CN114486641A - Magnetic slurry crack grouting and filling experimental device and method - Google Patents
Magnetic slurry crack grouting and filling experimental device and method Download PDFInfo
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- CN114486641A CN114486641A CN202210018782.6A CN202210018782A CN114486641A CN 114486641 A CN114486641 A CN 114486641A CN 202210018782 A CN202210018782 A CN 202210018782A CN 114486641 A CN114486641 A CN 114486641A
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- 239000002002 slurry Substances 0.000 title claims abstract description 67
- 238000011049 filling Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 17
- 238000012800 visualization Methods 0.000 claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000009792 diffusion process Methods 0.000 claims abstract description 16
- 239000011440 grout Substances 0.000 claims abstract description 7
- 238000002474 experimental method Methods 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 238000007569 slipcasting Methods 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 7
- 239000010426 asphalt Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000006247 magnetic powder Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 208000010392 Bone Fractures Diseases 0.000 description 38
- 239000011435 rock Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
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- 239000003292 glue Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 208000007356 Fracture Dislocation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
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Abstract
The invention provides an experimental device and method for magnetic slurry crack grouting and filling, which comprises a steel truss, wherein a crack seepage visualization device and a camera to be tested are carried on the steel truss, the crack seepage visualization device is connected with a bottom grout outlet of a multifunctional pressure grouting tank through a grouting pipe, the top of the multifunctional pressure grouting tank is communicated with a pressure pipe, and the pressure pipe is communicated with an air pump. The method realizes the establishment of the flow track and the filling area rule of the magnetic slurry under the action of different grouting pressures, and establishes a fracture slurry grouting radial diffusion model; slurry proportioning parameters are provided for different forms of fracture grouting repair engineering, the interior of a fracture is better filled, the repair quality is guaranteed, and meanwhile the cost is reduced.
Description
Technical Field
The invention belongs to the technical field of rock crack experiments, and particularly relates to an experimental device and method for magnetic slurry crack grouting and filling.
Background
In recent years, with the continuous development of domestic foundation engineering, the construction scale of various tunnel (cave) engineering is also continuously enlarged, and in geotechnical engineering such as mining, water conservancy and hydropower, tunnel, slope reinforcement and the like, the crack has an important influence on the stability of rock engineering. On one hand, the rock mass crack is one of the important reasons for causing water damage of underground engineering, and on the other hand, the existence of the crack also greatly reduces the strength of the rock mass. The cracks are filled through grouting, so that the engineering water damage can be effectively prevented and controlled, the integrity of surrounding rocks is improved, and the reinforcing effect on broken rock masses is very obvious. In the grouting process, the diffusion rule of the grout in the fracture has decisive and important influence on the water plugging and the surrounding rock reinforcing effect.
Therefore, the research on the diffusion form and influence factors of the slurry in the fracture is greatly needed in the field, and the fracture grouting simulation test under the complex condition is carried out, and the establishment of a fracture grouting radial diffusion model based on the fracture grouting simulation test is an effective research means. The following factors are considered in establishing a fracture grouting radial diffusion model: stress state of the crack, crack deformation and relative shear displacement, crack surface contact area, slurry viscosity, crack opening degree, grouting pressure, crack roughness, crack connectivity, crack groundwater pressure and flow, crack surface opening and the like, various construction factors and the like. The key technology is the realization of test boundary conditions, namely load, displacement boundary conditions and seepage boundary conditions. Due to the limitation of test conditions, particularly in the aspects of confining pressure loading, controllable fracture dislocation, permeation sealing means and visualization realization, the domestic research on rock fracture grouting diffusion tests and test methods under complex conditions has limitations, and related test equipment is relatively lacked.
Disclosure of Invention
In order to solve the technical problems, the invention provides an experimental device and method for magnetic slurry crack grouting and filling, which are used for establishing a rule of flowing tracks and filling areas of magnetic slurry under the action of different grouting pressures and establishing a crack slurry grouting radial diffusion model; slurry proportioning parameters are provided for different forms of fracture grouting repair engineering, the interior of a fracture is better filled, the repair quality is guaranteed, and meanwhile the cost is reduced.
In order to achieve the technical characteristics, the invention aims to realize that: the utility model provides an experimental apparatus of magnetism thick liquid crack slip casting and packing, it includes the steel truss, carry on the crack seepage flow visualization device and the camera that remain to be tested on the steel truss, crack seepage flow visualization device passes through the slip casting pipe and links to each other with the bottom grout outlet that multi-functional pressure slip casting was irritated, the top intercommunication that multi-functional pressure slip casting was irritated has the pressure pipe, the pressure pipe is linked together with the air pump.
