CN109283097B - Visual variable-opening-degree crack grouting test device and method under static water and dynamic water conditions - Google Patents
Visual variable-opening-degree crack grouting test device and method under static water and dynamic water conditions Download PDFInfo
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- CN109283097B CN109283097B CN201811209360.7A CN201811209360A CN109283097B CN 109283097 B CN109283097 B CN 109283097B CN 201811209360 A CN201811209360 A CN 201811209360A CN 109283097 B CN109283097 B CN 109283097B
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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
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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
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The invention discloses a visual variable-opening-degree crack grouting test device under the conditions of still water and flowing water and a using method thereof. The grouting test platform comprises a crack upper disc surface, a crack lower disc surface, a crack opening adjusting block, a sealing rubber ring and a water storage box. The components of the grouting test platform are connected through bolts, and the water supply device is connected with the grouting test platform in series through a connecting pipeline. The upper and lower disk surfaces of the crack of the grouting test platform are made of toughened glass, the sizes of the upper and lower disk surfaces of the crack are completely the same, and a grouting hole and a sensor arrangement hole site are reserved on the upper disk surface of the crack. The crack opening adjusting blocks are used for adjusting the size of the crack opening and are respectively placed on four corners of the upper disc surface and the lower disc surface of the crack. The sealing rubber ring and the water storage box are fixed on the side surfaces of the upper disc surface and the lower disc surface of the crack through bolts. The connecting pipeline consists of a steel wire pipe, a water inflow regulating valve, a switching valve and a flowmeter. The steel wire pipe is respectively connected with the water storage box and the flowmeter and is connected to the water tank through the switching valve.
Description
Technical Field
The invention relates to a crack grouting test device used under the conditions of still water and flowing water, in particular to a test device capable of realizing crack permeation grouting under the conditions of still water and flowing water and a using method. The method is suitable for simulating hydrostatic grouting in a plane radial flow diffusion mode and hydrodynamic grouting in a U-shaped diffusion mode.
Background
The grouting technology is a common means for effectively solving the problem of water disaster in underground engineering. The grouting technology has remarkable advantages especially for water burst disasters occurring in the underground engineering construction process and lining leakage water disasters occurring in the operation period. The crack grouting model test device has the advantages of strong practicability, multiple working condition simulation types and simple and convenient acquisition of test parameters, and becomes an essential tool for the theoretical research of grouting water shutoff. Although research and development work is carried out by a large number of experts in the aspects of fracture grouting simulation test platforms and systems, the following problems still exist:
(1) limited by the design size, certain boundary effect exists, and the grouting diffusion rule including the change of grouting pressure after slurry and water mixing, slurry pressure attenuation and the like when the slurry diffuses in a plane radial flow mode under the still water condition cannot be researched.
(2) The simulation working condition is single, the simulation of the slurry under various working conditions such as different fracture opening degrees, hydrostatic pressure, flowing water flow rate and the like cannot be met, and the migration, deposition and infiltration rules of the slurry under corresponding working conditions cannot be obtained.
(3) The cracks are all composed of smooth parallel plates, the number of monitoring points is small, and the information of the whole flow field and the pressure field of the slurry cannot be acquired.
In conclusion, the crack grouting model test device capable of simulating various working conditions such as crack opening degree, hydrostatic pressure, flowing water flow rate and the like is researched and developed, and has great significance for promoting the development of crack grouting theory.
Disclosure of Invention
The invention provides a visual variable-opening-degree crack grouting test device and a test method thereof under the conditions of still water and moving water. The system can realize the grouting simulation of the grout in a plane radial flow mode in a still water fracture and the grouting simulation in a U-shaped diffusion mode in a flowing water fracture. Meanwhile, the crack platform part of the test device can accurately adjust the crack opening.
