Fault fracture zone permeability in-situ testing device and use method thereof

Abstract

The invention discloses a fault fracture zone permeability in-situ testing device and a using method thereof.The fault fracture zone permeability in-situ testing device comprises a base, an in-situ tester body, a rotating switching mechanism, a lifting drilling mechanism and a testing mechanism, the in-situ tester body is fixedly arranged on one side of the base, a support is fixedly arranged on one side of the base, and a switching rotating disc is rotationally arranged on the other side of the support; a water tank is fixedly arranged in the middle of the base, a water pump is fixedly arranged above the water tank, an air pump is fixedly arranged on one side of the base, a butt joint mechanism is arranged in the middle of the support, a lifting drilling mechanism is arranged in the middle of one side of the support, and a testing mechanism is arranged below one side of the support; the switching turntable drives the first butt joint pipe to rotate so as to realize one-key switching butt joint of the air pump and the water pump pipeline, the problem that a traditional device cannot quickly switch water injection or gas injection according to actual conditions is solved, and the electric telescopic rod telescopically controls the lifting plate and the punching drill bit to ascend and descend so as to realize integrated punching test.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ measurement in geotechnical engineering, and particularly to an in-situ testing device for the permeability of fault fracture zones and its usage method. Background Art

[0002] An in-situ testing device for the permeability of fault fracture zones is a special equipment for directly measuring the permeability characteristics of geological structures (such as fault fracture zones) on-site. Its core functions include pore water pressure monitoring, determination of permeability coefficient, and groundwater sampling, etc., providing key data for engineering geological assessment and groundwater research. Through the integration of pressure monitoring, data storage, and portable design, it provides an efficient solution for the permeability analysis of complex geological environments. Its technical core combines pressure dynamic response and digital analysis, and is applicable to the fields of engineering, environment, and scientific research;

[0003] In the utility model with the application number 202222264439.8, a permeability tester is disclosed. Through the cooperation of a driving motor, a threaded rod, a threaded sleeve, a limiting rod, an adjusting rod, an electric push rod, a fixed cylinder, a servo motor, a gear, a toothed plate, a connecting plate, and a detection probe, the electric push rod drives the fixed cylinder to move up and down, the output shaft of the driving motor drives the limiting rod to move through the threaded rod and the threaded sleeve, the limiting rod drives the electric push rod to tilt through the adjusting rod so that the fixed cylinder can better contact the surface of the object to be tested, and the output shaft of the servo motor drives the connecting plate to move through the gear and the toothed plate, so that the detection probe fits tightly with the surface of the object to be tested, thereby achieving the effect of high test accuracy and solving the problem of low test accuracy of the existing device. Through the cooperation of the limiting rod and the limiting groove, it is convenient to limit the threaded sleeve and improve the safety of the device. Through the cooperation of the slider and the chute, it is convenient to limit the toothed plate. Through the cooperation of the positioning hole and the pin, it is convenient to limit the gear;

[0004] However, when the above-mentioned permeability tester is used to test the fault fracture zone, there are the constant head method, the variable head method, and the air pressure method. Among them, the constant head method and the variable head method are respectively applicable to high-permeability media and low-permeability media, while the air pressure method is applicable to dry environments such as fractured rock masses, making the device unable to quickly switch between water injection and gas injection according to the actual situation. When the above-mentioned permeability tester is used for testing, it is necessary to manually drill holes at the position to be tested, and the test efficiency is relatively low. Therefore, the present invention proposes an in-situ testing device for the permeability of fault fracture zones and its usage method to solve the problems existing in the prior art. Summary of the Invention

[0005] In view of the above problems, the object of the present invention is to provide an in-situ testing device for the permeability of fault fracture zones and its use method. The in-situ testing device for the permeability of fault fracture zones and its use method realize one-key switching and docking of the air pump and water pump pipelines by driving the first docking pipe to rotate through a switching turntable, greatly improving the detection mode switching efficiency, effectively integrating the dual-mode detection functions of the water head method and the air pressure method, and solving the problem that traditional devices cannot quickly switch between water injection and gas injection according to actual situations. The lifting of the lifting plate and the drilling bit is controlled by the telescopic movement of the electric telescopic rod, and the drilling bit is driven by the motor to rotate for drilling, realizing integrated drilling and testing.

