Karst area grouting durability prediction device and use method thereof
By designing microfluidic chips and conductivity sensors in the karst area to simulate grouting cement soil under different conditions, the problem of complex environment and material performance uncertainty is solved, and the accuracy and reliability of grouting durability prediction is improved.
Patent Information
- Application Number
- CN202411146433.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2024-12-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art is difficult to fully and accurately simulate complex environments in the prediction of grouting durability in karst area. The performance of grouting materials is uncertain, long-term monitoring data is scarce, and the prediction model is limited, resulting in high uncertainty in the prediction results.
A karst area grouting durability prediction device is designed, including a microfluidic chip and conductivity sensor. By simulating the impact of different flow rates, channel shapes and sizes on calcium ions in grouted groundwater, combined with microscope shooting and precision control of stepper motors , obtain detailed data to support prediction.
It realizes a more accurate reflection of the durability performance of actual grouting materials, obtains a large amount of detailed data, supports statistical analysis and model establishment, and improves the reliability and accuracy of predictions.
Smart Images
Figure CN119125237A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of grouting durability prediction, and specifically refers to a grouting durability prediction device for a karst area and a use method thereof. Background Art
[0002] The prediction of grouting durability in karst areas is a crucial technology in the field of civil engineering, which aims to evaluate the service life of grouting materials in complex karst environments. Grouting life prediction quantitatively evaluates the long-term stability and durability of grouting bodies by comprehensively considering geological conditions, grouting material properties, environmental factors, and time effects. However, current technologies still face significant challenges in this field.
[0003] First, the simulation of complex environment is the primary difficulty. The geological structure of karst areas is intricate, and groundwater flow, karst fissures and pore structures are intertwined. The interaction between these factors has a profound impact on the performance of grouting cement soil. Existing technologies are difficult to fully and accurately simulate these complex environments, resulting in deviations between the prediction results and the actual situation; secondly, the uncertainty of grouting material performance is also a major obstacle. The performance of grouting materials is affected by many factors such as material ratio, preparation process, and use environment. Slight changes in these factors may cause performance instability, which in turn causes trouble in the prediction of grouting life; thirdly, the lack of long-term monitoring data is also an important factor restricting the accuracy of prediction. The durability assessment of grouting cement soil needs to be based on long-term and systematic monitoring data, but due to factors such as funds, technology and human resources, it is often difficult to obtain sufficient long-term data support in actual projects, which weakens the reliability of the prediction results; finally, the limitations of the prediction model cannot be ignored. At present, the prediction of karst grouting life mostly relies on mathematical models and algorithms. These models are often based on simplifications and assumptions, and it is difficult to fully reflect the complexity of the actual situation. The prediction results between different models vary greatly, which further increases the uncertainty of the prediction results. Summary of the invention
[0004] In order to solve the above-mentioned problems, the present invention proposes a karst area grouting durability prediction device and a method for using the same.
[0005] The technical solution adopted by the present invention is as follows: The present invention provides a karst area grouting durability prediction device, including a detection base, a microscope is provided at the upper end of the detection base, a microfluid pump is provided on one side of the detection base, a detection water source storage box is provided on one side of the microfluid pump, a microfluid chip 1 is provided at the upper end of the detection base, a microfluid chip 2 is provided at the upper end of the detection base, the microfluid chip 2 is provided on one side of the microfluid chip 1, a test tube rack 1 is provided on the outer side wall of the detection base, and the detection base A test tube rack 2 is provided on the other outer wall, a conductivity sensor 1 is provided on the side wall of the test tube rack 1, a conductivity sensor 2 is provided on the outer wall of the test tube rack 2, one end of a water suction pipe is installed on the suction end of the microfluidic pump, and the other end of the water suction pipe is arranged in a detection water source storage box, the output end of the microfluidic pump is penetrated and installed with one end of a water delivery pipe, the other end of the water delivery pipe is penetrated and connected to a microfluidic chip 1, and the other end of the water delivery pipe is penetrated and connected to a microfluidic chip 2, and a precision control stepping motor is provided on the microfluidic pump.
