CN115144429A - Deep saturated soft tailing undisturbed sample frost heaving test system and method - Google Patents
Deep saturated soft tailing undisturbed sample frost heaving test system and method Download PDFInfo
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- CN115144429A CN115144429A CN202211061298.8A CN202211061298A CN115144429A CN 115144429 A CN115144429 A CN 115144429A CN 202211061298 A CN202211061298 A CN 202211061298A CN 115144429 A CN115144429 A CN 115144429A
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- 238000007710 freezing Methods 0.000 claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 9
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- 241001330002 Bambuseae Species 0.000 claims abstract description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 9
- 239000011425 bamboo Substances 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000005057 refrigeration Methods 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
Abstract
The invention provides a frost heaving test system and method for an undisturbed sample of deep saturated soft tailings, which are used for solving the problems that a tailing freezing test device in the prior art is complicated in operation steps, cannot know the condition of a tailing sample in real time, and does not pressurize the tailing sample in the freezing process; the method comprises the following steps: the device comprises a freezing box, a sampler, a loading system and an observation system; the refrigerator comprises a refrigerator body, a refrigerating assembly and a temperature monitoring assembly, wherein the refrigerating assembly is used for refrigerating the interior of the refrigerator body, and the temperature monitoring assembly is used for monitoring temperature change in the refrigerator body; the loading system includes constant voltage subassembly, pressurization section of thick bamboo and pressurization piece, two the pressurization section of thick bamboo symmetry fixed mounting respectively the both ends of sampler, the pressurization piece with pressurization section of thick bamboo sliding fit, the pressurization piece with the pressurization section of thick bamboo forms airtight space, the constant voltage subassembly is used for control gas in the airtight space keeps invariable pressure.
Description
Technical Field
The invention belongs to the technical field of tailings sandy soil testing, and particularly relates to a frost heaving test system and method for an undisturbed sample of deep saturated soft tailings.
Background
After tailing sampling is finished, a plurality of parameters of a tailing sample need to be measured and analyzed, due to the limitation of field conditions, test equipment such as a dynamic triaxial test device, a high-pressure static triaxial test device, a resonance column and the like cannot be moved to a tailing dam field, hundreds of pieces of original-state soil of tailings need to be moved to an indoor test room for testing, and the problem that the original-state property of the sample needs to be maintained in long-distance transportation is solved because the structural strength among tailing grains is low. In order to maintain the original shape of the sample, the original sample is usually frozen, transported in a frozen state, and thawed after arriving at an experimental site, so that the sample can be prevented from being damaged in the transportation process, and the original shape of the sample is maintained to the maximum extent.
However, in the prior art, the tailing sample which is just collected is directly placed into a refrigerator for freezing, the refrigerator is opened at regular time to observe and record the freezing condition, the steps are complicated, the condition of the sample cannot be known in real time, and meanwhile, the tailing sample is not pressurized.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a frost heaving test system and method for an undisturbed sample of deep saturated soft tailings, which are used to solve the problems that the operation steps of a tailings freezing test device in the prior art are complicated, the tailings sample cannot be known in real time, and the tailings sample is not pressurized in the freezing process.
In order to achieve the above objects and other related objects, the present invention provides a frost heaving test system for undisturbed samples of deep saturated soft tailings, comprising: the device comprises a freezing box, a sampler, a loading system and an observation system; the refrigerator comprises a refrigerator body, a refrigerating assembly and a temperature monitoring assembly, wherein the refrigerating assembly is used for refrigerating the interior of the refrigerator body, and the temperature monitoring assembly is used for monitoring temperature change in the refrigerator body; the sampler is filled with a tailing sample and is placed inside the box body;
the loading system comprises a constant pressure assembly, a pressurizing cylinder and pressurizing parts, wherein the two pressurizing cylinders are symmetrically and fixedly arranged at two ends of the sampler respectively, the pressurizing parts are arranged in the pressurizing cylinders and are in sliding fit with the pressurizing cylinders, the pressurizing parts are in contact with tailing samples in the sampler, the pressurizing parts and the pressurizing cylinders form a closed space, and the constant pressure assembly is used for controlling gas in the closed space in the pressurizing cylinders to keep constant pressure;
the observation system comprises a camera and a light source, the pressurizing cylinder is of a transparent structure, the pressurizing cylinder is located in the shooting range of the camera, the light source is arranged inside the box body, and the light source provides illumination for the camera.
