WO2018195919A1 - 智能数控超高压真三维非均匀加卸载与稳压模型试验*** - Google Patents
智能数控超高压真三维非均匀加卸载与稳压模型试验*** Download PDFInfo
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Definitions
- the invention relates to an intelligent numerical control ultra-high pressure true three-dimensional non-uniform loading and unloading and voltage regulation model test system used in deep underground cavern engineering fields such as hydropower, transportation, energy, mine and national defense.
- the geomechanical model test is a physical simulation method that uses the scale geological model to study the engineering construction and deformation failure process according to the similarity principle.
- the geomechanical model test can supplement and verify the numerical simulation. It can accurately simulate the nonlinear deformation and failure process of underground cavern excavation and the overall safety of the cave group system. It is necessary to discover new phenomena, reveal new mechanisms, explore new laws and verify new ones. Theory has an irreplaceable important role. To carry out underground engineering model tests, it is necessary to have a geomechanical model test system. The current research status of the geomechanical model test system is as follows:
- the loading system is mainly composed of high-pressure airbags, thrust plates, limit jacks and air compressors.
- the loading system cannot achieve high ground. Stress true three-dimensional non-uniform loading and unloading.
- the model test system is mainly based on plane, quasi-three-dimensional, small size and uniform loading, and it is impossible to implement the true three-dimensional non-uniform loading and unloading process;
- the model test system has a small loading value and cannot simulate the high stress distribution state of the deep rock mass by ultra-high pressure loading
- the model test system cannot automatically capture the displacement of any part of the model.
- the invention overcomes the above-mentioned deficiencies of the prior art, and provides a digital servo control, large load value, high loading precision, good voltage regulation performance, large device size and adjustable, and can simulate ultra-high pressure non-uniform loading, unloading and stabilization.
- the intelligent numerical control ultra-high pressure true three-dimensional non-uniform loading and unloading and voltage regulation model test system for the pressure process and direct observation of the deformation and failure process of the tunnel excavation.
- An intelligent numerical control ultra-high voltage true three-dimensional non-uniform loading and unloading and voltage regulation model test system including combined gantry reaction device, ultra-high pressure true three-dimensional non-uniform loading and unloading device, intelligent hydraulic loading and unloading and voltage regulation numerical control system, model displacement Automatic test system and HD multi-probe peek system;
- the combined gantry reaction device is assembled by a detachable box-shaped member, and the device is sized to accommodate a test model and is used as a test-loaded reaction device, the ultra-high pressure true three-dimensional non-uniform
- the loading and unloading device is disposed in the combined gantry reaction device to perform ultra-high pressure true three-dimensional loading and unloading on the test model, and the intelligent hydraulic loading and unloading and voltage-stabilizing numerical control system passes the high-pressure oil pipe and the ultra-high pressure true three-dimensional non-uniform loading and unloading device Connecting; performing ultra-high voltage true three-dimensional gradient non-uniform loading and unloading and voltage stabilization control by the ultra-high pressure true three-dimensional non-uniform loading and unloading device of the intelligent hydraulic loading and unloading and voltage regulating numerical control system input command digital servo control;
- the model displacement automatic test system automatically collects the displacement of any part of the model; the HD multi-probe peek system dynamically observes the deformation and destruction
- the combined gantry reaction device is a combination of detachable box members, including a box bottom beam, a box top beam, a box left column, a box right column, and a box front
- the force wall member and the box type rear reaction wall member; the box bottom beam and the box top beam are arranged up and down, and are connected by the box left and right columns to form a rectangular frame structure, and the front and rear of the rectangular frame are provided with a box type
- the front reaction wall member and the box type rear reaction wall member, the entire combined frame reaction device is combined by a connecting device.
- a transparent excavation window is arranged in the middle of the box front reaction wall, and the transparent excavation window is mainly composed of a high-strength steel skeleton and a tempered glass panel, and a tunnel excavation is arranged in the center of the tempered glass panel. window.
- the ultra-high pressure true three-dimensional non-uniform loading and unloading device comprises a plurality of loading units, respectively
- the active three-dimensional loading is carried out on the upper, lower, left, right and rear faces of the combined gantry reaction device, and the front side of the model adopts the passive loading method of displacement constraint.
- loading units which are divided into 8 groups, wherein 6 loading units arranged at the top of the model are the first group, and 6 loading units set at the bottom of the model are the second group, and the left and right sides of the model are respectively set.
- the six loading units are divided into three groups from top to bottom, each group containing four loading units; nine loading units are set behind the model, and are divided into three groups from top to bottom, each group containing three loading units.