[0006] Furthermore, the microfluidic chip is provided with an input liquid isobaric surface 1, and the input liquid isobaric surface 1 is provided with a frame cavity 1, the lower end of the frame cavity 1 penetrates one end of the input tube 1, the other end of the input tube 1 penetrates the side wall connected to the water pipe, the side wall of the frame cavity 1 penetrates one end of the folded line output channel 1, and the other end of the folded line output channel 1 is installed with a switch valve 1, one side of the switch valve 1 penetrates one end of the connecting conduit 1, the side wall of the frame cavity 1 penetrates one end of the folded line output channel 2, the folded line output channel 2 is arranged on one side of the folded line output channel 1, and the other end of the folded line output channel 2 is installed with a switch valve 2, the One side of the switch valve 2 passes through one end of the connecting conduit 2, and the diameters of the folded line output channel 1 and the folded line output channel 2 are different. The other side wall of the frame cavity 1 passes through one end of the connected linear output channel 1, and the other end of the linear output channel 1 is installed with a switch valve 3, one side of the switch valve 3 passes through one end of the connected conduit 3, and the other side wall of the frame cavity 1 passes through one end of the connected linear output channel 2. The linear output channel 2 is arranged on one side of the linear output channel 1, and the other end of the linear output channel 2 is installed with a switch valve 4, one side of the switch valve 4 passes through one end of the connected conduit 4, and the diameters of the linear output channel 1 and the linear output channel 2 are different.
[0007] Furthermore, the microfluidic chip 2 is provided with an input liquid isobaric surface 2, and the input liquid isobaric surface 2 is provided with a frame cavity 2, the upper end of the frame cavity 2 is connected to one end of the input channel 2, and the other end of the input channel 2 is connected to the other side wall of the water pipe, and the side wall of the frame cavity 2 is connected to one end of the curved output channel 1, and the other end of the curved output channel 1 is installed with a switch valve 7, one side of the switch valve 7 is connected to one end of the connecting conduit 5, and the side wall of the frame cavity 2 is connected to one end of the curved output channel 2, and the curved output channel 2 is arranged on one side of the curved output channel 1, and the curved output channel 2 A switch valve eight is installed at the other end, and one side of the switch valve eight penetrates one end of the connecting conduit six. The tortuosity of the curved output channel one and the curved output channel two are different. The other side wall of the frame cavity two penetrates one end of the curved output channel one. A switch valve five is installed at the other end of the curved output channel one, and one side of the switch valve five penetrates one end of the connecting conduit seven. The other side wall of the frame cavity two penetrates one end of the connecting curved output channel two. The curved output channel two is arranged on one side of the curved output channel one. A switch valve six is installed at the other end of the curved output channel two, and one side of the switch valve six penetrates one end of the connecting conduit eight.
[0008] Further, test tube one is arranged in the test tube rack one, test tube two is arranged in the test tube rack one, test tube two is arranged at one side of test tube one, the other end of catheter one is arranged in test tube one, the other end of catheter two is arranged in test tube two, the connection end of conductivity sensor one is arranged at one end of connecting wire one, the other end of connecting wire one is arranged in test tube one, the connection end of conductivity sensor one is arranged at one end of connecting wire two, the other end of connecting wire two is arranged in test tube two, test tube five is arranged in the test tube rack one, test tube six is arranged in the test tube rack one, test tube six is arranged at one side of test tube five, the other end of catheter five is arranged in test tube five, the other end of catheter six is arranged in test tube six, the connection end of conductivity sensor one is arranged at one end of connecting wire five, the other end of connecting wire five is arranged in test tube five, the connection end of conductivity sensor one is arranged at one end of connecting wire six, the other end of connecting wire six is arranged in test tube six.
[0009] Further, test tube three is arranged in the test tube rack two, test tube four is arranged in the test tube rack two, test tube four is arranged on one side of test tube three, the other end of conduit three is arranged in test tube three, the other end of conduit four is arranged in test tube four, the connection end of conductivity sensor two is arranged with one end of connecting wire three, the other end of connecting wire three is arranged in test tube three, the connection end of conductivity sensor two is arranged with one end of connecting wire four, the other end of connecting wire four is arranged in test tube four, test tube seven is arranged in the test tube rack two, test tube eight is arranged in the test tube rack two, test tube eight is arranged on one side of test tube seven, the connection end of conductivity sensor two is arranged with one end of connecting wire seven, the other end of connecting wire seven is arranged in test tube seven, the connection end of conductivity sensor two is arranged with one end of connecting wire eight, the other end of connecting wire eight is arranged in test tube eight.
