CN114858548A - Clay liquid-plastic limit combined determination method and determination system - Google Patents
Clay liquid-plastic limit combined determination method and determination system Download PDFInfo
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- CN114858548A CN114858548A CN202210420386.6A CN202210420386A CN114858548A CN 114858548 A CN114858548 A CN 114858548A CN 202210420386 A CN202210420386 A CN 202210420386A CN 114858548 A CN114858548 A CN 114858548A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
Abstract
The invention discloses a clay liquid-plastic limit joint measurement method and a clay liquid-plastic limit joint measurement system, which relate to the technical field of soil sample detection and have the technical scheme key points that: the method comprises the following steps: 1) preparing a soil sample to be detected: preparing a plurality of soil samples to be detected with different water contents by adopting a soil sample preparation method with standard water content, wherein the water contents of the soil samples are within the range of plastic limit and liquid limit; 2) filling a soil sample to be tested: extruding the soil sample to be measured from the mud mixing bag, and directly placing the soil sample in a soil containing cup for measurement to obtain a soil sample; 3) and (3) testing a soil sample: and (4) determining the soil sample by adopting a liquid-plastic limit combined determination instrument to obtain w-d data of the soil sample with different water contents, and drawing a w-d graph of the clay. The method adopts a technical means of preparing the sample by controlling the water content, the water content of the soil sample is accurately controlled, the manufacturing period of the soil sample is short, real-time data can be provided for judging the reliability of the test result in time, and the working efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of soil sample detection, in particular to a soil sample preparation method with standard water content, a clay liquid-plastic limit combined determination method and a clay liquid-plastic limit combined determination system.
Background
The water content w of the soil and the standard cone sinking depth d are expressed by an experimental law (w-d law): the water content w (%) of the soil and the sinking depth d (mm) of the standard cone are in a linear relation in the liquid-plastic limit interval and the interval of the soil. Water content w of clay<w p When the soil body is solid, and w>w l Is liquid when in use, and is only in the water content area w l <w<w p Obey the w-d law. The liquid-plastic limit of the underground clay is an important characteristic index of civil engineering underground engineering, and has great significance for accurately measuring and obtaining the liquid-plastic limit index of the clay.
In the process of measuring the liquid limit and the plastic limit of the soil sample, a liquid-plastic limit combined measuring method is generally adopted for measuring, the cone penetration depth of the soil sample at three different water contents is measured by a photoelectric liquid limit and plastic limit combined measuring instrument, and a relation straight line between the cone penetration depth and the water content is drawn on a log-log graph paper. And (4) according to the standard of the test method, checking a corresponding value of the cone penetration depth on the straight line, wherein the water content at the corresponding value is the liquid limit and the plastic limit of the soil sample.
In the test process, a soil sample with natural water content is generally adopted, or air-dried soil is prepared for detection; before the test, a soil sample needs to be wetted in advance, and the soil sample is subjected to configuration of certain water content; then, subsequent filling and cone falling tests can be carried out on the soil sample; and finally, drying the soil sample for a long time again, weighing the soil sample again after the soil sample is fully dried, and measuring the water content of the soil sample.
In the test process, the control of the water content of the soil sample is difficult, the water content of the soil sample needs to be manually allocated in the early stage and the follow-up stage, the test steps are complicated, the time consumption is long, the test efficiency is influenced, and especially for a large-scale test, the time consumption is high; in addition, in the operation process, the interference degree of human factors is increased, and the accuracy of test detection is also influenced.
In the process of mixing and stirring the soil sample, the soil sample is continuously exposed in the air environment, and along with the mixing action, the moisture in the soil sample is evaporated, so that the moisture content in the soil sample is changed, a certain error is generated for the measurement of the required moisture content, and the precision and the accuracy of a subsequent test are influenced.
Especially for clay soil sample, it contains the sand grain very few, has stronger stickness, and the inside granule of soil sample bonds closely, and in stirring mixing stirring process, moisture is difficult to pass through from it, leads to being difficult to with clay soil sample and water homogeneous mixing. Adopt agitated vessel to carry out the auxiliary mixing in-process, because the characteristic of clay, the soil sample will adhere on agitated vessel's internal perisporium and stirring paddle leaf, lead to mixing efficiency low, can't reach effective homogeneous mixing's effect moreover.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The invention aims to solve the problems and provide a clay liquid-plastic limit joint measurement method.
