Готові списки джерел за темами / Soils

Добірка наукової літератури з теми "Soils"

Автор: Grafiati
Опубліковано: 4 червня 2021
Оновлено: 22 червня 2024

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Зміст

  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій
  6. Звіти організацій

Статті в журналах з теми "Soils":

1

Hamad, Asal Mahmud, and Mahmood Gazey Jassam. "A Comparative Study for the Effect of Some Petroleum Products on the Engineering Properties of Gypseous Soils." Tikrit Journal of Engineering Sciences 29, no. 3 (October 15, 2022): 69. http://dx.doi.org/10.25130/tjes.29.3.7.

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Gypseous soils are considered problematic soils because the soil cavities happen during receiving the water or this type of soil and solving gypsum materials and contract in a soil volume. In this study, three types of gypseous soils are used; soil1, soil2, and soil3 with gypsum content (28.71%, 43.6%, and 54.88%) respectively, petroleum products (engine oil, fuel oil, and kerosene) are added to the soils with percentages (3%, 6%, 9%, and 12%) for each product. The result showed that specific gravity, liquid limit, optimum moisture content (O.M.C), and maximum dry density decreased with an increased percentage of product for all types of products. The direct shear (dry and soaked case) results show that increasing the (angle of internal friction and the soil cohesion) for soil1, soil2, and soil3 by adding engine oil and fuel oil. Still, when the soils were treated with kerosene, the angle of internal friction increased while cohesion decreased. The collapse potential for the treated soils increases with increasing gypsum content for all petroleum products. The collapse potential (CP) for (soil1) decreased by 47% when using 6% of the engine oil, 48.8% when using 9% of the fuel oil, and 55% when using 9% of the kerosene. The same percentage of the petroleum products (engine oil, fuel oil, and kerosene) decrease the collapse potential for (soil2), (47%, 46%, and 50%) respectively and decrease the collapse potential for (soil 3), (51%, 47.7%, and 52%) respectively. In the unconfined compressive test applied on (soil1) using maximum density, the results show that the soil strength increased (26% and 10%) when using 6% and engine oil and fuel oil, respectively, while the soil strength decreased by 29% when treated with 9% of kerosene.
2

Manssour, Abdou Maman, Laouali Abdoulkadri, Doudoua Ibrahim Ismaël, and Alzouma Mayaki Zoubeirou. "Farmer’s Perception and Bio-Indicators of Soil Fertility in Eastern Niger." Scholars Academic Journal of Biosciences 9, no. 11 (November 25, 2021): 373–78. http://dx.doi.org/10.36347/sajb.2021.v09i11.007.

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Since ancient times, peasants have relied on the presence of some plants or animals to assess soi’s fertility. This study carried out in Dogo site in Niger and that aim is ti determine the main farmer indicators of soil fertility assessment. For this, an individual semi-structured questionnaire was administered to the farmers. Results showed that several types of biological indicators are used by farmers to assess soil’s fertility through the presence or absence of some plants and/or animals. Thus, Cenchrus biflorus, Cyperus alopeuroides, Alysicarpus ovalifolius, Brachiaria spp have been cited as non-woody fertility indicator species. As for Faidherbia albida, Acacia nilotica, Piliostigma reticulatum, they were cited as woody species indicative of fertile soils. Also, Striga hermonthica, Aristida stipoides, Ipomoea koschyana, Euphorbia forskalii, Ipomoea cosunosperma, Alysicarpus ovalifolius, Commelina benghalensis were considered as non-woody indicator species of poor soils and Prosopis juliflora, Lannasinarima indicuticosa in poor soils woody species.
3

Pahlevi Munirwan, Reza, and Munirwansyah Munirwansyah. "Assessing slope failure of soil erodibility problem by soil dispersive identification." E3S Web of Conferences 340 (2022): 01006. http://dx.doi.org/10.1051/e3sconf/202234001006.

