Urban underground engineering simulation experiment platform

Abstract

The utility model relates to the technical field of civil engineering, in particular to an urban underground engineering simulation experiment platform which comprises a model tank main body, a sanding device, a seepage simulation device, a tunneling device and an excavating device, and a soil box filled with sandy soil is arranged in the model tank main body; the tunneling device comprises a frame, a moving mechanism and a punching mechanism, the moving mechanism is arranged on the frame, the punching mechanism is arranged on the moving mechanism, the position of the punching mechanism is controlled through the moving mechanism, a plurality of tunneling holes corresponding to the punching mechanism are formed in the model tank body, and the tunneling holes are communicated with the punching mechanism. A simulation tunnel pipeline capable of selecting multiple positions is arranged at the center line of the soil box, the tunneling device is arranged to be matched with the soil box in the model groove body to simulate the conditions such as leakage and pressure change occurring in the tunnel excavation process of urban underground engineering, and therefore a construction scheme is adjusted according to the simulation conditions, and the construction scheme is made to be more practical.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a simulation experiment platform for urban underground engineering. Background Art

[0002] In the field of urban underground engineering, due to the complexity of geological conditions and the particularity of the construction environment, underground engineering construction often faces many challenges, such as: the geological environment in which underground engineering is located is diverse, including soft soil, hard rock, mudstone, etc. Different geological conditions put forward higher requirements on construction technology and construction methods; groundwater leakage is one of the common problems in underground engineering, and the height of the groundwater level will affect the construction process and project quality, and corresponding waterproofing measures need to be taken; the urban underground space is limited, and the construction of underground engineering needs to fully consider the utilization and planning of underground space to avoid damage to the underground environment; in the face of these challenges, underground engineering construction units need to have rich experience and professional knowledge, and adopt scientific and reasonable construction plans to ensure the smooth progress of underground engineering construction and the guarantee of project quality.

[0003] In order to increase the feasibility of the construction plan, a simulation experiment evaluation system is usually set up for simulation testing, and the construction plan is referenced to optimize the construction plan. For example, Chinese patent announcement number CN108399313A discloses "a simulation evaluation system and method for underground engineering damage", which collects and transmits the surface elevation data of existing underground engineering facilities, the strength and location data of engineering structures, and the internal geometric size data of the engineering, and then analyzes and integrates the collected data to construct engineering model parameters; simulates and calculates engineering damage effect data based on engineering parameters and engineering effect calculation models, and then evaluates the survival probability of the engineering; visualizes the evaluation results to achieve rapid evaluation of engineering facility damage;

[0004] However, in actual use, it is impossible to fully simulate the complex underground engineering construction process. For example, leakage and pressure changes that occur during tunnel excavation are difficult to simulate, resulting in discrepancies between the simulated data and the actual data. Decision makers do not have a comprehensive understanding of the overall situation of underground engineering, and plans made based on simulation data have errors in actual construction. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art, such as the inability to fully simulate the complex underground engineering construction process, the inconsistency between the simulated data and the actual data, and the insufficient understanding of the decision-makers on the overall situation of the underground engineering, and to propose an urban underground engineering simulation experiment platform.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A simulation experiment platform for urban underground engineering is designed, comprising a model trough body, a sand spreading device, a seepage simulation device, a tunneling device and an excavation device, wherein the seepage simulation device is arranged in the model trough body, the sand spreading device is arranged above the model trough body, the tunneling device and the excavation device are arranged on one side of the model trough body, and a soil box filled with sand and soil is arranged in the model trough body;

[0008] The excavation device includes a frame, a moving mechanism and a punching mechanism, the moving mechanism is arranged on the frame, the punching mechanism is arranged on the moving mechanism, and the position of the punching mechanism is controlled by the moving mechanism, the model slot body is provided with multiple position selections and excavation holes corresponding to all the multiple excavation holes corresponding to the punching mechanisms, and the center line of the soil box is equipped with a simulated tunnel pipeline corresponding to the multiple excavation holes.

