Shield river-crossing tunnel ultra-shallow covering soil replacement concrete construction device and using method thereof

Abstract

The invention relates to the technical field of concrete replacement and filling construction, in particular to a shield river-crossing tunnel ultra-shallow covering soil concrete replacement and filling construction device and a using method thereof. The shield river-crossing tunnel ultra-shallow covering soil concrete replacement and filling construction device comprises a machine body and a driving mechanism arranged on the machine body; the suction assembly comprises a suction cylinder fixedly installed in the machine body, a piston movably installed in the suction cylinder and a driven plate at the bottom of the piston, an eccentric wheel is arranged below the driven plate, a suction pipe is fixedly installed on one side of the suction cylinder, and a collecting box is arranged on the machine body. A driven plate is driven to drive a rack to move up and down in a reciprocating manner, so that a gear is driven to rotate, an excavator bucket is turned over up and down, when the excavator bucket is turned over to the lower part, the sludge can be collected, and when the excavator bucket is driven to be turned over upwards, the excavator bucket is in butt joint with a guide bin, and the sludge is guided into a collecting box; the collection efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of concrete replacement construction technology, specifically to a construction device and its application method for ultra-shallow overburden replacement concrete in shield tunnels crossing rivers. Background Technology

[0002] When the overburden thickness during shield tunneling is less than one-third of the shield diameter (e.g., only 2.6 meters), it can easily cause the tunnel segments to float, making attitude control difficult, or even puncture the riverbed or ground, creating construction safety hazards. By replacing the riverbed with concrete, the soil cross-section can be reinforced, enhancing overall stability, preventing the risk of puncture caused by uneven pressure during shield tunneling, and providing additional load-bearing support for the tunnel. At the same time, combined with the addition of reinforced concrete lining inside the tunnel, the anti-buoyancy requirements of the underwater environment can be effectively met, offsetting the buoyancy caused by groundwater pressure.

[0003] The first step in concrete replacement is to use a cofferdam for diversion, followed by dredging and removal of the soft soil layer. Traditional dredging methods include removing silt using a dredging bucket. However, water may still accumulate after diversion, causing the silt to become diluted. When the bucket is used to remove silt, the silt will flow out with the water during the bucket's closing process, resulting in a reduction in the amount of silt removed and thus reducing the efficiency of concrete replacement. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a construction device and method for ultra-shallow overburden replacement concrete in shield tunnels crossing rivers, which solves the problem mentioned in the background art where silt flows out with the water during the bucket closing process, resulting in a reduction in the amount of silt removed and thus reducing the efficiency of the replacement concrete operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a shield tunneling device for ultra-shallow overburden replacement concrete construction, comprising a body and a drive mechanism mounted on the body. The drive mechanism includes a dual-axis servo motor fixedly mounted inside the body. A first wheel is fixedly mounted on the output shaft of the dual-axis servo motor. A drive belt is driven to the outer surface of the first wheel. A second wheel is driven to the other side of the drive belt. A shaft is fixedly mounted in the middle of the second wheel. Drive wheels are fixedly mounted at both ends of the shaft. It also includes a suction assembly, comprising a suction cylinder fixedly installed inside the machine body and a piston movably installed inside the suction cylinder. A driven plate is fixedly installed at the bottom of the piston, and an eccentric wheel is provided below the driven plate. A suction tube is fixedly installed on one side of the suction cylinder, and a collection box is provided on the machine body. When the drive mechanism is in operation, it can drive the suction assembly to suck up sludge for collection.

[0006] Optionally, a first elastic column is fixedly connected to the top of the inner cavity of the suction cylinder, a first baffle is fixedly connected to the bottom of the first elastic column, a second elastic column is fixedly connected to the bottom of the first baffle, and the other end of the second elastic column is fixedly connected to the piston.

[0007] Optionally, it also includes a dredging assembly, including a rack fixedly connected to the driven plate and a gear meshing with the rack. A first connecting rod is fixedly installed on the gear, and a bucket is fixedly installed at the other end of the first connecting rod. A second servo motor is fixedly installed on the bucket, and a second baffle is fixedly installed on the output shaft of the second servo motor. Guide compartments are fixedly installed on both sides of the collection box.

