CN206930667U - A kind of multi-parameter frozen soil on-site rapid detection device - Google Patents
A kind of multi-parameter frozen soil on-site rapid detection device Download PDFInfo
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- CN206930667U CN206930667U CN201720773112.XU CN201720773112U CN206930667U CN 206930667 U CN206930667 U CN 206930667U CN 201720773112 U CN201720773112 U CN 201720773112U CN 206930667 U CN206930667 U CN 206930667U
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Abstract
A kind of multi-parameter frozen soil on-site rapid detection device is the utility model is related to, the device includes base and line slideway and metal cone.The top of line slideway is provided with built-in pressure reading instrument, resistance readings instrument, the data acquisition of temperature reading instrument and display system container；The middle part of line slideway is provided with probe bracket, and its surface is provided with shift scale, and the shift scale is provided with the displacement pointer that end is fixed on probe bracket；The bottom of probe bracket is connected with conical metal by pressure sensor and popped one's head in, and the tip position in conical metal probe is provided with temperature sensor；Covered with insulating materials on temperature sensor；Probe bracket is provided with the pressure rod with pressurized handgrip；Pressure reading instrument is connected with pressure sensor；Resistance readings instrument is connected with metal cone and conical metal probe respectively；Temperature reading instrument is connected with temperature sensor.The utility model passes through to being measured while soil sample resistance, temperature and intensity, it is ensured that to the accuracy of detection of freezing soil situation.
Description
Technical field
It the utility model is related to frozen soil detection field, more particularly to a kind of multi-parameter frozen soil on-site rapid detection device.
Background technology
Frozen soil refers to that temperature is equal to or less than 0 DEG C, and the rock containing ice, the soil body.In China, the distribution of frozen soil is very wide
General, wherein Permafrost Area accounts for 22% or so of China's area, and North of Yangtze River major part region is Frozen Area,
Almost all of region is all permafrost region in short-term in addition to Hainan.So widely distributed permafrost region causes the substantial amounts of engineering in China to be built
If, rural activity all inevitably run into frozen soil.The influence of frozen soil can be ignored in wherein most activities, but part is special
Different engineering（Such as dam construction）Or rural activity then must take into consideration the influence of frozen soil, huge bad shadow otherwise may be caused
Ring.
Although the cyopedology in China has been achieved for certain achievement, whether the soil body is freezed and freezed power and sentence
For correlation research institution or specific region in personnel be not it is relatively simple, can not be complete by any instrument and equipment
Into.However, for the seldom engineering of contact frozen soil and agriculture personnel, the differentiation difficulty of frozen soil is still larger.Although can be with
Determine whether the soil body freezes by sampling progress laboratory test or asking professional person to carry out mirror method for distinguishing, but this method is for logical
It is unpractical for normal activity, it is therefore desirable to a kind of dress for the field quick detection that can be realized frozen soil block and whether freeze
Put.Yu Qihao etc.（Yu Qihao, Zhang Haining, Wang Junfeng, Guo Lei, Ma Lishan, thank to gorgeous, permafrost region backfill freezing strength scene
Device for fast detecting：China, 201510227373.7 [P] 2015.10.28）Propose a kind of quick progress frozen soil bulk strength
The device of differentiation, but the device is only that the intensity for carrying out soil block differentiates, but can not judge whether soil block freezes.
In the method for discrimination whether current existing soil body freezes, using the side of thermal infrared, thermoelectricity occasionally thermistor
The method of method measurement soil temperature is more conventional.However, the difference of salinity or pressure can change its solidification point in the soil body, because
This, differentiation of the thermometry to freezing soil situation is not especially accurate, especially more sensitive to freezing soil situation work
Defect is obvious in journey.Conventional research finds that its intensity and dielectric constant can significantly change after freezing soil, however, native
The difference of these single physical property of body can be used it for equal during the differentiation whether soil body freezes with affected by various factors
The larger deficiency of error be present.Therefore, existing instrument and equipment can not meet needs in the activity such as Practical Project, agricultural at present
Carry out the whether live equipment judged of freezing soil.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of same to soil sample temperature, resistance and three parameters of intensity
When the multi-parameter frozen soil on-site rapid detection device that gathers.
To solve the above problems, a kind of multi-parameter frozen soil on-site rapid detection device described in the utility model, its feature
It is：The device includes base and is located at the line slideway of the base side and is located at the metal cone of the base center；
The top of the line slideway is provided with built-in pressure reading instrument, resistance readings instrument, the data acquisition of temperature reading instrument and display system
System container；The middle part of the line slideway is provided with probe bracket, and its surface is provided with shift scale, and the shift scale is provided with end
The displacement pointer being fixed on the probe bracket；The bottom of the probe bracket is connected with conical metal by pressure sensor
Pop one's head in, the tip position in conical metal probe is provided with temperature sensor；Covered with insulation material on the temperature sensor
Material；The probe bracket is provided with the pressure rod with pressurized handgrip；The pressure reading instrument is connected with the pressure sensor；Institute
Resistance readings instrument is stated respectively with the metal cone and conical metal probe to be connected；The temperature reading instrument and the temperature
Degree sensor is connected.
