CN102841369B - Environment piezocone penetration test probe used for detecting soil mass radioactive intensity in situ - Google Patents
Environment piezocone penetration test probe used for detecting soil mass radioactive intensity in situ Download PDFInfo
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- CN102841369B CN102841369B CN201210327013.0A CN201210327013A CN102841369B CN 102841369 B CN102841369 B CN 102841369B CN 201210327013 A CN201210327013 A CN 201210327013A CN 102841369 B CN102841369 B CN 102841369B
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- scintillation crystal
- friction cylinder
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Abstract
The invention discloses an environment piezocone penetration test probe used for detecting soil mass radioactive intensity in situ. The top end of the probe is connected with an analog-digital converter (2) by using a coaxial cable (1) so as to transmit signals and data; the analog-digital converter (2), a two-dimensional clinometer (3) and a pre-posed amplifier (4) are connected to the upper half part of the probe in sequence from top to bottom; a side wall friction cylinder (5) is arranged on the lower half part of the probe; a pair of lead shields (6), a photomultiplier (7), a NaI (TI) scintillation crystal (8) and an aperture water pressure sensor (10) are arranged in the side wall friction cylinder (5); the probe side wall corresponding to the NaI (TI) scintillation crystal (8) is provided with a stainless steel thin wall (9); and a piezocone filter ring (11) and a cone probe (12) are connected below the side wall friction cylinder (5). The probe disclosed by the invention has the following characteristics of safety, in-situ detection, convenience, high speed, accuracy, economy, and the like, so that a fast and powerful detection tool is provided for the rock soil mass radioactive intensity evaluation.
Description
Technical field
The present invention relates to a kind of environmental probe in situ detection soil body radioactive intensity, belong to a kind of static sounding device that can detect underground soil body radioactive intensity directly, fast in Geotechnical Engineering and field of environment engineering.
Background technology
Along with the fast development of economy, the quickening of urbanization and process of industrialization, Site Soil pollutes more and more serious, and the ground ring border that we depend on for existence goes from bad to worse, and environmental geotechnical engineering problems has become China's Geotechnical Engineering and the important research topic of environmental engineering worker.Can pollute the underground soil body and underground water containing active sediment or nuke rubbish etc., directly or indirectly serious threat be caused to health and environment.When radiomaterial exists, be one of Geotechnical Engineering and the requisite content of environmental engineering site investigation to alpha-contamination kind and strength assessment.Existing Radio valuation method combines drill hole sampling and shop experiment usually, and installs observation of groundwater levels well.But sampling on the one hand produces agitation error, sample can produce radiological hazard with the contact of human body on the other hand, also relates to simultaneously and gathering and the shortcoming such as experimentation cost is too high, analytical cycle is long.
Static sounding technology refers to and utilizes pressure apparatus by the sounding rod indentation test soil layer with contact probe, and the static point resistance, side friction power etc. of throughput examining system test soil, can determine some basic physical mechanics properties of soil.The static sounding technology history of existing more than 80 year so far.Widespread use static sounding in the world, partly or entirely instead of the probing in engineering investigation and sampling.In recent years along with the fast development of sensor technology, occurred a lot of new static sounding technology, these technology can obtain pollutant proterties, temperature, even image quickly and accurately.It is widely used in environmental geotechnical field abroad.China is more late in the research starting of novel static sounding sensor, and the penetration resistance that current domestic widely used single Double lumen intubation only can be tested or specific penetration resistance, side friction power, confirmable soil layer basic physical mechanics properties is very limited.
When radiation source is on scintillation crystal, scintillation crystal excitation photon and produce fluorescence phenomenon, can by light signal be converted to electric signal after fluorescence being detected by photomultiplier.The power of electric signal then reflects radioactive intensity.The present invention is based on conventional hole pressure touching methods probe, propose a kind of safe, quick, radioactive intensity in situ detection instrument that testing cost is cheap, for the evaluation of Rock And Soil radioactive intensity provides quick, strong testing tool.