[0006] To achieve the object of the present invention, the present invention is realized through the following technical solutions: An in-situ testing device for the permeability of fault fracture zones and its use method, including a base, an in-situ tester body, a rotation switching mechanism, a lifting drilling mechanism and a testing mechanism. On one side of the base, an in-situ tester body is fixedly provided. The rotation switching mechanism includes a bracket, a switching turntable, a first docking pipe, a water tank, a water pump, an air pump and a docking mechanism. On one side of the base, a bracket is fixedly provided. On the other side of the bracket, a switching turntable is rotatably provided. The first docking pipes are symmetrically and fixedly provided on the upper and lower sides of the switching turntable. In the middle of the base, a water tank is fixedly provided. Above the water tank, a water pump is fixedly provided. On one side of the base, an air pump is fixedly provided. A docking mechanism is provided in the middle of the bracket. A lifting drilling mechanism is provided in the middle of one side of the bracket. A testing mechanism is provided below one side of the bracket.

[0007] Further improvement lies in: The docking mechanism includes a second docking pipe, a docking sleeve, a spring and a first sealing ring. On one side of the bracket, a second docking pipe is fixedly provided. The upper end of the second docking pipe is slidably sleeved with a docking sleeve. Springs are symmetrically and fixedly provided on one side of the docking sleeve up and down. First sealing rings are symmetrically and fixedly provided in the docking sleeve.

[0008] Further improvement lies in: The switching turntable is electrically driven by a motor, and the water pump and the air pump are respectively connected to the first docking pipe through hoses.

[0009] Further improvement lies in: One end of the spring is close to the bracket, and the other end of the docking sleeve corresponds to the position of the first docking pipe.

[0010] Further improvement lies in: The lifting drilling mechanism includes a fixing plate, an electric telescopic rod, a lifting plate, a motor, a drilling bit, a stable slide rail and a slider. On one side of the bracket, a fixing plate is fixedly provided. Electric telescopic rods are symmetrically and fixedly provided on the fixing plate. The telescopic end of the electric telescopic rod is fixedly provided with a lifting plate. In the middle of the lifting plate, a motor is fixedly provided. The output end of the motor is drivingly connected with a drilling bit. Stable slide rails are symmetrically and fixedly provided in front of and behind the fixing plate below. Sliders are symmetrically and fixedly provided on the front and back of the lifting plate. The sliders are correspondingly and slidably matched with the stable slide rails.

[0011] A further improvement lies in that: the testing mechanism includes a hollow probe, a pore water pressure sensor, a barometric pressure sensor, and a second sealing ring. The lower end of the second docking pipe is fixedly provided with a hollow probe. A second sealing ring is fixedly arranged on the outer side of the hollow probe. A pore water pressure sensor is fixedly arranged on one side of the bottom of the hollow probe, and a barometric pressure sensor is fixedly arranged on the other side of the bottom of the hollow probe. The pore water pressure sensor and the barometric pressure sensor are electrically connected to the in-situ tester body.

[0012] A further improvement lies in that: universal wheels are fixedly arranged at the four corners of the bottom of the base, and a handle is fixedly arranged on the other side of the base.

[0013] A further improvement lies in the following steps:

[0014] Step 1: Lift and drill holes. Push the handle and cooperate with the universal wheels to horizontally move the base to the position beside the area to be detected. Extend the electric telescopic rod to push the lifting plate and the drilling bit down. At the same time, the motor drives the drilling bit to rotate for drilling. After drilling, the electric telescopic rod retracts.

[0015] Step 2: Rotate and switch. Drive the switching turntable to rotate by the motor so that the second docking pipe is respectively switched and communicated with the air pump and the water pump through the first docking pipe.

[0016] Step 3: Elastic docking. Use the spring to elastically push the docking sleeve to elastically expand and contract. When the first docking pipe and the second docking pipe are docked, the spring pushes the docking sleeve to cover the first docking pipe and the second docking pipe to achieve dynamic sealing.

[0017] Step 4: Pressure detection. Pull the lower end of the second docking pipe to stretch and insert the hollow probe into the hole drilled in Step 3. Use the pore water pressure sensor to sense the change in water pressure and the barometric pressure sensor to sense the change in air pressure. The in-situ tester body collects the data.

[0018] The beneficial effects of the present invention are as follows: The present invention drives the first docking pipe to rotate through the switching turntable to realize one-key switching and docking of the air pump and water pump pipelines, greatly improving the switching efficiency of the detection mode, effectively integrating the dual-mode detection functions of the water head method and the barometric pressure method, solving the problem that the traditional device cannot quickly switch between water injection and gas injection according to the actual situation, controlling the lifting of the lifting plate and the drilling bit by the telescopic movement of the electric telescopic rod, and driving the drilling bit to rotate for drilling by the motor to realize integrated drilling and testing. Description of the Drawings

[0019] Figure 1 It is the overall front view of the present invention;

[0020] Figure 2 It is the front view cross-sectional view of the docking sleeve of the present invention;

[0021] Figure 3 It is the enlarged schematic view at A of the present invention;

[0022] Figure 4 This is the process flow chart of the present invention.