- the eight groups of loading units are independently and synchronously super-high-pressure gradient non-uniformly loaded and unloaded by eight hydraulic passages controlled by intelligent hydraulic loading and unloading and voltage-stabilized numerical control system.
- each loading unit comprises a hydraulic jack and a table-shaped force-loading module; the bottom of the table-shaped force-loading module is attached to the loading plate of the model surface, and the top of the table-shaped force-loading module adopts a connecting device and a hydraulic jack front end. Connected, the rear end of the hydraulic jack is connected to the inner wall of the combined gantry reaction device through a connecting device; the load of the hydraulic jack can be uniformly applied to the test model body by using the table-shaped force-loading module and the combined gantry reaction device. .
- a loading guide frame device is arranged outside the test model body, and the guide frame device is welded by a stainless steel square tube; before loading, the model loading steel plate is closely attached to the surface of the test model and embedded in the guide frame device to a certain depth.
- the intelligent hydraulic loading, unloading and voltage regulating numerical control system is mainly composed of a visual human-computer interaction system, a PLC hydraulic numerical control system and an ultra-high pressure execution system; the visual human-computer interaction system and the PLC hydraulic numerical control system perform information transmission
- the PLC hydraulic numerical control system and the ultra-high pressure execution system are described for information transmission.
- the visual human-computer interaction system comprises a human-machine interface HMI, a PC monitoring system and a software system
- the PLC hydraulic numerical control system comprises a central control unit, a pressure output unit and a pressure detecting unit, and the ultra-high voltage execution
- the system includes a hydraulic oil circuit system and a hydraulic jack
- the software system is installed on the human-machine interface HMI and the PC monitoring system, and the PC monitoring system is between the central control unit and the human-machine interface HMI.
- the human-machine interface HMI and the central control unit also perform information transmission, the central control unit controls the pressure output unit, the pressure output unit controls the hydraulic oil circuit system, and the hydraulic oil circuit system controls the hydraulic jack;
- the pressure detecting unit detects the pressure information of the hydraulic jack and feeds back to the central control unit, and the central control unit synchronously transmits the detected pressure information to the human-machine interface HMI or PC monitoring system, and in the human-machine interface HMI or PC monitoring system. Display Show.
- the hydraulic oil circuit system includes a stepping motor, an oil pump, a stepping relief valve, an O-type three-position four-way electromagnetic reversing valve, a electromagnetic ball valve pressure maintaining valve and a synchronous valve; and a stepping relief valve for adjusting the oil path Pressure, O-type three-position four-way electromagnetic reversing valve is used to control the flow direction of the oil circuit, electromagnetic ball valve pressure maintaining valve is used for holding pressure, and synchronous valve is used for synchronous loading.
- the stepping motor starts the oil pump, pumps the hydraulic oil into the oil path, and then enters the stepping relief valve, and the PLC hydraulic numerical control system controls the stepping motor to adjust the stepping relief valve according to the pressure feedback information detected by the pressure detecting unit in real time.
- the valve core advances or retreats to reduce or increase the oil pressure, thereby completing the loading and unloading process; when the pressure of the hydraulic oil circuit system changes, the PLC hydraulic numerical control system will servo-control the stepping relief valve for supercharging. Or step down, realize instantaneous pressure compensation, and maintain the voltage regulation state through the electromagnetic ball valve pressure maintaining valve.
- the starting pressure of the hydraulic oil circuit system can be reduced to 0 MPa, and the pressure zero start can be realized.
- the operator inputs the loading and unloading load value through the human-machine interface HMI or PC monitoring system of the human-computer interaction system, and the visual human-computer interaction system reaches the PLC hydraulic numerical control system under the loading and unloading command;
- the PLC hydraulic numerical control system converts the digital pressure signal into an electric signal and transmits it to the ultra-high pressure execution system.
- the ultra-high pressure execution system receives the electric signal, and controls the stepping motor to adjust the spool of the stepping relief valve to advance or retreat to realize the oil pressure. Reduce or increase to complete the loading and unloading process.
- the loading pressure can be reduced to 0 MPa, and the pressure zero start can be realized.
- the pressure detecting unit dynamically detects the pressure change of the hydraulic jack in real time, and feeds the pressure change information to the central control unit of the PLC hydraulic numerical control system in time, and the central control unit synchronously transmits the processed digital pressure information to the human-machine interface HMI or PC monitoring system. And displayed on the HMI or PC monitoring system.
- the history of oil pressure changes is automatically stored by the human-computer interaction system.
