Dragging type slurry mixing and grouting machine, anchor rod grouting system and using method

Abstract

The invention discloses a dragging type slurry mixing and grouting machine, an anchor rod grouting system and a using method, and relates to the technical field of tunnel and underground engineering construction equipment. Comprising a movable vehicle body, a trailer hook A is arranged at the front end of the vehicle body; the stirrer is fixed at the front end of the vehicle body and comprises a stirring barrel, a stirring motor and stirring blades; the cement bin and the water storage bin are arranged at the top of the tail end of the vehicle body side by side and are connected with the stirring barrel through a feeding pump A, a cement pipe B, a water pump and a water pipe B; and an inlet of the grouting pump is connected with the bottom of the stirring barrel through a slurry feeding pipe, and an outlet of the grouting pump is provided with a slurry outlet. The anchor rod grouting system comprises the grouting machine, an anchor rod drilling machine with a tow hook B, a tow bar connected with the tow hook and a slurry feeding pipe connected with a slurry outlet and a slurry inlet of the anchor rod drilling machine. According to the device, automatic slurry mixing and precise proportioning can be achieved, the number of operators is reduced, the pipe blocking risk is reduced, and the anchor rod grouting efficiency and quality are improved.

Description

Technical Field

[0001] This application belongs to the technical field of tunnel and underground engineering construction equipment, and specifically relates to a drag-type grouting machine, an anchor bolt grouting system, and a method of using it. Background Technology

[0002] In the construction of anchor bolt support in tunnels and underground engineering, the quality of grouting directly affects the support effect and project safety. Currently, integrated anchor-grouting machines are often used on site for drilling and grouting anchor bolt holes. This equipment integrates drilling and grouting functions into one unit, resulting in inherent defects in its built-in grouting system: First, due to the limited space of the machine, the grouting chamber capacity is small, requiring frequent interruptions for manual replenishment, leading to low efficiency; second, the processes of adding materials, proportioning, and mixing are highly dependent on manual operation, requiring at least three workers to work together, and the water-cement ratio of the grout is poorly controlled, seriously affecting the anchor bolt anchoring force; finally, the grout delivery pipeline needs to bypass complex moving parts such as robotic arms, resulting in long pipelines with many bends, a very high risk of pipe blockage, and frequent cleaning and maintenance, which seriously encroaches on effective construction time.

[0003] Therefore, there is an urgent need in this field for a specialized grouting equipment that can achieve automatic feeding, automatic grout mixing, and efficient collaboration with anchor drilling rigs, in order to solve a series of problems in the existing technology, such as a large number of workers, low mixing accuracy, and high risk of pipe blockage. Summary of the Invention

[0004] The purpose of this application is to provide a drag-type grouting machine, an anchor bolt grouting system, and a method for using it. This addresses the problems mentioned in the background art, such as the small grouting chamber capacity due to space limitations requiring frequent manual replenishment, the reliance on manual operation leading to a large number of workers, and poor grout mixing accuracy in integrated anchor bolt grouting machines.

[0005] To achieve the above objectives, this application adopts the following technical solution: Firstly, a drag-type grouting machine is provided, comprising: A mobile vehicle body, wherein a trailer hitch A is provided at the front end of the mobile vehicle body, and lifting outriggers are installed on the bottom plate of the mobile vehicle body; A mixer is fixedly installed at the front end of the mobile vehicle body. The mixer includes a mixing tank, a mixing motor disposed above the mixing tank, and mixing blades driven by the mixing motor and extending into the mixing tank. The cement silo and water storage silo are fixedly installed side by side in the top space at the rear end of the mobile vehicle body; The bottom outlet of the cement silo is connected to the inlet of the mixing tank via a feed pump A and a cement pipe B. The bottom outlet of the water storage tank is connected to the feed inlet of the mixing tank via a water pump and a water delivery pipe B; the grouting pump is fixedly installed at the bottom of the mobile vehicle body, the inlet of the grouting pump is connected to the bottom outlet of the mixing tank via a first grout delivery pipe, and the outlet of the grouting pump is provided with a grout outlet located at the rear of the mobile vehicle body. The feed pump A and the water pump are used for controlled operation to transport cement and water to the mixer for automatic mixing.

[0006] In one possible implementation, the top of the cement silo is provided with a switch A for controlling the start and stop of the feed pump A and a flow meter A for measuring the cement flow rate. The top of the water storage tank is equipped with a switch B for controlling the start and stop of the water pump and a flow meter B for measuring the water flow.

[0007] In one possible implementation, an automatic control unit is also included, which is electrically connected to the feed pump A, the water pump, the flow meter A, and the flow meter B. The automatic control unit is configured to receive the flow signals from the flow meter A and the flow meter B, and automatically adjust the operating status of the feed pump A and the water pump based on a preset cement to water delivery ratio.

[0008] In one possible implementation, the grouting pump is a screw pump, including a motor and a screw driven by the motor, the screw being horizontally mounted inside the pump casing of the grouting pump.

