CN115876634A - Rock freezing-thawing cycle degradation overall process multi-channel test equipment and test method - Google Patents
Rock freezing-thawing cycle degradation overall process multi-channel test equipment and test method Download PDFInfo
- Publication number
- CN115876634A CN115876634A CN202310190541.4A CN202310190541A CN115876634A CN 115876634 A CN115876634 A CN 115876634A CN 202310190541 A CN202310190541 A CN 202310190541A CN 115876634 A CN115876634 A CN 115876634A
- Authority
- CN
- China
- Prior art keywords
- rock
- test
- freeze
- transparent
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 208
- 239000011435 rock Substances 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000008569 process Effects 0.000 title claims abstract description 37
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 17
- 230000015556 catabolic process Effects 0.000 title claims abstract description 15
- 238000010257 thawing Methods 0.000 title claims description 34
- 238000010998 test method Methods 0.000 title abstract description 5
- 230000005484 gravity Effects 0.000 claims abstract description 41
- 238000005057 refrigeration Methods 0.000 claims abstract description 17
- 238000005485 electric heating Methods 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 230000006866 deterioration Effects 0.000 claims 6
- 230000000007 visual effect Effects 0.000 abstract description 4
- 238000011160 research Methods 0.000 description 9
- 238000007710 freezing Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 6
- 238000012424 Freeze-thaw process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004660 morphological change Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000002645 vision therapy Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a multi-channel testing device and a testing method for the whole process of freeze-thaw cycle degradation of rocks. A transparent test box of the test equipment is internally provided with a plurality of gravity sensors which can be arranged on upper and lower wave velocity test electrodes at two ends of a rock sample, a bottom plate at the bottom of the transparent test box is provided with a plurality of gravity sensors, electric heating tubes and refrigeration pipelines communicated with a refrigeration compressor are uniformly distributed on the inner wall of the transparent test box, and the transparent test box is also fixed with a temperature sensor; the wave speed tester, the gravity data instrument and the controller are arranged outside the transparent test box, the upper wave speed test electrode and the lower wave speed test electrode are respectively connected with the wave speed tester, the gravity sensor is connected with the gravity data instrument, the electric heating tube and the power supply control end of the refrigeration compressor are connected with the controller, and the signal output ports of the temperature sensor, the wave speed tester and the gravity data instrument are connected with the controller. The test method comprises the steps of sample preparation, sample placement, sample test and data processing. The invention has the characteristics of simple structure, visual observation of the test process in the whole process, high test efficiency and accurate and reliable test result.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a multi-channel testing device and a testing method for the whole process of freeze-thaw cycle degradation of rocks, which have the advantages of simple structure, visual observation of the testing process in the whole process, high testing efficiency and accurate and reliable testing result.
Background
In the exploration and design stage of a large-scale surface mine, corresponding rock mechanics special research is usually completed to support the mining design work, and the mine construction is further served from the perspective of safety and economy. Among them, the rock mechanics laboratory test is the indispensable experimental research work in the rock mechanics special research.
For the open-pit mine in the cold region of high altitude, the freeze-thaw cycle effect is the key point of the mine slope research facing the influence caused by extreme climate all the year round, the freeze-thaw cycle test research also becomes the standard hard requirement, and the accurate and efficient rock mechanical parameters provided by the test are the important basis of the subsequent research.
Simple rock freezing-thawing cycle test technology is mature, and most of testers mainly carry out tests according to the requirements of the engineering rock mass test method standard (GB/T50266). Nevertheless, there are some testing techniques that need further improvement. At present, a common test method is to use an automatic freeze-thaw tester to perform a mechanical property test after a specified number of freeze-thaw tests, such a test can only reflect the mechanical state and parameters at the last moment, and the morphological change trend of a rock sample cannot be observed in a closed test machine, for some rocks with low strength and weak erosion resistance, the rocks are completely disintegrated when the specified number of test tests are not completed, on one hand, the disintegration process and time cannot be known, on the other hand, the mechanical test cannot be performed after the freeze-thaw cycle is completed, and such a test result lacks practical significance for a mine slope and causes loss of manpower and material resources. Therefore, in the prior art, the gas permeability of a sample under the same ambient pressure and the same osmotic pressure after different freezing and thawing cycle times is measured, then a change curve of the rock freezing and thawing damage amount along with the freezing and thawing cycle times is drawn according to a self-defined freezing and thawing damage amount formula and is fitted, and the rock damage degree caused by any freezing and thawing cycle time is determined according to a fitting function; although the defects of mechanical property tests performed after the existing freeze-thaw tests can be overcome, the whole freeze-thaw tests need to be performed in a pressure container and need to be kept in a stable pressure state for a long time, so that the requirements on the sealing performance of the freeze-thaw test device and the stability of an air supply system are high, and the structure of the gas permeability device of the rock sample is complex. In addition, in the prior art, a sample strain acquisition system based on a thermal infrared imager and a double-image acquisition device is arranged outside a box body of the freeze-thaw experimental box, and a temperature and air pressure monitoring device in the box body is combined, so that the environmental air pressure states at different altitudes can be simulated, and the temperature full-scale change condition and the sample full-field deformation condition (particularly the surface which is most easily damaged in the freeze-thaw process) of the sample in the freeze-thaw cycle process can be obtained; because a sample strain acquisition system needs a more complex machine vision training process, and imperfect training and environmental illumination cause thousands of poor recognition errors, more technical problems need to be solved, and the sample strain acquisition system is still in a research stage at present. Therefore, research on rock freezing-thawing cycle test equipment with simple structure, high test efficiency, visualized whole test process and accurate and reliable test result is urgently needed at the present stage.