Summary of the invention
technical matters:the technical problem to be solved in the present invention cannot carry out the radioactive in-situ evaluation of the soil body for domestic, propose a kind of can be used for environmental area can the environmental pore-pressure static sounding of in situ detection soil body radioactive intensity.Utilize this probe can effectively judge by the alpha-contamination soil body, and accurately judge to confirm its radioactivity.
technical scheme:environmental pore-pressure static sounding in situ detection soil body radioactive intensity of the present invention, adopt concentric cable to be connected transmission of signal and data with analog to digital converter on the top of this probe, the first half in this probe has been linked in sequence analog to digital converter, two-dimentional tiltmeter and prime amplifier from top to down; Sidewall friction cylinder is provided with in the Lower Half of probe, sidewall friction cylinder inside is provided with a pair lead shield, photomultiplier, NaI (TI) scintillation crystal is provided with between a pair lead shield, have pore water pressure sensor at a pair lead shield, prime amplifier, photomultiplier, NaI (TI) scintillation crystal and pore water pressure sensor are linked in sequence; Sidewall friction cylinder sidewall corresponding to NaI (TI) scintillation crystal is provided with stainless steel thin-wall, connects porose press filtration ring and circular cone probe in the below of sidewall friction cylinder.
Of the present invention can the environmental pore-pressure static sounding of in situ detection soil body radioactive intensity, its radioactive intensity measure portion is primarily of the Circuits System composition of concentric cable, analog to digital converter, prime amplifier, lead shield, photomultiplier, NaI (TI) scintillation crystal, stainless steel thin-wall and its inside.When probe is after rating test is carried out in indoor, suitable operating voltage is selected to carry out site test.Earth's surface load system inputs high-low voltage by concentric cable, for the radiological measuring of probe provides operating voltage.When in the injection soil of popping one's head in, radioactive source in soil sends radioactive ray, because radioactive ray have very strong penetrability, what therefore can affect by feeler lever hardly is passed to inner NaI (TI) scintillation crystal of probe, there is photoelectric effect, Compton scattering and electron-positron pair with scintillation crystal simultaneously and produce effect, and then produce fluorescence phenomenon.Photomultiplier produces electric pulse after absorbing fluorescent electronic, after prime amplifier amplifies, be passed to analog to digital converter.Received simulating signal is converted to digital signal by analog to digital converter, then is integrated in by all signals on same concentric cable and transmits, and is preserved, and draw the sectional view of real-time continuous by the Microcomputer Collecting on earth's surface and storage system.Photomultiplier and NaI (TI) scintillation crystal integrate, and reduce the error because light path loss causes.Lead shield is placed in the two ends of photomultiplier and NaI (TI) scintillation crystal respectively, reduces the probe radioactive impact in forward and backward position around, makes detected result farthest represent the radioactivity at current depth place.Stainless steel thin-wall reduces radioactive ray through the loss that may exist during feeler lever sidewall, and faint radiation signal also can be detected by environmental probe of the present invention.
beneficial effect:can pollute the underground soil body and underground water containing active sediment or nuke rubbish etc., directly or indirectly serious threat be caused to health and environment.Current Radio valuation method takes drill hole sampling and shop experiment usually, and installs observation of groundwater levels well.But sampling on the one hand produces agitation error, sample can produce radiological hazard with the contact of human body on the other hand, also relates to simultaneously and gathering and the shortcoming such as experimentation cost is too high, analytical cycle is long.
The invention solves domestic existing single doube bridge quiet spy technology and can not detect the radioactive defect of the underground soil body, can the radioactive intensity of the effective evaluation soil body, thus the existence judging radioactive pollutant in the soil body is whether.Static sounding technology is made to be engaged in Geotechnical Engineering field more accurately, all sidedly.This technology has the feature of continuity, reliability and repeatability.
Accompanying drawing explanation
Fig. 1 is component arrangement figure of the present invention;
Wherein have: concentric cable 1, analog to digital converter 2, two-dimentional tiltmeter 3, prime amplifier 4, sidewall friction cylinder 5, lead shield 6, photomultiplier 7, NaI (TI) scintillation crystal 8, stainless steel thin-wall 9, pore water pressure sensor 10, hole press filtration ring 11, circular cone probe 12.
