Visual rock mass grouting experimental device for multi-field coupling monitoring

Abstract

The invention relates to the technical field of rock mass grouting experiments, and discloses a multi-field coupling monitoring visualized rock mass grouting experiment device which comprises an air source used for providing air power, a slurry storage tank used for storing slurry and a grouting assembly used for conducting a grouting experiment, and the output end of the air source is connected with an air pipe connected with the slurry storage tank; the grout storage tank is connected with a grouting pipe used for supplying materials to the grouting assembly. According to the invention, rock mass grouting test operation is realized, and data support is provided for rock mass grouting deformation research; rock mass constant-pressure grouting operation is achieved, the grouting pressure and speed of rock mass grouting can be adjusted, and rock mass grouting test requirements under different conditions are met; the rock mass is clamped by the sampling end part and the side surface, the clamping force can be adjusted according to experiment requirements, clamping and dismounting are facilitated, the defect that a traditional clamping instrument is disordered and inconvenient to collect and arrange is overcome, the experiment instrument is convenient to store and arrange, and the experiment efficiency of experimenters is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rock mass grouting experiment, and particularly relates to a visual rock mass grouting experiment device for multi-field coupling monitoring. BACKGROUND

[0002] The core purpose of the rock mass grouting experiment is to verify the reinforcement effect of grouting materials, processes and parameters on fractured rock mass by simulating engineering conditions, so as to provide a scientific basis for actual construction; when the experiment is performed, a sample block with a fracture is made of the rock mass, and then the sample block is placed in a clamping mechanism to simulate the rock sample environment, and a grouting mechanism is used to realize grouting operation, and experimental data such as pressure and displacement of the sample block are collected during the grouting process; in the operation of the existing grouting test device, the grouting pressure adjustment operation is inconvenient, and it is difficult to realize constant pressure grouting operation, and the sample block clamping and fixing mechanism is temporarily assembled by using simple plates, and the experimental personnel operate and build it, and therefore a visual rock mass grouting experiment device for multi-field coupling monitoring is provided. SUMMARY

[0003] To solve the technical problems in the prior art, the present application provides a visual rock mass grouting experiment device for multi-field coupling monitoring.

[0004] The present application adopts the following technical scheme: a visual rock mass grouting experiment device for multi-field coupling monitoring, comprising an air source for providing air power, a slurry storage tank for storing slurry, and a grouting assembly for grouting time, the air source output end is connected with the air pipe connected with the slurry storage tank, and the slurry storage tank is connected with the grouting pipe for feeding the grouting assembly;

[0005] The grouting assembly comprises a side clamping mechanism for clamping the side of the sample and an end clamping mechanism for clamping the end of the sample, the end clamping mechanism is connected with the butt joint pipe, the side clamping mechanism and the end clamping mechanism are provided with a sample block for grouting test, the sample block is provided with a fracture for test, the two ends of the sample block are provided with end gaskets abutting against the end clamping mechanism, the end gaskets are provided with grouting holes in communication with the grouting pipe, the two sides of the sample block are provided with side gaskets abutting against the side clamping mechanism, the side gaskets and the side clamping mechanism are provided with monitoring holes, the sample block is provided with a sensor mounting groove for mounting a sensor, and the top and bottom of the sample block are provided with heating mechanisms;

[0006] The side clamping mechanism comprises two groups of side plates, a plurality of tensioning mechanisms arranged between the two groups of side plates, and a connection mechanism for connecting the side plates and the tensioning mechanisms.

[0007] As a further improvement of the above scheme, the tensioning mechanism comprises a rotating tube threadedly sleeved with the connecting mechanism, outer rings of two ends of the rotating tube are fixedly sleeved with a stop ring, a sliding tube in sliding connection with the rotating tube is arranged between the two groups of stop rings, rotating shafts are fixedly connected on two sides of the sliding tube, the rotating shafts are rotatably connected with swing plates at other ends, and the swing plates are hingedly connected with connecting seats fixedly connected with adjacent side plates.

[0008] As a further improvement of the above scheme, the connecting mechanism comprises a lap plate and tensioning rods sequentially distributed along a length direction of the lap plate, the side plate is penetrated with mounting holes for the tensioning rods to pass through, and the tensioning rods are threadedly sleeved with the tensioning mechanism.

[0009] As a further improvement of the above scheme, the swing plates are provided with scales for indication along a length direction of the swing plates, the side plates are made of transparent materials, the side clamping mechanism is consistent with the end clamping mechanism in structure, and the outer ring of the rotating tube is fixedly sleeved with a rotating disc for adjustment operation.