In order to achieve the purpose, the invention adopts the following technical scheme:
a visual variable-opening-degree crack grouting test device under the conditions of still water and flowing water comprises a grouting test platform, a data acquisition device, a water supply device and a connecting pipeline;
the grouting test platform comprises a crack upper plate, a crack lower plate, a crack opening adjusting block, a sealing rubber ring and a water storage box; the fracture upper plate and the fracture lower plate are completely identical in shape and size and are arranged in an up-down symmetrical mode, gaps are formed between the fracture upper plate and the fracture lower plate, the fracture opening adjusting blocks are located at four corners of the fracture upper plate and the fracture lower plate, the sealing rubber rings are used for sealing the gaps around the fracture upper plate, the fracture lower plate and the fracture opening adjusting blocks, the four side faces of the structure after the fracture upper plate and the fracture lower plate are combined are respectively provided with the water storage box, the water storage boxes are connected with the water supply device through connecting pipelines, and the upper portion of the fracture upper plate is provided with the data acquisition device and the grouting hole site.
The upper and lower disc surfaces of the crack of the grouting test platform are made of toughened glass, the sizes of the upper and lower disc surfaces of the crack are completely the same and are all squares of 200cm multiplied by 5cm, so that the slurry is ensured to have enough diffusion space.
Furthermore, the grouting hole is reserved at the center of the crack upper disc.
Furthermore, the data acquisition device comprises a pressure transmitter and a flow velocity sensor, and the crack upper disc reserved sensor is provided with a hole position for connecting the pressure transmitter and the flow velocity sensor, so that pressure field data in the slurry diffusion process can be conveniently acquired.
Furthermore, the sensor arrangement hole sites are symmetrically distributed about the side length central line of the square fracture plate.
Furthermore, threaded holes are formed in four side faces of the upper disc and the lower disc of the crack and are used as hole sites for fixing the water storage box and the sealing rubber ring.
Further, the crack opening adjusting block is a cuboid, wherein h represents the height of the crack opening adjusting block. (ii) a The fracture opening adjusting blocks are multiple in number, each group is four, and the length, the width and the height of each group of fracture opening adjusting blocks are the same. The different groups of fracture opening adjusting blocks have changes in height.
Furthermore, the crack opening adjusting block is used for adjusting the opening size of the crack. Four fracture opening adjusting blocks are arranged at four corners of the fracture disk respectively. When the crack opening adjusting block is placed, two side surfaces of the crack opening adjusting block and two side surfaces of the crack disc are kept on the same plane as much as possible. The adjustment of the crack opening degree is realized by replacing the crack opening degree adjusting blocks with different heights.
Further, the sealing rubber ring is a rectangular annular rubber ring. The sealing rubber rings are four in number, hole sites are reserved on four corners of each sealing rubber ring, and the sealing rubber rings are fixed on four side faces of the upper and lower plates of the crack through bolts.
Further, the water storage box is a cuboid, and a cutting groove is formed in the inner side of the cuboid; the total of four water storage boxes are provided, and the center of each water storage box is provided with an opening for connecting a water supply device pipeline. The four corners of the water storage box are provided with holes, and the water storage box can be fixed on the upper and lower plates of the crack through bolts.
The water supply device is composed of a bracket and a water tank. The height of the bracket can be freely adjusted, and the water tank is arranged on the bracket. The simulation of different hydrostatic pressures and flowing water flow rates is realized by adjusting the height of the support. Four sets of water supply devices are connected to four sides of the grouting test bed through connecting pipelines respectively.
The connecting pipeline consists of a steel wire pipe, a water inflow regulating valve, a switching valve and a flowmeter. The steel wire pipe is respectively connected with the water storage box and the flowmeter and is connected to the water tank through the switching valve. The flow of water entering the crack is controlled by the water inflow regulating valve and the flowmeter together, so that the simulation of two water conservancy conditions is realized.
The method for carrying out the test by using the visual variable-opening-degree crack grouting test device under the static water and flowing water conditions comprises the following specific steps:
selecting a proper fracture opening adjusting block according to the fracture opening to be simulated; placing the crack opening adjusting block on the crack lower disc, then placing the crack upper disc on the crack opening adjusting block, and ensuring that the side surfaces of the crack upper disc and the crack lower disc and the side surface of the crack opening adjusting block are on the same horizontal plane during placement;
tightly attaching a sealing rubber ring to the side surfaces of the upper disc and the lower disc of the crack, and tightly attaching a water storage box to the sealing rubber ring;
the bolt penetrates through the water storage box and the sealing rubber ring and then is fixed on a reserved hole position on the side surface of the upper and lower discs of the crack;
the steel wire pipe is respectively connected with the water storage box and the flowmeter and is connected to the water tank through the switching valve; mounting the water tank on the bracket; and connecting the grouting pipeline to the inside of a grouting hole reserved in the fracture upper disc, and closing a grouting valve of the grouting pipe. And (3) installing the flow rate and pressure sensor in a preformed hole of the upper disc of the fracture, and opening flow rate and pressure monitoring software to prepare for monitoring.
