CN110398442A - A kind of experimental rig for testing bubble surface tension in gassiness soil sample - Google Patents
A kind of experimental rig for testing bubble surface tension in gassiness soil sample Download PDFInfo
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- CN110398442A CN110398442A CN201910851279.7A CN201910851279A CN110398442A CN 110398442 A CN110398442 A CN 110398442A CN 201910851279 A CN201910851279 A CN 201910851279A CN 110398442 A CN110398442 A CN 110398442A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
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Abstract
The present invention discloses a kind of experimental rig for testing bubble surface tension in gassiness soil sample, including loading frame, external pressure room, interior pressure chamber, computer system and survey body change system, gassiness soil sample is placed in interior pressure chamber, interior pressure chamber is placed in closed external pressure room, external pressure room is placed on loading frame, and the vertical loading axis on loading frame sequentially passes through and applies load to gassiness soil sample behind external pressure room and interior pressure chamber；P is installed using upper and lower two different permeable stones and in the middle section of sampleTDGTwo methods of probe obtain gassiness soil inner pore gas pressure information.The experimental rig of bubble surface tension in test gassiness soil sample of the invention, gassiness air in soil can not be quantified by, which solving the problems, such as, steeps the surface tension generated to soil particle, it borrows the device for measuring in unsaturated soil and totally becoming in the present invention to become to measure the body of gassiness soil, to obtain the information of the pore gas pressure of gassiness sample.
Description
Technical field
The present invention relates to soil sample test and experiment device technical fields, more particularly to bubble table in a kind of test gassiness soil sample
The experimental rig of face tension.
Background technique
Methane in shallow stratum brings many stubborn problems to the development and utilization of underground and ocean space.Shallow gas it is main come
Source first is that the organic matter in muddy soft soil decomposes under the action of microorganism, ferments, generate the biogas based on methane.
Biogas in weak soil hole, makes level of ground water weak soil below be in unsaturated state, at this time with discrete bubble formal distribution
Saturation degree it is relatively high (it is generally acknowledged that Sr > 85%).Because the mechanical property that is showed of gassiness soil be different from saturated soil and
Traditional unsaturated soil, in the 1980s, being defined as " gassiness soil ".Currently, domestic and foreign scholars have opened for gassiness soil
A large amount of experimental study has been opened up, it will be appreciated, however, that the pore air pressure measured in free bubble is very difficult, and
Pore air pressure is a variable, is changed with the generation of bubble, expansion/contraction of volume, the mechanical property of gassiness soil will
It changes a lot.So far, it tests and the research of theoretical side commonly assumes that pore air pressure (ug) it is equal to pore water pressure
(uw), have ignored the surface tension (u of bubble generationg-uw) influence to soil particle skeleton, directly adopt principle of effective stress solution
Release test result.But it is this hypothesis be it is incorrect, otherwise bubble is not likely to form.These assume to test result explanation,
The foundation and numerical analysis of constitutive model all bring very big uncertainty.Therefore, the pore air pressure in gassiness soil is obtained
Information it is most important to compression, the intensity and modulus property etc. of analysis gassiness soil.
Triaxial apparatus is measurement deformation and the common instrument of intensity.The three-axis mounting in soil test is divided into saturation three at present
Axis instrument and unsaturation triaxial apparatus.But for test gassiness soil all Shortcomings.In saturation triaxial apparatus, because the hole in soil is complete
Portion is filled with water, and in drainage test, the volume of the water of discharge or sucking is exactly the volume change of soil sample, is unable to measure gassiness soil
Body caused by middle bubble shrinkage/expansion etc. becomes；In disdrainage test, the pore pressure measured is pore water pressure.Therefore logical
Normal triaxial apparatus is only capable of measuring at the top of sample or the variation of the pore water pressure of bottom, is unable to measure the porous gases of the soil containing free gas
Pressure can not quantify the surface tension (difference of pore air pressure and water pressure) for acting on soil skeleton.