[0009] In one possible implementation, the water storage tank is also equipped with a water inlet valve, which is used to connect to the main water pipe inside the tunnel via a water delivery pipe.

[0010] Secondly, an anchor bolt grouting system is provided, comprising: As described in the first aspect, a drag-type grouting machine; An anchor drilling rig, wherein a trailer hook B is provided at the rear of the anchor drilling rig; The trailer bar has two ends detachably connected between the trailer hook A and the trailer hook B; The second grouting pipe is detachably connected at both ends to the grout outlet and the grout inlet of the anchor drilling rig.

[0011] Thirdly, a method for tunnel anchor grouting using the anchor grouting system as described in claim 5 is provided, characterized by comprising the following steps: Step 1: Add cement to the cement silo outside the tunnel, and connect the towed grouting machine to the anchor drilling rig using the trailer boom; Step 2: The anchor drilling rig drags the towed grouting machine to the construction area at the tunnel face, and then the two are separated; Step 3: Operate the anchor drilling machine to drill and clean the anchor holes; Step 4: Operate the lifting outriggers to lift the mobile vehicle body so that its wheels are off the ground, adjust the direction of the mobile vehicle body so that the slurry outlet faces the anchor drilling rig, and then lower the lifting outriggers; connect the water inlet valve to the main water pipe on the tunnel sidewall through the water supply pipe; Step 5: Connect the grout outlet and the grout inlet using the second grout delivery pipe; start the towable grouting machine, operate switch A and switch B, and control the cement and water delivery volume according to flow meter A and flow meter B. The mixer mixes the input materials, and the grouting pump pumps out the mixed grout. At the same time, operate the anchor drilling machine to install anchors and perform grouting. Step 6: After the grouting operation is completed, stop the cement supply and pump clean water into the grouting pipeline for cleaning; then disassemble the second grout delivery pipe and the water delivery pipe, adjust the direction of the towed grouting machine, and connect it to the anchor drilling rig through the trailer bar and tow it away from the construction area.

[0012] In one possible implementation, in step 5, the operating conditions of the feed pump A and the water pump are adjusted in real time based on the readings of the flow meter A and the flow meter B, so as to achieve precise control of the water-cement ratio of the slurry.

[0013] In one possible implementation, in step 4, the towed grouting machine, after its orientation has been adjusted, is positioned as close as possible to the working face without interfering with the operation of the anchor drilling rig.

[0014] In one possible implementation, during step 6, when cleaning the grouting pipeline, the water pump and the grouting pump are kept running until the second grout delivery pipe discharges clean water.

[0015] Compared with the prior art, this application has the following beneficial effects: This application provides a towable grouting machine, which adopts an independent mobile vehicle body, eliminating the space limitations of integrated anchoring and grouting machines. It features large cement and water storage tanks, eliminating the need for frequent manual material replenishment and reducing operational interruptions. The mixer, cement tank, water storage tank, and grouting pump are integrated into one unit, achieving integrated operation from material storage, transportation, mixing to grouting, eliminating the need for multiple operators and reducing the number of workers required. The grouting pump outlet is located at the rear of the vehicle body, shortening the pipeline length and reducing bends when connecting the grouting pipe, thus lowering the risk of pipe blockage. Simultaneously, the lifting outriggers provide stable support for the vehicle body, ensuring that the equipment does not shift during operation, improving the stability and safety of the grouting operation.

[0016] An anchor bolt grouting system is disclosed, which flexibly connects a towed grout mixing and injection machine and an anchor bolt drilling machine via a trailer boom and a grout delivery pipe, enabling the two to work together. The trailer boom is detachable, allowing the two to be separated upon arrival at the construction area, enabling the anchor bolt drilling machine and the injection machine to operate independently without interference. The anchor bolt drilling machine can focus on drilling and hole cleaning, while the injection machine can focus on mixing and injecting grout, improving work efficiency. The grout delivery pipe is made of steel wire reinforced rubber tubing, which has a certain degree of flexibility and strength, making it easy to adjust its placement position in the construction area. The quick-connect design makes the connection and disassembly of the grout delivery pipe convenient, reducing equipment assembly and disassembly time. At the same time, the system components are highly adaptable and can be flexibly adjusted according to different tunnel construction scenarios, making it widely applicable.

[0017] A method for grouting tunnel anchor bolts using an anchor bolt grouting system is disclosed. This method features a clear process and tightly integrated steps, forming a complete closed-loop operation from equipment preparation, transportation, drilling, grouting to subsequent cleaning and removal, ensuring the orderly progress of the anchor bolt grouting operation. During the operation, the grouting machine and anchor bolt drilling rig have clearly defined roles and work synchronously, reducing waiting time and improving overall construction efficiency. Precise control of the cement and water delivery flow rates ensures the grout ratio meets design requirements, improving the anchor bolt anchoring quality. After the operation, the pipelines are thoroughly cleaned to prevent grout residue from clogging them, reducing subsequent maintenance costs. Furthermore, the equipment can be easily removed without affecting subsequent tunnel construction procedures. Attached Figure Description

[0018] Figure 1 This application provides an overall structural schematic diagram of a drag-type grouting machine. Figure 2 A connection diagram of a towable grouting machine and an anchor drilling rig is provided in this application; Figure 3 A plan view of a combined operation of a towed grouting machine and an anchor drilling rig provided for this application.