The technical purpose of the invention is realized by the following technical scheme: a method for preparing a soil sample with standard water content comprises the following steps:
s1 early dry soil preparation: drying a soil sample to be detected to obtain a dry soil sample, placing the dry soil sample in a closed container, crushing and sieving to obtain dry soil, and storing the obtained dry soil in a sealed moisture-proof container;
s2 quantitative water adding of the soil sample: filling a dry soil sample into a flexible mud mixing bag, and injecting a proper amount of water into the mud mixing bag according to the filling quality of the dry soil sample and the water content of the soil sample required to be prepared; sealing the opening of the mud mixing bag to obtain a closed mud mixing bag;
s3 soil sample muddy water homogenization: and kneading the mud mixing bag, and uniformly mixing the mud and the water in the mud mixing bag to obtain the soil sample with the required water content to be measured.
Preferably, the method comprises the following steps: in the drying process of the soil sample to be tested in the step S1, firstly, separating the collected soil into small blocks, and placing the small blocks in a drying device for primary drying; before the soil sample is completely dehydrated and hardened, taking out the soil sample, reducing the temperature, crushing, and then placing the soil sample in drying equipment to be continuously dried until the soil sample is completely dehydrated to obtain dry soil; in the crushing and sieving process, the dry soil sample is sieved by a sieve with the aperture of 0.5 mm.
Preferably, the method comprises the following steps: the mud mixing bag is of a flexible bag-shaped structure and is provided with at least one opening; in the process of sealing the opening of the mud mixing bag, redundant gas in the mud mixing bag is discharged, and then the opening is sealed by adopting a sealing device.
Preferably, the method comprises the following steps: in the process of filling the dry soil sample in the step S2, the mud mixing bag is placed on an electronic scale for weighing, and the water adding amount is quantified according to the mass and the water content of the dry soil sample weighed by the electronic scale.
Preferably, the method comprises the following steps: in step S3, kneading the mud mixing bag with a mud mixing device, where the mud mixing device includes an upper press plate and a lower press plate that can be adjusted up and down relatively, and a gap for clamping the mud mixing bag is formed between the upper press plate and the lower press plate; the upper pressing plate and the lower pressing plate can move relatively to rub the mud mixing bag.
Preferably, the method comprises the following steps: in step S3, the mud mixing bag is kneaded by using the mud mixing device, the mud mixing bag is taken out from the kneading gap, and the mud and water are beaten in the beating barrel to mix the mud and water.
The invention also provides a clay liquid-plastic limit joint measurement method, which comprises the following steps:
1) preparing a soil sample to be detected: preparing a plurality of soil samples to be tested with different water contents by adopting the soil sample preparation method with standard water content according to claims 1-6, wherein the water contents of the soil samples are within the range of the plastic limit and the liquid limit;
2) filling a soil sample to be tested: extruding the soil sample to be measured from the mud mixing bag, and directly placing the soil sample in a soil containing cup for measurement to obtain a soil sample;
3) and (3) testing a soil sample: and (4) determining the soil sample by adopting a liquid-plastic limit combined determination instrument to obtain w-d data of the soil sample with different water contents, and drawing a w-d graph of the clay.
Preferably, the method comprises the following steps: in the step 2), the soil sample filled in the soil containing cup slightly protrudes out of the plane of the upper end opening of the soil containing cup, and after filling is finished, the soil sample is placed on a vibrator to compact the soil sample; removing the redundant soil, and scraping the upper surface of the soil containing cup.
The invention also provides a clay liquid-plastic limit combined measuring system, which comprises: the mud mixing bag is of a flexible bag-shaped structure for containing mud and water, and is provided with a closable opening; the sealing device is used for sealing the opening of the mud mixing bag; the metering device comprises an electronic scale for weighing the total weight of the mud mixing bag; the mud mixing device is used for kneading and mixing mud for the mud mixing bag and comprises an upper pressing plate and a lower pressing plate which can be relatively adjusted up and down, and a gap for clamping the mud mixing bag is formed between the upper pressing plate and the lower pressing plate; the upper pressing plate and the lower pressing plate can move relatively to rub the mud mixing bag; and the liquid-plastic limit combined determinator is used for detecting the w-d point data of the soil sample.