[0010] As a further improvement of the above scheme, a hopper is mounted on the top of the slurry storage tank, electromagnetic valves are mounted on the air pipe and the grouting pipe, limiting pressure valves are mounted on the air pipe and the grouting pipe, and a pressure gauge is mounted on the slurry storage tank.

[0011] As a further improvement of the above scheme, a support is arranged on one side of the grouting assembly, and a camera for image acquisition is mounted on the support.

[0012] As a further improvement of the above scheme, the tensioning rod comprises a straight rod section fixedly connected with the lap plate and a threaded section arranged at the other end of the straight rod section, and the straight rod section is sleeved with a locking nut for locking.

[0013] As a further improvement of the above scheme, the end gaskets and the side gaskets are made of transparent elastic materials, the sensor mounting groove is provided with a temperature sensor or a stress sensor, and at least one of the temperature sensor and the stress sensor is arranged.

[0014] As a further improvement of the above scheme, the heating mechanism adopts a digital display electric heating silica gel sheet, and the heating mechanism is reserved with a wiring hole for cable extension.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. The present application adopts a combined design to realize rock mass grouting test operation, collect internal pressure, temperature and displacement data in the rock mass grouting process during the test, and provide data support for rock mass grouting deformation research.

[0017] 2. The present application realizes rock mass constant pressure grouting operation, can adjust the grouting pressure and speed of rock mass grouting, and is suitable for rock mass grouting test requirements under different conditions.

[0018] 3、The end and side of the rock mass are clamped, the clamping force can be adjusted according to the experimental requirements, the clamping and dismounting are convenient, the messy and inconvenient storage of traditional clamping devices are changed, the experimental instruments are stored and arranged conveniently, and the experimental efficiency of the experimental personnel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structure schematic view of a multi-field coupling monitoring visual rock mass grouting experimental device is provided.

[0020] Figure 2 A structure schematic view of a grouting assembly is provided.

[0021] Figure 3 A structure schematic view of a side clamping mechanism is provided.

[0022] Figure 4 A sectional view of the grouting assembly is provided.

[0023] Figure 5 A structure schematic view of a tensioning mechanism is provided.

[0024] Figure 6 A structure schematic view of a sample block is provided.

[0025] Figure 7 A structure schematic view of a sensor installation groove distribution is provided.

[0026] MAIN SYMBOL DESCRIPTION:

[0027] 1, air source; 2, grout storage tank; 3, grouting assembly; 4, air pipe; 5, grouting pipe; 6, hopper; 31, side clamping mechanism; 32, end clamping mechanism; 33, butt joint pipe; 34, sample block; 35, fracture; 36, end gasket; 37, grouting hole; 38, side gasket; 39, detection hole; 310, sensor installation groove; 311, heating mechanism; 41, side plate; 42, connection mechanism; 43, tensioning mechanism; 431, rotating pipe; 432, sliding pipe; 433, swing plate; 434, connecting seat; 421, lap plate; 422, tensioning rod. DETAILED DESCRIPTION

[0028] In the following, the application will be further described in conjunction with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0029] Example 1:

[0030] Please combine Figures 1-7The visual rock mass grouting experiment device of the multi-field coupling monitoring embodiment comprises an air source 1 for providing air power, a slurry storage tank 2 for storing slurry, and a grouting assembly 3 for performing a grouting test, the air source 1 is connected with a gas pipe 4 connected with the slurry storage tank 2, and the slurry storage tank 2 is connected with a grouting pipe 5 for feeding the grouting assembly 3;

[0031] The grouting assembly 3 comprises a side clamping mechanism 31 for clamping the side of a sample and an end clamping mechanism 32 for clamping the end of the sample, the end clamping mechanism 32 is connected with a butt joint pipe 33, a sample block 34 for the grouting test is arranged between the side clamping mechanism 31 and the end clamping mechanism 32, the sample block 34 is provided with a crack 35 for the test, both ends of the sample block 34 are provided with end gaskets 36 abutting against the end clamping mechanism 32, the end gaskets 36 are provided with grouting holes 37 in communication with the grouting pipe 5, both sides of the sample block 34 are provided with side gaskets 38 abutting against the side clamping mechanism 31, the side gaskets 38 and the side clamping mechanism 31 are both provided with monitoring holes 39, the monitoring holes 39 are installed with Lvdt displacement sensors, the sample block 34 is provided with a sensor mounting groove 310 for mounting the sensors, and the top and bottom of the sample block 34 are both installed with heating mechanisms 311;