When crack grouting is carried out under the condition of simulating still water, firstly, the four water inflow adjusting valves are completely closed, the four water tanks are filled with water, and the volume of the water in the four water tanks is kept the same. Secondly, opening four water inflow control valves to enable the water storage box and the upper and lower plates of the crack to be filled with water; adjusting the height of the support, and monitoring feedback data through a pressure sensor to determine whether hydrostatic pressure meets the conditions; opening a grouting pipeline grout inlet valve to start grouting after the hydrostatic pressure reaches a condition;
when crack grouting is carried out under the condition of simulating flowing water, four water inflow control valves are closed, only one water tank is filled with water, and the other three water tanks are not filled with water; the water inlet regulating valves of the water filling water tanks and the water tanks opposite to the water filling water tanks are opened, and the water inlet regulating valves of the other two water tanks are closed. Regulating the water inflow through the monitoring data of the flow meter to enable the water to reach a preset flow rate; and opening a slurry inlet valve for grouting when the flowing water flow velocity meets the condition.
The invention has the beneficial effects that:
1. the length multiplied by the width of the test device is 2m multiplied by 2m, the simulation of the slurry in a plane radial flow diffusion mode can be completely realized, and the limitation to the slurry diffusion path caused by the difference of the length and the width of the test platform in the prior art is overcome.
2. The test device can realize the crack grouting simulation of two kinds of water conservancy of flowing water and still water, has improved test platform's availability factor.
3. The fracture hanging disc is made of organic toughened glass, the whole slurry diffusion process is visual, and the slurry diffusion form is convenient to observe.
4. The test device has a plurality of monitoring hole sites, and can realize real-time accurate monitoring of the whole slurry flow field and the slurry pressure field.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a general schematic of the present invention;
FIG. 2 shows a water storage box and a sealing rubber ring;
FIG. 3 shows the crack upper and lower plates and the crack opening adjusting block;
FIG. 4 is a schematic diagram of the arrangement of the pressure sensor and the flow rate sensor;
wherein: 1-crack upper disc, 2-crack lower disc, 3-crack opening adjusting block, 4-sealing rubber ring, 5-water storage box, 6-bolt, 7-steel wire pipe, 8-pressure sensor, 9-flow velocity sensor, 10-crack upper and lower disc side threaded hole, 11-bracket, 12-water tank, 13-water inflow adjusting valve, 14-flowmeter, 15-switching valve, 16-bracket, 17-grouting pipeline and 18-grouting valve.
The specific implementation mode is as follows:
it should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure herein. Unless defined otherwise, all technical and scientific languages used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and further it is to be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components and/or combinations thereof.
The present invention is further illustrated by the following specific examples, which are provided for the purpose of illustration only and are not intended to be limiting.
As shown in fig. 1-4, the visual variable-opening-degree fracture grouting test device under the static water and flowing water conditions and the use method thereof comprise a fracture upper plate 1, a fracture lower plate 2, a fracture opening adjusting block 2, a sealing rubber ring 4, a water storage box 5, a bolt 6, a steel wire pipe 7, a pressure sensor 8, a flow velocity sensor 9, fracture upper and lower plate side threaded holes 10, a support 11, a water tank 12, a water inflow adjusting valve 13, a flow meter 14, a switching valve 15, a support 16, a grouting pipeline 17 and a grouting valve 18.
The upper and lower plates of the crack are made of toughened glass, and the sizes of the upper and lower plates of the crack are completely the same and are both squares of 200cm multiplied by 5 cm; the upper and lower plates of the crack are arranged up and down, and the periphery of the crack is combined with the crack opening adjusting block after being sealed by the sealing ring to form the crack.
A grouting hole is reserved in the center of the fracture upper plate 1, and sensor laying holes are reserved in other positions and used for connecting a pressure transmitter and a flow velocity sensor. The sensor arrangement hole sites reserved on the fracture upper disk are symmetrically distributed about the side length central line of the square fracture disk.
