A model simulation test device for a tunnel overpassing an existing tunnel

Abstract

The application discloses a model simulation test device for a tunnel crossing an existing tunnel, main body part one, main body part two, a guide mechanism and a shield simulation mechanism, the shield simulation mechanism can simulate the disturbance of a shield machine to the surrounding soil when the shield machine is working, when the shield simulation mechanism is rotating and vibrating at the same time, the elastic connector one, the connector two and the elastic connector three of the guide mechanism can reduce the influence of the vibration of the shield simulation mechanism on the guide ring, at the same time, the guide groove adopts a deep U-shaped groove, the guide ring is slidably connected with the guide groove through the connecting rod one and the sliding ring, the influence of the vibration of the shield simulation mechanism on the guide ring can be further reduced, and it is ensured that the shield simulation mechanism can move along the length direction of the guide rod from one end to the other end. The device will not cause the resonance of the guide mechanism in the test process, the simulation test can be smoothly carried out, and the reliability of the simulation test result is ensured.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering technology, and in particular to a model simulation test device for a tunnel crossing an existing tunnel. Background Technology

[0002] During the construction of a tunnel that crosses an existing tunnel, when the tunnel boring machine (TBM) passes over the existing tunnel, the TBM will cause significant disturbance to the surrounding soil and rock during its operation. Furthermore, due to its own weight, the TBM will cause a significant positional shift in the existing tunnel below due to the unloading effect.

[0003] Existing tunnel overpass simulation test devices typically include an overpass tunnel simulation mechanism and an existing tunnel simulation mechanism. The overpass tunnel simulation mechanism is usually pulled by a traction rope. In order to prevent the traction rope from shifting when the tunnel soil sample is filled and compacted, some tunnel simulation test devices adopt a method of continuously tightening the traction rope to prevent the traction rope from shifting.

[0004] When conducting tunnel shield simulation experiments, the test device needs to simulate the disturbance of the soil by the shield machine. Although the traditional method of keeping the traction rope continuously taut can ensure the smooth progress of the test, the taut traction rope will reduce the disturbance effect of the simulation device on the soil. In addition, the traction rope is embedded in the soil, and the shield simulation test device will cause slight resonance of the traction rope during vibration. This will cause the soil and rock of the tunnel sample in front of the shield simulation test device to loosen in advance, thus reducing the experimental effect of the simulation test device. Summary of the Invention

[0005] This invention provides a model simulation test device for tunnels crossing existing tunnels, which is used to solve the resonance problem of the guide mechanism during tunnel shield simulation tests.

[0006] To achieve the above objectives, a model simulation test device for a tunnel crossing an existing tunnel is provided, comprising:

[0007] The main body component one has several legs fixedly connected to its bottom surface, which are used to support the entire device.

[0008] Main component two, mounted on main component one, is used to simulate multi-angle tunnel intersection tests; and

[0009] The guiding mechanism, mounted on the main body component two, ensures the guidance of the simulation experimental device and guarantees the smooth conduct of the experiment; and

[0010] The shield tunneling simulation mechanism is installed on the guide mechanism and is used to simulate the disturbance of the soil by the shield tunneling machine.

[0011] Furthermore, the main body component one includes a circular ring component one, with a hoop fixedly connected to the upper end face of the circular ring component one, a circular slide rail fixedly connected to the upper end face of the hoop, a mounting protrusion fixedly connected to the outer end face of the hoop, a mechanism base plate fixedly connected to the lower end face of the circular ring component one, and several support feet fixedly connected at equal intervals to the outer side of the bottom surface of the mechanism base plate, and a test window one symmetrically opened along the radial direction on one side end face of the circular ring component one, with mounting plates fixedly connected to both sides of the test window one.

[0012] Furthermore, the main body component two includes a circular ring component two. Test windows two are symmetrically arranged radially on the side end face of the circular ring component two. Mounting plates two are fixedly connected to both sides of the test windows two. A toothed ring is fixedly connected to the upper end face of the circular ring component two. A retaining ring is fixedly connected to the lower end face of the circular ring component two, and the retaining ring is fitted inside the retaining ring. A limit ring is fixedly connected to the lower end face of the retaining ring. Several cylinder fixing plates are fixedly connected at equal intervals on the side end face of the circular ring component two. A cylinder one is fixedly connected to the cylinder fixing plate via a cylinder retaining ring. A telescopic rod one is fixedly connected to the drive end of the cylinder one. An adapter is fixedly connected to the lower end of the telescopic rod. A circular track pulley is fixedly connected to the lower end of the adapter. The circular track pulley is slidably mounted on a circular slide rail. A mechanism connecting plate one is fixedly connected to one side of the upper inner wall of the circular ring component two. A mechanism connecting plate three is fixedly connected to the other side of the upper inner wall of the circular ring component two. A traction through hole one is opened on the mechanism connecting plate three. A mechanism connecting plate two is fixedly connected to the end face of the mechanism connecting plate three away from the center of the circular ring component two.

[0013] Furthermore, a motor three is fixedly connected to the upper end of the mounting plate, and a rotating shaft three is fixedly connected to the drive end of the motor three. A gear is fixedly connected to the upper end of the rotating shaft three, and the gear meshes with a gear ring. A connecting frame is provided between the mounting plate and the rotating shaft three. The connecting frame includes a connecting main plate, a connecting base plate is fixedly connected to the lower end of the connecting main plate, and the connecting base plate is fixedly connected to the mounting plate. A connecting top plate is fixedly connected to the upper end of the connecting main plate, and a bearing is embedded through the connecting top plate. The bearing is sleeved on the rotating shaft three, the outer ring of the bearing is fixedly connected to the connecting top plate, and the inner ring of the bearing is fixedly connected to the rotating shaft three. A protective cover is fixedly connected to the connecting top plate through a connecting support plate, and the protective cover is located outside the gear.

[0014] Furthermore, the shield tunneling simulation mechanism includes a motor, a rotating shaft, a rotating plate, an air pump, and a mounting plate. The end of the air pump away from the rotating shaft is fixedly connected to the rotating shaft. The mounting plate and the rotating plate are fixedly connected to a mounting circular plate via a connecting rod. The end of the mounting plate away from the rotating plate is fixedly connected to a cylinder. A cylinder extension rod is fixedly connected to the driving end of the cylinder. The suction end and the blowing end of the air pump are connected to the air inlet end of the cylinder through air pipes one and two, respectively. Several fixing plates three are fixedly connected at equal intervals on the side end face of the mounting circular plate. A sleeve two is fixedly connected to one of the fixing plates three, and balancing components are fixedly connected to the remaining fixing plates three.