[0019] The attached diagram is labeled as follows: 1. Grouting machine; 11. Lifting outrigger; 2. Grouting pump; 21. Motor; 22. Spiral rod; 23. First grouting pipe; 24. Grout outlet; 3. Cement silo; 31. Feed pump A; 32. Cement pipe A; 33. Cement pipe B; 34. Switch A; 35. Flow meter A; 36. Feed port; 4. Water storage tank; 41. Water pump; 42. Water supply pipe A; 43. Water supply pipe B; 44. Switch B; 45. Flow meter B; 46. Inlet valve; 5. Mixer; 51. Mixing motor; 52. Mixing blade; 53. Mixing tank; 6. Trailer hook A; 7. Anchor drilling rig; 71. Mechanical arm; 72. Grouting rod; 73. Grout inlet; 74. Trailer hook B; 75. Second grouting pipe; 8. Trailer bar; 9. Main water pipe; 91. Water supply pipe. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined. The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, this application discloses a towable grouting machine, an anchor bolt grouting system, and a method of use. The towable grouting machine may include a mobile vehicle body, a mixer 5, a cement silo 3, and a water storage silo 4.

[0027] The mobile vehicle is equipped with a trailer hitch A6 at its front end and lifting outriggers 11 on its floor. A mixer 5 is fixedly installed at the front end of the mobile vehicle. The mixer 5 includes a mixing tank 53, a mixing motor 51 located above the mixing tank 53, and mixing blades 52 driven by the mixing motor 51 and extending into the mixing tank 53. A cement silo 3 and a water storage tank 4 are fixedly installed side by side in the top space at the rear end of the mobile vehicle.

[0028] The bottom outlet of the cement silo 3 is connected to the inlet of the mixing tank 53 via a feed pump A31 and a cement pipe B33. The inlet of the feed pump A31 is connected to the bottom of the cement silo 3 via a cement pipe A. A stainless steel filter with a 1mm aperture is installed at the end of the cement pipe A. The bottom outlet of the water storage tank 4 is connected to the feed inlet of the mixing tank 53 via a water pump 41 and a water supply pipe B43. The inlet of the water pump 41 is connected to the bottom of the water storage tank 4 via a water supply pipe A42. A copper filter with a 2mm aperture is installed at the end of the water supply pipe A42 to prevent impurities from entering the water pump 41. The grouting pump 2 is fixedly installed at the bottom of the mobile vehicle body. The inlet of the grouting pump 2 is connected to the bottom outlet of the mixing tank 53 via a first grouting pipe 23. The outlet of the grouting pump 2 is provided with a grout outlet 24, which is located at the rear of the mobile vehicle body. The feed pump A31 and the water pump 41 are used for controlled operation to transport cement and water to the mixer 5 for automatic mixing.

[0029] Specifically, a mobile vehicle body is constructed using a steel frame structure, with four steerable wheels installed at the bottom. A steel trailer hook A6 is welded to the front of the vehicle body, and a hydraulically driven lifting outrigger 11 is installed at each of the four corners of the vehicle body floor. The maximum extension stroke of the outrigger is 30cm, and the support pads are made of rubber with anti-slip textures on the bottom.

[0030] The mixer 5 is fixedly installed at the front of the vehicle body with bolts. The mixing tank 53 of the mixer 5 is made of stainless steel. The mixing motor 51 is fixed above the mixing tank 53 by a bracket. The mixing blade 52 adopts a spiral structure, is driven by the motor 21 and extends into the mixing tank 53. The gap between the mixing blade 52 and the inner wall of the mixing tank 53 is 8mm.

[0031] At the top space at the rear of the vehicle body, cement tank 3 and water storage tank 4 are fixed side by side by angle steel brackets. Both are cylindrical steel containers.

[0032] The bottom outlet of cement silo 3 is connected to feed pump A31 through a pipe. Feed pump A31 is a screw pump with a flow rate adjustment range of 0-50L / min. The outlet of feed pump A31 is connected to the feed inlet of mixing tank 53 through cement pipe B33.

[0033] The bottom outlet of the water storage tank 4 is connected to a water pump 41 via a pipe. The water pump 41 is a centrifugal water pump with a flow rate adjustment range of 0-80L / min. The outlet of the water pump 41 is connected to the feed inlet of the mixing tank 53 via a water delivery pipe B43.

[0034] A grouting pump 2 is fixedly installed at the bottom of the vehicle body with bolts. The grouting pump 2 is a spiral pump. The inlet is connected to the bottom outlet of the mixing tank 53 through the first grouting pipe 23. The inner diameter of the first grouting pipe 23 is 50mm. A steel grout outlet 24 is welded to the outlet of the grouting pump 2. The grout outlet 24 is located at the rear of the vehicle body, and a rubber check valve is installed at the grout outlet 24.