Disclosure of Invention
According to the defects of the prior art, the invention provides the whole-process multi-channel testing equipment for the degradation of the rock freezing-thawing cycle, which has the advantages of simple structure, visual observation of the testing process in the whole process, high testing efficiency and accurate and reliable testing result, and also provides the testing method of the whole-process multi-channel testing equipment for the degradation of the rock freezing-thawing cycle.
The multi-channel test equipment for the whole process of the freeze-thaw cycle degradation of the rock is realized as follows: the transparent test box is a closed container, a bottom plate is fixedly arranged at the bottom of the transparent test box, a plurality of gravity sensors capable of bearing a rock sample are arranged on the bottom plate, a lower wave velocity test pole is arranged on the bearing surface of each gravity sensor, and an upper wave velocity test pole which can be fixed at the upper end of the rock sample and is opposite to the lower wave velocity test pole is further arranged in the transparent test box;
electric heating tubes are uniformly distributed on the inner wall of the transparent test box, a refrigeration compressor is further arranged outside the transparent test box, refrigeration pipelines communicated with the refrigeration compressor are uniformly distributed on the inner wall of the transparent test box, and a temperature sensor is further fixedly arranged on the transparent test box;
the transparent test box is also provided with a wave velocity tester, a gravity data instrument and a controller outside, the lower wave velocity test pole and the upper wave velocity test pole are respectively connected with a signal input port of the wave velocity tester, the gravity sensor is connected with a signal input port of the gravity data instrument, power supply control ends of the electric heating tube and the refrigeration compressor are connected with a control port of the controller, and signal output ports of the temperature sensor, the wave velocity tester and the gravity data instrument are connected with a signal input port of the controller.
The testing method of the multi-channel testing equipment for the whole process of the freeze-thaw cycle degradation of the rock is realized in the following steps:
A. preparation of a rock sample: selecting the same fresh whole rock in a typical rock stratum of a site to be measured to prepare a plurality of samples according to specifications, then drying to constant weight and respectively weighing the weightm s Then cooled to room temperature, subjected to water saturation treatment and weighedm p Obtaining a rock sample;
B. placing a rock sample: respectively sleeving an upper sealing cover and a lower sealing cover at two ends of each rock sample, and then sequentially and stably placing the rock samples on the bearing surfaces of the gravity sensors in the transparent test box;
C. and (3) freeze-thaw cycle testing: after the rock samples are placed, the transparent test box is sealed and water is injected inwards, then the controller controls the electric heating pipe and the refrigerating compressor to freeze the rock samples for X hours at a preset low temperature, and then the water temperature is kept at the preset temperature to be thawed for Y hours, so that a freeze-thaw cycle test is completed until the freeze-thaw cycle tests for a preset number of times are completed or the freeze-thaw quality loss rate of the rock samples in a preset number exceeds a specified value; the controller respectively reads the rock wave velocity of the wave velocity tester in the test process and/or after the test is finishedV pr Weight of frozen and thawed sample of gravity data instrumentm fm And recording;
D. processing test data: the controller calculates the freeze-thaw quality loss rate M of the rock sample according to the read data:
wherein: m is p The weight of a saturated sample before freeze thawing is expressed in g; m is fm The weight of the sample after freeze thawing is g; m is a unit of s The weight of the dried sample before the test is given in g.