The steel truss is a basic component of the experimental device and is made of stainless steel materials; it comprises a base and a camera fixing frame; the base is used for building and placing a fracture seepage visualization device, and the camera fixing frame is used for placing a video camera.
Four corners of the edge of the base are provided with bolt hole positions, and the base is fixed through four long bolts; the inclination angle of the fracture seepage visualization device is changed by adjusting the positions of nuts in the four long bolts, so that magnetic slurry fracture seepage experiments under different inclination angles are realized; before the adjustment, the accuracy of the inclination angle adjusted by the base is ensured by placing the angle measuring instrument on the base.
The fracture seepage visualization device is formed by fixing and bonding two acrylic plates with the same size, two rubber sealing strips used for sealing are arranged between the acrylic plates, and the opening between the acrylic plates is adjusted through the rubber sealing strips, so that the fracture seepage visualization experiment with different openings is realized.
A magnetic rod arrangement hole site is reserved in the fracture seepage visualization device, three grouting holes with the same interval are reserved at a position away from the right side of the magnetic rod by a certain distance, a water injection hole is reserved at the middle position of the opposite side of each grouting hole, and the diameters of the grouting holes and the water injection holes are the same as the radius of the magnetic rod.
The video camera is placed on the camera fixing frame, and the focal length of the video camera can be adjusted, so that the permeation diffusion process of the magnetic slurry can be recorded clearly in an experiment.
The outlet of the air pump is provided with a pressure control valve, the pressure control valve is provided with a pressure digital control table, and the grouting pressure is accurately controlled by adjusting the pressure numerical value of the control table, so that the stability of the grouting pressure is ensured, and the accuracy of the experiment is enhanced.
The multifunctional pressure grouting tank is formed by connecting a plastic hose and an air pump into a whole, so that the air pressure in the multifunctional pressure grouting tank and the air pump is the same; the multifunctional pressure grouting filling device is provided with an air pressure display meter and a grouting control valve, and the pressure condition in the multifunctional pressure grouting filling device is determined by observing the number of the air pressure display meter.
The multifunctional pressure grouting tank is characterized in that magnetic slurry is injected into the multifunctional pressure grouting tank through a funnel at the top end of the multifunctional pressure grouting tank, the magnetic slurry is formed by mixing cement, water, magnetic powder, water-based epoxy resin and asphalt according to a set proportion, and the specific mixing proportion is determined according to experimental requirements.
The experimental method for performing magnetic slurry crack grouting and filling by adopting the experimental device comprises the following steps:
step1. material preparation: the device comprises a steel truss, a base, a camera fixing frame, magnetic slurry, a fracture seepage visualization device, an acrylic plate, a rubber sealing strip, an air pump, a multifunctional pressure grouting tank, a magnetic rod, a video camera and a grouting control valve;
step 2: preparing magnetic slurry: determining the required weight of cement, water, waterborne epoxy resin, magnetic powder and asphalt material according to the proportion of the magnetic slurry, weighing the material with the corresponding weight by adopting an electronic balance, putting the material into a steel cylinder, and fully stirring after switching on a power supply of a stirrer;
step 3: installing a fracture seepage visualization device: placing the magnetic bar in a magnetic bar hole position reserved in the acrylic plate, placing two silica gel gaskets on the other side of the magnetic bar, then placing another acrylic plate to enable the two plates to be superposed, and fixedly bonding the two plates into a whole by adopting a rubber sealing strip;
step 4: adjusting the base: placing an angle measuring instrument on a base, adjusting the positions of nuts in four long bolts at the edge of the base to change the inclination angle of the base, and adjusting the inclination angle of the base to an angle required by an experiment by observing the indication of the angle measuring instrument;
step 5: setting up an experimental device: placing and fixing the fracture seepage visualization device on a base, placing a video camera in a camera fixing frame, and then adjusting the focal length of the video camera to clearly record the seepage diffusion process of the area of the magnetic slurry in an experiment;
step 6: the multifunctional pressure grouting tank is connected into a whole by adopting a plastic hose and an air pump, pressure control valves are arranged at outlets of the air pump and the multifunctional pressure grouting tank, and the valves have pressure digital display meters, so that the grouting pressure can be accurately controlled, and the stability of the pressure is ensured;
step 7: pouring the prepared magnetic slurry into the multifunctional pressure grouting tank, starting an air pump to compress air and a camera switch to adjust the internal air pressure of the multifunctional pressure grouting tank to the experimental air pressure through an adjusting valve, and carrying out experiments;
step 8: and cleaning and installing the experimental fracture seepage visualization device, changing grouting pressure and magnetic rod strength, and repeating the experimental steps.