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Dispersive soils are becoming a common building material. Due to their susceptibility to internal erosion and leakage, dispersive soils should only be used in combination with precise engineering measures to avoid catastrophic failures. Dispersive soils stabilization is critical and has been investigated in several studies conducted throughout the world. Erosion is a significant issue in structures built on sloping contours. As was the case with St. 670+250 Lipat Kajang road in Aceh Singkil. Soil erosion happens as a result of water’s dispersion and transport force. Dispersive soil is one of the factors that contribute to an increase in the soil erodibility index. The objective of this research is to develop a method for enhancing the soil’s dispersive qualities. In this investigation, specimens were prepared in three different soil mix plans (10%, 20%, and 30%) and then tested using a pinhole. The quantity of erodibility that happens in Sta. 670 + 250 Lipat Kajang - Aceh Singkil Regency is based on the results of testing the soil's dispersive properties because the soil in this area is highly dispersive.
4

Najafi-Ghiri, M., and A. Abtahi. "Potassium fixation in soil size fractions of arid soils." Soil and Water Research 8, No. 2 (May 15, 2013): 49–55. http://dx.doi.org/10.17221/52/2012-swr.

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Amounts of potassium (K) fixed in soil fractions of 10 calcareous soils of southern Iran were measured to evaluate the contributions of different soil size fractions to K fixation. Soil particles were fractionated after dispersion of the soils with an ultrasonic probe. Potassium fixation analysis was done by addition of 1000 mg K/kg samples. Mineralogy of the size fractions was determined by X-ray diffraction. The clay fractions were dominated by smectite, chlorite, mica, and palygorskite. Potassium fixation capacities ranged from 104 to 148 mg/kg for clay, from 102 to 155 mg/kg for silt, and from 96 to 187 mg/kg for sand fractions. A positive and significant relationship (P < 0.05) was obtained between K fixation capacity and smectite content for the clay fractions. High amounts of K fixed in the sand fraction may be explained by a larger diffusion path of fixed K out of the frayed edges of micaceous and smectitic minerals into the extracting solution, low cation exchange capacity (CEC) of the coarse fraction and thereby the high concentration gradient along solution and interlayers, physical entrapment of K ions in coarse aggregates cemented by carbonates, and by the presence of clay particles in coarse fractions due to incomplete dispersion of coarse aggregates.
5

Cui, Jifei, Yanhao Jin, Yingjie Jing, and Yu Lu. "Elastoplastic Solution of Cylindrical Cavity Expansion in Unsaturated Offshore Island Soil Considering Anisotropy." Journal of Marine Science and Engineering 12, no. 2 (February 9, 2024): 308. http://dx.doi.org/10.3390/jmse12020308.

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An elastoplastic analysis scheme for the cylindrical cavity expansion in offshore islands unsaturated soils considering anisotropy is established. The hydraulic properties and anisotropy caused by stress of unsaturated soils are coupled in an elastoplastic constitutive matrix for unsaturated soil to obtain the governing equations for the cylindrical cavity expansion problem, with an analytical solution that utilizes the original hydro-mechanical state of the soil as the initial conditions. Through a comparative analysis with other analytical solutions, the effectiveness of the new solution is verified. Moreover, the swelling response of the cylindrical cavity expansion in unsaturated soils is examined by systematically analyzing different parameters of the surrounding soil. The findings reveal that the development and rate of anisotropy in normal consolidated soil and over-consolidated soil exert a significant impact on the soil’s mechanical characteristics. Nevertheless, the alteration in the model constant h has little effect on the soil’s mechanical characteristics. The analytical solution introduces anisotropy and broadens the expansion theory of unsaturated soils to yield a more comprehensive theoretical framework for the comprehensive analysis of offshore islands’ unsaturated soils.
6

Ngole-Jeme, Veronica M. "Fire-Induced Changes in Soil and Implications on Soil Sorption Capacity and Remediation Methods." Applied Sciences 9, no. 17 (August 21, 2019): 3447. http://dx.doi.org/10.3390/app9173447.

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Vegetation changes caused by fire events are visible instantly but changes in soils are less apparent, and could be short-term, long-term or permanent in nature. Research has shown that soils undergo changes in their mineralogical, geochemical, physico-chemical and biological properties after a fire event that may vary depending on the intensity and duration of the fire, and the properties of the soil. Some of these properties make significant contributions towards soil’s ability to sorb contaminants. Changes in these properties could affect soil sorption complex and the effectiveness of remediation methods used to clean these soils when contaminated. This review synthesizes available information on fire-induced changes in soil properties affecting soil sorption and the factors which dictate these changes. The implications of changes in these properties on the soil’s natural attenuation capacity and choice of remediation method to clean up fire-affected contaminated soils are also discussed.
7

Sturman, V. I., and A. N. Loginovskaya. "BACKGROUND CONCENTRATION OF HEAVY METALS (LEAD, CADMIUM, ZINC, COPPER, NICKEL, ARSENIC, MERCURY) IN SURFACE SOILS OF UDMURTIA CONTROLLED AT ENGINEERING-ECOLOGICAL RESEARCHES." Bulletin of Udmurt University. Series Biology. Earth Sciences 30, no. 3 (October 29, 2020): 285–94. http://dx.doi.org/10.35634/2412-9518-2020-30-3-285-294.