The invention has the beneficial effects that:
1. according to the invention, the gravity sensor is arranged in the transparent test box, the wave velocity testing electrodes are correspondingly arranged at two ends of the rock sample, and the electric heating tube and the refrigerating pipeline are arranged on the inner wall of the transparent test box, so that the wave velocity change and quality change data of each rock sample can be obtained in a freeze-thaw cycle test, the transparent test box can also observe the full-field deformation condition (particularly the surface damage in the freeze-thaw process) of each rock sample in real time, and the disintegration process and time of each rock sample can be known; by combining automatic monitoring of the mass change data with real-time observation of the full-field deformation condition, a large number of invalid tests in the traditional freeze-thaw test can be effectively avoided, and the degradation trend of the rock sample along with the number of times of the freeze-thaw test can be revealed according to the wave speed change data and the real-time observation, so that the purposes of efficiently developing the freeze-thaw cycle test of the rock and providing accurate and efficient rock mechanical parameters for subsequent research are achieved.
2. According to the invention, the gravity sensors capable of bearing the rock samples and the wave velocity testing electrodes are arranged in the transparent test box, so that the transparent test box can simultaneously test the rock samples, and the testing efficiency is improved; meanwhile, a wave velocity tester and a gravity data instrument are arranged outside the transparent test box for control, a controller capable of controlling the electric heating tube and the refrigerating pipeline to heat and freeze is further arranged, and the controller can also read data of the wave velocity tester and the gravity data instrument to calculate and automatically judge and stop testing, so that the testing process can be automatically carried out, and the artificial interference can be discharged, and the testing result is more accurate and reliable.
3. The invention obtains the wave velocity change and mass change data of each rock sample in the freeze-thaw cycle test, and not only does the freeze-thaw test and the measurement of the wave velocity change and mass change need not harsh environment and conditions, but also not only makes the structure of the whole device simpler, but also can automatically carry out the test and measurement process, and further improves the accuracy and reliability of the test result.
4. According to the invention, through automatically acquiring the quality change data of each rock sample and observing the full-field deformation condition of each rock sample in real time through human eyes, the accurate data is combined with manual identification, so that not only can the disintegration process and time of each rock sample be obtained, but also the damage of the rock test and the end of the test can be accurately judged by automatically calculating the freeze-thaw quality loss rate, the waste of subsequent freeze-thaw test and mechanical property test can be avoided, and the test cost is reduced.
In conclusion, the invention has the characteristics of simple structure, visual observation of the test process in the whole process, high test efficiency and accurate and reliable test result.
Drawings
FIG. 1 is a schematic diagram of the structure of a multi-channel testing apparatus for the whole degradation process of a freeze-thaw cycle of rock according to the present invention;
FIG. 2 is an enlarged top view of the transparent test cassette of FIG. 1;
FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view taken along line B-B of FIG. 2;
in the figure: 1-a transparent test box, 101-a bottom plate, 102-a water outlet, 2-a rock sample, 3-a gravity sensor, 4-a lower wave speed testing pole, 5-an upper wave speed testing pole, 6-an electric heating tube, 7-a refrigeration compressor, 8-a refrigeration pipeline, 9-a temperature sensor, 10-a wave speed tester, 11-a gravity data instrument, 12-a controller, 13-a transparent window, 131-an air inlet, 132-an air outlet, 14-a stirring blade, 15-an upper sealing cover and 16-a lower sealing cover.
Detailed Description
The invention is further described with reference to the following figures and examples, but the invention is not limited in any way and any variations or modifications based on the teachings of the invention are within the scope of the invention.
As shown in fig. 1 to 4, the multichannel testing apparatus for the whole process of freeze-thaw cycle degradation of rock of the present invention comprises a transparent test box 1, wherein the transparent test box 1 is a closed container and the bottom of the transparent test box is fixedly provided with a bottom plate 101, the bottom plate 101 is provided with a plurality of gravity sensors 3 capable of bearing a rock sample 2, the bearing surface of the gravity sensors 3 is provided with a lower wave velocity testing electrode 4, and the transparent test box 1 is further internally provided with an upper wave velocity testing electrode 5 capable of being fixed at the upper end of the rock sample 2 and opposite to the lower wave velocity testing electrode 4;
the transparent test box 1 is also externally provided with a wave velocity tester 10, a gravity data instrument 11 and a controller 12, the lower wave velocity tester 4 and the upper wave velocity tester 5 are respectively connected with a signal input port of the wave velocity tester 10, the gravity sensor 3 is connected with a signal input port of the gravity data instrument 11, power supply control ends of the electric heating tube 6 and the refrigeration compressor 7 are connected with a control port of the controller 12, and signal output ports of the temperature sensor 9, the wave velocity tester 10 and the gravity data instrument 11 are connected with a signal input port of the controller 12.