Preferably, the method comprises the following steps: the metering device also comprises a liquid pump, and the liquid pump is used for injecting water into the mud mixing bag through a pipeline; the device also comprises a control unit which is used for drawing a w-d graph of the soil sample according to the w-d point data of each soil sample.
Preferably, the method comprises the following steps: the control unit is coupled with the liquid-plastic limit joint determinator and used for recording the liquid-plastic limit joint determinator and controlling the water injection amount according to the dry soil quality and the water content; the control unit is coupled with the liquid pump and used for controlling the liquid pump to inject water quantitatively.
In conclusion, the invention has the following beneficial effects:
according to the invention, the dry soil water mixing method is completed in a closed space, the soil sample and water in the mixing process are hermetically coated by adopting the flexible mud mixing bag, the mixing and homogenizing process is carried out in a closed state, the time for exposing mud water in an air environment is short, the error problem that the water content of the soil sample is uncertain due to water evaporation in the mud and water mixing process is reduced, and the influence of the temperature and the humidity of the environment in the mixing process is avoided.
Adopt the sealed cladding mixed mode of muddy mud bag, can be with between the less space range of soil and water restriction, through the mode of kneading, can make mud, water intensive mixing to mix among the mixing process muddy mud bag and can produce the elastic extrusion to inside mixture, further to the promotion of mud, water mixed effect.
In the process of mixing dry soil with water, the dry soil and the water can be controlled by adopting a weighing mode, and the soil sample with accurate water content can be directly proportioned and mixed by matching with a subsequent mud mixing bag, so that the detection and preparation accuracy of the soil sample are improved.
In the clay liquid-plastic limit combined measurement, the soil sample only needs to be dried at the previous stage, the water content of the soil sample can be directly and accurately controlled in the soil sample preparation process, and the distinguishing effect on the water content of different point positions is good; and after the cone falling test, the step of secondary drying is not needed, the manufacturing period of the patterns with different water contents is short, the two-dimensional point coordinates of the w-d graph can be rapidly obtained in the detection process of the sinking depth of the cone every time, real-time data can be provided for timely judging the reliability of the test result, and the working efficiency is greatly improved.
The automatic auxiliary device can automatically assist the soil sample through the steps of rolling, vibrating and the like of the automatic mechanical device, the microcomputer control device of the control unit operates, the consistency of the amplitude, the speed and the time of the action process can be controlled, and the error problem of the mud water homogenization degree and the compaction degree of the soil sample caused by personal difference, manipulation difference and force difference is solved.
Drawings
FIG. 1 is a schematic structural diagram of a clay liquid-plastic limit joint measurement system according to the present invention;
fig. 2 is a schematic structural view of the mud mixing bag of the present invention.
1. Mixing a mud bag; 2. an opening; 3. a metering device; 31. an electronic scale; 32. a liquid pump; 33. a funnel; 4. a mud mixing device; 41. an upper pressure plate; 42. a lower pressing plate; 43. a gap; 44. a motor; 45. a lifting rod; 5. a liquid plastic limit combined tester; 6. a control unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment discloses a method for preparing a soil sample with standard water content, which comprises the following steps:
s1 early dry soil preparation: collecting soil to be detected, dividing the soil into small blocks, and drying the soil; in the soil sample drying process, firstly placing the soil sample into a drying device for primary drying, taking out the soil sample before the soil sample is completely dehydrated and hardened, cooling and then crushing the soil sample, and then placing the soil sample into drying equipment for continuous drying until the soil sample is completely dehydrated to obtain crushed dry soil;
placing the dried soil sample in a closed container, crushing, and sieving by using a screen with the aperture of 0.5mm to obtain the required dried soil sample; and storing the prepared dry soil sample in a sealed moisture-proof container for later use.
S2 quantitative water adding of the soil sample: adopt and mix mud bag 1 and mix soil sample, this mix mud bag 1 is for having flexible saccular structure, generally has an opening 2, can adopt the rubber bag structure of similar balloon for example, has better flexibility, toughness, can be convenient for subsequent seal and knead the action.
Filling dry soil into the mud mixing bag 1 through a funnel 33, wherein the filling amount of the dry soil is generally twice of that required by the test; injecting a proper amount of water into the mud mixing bag 1 according to the filling quality of the dry soil sample and the water content of the soil sample required to be prepared; and discharging redundant gas in the mud mixing bag 1, and sealing the opening 2 by using a sealing device to obtain the sealed mud mixing bag 1.