[0035] In this embodiment, the towed grouting machine adopts an independent mobile vehicle body, which eliminates the space limitations of the integrated anchoring and grouting machine. The cement silo 3 and water storage silo 4 have large capacities, eliminating the need for frequent manual material replenishment and reducing the number of operation interruptions. The mixer 5, cement silo 3, water storage silo 4 and grouting pump 2 are integrated into one unit, realizing integrated operation from material storage, transportation, mixing to grouting, eliminating the need for multiple people to work together and reducing the number of operators. The grout outlet 24 of the grouting pump 2 is located at the rear of the vehicle body, which can shorten the pipeline length when connecting the first grouting pipe 23, reduce bends, and reduce the risk of pipe blockage. At the same time, the lifting outrigger 11 can stably support the vehicle body, ensuring that the equipment does not shift during operation and improving the stability and safety of the grouting operation.

[0036] In one possible embodiment, the top of the cement silo 3 is provided with a switch A34 for controlling the start and stop of the feed pump A31 and a flow meter A35 for measuring the cement flow rate. The top of the water storage tank 4 is equipped with a switch B44 for controlling the start and stop of the water pump 41 and a flow meter B45 for measuring the water flow.

[0037] Optionally, a switch A34 and a flow meter A35 are mounted on the top of the cement silo 3 via a bracket. Switch A34 is an electromagnetic control valve electrically connected to the feed pump A31, which can control the start and stop of the feed pump A31. Flow meter A35 is an electromagnetic flow meter with a range of 0-60L / min, connected in series with the cement pipe B33, which can monitor the cement conveying flow rate in real time and display the data on the control panel. Similarly, a switch B44 and a flow meter B45 are mounted on the top of the water storage silo 4 via a bracket. Switch B44 is an electromagnetic control valve electrically connected to the water pump 41, which controls the start and stop of the water pump 41. Flow meter B45 is an electromagnetic flow meter with a range of 0-100L / min, connected in series with the water conveying pipe B43, which can monitor the clean water conveying flow rate in real time and display it on the control panel.

[0038] In this embodiment, by installing switches and flow meters on the top of the cement silo 3 and the water storage silo 4, operators can conveniently control the start and stop of cement and water conveyance via the switches, eliminating the need for manual valve operation and reducing operational difficulty. The flow meters can provide real-time feedback on the flow rates of cement and water, allowing operators to precisely adjust the material conveying volume according to construction needs, thereby achieving precise control of the grout water-cement ratio, avoiding the impact of mix ratio deviations on anchor bolt anchoring force, improving anchor bolt grouting quality, and simultaneously enabling operators to promptly detect material conveying abnormalities, ensuring stable operation.

[0039] In one possible embodiment, the automatic control unit is electrically connected to the feed pump A31, the water pump 41, the flow meter A35, and the flow meter B45. The automatic control unit is configured to receive the flow signals from the flow meter A35 and the flow meter B45, and to regulate the operation of the feed pump A31 and the water pump 41 based on a preset cement to water delivery ratio.

[0040] An automatic control unit, which is a PLC controller, is installed on the vehicle body. The PLC controller is electrically connected to the feed pump A31, water pump 41, flow meter A35, and flow meter B45 via wires. The cement-to-water delivery ratio is preset to 1:1.5 on the PLC controller's touchscreen. Flow meters A35 and B45 transmit the real-time collected cement and clean water flow data to the PLC controller. When flow meter A35 displays a cement flow rate of 25 L / min, the PLC controller automatically calculates the required clean water flow rate as 37.5 L / min. If flow meter B45 displays a clean water flow rate of 35 L / min, the PLC controller automatically sends a signal to water pump 41 to adjust its speed, increasing the clean water flow rate to 37.5 L / min. If the cement flow rate changes, the PLC controller also automatically adjusts the operating conditions of water pump 41 to ensure that both always conform to the preset ratio.

[0041] In this embodiment, the automatic control unit enables automated control of material conveying in the grouting machine 1, eliminating the need for manual real-time monitoring and flow adjustment. This further reduces the number of steps required by operators, lowers labor intensity, and minimizes human error. By receiving flow signals and automatically adjusting the operating conditions of the feed pump and water pump 41 through the PLC controller, it can quickly respond to flow fluctuations, ensuring that the cement-to-water conveying ratio always meets the preset requirements. This achieves highly accurate grout mixing and guarantees stable grout quality. At the same time, the automated control enhances the intelligence level of the equipment, making the grouting machine 1 more adaptable to the automation development trend of modern tunnel construction. Furthermore, the PLC controller is stable and highly reliable, enabling long-term stable operation in the complex construction environment of tunnels, ensuring the continuity and stability of grouting operations.

[0042] In one possible embodiment, the grouting pump 2 is a screw pump, including a motor 21 and a screw rod 22 driven by the motor 21, the screw rod 22 being horizontally installed inside the pump casing of the grouting pump 2.