[0023] Wherein: 1. Base; 2. In-situ tester body; 3. Bracket; 4. Switching turntable; 5. First docking pipe; 6. Water tank; 7. Water pump; 8. Air pump; 9. Second docking pipe; 10. Docking sleeve; 11. Spring; 12. First sealing ring; 13. Fixed plate; 14. Electric telescopic rod; 15. Lifting plate; 16. Motor; 17. Drilling bit; 18. Stable slide rail; 19. Slide block; 20. Hollow probe; 21. Pore water pressure sensor; 22. Air pressure sensor; 23. Second sealing ring; 24. Universal wheel; 25. Handle. Specific embodiments

[0024] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0025] According to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, this embodiment provides an in-situ test device for the permeability of fault fracture zones and its use method, including a base 1, an in-situ tester body 2, a rotation switching mechanism, a lifting drilling mechanism, and a testing mechanism. An in-situ tester body 2 is fixedly provided on one side of the base 1. The rotation switching mechanism includes a bracket 3, a switching turntable 4, a first docking pipe 5, a water tank 6, a water pump 7, an air pump 8, and a docking mechanism. A bracket 3 is fixedly provided on one side of the base 1, and a switching turntable 4 is rotatably provided on the other side of the bracket 3. First docking pipes 5 are symmetrically fixed above and below the switching turntable 4. A water tank 6 is fixedly provided in the middle of the base 1, a water pump 7 is fixedly provided above the water tank 6, and an air pump 8 is fixedly provided on one side of the base 1. The switching turntable 4 is driven by a motor. The water pump 7 and the air pump 8 are respectively connected to the first docking pipe 5 through hoses. When it is necessary to switch the detection type, the switching turntable 4 is rotated by the motor, so that different groups of first docking pipes 5 are docked with the second docking pipe 9 through the docking sleeve 10, and the second docking pipe 9 is respectively connected to the air pump 8 and the water pump 7, realizing a quick switch between the water injection mode and the air injection mode, and solving the problem that the head method and the air pressure method are respectively applicable to different environments, and the traditional device cannot quickly switch the water injection and air injection detections to be compatible with the environment according to the actual situation. A docking mechanism is provided in the middle of the bracket 3, a lifting drilling mechanism is provided in the middle on one side of the bracket 3, and a testing mechanism is provided below one side of the bracket 3.

[0026] ​The docking mechanism includes a second docking pipe 9, a docking sleeve 10, a spring 11 and a first sealing ring 12. A second docking pipe 9 is fixedly provided on one side of the bracket 3. The upper end of the second docking pipe 9 is slidably sleeved with a docking sleeve 10. Springs 11 are symmetrically and fixedly provided on one side of the docking sleeve 10 in the vertical direction. First sealing rings 12 are symmetrically and fixedly provided inside the docking sleeve 10. One end of the spring 11 is close to the bracket 3, and the other end of the docking sleeve 10 corresponds to the position of the first docking pipe 5. When the corresponding first docking pipe 5 rotates to the position of the second docking pipe 9 along with the switching turntable 4, the docking sleeve 10 is squeezed to compress the spring 11. When the first docking pipe 5 is docked with the second docking pipe 9, the spring 11 pushes the docking sleeve 10 to pop out and sleeve at the interface of the first docking pipe 5 and the second docking pipe 9, which is convenient for water injection or gas injection. The first sealing ring 12 is used to improve the sealing performance after docking.

[0027] The lifting drilling mechanism includes a fixing plate 13, an electric telescopic rod 14, a lifting plate 15, a motor 16, a drilling bit 17, a stable slide rail 18 and a slider 19. A fixing plate 13 is fixedly provided on one side of the bracket 3. Electric telescopic rods 14 are symmetrically and fixedly provided on the fixing plate 13. The telescopic ends of the electric telescopic rods 14 are fixedly provided with a lifting plate 15. A motor 16 is fixedly provided in the middle of the lifting plate 15. The output end of the motor 16 is drivingly connected with a drilling bit 17. Stable slide rails 18 are symmetrically and fixedly provided below the fixing plate 13. Sliders 19 are symmetrically and fixedly provided on the front and back of the lifting plate 15. The sliders 19 are correspondingly and slidably matched with the stable slide rails 18. When drilling is required before testing, the base 1 is pushed to the braking position, and then the electric telescopic rod 14 extends to push the lifting frame to slide downward along the stable slide rail 18. The motor 16 drives the drilling bit 17 to rotate to drill the land, which is convenient for inserting the hollow probe 20 for detection.