As shown in fig. 2 and 3, at least the top cover and one side wall of the transparent test box 1 are provided with transparent windows 13 through which all the tested rock samples 2 can be observed, and the electric heating tubes 6 and the refrigerating pipelines 8 are at least uniformly distributed on the non-transparent side wall of the transparent test box 1 in a staggered manner; the bearing surface of the gravity sensor 3 is not larger than the bottom surface of the rock sample 2.
A stirring paddle 14 is arranged on the bottom plate 101 and/or the side wall of the transparent test box 1, a stirring shaft of the stirring paddle 14 is connected with a motor shaft of a stirring motor outside the transparent test box 1, and a power control end of the stirring motor is connected with a control port of the controller 12.
As shown in fig. 2 and 4, the upper end and the lower end of the rock sample 2 are respectively and fixedly sleeved with an upper sealing cover 15 and a lower sealing cover 16, and the lower wave velocity test pole 4 and the upper wave velocity test pole 5 are respectively and correspondingly arranged in the lower sealing cover 16 and the upper sealing cover 15.
The upper sealing cover 15 and the lower sealing cover 16 are rubber covers with protruding edges and are tightly matched with the rock sample 2.
As shown in FIG. 2, the transparent test cassette 1 has a water inlet on the top cover or the side wall and a water outlet 102 on the bottom plate 101 or the side wall.
The controller 12 respectively reads the rock wave velocity of the wave velocity tester 10 in the test process and/or after the test is finishedV pr Weight of frozen and thawed sample from gravimetric data instrument 11m fm And recording; the controller 12 calculates the freeze-thaw quality loss rate of the rock sample 2 according to the read dataM：
Wherein:m p the weight of a saturated sample before freeze thawing is expressed in g;m fm the weight of the sample after freeze thawing is in g;m s the weight of the dried sample before the test is expressed in g;
the controller 12 controls the completion of the freeze-thaw cycle test for a predetermined number of times or terminates the freeze-thaw cycle test if it is monitored that the freeze-thaw quality loss rate of the predetermined number of rock samples 2 exceeds a prescribed value.
The transparent window 13 is provided with hollow glass, one side of the hollow glass is provided with a plurality of air inlets 131 along the side length and a plurality of air outlets 132 corresponding to the side length, and the air inlets 131 are communicated with a pipeline of an air supply system.
The controller 12 is a PLC, an industrial personal computer or a PC.
The invention relates to a testing method of multi-channel testing equipment for the whole process of freeze-thaw cycle degradation of rock, which comprises the following steps:
A. preparation of a rock sample: selecting the same fresh whole rock in a typical rock stratum of a site to be measured to prepare a plurality of samples according to specifications, then drying to constant weight and respectively weighing the weightm s Then cooled to room temperature, saturated with water and weighedm p Obtaining a rock sample 2;
B. placing a rock sample: respectively sleeving an upper sealing cover 15 and a lower sealing cover 16 at two ends of each rock sample 2, and then sequentially and stably placing the rock samples on the bearing surfaces of the gravity sensors 3 in the transparent test box 1;
C. freeze-thaw cycle testing: after the rock samples 2 are placed, the transparent test box 1 is sealed and water is injected inwards, then the controller 12 controls the electric heating tube 6 and the refrigeration compressor 7 to freeze the rock samples 2 for X hours at a preset low temperature, and then the water temperature is kept at the preset temperature to be thawed for Y hours, so that a freeze-thaw cycle test is completed until the freeze-thaw cycle test for a preset number of times is completed or the freeze-thaw quality loss rate of a preset number of rock samples 2 exceeds a specified value; the controller 12 reads the rock wave velocity of the wave velocity tester 10 respectively during and/or after the testV pr Weight of frozen and thawed sample from gravimetric data instrument 11m fm And recording;
D. processing test data: the controller 12 calculates the freeze-thaw quality loss rate of the rock sample 2 according to the read dataM：
Wherein:m p the weight of a saturated sample before freeze thawing is expressed in g;m fm the weight of the sample after freeze thawing is in g;m s the weight of the dried sample before the test is given in g.
In the test data processing step, the controller 12 reads the rock wave velocity according to the measured wave velocityV pr And calculating the loss rate of the freezing-thawing qualityMAnd respectively fitting and drawing a change curve.
In the preparation of the rock sample, the fresh and complete rock is processed into a dimension of phi 50 multiplied by 100mm along the direction of an original rock layer.
In the step of testing the freezing-thawing cycle, the freezing-thawing quality loss rate of the rock sample 2MThe specified value is 5%, and the controller 12 respectively reads the rock wave velocity of the wave velocity tester 10 after a freeze-thaw cycle test is finishedV pr Weight of frozen and thawed sample from gravimetric data instrument 11m fm And recorded.