Optionally, the refrigeration assembly comprises a refrigeration pipeline and a refrigerator, the refrigeration pipeline is arranged inside the box body, and negative-temperature circulating liquid generated by the refrigerator is circularly transmitted in the refrigeration pipeline.
Optionally, the temperature monitoring assembly comprises a plurality of temperature sensors, and the temperature sensors are arranged inside the box body and in the tailing samples.
Optionally, the constant pressure assembly includes a constant pressure cylinder, a piston and a loading plate, the piston is disposed in the constant pressure cylinder, the piston and the constant pressure cylinder are in sliding fit, the constant pressure cylinder is communicated with the enclosed space, and the piston and the loading plate are fixedly connected through a piston rod.
Optionally, the constant pressure assembly further comprises a guide rod, a guiding direction of the guide rod is parallel to a sliding direction of the piston, the loading plate is in sliding fit with the guide rod, and the guide rod is fixedly connected with the constant pressure cylinder.
Optionally, a length scale is arranged on the pressurizing cylinder.
Optionally, one group of the constant pressure components is simultaneously communicated with the closed spaces in the pressurizing cylinders at two ends of a plurality of groups of the tailings samples.
Optionally, add the pressure member with be provided with the elasticity seal membrane between the tailing sample, the elasticity seal membrane with add pressure cylinder fixed connection, add the pressure member and form by the concatenation of a plurality of annular sliding ring, it is adjacent annular sliding ring sliding fit, the outermost circle annular sliding ring with add pressure cylinder sliding fit.
Optionally, the device further comprises an air-filling device, the air-filling device comprises an air pump and a valve, the air pump is communicated with the constant-pressure cylinder, and the valve is arranged between the air pump and the constant-pressure cylinder.
Optionally, a barometer is arranged on the constant-pressure barrel and used for measuring the pressure in the constant-pressure barrel.
A method for frost heaving of an undisturbed sample of deep saturated soft tailings comprises the following steps:
and (3) a pressurizing and freezing step: sleeving the pressurizing cylinders at two ends of the sampler, arranging a plurality of freezing boxes, placing the same number of tailing samples in each freezing box, numbering the tailing samples from 1, introducing gas into a communicated closed system through a gas filling device, enabling the pressurizing pieces to be tightly attached to the tailing samples, closing a valve, preventing gas in the closed system from leaking, placing weights with different masses on the loading plates of each group of constant pressure components, closing covers of the box bodies, starting refrigeration components to refrigerate the tailing samples in the box bodies, wherein the refrigeration temperatures in the freezing boxes are different;
and (3) observation: and presetting shooting time, wherein when the preset time is reached, the light source automatically lights up, the camera shoots the pressurizing cylinder, and the frost heaving degree of the tailing sample is observed by taking pictures through the camera.
As described above, the system and the method for frost heaving test of undisturbed samples of deep saturated soft tailings have at least the following beneficial effects:
1. and the tailing sample is placed into the freezing box together with the sampler for freezing, so that disturbance to the tailing sample is reduced, and the constant pressure component is used for controlling the gas in the pressurizing cylinder to keep constant pressure, so that the pressurizing piece is always subjected to constant gas pressure in the moving process, and the pressurizing piece provides constant pressure to the tailing sample.
2. When the tailing sample is frozen and swelled, the tailing sample expands to push the pressurizing piece to move in the pressurizing cylinder, and the camera shoots the expansion condition of the tailing sample in the pressurizing cylinder due to the fact that the pressurizing cylinder is of a transparent structure.