In the process of filling the dry soil sample, the mud mixing bag 1 is placed on a metering device 3 for metering, and the metering device 3 comprises an electronic scale 31 with digital display and a liquid pump 32; the data interface of the electronic scale 31 is connected with the microcomputer of the control unit 6, and can determine the serial number of the test measurement and the required water content according to the pre-stored record; the liquid pump 32 is coupled to the control unit 6, and the microcomputer can control the liquid pump 32 to inject water into the mud mixing bag 1 in a fixed amount.
The mud mixing bag 1 is placed on an electronic scale 31 for weighing, and the water adding amount is quantified according to the dry soil sample mass and the water content weighed by the electronic scale. The microcomputer controls the automatic starting liquid pump 32 to slowly inject water into the mud mixing bag 1, the electronic scale 31 monitors the weight of the mud mixing bag 1 in real time, and after the water quantity required by a preset value is reached, the system controls the liquid pump 32 to stop injecting water, so that accurate water content preparation is obtained.
S3 soil sample muddy water homogenization: kneading the mud mixing bag 1, and uniformly mixing mud and water in the mud mixing bag 1 to obtain the soil sample with the required water content to be measured. Firstly, kneading the mud mixing bag 1 by adopting the mud mixing device 4, taking out the mud mixing bag 1 from the kneading gap 43, beating in the beating barrel, and further mixing mud water.
The mud mixing device 4 comprises an upper pressing plate 41 and a lower pressing plate 42 which can be adjusted up and down relatively, and a gap 43 for clamping the mud mixing bag 1 is formed between the upper pressing plate 41 and the lower pressing plate 42; the upper pressing plate 41 and the lower pressing plate 42 can move relatively to rub the mud mixing bag 1. Specifically, the upper pressing plate 41 can be lifted and lowered through the lifting rod 45, and the height of the lower pressing plate 42 can be determined, so that the motor 44 can drive the lower pressing plate to rotate, and then the soil sample in the mud mixing bag 1 can be kneaded and mixed through rotary kneading after the mud mixing bag 1 is clamped by the upper pressing plate 41 and the lower pressing plate 42. By adopting the mechanical attached kneading, the problem of errors of the compaction degree of the soil sample caused by personal difference, manipulation difference and force difference is solved. The mud mixing device 4 can be rotated or translated and the like, and can fully knead the mud mixing bag 1.
The dry soil water mixing method is completed in a closed space, the soil sample and water in the mixing process are hermetically coated by the flexible mud mixing bag 1, the mixing and homogenizing process is carried out in a closed state, the time for exposing mud water in an air environment is short, the problem of errors caused by water evaporation and uncertainty of the water content of the soil sample is solved, and the influence of the temperature and the humidity of the environment in the mixing process is avoided.
Adopt the mixing mode of mixing the sealed cladding of mud bag 1, can be with between the less space range of soil and water restriction, through the mode of kneading, can make mud, water intensive mixing to mix mud bag 1 in the mixing process and can produce the elastic extrusion to the mixture of inside, further to the promotion of mud, water mixing effect.
The embodiment discloses a clay liquid-plastic limit joint measurement method, which comprises the following steps:
1) preparing a soil sample to be detected: preparing a plurality of soil samples to be detected with different water contents by adopting the soil sample preparation method with standard water content in the embodiment, wherein the water contents of the soil samples are within the range of plastic limit and liquid limit;
2) filling a soil sample to be tested: extruding the soil sample to be measured from the mud bag 1, and directly placing the soil sample in a soil containing cup for measurement to obtain a soil sample; the soil sample filled in the soil containing cup slightly protrudes out of the plane of the upper end opening of the soil containing cup, so that redundant soil is removed, and the upper surface of the soil containing cup is scraped.
After filling, placing a soil sample on a vibrator, and compacting the soil sample; the vibrator is coupled to a microcomputer of the control unit 6, and the microcomputer controls the strength and time of the vibrator, so that the consistency of the soil sample can be further controlled, and the accuracy of test measurement can be improved.
3) And (3) testing a soil sample: the soil sample is measured by adopting a liquid-plastic limit combined measuring instrument 5, a soil containing cup is placed on a boss of a detector, the central area of a cup opening faces to the conical tip of a conical drop hammer, after the height of the boss is roughly adjusted manually, a boss micro automatic lifting start button is pressed, after a system detects that the conical tip is contacted with the surface of the soil sample, the boss is stopped to lift, and the system automatically memorizes the axial initial position of the drop hammer.