- the model displacement automatic test system is mainly composed of a displacement transmission device, a displacement measuring device, a signal conversion device, a data processing device and a computer system; the displacement transmission device detects the displacement of the test model and passes the displacement measuring device The displacement information is transmitted to a signal conversion device that performs information transmission with the data processing device, and the data processing device performs information transmission with the computer.
- the displacement transmitting device transmits the displacement of the model measuring point to the displacement measuring device through the flexible measuring rod
- the displacement measuring device converts the displacement of the model measuring point into the Moiré fringe displacement through the grating scale sensor
- signal conversion The device converts the moire fringe displacement into an electrical pulse signal through its photoelectric conversion element and transmits it to the data processing device
- the data processing device receives the electrical pulse signal and the electrical pulse signal It is converted into a digital signal to calculate the displacement of the model, and stored and displayed in real time on the computer interface.
- the model displacement time history curve is automatically generated for the tester to dynamically observe and monitor the displacement of the model, and realize the digitization and visualization of the automatic displacement measurement of the model. And intelligent.
- the high-definition multi-probe peek system is mainly composed of a miniature high-definition probe, a high-speed camera control panel, a data storage box and a liquid crystal display; the plurality of miniature high-definition probes are arranged, and a plurality of miniature high-definition probes are arranged in the model cavity. Any part outside; the collected video is displayed on the one hand in real time on the self-contained LCD display, and on the other hand is automatically stored in the data memory.
- the invention Compared with the same type of model test system at home and abroad, the invention has the following significant technical advantages:
- the invention has a large load value (system rated output 63 MPa, maximum load 45 000 kN), can carry out ultra-high pressure true three-dimensional non-uniform loading and unloading and voltage regulation control, and can finely simulate the high ground of deep rock mass above 5,000 meters deep
- the non-uniform distribution of stress and the nonlinear deformation and failure process of deep cavern excavation solve the technical problems of low-pressure and uniform loading of the existing geomechanical model test system.
- the present invention has high loading accuracy (1.5 ⁇ F.S.) and a long voltage stabilization time (more than 300 days).
- the pressure zero start is realized; through the intelligent hydraulic loading and unloading and voltage regulation numerical control system, any loading and unloading cycle model test can be carried out, which solves the problem that the existing geomechanical model test system has low loading precision and stability.
- the pressing time is short, the pressure cannot be started at zero, and the technical problem of the loading and unloading cycle test cannot be performed.
- the invention has wide loading range and high degree of automation of loading and unloading, and can perform arbitrary loading and unloading of 63 MPa or less, which can simulate the cavern damage under the ultra-deep buried high ground stress environment, and can also simulate the shallow buried low ground stress environment. The cavern is destroyed.
- the frame reaction device of the invention adopts a modular combined structure, the test device is large in scale and adjustable in size, and the size of the reaction device can be arbitrarily adjusted according to the model test range to meet the requirements of model tests of different scales, and the present solution is solved. There is a technical problem that the size of the reaction device of the geomechanical model system is not adjustable.
- the displacement test of the model of the invention can automatically test the displacement of any part inside the model through the flexible transmission technology and the photoelectric conversion technology, and the displacement measurement accuracy is 0.001 mm, and the test performance is stable, and is free from external electromagnetic field interference, etc. There are technical problems in geomechanical model tests that cannot effectively test the displacement of any part of the model.
- the detachable transparent excavation window and the high-definition multi-probe peeping system with variable shape and size can dynamically observe the deformation and destruction process of the excavation in real time.
- Figure 1 is a plan view showing the overall structure of the present invention
- FIG. 2 is a three-dimensional design diagram of a combined gantry reaction device of the present invention.
- Figure 3 is a front plan view of the combined gantry reaction device of the present invention.
- Figure 4 is a side plan view of the combined gantry reaction device of the present invention.
- Figure 5 is a top plan view of the combined gantry reaction device of the present invention.
- Figure 6 is a three-dimensional design diagram of the internal reaction device of the combined gantry according to the present invention.
- Figure 7 is a three-dimensional design diagram of the ultra-high pressure true three-dimensional non-uniform loading and unloading device of the present invention.
- Figure 8 is a plan view showing the force transmission unit of the present invention.
- Figure 9 is a plan view showing the excavation window of the present invention.
- Figure 10 is a circuit diagram of the system oil circuit of the present invention.
- Figure 11 is a circuit diagram of the system of the present invention.
- Figure 12 is a flow chart of the pressurization control of the present invention.
- Figure 13 is a flow chart showing the operation of the model displacement automatic test system of the present invention.
- Figure 14 is a schematic diagram of photoelectric conversion of the model displacement automatic test system of the present invention.
- Figure 15 is a connection diagram of a displacement transmitting device and a displacement measuring device of the present invention.