[0009] Furthermore, the moving mechanism includes a first electric screw disposed in the frame and a lifting plate matched with the frame, and the lifting plate is threadedly connected to the first electric screw.

[0010] Furthermore, a second electric screw is provided on the lifting plate, a moving platform is threadedly connected to the second electric screw, the moving platform is slidably connected to the lifting plate, and the punching mechanism is provided on the moving platform.

[0011] Furthermore, the drilling mechanism includes a cutter disc and a rotary tunneling system, the cutter disc is fixedly arranged on the output shaft of the rotary tunneling system, and the cutter disc is a soil-water balance shield structure.

[0012] Furthermore, the seepage simulation device is arranged in the model trench body, and the seepage simulation device includes at least two water tanks and soil boxes, and the two water tanks and soil boxes are symmetrically arranged inside the model trench body along the central axis of the excavation hole.

[0013] Furthermore, the sand spreading device includes a sand spreading frame and a moving device, and a sand spreading bucket is provided at the lower end of the moving device.

[0014] Furthermore, a side excavation device is provided on one side of the model trough body, which includes: a bracket, a bucket, a propulsion system and a height adjustment system, and the bucket is rotatably connected to the propulsion system.

[0015] The utility model proposes an urban underground engineering simulation experiment platform, which has the following beneficial effects:

[0016] In the utility model, by setting up a tunneling device to cooperate with the soil box in the main body of the model trench, leakage and pressure changes that occur during the tunnel excavation process of the urban underground project are simulated, so that the construction plan is adjusted according to the simulated situation, which is more in line with reality. The excavation device can be used to simulate foundation pit excavation construction;

[0017] Secondly, in the utility model, the height of the punching mechanism is adjusted by the cooperation of the first electric screw and the lifting plate, and the position of the punching mechanism is controlled by the cooperation of the second electric screw and the moving platform, so that the position of the punching mechanism in drilling holes in the model groove body can be adjusted to simulate leakage at different depths and pressure changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an urban underground engineering simulation experiment platform proposed by the utility model;

[0019] Figure 2 It is a structural schematic diagram of the punching mechanism of the utility model;

[0020] Figure 3 This is a structural schematic diagram of the lifting plate of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the cutter disc of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the bucket of the utility model.

[0023] In the figure: 1. Model trench body; 11. Soil box; 12. Excavation hole; 2. Sand spreading device; 21. Sand spreading frame; 22. Moving device; 23. Sand spreading bucket; 3. Seepage simulation device; 31. Water tank; 4. Excavation device; 41. Frame; 42. Moving mechanism; 421. First electric screw rod; 422. Lifting plate; 423. Second electric screw rod; 424. Moving platform; 43. Punching mechanism; 431. Cutter head; 432. Rotary excavation system; 5. Side excavation device; 51. Bracket; 52. Bucket; 53. Propulsion system; 54. Height adjustment system. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-5, an urban underground engineering simulation experiment platform, comprising a model trench body 1, a sand spreading device 2, a seepage simulation device 3, a tunneling device 4 and an excavation device 5, wherein the seepage simulation device 3 is arranged in the model trench body 1, the excavation device 4 is arranged on one side of the model trench body 1, the sand spreading device 2 is arranged above the model trench body 1, the tunneling device 4 and the excavation device 5 are arranged on one side of the model trench body 1, and a soil box 11 filled with sand and soil is arranged in the model trench body 1;

[0026] The excavation device 4 includes a frame 41, a moving mechanism 42 and a punching mechanism 43. The moving mechanism 42 is arranged on the frame 41, and the punching mechanism 43 is arranged on the moving mechanism 42. The position of the punching mechanism 43 is controlled by the moving mechanism 42. The model tank body 1 is provided with a plurality of excavation holes 12 corresponding to the punching mechanism 43. The center line of the soil box 11 is equipped with a plurality of positions that can be selected and correspond to the excavation holes 12.