[0015] Furthermore, the second sleeve includes a second sleeve body, on which an inner cavity channel is opened through. The cylinder telescopic rod is located on one side of the inner cavity channel, and the other side of the inner cavity channel of the second sleeve is fitted with a second telescopic rod. The second telescopic rod is fixedly connected to the cylinder telescopic rod. A counterweight is fixedly connected to the second telescopic rod. Several outer shell connecting rods are fixedly connected at equal intervals on the side end face of the rotating plate. The outer shell connecting rod is fixedly connected to the side of the outer shell connecting rod near the motor one. The outer shell connecting rod is fixedly connected to the side of the outer shell connecting rod away from the motor one. Several soil breakers one are fixedly connected to the side end face of the outer shell two away from the motor one. Several mounting arc plates are fixedly connected at equal intervals on the outer shell two. Several soil breakers two are fixedly connected to the mounting arc plates. A connecting rod three is fixedly connected to the outer shell of the motor one. A connecting rod four is fixedly connected to the upper end of the connecting rod three. A soil breaking blade is fixedly connected to the side end of the connecting rod four. A connecting plate three is fixedly connected to the upper end of the connecting rod four.

[0016] Furthermore, the guiding mechanism includes a guide rod with a guide groove, a guide component slidably disposed in the guide groove, a fixing plate 1 fixedly connected to one end of the guide rod, a traction through hole 2 opened on the fixing plate 1, a fixing plate 2 fixedly connected to the other end of the guide rod, the fixing plate 1 fixedly connected to the mechanism connecting plate 3, and the fixing plate 2 fixedly connected to the mechanism connecting plate 1.

[0017] Furthermore, the guide assembly includes a guide ring, a connecting rod 1 is fixedly connected to the inner end face of the guide ring, a sliding ring is fixedly connected to the lower end of the connecting rod, the connecting rod 1 and the sliding ring are slidably disposed in the guide groove, a fixing rod is fixedly connected to one end face of the connecting rod, an elastic connector 1 and an elastic connector 3 are fixedly connected to both sides of the guide ring respectively, and an elastic connector 2 is fixedly connected to the upper end of the outer side of the guide ring.

[0018] Furthermore, a connecting telescopic component 1 is fixedly connected to the side of the elastic connector 1 away from the guide ring, and a connecting sleeve 1 is fitted on the connecting telescopic component 1. A connecting sleeve 2 is fixedly connected to the side of the elastic connector 3 away from the guide ring. The connecting sleeve 1 and the connecting sleeve 2 are fixedly connected by a connecting plate 1. A connecting telescopic component 2 is fitted on the connecting sleeve 2. A connecting sleeve 3 is fixedly connected to the connecting telescopic component 2. A connecting telescopic component 3 is fitted on the connecting sleeve 3. The connecting telescopic component 3 is fixedly connected to the end of the elastic connector 2 away from the guide ring. An adapter plate is fixedly connected to the bottom surface of the connecting sleeve 1. A connecting telescopic component 4 is fixedly connected to the lower end of the adapter plate. A connecting sleeve 4 is fitted on the connecting telescopic component 4. A connecting rod 2 is fixedly connected to the bottom surface of the connecting sleeve 4. A connecting plate 2 is fixedly connected to the lower end of the connecting rod 2. The connecting plate 2 and the connecting plate 3 are fixedly connected.

[0019] Furthermore, the elastic connector includes a fixed end, one end of which is fixedly connected to the connecting telescopic member, and the other side of the fixed end is fixedly connected to a sleeve. A telescopic rod is fitted on the sleeve, and a fixed end is fixedly connected to the side of the telescopic rod away from the sleeve. The fixed end is fixedly connected to a guide ring. A compression sleeve and a spring are fitted on the outside of the sleeve. One end of the spring is fixedly connected to the compression sleeve, and the other end of the spring is fixedly connected to the fixed end. A fastening bolt is threadedly connected to the compression sleeve through a threaded hole.

[0020] The beneficial effects of this invention are:

[0021] 1. The shield tunneling simulation mechanism of this device can simulate the disturbance of the surrounding soil by the shield tunneling machine during operation. The extension of the telescopic rod is adjusted by cylinder two to adjust the degree of outward protrusion of the counterweight, thereby adjusting the vibration amplitude of the outer shell two and the soil breaker one and two on it during rotation, improving the versatility of this device in simulation experiments. When the shield tunneling simulation mechanism rotates and vibrates, the elastic connector one, connector two and elastic connector three of the guide mechanism can reduce the impact of the shield tunneling simulation mechanism's vibration on the guide ring. At the same time, the guide groove adopts a deep U-shaped groove, and the guide ring is slidably connected to the guide groove through connecting rod one and sliding ring, which can further reduce the impact of the shield tunneling simulation mechanism's vibration on the guide ring, ensuring that the shield tunneling simulation mechanism can move from one end to the other along the length of the guide rod itself. This device will not cause resonance of the guide mechanism during the test, ensuring the reliability of the simulation test results.

[0022] 2. In the simulation test of this device, the drive end of motor three drives the gear to rotate, which in turn drives the main body part two to rotate. The rotation of the main body part two facilitates the adjustment of the motion trajectory of the shield tunneling simulation mechanism inside the main body part two and the angle of the existing tunnel simulation mechanism installed on the main body part one. This allows for the simulation of different excavation tunnel trajectories and the angle between them and the existing tunnel trajectories, thus improving the versatility of this device in simulation tests. The extension and retraction of telescopic rod one is adjusted by the drive end of cylinder one, thereby adjusting the relative distance between the main body part one and the main body part two. This allows for the simulation of different soil thicknesses between the overpass tunnel and the existing tunnel, further improving the versatility of this device.

[0023] 3. When the test is halfway through, it is necessary to change the vibration amplitude of the shield tunneling simulation mechanism. Since the shield tunneling simulation mechanism is buried in the rock and soil inside the main body component one and main body component two at this time, it is not convenient to adjust the vibration amplitude of the shield tunneling simulation mechanism by adjusting cylinder two. Instead, the fastening bolt one can be loosened, and then the stroke of the compression sleeve can be compressed. Then the fastening bolt one can be tightened so that the fastening bolt one abuts against the sleeve one to fix the position of the compression sleeve. This changes the feedback force of elastic connector one. The above operation on elastic connector one is repeated for elastic connector two and elastic connector three to change the feedback force of elastic connector two and elastic connector three. This allows the vibration amplitude of the simulation mechanism to be adjusted, so that the impact of different vibration amplitudes on the existing tunnel simulation mechanism can be measured in a single-pass simulation experiment.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a three-dimensional structural view of the second main component of the present invention;

[0028] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention;

[0029] Figure 4 This is a diagram showing the connection relationship between the motor, shaft, and gear of the present invention.

[0030] Figure 5 This is a three-dimensional structural diagram of the guiding mechanism of the present invention;

[0031] Figure 6 This is a three-dimensional structural diagram of the guide component of the present invention;

[0032] Figure 7 This is a three-dimensional structural schematic diagram of the elastic connector of the present invention;

[0033] Figure 8 This is a cross-sectional view showing the connection relationship between the connecting sleeve three and the connecting telescopic member three of the present invention.