[0043] Optionally, the pump casing of the screw pump is made of cast iron, and a horizontally mounted screw rod 22 is installed inside. The screw rod 22 is made of stainless steel. One end of the screw rod 22 is connected to the output shaft of the motor 21 through a coupling. The motor 21 is a three-phase asynchronous motor. The speed of the motor 21 is adjusted by a frequency converter, thereby controlling the rotation speed of the screw rod 22. The gap between the screw rod 22 and the inner wall of the pump casing is 5mm to ensure no leakage during slurry transportation.

[0044] In this embodiment, the spiral pump has a simple structure and stable delivery, making it suitable for conveying slurry-like fluids. It can effectively avoid leakage or blockage caused by pressure fluctuations during slurry delivery. The spiral rod 22 is driven to rotate by the motor 21, and the speed of the motor 21 can be adjusted by a frequency converter, which can flexibly control the output flow of the grouting pump 2 to meet the grouting requirements of different anchor holes. For example, when grouting anchor holes with larger diameters, the speed can be increased to increase the flow rate, while when grouting anchor holes with smaller diameters, the speed can be reduced to decrease the flow rate, thus improving the adaptability of the equipment. At the same time, the stainless steel spiral rod 22 and the cast iron pump casing are durable, extending the service life of the grouting pump 2.

[0045] In one possible embodiment, the water storage tank 4 is also provided with a water inlet valve 46, which is used to connect to the main water pipe 9 in the tunnel through the water delivery pipe 91.

[0046] Specifically, a steel interface is welded to the middle of the side wall of the water storage tank 4 of the grouting machine 1. The interface is connected to the water inlet valve 46 by thread. The water inlet valve 46 is a ball valve. The other end of the water inlet valve 46 can be connected to the main water pipe 9 in the tunnel through the water delivery pipe 91. The water delivery pipe 91 is made of PVC material, and its length can be flexibly selected according to the distance between the main water pipe 9 and the grouting machine 1 at the construction site. Quick connectors are installed at both ends of the water delivery pipe 91 to facilitate quick connection and disconnection with the water inlet valve 46 and the main water pipe 9.

[0047] In this embodiment, the water storage tank 4 is equipped with an inlet valve 46, which allows for quick water replenishment via a water supply pipe 91 to the main water pipe 9 inside the tunnel when the water level in the storage tank 4 is insufficient. This eliminates the need to drag the grouting machine 1 outside the tunnel for water replenishment, reducing the number of equipment movements and saving operation time. The water supply pipe 91 is made of lightweight and portable PVC material, and the quick connectors at both ends make connection and disassembly convenient, reducing the labor intensity of the operators. At the same time, the ball valve-type inlet valve 46 is flexible in its operation and can effectively control the water replenishment flow, preventing the water storage tank 4 from overflowing and ensuring a clean working environment.

[0048] In one possible embodiment, an anchor bolt grouting system is provided, including a towable grouting machine anchor bolt drill 7 as described in the first aspect, a trailer boom 8, and a second grout delivery pipe 75.

[0049] The anchor drilling rig 7 is equipped with a trailer hook B74 at its rear.

[0050] An existing anchor drilling rig 7 is selected, and a trailer hook B74 matching the trailer hook A6 is welded to the tail of the anchor drilling rig 7. The trailer hook B74 is a steel U-shaped structure. The two ends of the trailer bar 8 are detachably connected between the trailer hook A6 and the trailer hook B74.

[0051] The two ends of the second grouting pipe 75 are detachably connected between the grout outlet 24 and the grout inlet 73 of the anchor drilling rig 7.

[0052] Make a trailer bumper 8, which is a steel round rod. Weld a hook that is compatible with trailer hook A6 and trailer hook B74 to each end of the trailer bumper 8. It can be detachably connected between trailer hook A6 and trailer hook B74 by means of a pin.

[0053] Prepare a second grout delivery pipe 75. The second grout delivery pipe 75 is made of steel wire reinforced rubber tubing. A quick connector is installed at each end of the second grout delivery pipe 75. One end can be detachably connected to the grout outlet 24 of the grouting machine 1, and the other end can be detachably connected to the grout inlet 73 of the anchor drilling machine 7. The grout inlet 73 of the anchor drilling machine 7 is located at the tail end of the mechanical arm 71 and is connected to the inside of the grouting rod 72.

[0054] In this embodiment, the anchor bolt grouting system flexibly connects the towed grouting machine and the anchor bolt drilling rig 7 via a trailer boom 8 and a second grout delivery pipe 75, enabling them to work together. The trailer boom 8 is detachable, allowing the two to be separated upon arrival at the construction area, enabling the anchor bolt drilling rig 7 and the grouting machine 1 to operate independently without interference. The anchor bolt drilling rig 7 can focus on drilling and cleaning, while the grouting machine 1 can focus on mixing and grouting, improving work efficiency. The second grout delivery pipe 75 is made of steel wire reinforced rubber tubing, which has a certain degree of flexibility and strength, making it easy to adjust its placement in the construction area. The quick-connect design makes the connection and disassembly of the second grout delivery pipe 75 convenient, reducing equipment assembly and disassembly time. At the same time, the system components are highly adaptable and can be flexibly adjusted according to different tunnel construction scenarios, making it widely applicable.