[0027] In the present invention, the excavation device 4 cooperates with the soil box 11 in the model slot body 1 to simulate the leakage and pressure changes that occur during the tunnel excavation process of the urban underground engineering, so as to adjust the construction plan according to the simulation situation, and the height and horizontal position of the punching mechanism 43 are controlled by the moving mechanism 42 to adjust the position of the punching mechanism 43 for drilling and excavating the model slot body 1 to simulate the leakage and pressure changes at different depths. The length, width and depth (W, H, D) of the model slot body 1 are not less than 2600, 1500, and 1500 (mm), the main frame is made of carbon steel, and the front and rear of the soil box are made of The rectangular structure is made of a whole piece of high-strength fiberglass, and both sides in contact with the seepage simulation device 3 are made of thickened 304 stainless steel. The length, width and depth (W, H, D) of the soil box 11 are not less than 2200, 1500, and 1500 (mm). The movable baffle inside can turn the soil box 11 into two boxes with a width of not less than 0.5m and 1m. In some embodiments, the experimental platform is also equipped with micro sensors and data acquisition and processing modules: including at least 32 integrated micro pore pressure sensors, 32 soil pressure sensors, 20 laser displacement sensors, and also includes multi-channel data acquisition and analysis systems and other systems.

[0028] Among them, the soil pressure sensor has a range of -100-100kPa, an accuracy of 0.15%, an overload pressure of 150%FS, a breaking pressure of 200%FS, and a maximum tolerance of 100g centrifugal force;

[0029] Laser displacement sensor: The measuring range is not less than 70mm, the accuracy is not less than 70um, with power adapter and joint welding; it also has an electric motion adjustment platform, can perform mobile scanning measurement, and is equipped with a corresponding independent collector;

[0030] Multi-channel data acquisition and analysis system: instrument interface: Ethernet; strain gauge sensitivity coefficient: 1.0-3.0 automatic correction; the number of measurement points of a single acquisition box is not less than 72; long wire resistance correction range: 0.0-100Ω; static maximum sampling rate 5Hz / channel, close some measurement channels, maximum dynamic sampling rate 200Hz / channel, support full bridge, half bridge, three-wire 1 / 4 bridge and common compensation 1 / 4 bridge, 100Mbps Ethernet interface, WiFi wireless communication interface, supporting data acquisition program;

[0031] The control terminal includes an aluminum alloy control cabinet, a weak current box, a hydraulic control device and a control terminal, and the configuration is not less than: 13th generation i5-13400 8G 256GSSD+1TB, 23-inch display;

[0032] The Geo-P IV data acquisition system mainly includes an ultra-high precision acquisition host, an ultra-small volume acquisition host, a mobile data processing unit, a sheet laser, a lens, and a supporting system control program. The ultra-high precision acquisition host is not less than 1 set, the pixel is not less than 45.75 million effective pixels, including a 5-axis anti-shake device, the number of frames per second is not less than 10 frames / second, and the ultra-small volume acquisition host is not less than 3 sets: the pixel is not less than 20 million effective pixels, the pixel size is not greater than: 2.4μm×2.4μm, USB3.0 high-speed interface; lens interface: C port, frame rate is not less than 18 frames, exposure time 12μs-1s, 3m U3 line, sheet laser output power: ≥3W, sheet light thickness: <1mm, light output angle: 10-25 degrees; can emit laser, wavelength not less than 532±1nm, heat dissipation method: air cooling, green sheet light source laser can produce sheet light source, that is, form a light-emitting surface, the number of lenses is not less than 4: ultra-high precision acquisition host is equipped with 1 universal lens; focal length 50mm, universal C-mount, quantity 3.

[0033] Furthermore, in this embodiment, the moving mechanism 42 includes a first electric screw 421 arranged in the frame 41 and a lifting plate 422 cooperating with the frame 41. The lifting plate 422 is provided with a screw hole and is threadedly connected to the first electric screw 421. The motor in the first electric screw 421 adopts servo control, which is more precise. The first electric screw 421 can be replaced by a driving structure such as a hydraulic cylinder or a pneumatic cylinder. The output torque of the first electric screw 421 is not less than 500Nm and the maximum rotation speed is 15r / min.