[0034] Figure 9 This is a three-dimensional structural diagram of the shield tunneling simulation mechanism of the present invention;

[0035] Figure 10 This is a partial three-dimensional structural schematic diagram of the shield tunneling simulation mechanism of the present invention;

[0036] Figure 11 This is a schematic diagram of a portion of the three-dimensional structure of the shield tunneling simulation mechanism of the present invention from another perspective;

[0037] Figure 12 This is a cross-sectional view of the cylinder 2, the cylinder telescopic rod, and the connection relationship of the telescopic rod 2 according to the present invention;

[0038] Figure 13 This is a three-dimensional structural diagram of the traction mechanism of the present invention;

[0039] Legend: 1-Support leg, 2-Connecting frame, 21-Connecting main board, 22-Connecting base plate, 23-Connecting top plate, 3-Protective cover, 4-Main body component one, 41-Circular ring component one, 42-Clamping ring, 43-Circular slide rail, 44-Mechanism base plate, 45-Test window one, 46-Mounting plate one, 47-Mounting protrusion, 5-Main body component two, 51-Circular ring component two, 52-Test window two, 53-Mounting plate two, 54-Gear ring, 55-Snap ring, 56-Limiting ring, 57-Cylinder fixing plate, 58-Cylinder clamping ring, 59-Cylinder one, 510-Telescopic rod one, 511-Adapter, 512-Mechanism connecting plate one, 513-Mechanism connecting plate two, 514-Traction through hole one, 51 5-Mechanism connecting plate three, 6-Guide mechanism, 61-Guide rod, 62-Fixed plate one, 63-Traction through hole two, 64-Fixed plate two, 65-Guide groove, 66-Guide assembly, 661-Guide ring, 662-Connecting rod one, 663-Sliding ring, 664-Fixed rod, 665-Elastic connector one, 6651-Fixed end one, 6652-Compression sleeve, 6653-Sleeve one, 6654-Fasting bolt one, 6655-Spring, 6656-Telescopic rod one, 6657-Fixed end two, 666-Elastic connector two, 667-Elastic connector three, 668-Connecting telescopic part one, 669-Connecting sleeve one, 6610-Connecting plate one, 6611- Connecting Sleeve II, 6612-Connecting Expansion Joint II, 6613-Connecting Sleeve III, 66131-Sleeve Inner Cavity, 66132-Threaded Hole, 6614-Connecting Expansion Joint III, 6615-Fastening Bolt II, 6616-Adapter Plate, 6617-Connecting Expansion Joint IV, 6618-Connecting Sleeve IV, 6619-Connecting Rod II, 6620-Connecting Plate II, 7-Shield Tunneling Simulation Mechanism, 71-Motor I, 72-Connecting Rod III, 73-Connecting Rod IV, 74-Soil Breaking Blade, 75-Connecting Plate III, 76-Rotating Shaft I, 77-Rotating Plate, 78-Outer Shell Connecting Rod, 79-Blowing / Suction Pump, 710-Air Pipe I, 711-Air Pipe II, 712-Mounting Circular Plate, 713-Fixing Plate III 714-Balancing component, 715-Sleeve II, 7151-Sleeve II main body, 7152-Inner cavity channel, 716-Cylinder II, 717-Cylinder telescopic rod, 718-Telescopic rod II, 719-Counterweight block, 720-Connecting rod IV, 721-Soil breaker I, 722-Outer shell I, 723-Outer shell II, 724-Mounting arc plate, 725-Soil breaker II, 8-Traction mechanism, 81-Connecting plate, 82-Connecting side plate, 83-Fixed side plate, 84-Motor II, 85-Rotating shaft II, 86-Traction wheel, 87-Mounting frame, 89-Guide wheel, 9-Motor III, 10-Rotating shaft III, 11-Gear, 12-Bearing, 13-Connecting support plate, 14-Circular track pulley. Detailed Implementation

[0040] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0041] This combination Figures 1 to 13 This invention describes a model simulation test device for a tunnel crossing an existing tunnel. Specifically, the model simulation test device based on a tunnel crossing an existing tunnel is constructed as an integrated structure, including: a main body 4, a second main body 5, a guide mechanism 6, and a shield tunneling simulation mechanism 7. The shield tunneling simulation mechanism 7 can simulate the disturbance of the surrounding soil by the shield machine during operation, and can adjust the vibration amplitude of the outer shell 723 and the earthbreakers 721 and 725 on it during rotation, improving the versatility of the device in simulation experiments. When the shield tunneling simulation mechanism 7 rotates and vibrates, the elasticity of the guide mechanism 6... Connector 1 (665), connector 2 (666), and elastic connector 3 (667) can reduce the impact of the vibration of the shield simulation mechanism 7 on the guide ring 661. At the same time, the guide groove 65 adopts a deep U-shaped groove, and the guide ring 661 is slidably connected to the guide groove 65 through connecting rod 1 (662) and sliding ring 663, which can further reduce the impact of the vibration of the shield simulation mechanism 7 on the guide ring 661. This ensures that the shield simulation mechanism 7 can move from one end to the other along the length of the guide rod 61. This device will not cause resonance of the guide mechanism during the test, ensuring that the simulation test can be carried out smoothly and guaranteeing the reliability of the simulation test results.

[0042] Please refer to Figures 1 to 13 A model simulation test device for a tunnel crossing an existing tunnel, comprising:

[0043] The main body 4 has several legs 1 fixedly connected to its bottom surface. The legs 1 are used to support the entire device.

[0044] Main component 2, part 5, is fitted onto main component 1, part 4, and is used to simulate multi-angle tunnel intersection tests; and

[0045] Guide mechanism 6, mounted on main body component 2 5, is used to ensure the guidance of the simulation experimental device and guarantee the smooth conduct of the experiment; and

[0046] The shield simulation mechanism 7 is installed on the guide mechanism 6 and is used to simulate the disturbance of the soil by the shield machine.

[0047] In this embodiment, the tunnel simulation test device specifically refers to a tunnel overpass simulation test device, which typically includes an overpass tunnel simulation mechanism and an existing tunnel simulation mechanism. The overpass tunnel simulation mechanism generally takes many forms, depending on the type of simulation test. In this embodiment, the overpass tunnel simulation mechanism mainly includes a guide mechanism 6 and a shield simulation mechanism 7. The existing tunnel simulation mechanism is usually a multi-segment non-rigidly connected cylinder, such as a multi-segment cylinder connected by steel wire ropes. Multiple sets of test monitoring devices are usually installed on its outer wall to monitor the displacement of the overpass tunnel simulation mechanism on the existing tunnel simulation mechanism below it during the experiment.