The value range of X and/or Y in the freeze-thaw cycle test is 2 to 6.
Example 1
As shown in fig. 1 to 4, the freeze-thaw testing process of the rock sample is as follows:
1. selecting the same fresh complete rock in a typical rock stratum of a site to be measured, processing the fresh complete rock into a plurality of samples with phi 50 multiplied by 100mm along the direction of an original rock stratum, then placing the samples in a drying oven with the temperature of 105 ℃ to be dried to constant weight, and respectively weighing the weightm s Cooling to room temperature, performing water saturation treatment (placing into a dry vacuum saturation tank, vacuumizing with a vacuum pump, closing a valve, pressing distilled water into a vacuum saturation device through a pipeline under atmospheric pressure, closing the valve, vacuumizing the saturation tank with the vacuum pump for a period of time, standing for 48 h), and weighingm p Thus, rock sample 2 was obtained.
2. The two ends of 10 rock samples 2 are respectively sleeved with an upper sealing cover 15 and a lower sealing cover 16, and then are sequentially and stably placed on the bearing surface of each gravity sensor 3 in the transparent test box 1.
3. After the rock samples 2 are placed, the transparent test box 1 is sealed and water is injected inwards, then a PC (namely a controller 12) controls a cold compressor 7 to work according to a preset program, so that the rock samples 2 are frozen at the temperature of minus 20 +/-2 ℃ for 4 hours, and then an electric heating tube 6 is controlled to work, so that the water temperature is kept at the temperature of minus 2 ℃ for 4 hours for melting, and a freezing and thawing cycle test is completed; sequentially performing about 25 freeze-thaw cycles, or when a predetermined number (e.g., 5 and above) of rock specimens 2 have a freeze-thaw quality loss rateMIf the test result exceeds the specified value (such as 5 percent), the test is ended; the wave velocity tester 10 measures the wave velocity of the rock every time a freeze-thaw cycle test is completedV pr And the gravity data instrument 11 measures the weight of the sample after freeze thawingm fm The controller 12 reads the rock wave velocity of the wave velocity tester 10V pr Weight of frozen and thawed sample from gravimetric data instrument 11m fm And recording; during the test, the tester can observe the full-field deformation (especially the surface damage) of each rock sample 2 through the transparent window 13 in real time, therebyThe process and timing of disintegration of each rock sample 2 can be known.
4. The controller 12 calculates the freeze-thaw quality loss rate of the rock sample 2 according to the read dataM：
Wherein:m p the weight of a saturated sample before freeze thawing is expressed in g;m fm the weight of the sample after freeze thawing is g;m s the weight of the dried sample before the test is expressed in g;
the controller 12 reads the rock wave velocity according to the measured wave velocityV pr And calculating the loss rate of the freezing-thawing qualityMAnd respectively fitting and drawing a change curve, so that the whole process of the degradation of the plurality of rock test pieces 2 under the condition of freeze-thaw cycles can be reflected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The multichannel testing equipment for the whole process of freeze-thaw cycle degradation of rocks is characterized by comprising a transparent test box (1), wherein the transparent test box (1) is a closed container, the bottom of the transparent test box is fixedly provided with a bottom plate (101), the bottom plate (101) is provided with a plurality of gravity sensors (3) capable of bearing rock samples (2), the bearing surfaces of the gravity sensors (3) are provided with lower wave velocity testing poles (4), and the transparent test box (1) is internally provided with upper wave velocity testing poles (5) which can be fixed at the upper ends of the rock samples (2) and are opposite to the lower wave velocity testing poles (4);
electric heating tubes (6) are uniformly distributed on the inner wall of the transparent test box (1), a refrigeration compressor (7) is further arranged outside the transparent test box (1), refrigeration pipelines (8) communicated with the refrigeration compressor (7) are uniformly distributed on the inner wall of the transparent test box (1), and a temperature sensor (9) is further fixedly arranged on the transparent test box (1);
transparent test box (1) still is provided with wave speed tester (10), gravity data appearance (11) and controller (12) outward, wave speed test utmost point (4) and last wave speed test utmost point (5) are connected with the signal input port of wave speed tester (10) respectively down, gravity sensor (3) are connected with the signal input port of gravity data appearance (11), the power control end of electrothermal tube (6) and compressor (7) is connected with the control port of controller (12), the signal output port of temperature sensor (9) and wave speed tester (10), gravity data appearance (11) is connected with the signal input port of controller (12).