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Materials of engineering-ecological researches on various economic objects in Udmurtia are processed and systematized. Average (background) concentration of the heavy metals which are subject to obligatory control at engineering-ecological researches (lead, cadmium, zinc, copper, nickel, arsenic, mercury) for the main associations of soils and most wide-distributed kinds of soils are defined. It is revealed that with decreasing the soil’s podzol content and increasing the soil’s clay content, concentrations of heavy metals naturally raise. In general, similar soils are characterized by similar concentrations of heavy metals and similar ratios of concentration. It is established that excesses of hygienic standards on such elements as nickel, arsenic and to a lesser extent zinc, copper and cadmium, are not only something exclusive in Udmurtia, but also spreading more and more widely, especially in soils of light structure. The received average concentration can be accepted as background one at the subsequent engineering-ecological researches in the region.
8

Islam, ABMS, ZH Khan, and AR Mazumder. "Pedogenesis And Characterization Of Some Soils From The Chalan Beel Of Bangladesh." Journal of the Asiatic Society of Bangladesh, Science 40, no. 2 (December 30, 2014): 271–81. http://dx.doi.org/10.3329/jasbs.v40i2.46025.

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Twenty two soil samples from four pedons representing some established soil series namely Jaonia, Haiti, Taras and Digli from the Chalan beel area of Bangladesh were studied in the field as well as in the laboratory for their pedogenesis and characterization. All the soils are heavy textured with clay contents ranging from 47 to 60 percent. The soils are moderately acidic to neutral in reaction with high base saturation. The soils have developed redoximorphic features including redox concentration and redox depletion due to periodic flooding more than 4 months in the monsoon season. Development of cambic horizon in these soils is the most notable morphogenetic feature. Gleization and weak hydromorphism are the dominant pedogenic processes. At the subgroup level the soiis were classified as Typic Endoaquepts and Aerie Endoaquepts. Finally the soiis are characterized at the family level of soil taxonomy. Asiat. Soc. Bangladesh, Sci. 40(2): 271-281, December 2014
9

R, NAGARAJAN, and MANICKAM T.S. "ZINC FIXING CAPACITY OF RICE SOILS." Madras Agricultural Journal 72, October (1985): 572–76. http://dx.doi.org/10.29321/maj.10.a02406.

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An incubation study with labelled 65Zn was conducted to study the pattern of release and fixation of added 65Zn in 15 representative rice soils of Tamil Nadu at 10 levels of added 65Zn viz., 0. 2.5, 5.0. 7.5, 10, 20, 30, 40, 50 and 100/u/g of soil. The result showed that the DTPA extractable 65Zn was a function of added 65Zn and the rate of extractability was more in coarse textured soils than in clayey solls. The rate of extractability of added 65za had positive correlations with fine and coarse sand fractions and negative relationships with clay and organic carbon content of the soils. The Zn, fixing capacity revealed an exactly opposite trend to that of Zn extractability indicating higher Zn fixing capacity in clayey soils than the sandy loam soils.
10

Brodský, L., A. Klement, V. Penížek, R. Kodešová, and L. Borůvka. "Building soil spectral library of the Czech soils for quantitative digital soil mapping." Soil and Water Research 6, No. 4 (November 28, 2011): 165–72. http://dx.doi.org/10.17221/24/2011-swr.