[0034] Furthermore, in the present embodiment, a second electric screw 423 is provided on the lifting plate 422, and a moving platform 424 is threadedly connected to the second electric screw 423. When the screw in the second electric screw 423 rotates, the moving platform 424 is driven to move. The moving platform 424 is slidingly connected to the lifting plate 422, and the punching mechanism 43 is provided on the moving platform 424, and is driven to move by the moving platform 424, and contacts with the model slot body 1 to perform drilling and excavation. The second electric screw 423 is driven by a motor, and provides thrust when the punching mechanism 43 is working. The propulsion speed can be adjusted in coordination with the rotation speed. The maximum propulsion force is not less than 6T, and the maximum propulsion speed is not less than 100mm / min.

[0035] It should be noted that, in this embodiment, the drilling mechanism 43 includes a cutter head 431 and a rotary tunneling system 432. The cutter head 431 is fixedly arranged on the output shaft of the rotary tunneling system 432. The cutter head 431 is a soil-water balance shield structure. The rotary tunneling system 432 is provided with a sewage discharge system, which is driven by a motor and discharges sewage through a blade dragon. The drilling stroke of the drilling mechanism 43 is not less than 1500mm and the adjustment range is 0mm-1500mm. The main frame is made of carbon steel and some support plates are made of aluminum alloy. The maximum outer diameter of the drilling of the cutter head 431 is adjustable.

[0036] In addition, in some embodiments, the seepage simulation device 3 is arranged in the model trench body 1, and the seepage simulation device 3 includes at least two water tanks 31 and a soil box 11. The two water tanks 31 and the soil box 11 are symmetrically arranged inside the model trench body 1 along the central axis of the excavation hole 12. The length, width and depth (W, H, D) of the water tank 31 are not less than 1500, 200, and 1500 (mm). The water tank 31 is equipped with a fixed-position faucet and a motor-adjustable faucet (dual-controlled by a computer and a button at the water tank). The water tanks on both sides can also be divided by baffles to form independent test units for simulating the seepage state of groundwater in different aquifers. The water tank 31 is provided with a pressure pump and a pressure monitoring unit to realize measurable and controllable pressure.

[0037] The sand spreading device 2 includes a sand spreading frame 21 and a mobile device 22. A sand spreading hopper 23 is arranged at the lower end of the mobile device 22. The length, width and depth (W, H, D) of the sand spreading hopper 23 are not less than 1400, 500 and 400 (mm). Two layers of sieves with different apertures are installed inside the sand spreading hopper 23. At the same time, the sand spreading mouth can be adjusted according to the sand spreading speed requirements. The mobile device 22 moves back and forth using a servo motor and a high-precision slide rail, and moves the sand spreading hopper 23 up and down using a winch and a linear bearing. It can be controlled by a computer and can be operated automatically to spread sand with one button. The entire sand spreading device is a rigid structure, which can avoid shaking of the sand box during rapid sand spreading, reduce the sand spreading time, and speed up the experimental process.

[0038] A side excavation device 5 is also provided on one side of the model trough body 1, which includes: a bracket 51, a bucket 52, a propulsion system 53 and a height adjustment system 54. The bucket 52 is rotatably connected to the propulsion system 53. The bucket is generally manually flipped over to unload to an open space. If necessary, it can be electrically controlled. When electrically controlled, it can cooperate with the propulsion system 53 to control the bucket 52 to automatically dig and unload sand. The propulsion system 53 is driven by a motor and provides thrust when the rotating system is working. The propulsion speed can be adjusted in coordination with the rotation speed. The maximum propulsion force is 6T and the maximum propulsion speed is not less than 100mm / min.