[0055] In one possible embodiment, a method for grouting tunnel anchor bolts using an anchor bolt grouting system is provided, comprising the following steps: Step 1: Outside the tunnel, add P.O42.5 ordinary Portland cement into the cement silo 3 through the feed port 36 at the top of the cement silo 3 until the cement silo 3 is 80% full. Then, hang the hooks at both ends of the trailer boom 8 on the trailer hook A6 of the grouting machine 1 and the trailer hook B74 of the anchor drilling machine 7 respectively, and fix them with pins.

[0056] Step 2: Start the anchor drilling rig 7 and slowly drag the grouting machine 1 into the tunnel until it reaches the construction area at the tunnel face. Turn off the anchor drilling rig 7, pull out the pins at both ends of the trailer boom 8, and remove the trailer boom 8 to separate the grouting machine 1 from the anchor drilling rig 7. Park them in suitable positions. Park the anchor drilling rig 7 in a position close to the tunnel face and convenient for drilling, and park the grouting machine 1 in an area that will not affect the operation of the anchor drilling rig 7.

[0057] Step 3: Operate the control panel of the anchor drilling machine 7, adjust the angle of the robotic arm 71 so that the drill rod is aligned with the designed anchor hole position, start the drilling motor 21, and drill anchor holes with a diameter of 25mm and a depth of 2m. After each anchor hole is drilled, turn on the high-pressure air gun and blow high-pressure air into the hole to clean the rock debris and dust in the hole until there are no obvious debris in the hole.

[0058] Step 4: Operate the control button of the lifting outrigger 11 of the grouting machine 1 to extend the outrigger and lift the mobile vehicle until the wheels are completely off the ground. Two workers work together to push the vehicle and adjust its direction so that the grout outlet 24 of the grouting machine 1 faces the anchor drilling rig 7. Then operate the control button to retract the outrigger and make the wheels contact the ground. Take a 5m long water pipe 91, connect one end to the water inlet valve 46 of the water storage tank 4 through a quick connector, and connect the other end to the main water pipe 9 on the tunnel sidewall.

[0059] Step 5: Take the second grouting pipe 75, connect one end to the grout outlet 24 of the grouting machine 1 via a quick connector, and connect the other end to the grout inlet 73 of the anchor drilling rig 7; start the main switch of the grouting machine 1, operate the switch A34 of the cement silo 3 and the switch B44 of the water storage silo 4, turn on the feed pump A31 and the water pump 41, observe the readings of the flow meters A35 and B45, and control the cement conveying flow rate to 30L / min and the clean water conveying flow rate to 45L / min. n, the mixing motor 51 of the mixer 5 starts, driving the mixing blade 52 to mix the cement and water. The mixing time is 2 minutes. After a uniform slurry is formed, the grouting pump 2 starts and pumps the slurry through the second grouting pipe 75 to the grouting rod 72 of the anchor drilling machine 7. At the same time, the anchor drilling machine 7 is operated to install the anchor rod into the grouting rod 72. The mechanical arm 71 is adjusted to insert the grouting rod 72 into the anchor hole. The anchor rod is pushed forward while grouting until the anchor rod is installed in place and the slurry overflows from the hole.

[0060] Step 6: After all anchor bolt installation and grouting operations are completed, turn off switch A34 and feed pump A31 of cement silo 3 to stop cement supply. Keep switch B44 and water pump 41 of water storage silo 4 open to deliver clean water into mixing tank 53. After stirring, the clean water enters grouting pump 2 to clean the second grouting pipe 75, grouting pump 2 and grout outlet 24. Continue cleaning for 5 minutes until the second grouting pipe 75 discharges clean water. Then turn off water pump 41 and grouting pump 2, disassemble the second grouting pipe 75 and water pipe 91, operate lifting outrigger 11 to lift the vehicle body, adjust the vehicle body direction to face the tunnel exit, retract the outrigger, reconnect grouting machine 1 and anchor bolt drilling machine 7 with trailer bar 8, start anchor bolt drilling machine 7, and tow grouting machine 1 out of the tunnel construction area.

[0061] In this embodiment, the method has a clear process and closely linked steps, forming a complete closed loop from equipment preparation, transportation, drilling, grouting to subsequent cleaning and removal, ensuring the orderly progress of anchor bolt grouting operations. During the operation, the grouting machine 1 and the anchor bolt drilling machine 7 have clear division of labor and work synchronously, reducing waiting time and improving overall construction efficiency. By precisely controlling the flow rate of cement and clean water, the grout ratio is ensured to meet design requirements, improving the anchor bolt anchoring quality. After the operation, the pipeline is thoroughly cleaned to avoid grout residue clogging the pipeline, reducing subsequent maintenance costs. At the same time, the equipment can be easily removed without affecting subsequent tunnel construction procedures.