And threaded holes are formed in the four side surfaces of the upper disc and the lower disc of the crack and are used as hole sites for fixing the water storage box and the sealing rubber ring.
The crack opening adjusting block is a cuboid with the size of 10cm multiplied by hcm, wherein h represents the height of the crack opening adjusting block. The total number of the fracture opening adjusting blocks is 10, each group is four, and the length, the width and the height of each group of the fracture opening adjusting blocks are the same. The height of the different groups of fracture opening adjusting blocks is changed, and the sizes of the 10 groups of fracture opening adjusting blocks in the height direction are respectively 1mm, 2mm, 3mm and 10 mm.
The crack opening adjusting block is used for adjusting the opening size of the crack. Four fracture opening adjusting blocks are arranged at four corners of the fracture disk respectively. When the crack opening adjusting block is placed, two side surfaces of the crack opening adjusting block and two side surfaces of the crack disc are kept on the same plane as much as possible. The adjustment of the crack opening degree is realized by replacing the crack opening degree adjusting blocks with different heights.
The sealing rubber ring is a rectangular annular rubber ring with the thickness of 200cm multiplied by 7cm multiplied by 1 cm. The sealing rubber rings are four in number, hole sites are reserved on four corners of each sealing rubber ring, and the sealing rubber rings are fixed on bolt holes in four side faces of the upper and lower plates of the crack through bolts.
The water storage box is a cuboid of 200cm multiplied by 7cm multiplied by 1cm, and a cutting groove is arranged on the inner side of the cuboid. The number of the water storage boxes is four, and an opening is reserved in the center of each water storage box and is used for connecting a water supply device pipeline and supplying water into the crack; the four corners of the water storage box are provided with holes, and the water storage box can be fixed on the upper disc and the lower disc of the crack through bolts.
The water supply device is composed of a bracket and a water tank. The height of the bracket can be freely adjusted, and the water tank is arranged on the bracket. The simulation of different hydrostatic pressures and flowing water flow rates is realized by adjusting the height of the support. Four sets of water supply devices are connected to four sides of the grouting test bed through connecting pipelines respectively.
The connecting pipeline consists of a steel wire pipe, a water inflow regulating valve, a switching valve and a flowmeter. The steel wire pipe is respectively connected with the water storage box and the flowmeter and is connected to the water tank through the switching valve. The flow of water entering the crack is controlled by the water inflow regulating valve and the flowmeter together, so that the simulation of two water conservancy conditions is realized.
The specific installation mode is as follows:
the crack opening adjusting block 3 is arranged on the crack lower disc 2, the crack upper disc 1 is arranged on the crack opening adjusting block 3, the sealing rubber ring 4 is tightly attached to the crack upper disc 1 and the crack lower disc 2, and the water storage box 5 is tightly attached to the sealing rubber ring 4. The sealing rubber ring 4 and the water storage box 5 are fixed in the hole positions of the side threaded holes 10 reserved in the crack upper plate 1 and the crack lower plate 2 through bolts. The steel wire pipe 7 is connected with the central hole position of the water storage box 5 and the flowmeter 14 in series in sequence, and is connected to the water tank 12 after passing through the switching valve 15. The water tank 12 is mounted on a bracket 16. And a grouting pipeline 17 is arranged in the reserved hole position for central grouting of the fracture upper disc 1, and a grout inlet valve 18 is closed. The pressure sensor 8 and the flow velocity sensor 9 are arranged in the reserved hole position of the fracture upper disc 1.