The unsaturation triaxial apparatus device situation that gas phase and water phase each communicate with suitable for sample, because gas phase is connection
, usually with whole translation method come the pore gas pressure in Control Assay, thus the matric suction (u in Control Assayg-uw), i.e.,
The difference of pore air pressure and pore water pressure between the two is kept in use process, to control the matric suction value of the soil body.
For unsaturated soil, because containing gas in soil, the volume of the water of the volume change and discharge of soil sample is unequal, most frequently adopts
It is that pressure chamber and differential pressure pick-up survey body change (Ng et al.2002) in HKUST.
Triaxial apparatus is measurement deformation and the common instrument of intensity.The three-axis mounting in soil test is divided into saturation three at present
Axis instrument and unsaturation triaxial apparatus.But for test gassiness soil all Shortcomings.For the soil body containing free bubble, bubble is random
It is distributed in the sample, therefore it is very difficult for measuring the pore air pressure in bubble, and pore air pressure is a change
Amount, pore air pressure can change with the contraction and expansion of bubble.These are to the explanation of gassiness soil test result, constitutive model
It establishes and numerical analysis all brings very big uncertainty.Therefore, the information of pore air pressure is obtained to analysis gassiness soil
Compression, intensity and modulus property etc. are most important.
Summary of the invention
The object of the present invention is to provide a kind of experimental rigs of bubble surface tension in test gassiness soil sample, and solving can not
Quantization gassiness air in soil steeps the problem of the surface tension generated to soil particle, and the overall change of measurement in unsaturated soil is borrowed in the present invention
Device come measure gassiness soil body become, to obtain the saturation degree of gassiness sample.
To achieve the above object, the present invention provides following schemes: the present invention provides bubble in a kind of test gassiness soil sample
The experimental rig of surface tension, including loading frame, external pressure room, interior pressure chamber, computer system and survey body become system, gassiness soil
Sample is placed in the interior pressure chamber, and the interior pressure chamber is placed in the closed external pressure room, and the external pressure room is placed
Vertical loading axis on the loading frame, and on the loading frame sequentially passes through behind the external pressure room and interior pressure chamber to institute
It states gassiness soil sample and applies load；Different permeable stones is arranged in two sides up and down in the interior pressure chamber in gassiness soil sample, and
The sensing probe for obtaining gassiness soil inner pore gas pressure information is provided in the pressure chamber Suo Nei.
Preferably, the external pressure room is cylindrical sleeve, and the upper surface of the cylindrical sleeve passes through long screw and bottom
Portion's support forms the closed container for placing the interior pressure chamber after being connected；There are one and gas in the upper surface of the cylindrical sleeve
Pressure controller is connected and hole to be opened/closed.
Preferably, displacement sensor is connected on the vertical loading axis, the probe of institute's displacement sensors is placed in described
Variation in external pressure room and for detecting soil sample height, institute's displacement sensors are linked with the computer system signal.
Preferably, it includes high-precision differential pressure pick-up that the survey body, which becomes system, and the interior pressure chamber is the bottle of upper end opening
Shape room, and the side for being located at the interior pressure ceiling portion is additionally provided with referring to pipe, it is described to be used respectively carefully referring to pipe with interior pressure chamber
Pipe is connect with two ports of high-precision differential pressure pick-up.
Preferably, the measurement gassiness soil sample inner hole pressure gas pressure systems include sensor for pore water pressure one, pore pressure sensing
Device two and sensing probe are located in the interior pressure chamber, are equipped with pottery clay plates below the gassiness soil sample, top is equipped with
Permeable stone, the top of the permeable stone are sample cap；The piping connection of the sensor for pore water pressure one and the pottery clay plates bottom, is used
In measurement gassiness soil sample pore water pressure；The sensor for pore water pressure two is connected in the sample cap, for measuring gassiness soil
Sample pore fluid pressure；The sensing probe is mounted on the middle part of the gassiness soil sample, for measuring in gassiness soil sample
The surface tension of bubble.
Preferably, it further includes back-pressure fixing fabric structure device that the survey body, which becomes system, and the back-pressure fixing fabric structure device is connected to institute
Gassiness soil sample top is stated, for controlling and measuring the back-pressure of the soil body.