- Figure 16 is a panoramic photograph of a collapse test model for the formation of an ancient cave in a deep-buried carbonate reservoir
- Figure 17 is a close-up photograph of the collapse of the ancient cave in the deep-buried carbonate reservoir
- Figure 18 is a distribution diagram of the displacement of the model after the collapse of the ancient cave
- Fig. 19 is a radial stress distribution diagram of the model after the collapse of the ancient cave.
- Displacement measuring point 51 .PVC casing, 52. Flexible thin steel wire rope, 53. Anti-friction positioning plate, 54. Grating sensor, 55. Displacement transmission pulley, 56. Self-balancing hammer, 57. Displacement test reference frame, 58. Cavitation forming collapse collapse mode.
- the "ultra-high pressure" as used in the present invention means that the loading pressure of the system can reach 63 MPa.
- the intelligent numerical control ultra-high pressure true three-dimensional non-uniform loading and unloading and voltage regulation model test system includes a combined gantry reaction device 1, an ultra-high pressure true three-dimensional non-uniform loading and unloading device 2, intelligent hydraulic loading and unloading and voltage regulation CNC system 3, model displacement automatic test system 4 and high-definition multi-probe peek system 5.
- the ultra-high pressure true three-dimensional non-uniform loading and unloading device 2 is disposed in the combined gantry reaction device 1, and the intelligent hydraulic loading and unloading and regulating numerical control system 3 is connected to the ultra-high pressure true three-dimensional non-uniform loading and unloading device 2 through the high pressure oil pipe 15.
- the whole model test system performs ultra-high voltage true three-dimensional gradient non-uniform loading, unloading and voltage stabilization control through the intelligent hydraulic loading and unloading and voltage-stabilizing numerical control system 3 input loading and unloading command digital servo control true three-dimensional loading device 2.
- the displacement of any part of the model is automatically acquired by the model displacement automatic test system 4, and the deformation and destruction condition of the model cavity 19 is dynamically observed by the high-definition multi-probe peek system 5 in real time.
- the combined gantry reaction device 1 is assembled by detachable box-like members and is adjustable in size, and is mainly used for accommodating the test model 18 and serving as a reaction loading device.
- the size of the combined gantry reaction device 1 can be arbitrarily adjusted according to the model test range, including the box top beam 6, Box bottom beam 7, box left and right column 8, box front reaction wall 9, box back reaction wall 10 and other components, each part is made of high-strength steel plate with thickness of 25mm, and passed high-strength bolts 16, steel
- the corner piece 17 and the rib 20 are connected and combined.
- the combined gantry reaction device 1 has a length of 5.05 m, a height of 4.85 m, and a thickness of 3.6 m.
- the net size of the test model 18 is 2.5 m long, 2.5 m high, and 2.0 m thick.
- the combined gantry reaction device 1 adopts a modular combined structure type, which is variable in size and can be arbitrarily adjusted according to the size of the test model 18. Overcoming most of the current model test reaction devices, the size is fixed and cannot be performed according to the model test range. Flexibility to adjust for defects.
- the ultra-high pressure true three-dimensional non-uniform loading and unloading device 2 is disposed in the combined gantry reaction device 1 and is composed of 33 independent loading units, which are respectively fixed on the combined gantry.
- the active three-dimensional loading is performed on the upper, lower, left, right and rear faces of the force device 1.
- the front of the model is a passive loading method that facilitates the excavation of the cavity by displacement constraints.
- the eight groups of loading units are independently and synchronously super-high-pressure gradient non-uniformly loaded and unloaded by eight hydraulic passages controlled by intelligent hydraulic loading and unloading and voltage-stabilizing numerical control system 3.
- each loading unit is distributed with one hydraulic jack 11 and one table-shaped force loading module 12.
- the hydraulic jack 11 has a rated output of 5000 KN, a cylinder diameter of 280 mm, and a stroke of 100 mm.
- the table-shaped force transmitting module 12 is welded by a top plate 22 (length 200 mm, width 200 mm, thickness 30 mm), a bottom plate 23 (length 500 mm, width 500 mm, thickness 30 mm) and eight pieces of force-transmitting ribs 24 having a thickness of 25 mm.
- the force-transmitting ribs 24 are evenly distributed at an angle of 45° to each other between the top plate 22 and the bottom plate 23 having a pitch of 110 mm.
- the rear end of the hydraulic jack 11 is connected to the combined gantry reaction device 1 via a flange 21, and the front end of the hydraulic jack 11 is connected to the top plate 22 of the table-shaped force-loading module 12 by high-strength bolts.