The invention has the following beneficial effects:
1. the strength of the magnetic bar, the distance between the grouting hole and the magnetic bar, the proportion of the magnetic slurry and the grouting pressure are all variable, and a variable control method is adopted for carrying out related experiments, so that the method is characterized in that: the method comprises the steps of obtaining the influence range index of magnetic rods with different magnetic field strengths on slurry by observing the flowing track and the diffusion area rule of the magnetic slurry under the action of the magnetic rods with different magnetic field strengths, reasonably arranging the magnetic rods in the crack repairing engineering, ensuring the engineering quality and reducing the cost, arranging the tiny magnetic rods or magnetic sheets in the cracks for grouting repair according to the influence range of the magnetic field, avoiding the disturbance of the borehole joint structure, determining the influence parameters of the grouting pressure and the grouting position on the magnetic slurry, and guiding and improving the existing grouting construction process.
2. According to the invention, the grouting rules of magnetic mortar with different consistencies in cracks are obtained through the crack grouting experiment with different opening degrees and roughness, and the grout proportioning parameters are provided for different forms of crack grouting repair engineering, so that the insides of the cracks are fully filled with the grout, and the integrity of the engineering is ensured;
3. the invention adopts the independently researched magnetic slurry to carry out the crack grouting filling research, and aims to: the slurry fluidity is improved, so that the tiny cracks can be better grouted, filled and repaired, the antigravity grouting repair is realized, the dispersion resistance and the drainage capacity of the slurry under water are improved, and the underwater grouting for repairing the cracks is realized;
4. the method utilizes the image self-identification technology of the camera, can capture the rule of the diffusion area of the magnetic slurry of the fracture seepage visual experiment under the action of different magnetic field strengths and different grouting pressures in real time, and is convenient for deep research and analysis of the experiment;
5. according to the invention, the rubber sealing strip is adopted to fixedly bond the acrylic plate, so that the fracture seepage visualization device is convenient to disassemble and install in the experiment process, the effect of sealing glue is achieved, the complex procedure of sealing glue is avoided, and the experiment progress is convenient to implement and accelerate;
6. the fixed base adopted by the invention can flexibly change the inclination angle of the base by adjusting the positions of nuts in four long bolts at the edge of the fixed base, and meanwhile, the inclination angle of the fixed base is measured by adopting an angle measuring instrument, so that the accuracy of the experiment is improved, and fracture seepage visual experiments under different inclination angles are realized;
7. the invention provides grouting pressure through the air pump, thus ensuring the stability of the grouting pressure; meanwhile, a pressure control valve is arranged at the outlet of the grouting device, and the grouting pressure can be accurately controlled by adjusting the numerical value of a digital display meter of the pressure control valve;
8. the multifunctional pressure grouting tank adopts the plastic hose to be connected with the air pump, so that the internal pressure of the multifunctional pressure grouting tank is ensured to be the same as the grouting pressure set by the air pump, and the accuracy of an experiment is ensured; meanwhile, the multifunctional pressure grouting is convenient for grouting and cleaning, and the experimental workload is reduced;
9. the method is simple to operate, low in cost and wide in practical significance and application prospect in crack repairing engineering.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic view of the overall apparatus of the present invention.
FIG. 2 is a schematic view of a fracture seepage visualization device according to the present invention.
FIG. 3 is a schematic cross-sectional view of a fracture seepage visualization device according to the present invention.
In the figure: the device comprises a steel truss 1, a base 2, a camera fixing frame 3, magnetic slurry 4, a fracture seepage visualization device 5, an acrylic plate 6, a rubber sealing strip 7, an air pump 8, a multifunctional pressure grouting tank 9, a magnetic rod 10, a video camera and a valve 12.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-3, an experimental device for magnetic slurry crack grouting and filling comprises a steel truss 1, wherein a crack seepage visualization device 5 and a camera to be tested are carried on the steel truss 1, the crack seepage visualization device 5 is connected with a bottom grout outlet of a multifunctional pressure grouting tank 9 through a grouting pipe, the top of the multifunctional pressure grouting tank 9 is communicated with a pressure pipe, and the pressure pipe is communicated with an air pump 8. By the experimental device, the flow track and filling area rule of the magnetic slurry under the action of different grouting pressures are established, and a fracture slurry grouting radial diffusion model is established; slurry proportioning parameters are provided for different forms of fracture grouting repair engineering, the interior of a fracture is better filled, the repair quality is guaranteed, and meanwhile the cost is reduced.