[0008] Optionally, a bidirectional electric push rod is fixedly installed on the top of the collection box, a second connecting rod is fixedly installed on the output shaft of the bidirectional electric push rod, a third baffle is fixedly installed on the bottom of the second connecting rod, and a through hole is opened at the bottom of the collection box.

[0009] Optionally, a third connecting rod is fixedly installed on one side of the third baffle, and a push plate is fixedly installed on the other end of the third connecting rod.

[0010] Optionally, it also includes a floating boat assembly, including a third servo motor fixedly installed on both sides of the body, a rotating rod fixedly installed on the output shaft of the third servo motor, a fourth connecting rod fixedly installed on the rotating rod, and a float plate fixedly installed at the other end of the fourth connecting rod.

[0011] Optionally, a locking block is fixedly installed on the fourth connecting rod, and a locking groove adapted to the locking block is opened on the collection box.

[0012] Optionally, the float plate is provided with a clearance groove adapted to the drive wheel, and the two ends of the float plate are curved.

[0013] The method for using a shield tunneling machine for ultra-shallow overburden replacement concrete construction includes the following steps: S1: By starting the dual-axis servo motor, the drive wheel can be driven and the piston can be driven at the same time. In conjunction with the suction tube, the sludge is sucked up and concentrated in the collection box. When the collection box is collected, it is directly taken out by the crane. S2: When the collection box is full and lifted out, the second connecting rod is moved by activating the bidirectional electric push rod, so that the third baffle blocks the through hole. When the collection box is lifted to the mud transportation point, the third baffle is removed to discharge the sludge. S3: After the silt is removed, concrete needs to be poured. After the concrete is poured, the third servo motor needs to be started to unfold the floating plate, change the equipment from the silt removal state to the floating vibration state, and bind the vibrator to the driven plate for reciprocating vibration.

[0014] This invention provides a construction device and method for replacing concrete with ultra-shallow overburden in shield tunnels crossing rivers, which has the following beneficial effects: 1. The ultra-shallow overburden replacement concrete construction device for shield tunnels crossing rivers and its usage method: the rotation of the shaft drives the eccentric wheel, which in turn drives the piston rod of the driven plate. Under the reciprocating motion of the piston, a negative pressure is generated, which draws the silt into the suction cylinder through the suction pipe. Under the compression of the piston, the silt enters the collection box. The device pumps silt while moving, improving collection efficiency and reducing energy consumption.

[0015] 2. The ultra-shallow overburden replacement concrete construction device for shield tunnels crossing rivers and its usage method, by driving the driven plate to drive the rack to move up and down reciprocally, thereby driving the gear to rotate, causing the bucket to flip up and down. When the bucket flips to the bottom, it can collect silt. When the bucket is driven to flip up, it will dock with the guide chamber and guide the silt into the collection box, further improving the collection efficiency.