[0028] The testing mechanism includes a hollow probe 20, a pore water pressure sensor 21, a gas pressure sensor 22 and a second sealing ring 23. A hollow probe 20 is fixedly provided at the lower end of the second docking pipe 9. A second sealing ring 23 is fixedly provided on the outer side of the hollow probe 20. A pore water pressure sensor 21 is fixedly provided on one side of the bottom of the hollow probe 20, and a gas pressure sensor 22 is fixedly provided on the other side of the bottom of the hollow probe 20. The pore water pressure sensor 21 and the gas pressure sensor 22 are electrically connected to the in-situ tester body 2. After the drilling is completed, the electric telescopic rod 14 retracts to drive the lifting plate 15 and the drilling bit 17 to rise, and the second docking pipe 9 is pulled to unfold to insert the hollow probe 20 into the hole. The second sealing ring 23 is used to seal by fitting the hole wall. When switching to the water injection mode, the water pump 7 is started to pump out the water in the water tank 6 and inject it into the hole through the second docking pipe 9. The water pressure change is detected by the pore water pressure sensor. When switching to the gas injection mode, the air pump 8 is started to inflate and inject it into the hole through the second docking pipe 9. The gas pressure change is detected by the gas pressure sensor 22, which is convenient for the in-situ tester body 2 to collect data.

[0029] Four universal wheels 24 are fixedly provided at the four corners of the bottom of the base 1, and a handle 25 is fixedly provided on the other side of the base 1, which facilitates horizontal movement in a more labor-saving manner.

[0030] Specifically, it includes the following steps:

[0031] Step 1: Lifting and drilling. Push the handle and cooperate with the universal wheels to horizontally move the base to the position beside the area to be detected. Extend the electric telescopic rod to push the lifting plate and the drilling bit downward. At the same time, the motor drives the drilling bit to rotate for drilling. After drilling, the electric telescopic rod retracts.

[0032] Step 2: Rotating and switching. Drive the switching turntable to rotate by the motor so that the second docking pipe is respectively switched and communicated with the air pump and the water pump through the first docking pipe.

[0033] Step 3: Elastic docking. Use the spring to elastically push the docking sleeve to elastically expand and contract. When the first docking pipe and the second docking pipe are docked, the spring pushes the docking sleeve to sleeve the first docking pipe and the second docking pipe to achieve dynamic sealing.

[0034] Step 4: Pressure detection. Pull the lower end of the second docking pipe to stretch so that the hollow probe is inserted into the hole drilled in Step 3. Use the pore water pressure sensor to sense the water pressure change, use the air pressure sensor to sense the air pressure change, and collect data by the in-situ tester body.

[0035] When the in-situ testing device for the permeability of the fault fracture zone and its using method work, first move to the detection area through the bottom universal wheels, and drive the drill bit to lift and lower by the electric telescopic rod to implement the soil layer drilling operation; then rotate the switching mechanism to drive the switching turntable through the motor to accurately connect the docking pipelines of the air pump or the water pump and the hollow probe, and realize the rapid switching of the gas injection / water injection mode; during the testing process, the hollow probe with a sealing ring is embedded in the hole to ensure the tightness, inject gas or water into the formation according to the detection requirements, and monitor the pressure conduction data in real time through the pore water pressure sensor and the air pressure sensor. All dynamic parameters are synchronously collected and analyzed by the in-situ tester. Finally, the dual-mode detection functions of the water head method and the air pressure method are integrated into one, effectively adapting to the in-situ testing requirements of different geological environments.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. In-situ testing device for permeability of fault fracture zone, characterized in that: It includes a base (1), an in-situ tester body (2), a rotation switching mechanism, a lifting drilling mechanism, and a testing mechanism. On one side of the base (1), the in-situ tester body (2) is fixedly provided. The rotation switching mechanism includes a bracket (3), a switching turntable (4), a first docking pipe (5), a water tank (6), a water pump (7), an air pump (8), and a docking mechanism. On one side of the base (1), the bracket (3) is fixedly provided. On the other side of the bracket (3), the switching turntable (4) is rotatably provided. The first docking pipes (5) are symmetrically and fixedly provided on the upper and lower sides of the switching turntable (4). In the middle of the base (1), the water tank (6) is fixedly provided. Above the water tank (6), the water pump (7) is fixedly provided. On one side of the base (1), the air pump (8) is fixedly provided. In the middle of the bracket (3), the docking mechanism is provided. On the middle of one side of the bracket (3), the lifting drilling mechanism is provided. Below one side of the bracket (3), the testing mechanism is provided.