[0039] Working mode: When working, the water tank 31 cooperates with the soil box 11 to control the inflow of water into the water tank. A pressure pump and a pressure monitoring unit are provided on the water tank 31 to achieve measurable and controllable pressure. A simulated tunnel pipeline with multiple positions selectable is provided at the center line of the soil box to simulate pipeline leakage and excavation operations (construction disturbance). The excavation operation is to achieve simulated operations of excavation, soil discharge and lining. A complete pipe with a top opening is inserted into the soil box 11 to simulate tunnel leakage. A micro pore pressure sensor is installed on the pipe wall to monitor the local pressure of the pipe wall.

[0040] In the simulated operations of tunnel excavation, soil discharge and lining, the lining is simulated by a complete pipeline, that is, the punching mechanism 43 cooperates with the simulated tunnel pipeline to simulate tunnel excavation. The device adjusts the height of the punching mechanism 43 through the first electric screw 421 and cooperates with the frame 41 to excavate the heading holes 12 at different positions, which can simulate tunnel excavation at different depths. During excavation, the screw in the second electric screw 423 rotates, driving the moving platform 424 to move, and then driving the punching mechanism 43 to move. When the punching mechanism 43 is working, it provides thrust, and the propulsion speed can be adjusted in coordination with the rotation speed.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An urban underground engineering simulation experimental platform, comprising a model trough body (1), a sand spreading device (2), a seepage simulation device (3), a tunneling device (4) and an excavation device (5), characterized in that: The seepage simulation device (3) is arranged in the model trough body (1), the sand spreading device (2) is arranged above the model trough body (1), the excavation device (4) and the digging device (5) are arranged on one side of the model trough body (1), and a soil box (11) filled with sand is arranged in the model trough body (1); The excavation device (4) comprises a frame (41), a moving mechanism (42) and a punching mechanism (43); the moving mechanism (42) is arranged on the frame (41); the punching mechanism (43) is arranged on the moving mechanism (42); and the position of the punching mechanism (43) is controlled by the moving mechanism (42); a plurality of excavation holes (12) corresponding to the punching mechanism (43) are arranged on the model trough body (1); and a simulated tunnel pipeline corresponding to the excavation holes (12) is provided at the center line of the soil box (11) and can be selected in a plurality of positions.

2. The urban underground engineering simulation experimental platform according to claim 1 is characterized by: The moving mechanism (42) comprises a first electric screw (421) arranged in the frame (41) and a lifting plate (422) matched with the frame (41), and the lifting plate (422) is threadedly connected to the first electric screw (421).

3. The urban underground engineering simulation experimental platform according to claim 2 is characterized by: A second electric screw (423) is arranged on the lifting plate (422), a movable platform (424) is threadedly connected to the second electric screw (423), the movable platform (424) is slidably connected to the lifting plate (422), and the punching mechanism (43) is arranged on the movable platform (424).

4. The urban underground engineering simulation experimental platform according to claim 1, characterized in that: The punching mechanism (43) comprises a cutterhead (431) and a rotary excavation system (432); the cutterhead (431) is fixedly arranged on an output shaft of the rotary excavation system (432); and the cutterhead (431) is a soil-water balance shield structure.

5. The urban underground engineering simulation experimental platform according to claim 1 is characterized by: The seepage simulation device (3) is arranged in the model trench body (1), and the seepage simulation device (3) comprises two water tanks (31) and a soil box (11), and the two water tanks (31) and the soil box (11) are symmetrically arranged inside the model trench body (1) along the central axis of the excavation hole (12).

6. The urban underground engineering simulation experimental platform according to claim 1, characterized in that: The sand spreading device (2) comprises a sand spreading frame (21) and a moving device (22), and a sand spreading bucket (23) is arranged at the lower end of the moving device (22).

7. The urban underground engineering simulation experimental platform according to claim 1 is characterized by: A side excavation device (5) is also provided on one side of the model tank body (1), which comprises: a bracket (51), a bucket (52), a propulsion system (53) and a height adjustment system (54), and the bucket (52) is rotatably connected to the propulsion system (53).

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