- the bottom plate 23 of the trapezoidal load-carrying module 12 abuts against the loaded steel plate 14 of the test model 18, thereby effectively transferring the output of each load cell to the surface of the test model 18.
- the combined gantry reaction device 1 can uniformly apply the load of the hydraulic jack 11 to the test model 18.
- a three-dimensional loading guide frame 13 is disposed immediately outside the test model body 18, and the three-dimensional loading guide frame 13 is provided. It is placed at the junction of the adjacent loading faces of the test model 18, and is welded by 12 stainless steel square tubes having a cross-sectional dimension of 100 mm ⁇ 100 mm.
- the model loading steel plate 14 is in close contact with the surface of the test model 18 and embedded in the three-dimensional loading guide frame 13 to a certain depth, thereby ensuring that the test models are not interfered by the adjacent loading surfaces in the respective loading directions.
- the model loading steel plate 14 is provided with test cable lead holes at predetermined positions.
- a tunnel excavation window 25 is provided in the middle of the box front reaction wall 9 of the combined gantry reaction device 1, which is reversed by the high-strength bolt and the combined gantry.
- the box front reaction wall 9 of the force device 1 is connected, and the tunnel opening window 25 is 750 mm long, 750 mm wide, and 500 mm thick.
- the tunnel excavation window 25 is mainly composed of a partition 26, a steel skeleton 27, a tempered glass panel 28, and a model cavity opening 19 cut on the tempered glass panel 28.
- the intelligent hydraulic loading and unloading and voltage regulating numerical control system 3 is composed of a PC monitoring system 29, a PLC hydraulic numerical control system 30, and an ultrahigh pressure execution system 31.
- the PC monitoring system 29 and the PLC hydraulic control system 30 are connected by a network cable 32, and the PLC hydraulic numerical control system 30 and the ultrahigh pressure execution system 31 are connected by a cable 33 to form a full closed loop control of the pressure.
- the hydraulic oil in the oil passage enters the hydraulic jack from the oil tank 34 via the oil filter 35, the oil pump 37, the step relief valve 38, the O-type three-position four-way electromagnetic reversing valve 40, the electromagnetic ball valve pressure maintaining valve 41, and the synchronizing valve 42.
- the stepping relief valve 38 is used for adjusting the oil passage pressure; the O-type three-position four-way electromagnetic reversing valve 40 is used for controlling the flow direction of the oil passage; the electromagnetic ball valve pressure maintaining valve 41 is for holding the pressure; the function of the synchronizing valve 42 is to ensure the same
- the different hydraulic jacks 11 of the road are synchronized.
- the pressure regulating process of the stepping relief valve 38 is driven by the stepping motor 36 to advance or retreat the spool of the stepping relief valve 38. When the stepping motor 36 drives the spool to advance, the oil pressure decreases, and vice versa. The pressure increases.
- the system starting pressure can be reduced to 0 MPa, and the pressure zero start can be realized.
- the PLC hydraulic numerical control system 30 can adjust the pressure change rate of the step relief valve 38 to realize the cyclic loading and unloading of the system.
- the PLC hydraulic numerical control system 30 servo-controls the stepping relief valve 38 to perform supercharging or stepping down to realize instantaneous compensation, so that the loading system maintains a steady state.
- the ultra-high pressure execution system 31 is divided into 8 oil passages which are independent and parallel with each other, and each oil passage channel individually controls a group of loading units of the ultra-high pressure true three-dimensional non-uniform loading and unloading device 2, and each oil passage is independently operated and mutually Do not interfere.
- the PLC hydraulic numerical control system 30 includes a human machine interface (HMI) 45, a programmable controller 44, a sensor system 46, an inverter oil pump drive system 47, a step relief valve drive system 48, and a solenoid valve drive system 49.
- HMI human machine interface
- the programmable controller 44 functions as a central processing unit, and converts the input loading and unloading commands into electrical signals and transmits them to the variable frequency oil pump driving system 47 and the step overflow.
- Valve drive system 48 and solenoid valve drive system 49 variable frequency oil pump drive system 47 controls oil pump 37 to pump hydraulic oil into the oil circuit, and step relief valve drive system 48 controls stepper motor 36 to push the valve of step relief valve 38
- the core advances or retreats to achieve a reduction or increase in oil passage pressure.
- the solenoid valve drive system 49 controls the opening or closing of the O-type three-position four-way electromagnetic reversing valve 40 and the electromagnetic ball valve pressure maintaining valve 41 to realize the shunting and holding of the oil passage; finally, the sensor system 46 will detect the oil passage pressure.
- the information is fed back to the programmable controller 44 in time for processing into a digital pressure signal for dynamic display in real time on the human machine interface HMI 45.