[0010] The present invention also discloses a method for using a karst region grouting durability prediction device, which mainly includes the following steps:
[0011] Step 1: Place a groundwater sample obtained from the karst area in advance in the test water source storage box, start the microfluidic pump to transport the groundwater in the test water source storage box to the microfluidic chip 1 and the microfluidic chip 2 through the pumping pipe and the water delivery pipe;
[0012] Step 2: Control the flow rate by precisely controlling the stepper motor, the groundwater enters the frame cavity 1 through the input pipe 1, and flows out from the broken line output channel 1, the broken line output channel 2, the straight line output channel 1 and the straight line output channel 2 respectively, the groundwater through the broken line output channel 1 flows into the test tube 1 through the conduit 1, the groundwater through the broken line output channel 2 flows into the test tube 2 through the conduit 2, the groundwater through the straight line output channel 1 flows into the test tube 3 through the conduit 3, the groundwater through the straight line output channel 2 flows into the test tube 4 through the conduit 4, the groundwater enters the frame cavity 2 through the input channel 2, and flows out from the curve output channel 1, the curve output channel 2, the switch valve 5 and the switch valve 6 respectively, the groundwater through the curve output channel 1 flows into the test tube 5 through the conduit 5, the groundwater through the curve output channel 2 flows into the test tube 6 through the conduit 6, the groundwater through the curve output channel 1 flows into the test tube 7 through the conduit 7, and the groundwater through the curve output channel 2 flows into the test tube 8 through the conduit 8;
[0013] Step 3: In the initial state, take pictures of the states of the microfluidic chip 1 and the microfluidic chip 2 through a microscope, take pictures again through a microscope after a period of time, compare the internal changes of the microfluidic chip 1 and the microfluidic chip 2, and compare the width changes of the broken line output channel 1, the broken line output channel 2, the straight line output channel 1, the straight line output channel 2, the curved line output channel 1, the curved line output channel 2, the curved line output channel 1 and the curved line output channel 2 through the pictures;
[0014] Step 4: By using conductivity sensor 1 to measure the calcium ion concentration of the leaching solution in test tube 1, test tube 2, test tube 5 and test tube 6, and by using conductivity sensor 2 to measure the calcium ion concentration of the leaching solution in test tube 3, test tube 4, test tube 7 and test tube 8, the calcium ion concentration of groundwater leached in the same microchannel under different flow rate conditions, the calcium ion concentration of groundwater leached in microchannels of different sizes under the same flow rate conditions, the calcium ion concentration of groundwater leached in microchannels of the same size under the same flow rate conditions, and the calcium ion concentration of groundwater leached in microchannels of different tortuosity under the same flow rate conditions are obtained.
[0015] The beneficial effects achieved by the present invention using the above structure are as follows:
[0016] (1) The settings of microfluidic chip 1 and microfluidic chip 2 can accurately simulate the effects of different flow rates, channel shapes (such as straight lines, broken lines, zigzag lines and curves) and sizes on the leaching of calcium ions in grouting groundwater, and can more accurately reflect the durability performance of grouting materials in actual karst areas under different conditions.
[0017] (2) Simultaneously controlling multiple variables (e.g., flow rate, channel shape, and tortuosity) and measuring the effects of these variables on calcium ion leaching separately will help to fully understand and predict the life of grouting cement soil.
[0018] (3) By comparing the changes in microfluidic chip 1 and microfluidic chip 2 under different conditions and the measurement results of groundwater calcium ion concentration in the test tube, a large amount of detailed and comparable data can be obtained. These data provide a solid foundation for subsequent statistical analysis, model building and prediction.
[0019] (4) The method of using a microscope to photograph the internal states of microfluidic chip 1 and microfluidic chip 2 can observe their changes without destroying the samples. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0021] Figure 1 This is a front view of a grouting durability prediction device for karst areas according to the present invention;
[0022] Figure 2 This is a front cross-sectional view of a grouting durability prediction device for karst areas according to the present invention;
[0023] Figure 3 This is a top view of the detection base.
