the cement grout until the cement grout flows out of the hole. Only then can the grouting be stopped.

[0056] f. Move the drilling mechanism and anchor cable conveying mechanism along the arc-shaped guide rail 3 to the other side of the arc-shaped guide rail 3, and repeat steps a to e.

[0057] Install the trapezoidal lock 16 and secure it with clips.

[0058] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do 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, they should not be construed as limitations on the present invention.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A tunnel anchor cable support device, characterized in that, It includes a trolley (1), a flap (2) mounted on the trolley (1) and rotatably connected to the trolley (1), a drilling mechanism and an anchor cable conveying mechanism mounted on the flap (2) and moving on the flap (2). The flap (2) is provided with an arc-shaped guide rail (3). The height of the left side of the arc-shaped guide rail (3) is less than the height of the right side of the arc-shaped guide rail (3). The height of the left side of the arc-shaped guide rail is less than the height of the right side of the arc-shaped guide rail. By flipping the flap, the angle of different anchor cables can be adjusted. The center point of the arc-shaped guide rail is located on the outside of the flap, ensuring that the two intersecting anchor rods cross in the inner wall of the tunnel and are firmly anchored. The drilling mechanism includes a first support (4) supported on an arc-shaped guide rail (3) and moving on the arc-shaped guide rail (3), and a drilling machine (5) for driving the drill rod (11) to rotate and move forward is provided at the front end of the first support (4); The anchor cable conveying mechanism includes a second support (6) supported on an arc-shaped guide rail (3) and moving on the arc-shaped guide rail (3). The front end of the second support (6) is provided with a conveyor (7) that drives the grouting pipe (8) to move forward. The front end of the grouting pipe (8) is connected to the mounting bracket (10) at the end of the anchor cable rod (9). The drilling mechanism and the anchor cable conveying mechanism are located at different heights on both sides of the arc-shaped guide rail, which enables the installation of two intersecting anchor locks, ensuring a secure anchoring. Both the first bracket (4) and the second bracket (6) are provided with drive wheel sets that cooperate with the arc-shaped guide rail (3) at their front and rear ends; The front end of the grouting pipe (8) is provided with a buckle (12), and the mounting bracket (10) at the end of the anchor rod (9) is provided with a slot (13), and the buckle (12) cooperates with the slot (13); It also includes a trapezoidal lock (16) for fixing one end of the outer side of the anchor rod (9), the trapezoidal lock (16) having second through holes (17) at both ends for passing through the anchor rod (9).

2. The tunnel anchor cable support device as described in claim 1, characterized in that, The arc-shaped guide rail (3) is provided in two parts, and the midpoints of the two arc-shaped guide rails (3) overlap.

3. The tunnel anchor cable support device as described in claim 2, characterized in that, The center point of the arc-shaped guide rail (3) is located outside the flap (2).

4. The roadway anchor cable support device as described in claim 1, characterized in that, The mounting bracket (10) at the end of the anchor rod (9) is provided with a first through hole (14).

5. The tunnel anchor cable support device as described in claim 1, characterized in that, The drilling rig (5) is provided with a guide groove (15) for guiding the anchor rod (9).

6. A method for roadway anchor cable support, utilizing the support equipment described in any one of claims 1 to 5, characterized in that, Includes the following steps: A trolley (1) is driven to the position where anchor cables need to be installed, and a steel plate is laid at the bottom of the drilling rig; b. Drilling rig (5) performs drilling operations. Before grouting, air pressure is used to clean the hole. The drilling depth exceeds the design length by 0.5mm to ensure that the anchor cable is pushed into place. Drilling is done by rotary drilling. Mud circulation is used to protect the hole during drilling. After drilling is completed, mud circulation is used to clean the hole repeatedly. c. Install the anchor rod (9) and grouting pipe (8); d. Use air pressure to clean the hole through the grouting pipe (8) to displace the mud in the hole until clear water flows out of the hole. After cleaning the hole, connect the grouting pipe (8) and the grouting pump, pull out the grouting pipe (8) and grout simultaneously until cement slurry flows out of the hole. f. Move the drilling mechanism and the anchor cable conveying mechanism along the arc-shaped guide rail (3) to the other side of the arc-shaped guide rail (3), and repeat steps a to e; g. Install the trapezoidal lock (16) and secure it with clips.

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