Further, the steel truss 1 is a basic component of the experimental device and is made of stainless steel materials; it comprises a base 2 and a camera fixing frame 3; the base 2 is used for building and placing a fracture seepage visualization device 5, and the camera fixing frame 3 is used for placing a camera. Adopt stainless steel material, alleviate device weight when guaranteeing the truss quality, the going on of convenient experiment.
Further, four corners of the edge of the base 2 are provided with bolt hole sites, and the base 2 is fixed through four long bolts; the inclination angle of the fracture seepage visualization device 5 is changed by adjusting the positions of nuts in the four long bolts, so that magnetic slurry fracture seepage experiments under different inclination angles are realized; before the adjustment, the accuracy of the inclination angle adjusted by the base 2 is ensured by placing the angle measuring instrument on the base 2.
Further, the fracture seepage visualization device 5 is formed by two acrylic plates 6 with the same size through fixed bonding, and is provided with a rubber sealing strip 7 used for sealing between the acrylic plates 6, and adjusts the opening between the acrylic plates 6 through the rubber sealing strip 7, so as to realize the visualization experiment of the fracture seepage with different openings. The rubber sealing strip 7 realizes the bonding and fixing between the two acrylic plates 6.
Furthermore, a magnetic rod 10 is reserved in the fracture seepage visualization device 5 to arrange hole sites, three grouting holes with the same interval are reserved at a position away from the right side of the magnetic rod 10 by a certain distance, a water injection hole is reserved at the middle position of the opposite side of the grouting holes, and the hole diameters of the grouting holes and the water injection hole are the same as the radius of the magnetic rod. The magnetic rod 10 can be used to control the penetration process of the magnetic slurry 4.
Further, the camera is placed on the camera fixing frame 3, and the focal length of the camera can be adjusted, so that the penetration and diffusion processes of the magnetic slurry 4 can be clearly recorded in an experiment. And further researching the change process of the seepage of the corresponding magnetic slurry 4 in the fractures with different opening degrees.
Furthermore, a pressure control valve is arranged at the outlet of the air pump 8, a pressure digital control table is arranged in the pressure control valve, and the grouting pressure is accurately controlled by adjusting the pressure value of the control table, so that the stability of the grouting pressure is ensured, and the accuracy of the experiment is enhanced.
Further, the multifunctional pressure grouting tank 9 is connected with the air pump 8 into a whole by adopting a plastic hose, so that the air pressure in the multifunctional pressure grouting tank and the air pump is the same; the multifunctional pressure grouting device 9 is provided with an air pressure display meter and a grouting control valve 12, and the pressure condition in the multifunctional pressure grouting device is determined by observing the number of the air pressure display meter.
Furthermore, magnetic slurry 4 is injected into the multifunctional pressure grouting tank 9 through a funnel at the top end of the multifunctional pressure grouting tank, the magnetic slurry 4 is formed by mixing cement, water, magnetic powder, water-based epoxy resin and asphalt according to a set proportion, and the specific proportion is determined according to experimental requirements.