Embodiment
Environmental pore-pressure static sounding in situ detection soil body radioactive intensity of the present invention adopts concentric cable 1 to be connected transmission of signal and data with analog to digital converter 2 on the top of this probe, the first half in this probe has been linked in sequence analog to digital converter 2, two-dimentional tiltmeter 3 and prime amplifier 4 from top to down; Sidewall friction cylinder 5 is provided with in the Lower Half of probe, sidewall friction cylinder 5 inside is provided with a pair lead shield 6, photomultiplier 7, NaI (TI) scintillation crystal 8 is provided with between a pair lead shield 6, have pore water pressure sensor 10 at a pair lead shield 6, prime amplifier 4, photomultiplier 7, NaI (TI) scintillation crystal 8 and pore water pressure sensor 10 are linked in sequence; Sidewall friction cylinder 5 sidewall corresponding to NaI (TI) scintillation crystal 8 is provided with stainless steel thin-wall 9, connects porose press filtration ring 11 and circular cone probe 12 in the below of sidewall friction cylinder 5.
First carry out the indoor standardization test of popping one's head in, select suitable operating voltage interval.Earth's surface load system inputs high-low voltage by concentric cable, for the radiological measuring of probe provides operating voltage.When in the injection soil of popping one's head in, the radioactive source in soil sends radioactive ray, with scintillation crystal, photoelectric effect, Compton scattering and electron-positron pair occurs simultaneously and produces effect, and then generation fluorescence phenomenon.Photomultiplier produces electric pulse after absorbing fluorescent electronic, after prime amplifier amplifies, be passed to analog to digital converter.Received simulating signal is converted to digital signal by analog to digital converter, then is integrated in by all signals on same concentric cable and transmits, and is preserved, and draw the sectional view of real-time continuous by the Microcomputer Collecting on earth's surface and storage system.Photomultiplier and NaI (TI) scintillation crystal integrate, and reduce the error because light path loss causes.Lead shield is placed in the two ends of photomultiplier and NaI (TI) scintillation crystal respectively, reduces the probe radioactive impact in forward and backward position around, makes detected result farthest represent the radioactivity at current depth place.Stainless steel thin-wall reduces radioactive ray through the loss that may exist during feeler lever sidewall, and faint radiation signal also can be detected by environmental probe of the present invention.
Hole press filtration ring 11 thickness is 5 mm, and probe does not wait end area ratio to be 0.8.
The cone angle of circular cone probe 12 is 60 °, and it is 10 cm that cone basal cross section amasss
2, sidewall friction cylinder 5 surface area 150 cm
2.
The thickness of stainless steel thin-wall 9 is 4.2mm, and length is 60mm.
NaI (TI) scintillation crystal 8 is right cylinder, and bottom surface radius is 10mm, and height is 50mm.
Lead shield 6 is right cylinder, and bottom surface radius is 12mm, and height is 5mm.
The thickness of stainless steel thin-wall is 4.2mm, and length is 60mm.