- the pressure control process of the intelligent hydraulic loading and unloading and voltage-stabilizing numerical control system is: the operator inputs the loading and unloading instructions through the human-machine interface HMI45 or the PC monitoring system 29 of the human-computer interaction system, and visualizes the human-computer interaction system.
- the loading and unloading command is converted into a digital pressure signal and transmitted to the PLC hydraulic numerical control system 30.
- the PLC hydraulic numerical control system 30 receives the digital pressure signal, and the digital pressure signal is converted into an electrical signal by the central control unit of the PLC hydraulic numerical control system, and then transmitted to the ultrahigh pressure execution system 31 through the pressure output unit, and the ultrahigh pressure execution system 31 receives the electrical signal.
- the pressure detecting unit of the PLC hydraulic numerical control system 30 dynamically detects the oil pressure value in real time, and feeds the pressure change information to the central control unit in time for processing into a digital signal, thereby dynamically displaying in real time on the visual human-computer interaction system, and
- the relief pressure history is stored in the PC monitoring system 29.
- the model displacement automatic test system 4 is mainly composed of a displacement transmission device, a displacement measuring device, a signal conversion device, a data processing device, and a computer system.
- the basic working flow of the model displacement automatic test system 4 is: when the model body is displaced, the displacement transmitting device first transmits the displacement of the model measuring point to the displacement measuring device through its flexible measuring rod, and the displacement measuring device measures the model through its grating sensor The point displacement is converted into a moiré fringe displacement; then, the signal conversion device converts the moiré fringe displacement into an electric pulse signal through its photoelectric conversion element, and transmits it to the data processing device; finally, the data processing device receives the electric pulse signal and outputs the electric pulse signal The pulse signal is converted into a digital signal, and the model displacement is calculated, and stored and displayed in real time on a computer. At the same time, the model displacement time history curve is automatically generated for the tester to dynamically observe and monitor the model displacement, and the model displacement automatic measurement is realized. Digital, visual and intelligent.
- the displacement measuring device is a grating scale sensor 54, which is a high-precision optical test element for measuring the displacement of the model measuring point by using Moire fringe movement, and is composed of an indicating grating and a scale grating;
- the signal conversion device is composed of a photoelectric conversion element, and its function is Converting the optical signal of the moiré fringe into an electrical pulse signal;
- the data processing device adopts a programmable controller, which stores the pre-programmed program in the memory of the central control unit, and is responsible for receiving the electrical pulse signal output by the signal conversion device. And converting the electric pulse signal into a digital signal, thereby calculating the model displacement, storing and displaying it in real time on a computer, and automatically generating a model displacement time history curve.
- the model displacement automatic test system 4 realizes the automatic detection of the displacement of the model by photoelectric conversion technology, and the photoelectric conversion principle of the displacement test is: the deformation of the test model body 18 drives the displacement of the embedded measurement point, and the displacement of the measurement point passes through the displacement transmission device.
- the flexible measuring rod is transmitted to the grating scale sensor of the displacement measuring device, thereby causing the indicating grating of the grating scale sensor to move relative to the scale grating.
- the optical signal can be converted into an electrical pulse signal by the photoelectric conversion element, and the electric pulse signal is converted into a digital displacement by the data processing device, and finally the real-time display is automatically stored and synchronized in the industrial computer.
- the displacement transmitting device includes a displacement measuring point 50, a PVC sleeve 51, a flexible thin steel wire rope 52, a friction reducing positioning disk 53, a displacement transmitting pulley 55, and a self-balancing hammer 56.
- the displacement measuring point 50 is a small-sized gear-shaped embedded object made of a manganese steel material.
- the displacement measuring rod is composed of a PVC sleeve 51, a flexible thin steel wire rope 52 and a friction reducing positioning plate 53.
- the displacement measuring rod adopts a flexible thin steel wire rope which is axially free from deformation and can be bent freely.
- the diameter of the wire rope is 0.5mm, which is made up of 49 strands of fine steel wire.
- the outer part of the thin steel wire rope is protected by a transparent PVC sleeve 51 with an inner diameter of 4mm and an outer diameter of 6mm.
- the manufacturing method of the displacement measuring rod is: fixing the flexible thin steel wire rope 52 and the displacement measuring point 50 with the AB glue, and passing the flexible thin steel wire rope 52 through the positioning hole of the friction reducing positioning plate 53 (the positioning hole is used for isolating the flexible thin steel wire measuring rope 52) Therefore, it can move in the fixed passage in the axial direction without contacting each other and not in contact with the PVC sleeve 51, which ensures that the flexible thin steel wire measuring rope 52 transmits the measuring point displacement with high precision and will pass through
- the anti-friction positioning disc 53 having the flexible thin steel wire rope 52 is fixed in the transparent PVC sleeve 51, thereby forming a displacement measuring rod.