[0062] In one possible embodiment, in step 5, the operating conditions of the feed pump A31 and the water pump 41 are adjusted in real time based on the readings of the flow meter A35 and the flow meter B45, so as to achieve precise control of the water-cement ratio of the slurry.

[0063] The water-cement ratio of the grout is preset to 0.5 on the control panel of grouting machine 1. Flow meters A35 and B45 transmit the real-time monitored cement and water flow signals to the control panel. When flow meter A35 displays a cement flow rate of 28 L / min and flow meter B45 displays a water flow rate of 45 L / min, the control panel issues a prompt. The operator adjusts the frequency converter of the feed pump A31 to increase the cement flow rate to 30 L / min, so that the water-cement ratio returns to 0.5. If the water flow rate fluctuates, such as dropping to 40 L / min, the water pump 41 is adjusted to increase the water flow rate to 45 L / min, ensuring that the water-cement ratio of the grout is always kept within the preset range.

[0064] In this embodiment, by adjusting the operating conditions of the feed pump and water pump 41 based on the real-time readings of the flow meter, dynamic and precise control of the water-cement ratio of the grout is achieved. This avoids deviations in the water-cement ratio from the design value due to fluctuations in the material conveying flow, ensuring that the strength and fluidity of the grout meet the requirements for anchor bolt grouting. This, in turn, guarantees the anchoring effect between the anchor bolt and the surrounding rock, and reduces the safety hazards of support caused by grout quality issues. At the same time, the real-time adjustment method does not require interruption of the grouting operation, ensuring the continuity of the grouting process, improving work efficiency, and reducing time waste caused by ratio adjustments.

[0065] In one possible embodiment, in step 4, the towed grouting machine, after its direction has been adjusted, is positioned as close as possible to the working face without interfering with the operation of the anchor drilling rig 7.

[0066] In the tunnel face construction area, first measure the working radius of the anchor drilling rig 7 to determine the activity area of ​​the robotic arm 71 during drilling operations. Then, place the grouting machine 1 outside this activity area, at a distance of 3m from the tunnel face. At this time, the grout outlet 24 of the grouting machine 1 faces the anchor drilling rig 7. The second grouting pipe 75 is of appropriate length after connection, without obvious bends. At the same time, the ground where the grouting machine 1 is placed is flat, without water accumulation or debris, and the lifting outrigger 11 supports the vehicle body for stability.

[0067] In this embodiment, the grouting machine 1, after its direction is adjusted, is positioned close to the working face without interfering with the operation of the anchor drilling rig 7. This shortens the length of the second grout delivery pipe 75, reduces the number of pipe bends, lowers the resistance and risk of pipe blockage during grout delivery, and ensures stable grouting pressure. On the other hand, being close to the working face reduces the grout delivery time in the pipe, preventing the grout from remaining in the pipe for an extended period and causing initial setting, thus ensuring grout performance. At the same time, it does not interfere with the operation of the anchor drilling rig 7, allowing both to operate synchronously and efficiently, avoiding operational conflicts caused by improper equipment placement, and improving the space utilization of the construction site.

[0068] In one possible embodiment, during step 6, when cleaning the grouting pipeline, the water pump 41 and the grouting pump 2 are kept running until the second grouting pipe 75 discharges clean water.

[0069] After the grouting operation is completed, turn off switch A34 and feed pump A31 of cement silo 3, and keep water pump 41 and grouting pump 2 running. Water pump 41 delivers clean water into mixing tank 53. After being stirred by mixing blade 52 in mixing tank 53, the clean water forms cleaning water. The cleaning water enters grouting pump 2 through second grouting pipe 75, and then flows back to second grouting pipe 75 through grout outlet 24 to thoroughly clean mixing tank 53, second grouting pipe 75, grouting pump 2 and grout outlet 24. During the cleaning process, check the water quality at the outlet of second grouting pipe 75 every 1 minute until the water discharged from the outlet is clear and there is no grout residue. At this time, turn off water pump 41 and grouting pump 2 to complete the cleaning.