[0048] The power supply method of the shield tunneling simulation mechanism 7 is as follows: The shield tunneling simulation mechanism 7 operates within a simulated tunnel soil and rock sample. Due to its unique working environment, special explanation is provided below. For example, the shield tunneling simulation mechanism 7 includes a motor 71, which can be powered by a battery. The battery is located below the casing of the motor 71 and is electrically connected to the receiving end of the motor 71 via a power supply cable. The power supply cable and its connection are protected by the casing. Since the continuous working time of the shield tunneling simulation mechanism 7 is not long, a large-capacity battery is unnecessary, as the weight of the battery will not significantly affect the overall weight of the shield tunneling simulation mechanism 7. Alternatively, the power supply cable can be directly connected to the power source and concealed. For example, the shield tunneling simulation mechanism 7 includes connecting rods 72 and 73. Grooves are provided along the length of connecting rods 72 and 73, allowing the power supply cable to be placed and protected within these grooves.

[0049] Circular track pulley 14 is a type of pulley used on circular tracks. It typically consists of multiple pairs of pulleys, including vertical pulleys and lateral pulleys. Vertical pulleys are usually used for support, while lateral pulleys are usually used for guidance and limiting to prevent deviation during movement.

[0050] In this application, the shield tunneling simulation mechanism 7 is installed on the guide component 66 of the guide mechanism 6 through the test window 2 52. The guide component 66 is dragged along the guide rod 61 to the end away from the traction mechanism 8. The rotation of the motor 2 84 drives the traction wheel 86 to rotate, thereby causing the traction rope to retract, pulling the shield tunneling simulation mechanism 7 along one end of the guide rod 61 to the other end, and recording the experimental data on the monitoring device. In particular, the shield tunneling simulation mechanism 7 can simulate the disturbance of the surrounding soil by the shield machine during operation. The extension of the telescopic rod 2 718 is adjusted by the cylinder 2 716 to adjust the degree of outward protrusion of the counterweight 719, thereby adjusting the vibration amplitude of the outer shell 2 723 and the earthbreaker 1 721 and earthbreaker 2 725 during rotation. To improve the versatility of this device in simulation experiments, when the shield simulation mechanism 7 rotates and vibrates, the elastic connectors 665, 666, and 667 of the guide mechanism 6 can reduce the impact of the vibration of the shield simulation mechanism 7 on the guide ring 661. At the same time, the guide groove 65 adopts a deep U-shaped groove, and the guide ring 661 is slidably connected to the guide groove 65 through the connecting rod 662 and the sliding ring 663, which can further reduce the impact of the vibration of the shield simulation mechanism 7 on the guide ring 661. This ensures that the shield simulation mechanism 7 can move from one end to the other along the length of the guide rod 61. This device will not cause resonance of the guide mechanism during the test, ensuring that the simulation test can be carried out smoothly.

[0051] As shown in Figure 3 of this embodiment, the main body 4 includes a ring 41. A hoop 42 is fixedly connected to the upper end face of the ring 41. A circular slide rail 43 is fixedly connected to the upper end face of the hoop 42. An mounting protrusion 47 is fixedly connected to the outer end face of the hoop 42. A mechanism base plate 44 is fixedly connected to the lower end face of the ring 41. Several support legs 1 are fixedly connected at equal intervals to the outer side of the bottom surface of the mechanism base plate 44. Test windows 45 are symmetrically opened radially on the side end face of the ring 41. Mounting plates 46 are fixedly connected to both sides of the test windows 45. In use, the mounting plates 46 are used to fix and install the existing tunnel simulation mechanism and the cover plate to prevent soil leakage. The internal space of the ring 41 and the mechanism base plate 441 is used to hold the soil for the simulation test. The hoop 42 is used to movably engage with the main body 5, so that the main body 4 and the main body 5 can rotate relative to each other to realize the test simulation of tunnel intersection at multiple angles.

[0052] As shown in Figure 2 of this embodiment, the main body component 2 5 includes a ring component 2 51. Test windows 2 52 are symmetrically opened radially on the side end face of the ring component 2 51. Mounting plates 2 53 are fixedly connected to both sides of the test windows 2 52. A toothed ring 54 is fixedly connected to the upper end face of the ring component 2 51. A retaining ring 55 is fixedly connected to the lower end face of the ring component 2 51, and the retaining ring 55 is sleeved inside the clamping ring 42. A limit ring 56 is fixedly connected to the lower end face of the retaining ring 55. Several cylinder fixing plates 57 are fixedly connected at equal intervals on the side end face of the ring component 2 51. A cylinder 1 59 is fixedly connected to the cylinder fixing plate 57 via a cylinder clamping ring 58. A telescopic rod 1 510 is fixedly connected to the drive end of the cylinder 1 59. The lower end of the telescopic rod 510 is fixedly connected to an adapter 511, and the lower end of the adapter 511 is fixedly connected to a circular track pulley 14. The circular track pulley 14 is slidably mounted on a circular slide rail 43. A mechanism connecting plate 512 is fixedly connected to one side of the upper inner wall of the ring 51, and a mechanism connecting plate 515 is fixedly connected to the other side of the upper inner wall of the ring 51. A traction through hole 514 is provided on the mechanism connecting plate 515. A mechanism connecting plate 513 is fixedly connected to the end face of the mechanism connecting plate 515 away from the center of the ring 51. In this embodiment, there are two mechanism connecting plates 512, 513, and 515. The connecting plate 3 (515) is positioned directly above the test window 2 (52). During operation, cylinder 1 (59) supports the main body 2 (5) positioned above the main body 1 (4). The circular track pulley 14 slides on the circular slide rail 43, allowing the angle between the movement trajectory of the shield tunneling simulation mechanism 7 within the main body 2 (5) and the existing tunnel simulation mechanism mounted on the main body 1 (4) to be adjustable. If the movement trajectory of the shield tunneling simulation mechanism 7 is parallel to the existing tunnel simulation mechanism mounted on the main body 1 (4), it can be used to simulate tunnel excavation parallel to an existing tunnel. If the movement trajectory of the shield tunneling simulation mechanism 7 is perpendicular to the existing tunnel simulation mechanism mounted on the main body 1 (4), it can be used to simulate tunnel excavation. The simulation test of the tunnel is perpendicular to the existing tunnel box. Of course, in the simulation test of this device, the angle between the excavated tunnel and the existing tunnel can be arbitrary, which improves the versatility of this device in simulation experiments. By adjusting the extension and retraction of the telescopic rod 510 through the drive end of the cylinder 59, the relative distance between the main body 4 and the main body 5 can be adjusted. Before the soil is filled, the soil thickness between the test monitoring equipment installed on the main body 4 and the shield simulation mechanism 7 set in the main body 5 can be adjusted, so as to simulate the different soil thicknesses between the overpass tunnel and the existing tunnel, further improving the versatility of this device in simulation experiments.