Example 2:
the experimental method for performing magnetic slurry crack grouting and filling by adopting the experimental device comprises the following steps:
step1. material preparation: the device comprises a steel truss 1, a base 2, a camera fixing frame 3, magnetic slurry 4, a fracture seepage visualization device 5, an acrylic plate 6, a rubber sealing strip 7, an air pump 8, a multifunctional pressure grouting tank 9, a magnetic rod 10, a video camera and a grouting control valve 12;
step 2: preparation of magnetic slurry 4: determining the required weight of cement, water, waterborne epoxy resin, magnetic powder and asphalt material according to the proportion of the magnetic slurry 4, weighing the material with the corresponding weight by adopting an electronic balance, putting the material into a steel cylinder, and fully stirring after switching on a power supply of a stirrer;
step 3: installing a fracture seepage visualization device 5: placing the magnetic rod 10 in a magnetic rod hole position reserved in the acrylic plate 6 and placing two silica gel gaskets on the other side, then placing another acrylic plate to enable the two plates to be superposed, and fixedly bonding the two plates into a whole by adopting a rubber sealing strip 7;
step 4: adjusting the base 2: placing an angle measuring instrument on a base, adjusting the positions of nuts in four long bolts at the edge of the base to change the inclination angle of the base 2, and adjusting the inclination angle of the base to an angle required by an experiment by observing the readings of the angle measuring instrument;
step 5: setting up an experimental device: placing and fixing the fracture seepage visualization device 5 on a base, placing a video camera in a camera fixing frame 3, and then adjusting the focal length of the video camera to clearly record the seepage diffusion process of the area of the magnetic slurry in an experiment;
step 6: the multifunctional pressure grouting tank is connected with an air pump 8 into a whole by adopting a plastic hose, pressure control valves are arranged at outlets of the air pump 8 and the multifunctional pressure grouting tank 9, and the valves have pressure digital display meters, so that the grouting pressure can be accurately controlled, and the pressure stability is ensured;
step 7: pouring the prepared magnetic slurry 4 into the multifunctional pressure grouting tank 9, starting an air pump 8 to compress air and starting a camera switch to adjust the internal air pressure of the multifunctional pressure grouting tank to the experimental air pressure through an adjusting valve, and carrying out experiments;
step 8: and cleaning and installing the experimental fracture seepage visualization device, changing grouting pressure and strength of the magnetic rod 10, and repeating the experimental steps.
Claims (10)
1. The utility model provides an experimental apparatus of magnetic slurry crack slip casting and packing which characterized in that: it includes steel truss (1), carry on fracture seepage flow visualization device (5) and the camera that awaits the experiment on steel truss (1), fracture seepage flow visualization device (5) link to each other through the bottom grout outlet of slip casting pipe with multi-functional pressure slip casting (9), the top intercommunication of multi-functional pressure slip casting (9) has the manometer pipe, the manometer pipe is linked together with air pump (8).
2. The magnetic slurry crack grouting and filling experimental device according to claim 1, characterized in that: the steel truss (1) is a basic component of the experimental device and is made of stainless steel materials; it comprises a base (2) and a camera fixing frame (3); the base (2) is used for building and placing a fracture seepage visualization device (5), and the camera fixing frame (3) is used for placing a video camera.
3. The magnetic slurry crack grouting and filling experimental device according to claim 2, characterized in that: four corners of the edge of the base (2) are provided with bolt hole positions, and the base (2) is fixed through four long bolts; the inclination angle of the fracture seepage visualization device (5) is changed by adjusting the positions of nuts in the four long bolts, so that magnetic slurry fracture seepage experiments under different inclination angles are realized; before the adjustment, the accuracy of the inclination angle adjusted by the base (2) is ensured by placing the angle measuring instrument on the base (2).
4. The magnetic slurry crack grouting and filling experimental device according to claim 1, characterized in that: fracture seepage visual device (5) are formed by two fixed bonds of the same ya keli board of size (6), two be provided with between ya keli board (6) and be used for sealed rubber sealing strip (7) to adjust the aperture between ya keli board (6) through rubber sealing strip (7), and then realize the visual experiment of different aperture fracture seepage.
5. The magnetic slurry crack grouting and filling experimental device according to claim 4, characterized in that: a magnetic rod (10) is reserved in the fracture seepage visualization device (5) to arrange hole sites, three grouting holes with the same interval are reserved at a position away from the right side of the magnetic rod (10) by a certain distance, a water injection hole is reserved at the middle position of the opposite side of each grouting hole, and the diameters of the grouting holes and the water injection holes are the same as the radius of the magnetic rod.
6. The magnetic slurry crack grouting and filling experimental device according to claim 1, characterized in that: the video camera is placed on the camera fixing frame (3) and can adjust the focal length of the video camera, so that the penetration diffusion process of the magnetic slurry (4) can be clearly recorded in an experiment.
7. The magnetic slurry crack grouting and filling experimental device according to claim 1, characterized in that: the outlet of the air pump (8) is provided with a pressure control valve, the pressure control valve is provided with a pressure digital control table, and the grouting pressure is accurately controlled by adjusting the pressure numerical value of the control table, so that the stability of the grouting pressure is ensured, and the accuracy of the experiment is enhanced.
8. The magnetic slurry crack grouting and filling experimental device according to claim 1, characterized in that: the multifunctional pressure grouting tank (9) is connected with the air pump (8) into a whole by adopting a plastic hose, so that the air pressure in the multifunctional pressure grouting tank and the air pump is the same; the multifunctional pressure grouting device (9) is provided with an air pressure display meter and a grouting control valve (12), and the pressure condition in the multifunctional pressure grouting device is determined by observing the number of the air pressure display meter.