- the displacement measuring point 50 is pre-buried inside the model body 18.
- the flexible thin steel wire rope 52 of the displacement measuring rod is connected to the displacement measuring point 50 at one end, and the other end is led out from the reserved cable hole of the model combined gantry reaction device 1.
- the over-displacement transmission pulley 55 is coupled to the scale sensor 54 of the displacement measuring device, and the end of the flexible thin steel cord 52 is tensioned by the self-balancing hammer 56.
- the invention adopts the invention to carry out a three-dimensional geomechanical model test on the formation collapse failure process of a deep-buried reservoir of a deep carbonate reservoir with a depth of nearly 6000 m
- Fig. 16 shows the collapse failure model of the ancient cavern formation in a deep-buried carbonate reservoir.
- the test panoramic photo Figure 17 is a close-up photograph of the collapse of the ancient cave in the deep-buried carbonate reservoir
- Figure 18 is the displacement map of the model after the collapse of the ancient cave
- Figure 19 shows the perimeter of the model cave after the collapse of the ancient cave.
- the stress distribution map is provided.
- the engineering application shows that the present invention panoramicly reproduces the formation and collapse of the ancient caves in deep-buried carbonate reservoirs.
- the nonlinear deformation characteristics and stress variation law of the surrounding rock in the collapse of the ancient cave are obtained, and the formation collapse failure mode of the ancient cave of the reservoir is revealed, which provides a way to optimize the oil exploitation of the ancient cave in the carbonate reservoir.
- the basis of important tests is that the reliability of the present invention is strongly verified by practical engineering applications.
- the invention has an important application prospect in simulating the nonlinear deformation and failure mechanism of deep underground caverns such as energy, transportation, hydropower and mine.
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Abstract
Description
Claims (14)
- 一种智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,包括组合式台架反力装置,超高压真三维非均匀加卸载装置,智能液压加卸载与稳压数控***、模型位移自动测试***和高清多探头窥视***;所述超高压真三维非均匀加卸载装置设置于组合式台架反力装置内对试验模型进行超高压真三维加卸载,所述智能液压加卸载与稳压数控***通过高压油管与所述超高压真三维非均匀加卸载装置连接;通过所述的智能液压加卸载与稳压数控***输入的加卸载指令数字伺服控制所述的超高压真三维非均匀加卸载装置进行超高压真三维梯度非均匀加卸载与稳压控制;所述的模型位移自动测试***自动采集模型内部任意部位的位移;所述的高清多探头窥视***实时动态观测洞室开挖变形破坏过程。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的组合式台架反力装置采用可拆卸的盒式构件连接组合而成,其尺寸可调,主要用于容纳试验模型并作为试验加载的反力装置。所述的组合式台架反力装置包括盒式底梁、盒式顶梁、盒式左立柱、盒式右立柱、盒式前反力墙构件、盒式后反力墙构件;所述的盒式底梁、盒式顶梁上下分布,通过盒式左、右立柱相连,形成一个矩形框架结构,矩形框架的前后设有盒式前反力墙构件和盒式后反力墙构件,整个组合式台架反力装置通过盒式构件连接组合而成。
- 如权利要求2所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,在所述的前反力墙中部设置了透明开挖窗口,所述的透明开挖窗口主要由高强钢骨架和钢化玻璃面板组成,在钢化玻璃面板中央设置了洞室开挖窗口。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的超高压真三维非均匀加卸载装置包含多个加载单元,分别固定在组合式台架反力装置的上、下、左、右、后五个面上进行主动真三维加载,模型正面采用位移约束的被动加载方式。