Preferably, the sensing probe includes diffusion tip and pressure sensor, and the diffusion tip is by sensor jointing
It being formed with spiral silicone tube, the pressure sensor is fixedly connected with the sensor jointing and passes through O-shaped sealing ring and seals,
The end of the sensor connector connects the spiral silicone tube, and the spiral silicone tube is for carrying out gas exchanges.
Preferably, the junction of sensor jointing is provided with pressure sensitive film on the pressure sensor；It is described
Guard shield is provided on the outside of spiral silicone tube.
The present invention achieves following technical effect compared with the existing technology:
Become for discharge in pore water pressure and sample/sucking water body can only be measured in three axis of saturation, the present invention uses
Upper and lower two different permeable stones and P is installed in the middle section of sampleTDGTwo methods of probe obtain gassiness soil inner pore gas
Body pressure.The body that gassiness soil is measured using pressure chamber in HKUST and differential pressure pick-up is become.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the device of the invention detail drawing (wherein black overstriking dotted portion is the position to be amplified)；
Fig. 2 is black overstriking dotted portion enlarged drawing in Fig. 1；
Fig. 3: PTDGProbe designs detail drawing；
Wherein, 1 loading frame；2 external pressure rooms；21 long screws；22 holes；3 bottom support brackets；Pressure chamber in 4；41 referring to pipe；43
Tubule；44 high-precision differential pressure pick-ups；5PTDGProbe；61 vertical loading axis；62 sensor for pore water pressure one；63 sensor for pore water pressure two；
71 pottery clay plates；72 permeable stones；73 gassiness soil samples；74 sample caps；81 diffusion tips；82 pressure sensors；83 sensors connect
Head；84 spiral silicone tubes；85 pressure sensitive films；86O type sealing ring；87 guard shields；88 electric wires；9 back-pressure fixing fabric structure devices.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of experimental rigs of bubble surface tension in test gassiness soil sample, and solving can not
Quantization gassiness air in soil steeps the problem of the surface tension generated to soil particle, and the overall change of measurement in unsaturated soil is borrowed in the present invention
Device come measure gassiness soil body become, to obtain the information of the saturation degree of gassiness sample.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
As shown in Figure 1-3, the present invention provides a kind of experimental rig for testing bubble surface tension in gassiness soil sample, including add
Carrier 1, external pressure room 2, bottom support bracket 3, interior pressure chamber 4, reference pipe 41, tubule 43, high-precision differential pressure pick-up 44, sensing are visited
Head (PTDGProbe 5), it is vertical loading axis 61, sensor for pore water pressure 62, sensor for pore water pressure 63, high air-entry value pottery clay plates 71, common permeable
Stone 72, gassiness soil sample 73, sample cap 74, displacement sensor 8, back-pressure fixing fabric structure device 9.
PTDGFor Pressure of Total Dissolved Gas, general dissolved gas pressure；PTDGProbe is for detecting
The sensor of general dissolved gas pressure in gassiness soil sample.
Loading frame 1 is outermost supporting construction, is used to support whole device, and by bottom according to the speed of setting
Lifting is to apply axis pressure；External pressure room 2 is to be formed after triaxial apparatus cylindrical sleeve is connected by long screw 21 with bottom support bracket 3
Closed container；Cylindrical sleeve upper surface has one can open the hole 22 that can be closed to be connected with gas pressure regulator, beats when filling the water in container
Open pore exhaust, water filling, which finishes, closes stomatal limiting value sealing container, and applies air pressure by this hole 22, to control confining pressure；
Displacement sensor 8 is connected on vertical loading axis 61, and the probe of displacement sensor 8 is placed in external pressure room 2, can detecte soil sample height
The variation of degree, displacement sensor 8 connect computer system, can import data to computer and be analyzed；Bottom support bracket 3 is for branch
Support the other instruments of soil sample and experiment；Interior pressure chamber 4 is the ampuliform room of upper end opening, and interior pressure chamber 4 and external pressure room 2 are respectively arranged with
No more than the degassed water at the top of it.Interior pressure chamber 4 and referring to pipe 41 respectively with the two of tubule 43 and high-precision differential pressure pick-up 44
A port connection；Apply air pressure by the pipeline at 2 top of external pressure room to control confining pressure, it ensure that inside and outside interior pressure chamber 4 not
There are pressure difference and interior pressure chamber 4 will not deform.