[0053] As shown in Figure 4 of this embodiment, a motor 9 is fixedly connected to the upper end of the mounting plate 47. A rotating shaft 10 is fixedly connected to the drive end of the motor 9. A gear 11 is fixedly connected to the upper end of the rotating shaft 10, and the gear 11 meshes with the gear ring 54. A connecting frame 2 is provided between the mounting plate 47 and the rotating shaft 10. The connecting frame 2 includes a connecting main plate 21. A connecting base plate 22 is fixedly connected to the lower end of the connecting main plate 21. The connecting base plate 22 is fixedly connected to the mounting plate 47. A connecting top plate 23 is fixedly connected to the upper end of the connecting main plate 21. A bearing 12 is embedded through the connecting top plate 23 and is sleeved on the rotating shaft 10. On the 0, the outer ring of bearing 12 is fixedly connected to the connecting top plate 23, and the inner ring of bearing 12 is fixedly connected to the rotating shaft 10. A protective cover 3 is fixedly connected to the connecting top plate 23 through the connecting support plate 13. The protective cover 3 is set on the outside of gear 11 and is used to protect gear 11. During operation, the drive end of motor 9 drives gear 11 to rotate through rotating shaft 10. Since gear 11 meshes with gear ring 54, the rotation of gear 11 can drive the main body part 2 5 to rotate. The rotation of main body part 2 5 can facilitate the adjustment of the movement trajectory of shield simulation mechanism 7 inside main body part 2 5 and the angle of existing tunnel simulation mechanism installed on main body part 1 4.

[0054] As shown in Figures 9 to 12 of this embodiment, the shield tunneling simulation mechanism 7 includes a motor 71. A rotating shaft 76 is fixedly connected to the drive end of the motor 71. A rotating plate 77 is fixedly connected to the rotating shaft 76. A blow-suction pump 79 is fixedly connected to the end of the rotating plate 77 away from the rotating shaft 76. A mounting circular plate 712 is fixedly connected to the end of the blow-suction pump 79 away from the rotating plate 77. The mounting circular plate 712 and the rotating plate 77 are fixedly connected by a connecting rod 720. A cylinder 716 is fixedly connected to the end of the mounting circular plate 712 away from the rotating plate 77. The cylinder 716 is driven... A cylinder extension rod 717 is fixedly connected to the end of the cylinder. The suction end and blowing end of the air pump 79 are connected to the air inlet end of the cylinder 716 through air pipe 1 710 and air pipe 2 711, respectively. Several fixing plates 3 713 are fixedly connected at equal intervals on the side end face of the mounting plate 712. A sleeve 2 715 is fixedly connected to one of the fixing plates 3 713, and a balance component 714 is fixedly connected to the other fixing plates 3 713. The sleeve 2 715 includes a sleeve 2 body 7151, and an inner cavity channel 7152 is opened through the sleeve 2 body 7151. The cylinder extension rod 717 Located on one side of the inner cavity channel 7152, the sleeve 2 715 has a telescopic rod 2 718 sleeved on the other side of the inner cavity channel 7152. The telescopic rod 2 718 is fixedly connected to the cylinder telescopic rod 717. A counterweight 719 is fixedly connected to the telescopic rod 2 718. Several outer shell connecting rods 78 are fixedly connected at equal intervals on the side end face of the rotating plate 77. The outer shell connecting rod 78 is fixedly connected to the outer shell 1 722 on the side closer to the motor 1 71, which is used to protect the rotating shaft 76 of the motor 1 71. The outer shell connecting rod 78 is fixedly connected to the outer shell 2 723 on the side away from the motor 1 71. Several soil breakers 721 are fixedly connected to the side end face away from motor 71. Several mounting arc plates 724 are fixedly connected at equal intervals on the outer casing 723. Several soil breakers 725 are fixedly connected to the mounting arc plates 724. A connecting rod 72 is fixedly connected to the outer casing of motor 71. A connecting rod 73 is fixedly connected to the upper end of the connecting rod 72. A soil breaking plate 74 is fixedly connected to the side end of the connecting rod 73. The soil breaking plate 74 is used to reduce the resistance brought by the connecting rod 73 when the shield simulation mechanism 7 moves forward in the soil. A connecting plate 75 is fixedly connected to the upper end of the connecting rod 73.

[0055] In this embodiment, the weight of the balance component 714 is the same as the weight of the entire assembly consisting of the second sleeve 715, the cylinder telescopic rod 717, the second telescopic rod 718, and the counterweight 719. During operation, the motor 71 drives the rotating plate 77 to rotate via the rotating shaft 76. The rotation of the rotating plate 77 drives the mounting plate 712 to rotate, which in turn drives the balance component 714, the second sleeve 715, the cylinder telescopic rod 717, the second telescopic rod 718, and the counterweight 719 on the mounting plate to rotate. Since the weight of the balance component 714 is the same as the weight of the entire assembly consisting of the second sleeve 715, the cylinder telescopic rod 717, the second telescopic rod 718, and the counterweight 719, the mounting plate 712 can rotate smoothly. In particular, by adjusting the drive end of the second cylinder 716... The cylinder extension rod 717 extends, which in turn pushes the extension rod 718 to extend. The extension of the extension rod 718 causes the counterweight 719 to protrude outward, disrupting the center of gravity of the components on the mounting plate 712. The mounting plate 712 vibrates as it rotates, causing the outer shell 723 and its earthbreakers 721 and 725 to vibrate while rotating. This simulates the disturbance of the surrounding soil by the tunnel boring machine during operation. The extension of the extension rod 718 is adjusted by the cylinder 716 to regulate the degree of outward protrusion of the counterweight 719, thereby adjusting the vibration amplitude of the outer shell 723 and its earthbreakers 721 and 725 during rotation, improving the versatility of the device in simulation experiments.

[0056] As shown in Figure 5 of this embodiment, the guiding mechanism 6 includes a guide rod 61 with a guide groove 65. A guide assembly 66 is slidably disposed within the guide groove 65. One end of the guide rod 61 is fixedly connected to a fixing plate 62, which has a traction through hole 63. The other end of the guide rod 61 is fixedly connected to a fixing plate 64. The fixing plate 62 is fixedly connected to a connecting plate 515, and the fixing plate 64 is fixedly connected to the connecting plate 512. In this embodiment... In the middle, the guide groove 65 is a U-shaped groove. When using it, when installing the fixing plate 1 62 and the mechanism connecting plate 3 515, the traction through hole 2 63 on the fixing plate 1 62 and the traction through hole 1 514 on the mechanism connecting plate 3 515 need to be aligned. At the same time, the guide groove 65 of the traction through hole 1 514 and the traction through hole 2 63 should be aligned so that the traction rope of the traction mechanism 8 can pass through the traction through hole 1 514 and the traction through hole 2 63 and connect to the guide component 66 along the guide groove 65.