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  Spectral libraries are the data archives of spectral signatures measured on natural and/or man-made materials. Here, the objective is to build a soil spectral library of the Czech soils (SSL-CZ). Further on, the overall aim is to apply diffuse reflectance spectroscopy as a tool for digital soil mapping. An inevitable part of the library is a metadata database that stores the corresponding auxiliary information on the soils: type of material (soil, parent material), sample preparation, location of the sample with geographic coordinates, soil classification, morphological features, soil laboratory measurements – chemical, physical, and potential biological properties, geophysical features of and climatological information on the sample location. The metadata database consists of seven general tables (General, Spatial, Soil class, Environmental, Auxiliary, Analytical and Spectra) relationally linked together. The stored information allows for a wide range of analyses and for modelling developments of digital soil mapping applications. An example of partial least-square regression (PLSR) modelling for soil pH and clay content with 0.84 and 0.68 coefficients of determination is provided on the subset of the collected data. Currently, the SSL-CZ database contains more than 500 records in the first phase of development. Spectral reflectance signatures are stored in the range of 350 to 2500 nm with a step of 1 nm measured by ASD FieldSpec 3. The soil spectral library developed is fully compatible with Global Soil Spectral Library (Soil Spectroscopy Group).
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Статті в журналах Дисертації Книги

Дисертації з теми "Soils":

1

Robert, Dilan Jeyachandran. "Soil-pipeline interaction in unsaturated soils." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/265508.

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Pipelines that are used for the transport of energy and services are very important lifelines to modem society. Though pipelines are generally buried in unsaturated soils, the design guidelines are based on the assumption that the soil is either dry or fully saturated. For certain geotechnical problems, this assumption may not be acceptable because the water meniscus formed between soil particles creates an additional normal force between them by suction, which in turn forms temporary bonds. A recent series of large-scale physical model experiments at the Pipeline Engineering Research Laboratory (PERL) of Tokyo Gas, Japan show a higher peak load under unsaturated conditions compared to dry conditions. In contrast, recent experiments performed at Cornell University (CU) show that the soil-load due to lateral pipeline movement in dry and unsaturated sands are virtually the same. Thus, the effect of partial saturation on soil loading to pipeline may be different depending on soil type, moisture content and density. The current study investigates this problem through triaxial testing and constitutive modelling of the unsaturated soils used for the experiments and finite element simulations of the experiments. The mechanical behaviour of the sands used in the physical model experiments has been investigated by conducting a series of laboratory experiments. When compacted to the same energy level, Tokyo Gas sand exhibits larger strength in unsaturated conditions than in dry conditions at low confining stress levels mainly due to the suction-induced apparent cohesion generated by the fine particles present in the sand. In contrast, for coarser Cornell sand, the suction effect is found to be small even at low confining stress level, and hence the strength in unsaturated conditions is similar to that in dry ( or fully saturated) conditions. To capture the observed behaviour of dry as well as unsaturated soils, advanced constitutive soil models were developed. For dry (or fully saturated) soils, the modified Mohr-Coulomb and Original Nor-Sand (Cheong, 2006) models were able to simulate the general behaviour including the strain softening effect. To cater for the behaviour of unsaturated soils, the saturated versions of the NorSand and the modified Mohr-Coulomb models were modified in conjunction with the generalised effective stress framework. By simulating the triaxial experimental data, it is demonstrated that the developed models can predict the realistic soil behaviour of unsaturated soils. Using the developed models, the large scale physical model experiments of pipelines subjected to lateral soil movements at PERL and CU were simulated by the explicit finite element method. Good agreement was found between the numerical models and the experiments. Further FE analyses were conducted to investigate the pipeline behaviour under lateral soil movement at conditions of different HID's, moisture contents, and relative densities. The results were synthesized to produce new normalised pipe load charts. Three dimensional finite element analysis was performed to simulate the soil-pipeline interaction under strike-slip fault movements. The finite element model was first validated by comparing the computed results to the data produced from a full scale experiment carried out at CU. The analysis was then further extended by varying the initial conditions of the sand (sand type, density, moisture content, etc.), pipe material, pipe burial depth, and pipeline-fault rupture inclination. It was found in all cases that the peak lateral loads on the pipelines subjected to strike-slip fault movements are less than or equal to the peak loads computed by the 2-D lateral movement simulations.
2

Ekanayake, Jagath C. "Soil water movement through swelling soils." Lincoln University, 1990. http://hdl.handle.net/10182/1761.