When volume of sample variation, the water level of interior pressure chamber 4 will change, and remain unchanged referring to 41 water level of pipe, two
A small pressure difference is generated between person to obtain by 44 measure differences in pressure value of high-precision differential pressure pick-up finally by conversion
The overall of sample becomes；The pottery clay plates 71 of high air-entry value are mounted on the lower section of gassiness soil sample；Common permeable stone 72 installs the examination of gassiness soil
The top of sample 73；Sensor for pore water pressure 1 is connected to the pipeline of high 71 bottom of air-entry value pottery clay plates, for measuring gassiness soil sample
73 pore water pressures；Sensor for pore water pressure 2 63 is connected in sample cap 74, for measuring gassiness soil sample pore fluid pressure；PTDG
Probe 5 is mounted in the middle part of sample, for measuring total gas solubility in the gassiness soil body, to calculate the surface tension of bubble；Instead
Laminate plot controller 9 is connected to soil body top, for controlling and measuring soil body back-pressure.
PTDGProbe 5 is mainly made of the pressure sensor 82 for being connected to diffusion tip 81.Its device is shown in Fig. 3: passing including pressure
Sensor 82, sensor jointing 83, spiral silicone tube 84, pressure sensitive film 85, O-shaped sealing ring 86, guard shield 87, electric wire
88.Diffusion tip is made of sensor jointing 83 and spiral silicone tube 84.Silicone tube gas-permeable, but cannot be permeable.Solution gas
Body is spread by silica gel tube wall, is swapped between water and the gap of probe.Carry out gas exchanges on silicone tube wall, Zhi Daorong
Until reaching balance between solution gas and the gas for filling gap.It is fixed that the gas pressure popped one's head in gap when balance meets Henry
Rule.
In the present invention test gassiness soil sample in bubble surface tension experimental rig, using up and down it is two different permeable
Plate obtains gassiness soil inner pore gas pressure: sample bottom uses high air-entry value pottery clay plates 71 to make the hole in soil sample
Water phase isolation in gas and underlying pore water pressure force measuring system, in the saturated condition, high air-entry value pottery clay plates 71 are permitted
Xu Shui passes through.As long as matric suction (the u appliedg-uw) it is no more than the air-entry value of ceramic wafer, it can prevent free gas from passing through
And enter pore water pressure measuring system.What is measured it is hereby ensured that underlying pore water pressure force measuring system is hole
Water pressure uw；Sample top disposes common permeable stone 72, and air-entry value is very low, and the water in gassiness soil sample is gentle can be passed through, even
The pore fluid pressure of the sensor for pore water pressure measurement connect is a mixed number u about pore water pressure and pore air pressuref, table
Up to formula Uf=Uw+(1-Sr)×(Ug-Uw).Wherein SrFor the saturation degree of gassiness soil sample, can overall become of used measurement be calculated,
uwPore water pressure is measured for sample bottom, by simply calculating, surface produced by bubble inside sample can be quantified
Power.
P is installed in the middle section of sampleTDGProbe measurement general dissolved gas pressure, is produced to obtain in sample by bubble
Raw surface tension (ug-uw) value.According to Henry's law, general dissolved gas pressure is equal to mixed gas each component partial pressure
The sum of power.At a certain temperature, when gas dissolution reaches balance, point of the gas in the solubility and gas phase of gas in a liquid
It is pressed into direct ratio.Measured general dissolved gas pressure is pore water pressure uw, matric suction (ug-uw) and atmospheric pressure summation.It is logical
Cross the pore water pressure u obtained by sample bottomw, the surface tension (u that the bubble in sample generates can be calculatedg-uw) value.