[0057] As shown in Figures 6 to 8 of this embodiment, the guide assembly 66 includes a guide ring 661. A connecting rod 662 is fixedly connected to the inner end face of the guide ring 661. A sliding ring 663 is fixedly connected to the lower end of the connecting rod 662. The connecting rod 662 and the sliding ring 663 are slidably disposed in the guide groove 65. A fixing rod 664 is fixedly connected to the side end face of the connecting rod 662. An elastic connector 665 and an elastic connector 667 are fixedly connected to both sides of the guide ring 661, respectively. An elastic connector 666 is fixedly connected to the upper outer end of the guide ring 661. A connecting telescopic member 668 is fixedly connected to the side of the elastic connector 665 away from the guide ring 661. A connecting sleeve 669 is sleeved on the connecting telescopic member 668. A connecting sleeve 6611 is fixedly connected to the side of the elastic connector 667 away from the guide ring 661. Sleeve 1 669 and connecting sleeve 2 6611 are fixedly connected by connecting plate 1 6610. Connecting sleeve 2 6611 is fitted with connecting telescopic component 2 6612. Connecting telescopic component 3 6613 is fixedly connected to connecting telescopic component 2 6612. Connecting telescopic component 3 6614 is fitted on connecting sleeve 3 6613. Connecting telescopic component 3 6614 is fixedly connected to the end of elastic connector 2 666 away from guide ring 661. Adapter plate 6616 is fixedly connected to the bottom surface of connecting sleeve 1 669. Connecting telescopic component 4 6617 is fixedly connected to the lower end of adapter plate 6616. Connecting telescopic component 4 6617 is fitted with connecting sleeve 4 6618. Connecting rod 2 6619 is fixedly connected to the bottom surface of connecting sleeve 4 6618. Connecting plate 2 6620 is fixedly connected to the lower end of connecting rod 2 6619. Connecting plate 2 6620 is fixedly connected to connecting plate 3 75.

[0058] In this embodiment, both the first connecting telescopic component 668 and the second connecting telescopic component 6612 are L-shaped telescopic connecting plates, and the first connecting plate 6610 is an L-shaped connecting plate. Further, for clarity, the example given is the sleeve-type 6613 and the third connecting telescopic component 6614 being fitted together. For instance, a threaded hole 66132 is provided through one end face of the third connecting sleeve 6613, and a second fastening bolt 6615 is threaded onto the threaded hole 66132. The third connecting telescopic component 6614 is fitted into the inner cavity 66131 of the sleeve of the third connecting sleeve 6613. During operation, the second fastening bolt 6615 is tightened to... The connecting expansion joint 6614 is moved away from the connecting expansion joint 6614, allowing it to freely extend and retract on the sleeve 6613. By tightening the fastening bolt 6615, the connecting expansion joint 6614 can be snapped and fixed. The snap-fit ​​connection between the connecting sleeve 6611 and the connecting expansion joint 6612, the connecting expansion joint 668 and the connecting sleeve 669, and the connecting expansion joint 6617 and the connecting sleeve 6618 can all refer to the snap-fit ​​connection between the sleeve 6613 and the connecting expansion joint 6614.

[0059] The elastic connector 665 includes a fixed end 6651, one end of which is fixedly connected to a connecting telescopic member 668, and the other side of the fixed end 6651 is fixedly connected to a sleeve 6653. A telescopic rod 6656 is fitted on the sleeve 6653, and a fixed end 6657 is fixedly connected to the side of the telescopic rod 6656 away from the sleeve 6653. The fixed end 6657 is fixedly connected to a guide ring 661. A compression sleeve 6652 and a spring 6655 are fitted on the outside of the sleeve 6653. One end of the spring 6655 is fixedly connected to the compression sleeve 6652, and the other end of the spring 6655 is fixedly connected to the fixed end 6657. A fastening bolt 6654 is threadedly connected to the compression sleeve 6652 through a threaded hole. In this embodiment, the structure and function of the elastic connectors 666 and 667 are the same as those of the elastic connector 665, and will not be described again here.

[0060] During operation, the guide assembly 66 is slidably positioned within the guide groove 65 of the guide rod 61. Since the connecting plate 6620 of the guide assembly 66 is fixedly connected to the connecting plate 75 of the shield simulation mechanism 7, the guide assembly 66 can drive the shield simulation mechanism 7 to move along the length of the guide rod 61, thus simulating the actual working process of a tunnel boring machine. Specifically, when the shield simulation mechanism 7 rotates and vibrates, the elastic connector 666 connected to the upper end of the guide ring 661, and the elastic connectors 665 and 667 connected to both sides of the guide ring 661, can reduce the impact of the shield simulation mechanism 7's vibration on the guide ring 661. Simultaneously, the guide groove 65 adopts a deep U-shaped groove, and the guide ring 661 is slidably connected to the guide groove 65 via the connecting rod 662 and the sliding ring 663, further reducing the impact of the shield simulation mechanism 7's vibration on the guide ring 661. This ensures that the shield simulation mechanism 7 can move from one end to the other along the length of the guide rod 61, ensuring the simulation... The experiment proceeded smoothly. Furthermore, during the experiment, if it was necessary to change the vibration amplitude of the shield tunneling simulation mechanism 7 halfway through, since the shield tunneling simulation mechanism 7 was buried in the soil and rock inside the main body 4 and main body 5, it was inconvenient to adjust the vibration amplitude of the shield tunneling simulation mechanism 7 by adjusting the cylinder 716. Instead, the fastening bolt 6654 was loosened, and the spring 6655 was compressed by the compression sleeve 6652. Then, the fastening bolt 6654 was tightened so that it pressed against the sleeve 6653, thus fixing the position of the compression sleeve 6652. This changed the feedback force of the elastic connector 665. The same operation was repeated for the elastic connectors 666 and 667 to change the feedback force of the elastic connectors 666 and 667, thereby adjusting the vibration amplitude of the simulation mechanism 7. This allowed the shield tunneling simulation mechanism 7 to measure the impact of different vibration amplitudes on the existing tunnel simulation mechanism during a single-pass simulation experiment.

[0061] By shortening the distances between connecting sleeve 2 6611 and connecting telescopic component 2 6612, connecting telescopic component 1 668 and connecting sleeve 1 669, and sleeve 3 6613 and connecting telescopic component 3 6614, the stroke of spring 6655 can also be compressed, thereby adjusting the vibration amplitude of the simulation mechanism 7. Then, by adjusting the connecting sleeve 4 6618 on connecting telescopic component 4 6617, connecting rod 2 6619 and connecting rod 1 662 are placed on the same vertical line, so that the guide assembly 66 can exert an additional shock absorption effect.