The data acquisition and display system container and the probe bracket are each parallel to the base.
The tip of the metal cone and the cone of conical metal probe are on same straight line, and relative cloth
If.
The temperature sensor be temperature measurement accuracy higher than ± 0.5 DEG C, thermometric susceptibility higher than ± 0.1 DEG C thermistor or
Thermocouple.
The dynamometry precision of the pressure sensor is 1N.
The pressure reading instrument and the pressure sensor, the resistance readings instrument and the metal cone and the circular cone
Shape metal probe, the temperature reading instrument are connected with the temperature sensor by data line.
Principle of the present utility model is：The change of a variety of physics, mechanical property can occur after freezing soil, such as temperature
Reduce, the significantly rise of soil strength and resistivity, therefore, can be by measuring the change of the soil body these physics, mechanical property
To judge whether the soil body freezes.It is occasionally hot using thermal infrared, thermoelectricity in the method for discrimination whether current existing soil body freezes
The method of the method measurement soil temperature of quick resistance is more conventional, and temperature is generally less than 0 DEG C as freezing soil by this method
Criterion.However, the change of soil body salinity or pressure can cause the reduction of its solidification point, freezing soil temperature is not at the construction field (site)
In the case of knowing, judgement of the thermometry to freezing soil situation there may be certain error, dry frozen ground may be mistaken for into frozen soil.
After soil sample is freezed, its mechanical strength will be greatly improved, and the judgement of freezing soil situation can be carried out using the property.It is however, native
The change of body compactness, lithology material can cause the significantly change of soil sample mechanical strength, the height that this method will may not freezed
Compactness soil or roach are mistaken for frozen soil, and therefore, what the simple mechanical strength for testing the soil body can not also judge the soil body freezes shape
Condition.Similarly, if being detected using the resistance of the measurement soil body, frozen Saline Soils may be mistaken for melting soil.Therefore,
, can not be according to the obtained list of measurement although more significant change can occur for soil body physics, mechanical property after freezing soil
Individual behavior of mechanics judges whether the soil body freezes, and accurate in order to ensure frozen soil Site Detection result, it is necessary to use join more
Several methods.This method is joined by three temperature of soil sample, intensity and resistance parameters measure simultaneously by three above
Several Comprehensive Comparisons, determine soil sample freezes situation：Using soil sample temperature as primary distinguishing rule, when soil sample temperature is higher than
Soil sample is to melt soil at 0 DEG C；When soil sample temperature is less than 0 DEG C, because soil sample may not freezed due to the reduction of solidification point, i.e.,
Soil sample may be dry frozen ground, it is therefore desirable to carry out subsidiary discriminant using other specification, can sentence when soil strength is higher, resistance is larger
It is set to frozen soil.
The utility model has advantages below compared with prior art：
1st, the utility model has filled up the blank that field quick detection instrument and equipment is carried out to freezing soil situation, is non-special
The engineering staff of industry provides a kind of method of discrimination and equipment of simple, reliable freezing soil situation, so as to be greatly reduced
During geotechnical engineering construction in terms of the frozen soil differentiation expense caused by caused consulting and claim for eot.
2nd, the utility model is innovatively realized to being measured while three soil sample temperature, resistance and intensity indexs, can
The existing situation that dry frozen ground is mistaken for frozen soil during effectively avoiding only with temperature method differentiating at present, while can also imitate and keep away
Elapsed time is longer when exempting to test three parameters of soil sample respectively, causes soil moisture to be made in extraneous diabatic process and probe pressure
Migrated with lower to probe point position, and showing for conflict between different Testing index result of determination caused by diabatic process be present
As, it is ensured that to the accuracy of detection of freezing soil situation.
3rd, it is to survey at the construction field (site) because the measure of frozen soil strength needs the high precision instrument of specialty to carry out indoors
Amount.Standard penetration test (SPT) principle during the utility model innovatively tests soil in-situ is applied to frozen soil quick detection
Instrument research and development in, so as to realize less soil sample mechanical strength is differentiated at the construction field (site), for freezing soil situation differentiate
The purpose of important evidence is provided.
Brief description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is front view of the present utility model.
Fig. 2 is side view of the present utility model.
Fig. 3 is conical metal probe enlarged drawing in the utility model.