[0016] 3. The ultra-shallow overburden replacement concrete construction device and its usage method for shield tunnels crossing rivers: the floating boat vibrator component can change the device from dredging state to floating boat vibration state. During the vibration operation after concrete pouring, the vibrator rod can move with the device and vibrate up and down repeatedly, increasing the vibration range and speeding up the operation efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the dredging structure of the present invention; Figure 2 This is a schematic diagram of the structure of the floating boat in the vibrating state of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the floating boat in the vibrating state of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the internal structure of the machine body of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the internal structure of the machine body of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the internal structure of the body and collection box of the present invention; Figure 7 This is a schematic diagram of the structure of the driving component and the suction component of the present invention; Figure 8 This is a schematic diagram of the internal structure of the collection box of the present invention; Figure 9 For the present invention Figure 1 A magnified schematic diagram of the local structure at point A; Figure 10 For the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0018] In the diagram: 1. Machine body; 11. Dual-axis servo motor; 12. First rotating wheel; 13. Transmission belt; 14. Second rotating wheel; 15. Shaft; 16. Drive wheel; 21. Eccentric wheel; 22. Suction cylinder; 23. Piston; 24. Return spring; 25. Driven plate; 26. Suction tube; 27. Collection box; 3. First elastic column; 31. First baffle; 32. Second elastic column; 4. Rack; 41. Gear; 42. First connecting rod; 43. Bucket; 44. Second servo motor; 45. Second baffle; 46. Guide compartment; 5. Two-way electric push rod; 51. Second connecting rod; 52. Third baffle; 53. Through hole; 54. Through groove; 6. Third connecting rod; 61. Push plate; 7. Third servo motor; 71. Rotary rod; 72. Fourth connecting rod; 73. Float; 8. Lock block; 81. Lock groove. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1: Please refer to Figures 1 to 9 The present invention provides a technical solution: a construction device for ultra-shallow overburden replacement concrete in shield tunnels crossing rivers, including a body 1 and a drive mechanism installed on the body 1. It also includes a suction assembly, including a suction cylinder 21 fixedly installed inside the body 1, and a piston 22 movably installed inside the suction cylinder 21. A driven plate 24 is fixedly installed at the bottom of the piston 22, and an eccentric wheel 2 is provided below the driven plate 24. A suction pipe 25 is fixedly installed on one side of the suction cylinder 21, and a collection box 26 is provided on the body 1. When the drive mechanism is working, it can drive the suction assembly to suck up sludge for collection.

[0021] The top of the inner cavity of the suction cylinder 21 is fixedly connected to a first elastic column 3, the bottom of the first elastic column 3 is fixedly connected to a first baffle 31, the bottom of the first baffle 31 is fixedly connected to a second elastic column 32, and the other end of the second elastic column 32 is fixedly connected to the piston 22.

[0022] It also includes a dredging assembly, including a rack 4 fixedly connected to the driven plate 24, and a gear 41 meshing with the rack 4. A first connecting rod 42 is fixedly installed on the gear 41, and a bucket 43 is fixedly installed on the other end of the first connecting rod 42. A second servo motor 44 is fixedly installed on the bucket 43, and a second baffle 45 is fixedly installed on the output shaft of the second servo motor 44. Guide compartments 46 are fixedly installed on both sides of the collection box 26.

[0023] The drive mechanism includes a dual-axis servo motor 11 fixedly installed inside the body 1. A first wheel 12 is fixedly installed on the output shaft of the dual-axis servo motor 11. A transmission belt 13 is connected to the outer surface of the first wheel 12. A second wheel 14 is connected to the other side of the transmission belt 13. A rotating shaft 15 is fixedly installed in the middle of the second wheel 14. Drive wheels 16 are fixedly installed at both ends of the rotating shaft 15.

[0024] Specifically, anti-trapping pins are fixedly installed on the outer periphery of the drive wheel 16. The top of the suction cylinder 21 is connected to the collection box 26, and the bottom of the suction tube 25 penetrates through the body 1 and extends to the outside of the body 1. By starting the dual-axis servo motor 11, the first rotating wheel 12 can be driven to rotate, so that the transmission belt 13 drives the second rotating wheel 14. The second rotating wheel 14 can drive the rotating shaft 15, so that the drive wheel 16 rotates, thereby driving the device to move. When the rotating shaft 15 rotates, it can drive the eccentric wheel 2, so that the driven plate 24 drives the piston rod part of the piston 22. The piston 22 is also fitted with a return spring 23 on the outer periphery of the part outside the suction cylinder 21, which is used to reset the piston 22 so as to continuously drive the piston 22. 2. Under reciprocating motion, negative pressure is generated, which draws the sludge into the inner cavity of the suction cylinder 21 through the suction tube 25. Under the compression of the piston 22, it enters the collection box 26. To prevent the sludge from flowing out of the suction tube 25, the suction cylinder 21 is provided with a first elastic column 3, a first baffle 31, and a second elastic column 32. The elastic force of the first elastic column 3 is greater than that of the second elastic column 32. When the piston 22 performs the suction operation, it will stretch the second elastic column 32. At this time, the stretching range of the second elastic column 32 is greater than that of the first elastic column 3, which will prevent the first baffle 31 from blocking the suction tube 25, allowing the sludge to enter the suction cylinder 21 smoothly. When the piston 22 squeezes the sludge into the collection box 26, the first baffle 31 will reset to block the suction tube 25, preventing the sludge from entering the suction tube 25 again. Furthermore, when the driven plate 24 is driven, it can drive the rack 4 to move up and down reciprocally, thereby driving the gear 41 to rotate, causing the bucket 43 to flip up and down. When the bucket 43 flips to the bottom, it can collect silt. When the bucket 43 is driven to flip upward, the second servo motor 44 can be started first to drive the second baffle 45 to close the inner cavity of the bucket 43 to prevent silt from flowing out. When the bucket 43 flips to the top, it will dock with the guide chamber 46. At this time, the second servo motor 44 is started again to drive the second baffle 45 to flip, so that the silt in the bucket 43 is guided into the collection box 26 for collection, improving the collection efficiency.