[0032] The side clamping mechanism 31 comprises two groups of side plates 41, a plurality of tensioning mechanisms 43 arranged between the two groups of side plates 41, and a linking mechanism 42 for connecting the side plates 41 and the tensioning mechanisms 43;

[0033] The tensioning mechanism 43 comprises a rotating pipe 431 threadedly sleeved with the linking mechanism 42, the outer circle of both ends of the rotating pipe 431 is fixedly sleeved with a check ring, a sliding pipe 432 in sliding connection with the rotating pipe 431 is arranged between the two check rings, both sides of the sliding pipe 432 are fixedly connected with a rotating shaft, the other end of the rotating shaft is rotatably connected with an oscillating plate 433, and the other end of the oscillating plate 433 is hingedly connected with a connecting seat 434 fixedly connected with an adjacent side plate 41;

[0034] The linking mechanism 42 comprises a lap plate 421 and a plurality of tensioning rods 422 distributed along the length direction of the lap plate 421, the side plate 41 is penetrated with a mounting hole for the tensioning rod 422 to pass through, and the tensioning rod 422 is threadedly sleeved with the tensioning mechanism 43;

[0035] The oscillating plate 433 is provided with a scale for indication along the length direction thereof, the side plate 41 is made of transparent material, the structure of the side clamping mechanism 31 is consistent with that of the end clamping mechanism 32, and the outer circle of the rotating pipe 431 is fixedly sleeved with a rotating disc for adjustment operation.

[0036] When the sample is installed, according to the experiment, the crack 35 and the sensor installation groove 310 are made in the sample block 34 in advance, and the temperature sensor and the stress sensor for collecting the test data are arranged in the sensor installation groove 310 in advance, then the sample block 34 is placed on the inner side of the end clamping mechanism 32, the end gasket 35 is arranged at both ends of the sample block 34, then the connecting mechanism 42 is passed through the side plate 41 and connected with the tensioning mechanism 43, the connecting mechanism 42 is tensioned by rotating the tensioning mechanism 43, the end clamping mechanism 32 clamps and fixes the sample block 34, then the side clamping mechanism 31 clamps and fixes the sample block 34 from the side in the same way, when the grouting assembly 3 is installed, the grouting pipe 5 is connected, then the grouting slurry is poured into the slurry storage tank 2 to start the grouting test.

[0037] Embodiment 2:

[0038] The embodiment is further improved on the basis of the embodiment 1, the hopper 6 is installed on the top of the slurry storage tank 2, the electromagnetic valve is installed on the air pipe 4 and the grouting pipe 5, the pressure limiting valve is installed on the air pipe 4 and the grouting pipe 5, and the pressure gauge is installed on the slurry storage tank 2.

[0039] The bracket is arranged on one side of the grouting assembly 3, and the camera for image collection is installed on the bracket.

[0040] The tensioning rod 422 includes a straight rod section fixed with the lap plate 421 and a threaded section arranged at the other end of the straight rod section, and the straight rod section is sleeved with a locking nut for locking.

[0041] The end gasket 36 and the side gasket 38 are made of transparent elastic material, the sensor installation groove 310 is provided with the temperature sensor or the stress sensor, and at least one of the temperature sensor and the stress sensor is arranged.

[0042] The heating mechanism 311 adopts a digital display electric heating silica gel sheet, and the heating mechanism 311 is provided with a wiring hole for the cable to extend out.

[0043] The control box is further arranged, the controller is arranged in the control box, the power supply interface, the data interface, the display screen and the power switch are arranged on one side of the control box, and the controller is connected with the digital display electric heating silica gel sheet, the temperature sensor, the stress sensor, the camera, the electromagnetic valve, the pressure limiting valve, the pressure gauge, the Lvdt displacement sensor, the power supply interface, the data interface, the display screen and the power switch.

[0044] When the sample block 34 is installed, the tension rod 422 is passed through the side plate 41 and connected with the rotating tube 431, the inner thread is arranged in the inner circle of the rotating tube 431, when the rotating tube 431 rotates, the tension rod 422 at both ends of the rotating tube 431 moves to the direction of approaching each other, at the same time, the tension rod 422 and the rotating tube 431 are in the same straight line, the tension of the two groups of side plates 41 can be realized, the clamping operation of the sample block 43 is realized, in order to facilitate the adjustment of the tension state, the marks are made on the tension rod 422 in advance, the position of the marks on the tension rod 422 is used to determine the position of the scale on the swing plate 433, so as to determine the tension state; the above-mentioned way is used to realize the clamping and fixing of the side surface and the end of the sample block 43.