The method for simulating fracture grouting under the static water condition and the dynamic water condition by adopting the test device comprises the following specific steps:
and selecting a proper fracture opening adjusting block 3 according to the fracture opening to be simulated. 3 pieces of crack opening degree adjusting blocks are placed on the crack lower plate 2, then the crack upper plate 1 is placed on the crack opening degree adjusting blocks 3, and when the crack upper plate and the crack lower plate are placed, the side faces of the crack upper plate and the crack lower plate 2 and the side faces of the crack opening degree adjusting blocks 3 are on the same horizontal plane. The sealing rubber ring 4 is tightly attached to the side surfaces of the upper and lower plates 2 of the crack, and the water storage box 5 is tightly attached to the sealing rubber ring 4. The bolt 6 is fixed in the reserved hole sites on the lateral surfaces of the fracture upper disc 1 and the fracture lower disc 2 after penetrating through the water storage box 5 and the sealing rubber ring 4. The steel wire pipe 7 is respectively connected with the water storage box 5 and the flowmeter 14 and is connected to the water tank 12 after passing through the switching valve 15. The water tank 12 is mounted on the bracket 11. Connecting the grouting pipeline 17 into a grouting hole reserved in the fracture upper disc 1, and closing a grout inlet valve 18 of the grouting pipeline 17. And (3) installing a flow velocity sensor 9 and a pressure sensor 8 in a preformed hole of the fracture upper disc 1, and opening flow velocity and pressure monitoring software to prepare for monitoring. When crack grouting is performed under the simulated still water condition, firstly, the four water inflow regulating valves 13 are completely closed, the four water tanks 12 are filled with water, and the volume of the water in the four water tanks 12 is kept the same. And secondly, opening the four water inflow control valves 13 to enable the water storage box 5, the crack upper plate 1 and the crack lower plate 2 to be filled with water. The height of the bracket 11 is adjusted, and whether the hydrostatic pressure meets the condition or not is determined by monitoring feedback data through the pressure sensor 9. After the hydrostatic pressure reaches the condition, the grouting pipeline slurry inlet valve 18 is opened to start grouting. When crack grouting under the condition of simulating flowing water is performed, four water inflow control valves 13 are closed, only one water tank 12 is filled with water, and the other three water tanks are not filled with water. The inlet regulating valve 13 connected to the water-filled tank 12 and the inlet regulating valve 13 of the tank 12 opposite thereto are opened, and the inlet regulating valves 13 of the other two tanks 12 are closed. The flow meter 14 monitors the data to adjust the water intake to a preset flow rate. When the flowing water flow rate meets the condition, the slurry inlet valve 18 is opened to start grouting.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. A method for carrying out grouting test based on a visual variable-opening-degree crack grouting test device under the conditions of still water and flowing water is characterized in that the test device comprises a grouting test platform, a data acquisition device, a water supply device and a connecting pipeline;
the grouting test platform comprises a crack upper plate, a crack lower plate, a crack opening adjusting block, a sealing rubber ring and a water storage box; the shape and the size of the upper fracture plate and the lower fracture plate are completely the same, the upper fracture plate and the lower fracture plate are arranged in an up-down symmetrical mode, gaps are formed between the upper fracture plate and the lower fracture plate, the fracture opening adjusting blocks are located at four corners of the upper fracture plate and the lower fracture plate, the sealing rubber rings are used for sealing the gaps around the upper fracture plate, the lower fracture plate and the fracture opening adjusting blocks, four water storage boxes are respectively arranged on four side faces of the combined structure of the upper fracture plate and the lower fracture plate, the number of the water storage boxes is four, an opening is reserved in the center of each water storage box, and the opening is used for being connected with a water supply device pipeline; the upper part of the crack upper disc is provided with a data acquisition device and a grouting hole position, and the flow of water entering the crack is controlled by a water inflow regulating valve and a flowmeter of a connecting pipeline together, so that the simulation of two water conservancy conditions is realized;
the water supply device consists of a bracket and a water tank; the height of the bracket can be freely adjusted, and the water tank is arranged on the bracket; the simulation of different hydrostatic pressures and flowing water flow rates is realized by adjusting the height of the bracket;
the sealing rubber rings are rectangular annular rubber rings, the number of the sealing rubber rings is four, hole sites are reserved on four corners of each sealing rubber ring, and the sealing rubber rings are fixed on four side surfaces of the upper disc and the lower disc of the crack through bolts; the sealing rubber ring is tightly attached to the upper disc and the lower disc of the crack, and the water storage box is tightly attached to the sealing rubber ring; the water storage box is fixed in a side threaded hole reserved in the upper and lower plates of the crack through a bolt;
the test method comprises the following specific steps:
selecting a proper fracture opening adjusting block according to the fracture opening to be simulated; placing the crack opening adjusting block on the crack lower disc, then placing the crack upper disc on the crack opening adjusting block, and ensuring that the side surfaces of the crack upper disc and the crack lower disc and the side surface of the crack opening adjusting block are on the same horizontal plane during placement;
tightly attaching a sealing rubber ring to the side surfaces of the upper disc and the lower disc of the crack, and tightly attaching a water storage box to the sealing rubber ring;
the bolt penetrates through the water storage box and the sealing rubber ring and then is fixed on a reserved hole position on the side surface of the upper and lower discs of the crack;
the steel wire pipe is respectively connected with the water storage box and the flowmeter and is connected to the water tank through the switching valve; mounting the water tank on the bracket; connecting a grouting pipeline into a grouting hole reserved in the fracture upper disc, closing a grouting valve of a grouting pipe, installing a flow velocity and pressure sensor into the reserved hole of the fracture upper disc, and opening flow velocity and pressure monitoring software to prepare for monitoring;
when crack grouting is carried out under the condition of simulating still water, firstly, all four water inflow regulating valves are closed, the four water tanks are filled with water, and the volumes of the water in the four water tanks are kept the same; secondly, opening four water inflow control valves to enable the water storage box and the upper and lower plates of the crack to be filled with water; adjusting the height of the support, and monitoring feedback data through a pressure sensor to determine whether hydrostatic pressure meets the conditions; opening a grouting pipeline grout inlet valve to start grouting after the hydrostatic pressure reaches a condition;
when crack grouting is carried out under the condition of simulating flowing water, four water inflow control valves are closed, only one water tank is filled with water, and the other three water tanks are not filled with water; opening water inlet regulating valves connected with the water filling water tanks and the water tanks opposite to the water filling water tanks, and closing the water inlet regulating valves of the other two water tanks; regulating the water inflow through the monitoring data of the flow meter to enable the water to reach a preset flow rate; and opening a slurry inlet valve for grouting when the flowing water flow velocity meets the condition.
2. The fracture grouting test method of claim 1, wherein a grouting hole is reserved at the central position of the fracture upper disc.
3. The fracture grouting test method of claim 1, wherein the data acquisition device comprises a pressure transmitter and a flow velocity sensor, and a sensor arrangement hole is reserved on the upper disk of the fracture for connecting the pressure transmitter and the flow velocity sensor; the sensor arrangement hole sites are symmetrically distributed about the side length central line of the square slit disc.
4. The crack grouting test method according to claim 1, wherein the crack opening adjusting blocks are cuboid, the crack opening adjusting blocks are provided with a plurality of groups, each group is four, and the length, the width and the height of each group of crack opening adjusting blocks are the same; the height of the different groups of fracture opening adjusting blocks is changed; the adjustment of the crack opening degree is realized by replacing the crack opening degree adjusting blocks with different heights.
5. The crack grouting test method of claim 1, wherein the water storage box is a cuboid, and a cutting groove is formed on the inner side of the cuboid; the four corners of the water storage box are provided with holes, and the water storage box can be fixed on the upper and lower plates of the crack through bolts.
6. The crack grouting test method according to claim 5, wherein the number of the water supply devices is four, and the four water supply devices are respectively connected to four sides of the grouting test bed through connecting pipelines.
7. The fracture grouting test method according to claim 1, wherein the connecting pipeline is composed of a steel wire pipe, a water inflow regulating valve, a switching valve and a flow meter; the steel wire pipe is respectively connected with the water storage box and the flowmeter and is connected to the water tank through the switching valve.
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| CN113188958A (en) * | 2021-04-19 | 2021-07-30 | 中国地质大学（武汉） | Fracture overflowing device and fracture seepage visual test system |
| CN113758849B (en) * | 2021-08-06 | 2023-06-02 | 山东大学 | Crack simulation structure, crack dynamic water plugging test device and method thereof |
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| CN205665138U (en) * | 2016-04-21 | 2016-10-26 | 河南理工大学 | Quick grouting simple check crack simulation experiment device |
| CN205826620U (en) * | 2016-05-31 | 2016-12-21 | 中核第四研究设计工程有限公司 | The dynamic water crack gap slurry filling imitation device of a kind of visualization |
| CN108169457A (en) * | 2017-12-26 | 2018-06-15 | 山东大学 | A kind of visualization becomes aperture crack grouting rig for model test and application method |
| CN108279113A (en) * | 2018-02-05 | 2018-07-13 | 路军富 | A kind of multi-functional grouting test model equipment of three-dimensional visualization |
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2018
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