[0025] Example 2: Please refer to Figure 8 A bidirectional electric push rod 5 is fixedly installed on the top of the collection box 26. A second connecting rod 51 is fixedly installed on the output shaft of the bidirectional electric push rod 5. A third baffle 52 is fixedly installed at the bottom of the second connecting rod 51. A through hole 53 is opened at the bottom of the collection box 26.

[0026] A third connecting rod 6 is fixedly installed on one side of the third baffle 52, and a push plate 61 is fixedly installed on the other end of the third connecting rod 6.

[0027] Based on Example 1, when the collection box 26 is full of sludge, the bottom of the guide compartment 46 can be suspended by a crane rope. The end of the guide compartment 46 is T-shaped to prevent the rope from falling off. Alternatively, a lifting ring can be fixed on the guide compartment 46 for lifting. Before lifting, the bidirectional electric push rod 5 needs to be activated to drive the second connecting rod 51 to move. The second connecting rod 51 will drive the third baffle 52 to move and block the through hole 53 to prevent sludge from falling from the through hole 53. Compared with directly using the bucket of the sludge dredging truck to dredge the sludge, which is easy to cause the sludge to flow out with the water, the present invention uses a closed device to collect the sludge, which can improve the collection efficiency and prevent the sludge from flowing out. When it is necessary to discharge the sludge, the third baffle 52 can be reset by activating the bidirectional electric push rod 5, so that the sludge can be discharged from the through hole 53. At the same time, the movement of the third baffle 52 will drive the third connecting rod 6 to move, so that the push plate 61 moves to both sides of the collection box 26 to assist the sludge to flow out from the through hole 53. The guide chamber 46 is designed with an inclination to prevent the sludge from being discharged from the guide chamber 46 when the push plate 61 moves. The upper surface of the collection box 26 is also provided with a relief groove that matches the second connecting rod 51 to facilitate the movement of the second connecting rod 51. It should be noted that the push plate 61 connected to the third connecting rod 6 on one side is not the same as the push plate 61 connected to the third connecting rod 6, so as to avoid interference between the two push plates 61.

[0028] Example 3: Please refer to Figures 1 to 3 ,and Figure 10It also includes a floating boat assembly, including a third servo motor 7 fixedly installed on both sides of the body 1, a rotating rod 71 fixedly installed on the output shaft of the third servo motor 7, a fourth connecting rod 72 fixedly installed on the rotating rod 71, and a floating plate 73 fixedly installed on the other end of the fourth connecting rod 72.

[0029] A locking block 8 is fixedly installed on the fourth connecting rod 72, and a locking groove 81 adapted to the locking block 8 is opened on the collection box 26.

[0030] The float plate 73 has a clearance groove adapted to the drive wheel 16, and the two ends of the float plate 73 are curved.