[0024] Among them, 1. detection water source storage box, 2. microfluidic pump, 3. microfluidic chip 1, 4. microfluidic chip 2, 5. detection base, 6. microscope, 7. test tube rack 1, 8. test tube rack 2, 9. conductivity sensor 1, 10. conductivity sensor 2, 11. pumping pipe, 12. water pipe, 13. precision control stepper motor, 14. input pipe 1, 15. input liquid isobaric surface 1, 16. frame cavity 1, 17. folded line output channel 1, 18. folded line output channel 2, 19. linear output channel 1, 20. linear output channel 2, 21. switch valve 1, 22. switch valve 2, 23. switch valve 3, 24. switch valve 4, 25. input channel 2, 26. input liquid isobaric surface 2, 27. frame cavity 2, 28. curve output channel Channel one, 29, curve output channel two, 30, curve output channel one, 31, curve output channel two, 32, switch valve five, 33, switch valve six, 34, switch valve seven, 35, switch valve eight, 36, test tube one, 37, test tube two, 38, test tube three, 39, test tube four, 40, test tube five, 41, test tube six, 42, test tube seven, 43, test tube eight, 44, connecting wire one, 45, connecting wire two, 46, connecting wire three, 47, connecting wire four, 48, connecting wire five, 49, connecting wire six, 50, connecting wire seven, 51, connecting wire eight, 52, catheter one, 53, catheter two, 54, catheter three, 55, catheter four, 56, catheter five, 57, catheter six, 58, catheter seven, 59, catheter eight. DETAILED DESCRIPTION
[0025] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.
[0026] like Figure 1-Figure 3As shown, the present invention proposes a grouting durability prediction device for karst areas, including a detection base 5, a microscope 6 is provided at the upper end of the detection base 5, a microfluid pump 2 is provided on one side of the detection base 5, a detection water source storage box 1 is provided on one side of the microfluid pump 2, a microfluid chip 3 is provided on the upper end of the detection base 5, an input liquid isobaric surface 15 is provided in the microfluidic chip 3, a frame cavity 16 is provided in the input liquid isobaric surface 15, the lower end of the frame cavity 16 is connected to one end of the input pipe 14, the other end of the input pipe 14 is connected to the side wall of the water pipe 12, the side wall of the frame cavity 16 is connected to one end of the broken line output channel 17, the other end of the broken line output channel 17 is installed with a switch valve 21, the switch valve 21 One side of the frame cavity 16 is penetrated through one end of the connecting conduit 152, the side wall of the frame cavity 16 is penetrated through one end of the connecting folded line output channel 218, the folded line output channel 218 is arranged on one side of the folded line output channel 17, the other end of the folded line output channel 218 is installed with a switch valve 22, one side of the switch valve 22 is penetrated through one end of the connecting conduit 253, the diameters of the folded line output channel 17 and the folded line output channel 218 are different, the other side wall of the frame cavity 16 is penetrated through one end of the connecting linear output channel 19, the other end of the linear output channel 19 is installed with a switch valve 3 23, one side of the switch valve 3 23 is penetrated through one end of the connecting conduit 3 54, the other side wall of the frame cavity 16 is penetrated through one end of the connecting linear output channel 20, the linear output channel 2 20 is arranged on one side of the linear output channel 19, and the other end of the linear output channel 20 is installed with a switch valve 4 24, one side of the switch valve 4 24 penetrates one end of the connecting conduit 4 55, the diameters of the linear output channel 19 and the linear output channel 20 are different, and the upper end of the detection base 5 is provided with a microfluidic chip 24, and the microfluidic chip 24 is provided with an input liquid isobaric surface 26, and the input liquid isobaric surface 26 is provided with a frame cavity 27, the upper end of the frame cavity 27 penetrates one end of the input channel 25, and the other end of the input channel 25 penetrates and connects to the other side wall of the water delivery pipe 12, and the side wall of the frame cavity 27 penetrates and connects to one end of the curved output channel 1 30, and the other end of the curved output channel 1 30 is installed with a switch valve 7 34, One side of the switch valve seven 34 penetrates one end of the connecting conduit five 56, and the side wall of the frame cavity two 27 penetrates one end of the connecting curve output channel two 31, which is arranged on one side of the curve output channel one 30, and the other end of the curve output channel two 31 is installed with a switch valve eight 35, and one side of the switch valve eight 35 penetrates one end of the connecting