Claims (1)
1. the environmental pore-pressure static sounding in situ detection soil body radioactive intensity, it is characterized in that adopting concentric cable (1) to be connected transmission of signal and data with analog to digital converter (2) on the top of this probe, the first half in this probe has been linked in sequence analog to digital converter (2), two-dimentional tiltmeter (3) and prime amplifier (4) from top to down; Sidewall friction cylinder (5) is provided with in the Lower Half of probe, sidewall friction cylinder (5) inside is provided with a pair lead shield (6), photomultiplier (7), NaI (TI) scintillation crystal (8) is provided with between a pair lead shield (6), have pore water pressure sensor (10) a pair lead shield (6), prime amplifier (4), photomultiplier (7), NaI (TI) scintillation crystal (8) and pore water pressure sensor (10) are linked in sequence; Sidewall friction cylinder (5) sidewall corresponding to NaI (TI) scintillation crystal (8) is provided with stainless steel thin-wall (9), connects porose press filtration ring (11) and circular cone probe (12) in the below of sidewall friction cylinder (5);
Hole press filtration ring (11) thickness is 5mm, and probe does not wait end area ratio to be 0.8;
The cone angle of circular cone probe (12) is 60 °, and cone basal cross section amasss as 10cm
2, sidewall friction cylinder (5) surface area 150cm
2;
The thickness of stainless steel thin-wall (9) is 4.2mm, and length is 60mm;
NaI (TI) scintillation crystal (8) is right cylinder, and bottom surface radius is 10mm, and height is 50mm;
Lead shield (6) is right cylinder, and bottom surface radius is 12mm, and height is 5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210327013.0A CN102841369B (en) | 2012-09-06 | 2012-09-06 | Environment piezocone penetration test probe used for detecting soil mass radioactive intensity in situ |
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| CN201210327013.0A CN102841369B (en) | 2012-09-06 | 2012-09-06 | Environment piezocone penetration test probe used for detecting soil mass radioactive intensity in situ |
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| CN102841369A CN102841369A (en) | 2012-12-26 |
| CN102841369B true CN102841369B (en) | 2015-04-15 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046524A (en) * | 2012-12-28 | 2013-04-17 | 东南大学 | Piezocone penetration test probe for probing underground magnetic field intensity |
| CN103061321B (en) * | 2013-01-08 | 2014-12-17 | 东南大学 | Cone penetrometer for evaluating penetration property of unsaturated soil |
| JP2016045124A (en) * | 2014-08-25 | 2016-04-04 | 国立研究開発法人産業技術総合研究所 | Estimation method for depth distribution of radioactive substance in soil |
| CN104634795A (en) * | 2014-12-18 | 2015-05-20 | 东南大学 | Environmental pore pressure probe capable of effectively detecting heavy metal elements in deep soil body |
| JP6527703B2 (en) * | 2014-12-19 | 2019-06-05 | 松原 岩夫 | Radiation dose measuring device, radiation measuring method and radiation dose map producing method |
| CN104570039A (en) * | 2014-12-30 | 2015-04-29 | 成都理工大学 | Weak-radioactivity detection device and method |
| CN109766575B (en) * | 2018-12-04 | 2022-04-08 | 东南大学 | Temperature compensation and inter-dimensional decoupling method for pore pressure static sounding probe |
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| DE19617106A1 (en) * | 1996-04-19 | 1997-10-23 | Lla Umwelttechnische Analytik | Measurement probe for organic contaminants in water and earth by fluorescent spectroscopy |
| CN101858985A (en) * | 2010-03-18 | 2010-10-13 | 成都理工大学 | Multifunctional rare earth product radioactivity detecting instrument based on composite detector |
| CN201635064U (en) * | 2010-04-12 | 2010-11-17 | 东南大学 | Resistivity static sounding probe |
| CN102183780A (en) * | 2011-02-14 | 2011-09-14 | 成都理工大学 | Nuclide recognition device in high-level radioactive environment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2293829Y (en) * | 1996-09-06 | 1998-10-07 | 湖南省交通科学研究所 | Deep nucleon density water content measuring instrument |
| CN101576514B (en) * | 2009-06-12 | 2012-03-07 | 北京紫方启研科技有限公司 | Portable X-ray detector based on highly sensitive line array detector |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19617106A1 (en) * | 1996-04-19 | 1997-10-23 | Lla Umwelttechnische Analytik | Measurement probe for organic contaminants in water and earth by fluorescent spectroscopy |
| CN101858985A (en) * | 2010-03-18 | 2010-10-13 | 成都理工大学 | Multifunctional rare earth product radioactivity detecting instrument based on composite detector |
| CN201635064U (en) * | 2010-04-12 | 2010-11-17 | 东南大学 | Resistivity static sounding probe |
| CN102183780A (en) * | 2011-02-14 | 2011-09-14 | 成都理工大学 | Nuclide recognition device in high-level radioactive environment |
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