[0062] As shown in Figure 13 of this embodiment, the traction mechanism 8 includes a connecting plate 81. A fixed side plate 83 is fixedly connected to the connecting plate 81 via a connecting side plate 82. A second motor 84 is fixedly connected to the fixed side plate 83. A second rotating shaft 85 is fixedly connected to the drive end of the second motor 84. A traction wheel 86 is coaxially fixedly connected to the second rotating shaft 85. A mounting frame 87 is fixedly connected to the connecting plate 81. A guide wheel 89 is rotatably connected to the mounting frame 87 via a pin. During operation, one end of the traction rope is fixedly connected to the traction wheel 86, and the other end passes over the guide wheel 89, through the first traction through hole 514 and the second traction through hole 63, and then along the guide groove 65 of the guide rod 61 and through the sliding ring 663 before being bound to the fixed rod 664. The rotation of the second motor 84 drives the traction wheel 86 to rotate, thereby causing the traction rope to retract and achieving traction of the shield simulation mechanism 7 connected to the guide mechanism 6.

[0063] The following steps are required when using it:

[0064] 1. Install the shield tunneling simulation mechanism 7 onto the guide component 66 of the guide mechanism 6 through the test window 2 52, and drag the guide component 66 along the guide rod 61 to the end away from the traction mechanism 8.

[0065] 2. Adjust the extension of the telescopic rod 718 by cylinder 716 to adjust the degree of the counterweight 719 protruding outward, thereby adjusting the vibration amplitude of the outer shell 723 and the earthbreaker 721 and earthbreaker 725 on it during the simulation test. After the adjustment is completed, seal the test window 52 with a cover plate.

[0066] 3. Install the existing tunnel simulation mechanism into the main body component 4 through the test window 45, and install the detection device for detecting experimental data on the tunnel simulation mechanism. After installation, seal the test window 45 with a cover plate.

[0067] 4. The drive end of motor 39 drives gear 11 to rotate. The rotation of gear 11 can drive the rotation of main body part 25. The rotation of main body part 25 can facilitate the adjustment of the movement trajectory of shield simulation mechanism 7 inside main body part 25 and the angle of existing tunnel simulation mechanism installed on main body part 14.

[0068] 5. The specific adjustment methods are as follows: If the movement trajectory of the shield tunneling simulation mechanism 7 is parallel to the existing tunnel simulation mechanism installed on the main body component 4, it can be used to simulate tunnel simulation tests where the excavated tunnel is parallel to the existing tunnel. If the movement trajectory of the shield tunneling simulation mechanism 7 is perpendicular to the existing tunnel simulation mechanism installed on the main body component 4, it can be used to simulate tunnel simulation tests where the excavated tunnel is perpendicular to the existing tunnel. Of course, in the simulation test of this device, the angle between the excavated tunnel trajectory and the existing tunnel trajectory can be any angle.

[0069] 6. Adjust the extension and retraction of telescopic rod 510 by adjusting the drive end of cylinder 59, thereby adjusting the relative distance between main body 4 and main body 5. Before filling the soil, the soil thickness between the test monitoring equipment installed on main body 4 and the shield simulation mechanism 7 set in main body 5 can be adjusted, thereby simulating the different soil thickness between the overpass tunnel and the existing tunnel.

[0070] 7. Fill the interior of main body component 4 and main body component 5 with tunnel soil and rock samples for simulation test. Drive the traction wheel 86 to rotate by the rotation of motor 2 84, thereby causing the traction rope to retract and pull the shield simulation mechanism 7 along one end of the guide rod 61 to the other end, and record the experimental data.

[0071] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A model simulation test device for a tunnel crossing an existing tunnel, characterized in that, The main body component 1 (4) has several legs (1) fixedly connected to its bottom surface. The legs (1) are used to support the entire device. Main body component two (5) is fitted onto main body component one (4). Main body component two (5) includes ring component two (51). Test windows two (52) are symmetrically opened radially on the side end face of ring component two (51). Mounting plates two (53) are fixedly connected to both sides of test windows two (52). A toothed ring (54) is fixedly connected to the upper end face of ring component two (51). A retaining ring (55) is fixedly connected to the lower end face of ring component two (51). The ring is fitted inside the clamp (42). A limit ring (56) is fixedly connected to the lower end face of the retaining ring (55). Several cylinder fixing plates (57) are fixedly connected at equal intervals on the side end face of the second ring (51). A cylinder is fixedly connected to the cylinder fixing plate (57) through the cylinder clamp (58). A telescopic rod (510) is fixedly connected to the driving end of the cylinder (59). An adapter (511) is fixedly connected to the lower end of the telescopic rod (510). A circular track pulley (14) is fixedly connected to the lower end of the connector (511). The circular track pulley (14) is slidably mounted on a circular slide rail (43). A mechanism connecting plate (512) is fixedly connected to one side of the upper part of the inner wall of the second ring (51). A mechanism connecting plate (515) is fixedly connected to the other side of the upper part of the inner wall of the second ring (51). A traction through hole (514) is opened on the mechanism connecting plate (515). The mechanism connecting plate (515) is far away from the second ring (511). A mechanism connecting plate two (513) is fixedly connected to one end face of the center; a motor three (9) is fixedly connected to the upper end face of the mounting plate (47), a rotating shaft three (10) is fixedly connected to the driving end of the motor three (9), a gear (11) is fixedly connected to the upper end of the rotating shaft three (10), the gear (11) meshes with the gear ring (54), so that the main body part one (4) and the main body part two (5) can rotate relative to each other, realizing the experimental simulation of multi-angle tunnel intersection; and A guiding mechanism (6) is installed on the main body (5). The guiding mechanism (6) includes a guide rod (61), a guide groove (65) is provided on the guide rod (61), a guide assembly (66) is slidably arranged in the guide groove (65), a fixing plate (62) is fixedly connected to one end of the guide rod (61), a traction through hole (63) is provided on the fixing plate (62), and a fixing plate (64) is fixedly connected to the other end of the guide rod (61). The fixing plate (62) is fixedly connected to the mechanism connecting plate (515), and the fixing plate (64) is fixedly connected to the mechanism connecting plate (512). This mechanism is used to ensure the guiding nature of the simulation experimental device and to ensure that the experiment can proceed smoothly. A shield tunneling simulation mechanism (7) is mounted on a guide mechanism (6). The shield tunneling simulation mechanism (7) includes a motor (71), a rotating shaft (76) is fixedly connected to the drive end of the motor (71), a rotating plate (77) is fixedly connected to the rotating shaft (76), a blow-suction pump (79) is fixedly connected to the end of the rotating plate (77) away from the rotating shaft (76), and a mounting circular plate (712) is fixedly connected to the end of the blow-suction pump (79) away from the rotating plate (77). The mounting circular plate (712) and the rotating plate (77) are fixedly connected by a connecting rod (720). The end of the mounting circular plate (712) away from the rotating plate (77) is fixedly connected to the rotating plate (77). A cylinder two (716) is fixedly connected to the end of the cylinder. A cylinder extension rod (717) is fixedly connected to the drive end of the cylinder two (716). The suction end and the blowing end of the air pump (79) are connected to the air inlet end of the cylinder two (716) through air pipe one (710) and air pipe two (711) respectively. Several fixing plates three (713) are fixedly connected at equal intervals on the side end face of the mounting plate (712). A sleeve two (715) is fixedly connected to one of the fixing plates three (713), and a balance component (714) is fixedly connected to the other fixing plates three (713). The sleeve two (715) includes a sleeve two body (7151). An inner cavity channel (7152) is provided through the main body (7151). The cylinder telescopic rod (717) is set on one side of the inner cavity channel (7152). The other side of the inner cavity channel (7152) of the sleeve two (715) is fitted with a telescopic rod two (718). The telescopic rod two (718) is fixedly connected to the cylinder telescopic rod (717). A counterweight block (719) is fixedly connected to the telescopic rod two (718). Several outer shell connecting rods (78) are fixedly connected at equal intervals on the side end face of the rotating plate (77). The outer shell one (722) is fixedly connected to the side of the outer shell connecting rod (78) near the motor one (71). The outer shell connecting rod (78) away from the motor one (71) is fixedly connected to the outer shell one (722). One end of motor 1 (71) is fixedly connected to housing 2 (723). On the side of housing 2 (723) away from motor 1 (71), several soil breakers 1 (721) are fixedly connected. Several mounting arc plates (724) are fixedly connected at equal intervals on housing 2 (723). Several soil breakers 2 (725) are fixedly connected on mounting arc plates (724). Connecting rod 3 (72) is fixedly connected to housing of motor 1 (71). Connecting rod 4 (73) is fixedly connected to the upper end of connecting rod 3 (72). Soil breaking plate (74) is fixedly connected to the side end of connecting rod 4 (73). Connecting plate 3 (75) is fixedly connected to the upper end of connecting rod 4 (73).By adjusting the drive end of cylinder two (716), the cylinder extension rod (717) is extended. The extension of cylinder extension rod (717) pushes extension rod two (718) to extend. The extension of extension rod two (718) causes the counterweight block (719) to protrude outward, thus disrupting the center of gravity of each component on the mounting plate (712). The mounting plate (712) vibrates while rotating, thereby causing the outer shell two (723) and its earthbreaker one (721) and earthbreaker two (725) to rotate and vibrate, thus simulating the disturbance of the surrounding soil by the tunnel boring machine during operation.

