SU620877A1 - Soil density measuring device - Google Patents
Soil density measuring deviceInfo
- Publication number
- SU620877A1 SU620877A1 SU721844025A SU1844025A SU620877A1 SU 620877 A1 SU620877 A1 SU 620877A1 SU 721844025 A SU721844025 A SU 721844025A SU 1844025 A SU1844025 A SU 1844025A SU 620877 A1 SU620877 A1 SU 620877A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- soil
- density
- measuring device
- gamma
- density measuring
- Prior art date
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Processing Of Solid Wastes (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
(54) СПОСОБ ОПРЕДЕЛЕНИЯ ПЛОТНОСТИ ГРУНТА(54) METHOD FOR DETERMINING GROUND DENSITY
Изобретение относитс к способам определени плотности грунта и может быть использовано в прикладной геофи зике, мелиорации и строительстве. Известен способ определени плотности грунта путем введени источник и детектора гамма- излучени в грунт и регистрации интенсивности гамма излучени l « Недостатком данного способа вл етс низка точность, из-за зависимости регистрируемой интенсивности рассе нных гамма-квантов, кроме плотности грунта etae от рассто ни от источника излучени , химического состава среды и начальной энергии ггилмй- излучени . .Известен способ определени плотности грунта путем его облучени потоком гамма-квантов и регистрации излучени при разных рассто ни х между источником и детектором, наход щихс над грунтом. При этом способе рассто ние между источником и детектором гамма-квантов , соответствун дее максимум и ингенсивности рассе нного излучени , и по величине этого рассто ни суд т о плотности грунта 2. Недостатком способа вл етс вли ние на результаты измерени краевого эффекта при взаимодействии гаммаквантов со средой, что снижает точность измерений. Целью изобретени вл етс повышение точности измерени . Это достигаетс тем. Что в известном способе определени плотности грунта путем его облучени потоком гамма-квантов и регистрации излучени при разных рассто ни х между источником и детектором, источник и детектор помещают вгрунт на исследуемый горизонт, регистрируют полное распределение рассе нных гамма-квантов вокруг источника, определ ют длину свободного пробега первичных r iN&ia-KBaHTpB по положению ма;ксимума полученного распределени , а плотность грунта определ ют по соотношению: / J Рг-(): 1, где fr плотность грунта; Л - длина свободного пробега первичных гамма-квантов , - влажность грунта, в - массовый коэффициент ослаблеНИИ гамма-квантов водой,//г - массо81 коэффициент ослаблени гаммаквантов грунтом.The invention relates to methods for determining the density of the soil and can be used in applied geophysics, land reclamation and construction. The known method of determining the density of the soil by introducing the source and detector of gamma radiation into the soil and recording the intensity of gamma radiation. The disadvantage of this method is low accuracy due to the dependence of the recorded intensity of scattered gamma rays, apart from the density of the soil etae the radiation source, the chemical composition of the medium and the initial energy of the gilmmy radiation. A method is known for determining the density of a soil by irradiating it with a stream of gamma rays and registering radiation at different distances between the source and the detector above the ground. In this method, the distance between the source and detector of gamma quanta, the corresponding maximum and intensity of scattered radiation, and the magnitude of this distance judge the density of the soil 2. The disadvantage of the method is the effect on the results of the measurement of the edge effect during the interaction of gamma rays with environment, which reduces the accuracy of measurements. The aim of the invention is to improve the measurement accuracy. This is achieved by those. In the known method for determining the density of a soil by irradiating it with a flux of gamma rays and registering radiation at different distances between the source and the detector, the source and detector are placed in the ground on the horizon under study, the full distribution of scattered gamma quanta around the source is determined, the length is determined the free path of the primary r iN & ia-KBaHTpB according to the position of max; the maximum of the distribution obtained, and the density of the soil is determined by the ratio: / J Pr - (): 1, where fr is the density of the soil; L is the mean free path of primary gamma quanta, is the soil moisture, B is the mass attenuation coefficient of gamma quanta by water, // g is the mass81 coefficient of gamma quanta attenuation by the soil.
На чертеже показана крива распределени интенсивности рассе нньа гамма-квантов 3 в зависимости от рассто ни Тг между центром зоны излучени источника и центром зоны регистрации детектора.The drawing shows the distribution curve of the intensity of the scattering of gamma quanta 3 as a function of the distance Tg between the center of the source radiation zone and the center of the detector detection zone.
Сущность способа заключаетс в том, что по рассто нию, соответствующему экстремуму интенсивности рассе нных гамма-квантов и равному длине свободного пробега первичных гамма-квантов Л , определ ют плотность грунта по формуле:The essence of the method is that according to the distance corresponding to the extremum of the intensity of scattered gamma quanta and equal to the mean free path of the primary gamma quanta L, the density of the soil is determined by the formula:
РгWg
f If I
где /Jf массовый коэффициент поглощени гамма-квантов грунтом.where / Jf is the mass absorption coefficient of gamma quanta by the soil.
Плотность влажного грунта определ ют по форкуле:The density of the wet soil is determined by the forelock:
г-{т- вр : g- {t- bp:
где Яв влажность грунта, itlg - массовый коэффициент поглощени гаммаквантов водой.where Yav is the soil moisture, itg is the mass absorption coefficient of gammavants by water.
Дл неоднородных грунтов в соотношени (1), (2) вход т средние значени fj. , р ид.For non-uniform soils, ratios (1), (2) include average fj values. , ID
77
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU721844025A SU620877A1 (en) | 1972-11-09 | 1972-11-09 | Soil density measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU721844025A SU620877A1 (en) | 1972-11-09 | 1972-11-09 | Soil density measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU620877A1 true SU620877A1 (en) | 1978-08-25 |
Family
ID=20531440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU721844025A SU620877A1 (en) | 1972-11-09 | 1972-11-09 | Soil density measuring device |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU620877A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2524042C1 (en) * | 2013-02-14 | 2014-07-27 | Закрытое акционерное общество "НТЦ Экофизприбор" | Method of measurement of surface density of mainly heterogeneous soils |
-
1972
- 1972-11-09 SU SU721844025A patent/SU620877A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2524042C1 (en) * | 2013-02-14 | 2014-07-27 | Закрытое акционерное общество "НТЦ Экофизприбор" | Method of measurement of surface density of mainly heterogeneous soils |
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