2. The multi-channel testing equipment for the whole process of the freeze-thaw cycle deterioration of the rocks according to claim 1, characterized in that at least a top cover and one side wall of the transparent testing box (1) are provided with transparent windows (13) for observing all the tested rock samples (2), and the electric heating pipes (6) and the refrigerating pipes (8) are uniformly distributed on the non-transparent side wall of the transparent testing box (1) at least in a staggered way; the bearing surface of the gravity sensor (3) is not larger than the bottom surface of the rock sample (2).
3. The multi-channel testing device for the whole process of the freeze-thaw cycle deterioration of the rock according to claim 2, wherein a stirring paddle (14) is arranged on the bottom plate (101) and/or the side wall of the transparent test box (1), a stirring shaft of the stirring paddle (14) is connected with a motor shaft of a stirring motor outside the transparent test box (1), and a power supply control end of the stirring motor is connected with a control port of the controller (12).
4. The multichannel testing equipment for the whole process of the freeze-thaw cycle degradation of the rock as claimed in claim 2, wherein the upper and lower ends of the rock sample (2) are respectively and fixedly sleeved with an upper sealing cover (15) and a lower sealing cover (16), and the lower wave velocity testing pole (4) and the upper wave velocity testing pole (5) are respectively and correspondingly arranged in the lower sealing cover (16) and the upper sealing cover (15).
5. The multi-channel rock freezing-thawing cycle deterioration testing apparatus as claimed in claim 2, wherein the top cover or the upper part of the side wall of the transparent test box (1) is provided with a water filling port and the bottom plate (101) or the lower part of the side wall is provided with a water draining port (102).
6. The multi-channel testing device for the whole degradation process of freeze-thaw cycles of rocks as claimed in any one of claims 2 to 5, wherein the controller (12) reads the rock wave velocity of the wave velocity tester (10) during and/or after the test is completed respectivelyV pr And the weight of the frozen and thawed sample of the gravity data instrument (11)m fm And recording; the controller (12) calculates the freeze-thaw quality loss rate of the rock sample (2) according to the read dataM：
Wherein:m p the weight of a saturated sample before freeze thawing is expressed in g;m fm the weight of the sample after freeze thawing is g;m s the weight of the dried sample before the test is given as g;
the controller (12) controls the completion of the freeze-thaw cycle test for a predetermined number of times, or the end of the freeze-thaw cycle test when the freeze-thaw quality loss rate of a predetermined number of rock samples (2) is monitored to exceed a specified value.
7. The multi-channel testing equipment for the whole process of the freeze-thaw cycle deterioration of the rocks according to claim 6, wherein the transparent window (13) is provided with hollow glass, one side of the hollow glass is provided with a plurality of air inlets (131) along the side length and a plurality of air outlets (132) along the corresponding side, and the air inlets (131) are communicated with a pipeline of an air supply system.
8. A testing method based on the rock freeze-thaw cycle deterioration whole-process multi-channel testing equipment of any one of claims 4 to 7, characterized by comprising the following steps:
A. preparation of a rock sample: selecting the same fresh whole rock in a typical rock stratum of a site to be measured to prepare a plurality of samples according to specifications, then drying to constant weight and respectively weighing the weightm s Then cooled to room temperature, saturated with water and weighedm p Obtaining a rock sample (2);
B. placing a rock sample: respectively sleeving an upper sealing cover (15) and a lower sealing cover (16) at two ends of each rock sample (2), and then sequentially and stably placing the rock samples on the bearing surfaces of the gravity sensors (3) in the transparent test box (1);
C. and (3) freeze-thaw cycle testing: after the rock samples (2) are placed, the transparent test box (1) is sealed and water is injected inwards, then the controller (12) controls the electric heating pipe (6) and the refrigerating compressor (7) to freeze the rock samples (2) at a preset low temperature for X hours, and then the water temperature is kept at the preset temperature for Y hours to complete a freeze-thaw cycle test until the freeze-thaw cycle test for a preset number of times is completed or the freeze-thaw quality loss rate of the rock samples (2) in a preset number exceeds a specified value; the controller (12) respectively reads the rock wave velocity of the wave velocity tester (10) in the test process and/or after the test is finishedV pr Weight of frozen and thawed sample of the gravity data instrument (11)m fm And recording;
D. processing test data: the controller (12) calculates the freeze-thaw quality loss rate of the rock sample (2) according to the read dataM：
Wherein:m p the weight of a saturated sample before freeze thawing is expressed in g;m fm the weight of the sample after freeze thawing is g;m s the weight of the dried sample before the test is given in g.
9. The method for testing the multi-channel testing equipment for the whole process of the freeze-thaw cycle degradation of the rock according to claim 8, wherein in the step of processing the test data, the controller (12) reads the wave velocity of the rock according to the read wave velocityV pr And calculating the loss rate of the freezing-thawing qualityMAnd respectively fitting and drawing a change curve.