In figure：1- bases；2- metal cones；3- line slideways；4- data acquisitions and display system container；5- pressure readings
Instrument；6- resistance readings instrument；7- temperature reading instrument；8- shift scales；9- pressurized handgrips；10- pressure rods；11- probe brackets；12-
Displacement pointer；13- pressure sensors；14- conical metals are popped one's head in；15- insulating materials；16- temperature sensors；17- data pass
Defeated line.
Embodiment
As shown in Fig. 1 ~ 3, a kind of multi-parameter frozen soil on-site rapid detection device, the device includes base 1 and is located at base 1
The line slideway 3 of side and the metal cone 2 for being located at the center of base 1.
The top of line slideway 3 is provided with built-in pressure reading instrument 5, the data acquisition of resistance readings instrument 6, temperature reading instrument 7
And display system container 4；The middle part of line slideway 3 is provided with probe bracket 11, and its surface is provided with shift scale 8, the shift scale 8
It is provided with the displacement pointer 12 that end is fixed on probe bracket 11；The bottom of probe bracket 11 is connected with by pressure sensor 13
Conical metal probe 14, the conical metal probe 14 in tip position be provided with temperature sensor 16；Temperature sensor 16
On covered with insulating materials 15；Probe bracket 11 is provided with the pressure rod 10 with pressurized handgrip 9；Pressure reading instrument 5 passes with pressure
Sensor 13 is connected；Resistance readings instrument 6 is connected with metal cone 2 and conical metal probe 14 respectively；Temperature reading instrument 7 and temperature
Sensor 16 is connected.
Wherein：Data acquisition and display system container 4 and probe bracket 11 are each parallel to base 1.
The tip of metal cone 2 and the cone of conical metal probe 14 are on same straight line, and relative laying, are formed
Electric resistance sensor.
Temperature sensor 16 is temperature measurement accuracy higher than the thermistor or heat of ± 0.5 DEG C, thermometric susceptibility higher than ± 0.1 DEG C
Galvanic couple.
The dynamometry precision of pressure sensor is 1N.
Pressure reading instrument 5 and pressure sensor, resistance readings instrument 6 and metal cone 2 and conical metal probe 14, temperature
Readout instrument 7 is connected with temperature sensor 16 by data line 17.
The detection method of the multi-parameter frozen soil on-site rapid detection device, comprises the following steps：
(1) typical cylindrical soil sample is made；
(2) the column soil sample is placed on base 1, and by metal cone 2（That is lower resistance sensor）Insert column soil
Sample bottom center, it is allowed to contact closely with column soil sample；
(3) the conical metal probe 14 of temperature sensor 16 will be built-in with（That is top electric resistance sensor）With column soil sample
End face center is contacted, and the resistance of the column soil sample is read using resistance readings instrument 6；
(4) pressurizeed by pressurized handgrip 9, pressure sensor 13 and conical metal is popped one's head in 14 to 0.1 ~ 2 li of bottom offset
Rice；
(5) the pressure extreme value and average value during pushing are read using pressure reading instrument 5；
(6) conical metal probe 14 is placed in column soil sample 1 ~ 5 minute, read after the stable reading of temperature reading instrument 7
Soil sample temperature value；
(7) soil sample resistance, pressure and the temperature value that record detection obtains, judge whether the soil body freezes：
If soil temperature>0 DEG C, then the soil body does not freeze, stops detection；
If soil temperature≤0 DEG C, and soil strength≤critical intensity Sc, then the soil body does not freeze, may be dry frozen ground, stops inspection
Survey；
If soil temperature≤0 DEG C, and soil strength>Critical intensity Sc, soil body resistance≤critical resistance Rc, then the soil body do not freeze
Knot, it may be supercooling gravelly soil, stop detection；
If soil temperature≤0 DEG C, and soil strength>Critical intensity Sc, soil body resistance>Critical resistance Rc, then the soil body freeze
Knot.
Its freezing strength is determined according to table 1.
The soil sample freezing strength of table 1 differentiates system
Note：Critical-temperature needs to be corrected according to actual soil property situation with intensity level.
Embodiment 1
In order to verify practicality of the present utility model, it is prepared for melting soil sample in laboratory, and according to embodiment
Described in operating procedure tested.
Result of the test finds that the soil sample resistance is 50 Ω or so, and maximum intensity 64N, temperature is 11.6 DEG C.According to table 1,
The soil sample is to melt soil.Test result shows that soil sample intensity is very low, and the process of pushing causes the destruction of soil sample.
Embodiment 2
In order to verify practicality of the present utility model, frozen soil sample is prepared in laboratory, and according to embodiment
Described in operating procedure tested.