[0070] In this embodiment, the water pump 41 and the grouting pump 2 are kept running during the cleaning of the grouting pipeline, so that the cleaning water circulates throughout the entire grouting system pipeline. This allows for a thorough cleaning of all components, including the mixing tank 53, the second grout delivery pipe 75, the grouting pump 2, and the grout outlet 24. This prevents grout residue from remaining on the inner wall of the pipeline or in the gaps between equipment components, thus preventing the residual grout from solidifying and clogging the pipeline or damaging equipment components, and extending the service life of the equipment. The discharge of clean water from the second grout delivery pipe 75 is used as the criterion for judging the completion of cleaning, ensuring thorough cleaning and preventing residual grout from affecting the ratio and performance of the new grout during subsequent use, thus ensuring the quality of the next grouting operation. At the same time, the cleaning process does not require disassembling the pipeline, making the operation convenient and saving cleaning time.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A drag-type grouting machine, characterized in that, include: The mobile vehicle body is provided with a trailer hook A (6) at the front end and a lifting outrigger (11) is installed on the bottom plate of the mobile vehicle body. A mixer (5) is fixedly installed at the front end of the mobile vehicle body. The mixer (5) includes a mixing tank (53), a mixing motor (51) disposed above the mixing tank (53), and a mixing blade (52) driven by the mixing motor (51) and extending into the mixing tank (53). Cement silo (3) and water storage silo (4) are fixedly installed side by side in the top space at the rear end of the mobile vehicle body; The bottom outlet of the cement silo (3) is connected to the inlet of the mixing tank (53) via a feeding pump A (31) and a cement pipe B (33); The bottom outlet of the water storage tank (4) is connected to the feed inlet of the mixing tank (53) via a water pump (41) and a water pipe B (43); The grouting pump (2) is fixedly installed at the bottom of the cabin of the mobile vehicle body. The inlet of the grouting pump (2) is connected to the bottom outlet of the mixing tank (53) through the first grouting pipe (23). The outlet of the grouting pump (2) is provided with a grout outlet (24), which is located at the rear of the mobile vehicle body. The feed pump A (31) and the water pump (41) are used for controlled operation to transport cement and water to the mixer (5) for automatic mixing.

2. The towable grouting machine according to claim 1, characterized in that, The top of the cement silo (3) is equipped with a switch A (34) for controlling the start and stop of the feed pump A (31) and a flow meter A (35) for measuring the cement flow rate. The top of the water storage tank (4) is equipped with a switch B (44) for controlling the start and stop of the water pump (41) and a flow meter B (45) for measuring the water flow.

3. The towed grouting machine according to claim 2, characterized in that, It also includes an automatic control unit, which is electrically connected to the feed pump A (31), the water pump (41), the flow meter A (35) and the flow meter B (45). The automatic control unit is configured to receive the flow signals of the flow meter A (35) and the flow meter B (45) and automatically adjust the operating status of the feed pump A (31) and the water pump (41) based on a preset cement to water delivery ratio.

4. The towed grouting machine according to claim 1, characterized in that, The grouting pump (2) is a screw pump, including a motor (21) and a screw rod (22) driven by the motor (21). The screw rod (22) is horizontally installed inside the pump casing of the grouting pump (2).

5. The towed grouting machine according to claim 1, characterized in that, The water storage tank (4) is also equipped with a water inlet valve (46), which is used to connect to the main water pipe (9) in the tunnel through the water delivery pipe (91).

6. An anchor bolt grouting system, characterized in that, include: The towed grouting machine as described in any one of claims 1 to 5; An anchor drilling rig (7), the tail of which is provided with a trailer hook B (74); Trailer bar (8), the two ends of which are detachably connected between the trailer hook A (6) and the trailer hook B (74); The second grouting pipe (75) is detachably connected at both ends to the grout outlet (24) and the grout inlet (73) of the anchor drilling rig (7).

7. A method for tunnel anchor grouting using the anchor grouting system as described in claim 6, characterized in that, Includes the following steps: Step 1: Add cement to the cement bin (3) outside the hole and connect the towed grouting machine to the anchor drilling machine (7) using the trailer bar (8); Step 2: The anchor drilling rig (7) drags the towed grouting machine to the construction area at the tunnel face, and then the two are separated; Step 3: Operate the anchor drilling machine (7) to drill and clean the anchor holes; Step 4: Operate the lifting outrigger (11) to lift the mobile vehicle body so that its wheels are off the ground, adjust the direction of the mobile vehicle body so that the slurry outlet (24) faces the anchor drilling machine (7), and then lower the lifting outrigger (11); connect the water inlet valve (46) to the main water pipe (9) on the tunnel sidewall through the water supply pipe (91); Step 5: Connect the grout outlet (24) and the grout inlet (73) using the second grout delivery pipe (75); start the drag-type grouting machine, operate the switch A (34) and the switch B (44), and control the cement and water delivery according to the flow meter A (35) and the flow meter B (45). The mixer (5) mixes the input materials, and the grouting pump (2) pumps out the mixed grout. At the same time, operate the anchor drilling machine (7) to install anchors and grout. Step 6: After the grouting operation is completed, stop the cement supply and pump clean water into the grouting pipeline for cleaning; then disassemble the second grouting pipe (75) and the water supply pipe (91), adjust the direction of the towed grouting machine, and connect it to the anchor drilling machine (7) through the trailer bar (8) and tow it away from the construction area.

8. The method according to claim 7, characterized in that, In step 5, the operating conditions of the feed pump A (31) and the water pump (41) are adjusted in real time according to the readings of the flow meter A (35) and the flow meter B (45) to achieve precise control of the water-cement ratio of the slurry.

9. The method according to claim 7, characterized in that, In step 4, the towable grouting machine, after its direction is adjusted, is positioned as close as possible to the working face without interfering with the operation of the anchor drilling rig (7).

10. The method according to claim 7, characterized in that, In step 6, when cleaning the grouting pipeline, the water pump (41) and the grouting pump (2) are kept running until the second grouting pipe (75) discharges clean water.

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