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The present work is a contribution to description and understanding of the distribution and movement of water in swelling soils. In order to investigate the moisture distribution in swelling soils a detailed knowledge of volume change properties, flow characteristics and total potential of water in the soil is essential. Therefore, a possible volume change mechanism is first described by dividing the swelling soils into four categories and volume change of a swelling soil is measured under different overburden pressures. The measured and calculated (from volume change data) overburden potential components are used to check the validity of the derivation of a load factor, ∝. Moisture diffusivity in swelling soil under different overburden pressures is measured using Gardner's (1956) outflow method. Behaviour of equilibrium moisture profiles in swelling soils is theoretically explained, solving the differential equation by considering the physical variation of individual soil properties with moisture content and overburden pressure. Using the measured volume change data and moisture potentials under various overburden pressures, the behaviour of possible moisture profiles are described at equilibrium and under steady vertical flows in swelling soils. It is shown that high overburden pressures lead to soil water behaviour quite different from any previously reported.
3

Stinghen, Geovanne Silva. "Assessment of nitrogen efficiency in maize due to soil compaction and changes in soil physical properties /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422967.

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4

Njie, Momodou. "Modelling soil moisture dynamics in vegetated soils." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406159.

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5

Dash, Suresh R. "Lateral pile soil interaction in liquefiable soils." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543468.

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6

Dickey, Juliana Sloan. "The effects of selected nitrogen and sulfur applications on soil pH, water soluble sulfate, DTPA extractable iron, manganese, copper and zinc on selected Arizona soils." Thesis, The University of Arizona, 1985. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1985_190_sip1_w.pdf&type=application/pdf.

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7

Young, Fred J. "Spatial variability of soil properties within a loess-covered, upland landscape /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9823319.

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8

Barzegar, Abdolrahman. "Structural stability and mechanical strength of salt-affected soils." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phb296.pdf.

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Copies of author's previously published articles in pocket inside back cover. Bibliography: leaves 147-160. This thesis outlines the factors affecting soil strength and structural stability and their interrelationship in salt-affected soils. The objectives of this study are to investigate the influence of clay particles on soil densification and mellowing, the mellowing of compacted soils and soil aggregates as influenced by solution composition, the disaggregation of soils subjected to different sodicities and salinities and its relationship to soil strength and dispersible clay and the effect of organic matter and clay type on aggregation of salt-affected soils.
9

Thakali, Sagar. "Terrestrial biotic ligand model (TBLM) for copper, and nickel toxicities to plants, invertebrates, and microbes in soils." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.00 Mb., 340 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3221133.

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10

Nelson, Paul Netelenbos. "Organic matter in sodic soils : its nature, decomposition and influence on clay dispersion." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phn4281.pdf.

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Bibliography: leaves 147-170. Aims to determine the influence of sodicity on the nature and decomposition of organic matter; and the influence of organic matter and its components on the structural stability of sodic soils.
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Книги з теми "Soils":

1

Dubbin, William. Soils. London: The Natural History Museum, 2001.

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2

Troeh, Frederick R. Soils and soil fertility. 5th ed. New York: Oxford University Press, 1993.

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3

Troeh, Frederick R. Soils and soil fertility. 6th ed. Ames, Iowa: Blackwell Pub., 2005.

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4

Bridges, E. M. World soils. 2nd ed. Cambridge: Cambridge University Press, 1990.

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5

Paul, Bowles John, Pesch Barbara B, and Brooklyn Botanic Garden, eds. Soils. Brooklyn, N.Y: Brooklyn Botanic Garden, 1986.

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6

A, McKeague J., Canada. Agriculture Canada. Research Branch., and Land Resource Research Institute (Canada), eds. Concepts and classification of Gleysolic soils in Canada. Ottawa: Agriculture Canada, Research Branch, 1986.

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7

Winegardner, Duane L. An introduction to soils for environmental professionals. Boca Raton: Lewis Publishers, 1996.

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8

Fredlund, D. G. Soil mechanics for unsaturated soils. New York: Wiley, 1993.

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9

Fredlund, D. G., and H. Rahardjo. Soil Mechanics for Unsaturated Soils. Hoboken, NJ, USA: John Wiley & Sons, Inc., 1993. http://dx.doi.org/10.1002/9780470172759.

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10

E, Alley Darrell, Forestry Sciences Laboratory (Columbia, Mo.), and United States Forest Service, eds. Soil sampler for rocky soils. [Columbia, Mo.?]: U.S. Dept. of Agriculture, Forest Service, North Carolina Forest Experiment Station, 1997.