Pressing down a drop hammer release button, automatically recording the penetration (d) of the current soil sample with the water content (w) by a microcomputer system of the control unit 6, and generating a first point of a (w-d) line by a display screen; repeatedly measuring the data of the mud sample (w-d) points with different water contents until drawing a (w-d) graph of the clay, and finishing a liquid-plastic limit combined measurement test; the microcomputer system of the control unit 6 can also be connected with a network, so that the detection data can be uploaded, and the information can be conveniently checked and transmitted.
In the clay liquid-plastic limit combined measurement, the soil sample only needs to be dried at the previous stage, the water content of the soil sample can be directly and accurately controlled in the soil sample preparation process, and the distinguishing effect on the water content of different point positions is good; and after the cone falling test, the step of secondary drying is not needed, the manufacturing period of the patterns with different water contents is short, the two-dimensional point coordinates of the w-d graph can be rapidly obtained in the detection process of the sinking depth of the cone every time, real-time data can be provided for timely judging the reliability of the test result, and the working efficiency is greatly improved.
The embodiment discloses a clay liquid-plastic limit joint measurement system, as shown in fig. 1 and 2, which is suitable for the clay liquid-plastic limit joint measurement method in the above embodiments, and includes a mud mixing bag 1, a sealing device, a metering device 3, a mud mixing device 4 and a liquid-plastic limit joint measurement instrument 5;
wherein, mix mud bag 1 for the sacculus that has opening 2, it is similar to the balloon form, can adopt the rubber materials support that has flexibility, has good elasticity and flexibility, can hold mud, water mixture to can knead after sealing, carry out the homogeneous mixing to soil sample.
The sealing device can adopt hot-pressing sealing equipment, can seal the opening 2 of the mud mixing bag 1, and forms a closed space for the mud mixing bag 1.
The metering device 3 comprises an electronic scale 31 for weighing the total weight of the mud mixing bag 1, so that the total weight of the mud mixing bag 1 in the filling process is detected to measure and calculate the water content of the soil sample; the metering device 3 may further comprise a liquid pump 32, the liquid pump 32 being capable of injecting water into the mud mixing bag 1 through a line.
The mud mixing device 4 can be used for kneading and mixing mud for the mud mixing bag 1 and comprises an upper pressing plate 41 and a lower pressing plate 42 which can be relatively adjusted up and down, and a gap 43 for clamping the mud mixing bag 1 is formed between the upper pressing plate 41 and the lower pressing plate 42; the upper pressing plate 41 and the lower pressing plate 42 can move relatively to rub the mud mixing bag 1. Specifically, the upper pressing plate 41 can be lifted and lowered through the lifting rod 45, and the height of the lower pressing plate 42 can be determined, so that the motor 44 can drive the lower pressing plate to rotate, and then the soil sample in the mud mixing bag 1 can be kneaded and mixed through rotary kneading after the mud mixing bag 1 is clamped by the upper pressing plate 41 and the lower pressing plate 42. By adopting the mechanical attached kneading, the problem of errors of the compaction degree of the soil sample caused by personal difference, manipulation difference and force difference is solved.
The liquid-plastic limit joint determinator 5 can determine a soil sample and determine the data of w-d points of the soil sample at the determination position; the control unit 6 can be used for coupling control of all devices, a microcomputer system of the control unit 6 is coupled with the liquid pump 32, and quantitative water injection of the liquid pump 32 can be controlled, so that the proportion of mud and water in the mud and water preparation process is proportioned; and the data of the w-d points of each soil sample measured by the liquid plastic limit combined measuring instrument 5 can be recorded, and the w-d graph of the soil sample can be automatically drawn according to each group of data.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A method for preparing a soil sample with standard water content is characterized by comprising the following steps:
s1 early dry soil preparation: drying a soil sample to be detected to obtain a dry soil sample, placing the dry soil sample in a closed container, crushing and sieving to obtain dry soil, and storing the obtained dry soil in a sealed moisture-proof container;
s2 quantitative water adding of the soil sample: filling a dry soil sample into a flexible mud mixing bag, and injecting a proper amount of water into the mud mixing bag according to the filling quality of the dry soil sample and the water content of the soil sample required to be prepared; sealing the opening of the mud mixing bag to obtain a closed mud mixing bag;
s3 soil sample muddy water homogenization: and kneading the mud mixing bag, and uniformly mixing the mud and the water in the mud mixing bag to obtain the soil sample with the required water content to be measured.