conduit six 57, and the tortuosity of the curve output channel one 30 and the curve output channel two 31 is different, and the other side wall of the frame cavity two 27 penetrates one end of the connecting curve output channel one 28, and the other end of the curve output channel one 28 is installed with a switch valve five 32, and one side of the switch valve five 32 penetrates one end of the connecting conduit seven 58, and the other side wall of the frame cavity two 27 penetrates one end of the connecting curve output channel two 29,The curve output channel 29 is arranged on one side of the curve output channel 1 28, and the other end of the curve output channel 29 is installed with a switch valve 6 33, and one side of the switch valve 6 33 passes through one end of the connecting conduit 8 59. The microfluidic chip 24 is arranged on one side of the microfluidic chip 1 3. A test tube rack 1 7 is arranged on the outer wall of the detection base 5, and a test tube 1 36 is arranged in the test tube rack 1 7. A test tube 2 37 is arranged in the test tube rack 1 7. The test tube 2 37 is arranged on one side of the test tube 1 36. The other end of the conduit 1 52 is arranged in the test tube 1 36, and the other end of the conduit 2 53 is arranged in the test tube 2 37. The connection end of the conductivity sensor 1 9 is provided with one end of the connecting wire 1 44, and the other end of the connecting wire 1 44 is arranged in the test tube 1 36. The connection end of the conductivity sensor 1 9 is provided with a connecting wire 1 One end of the connecting wire 2 45 is connected, and the other end of the connecting wire 2 45 is arranged in the test tube 2 37. A test tube 5 40 is arranged in the test tube rack 1 7, and a test tube 6 41 is arranged in the test tube rack 1 7. The test tube 6 41 is arranged on one side of the test tube 5 40. The other end of the conduit 5 56 is arranged in the test tube 5 40, and the other end of the conduit 6 57 is arranged in the test tube 6 41. The connection end of the conductivity sensor 1 9 is provided with one end of the connecting wire 5 48, and the other end of the connecting wire 5 48 is arranged in the test tube 5 40. The connection end of the conductivity sensor 1 9 is provided with one end of the connecting wire 6 49, and the other end of the connecting wire 6 49 is arranged in the test tube 6 41. A test tube rack 2 8 is provided on the other outer wall of the detection base 5, and a test tube 3 38 is arranged in the test tube rack 2 8, and a test tube 4 39 is arranged in the test tube rack 2 8 , the test tube 4 39 is arranged at one side of the test tube 3 38, the other end of the conduit 3 54 is arranged in the test tube 3 38, the other end of the conduit 4 55 is arranged in the test tube 4 39, the connection end of the conductivity sensor 2 10 is provided with one end of the connecting wire 3 46, the other end of the connecting wire 3 46 is arranged in the test tube 3 38, the connection end of the conductivity sensor 2 10 is provided with one end of the connecting wire 4 47, the other end of the connecting wire 4 47 is arranged in the test tube 4 39, the test tube rack 2 8 is provided with a test tube 8 43, the test tube 8 43 is arranged at one side of the test tube 7 42, the connection end of the conductivity sensor 2 10 is provided with one end of the connecting wire 7 50, the other end of the connecting wire 7 50 is arranged in the test tube 7 42, the connection end of the conductivity sensor 2 10 is provided with one end of the connecting wire 7 50, the other end of the connecting wire 7 50 is arranged in the test tube 7 42, the connection end of the conductivity sensor 2 10 is provided with one end of the connecting wire 7 The connecting end is provided with one end of a connecting wire eight 51, and the other end of the connecting wire eight 51 is arranged in a test tube eight 43. A conductivity sensor one 9 is provided on the side wall of a test tube rack one 7, and a conductivity sensor two 10 is provided on the outer wall of a test tube rack two 8. One end of a water pumping pipe 11 is installed at the suction end of the microfluidic pump 2, and the other end of the water pumping pipe 11 is arranged in 1. The output end of the microfluidic pump 2 is penetrated and installed with one end of a water delivery pipe 12, and the other end of the water delivery pipe 12 is penetrated and connected to a microfluidic chip one 3, and the other end of the water delivery pipe 12 is penetrated and connected to a microfluidic chip two 4. A precision control stepping motor 13 is provided on the microfluidic pump 2. The microfluidic chip one 3 and the microfluidic chip one 4 are pre-designed by etching a mold or by 3D printing technology, and grouting is performed on the non-crack area.Wait for the slurry to hydrate and form channels of designed size to simulate the cracks and pores of different karst rocks.