Result of the test finds that the soil sample resistance is 5.59M Ω or so, and maximum intensity 405N, temperature is -9.3 DEG C.According to
Table 1, the soil sample are frozen soil, and the soil sample is strong Frozen Soil.Soil sample is complete after test result display experiment, and do not ftracture sign, table
Bright soil sample intensity is higher, consistent with testing result.
Comparative example 1 and embodiment 2, it can be seen that the utility model can not only accurately identify whether the soil body freezes,
The freezing strength situation of the soil body can also be tested, there is higher use value.
Claims (6)
- A kind of 1. multi-parameter frozen soil on-site rapid detection device, it is characterised in that：The device includes base（1）Be located at the bottom Seat（1）The line slideway of side（3）And it is located at the base（1）The metal cone at center（2）；The line slideway（3）It is upper Portion is provided with built-in pressure reading instrument（5）, resistance readings instrument（6）, temperature reading instrument（7）Data acquisition and display system container （4）；The line slideway（3）Middle part be provided with probe bracket（11）, its surface is provided with shift scale（8）, the shift scale（8） The probe bracket is fixed on provided with end（11）On displacement pointer（12）；The probe bracket（11）Bottom pass through pressure Force snesor（13）It is connected with conical metal probe（14）, conical metal probe（14）Interior tip position passes provided with temperature Sensor（16）；The temperature sensor（16）On covered with insulating materials（15）；The probe bracket（11）It is provided with band pressurization Handle（9）Pressure rod（10）；The pressure reading instrument（5）With the pressure sensor（13）It is connected；The resistance readings instrument （6）Respectively with the metal cone（2）Popped one's head in the conical metal（14）It is connected；The temperature reading instrument（7）With it is described Temperature sensor（16）It is connected.
- A kind of 2. multi-parameter frozen soil on-site rapid detection device as claimed in claim 1, it is characterised in that：The data acquisition And display system container（4）With the probe bracket（11）Each parallel to the base（1）.
- A kind of 3. multi-parameter frozen soil on-site rapid detection device as claimed in claim 1, it is characterised in that：The metal cone （2）Tip and the conical metal pop one's head in（14）Cone be on same straight line, and relative lay.
- A kind of 4. multi-parameter frozen soil on-site rapid detection device as claimed in claim 1, it is characterised in that：The TEMP Device（16）It is that temperature measurement accuracy is higher than ± 0.5 DEG C, thermistor or thermocouple of the thermometric susceptibility higher than ± 0.1 DEG C.
- A kind of 5. multi-parameter frozen soil on-site rapid detection device as claimed in claim 1, it is characterised in that：The pressure passes The dynamometry precision of sensor is 1N.
- A kind of 6. multi-parameter frozen soil on-site rapid detection device as claimed in claim 1, it is characterised in that：The pressure reading Instrument（5）With the pressure sensor（13）, the resistance readings instrument（6）With the metal cone（2）With the conical metal Probe（14）, the temperature reading instrument（7）With the temperature sensor（16）Pass through data line（17）It is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720773112.XU CN206930667U (en) | 2017-06-29 | 2017-06-29 | A kind of multi-parameter frozen soil on-site rapid detection device |
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| CN201720773112.XU CN206930667U (en) | 2017-06-29 | 2017-06-29 | A kind of multi-parameter frozen soil on-site rapid detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362399A (en) * | 2018-05-02 | 2018-08-03 | 吉林大学 | A kind of cable for measuring temperature |
| CN109212159A (en) * | 2017-06-29 | 2019-01-15 | 中国科学院寒区旱区环境与工程研究所 | A kind of multi-parameter frozen soil on-site rapid detection device and its detection method |
-
2017
- 2017-06-29 CN CN201720773112.XU patent/CN206930667U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212159A (en) * | 2017-06-29 | 2019-01-15 | 中国科学院寒区旱区环境与工程研究所 | A kind of multi-parameter frozen soil on-site rapid detection device and its detection method |
| CN109212159B (en) * | 2017-06-29 | 2024-02-23 | 中国科学院西北生态环境资源研究院 | Multi-parameter frozen soil on-site rapid detection device and detection method thereof |
| CN108362399A (en) * | 2018-05-02 | 2018-08-03 | 吉林大学 | A kind of cable for measuring temperature |
| CN108362399B (en) * | 2018-05-02 | 2024-04-26 | 吉林大学 | Temperature measurement cable |
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Effective date of registration: 20200806 Address after: 730000 No.318, Donggang West Road, Chengguan District, Lanzhou City, Gansu Province Patentee after: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS Address before: Chengguan District of Gansu city of Lanzhou province Donggang West Road 730000 No. 320 Patentee before: Institute of environment and Engineering in cold and dry areas, Chinese Academy of Sciences |