2. The method according to claim 1, wherein in the step of drying the soil sample to be tested in step S1, the collected soil is first divided into small pieces and placed in a drying device for preliminary drying; before the soil sample is completely dehydrated and hardened, taking out the soil sample, reducing the temperature, crushing, and then placing the soil sample in drying equipment to be continuously dried until the soil sample is completely dehydrated to obtain dry soil; in the crushing and sieving process, the dry soil sample is sieved by a sieve with the aperture of 0.5 mm.
3. The method of claim 1, wherein the mud mixing bag has a flexible bag-like structure with at least one opening; in the process of sealing the opening of the mud mixing bag, redundant gas in the mud mixing bag is discharged, and then the opening is sealed by adopting a sealing device.
4. The method for preparing a soil sample with standard water content according to claim 1, wherein in the step of filling the dry soil sample in the step S2, the mud mixing bag is placed on an electronic scale for weighing, and the water adding amount is quantified according to the weight and the water content of the dry soil sample weighed by the electronic scale.
5. The method for preparing a soil sample with standard water content according to claim 1, wherein in step S3, the mud mixing bag is kneaded by a mud mixing device, the mud mixing device comprises an upper pressing plate and a lower pressing plate which can be adjusted up and down relatively, and a gap for clamping the mud mixing bag is formed between the upper pressing plate and the lower pressing plate; the upper pressing plate and the lower pressing plate can move relatively to rub the mud mixing bag.
6. The method of claim 1, wherein in step S3, the mud mixing bag is kneaded by a mud mixing device, the mud mixing bag is taken out from the kneading gap, and the mud and water are beaten in a beating barrel to mix the mud and water.
7. A clay liquid-plastic limit joint determination method is characterized by comprising the following steps:
1) preparing a soil sample to be detected: preparing a plurality of soil samples to be tested with different water contents by adopting the soil sample preparation method with standard water content according to claims 1-6, wherein the water contents of the soil samples are within the range of the plastic limit and the liquid limit;
2) filling a soil sample to be tested: extruding the soil sample to be measured from the mud mixing bag, and directly placing the soil sample in a soil containing cup for measurement to obtain a soil sample;
3) and (3) testing a soil sample: and (4) determining the soil sample by adopting a liquid-plastic limit combined determination instrument to obtain w-d data of the soil sample with different water contents, and drawing a w-d graph of the clay.
8. The clay liquid-plastic limit joint measurement method according to claim 7, wherein in the step 2), the soil sample filled in the soil containing cup slightly protrudes above the upper end opening plane of the soil containing cup, and after the filling is completed, the soil sample is placed on a vibrator to compact the soil sample; removing the redundant soil, and scraping the upper surface of the soil containing cup.
9. The utility model provides a limit combined determination system is moulded to clay liquid which characterized in that includes:
the mud mixing bag is of a flexible bag-shaped structure for containing mud and water, and is provided with an opening;
the sealing device is used for sealing the opening of the mud mixing bag;
the metering device comprises an electronic scale for weighing the total weight of the mud mixing bag;
the mud mixing device is used for kneading and mixing mud for the mud mixing bag and comprises an upper pressing plate and a lower pressing plate which can be relatively adjusted up and down, and a gap for clamping the mud mixing bag is formed between the upper pressing plate and the lower pressing plate; the upper pressing plate and the lower pressing plate can move relatively to rub the mud mixing bag;
and the liquid-plastic limit combined determinator is used for detecting the w-d point data of the soil sample.
10. The system for jointly measuring the liquid-plastic limit of clay according to claim 9, wherein the metering device further comprises a liquid pump, the liquid pump is used for injecting water into the mud mixing bag through a pipeline, and controlling the water injection amount according to the dry soil quality and the water content; the device also comprises a control unit which is used for drawing a w-d graph of the soil sample according to the w-d point data of each soil sample.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2809988C1 (en) * | 2023-05-19 | 2023-12-20 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Method for determining plasticity of clay-based raw materials |
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2022
- 2022-04-21 CN CN202210420386.6A patent/CN114858548A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2809988C1 (en) * | 2023-05-19 | 2023-12-20 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Method for determining plasticity of clay-based raw materials |
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