3. By adding a weight to the pressurizing member, the pressurizing member provides a certain pressure to the gas in the constant pressure cylinder through the piston, and the gas pressure in the constant pressure cylinder is kept constant under the condition that the weight on the pressurizing member is not changed.
4. Because the sampler both ends all are provided with the pressurization section of thick bamboo, two the pressurization section of thick bamboo all with same constant voltage section of thick bamboo intercommunication guarantees the sampler both ends the tailing sample receives the pressure of equidimension.
Drawings
FIG. 1 shows a schematic perspective structure diagram of a frost heaving test system for an undisturbed sample of deep saturated soft tailings in the invention;
FIG. 2 is a top view of the original-state sample frost heaving test system for deep saturated soft tailings in the invention;
FIG. 3 is a sectional view showing a structure of a coupling relationship between the soil sampler, the pressurizing cylinder and the pressurizing member in the present invention;
FIG. 4 is a perspective view of a constant voltage assembly according to the present invention;
FIG. 5 is a schematic diagram showing a state that a box cover is covered on the deep saturated soft tailing undisturbed sample frost heaving test system in the invention;
FIG. 6 is a sectional view showing a structure of a connection relationship of the soil sampler, the pressurizing cylinder, the elastic sealing film and the annular slip ring according to the present invention.
Description of element labels:
1. a freezer; 101. a box body; 102. a box cover; 2. a sampler; 3. a tailing sample; 401. a constant voltage component; 4011. a weight; 4012. a constant pressure cylinder; 4013. a piston; 4014. a loading plate; 4015 guide rods, 4016, piston rods; 402. a pressurizing cylinder; 403. a pressing member; 4031. an annular slip ring; 404. an elastic sealing film; 5. an observation system; 501. a camera; 502. a light source; 6. and (4) connecting the pipes.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 6. It should be understood that the structures, ratios, sizes, etc. shown in the drawings are only used for matching the disclosure of the present disclosure to be understood and read by those skilled in the art, and are not used to limit the conditions of the present disclosure, so that the present disclosure is not limited to the essential meanings in the technology, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the present disclosure without affecting the functions and the achievable objects of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1-6, the invention provides a frost heaving test system for an undisturbed sample of deep saturated soft tailings, which includes: the device comprises a freezing box 1, a sampler 2, a loading system and an observation system 5; the freezing box 1 comprises a box body 101, a box cover 102, a refrigerating assembly and a temperature monitoring assembly, wherein the refrigerating assembly is used for refrigerating the interior of the box body 101, and the temperature monitoring assembly is used for monitoring temperature change in the box body 101; fill in the sampler 2 and have tailing sample 3, sampler 2 is placed inside box 101, sampler 2 follows after taking out tailing sand sample on the tailing dam, with the sand cleaning and flattening at 2 both ends of sampler to sampler 2 process of taking is gently taken and is put, prevents that tailing sand from destroying its inner structure owing to the process of taking vibrations.
The loading system comprises a constant pressure assembly 401, a pressurizing cylinder 402 and a pressurizing part 403, wherein the two pressurizing cylinders 402 are symmetrically and fixedly arranged at two ends of the sampler 2 respectively, the pressurizing part 403 is arranged inside the pressurizing cylinder 402, the pressurizing part 403 is in sliding fit with the pressurizing cylinder 402, the pressurizing part 403 is in contact with a tailing sample 3 in the sampler 2, the pressurizing part 403 and the pressurizing cylinder 402 form a closed space, and the constant pressure assembly 401 is used for controlling the gas in the closed space in the pressurizing cylinder 402 to keep constant pressure;
the observation system 5 includes a camera 501 and a light source 502, the pressing cylinder 402 is a transparent structure, the pressing cylinder 402 is in a shooting range of the camera 501, the light source 502 is disposed inside the box 101, the light source 502 provides illumination for the camera 501, the light source 502 may be a parallel light source 502, and the light source 502 can illuminate the whole inside of the box 101.