[0027] When in use, a groundwater sample obtained from the karst area is placed in advance in the detection water source storage box 1, and the microfluidic pump 2 is started to transport the groundwater in the detection water source storage box 1 to the microfluidic chip 13 and the microfluidic chip 24 through the pumping pipe 11 and the water delivery pipe 12. The flow rate is controlled by the precision control stepper motor 13. The groundwater enters the frame cavity 16 through the input pipe 14, and flows out from the folded line output channel 17, the folded line output channel 2 18, the straight line output channel 19 and the straight line output channel 20 respectively. The groundwater passing through the folded line output channel 17 flows into the test tube 136 through the conduit 152, and the groundwater passing through the folded line output channel 2 18 flows through the The conduit 2 53 flows into the test tube 2 37, the groundwater through the straight output channel 1 19 flows into the test tube 3 38 through the conduit 3 54, the groundwater through the straight output channel 2 20 flows into the test tube 4 39 through the conduit 4 55, the groundwater enters the frame cavity 2 27 through the input channel 2 25, and flows out from the curved output channel 1 30, the curved output channel 2 31, the switch valve 5 32 and the switch valve 6 33 respectively, the groundwater through the curved output channel 1 30 flows into the test tube 5 40 through the conduit 5 56, the groundwater through the curved output channel 2 31 flows into the test tube 6 41 through the conduit 6 57, the groundwater through the curved output channel 1 28 flows into the test tube 6 41 through the conduit 7 58 The groundwater flows into the test tube seven 42, and flows into the test tube eight 43 through the conduit eight 59 through the curve output channel two. In the initial state, the state of the microfluidic chip one 3 and the microfluidic chip two 4 is photographed through the microscope 6. After a period of time, the microscope 6 is used to take pictures again to compare the internal changes of the microfluidic chip one 3 and the microfluidic chip two 4. The width changes of the broken line output channel one 17, the broken line output channel two 18, the straight line output channel one 19, the straight line output channel two 20, the curved output channel one 30, the curved output channel two 31, the curved output channel one 28 and the curved output channel two 29 are compared through the pictures. By using the conductivity sensor 1-9 measures the calcium ion concentration of the leached solution in test tube 1 36, test tube 2 37, test tube 5 40 and test tube 6 41, and uses conductivity sensor 2 10 to measure the calcium ion concentration of the leached solution in test tube 3 38, test tube 4 39, test tube 7 42 and test tube 8 43, thereby obtaining the calcium ion concentration of groundwater leached in the same microchannel under different flow rate conditions, the calcium ion concentration leached in microchannels of different sizes under the same flow rate conditions, the calcium ion concentration leached in microchannels of the same size under the same flow rate conditions, and the calcium ion concentration leached in microchannels of different tortuosity under the same flow rate conditions. The above is the overall workflow of the present invention, and this step can be repeated the next time it is used.
[0028] It can be seen from the above embodiments that the beneficial effects of the present invention are:
[0029] The settings of microfluidic chip 1 and microfluidic chip 2 can accurately simulate the effects of different flow rates, channel shapes (such as straight lines, broken lines, zigzag lines and curves) and sizes on calcium ion leaching in grouting groundwater, and can more accurately reflect the durability performance of grouting materials in actual karst areas under different conditions; controlling multiple variables (such as flow rate, channel shape, tortuosity) at the same time and measuring the effects of these variables on calcium ion leaching respectively will help to fully understand and predict the life of grouting cement soil; by comparing the changes inside microfluidic chip 1 and microfluidic chip 2 under different conditions and the measurement results of groundwater calcium ion concentration in test tubes, a large amount of detailed and comparable data can be obtained. These data provide a solid foundation for subsequent statistical analysis, model building and prediction; the method of using a microscope to photograph the internal state of microfluidic chip 1 and microfluidic chip 2 can observe its changes without destroying the sample.
[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A grouting durability prediction device for a karst region, comprising a detection base (5), a microscope (6) being provided at the upper end of the detection base (5), a microfluid pump (2) being provided at one side of the detection base (5), and a detection water source storage box (1) being provided at one side of the microfluid pump (2), wherein: The upper end of the detection base (5) is provided with a microfluidic chip 1 (3), the upper end of the detection base (5) is provided with a microfluidic chip 2 (4), the microfluidic chip 2 (4) is arranged on one side of the microfluidic chip 1 (3), the outer wall of the detection base (5) is provided with a test tube rack 1 (7), the other outer wall of the detection base (5) is provided with a test tube rack 2 (8), the side wall of the test tube rack 1 (7) is provided with a conductivity sensor 1 (9), the outer wall of the test tube rack 2 (8) is provided with a conductivity sensor 1 (9), and the outer wall of the test tube rack 2 (8) is provided with a conductivity sensor 1 (10). The microfluidic pump (2) has a second rate sensor (10), one end of a water pump (11) is installed at the suction end of the microfluidic pump (2), the other end of the water pump (11) is arranged in the detection water source storage box (1), the output end of the microfluidic pump (2) is connected to one end of a water delivery pipe (12), the other end of the water delivery pipe (12) is connected to the first microfluidic chip (3), the other end of the water delivery pipe (12) is connected to the second microfluidic chip (4), and a precision control stepping motor (13) is provided on the microfluidic pump (2).