2. The in-situ testing device for the permeability of a fault fracture zone according to claim 1, wherein: The docking mechanism includes a second docking pipe (9), a docking sleeve (10), a spring (11), and a first sealing ring (12). On one side of the bracket (3), the second docking pipe (9) is fixedly provided. The docking sleeve (10) is slidably sleeved on the upper end of the second docking pipe (9). The springs (11) are symmetrically and fixedly provided on one side of the docking sleeve (10) in the up and down directions. The first sealing rings (12) are symmetrically and fixedly provided inside the docking sleeve (10).

3. The in-situ testing device for the permeability of the fault fracture zone according to claim 1, wherein: The switching turntable (4) is electrically driven by a motor. The water pump (7) and the air pump (8) are respectively connected to the first docking pipe (5) through hoses.

4. The in-situ test device for the permeability of the fault fracture zone according to claim 2, characterized in that: One end of the spring (11) is close to the bracket (3), and the other end of the docking sleeve (10) corresponds to the position of the first docking pipe (5).

5. The in-situ test device for the permeability of a fault fracture zone according to claim 1, characterized in that: The lifting drilling mechanism includes a fixing plate (13), an electric telescopic rod (14), a lifting plate (15), a motor (16), a drilling bit (17), a stable slide rail (18), and a slider (19). On one side of the bracket (3), the fixing plate (13) is fixedly provided. The electric telescopic rods (14) are symmetrically and fixedly provided on the fixing plate (13). The telescopic ends of the electric telescopic rods (14) are fixedly provided with the lifting plate (15). In the middle of the lifting plate (15), the motor (16) is fixedly provided. The output end of the motor (16) is drivingly connected to the drilling bit (17). The stable slide rails (18) are symmetrically and fixedly provided in the front and back below the fixing plate (13). The sliders (19) are symmetrically and fixedly provided on the front and back of the lifting plate (15). The sliders (19) are correspondingly and slidably matched with the stable slide rails (18).

6. The in-situ permeability testing device for fault fracture zones according to claim 2, characterized in that: The test mechanism includes a hollow probe (20), a pore water pressure sensor (21), a barometric pressure sensor (22), and a second sealing ring (23). The lower end of the second docking pipe (9) is fixedly provided with a hollow probe (20). The second sealing ring (23) is fixedly arranged on the outer side of the hollow probe (20). One side of the bottom of the hollow probe (20) is fixedly provided with a pore water pressure sensor (21), and the other side of the bottom of the hollow probe (20) is fixedly provided with a barometric pressure sensor (22). The pore water pressure sensor (21) and the barometric pressure sensor (22) are electrically connected to the in-situ tester body (2).

7. The in-situ test device for the permeability of the fault fracture zone according to claim 1, characterized in that: Four universal wheels (24) are fixedly arranged at the four corners of the bottom of the base (1), and a handle (25) is fixedly arranged on the other side of the base (1).

8. Method for using an in-situ test device for the permeability of a fault fracture zone, comprising the following steps: Step 1: Lift and drill a hole. Push the handle and cooperate with the universal wheels to horizontally move the base to the position beside the area to be detected. Extend the electric telescopic rod to push the lifting plate and the drilling bit down. At the same time, the motor drives the drilling bit to rotate for drilling. After drilling, retract the electric telescopic rod; Step 2: Rotate and switch. Drive the switching turntable to rotate by the motor so that the second docking pipe is respectively switched and communicated with the air pump and the water pump through the first docking pipe; Step 3: Elastic docking. Use the elasticity of the spring to push the docking sleeve to elastically expand and contract. When the first docking pipe and the second docking pipe are docked, the spring pushes the docking sleeve to cover the first docking pipe and the second docking pipe to achieve dynamic sealing; Step 4: Pressure detection. Pull the lower end of the second docking pipe to stretch and insert the hollow probe into the hole drilled in Step 3. Use the pore water pressure sensor to sense the change in water pressure, use the barometric pressure sensor to sense the change in air pressure, and collect data by the in-situ tester body.

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