The tailings sample 3 is put into the freezing box 1 together with the sampler 2 for freezing, disturbance to the tailings sample 3 is reduced, the constant pressure component 401 controls the gas in the pressurizing cylinder 402 to maintain constant pressure, so that the pressurizing member 403 is always subjected to constant gas pressure during movement, so that the pressurizing member 403 provides constant pressure to the tailings sample 3, when the tailings sample 3 is frozen and bloated, the tailings sample 3 expands to push the pressurizing member 403 to move in the pressurizing cylinder 402, and the camera 501 photographs the situation that the tailings sample 3 expands in the pressurizing cylinder 402 due to the transparent structure of the pressurizing cylinder 402.
In this embodiment, referring to fig. 1 and fig. 2, the refrigeration assembly includes a refrigeration pipeline and a refrigerator, the refrigeration pipeline is disposed inside the box 101, negative temperature circulation fluid generated by the refrigerator is circularly transmitted in the refrigeration pipeline, heat in the box 101 is taken away through circulation of the negative temperature circulation fluid, so that the temperature of the box 101 is reduced, and the temperature of the negative temperature circulation fluid conveyed by the refrigerator is controlled to control the temperature in the box 101.
In this embodiment, referring to fig. 1 to 5, the temperature monitoring assembly includes a plurality of temperature sensors, the temperature sensors are disposed in the box 101 and the tailing sample 3, the temperature sensors are disposed at the center and the edge of the tailing sample 3, and the temperature change condition in the box 101 is known in real time according to information transmitted by the temperature sensors.
In this embodiment, referring to fig. 1 to 5, the constant pressure assembly 401 includes a constant pressure cylinder 4012, a piston 4013, and a loading plate 4014, the piston 4013 is disposed in the constant pressure cylinder 4012, the piston 4013 is slidably engaged with the constant pressure cylinder 4012, the constant pressure cylinder 4012 is communicated with the enclosed space through a connection pipe 6, and the piston 4013 is fixedly connected with the loading plate 4014 through a piston rod 4016. By adding a weight to the pressure member 403, the pressure member 403 provides a certain pressure to the gas in the constant pressure cylinder 4012 through the piston 4013, and the gas pressure in the pressure cylinder 402 will be kept constant without changing the weight on the pressure member 403, so as to provide a constant pressure to the tailing sample 3.
In this embodiment, referring to fig. 1 and fig. 2, the constant pressure assembly 401 further includes a guide rod 4015, a guiding direction of the guide rod 4015 is parallel to a sliding direction of the piston 4013, the loading plate 4014 is in sliding fit with the guide rod 4015, and the guide rod 4015 is fixedly connected to the constant pressure cylinder 4012. The stability of the loading plate 4014 is enhanced.
In this embodiment, referring to fig. 1 to 3, length scales are provided on the pressurizing cylinder 402, and the frost heaving degree of the tailings sample 3 can be visually observed through the length scales.
In this embodiment, referring to fig. 1 to fig. 3, one group of the constant pressure assembly 401 is communicated with the closed spaces in the pressurizing cylinders 402 at two ends of the several groups of the tailing samples 3, so as to pressurize the several groups of the tailing samples 3 simultaneously.
In this embodiment, referring to fig. 1 to 5, a plurality of groups of the freezing boxes 1 are simultaneously arranged, the temperature in each group of the freezing boxes 1 is different, and the same number of tailing samples 3 are placed in each freezing box 1, and batch experiments are performed at the same time.
In this embodiment, referring to fig. 1 and 6, an elastic sealing film 404 is disposed between the pressure member 403 and the tailings sample 3, the elastic sealing film 404 is fixedly connected to the pressure cylinder 402, the elastic sealing film can prevent gas in the pressure cylinder from entering the tailings sample 3, and at the same time, the expansion of the tailings sample 3 is not affected, the pressure member 403 is formed by splicing a plurality of annular slip rings 4031, adjacent annular slip rings 4031 are in sliding fit, and the outermost annular slip ring 4031 is in sliding fit with the pressure cylinder 402. The central annular slip ring 4031 is a cylinder, the other annular slip rings 4031 are annular, and the tailing sample 3 is cylindrical, so that the tailing sample 3 is deformed from outside to inside in the freezing process, the tailing sample is also deformed, when the tailing sample 3 is frozen and deformed, the annular slip ring 4031 is pushed to move, and the deformation conditions and the deformation sequence of different positions of the tailing sample 3 from an axis can be known through the movement condition of the annular slip ring 4031.