2. The device for predicting the durability of grouting in karst areas according to claim 1, characterized in that: The microfluidic chip (3) is provided with an input liquid isobaric surface (15), and the input liquid isobaric surface (15) is provided with a frame cavity (16). The lower end of the frame cavity (16) is connected to one end of the input pipe (14), and the other end of the input pipe (14) is connected to the side wall of the water pipe (12). The side wall of the frame cavity (16) is connected to one end of the folded line output channel (17). The other end of the folded line output channel (17) is equipped with a switch valve (21). One side of the switch valve (21) is connected to one end of the connecting conduit (52). The side wall of the frame cavity (16) is connected to one end of the folded line output channel (18). The folded line output channel (18) is arranged on one side of the folded line output channel (17). The other end of the folded line output channel (18) is equipped with a switch valve (22). One side of the second (22) penetrates one end of the connecting conduit two (53), the diameters of the folded line output channel one (17) and the folded line output channel two (18) are different, the other side wall of the frame cavity one (16) penetrates one end of the connecting straight line output channel one (19), the other end of the straight line output channel one (19) is installed with a switch valve three (23), one side of the switch valve three (23) penetrates one end of the connecting conduit three (54), the other side wall of the frame cavity one (16) penetrates one end of the connecting conduit two (20), the straight line output channel two (20) is arranged on one side of the straight line output channel one (19), the other end of the straight line output channel two (20) is installed with a switch valve four (24), one side of the switch valve four (24) penetrates one end of the connecting conduit four (55), the diameters of the straight line output channel one (19) and the straight line output channel two (20) are different.
3. The device for predicting the durability of grouting in karst areas according to claim 2, characterized in that: The microfluidic chip 2 (4) is provided with an input liquid isobaric surface 2 (26), and the input liquid isobaric surface 2 (26) is provided with a frame cavity 2 (27). The upper end of the frame cavity 2 (27) is connected to one end of the input channel 2 (25), and the other end of the input channel 2 (25) is connected to the other side wall of the water pipe (12). The side wall of the frame cavity 2 (27) is connected to one end of the curved output channel 1 (30). The other end of the curved output channel 1 (30) is installed with a switch valve 7 (34). One side of the switch valve 7 (34) is connected to one end of the connecting conduit 5 (56). The side wall of the frame cavity 2 (27) is connected to one end of the curved output channel 2 (31). The curved output channel 2 (31) is arranged on one side of the curved output channel 1 (30). The other side of the curved output channel 2 (31) is connected to the other side of the curved output channel 1 (30). A switch valve eight (35) is installed at the end, one side of the switch valve eight (35) penetrates one end of the connecting conduit six (57), the curvilinear output channel one (30) and the curvilinear output channel two (31) have different tortuosity, the other side wall of the frame cavity two (27) penetrates one end of the connecting curvilinear output channel one (28), the other end of the curvilinear output channel one (28) is installed with a switch valve five (32), one side of the switch valve five (32) penetrates one end of the connecting conduit seven (58), the other side wall of the frame cavity two (27) penetrates one end of the connecting curvilinear output channel two (29), the curvilinear output channel two (29) is arranged on one side of the curvilinear output channel one (28), the other end of the curvilinear output channel two (29) is installed with a switch valve six (33), one side of the switch valve six (33) penetrates one end of the connecting conduit eight (59).
4. The device for predicting the durability of grouting in karst areas according to claim 3 is characterized in that: The test tube rack 1 (7) is provided with a test tube 1 (36), the test tube rack 1 (7) is provided with a test tube 2 (37), the test tube 2 (37) is arranged on one side of the test tube 1 (36), the other end of the conduit 1 (52) is arranged in the test tube 1 (36), the other end of the conduit 2 (53) is arranged in the test tube 2 (37), the connection end of the conductivity sensor 1 (9) is provided with one end of a connecting wire 1 (44), the other end of the connecting wire 1 (44) is arranged in the test tube 1 (36), the connection end of the conductivity sensor 1 (9) is provided with one end of a connecting wire 2 (45), the other end of the connecting wire 2 (45) is arranged in the test tube 2 (37), A test tube five (40) is arranged in the test tube rack one (7), a test tube six (41) is arranged in the test tube rack one (7), the test tube six (41) is arranged on one side of the test tube five (40), the other end of the guide tube five (56) is arranged in the test tube five (40), the other end of the guide tube six (57) is arranged in the test tube six (41), the connection end of the conductivity sensor one (9) is provided with one end of a connecting wire five (48), the other end of the connecting wire five (48) is arranged in the test tube five (40), the connection end of the conductivity sensor one (9) is provided with one end of a connecting wire six (49), the other end of the connecting wire six (49) is arranged in the test tube six (41).