10. The method for testing the multi-channel testing equipment for the whole process of the freezing-thawing cycle deterioration of the rock according to claim 8, wherein in the step of the freezing-thawing cycle testing, the freezing-thawing quality loss rate of the rock sample (2) is reducedMThe specified value is 5%, and the controller (12) respectively reads the rock wave velocity of the wave velocity tester (10) after a freeze-thaw cycle test is finishedV pr And the weight of the frozen and thawed sample of the gravity data instrument (11)m fm And recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310190541.4A CN115876634A (en) | 2023-03-02 | 2023-03-02 | Rock freezing-thawing cycle degradation overall process multi-channel test equipment and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310190541.4A CN115876634A (en) | 2023-03-02 | 2023-03-02 | Rock freezing-thawing cycle degradation overall process multi-channel test equipment and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115876634A true CN115876634A (en) | 2023-03-31 |
Family
ID=85761797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310190541.4A Pending CN115876634A (en) | 2023-03-02 | 2023-03-02 | Rock freezing-thawing cycle degradation overall process multi-channel test equipment and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115876634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117250219A (en) * | 2023-08-19 | 2023-12-19 | 四川大学 | Rock freeze-thawing cycle test equipment and method for monitoring frost heaving pressure and freeze-thawing damage |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133009A (en) * | 1997-11-04 | 1999-05-21 | Yokohama Rika Kk | Method for testing durability of concrete sample, concrete sample container for ultrasonic measurement used in the method, and freezing-thawing test automatic measuring apparatus using the container |
| CN101382535A (en) * | 2008-09-17 | 2009-03-11 | 东南大学 | Method for testing dough recovery of ecological type porous concrete |
| CN101788442A (en) * | 2010-01-15 | 2010-07-28 | 重庆大学 | Ultra-low temperature freeze-thaw cycle test method of cement-based material |
| CN104929489A (en) * | 2015-06-03 | 2015-09-23 | 张阳康 | Anti-mist bilayer hollow glass window |
| CN109709312A (en) * | 2018-12-10 | 2019-05-03 | 太原理工大学 | Wireless penetration controls concrete freeze thawing machine |
| CN110987748A (en) * | 2019-10-28 | 2020-04-10 | 中国科学院武汉岩土力学研究所 | Nondestructive prediction combination method for evaluating uniaxial compressive strength of rock under freeze-thaw cycle |
| CN112147177A (en) * | 2020-09-25 | 2020-12-29 | 重庆大学 | Rock freezing-thawing cycle test equipment and method for measuring circumferential strain |
| CN112647822A (en) * | 2020-12-22 | 2021-04-13 | 湖南亘晟门窗幕墙有限公司 | Door and window with air supply arrangement |
| CN213337144U (en) * | 2020-10-19 | 2021-06-01 | 兰州交通大学 | Automatic adjust freeze thawing cycle testing machine |
| CN213813610U (en) * | 2020-10-24 | 2021-07-27 | 宁夏大学 | Multifunctional road base layer mixture curing, freezing and thawing cycle all-in-one machine |
| CN114324603A (en) * | 2021-12-30 | 2022-04-12 | 长安大学 | Rock degradation testing method based on filling joint wave impedance under action of freeze-thaw cycle |
| CN114594129A (en) * | 2022-03-22 | 2022-06-07 | 山东省水利科学研究院 | Method for measuring frost resistance of concrete lining board with thickness less than 10cm |
| CN115508240A (en) * | 2022-09-29 | 2022-12-23 | 昆明理工大学 | Simulation test method for freezing and thawing cycle of half-exposed state slope rock mass |
| CN218467473U (en) * | 2022-09-27 | 2023-02-10 | 泉州凯旗玻璃有限公司 | Explosion-proof hollow glass |
-
2023
- 2023-03-02 CN CN202310190541.4A patent/CN115876634A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133009A (en) * | 1997-11-04 | 1999-05-21 | Yokohama Rika Kk | Method for testing durability of concrete sample, concrete sample container for ultrasonic measurement used in the method, and freezing-thawing test automatic measuring apparatus using the container |
| CN101382535A (en) * | 2008-09-17 | 2009-03-11 | 东南大学 | Method for testing dough recovery of ecological type porous concrete |
| CN101788442A (en) * | 2010-01-15 | 2010-07-28 | 重庆大学 | Ultra-low temperature freeze-thaw cycle test method of cement-based material |
| CN104929489A (en) * | 2015-06-03 | 2015-09-23 | 张阳康 | Anti-mist bilayer hollow glass window |
| CN109709312A (en) * | 2018-12-10 | 2019-05-03 | 太原理工大学 | Wireless penetration controls concrete freeze thawing machine |