[0031] Specifically, after the dredging operation is completed and the concrete is poured, when vibration is required, the third servo motor 7 can be started to drive the rotating rod 71 to rotate, so that the fourth connecting rod 72 drives the floating plate 73 to flip, thereby changing the device from the dredging state to the floating vibration state. A fixing groove can be opened on the driven plate 24 to fix the vibrating rod to it. As the drive wheel 16 moves, it will drive the vibrating rod to move and follow the driven plate 24 up and down to increase the vibration range and increase the vibration effect. It should be noted that the two sides of the machine body 1 are provided with slots that are compatible with the fourth connecting rod 72, so that the fourth connecting rod 72 can flip up and down. When the floating plate 73 has not changed shape, the locking block 8 is locked into the locking groove 81 to position the collection box 26 and improve the stability of the collection box 26.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shield tunneling device for ultra-shallow overburden replacement concrete construction, comprising a machine body and a drive mechanism mounted on the machine body, characterized in that: The drive mechanism includes a dual-axis servo motor fixedly installed inside the machine body. A first wheel is fixedly installed on the output shaft of the dual-axis servo motor. A transmission belt is driven to the outer surface of the first wheel. A second wheel is driven to the other side of the transmission belt. A shaft is fixedly installed in the middle of the second wheel. Drive wheels are fixedly installed at both ends of the shaft. It also includes a suction assembly, comprising a suction cylinder fixedly installed inside the machine body and a piston movably installed inside the suction cylinder. A driven plate is fixedly installed at the bottom of the piston, and an eccentric wheel is provided below the driven plate. A suction tube is fixedly installed on one side of the suction cylinder, and a collection box is provided on the machine body. When the drive mechanism is in operation, it can drive the suction assembly to suck up sludge for collection.

2. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 1, characterized in that: The top of the inner cavity of the suction cylinder is fixedly connected to a first elastic column, the bottom of the first elastic column is fixedly connected to a first baffle, the bottom of the first baffle is fixedly connected to a second elastic column, and the other end of the second elastic column is fixedly connected to a piston.

3. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 1, characterized in that: It also includes a dredging assembly, comprising a rack fixedly connected to a driven plate and a gear meshing with the rack. A first connecting rod is fixedly mounted on the gear, and a bucket is fixedly mounted on the other end of the first connecting rod. A second servo motor is fixedly mounted on the bucket, and a second baffle is fixedly mounted on the output shaft of the second servo motor. Guide compartments are fixedly mounted on both sides of the collection box.

4. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 1, characterized in that: A bidirectional electric push rod is fixedly installed on the top of the collection box, a second connecting rod is fixedly installed on the output shaft of the bidirectional electric push rod, a third baffle is fixedly installed on the bottom of the second connecting rod, and a through hole is opened at the bottom of the collection box.

5. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 4, characterized in that: A third connecting rod is fixedly installed on one side of the third baffle, and a push plate is fixedly installed on the other end of the third connecting rod.

6. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 1, characterized in that: It also includes a floating boat assembly, including a third servo motor fixedly installed on both sides of the body, a rotating rod fixedly installed on the output shaft of the third servo motor, a fourth connecting rod fixedly installed on the rotating rod, and a float plate fixedly installed at the other end of the fourth connecting rod.

7. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 6, characterized in that: A locking block is fixedly installed on the fourth connecting rod, and a locking groove adapted to the locking block is opened on the collection box.

8. The shield tunneling device for ultra-shallow overburden replacement concrete construction according to claim 6, characterized in that: The float plate has a clearance groove adapted to the drive wheel, and the two ends of the float plate are curved.

9. The method of using the shield tunneling device for ultra-shallow overburden replacement concrete construction according to any one of claims 1-8, characterized in that: Includes the following steps: S1: By starting the dual-axis servo motor, the drive wheel can be driven and the piston can be driven at the same time. In conjunction with the suction tube, the sludge is sucked up and concentrated in the collection box. When the collection box is collected, it is directly taken out by the crane. S2: When the collection box is full and lifted out, the second connecting rod is moved by activating the bidirectional electric push rod, so that the third baffle blocks the through hole. When the collection box is lifted to the mud transportation point, the third baffle is removed to discharge the sludge. S3: After the silt is removed, concrete needs to be poured. After the concrete is poured, the third servo motor needs to be started to unfold the floating plate, change the equipment from the silt removal state to the floating vibration state, and bind the vibrator to the driven plate for reciprocating vibration.

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