5. The device for predicting the durability of grouting in karst areas according to claim 4, characterized in that: The test tube rack 2 (8) is provided with a test tube 3 (38), the test tube rack 2 (8) is provided with a test tube 4 (39), the test tube 4 (39) is arranged on one side of the test tube 3 (38), the other end of the guide tube 3 (54) is arranged in the test tube 3 (38), the other end of the guide tube 4 (55) is arranged in the test tube 4 (39), the connection end of the conductivity sensor 2 (10) is provided with one end of the connecting wire 3 (46), the other end of the connecting wire 3 (46) is arranged in the test tube 3 (38), the connection end of the conductivity sensor 2 (10) is provided with one end of the connecting wire 4 (47), the The other end of the connecting wire four (47) is arranged in the test tube four (39), the test tube rack two (8) is arranged in the test tube seven (42), the test tube rack two (8) is arranged in the test tube eight (43), the test tube eight (43) is arranged on one side of the test tube seven (42), the connection end of the conductivity sensor two (10) is provided with one end of the connecting wire seven (50), the other end of the connecting wire seven (50) is arranged in the test tube seven (42), the connection end of the conductivity sensor two (10) is provided with one end of the connecting wire eight (51), the other end of the connecting wire eight (51) is arranged in the test tube eight (43).
6. A method for using a grouting durability prediction device in a karst area, characterized in that: The device for predicting the durability of grouting in a karst area according to claim 5 comprises the following steps: Step 1: a groundwater sample obtained from a karst area is placed in advance in a test water source storage box (1), and a microfluidic pump (2) is started to transport the groundwater in the test water source storage box (1) to microfluidic chip 1 (3) and microfluidic chip 2 (4) through a pumping pipe (11) and a water delivery pipe (12); Step 2: The flow rate is controlled by a precision-controlled stepper motor (13). The groundwater enters the frame cavity (16) through the input pipe (14) and flows out from the folded output channel (17), the folded output channel (18), the straight output channel (19) and the straight output channel (20). The groundwater passing through the folded output channel (17) flows into the test tube (36) through the conduit (52). The groundwater passing through the folded output channel (18) flows into the test tube (37) through the conduit (53). The groundwater passing through the straight output channel (19) flows into the test tube (38) through the conduit (54). The groundwater passing through the straight output channel (20) flows into the test tube (39) through the conduit (55). (55) flows into test tube four (39), the groundwater enters frame cavity two (27) through input channel two (25), and flows out from curve output channel one (30), curve output channel two (31), switch valve five (32) and switch valve six (33) respectively. The groundwater passing through curve output channel one (30) flows into test tube five (40) through conduit five (56), the groundwater passing through curve output channel two (31) flows into test tube six (41) through conduit six (57), the groundwater passing through curve output channel one (28) flows into test tube seven (42) through conduit seven (58), and the groundwater passing through curve output channel two (29) flows into test tube eight (43) through conduit eight (59); Step 3: In the initial state, the states of the microfluidic chip 1 (3) and the microfluidic chip 2 (4) are photographed through a microscope (6), and after a period of time, photographs are taken again through the microscope (6) to compare the internal changes of the microfluidic chip 1 (3) and the microfluidic chip 2 (4), and the width changes of the broken line output channel 1 (17), the broken line output channel 2 (18), the straight line output channel 1 (19), the straight line output channel 2 (20), the curved line output channel 1 (30), the curved line output channel 2 (31), the curved line output channel 1 (28) and the curved line output channel 2 (29) are compared through the photographs; Step 4: The calcium ion concentration of the leached solution in test tube 1 (36), test tube 2 (37), test tube 5 (40) and test tube 6 (41) is measured by using conductivity sensor 1 (9), and the calcium ion concentration of the leached solution in test tube 3 (38), test tube 4 (39), test tube 7 (42) and test tube 8 (43) is measured by using conductivity sensor 2 (10), thereby obtaining the calcium ion concentration of groundwater leached in the same microchannel under different flow rate conditions, the calcium ion concentration of groundwater leached in microchannels of different sizes under the same flow rate conditions, the calcium ion concentration of groundwater leached in microchannels of the same size under the same flow rate conditions, and the calcium ion concentration of groundwater leached in microchannels of different tortuosity under the same flow rate conditions.