[0045] In the grouting test, the slurry is input into the slurry storage tank 2 by the air flow along the air pipe 4, the slurry in the slurry storage tank 2 is extruded by the air flow and injected into the grouting assembly 3 along the grouting pipe 5 for experiment, at this time, the grouting pipe 5 is connected with one of the two connecting pipes 33, the pressure sensor is arranged on the connecting pipe 33 for detecting the pressure, so as to realize the detection of the pressure difference of the two ends of the grouting assembly 3 in the experiment process.

[0046] In the grouting test process, the temperature sensor and the stress sensor arranged on the sensor installation groove 310 of the sample block 43 are used to detect the temperature and pressure changes in the sample block 43 during the grouting process, at the same time, the Lvdt displacement sensor is used to detect the displacement change of the sample block 43 during the grouting process, the pressure-time curve, flow, density and other parameters in the grouting test process can be realized, and the relative displacement detection of the sample block 43 on both sides of the fracture 35 can be realized, which directly reflects the mechanical behavior of the fracture under the action of grouting;

[0047] In the grouting, the lower part of the slurry storage tank 2 is slurry, the upper part is air, the air pressure is provided by the air compressor, the air pressure is converted into the slurry pressure, the air pressure value is the same as the slurry pressure value, by adjusting the pressure of the air compressor, the dynamic adjustment of the grouting pressure can be realized; with the progress of the grouting process, the volume of the slurry in the slurry storage tank 2 will decrease correspondingly, but the volume change rate is less than the air supply rate of the air compressor, the air pressure in the slurry storage tank 2 can be maintained constant, and constant pressure grouting is realized.

[0048] The present application adopts combined design, realizes rock mass grouting test operation, collects internal pressure, temperature and displacement data in the process of rock mass grouting in the test, provides data support for rock mass grouting deformation research, realizes rock mass constant pressure grouting operation, can adjust rock mass grouting pressure and speed, is suitable for rock mass grouting test demand under different conditions, and can adjust clamping force according to experimental demand, is convenient for clamping and dismounting, changes the shortcomings that traditional clamping instruments are messy and inconvenient to collect and arrange, is convenient for storage and arrangement of experimental instruments, and improves experimental efficiency of experimental personnel.

[0049] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the protection scope of the present application.

Claims

1. A multi-field coupling monitoring visualized rock mass grouting experiment device, characterized in that, The injection grouting assembly is connected with the air pipe and the grouting pipe, and the grouting pipe is used for feeding the injection grouting assembly. The side clamping mechanism and the end clamping mechanism are provided with monitoring holes, and the sample block is provided with a sensor mounting groove for mounting a sensor. The side clamping mechanism comprises two groups of side plates, a plurality of tensioning mechanisms arranged between the two groups of side plates, and a connecting mechanism for connecting the side plates and the tensioning mechanisms.

2. The visualized rock mass grouting experiment device of multiple field coupling monitoring according to claim 1, characterized in that, The tensioning mechanism comprises a rotating pipe threadedly connected with the connecting mechanism, and outer rings of two ends of the rotating pipe are fixedly sleeved with stop rings.

3. The visualized rock mass grouting experiment device of multiple field coupling monitoring of claim 1, wherein, The connecting mechanism comprises a lap plate and a plurality of tensioning rods arranged along a length direction of the lap plate.

4. The visualized rock mass grouting experiment device of multiple field coupling monitoring according to claim 2, characterized in that, The side plate is made of transparent material, the side clamping mechanism is identical in structure to the end clamping mechanism, and an outer ring of the rotating pipe is fixedly sleeved with a rotating disc for adjustment operation.

5. The visualized rock mass grouting experiment device of multiple field coupling monitoring of claim 1, wherein, The grouting tank is provided with a hopper on a top portion thereof, and the hopper, the air pipe and the grouting pipe are all provided with electromagnetic valves.

6. The visualized rock mass grouting experiment device of multiple field coupling monitoring according to claim 1, characterized in that, The tensioning rod comprises a straight rod segment fixedly connected with the lap plate and a threaded segment arranged at the other end of the straight rod segment.

7. The visualized rock mass grouting experiment device of multiple field coupling monitoring of claim 3, wherein, The end pad and the side pad are both made of transparent elastic material, the sensor mounting groove is provided with a temperature sensor or a stress sensor, and at least one of the temperature sensor and the stress sensor is arranged.

8. The visualized rock mass grouting experiment device of multiple field coupling monitoring of claim 1, wherein, The heating mechanism adopts a digital electric heating silica gel sheet, and the heating mechanism is provided with a wiring hole for cable extension.

9. The visualized rock mass grouting experiment device of multiple field coupling monitoring of claim 1, wherein, ​

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