The body that gassiness soil is measured using pressure chamber in HKUST and differential pressure pick-up is become.It is incorporated in Ng et al. (2002)
Overall the becoming of pressure chamber's measurement gassiness soil sample in the HKUST of invention, so as to obtain variation and the sample of bubble volume
Saturation degree.
Wherein: ug: pore gas pressure
uw: pore water pressure
uf: pore fluid pressure
ug-uw: the surface tension that matric suction or bubble generate.
Further, the place that the experimental rig in the present invention needs to pay attention to is as follows:
1. sample bottom uses high air-entry value pottery clay plates 71 to make the hole gas and underlying hole in soil sample
Water phase isolation in hydraulic pressure force measuring system, in the saturated condition, high air-entry value pottery clay plates 71 allow water to pass through.As long as being applied
Matric suction be no more than ceramic wafer air-entry value, can prevent free gas from passing through pore water pressure force measuring system.
To give full play to its effect, Reusability pressure is wanted before being tested to be saturated high air-entry value pottery clay plates 71；
2. sample top disposes common permeable stone 72, air-entry value is very low, and the water in gassiness soil sample is gentle can be passed through, even
It is one about pore water pressure and pore air pressure that the pressure sensor for pore water pressure measurement for the side of connecting, which is pore fluid pressure,
Mixed number uf, expression formula Uf=Uw+(1-Sr)×(Ug-Uw).Wherein SrFor the saturation degree of gassiness soil sample, can used measurement totality
Change is calculated, uwPore water pressure is measured for sample bottom, by simply calculating, the bubble that can be calculated in sample is generated
Surface tension (ug-uw) value；
3. making gassiness soil sample, gassiness soil sample is packaged into impermeable layer, and stay suitable P in advanceTDGThe hole of probe 5.By PTDG
Probe 5, which is inserted into sidewards in the soil body, to be divided, and blend compounds water will be because of PTDGProbe 5 is pasted on impermeable membrane, and is allowed close around impermeable layer
It seals waterproof.During experiment, PTDGThe general dissolved gas pressure for 5 measurable gassiness soil samples of popping one's head in, to obtain in sample
Matric suction (ug-uw) value.According to Henry's law, general dissolved gas pressure be equal to mixed gas each component gas partial pressure it
With.At a certain temperature, when gas dissolution reaches balance, the gas is divided into the solubility and gas phase of gas in a liquid
Direct ratio.Measured general dissolved gas pressure is pore water pressure uw, matric suction (ug-uw) and atmospheric pressure summation.By by
The pore water pressure u that sample bottom obtainsw, the matric suction in sample can be calculated；
4. sample is put on pedestal, binary channels gas pressure regulator is put on outside, connects 4 He of pressure chamber in HKUST
Differential pressure pick-up covers cylindrical sleeve outside binary channels gas pressure regulator, and long screw 21 is tightened, and forms a sealing and holds
Device；
5. measuring the overall of gassiness soil using pressure chamber 4 in HKUST and differential pressure pick-up to become.Pass through back-pressure pressure volume
The volume of the available water excluded in gassiness soil sample of controller, it is both what bubble generated that overall change, which subtracts the variation of the volume of water,
Body becomes, therefore the also variation of available gassiness soil sample saturation degree；
6. the present apparatus is other than available intensity and deformation behaviour because can quantify matric suction in gassiness soil and
Saturation degree, therefore the also available soil characteristics curve similar in unsaturated soil；
7. this device can obtain the information of the pore air pressure of gassiness soil sample and body becomes strong to the shearing of analysis gassiness soil
Degree, consolidation behavior and body become feature, soil characteristics curve of gassiness soil etc. and provide important foundation, can preferably explain test
As a result, the foundation and numerical analysis for constitutive model provide data support.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (8)
1. the experimental rig of bubble surface tension in a kind of test gassiness soil sample, it is characterised in that: including loading frame, external pressure
Room, interior pressure chamber, computer system and survey body become system, and gassiness soil sample is placed in the interior pressure chamber, the interior pressure chamber
It is placed in the closed external pressure room, the external pressure room is placed on the loading frame, and vertical on the loading frame
Loading axis applies load to the gassiness soil sample after sequentially passing through the external pressure room and interior pressure chamber；In the interior pressure chamber
Different permeable stones is set in the two sides up and down of gassiness soil sample, and is provided in the pressure chamber Suo Nei for obtaining gassiness soil inner hole
The sensing probe of gap gas pressure information.
2. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 1, it is characterised in that: described
External pressure room is cylindrical sleeve, and the upper surface of the cylindrical sleeve forms after being connected by long screw with bottom support bracket and is used for
Place the closed container of the interior pressure chamber；The upper surface of the cylindrical sleeve has one to be connected with gas pressure regulator and can be opened and closed
Hole.
3. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 1, it is characterised in that: described
Displacement sensor is connected on vertical loading axis, the probe of institute's displacement sensors is placed in the external pressure room and for detecting
The variation of soil sample height, institute's displacement sensors are linked with the computer system signal.
4. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 1, it is characterised in that: described
Surveying body to become system includes high-precision differential pressure pick-up, and the interior pressure chamber is the ampuliform room of upper end opening, and is located at the internal pressure
The side in power ceiling portion is additionally provided with referring to pipe, described to use tubule and high-precision differential pressure pick-up respectively with interior pressure chamber referring to pipe
Two ports connection.
5. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 1, it is characterised in that: described
Measuring gassiness soil sample inner hole pressure gas pressure systems includes sensor for pore water pressure one, sensor for pore water pressure two and sensing probe, is located at
In the interior pressure chamber, different permeable stones is respectively to be set to the pottery clay plates of the gassiness soil sample following above and and permeable
Stone, the top of the permeable stone are sample cap；The piping connection of the sensor for pore water pressure one and the pottery clay plates bottom, for surveying
Measure gassiness soil sample pore water pressure；The sensor for pore water pressure two is connected in the sample cap, for measuring gassiness soil sample
Pore fluid pressure；The sensing probe is mounted on the middle part of the gassiness soil sample.
6. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 5, it is characterised in that: described
Surveying body to become system further includes back-pressure fixing fabric structure device, and the back-pressure fixing fabric structure device is connected to gassiness soil sample top, uses
In the back-pressure for controlling and measuring the soil body.
7. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 5, it is characterised in that: described
Sensing probe includes diffusion tip and pressure sensor, and the diffusion tip is made of sensor jointing and spiral silicone tube, described
Pressure sensor is fixedly connected with the sensor jointing and passes through O-shaped sealing ring and seals, the sensor connector
End connects the spiral silicone tube, and the spiral silicone tube is for carrying out gas exchanges.
8. the experimental rig of bubble surface tension in test gassiness soil sample according to claim 7, it is characterised in that: described
Junction on pressure sensor with sensor jointing is provided with pressure sensitive film；It is provided on the outside of the spiral silicone tube
Guard shield.
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| CN201910851279.7A CN110398442A (en) | 2019-09-10 | 2019-09-10 | A kind of experimental rig for testing bubble surface tension in gassiness soil sample |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024923A (en) * | 2019-12-03 | 2020-04-17 | 中国电建集团华东勘测设计研究院有限公司 | Gas evolution in soil and gas-containing soil mechanics measuring device |
| CN112067481B (en) * | 2020-09-02 | 2023-11-21 | 内蒙古大学 | Intelligent geotechnical mechanical parameter testing system |
-
2019
- 2019-09-10 CN CN201910851279.7A patent/CN110398442A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024923A (en) * | 2019-12-03 | 2020-04-17 | 中国电建集团华东勘测设计研究院有限公司 | Gas evolution in soil and gas-containing soil mechanics measuring device |
| CN112067481B (en) * | 2020-09-02 | 2023-11-21 | 内蒙古大学 | Intelligent geotechnical mechanical parameter testing system |
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