In this embodiment, please refer to fig. 1 and 2, further comprising an air-adding device, wherein the air-adding device comprises an air pump and a valve, the air pump is communicated with the constant pressure cylinder 4012, and the valve is arranged between the air pump and the constant pressure cylinder 4012 to supplement air for a closed system formed between the constant pressure cylinder 4012 and the pressurizing cylinder 402.
In this embodiment, referring to fig. 1 and fig. 2, an air pressure gauge is disposed on the constant pressure cylinder 4012, and the air pressure gauge is configured to measure a pressure in the constant pressure cylinder 4012, and the pressure applied to the tailings sample 3 can be calculated according to the displayed pressure of the air pressure gauge.
A method for frost heaving of an undisturbed sample of deep saturated soft tailings comprises the following steps:
and (3) a pressurizing and freezing step: sleeving the pressurizing cylinder 402 at two ends of the sampler 2, arranging a plurality of freezing boxes 1, putting the same number of tailing samples 3 into each freezing box 1, numbering the samples from 1, communicating the pressurizing cylinders 402 at two ends of the tailing samples 3 with the same number in each freezing box 1 with the pressurizing cylinders 402 on the same group of constant pressure components 401, introducing gas into the communicated closed system through a gas filling device to enable the pressurizing pieces 403 to cling to the tailing samples 3, closing valves to prevent gas leakage in the closed system, putting heavy objects with different masses onto the loading plates 4014 of each group of constant pressure components 401, closing the covers of the boxes 101, and starting refrigerating components to refrigerate the tailing samples 3 in the boxes 101, wherein the temperatures in each freezing box 1 are different.
In the freezing boxes 1 ensuring different temperatures, the tailings samples 3 with the same number are subjected to the same pressure. Meanwhile, in the same freezing box 1, tailings samples 3 with different pressures are frozen at the same temperature.
And (3) observation: and (3) presetting shooting time, when the preset time is reached, the light source 502 automatically lights up, the camera 501 shoots the pressurizing cylinder 402, and the frost heaving degree of the tailing sample 3 is observed by taking pictures through the camera 501.
In summary, the tailing sample 3 is placed in the freezing chamber 1 together with the sampler 2 for freezing, disturbance to the tailing sample 3 is reduced, and the constant pressure assembly 401 controls the gas in the pressurizing cylinder 402 to maintain a constant pressure, so that the pressurizing member 403 is always subjected to a constant gas pressure during the movement, and thus the pressurizing member 403 provides a constant pressure to the tailing sample 3.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a saturated soft tailing original state appearance frost heaving test system in deep which characterized in that includes:
a freezing box is arranged in the freezing box,
the refrigerator comprises a refrigerator body, a refrigerating assembly and a temperature monitoring assembly, wherein the refrigerating assembly is used for refrigerating the interior of the refrigerator body, and the temperature monitoring assembly is used for monitoring temperature change in the refrigerator body;
the sampling device is used for sampling the sample,
the sampler is filled with a tailing sample and is placed inside the box body;
the system is loaded on the basis of the system,
the loading system comprises a constant pressure component, a pressurizing cylinder and a pressurizing part, the two pressurizing cylinders are respectively and symmetrically and fixedly arranged at two ends of the sampler, the pressurizing part is arranged in the pressurizing cylinder, the pressurizing part is in sliding fit with the pressurizing cylinder, the pressurizing part and the pressurizing cylinder form a closed space, and the constant pressure component is used for controlling gas in the closed space to keep constant pressure;
an observation system is arranged on the base station,
the observation system comprises a camera and a light source, the pressurizing cylinder is of a transparent structure, the pressurizing cylinder is located in the shooting range of the camera, the light source is arranged inside the box body, and the light source provides illumination for shooting of the camera.
2. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 1, wherein the deep saturated soft tailings undisturbed sample frost heaving test system comprises: the refrigerating assembly comprises a refrigerating pipeline and a refrigerator, the refrigerating pipeline is arranged inside the box body, and negative temperature circulating liquid generated by the refrigerator is circularly transmitted in the refrigerating pipeline.
3. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 2, wherein: the temperature monitoring assembly comprises a plurality of temperature sensors, and the temperature sensors are arranged inside the box body and in the tailing samples.
4. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 1, wherein the deep saturated soft tailings undisturbed sample frost heaving test system comprises: the constant pressure assembly comprises a constant pressure cylinder, a piston and a loading plate, the piston is arranged in the constant pressure cylinder, the piston is in sliding fit with the constant pressure cylinder, the constant pressure cylinder is communicated with the closed space in the pressurizing cylinder, and the piston is fixedly connected with the loading plate through a piston rod.
5. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 4, wherein the deep saturated soft tailings undisturbed sample frost heaving test system comprises: the constant pressure assembly further comprises a guide rod, the guide direction of the guide rod is parallel to the sliding direction of the piston, the loading plate is in sliding fit with the guide rod, and the guide rod is fixedly connected with the constant pressure cylinder.
6. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 4, wherein: each group of constant pressure components is simultaneously communicated with the closed spaces in the pressurizing cylinders at two ends of a plurality of groups of tailing samples.
7. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 1, wherein: the pressurization piece with be provided with the elasticity seal membrane between the tailing sample, the elasticity seal membrane with pressurization section of thick bamboo fixed connection, the pressurization piece is formed by a plurality of annular sliding rings concatenation, and is adjacent annular sliding ring sliding fit, the outermost circle annular sliding ring with pressurization section of thick bamboo sliding fit.
8. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 4, wherein: the loading system further comprises an air filling device, the air filling device comprises an air pump and a valve, the air pump is communicated with the constant-pressure cylinder, and the valve is arranged between the air pump and the constant-pressure cylinder.
9. The deep saturated soft tailings undisturbed sample frost heaving test system of claim 8, wherein: the constant pressure cylinder is provided with a barometer, and the barometer is used for measuring the pressure of the gas in the constant pressure cylinder.
10. A method for frost heaving of an undisturbed sample of deep saturated soft tailings is characterized by comprising the following steps: the deep saturated soft tailing undisturbed sample frost heaving test system applicable to the claim 9 comprises the following steps:
and (3) a pressurizing and freezing step: sleeving the pressurizing cylinders at two ends of the sampler, arranging a plurality of freezing boxes, placing the same number of tailing samples in each freezing box, numbering the tailing samples from 1, introducing gas into a communicated closed system through a gas filling device, enabling the pressurizing pieces to be tightly attached to the tailing samples, closing a valve, preventing gas in the closed system from leaking, placing weights with different masses on the loading plates of each group of constant pressure components, closing covers of the box bodies, starting refrigeration components to refrigerate the tailing samples in the box bodies, wherein the refrigeration temperatures in the freezing boxes are different;
and (3) observation: and presetting shooting time, wherein when the preset time is reached, the light source automatically lights up, the camera shoots the pressurizing cylinder, and the frost heaving degree of the tailing sample is observed by taking pictures through the camera.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211061298.8A CN115144429B (en) | 2022-09-01 | 2022-09-01 | Deep saturated soft tailing undisturbed sample frost heaving test system and method |
| JP2023082651A JP7299440B1 (en) | 2022-09-01 | 2023-05-19 | Deep Saturated Soft Tailing Raw Sample Freeze Expansion Test System and Method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP7299440B1 (en) | 2023-06-27 |
| JP2024035059A (en) | 2024-03-13 |
| CN115144429B (en) | 2022-11-11 |
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