- 如权利要求4所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的加载单元有33个,其被分成8组,其中模型顶部设置的6个加载单元为第1组,模型底部设置的6个加载单元为第2组,模型左右两面分别设置6个加载单元,从上往下被分成3组,每组包含4个加载单元;模型后面设置9个加载单元,从上往下被分成3组,每组包含3个加载单元。
- 如权利要求5所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,8组加载单元分别由智能液压加卸载与稳压数控***控制的8个油路通道进行独立、 同步非均匀加卸载与稳压控制。
- 如权利要求5所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,每个加载单元包含1个液压千斤顶和1个台形传力加载模块;台形传力加载模块的底部紧贴模型表面的加载钢板,台形传力加载模块的顶部采用连接装置与液压千斤顶前端相连,液压千斤顶的后端通过连接装置连接在组合式台架反力装置的内壁上;利用台形传力加载模块和组合式台架反力装置可将液压千斤顶的荷载均匀施加到试验模型体上。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,紧靠试验模型外面设置了三维加载导向框装置,三维加载导向框装置由不锈钢方管焊接而成;加载前,模型加载钢板紧贴试验模型表面并嵌入导向框装置内一定深度。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的智能液压加卸载与稳压数控***主要由可视化人机交互***、PLC液压数控***和超高压执行***组成;所述的可视化人机交互***与PLC液压数控***进行信息传输;所述的PLC液压数控***和超高压执行***进行信息传输。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的可视化人机交互***包括人机界面HMI,PC监控***和软件***;所述的PLC液压数控***包括中央控制单元、压力输出单元和压力检测单元,所述的超高压执行***包括液压油路***和液压千斤顶;所述的软件***安装在所述的人机界面HMI和PC监控***上,所述的PC监控***与所述的中央控制单元、人机界面HMI之间进行信息的传输;人机界面HMI与所述的中央控制单元也进行信息的传输,所述的中央控制单元控制压力输出单元,压力输出单元控制液压油路***,液压油路***控制液压千斤顶;所述的压力检测单元实时动态检测液压千斤顶的压力变化,并将压力变化信息及时反馈给中央控制单元,中央控制单元将处理后的数字压力信息同步传输给人机界面HMI或PC监控***,并在人机界面HMI或PC监控***上显示。
- 如权利要求10所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的液压油路***包括步进电机、油泵、步进溢流阀、O型三位四通电磁换向阀、电磁球阀保压阀和同步阀;步进溢流阀用于调节油路压力,O型三位四通电磁换向阀用于控制油路的流向,电磁球阀保压阀用于***保压,同步阀用于同步加载。所述的步进电机启动油泵,将液压油泵入油路,后进入步进溢流阀,PLC液压数控***根据压力检测单元实时检测的压力反馈信息控制步进电机调节步进溢流阀的阀芯前进或者后退,实现油路压力的减小或者增大,从而完成加卸载过程;当液压油路***的压力发生变化时,PLC液压数控系 统便会伺服控制步进溢流阀进行增压或者降压,实现瞬时补压,并通过电磁球阀保压阀使加载***保持稳压状态。另外,通过步进溢流阀的变频调试,结合步进电机的无极调速,可以将液压油路***的启动压力降低到0MPa,实现加压零起步。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的模型位移自动测试***主要由位移传递装置、位移测量装置、信号转换装置、数据处理装置和计算机***组成;所述的位移传递装置检测试验模型的位移,并通过位移测量装置将位移信息传递给信号转换装置,所述的信号转换装置与数据处理装置进行信息的传输,所述的数据处理装置与计算机进行信息传输。
- 如权利要求12所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,当模型体产生位移时,位移传递装置通过柔性测杆将模型测点位移传递给位移测量装置,位移测量装置通过其光栅尺传感器将模型测点位移转化为莫尔条纹位移;信号转换装置通过其光电转换元件将莫尔条纹位移转换为电脉冲信号,并传输给数据处理装置;数据处理装置接收电脉冲信号并将电收脉冲信号转化为数字信号,从而计算出模型位移,并在计算机***上实时存储和显示,同时自动生成模型位移时程曲线,供试验人员动态观察和监控模型位移,实现模型位移自动量测的数字化、可视化和智能化。
- 如权利要求1所述的智能数控超高压真三维非均匀加卸载与稳压模型试验***,其特征在于,所述的高清多探头窥视***主要由微型高清探头、高速摄像控制面板、数据存储箱及液晶显示器组成;所述的微型高清探头包括多个,多个微型高清探头布置在模型洞室内、外任意部位;所采集到的录像一方面在自带液晶显示器上实时显示,另一方面自动存储在数据存储器中。
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PCT/CN2017/082448 WO2018195919A1 (zh) | 2017-04-28 | 2017-04-28 | 智能数控超高压真三维非均匀加卸载与稳压模型试验*** |
US15/762,712 US10408718B2 (en) | 2017-04-28 | 2017-04-28 | Three-dimensional non-uniform loading/unloading and steady pressure model test system |
CN201780002869.1A CN108124460B (zh) | 2017-04-28 | 2017-04-28 | 智能数控超高压真三维非均匀加卸载与稳压模型试验*** |
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US20190078987A1 (en) | 2019-03-14 |
AU2017329096B2 (en) | 2019-01-31 |
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US10408718B2 (en) | 2019-09-10 |
AU2017329096A1 (en) | 2018-11-08 |
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