2. The model simulation test device for a tunnel crossing an existing tunnel according to claim 1, characterized in that, The main body component 1 (4) includes a ring component 1 (41), a hoop (42) is fixedly connected to the upper end face of the ring component 1 (41), a circular slide rail (43) is fixedly connected to the upper end face of the hoop (42), a mounting protrusion (47) is fixedly connected to the outer end face of the hoop (42), a mechanism base plate (44) is fixedly connected to the lower end face of the ring component 1 (41), and several support legs (1) are fixedly connected at equal intervals on the outer side of the bottom surface of the mechanism base plate (44). A test window 1 (45) is symmetrically opened along the radial direction on the side end face of the ring component 1 (41), and a mounting plate 1 (46) is fixedly connected to both sides of the test window 1 (45).

3. The model simulation test device for a tunnel crossing an existing tunnel according to claim 2, characterized in that, A connecting frame (2) is provided between the mounting plate (47) and the rotating shaft three (10). The connecting frame (2) includes a connecting main plate (21). A connecting base plate (22) is fixedly connected to the lower end of the connecting main plate (21). The connecting base plate (22) is fixedly connected to the mounting plate (47). A connecting top plate (23) is fixedly connected to the upper end of the connecting main plate (21). A bearing (12) is embedded through the connecting top plate (23). The bearing (12) is sleeved on the rotating shaft three (10). The outer ring of the bearing (12) is fixedly connected to the connecting top plate (23). The inner ring of the bearing (12) is fixedly connected to the rotating shaft three (10). A protective cover (3) is fixedly connected to the connecting top plate (23) through a connecting support plate (13). The protective cover (3) is located outside the gear (11).

4. The model simulation test device for a tunnel crossing an existing tunnel according to claim 3, characterized in that, The guide assembly (66) includes a guide ring (661), a connecting rod (662) is fixedly connected to the inner end face of the guide ring (661), a sliding ring (663) is fixedly connected to the lower end of the connecting rod (662), the connecting rod (662) and the sliding ring (663) are slidably disposed in the guide groove (65), a fixing rod (664) is fixedly connected to the side end face of the connecting rod (662), an elastic connector (665) and an elastic connector (667) are fixedly connected to both sides of the guide ring (661), and an elastic connector (666) is fixedly connected to the upper outer end of the guide ring (661).

5. The model simulation test device for a tunnel crossing an existing tunnel according to claim 4, characterized in that, A connecting telescopic component 1 (668) is fixedly connected to the side of the elastic connector 1 (665) away from the guide ring (661). A connecting sleeve 1 (669) is fitted onto the connecting telescopic component 1 (668). A connecting sleeve 2 (6611) is fixedly connected to the side of the elastic connector 3 (667) away from the guide ring (661). The connecting sleeve 1 (669) and the connecting sleeve 2 (6611) are fixedly connected by a connecting plate 1 (6610). A connecting telescopic component 2 (6612) is fitted onto the connecting sleeve 2 (6611). A connecting sleeve 3 (6613) is fixedly connected to the connecting telescopic component 2 (6612). A connecting telescopic component three (6614) is provided, and the connecting telescopic component three (6614) is fixedly connected to the end of the elastic connector two (666) away from the guide ring (661). A converter plate (6616) is fixedly connected to the bottom surface of the connecting sleeve one (669). A connecting telescopic component four (6617) is fixedly connected to the lower end of the converter plate (6616). A connecting sleeve four (6618) is provided on the connecting telescopic component four (6617). A connecting rod two (6619) is fixedly connected to the bottom surface of the connecting sleeve four (6618). A connecting plate two (6620) is fixedly connected to the lower end of the connecting rod two (6619). The connecting plate two (6620) is fixedly connected to the connecting plate three (75).

6. The model simulation test device for a tunnel crossing an existing tunnel according to claim 4, characterized in that, The elastic connector 1 (665) includes a fixed end 1 (6651), one end of which is fixedly connected to the connecting telescopic member 1 (668), and the other side of the fixed end 1 (6651) is fixedly connected to a sleeve 1 (6653). A telescopic rod 3 (6656) is sleeved on the sleeve 1 (6653). A fixed end 2 (6657) is fixedly connected to the side of the telescopic rod 3 (6656) away from the sleeve 1 (6653). The fixed end 2 (6657) is fixedly connected to the guide ring (661). A compression sleeve (6652) and a spring (6655) are sleeved on the outside of the sleeve 1 (6653). One end of the spring (6655) is fixedly connected to the compression sleeve (6652), and the other end of the spring (6655) is fixedly connected to the fixed end 2 (6657). A fastening bolt 1 (6654) is threadedly connected to the compression sleeve (6652) through a threaded hole.

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