| CN110987748A (en) * | 2019-10-28 | 2020-04-10 | 中国科学院武汉岩土力学研究所 | Nondestructive prediction combination method for evaluating uniaxial compressive strength of rock under freeze-thaw cycle |
| CN112147177A (en) * | 2020-09-25 | 2020-12-29 | 重庆大学 | Rock freezing-thawing cycle test equipment and method for measuring circumferential strain |
| CN213337144U (en) * | 2020-10-19 | 2021-06-01 | 兰州交通大学 | Automatic adjust freeze thawing cycle testing machine |
| CN213813610U (en) * | 2020-10-24 | 2021-07-27 | 宁夏大学 | Multifunctional road base layer mixture curing, freezing and thawing cycle all-in-one machine |
| CN112647822A (en) * | 2020-12-22 | 2021-04-13 | 湖南亘晟门窗幕墙有限公司 | Door and window with air supply arrangement |
| CN114324603A (en) * | 2021-12-30 | 2022-04-12 | 长安大学 | Rock degradation testing method based on filling joint wave impedance under action of freeze-thaw cycle |
| CN114594129A (en) * | 2022-03-22 | 2022-06-07 | 山东省水利科学研究院 | Method for measuring frost resistance of concrete lining board with thickness less than 10cm |
| CN218467473U (en) * | 2022-09-27 | 2023-02-10 | 泉州凯旗玻璃有限公司 | Explosion-proof hollow glass |
| CN115508240A (en) * | 2022-09-29 | 2022-12-23 | 昆明理工大学 | Simulation test method for freezing and thawing cycle of half-exposed state slope rock mass |
Non-Patent Citations (1)
| Title |
|---|
| 付小敏 等: "《室内岩石力学试验》", 西南交通大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117250219A (en) * | 2023-08-19 | 2023-12-19 | 四川大学 | Rock freeze-thawing cycle test equipment and method for monitoring frost heaving pressure and freeze-thawing damage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106680129B (en) | Rock sample recycles the simulation of dry and wet freezing-thawing and damage deterioration test device | |
| CN205826656U (en) | A kind of frozen soil freeze thawing laboratory testing rig | |
| CN106370816B (en) | It is a kind of can dynamic testing soil dehumidification/frozen water content variation characteristic pilot system | |
| CN108956412B (en) | Method for determining freeze-thaw damage degree of rock in high altitude cold region | |
| CN109668922B (en) | Monitoring device for frozen soil model test and using method thereof | |
| CN111198136A (en) | Rock mass ice crack network frost heaving expansion process monitoring test system and method | |
| CN103852383B (en) | Based on same condition simulation maintenance test method and inverse modeling maintenance test method and the system of temperature stress test | |
| CN206523391U (en) | Rock sample circulation dry and wet freezing-thawing simulation and damage deterioration test device | |
| CN115876634A (en) | Rock freezing-thawing cycle degradation overall process multi-channel test equipment and test method | |
| CN108827853B (en) | Nuclear magnetic resonance-based tight reservoir rock electric measurement device and measurement method | |
| CN108956961A (en) | Agent on crack resistance of concrete ice water erosion property experimental rig and test method | |
| CN104460788B (en) | Constant temperature and constant humidity deformeter | |
| CN112255258A (en) | Monitoring system and method for sample freeze-thaw cycle experiment | |
| CN206132756U (en) | Soil releasing of moisture and freeze characteristic integrated test device | |
| CN203587587U (en) | Real-time online testing device of saturated rock frost heaving force | |
| CN211374759U (en) | Fiber concrete early-age shrinkage crack test device | |
| CN112033886A (en) | Rock soil test block erosion box | |
| CN101382535A (en) | Method for testing dough recovery of ecological type porous concrete | |
| CN110044816A (en) | Blade of wind-driven generator icing cohesive force simulated testing system and analog detection method | |
| CN115236115A (en) | Testing device and method for simulating slope erosion in freeze-thaw cycle | |
| CN111272604A (en) | Device and method for monitoring freezing and thawing process of seasonal frozen soil | |
| CN208984125U (en) | A kind of quick detection device of Portable, multiple parameter grain feelings | |
| CN111610131B (en) | Soil porosity nondestructive testing device and method thereof | |
| CN113640496B (en) | Swelling-shrinking-crack measuring device in soil body dry-wet circulation | |
| CN113406136A (en) | Device and method for detecting freezing resistance of material by using gas freezing and gas melting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230331 |