9. The magnetic slurry crack grouting and filling experimental device according to claim 1, characterized in that: the multifunctional pressure grouting tank (9) is internally filled with magnetic slurry (4) through a funnel at the top end of the multifunctional pressure grouting tank, the magnetic slurry (4) is formed by mixing cement, water, magnetic powder, water-based epoxy resin and asphalt according to a set proportion, and the specific mixing proportion is determined according to experimental requirements.
10. An experimental method for grouting and filling a magnetic slurry crack by using the experimental device as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
step1. material preparation: the device comprises a steel truss (1), a base (2), a camera fixing frame (3), magnetic slurry (4), a fracture seepage visualization device (5), an acrylic plate (6), a rubber sealing strip (7), an air pump (8), a multifunctional pressure grouting tank (9), a magnetic rod (10), a video camera and a grouting control valve (12);
step 2: magnetic slurry (4) was prepared: determining the required weight of cement, water, waterborne epoxy resin, magnetic powder and asphalt material according to the proportion of the magnetic slurry (4), weighing the material with the corresponding weight by adopting an electronic balance, putting the material into a steel cylinder, and fully stirring after switching on a power supply of a stirrer;
step 3: installing a fracture seepage visualization device (5): the magnetic rod (10) is placed in a magnetic rod hole reserved in the acrylic plate (6), two silica gel gaskets are placed on the other side of the magnetic rod hole, then the other acrylic plate is placed to enable the two plates to be overlapped, and the two plates are fixedly bonded into a whole by adopting a rubber sealing strip (7);
step 4: adjusting the base (2): the angle measuring instrument is placed on the base, the positions of nuts in four long bolts at the edge of the base are adjusted to change the inclination angle of the base (2), and the inclination angle of the base is adjusted to the angle required by the experiment by observing the readings of the angle measuring instrument;
step 5: setting up an experimental device: placing and fixing the fracture seepage visualization device (5) on a base, placing a video camera in a camera fixing frame (3), and then adjusting the focal length of the video camera to clearly record the seepage diffusion process of the area of the magnetic slurry in an experiment;
step 6: the multifunctional pressure grouting tank is connected into a whole by adopting a plastic hose and an air pump (8), pressure control valves are arranged at outlets of the air pump (8) and the multifunctional pressure grouting tank (9), and the valves have pressure digital display meters, so that the grouting pressure can be accurately controlled, and the stability of the pressure is ensured;
step 7: pouring the prepared magnetic slurry (4) into the multifunctional pressure grouting tank (9), starting an air pump (8) to compress air and a camera switch to adjust the internal air pressure of the multifunctional pressure grouting tank to the experimental air pressure through an adjusting valve, and carrying out an experiment;
step 8: and cleaning and installing the experimental fracture seepage visualization device, changing grouting pressure and strength of the magnetic rod (10), and repeating the experimental steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210018782.6A CN114486641A (en) | 2022-01-09 | 2022-01-09 | Magnetic slurry crack grouting and filling experimental device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210018782.6A CN114486641A (en) | 2022-01-09 | 2022-01-09 | Magnetic slurry crack grouting and filling experimental device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878434A (en) * | 2022-05-20 | 2022-08-09 | 河南理工大学 | Single-crack grouting seepage visual test method with variable width and roughness |
| CN115165699A (en) * | 2022-06-08 | 2022-10-11 | 三峡大学 | Device and method for visually measuring seepage effect of magnetic mortar in rock fracture plugging at multiple angles |
| CN115478570A (en) * | 2022-09-16 | 2022-12-16 | 三峡大学 | Visual experiment device and method for simulating grouting effect of impervious curtain |
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- 2022-01-09 CN CN202210018782.6A patent/CN114486641A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878434A (en) * | 2022-05-20 | 2022-08-09 | 河南理工大学 | Single-crack grouting seepage visual test method with variable width and roughness |
| CN115165699A (en) * | 2022-06-08 | 2022-10-11 | 三峡大学 | Device and method for visually measuring seepage effect of magnetic mortar in rock fracture plugging at multiple angles |
| CN115165699B (en) * | 2022-06-08 | 2023-08-25 | 三峡大学 | Device and method for multi-angle visual measurement of magnetic mortar plugging rock crack seepage effect |
| CN115478570A (en) * | 2022-09-16 | 2022-12-16 | 三峡大学 | Visual experiment device and method for simulating grouting effect of impervious curtain |
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