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Частини книг з теми "Soils":

1

Castilho, Pierre del, and Rainer Breder. "Soils and Soil Solutions." In Sampling and Sample Preparation, 43–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60632-8_5.

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2

Tedrow, J. C. F., and F. C. Ugolini. "Antarctic Soils." In Antarctic Soils and Soil Forming Processes, 161–77. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/ar008p0161.

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3

Bridget Gleeson, Deirdre. "Soil Biological Processes in Urban Soils." In Urban Soils, 243–91. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87316-5_8.

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4

Osman, Khan Towhid. "Concepts of Soil." In Soils, 1–7. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_1.

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5

Osman, Khan Towhid. "Plant Nutrients and Soil Fertility Management." In Soils, 129–59. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_10.

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6

Osman, Khan Towhid. "Problem Soils and Their Management." In Soils, 161–74. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_11.

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7

Osman, Khan Towhid. "Soil Resources and Soil Degradation." In Soils, 175–213. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_12.

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Osman, Khan Towhid. "Wetland Soils." In Soils, 215–27. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_13.

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Osman, Khan Towhid. "Forest Soils." In Soils, 229–51. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_14.

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Osman, Khan Towhid. "Climate Change and Soil." In Soils, 253–61. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5663-2_15.

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Тези доповідей конференцій з теми "Soils":

1

Kaminski, Pauline, Jürgen Grabe, and Zeest Fatima. "Miniaturised Testing Device for the Qualitative Analysis of Gas Exsolution in Soil." In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-101605.

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Abstract The presence of gas is a widespread phenomenon in marine and coastal soils, often accompanied by complications in engineering application. The characteristics of the gas phase in the pore space are relevant for the assessment of the soil mechanical implications. In granular soils the formation of capillary bridges between the soil particles can invoke cohesive forces. In fine-grained soils gas-induced fractures may weaken the soil structure. Additionally, an excessive gas production leads to a build-up of pore pressures and can thereby trigger a liquefaction failure in granular soils. To enable a differentiated investigation of these features, however, it is vital to look into the inner pore space of a gassy soil. For this purpose, a miniaturised experimental set-up was developed which allows for the documentation of gas bubble nucleation and growth in a soil’s pore space by means of the imaging technique X-ray computed tomography. Herein, gassy soil samples with a stationary grain structure are obtained by means of the axis-translation technique. The degree of saturation is adjusted by a controlled pressure relief. During image processing the three phases — soil particles, pore water and gas — are identified and thus, their interaction can be studied. The microscopic insights gained with the help of this experimental set-up will allow validation or falsification of the basic theoretical assumptions on gassy soils. Furthermore, the data bears great potential for the advancement of approaches for multiphase simulation.
2

Okolelova, Alla, and Galina Egorova. "THE FACTORS INCREASING THE OBJECTIVE ASSESSMENT OF OIL PRODUCTS IN SOIL." In Land Degradation and Desertification: Problems of Sustainable Land Management and Adaptation. LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1716.978-5-317-06490-7/235-240.

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Natural objective reasons significantly complicate the objective assessment of oil products in soils: a variety of chemical forms of the pollutants connection, the soil ability to self-healing and self-cleaning, provincial features of the soil cover, lack of objective criteria.To increase the objectivity of determining the presence of oil products in soils, it is proposed to take into account the following factors: analysis methods of soils contaminated with oil products, the chemical properties of extractants extracting oil products from soil samples, the content of soil organic carbon and nonspecific organic compounds in conditionally unpolluted and oil-polluted soils, an increase in organic carbon in soils contaminated with petroleum products, units of measurement (% or mg / kg), the soil horizonin which soil samples were taken, the presence of discrepancies in GOST standards on the standardization of pollutants of organic origin in soils, the state of modern rationing of oil and oil products in soils and the terminological aspect.
3

Pospisilova, Lubica. "APPLICATION OF SOIL CONDITIONERS IN SANDY SOILS." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b32/s13.005.

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4

Andromalos, Kenneth B., Yasser A. Hegazy, and Brian H. Jasperse. "Stabilization of Soft Soils by Soil Mixing." In Soft Ground Technology Conference. Reston, VA: American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40552(301)16.

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5

Zou, L., and E. C. Leong. "Soils with Bimodal Soil-Water Characteristic Curve." In Second Pan-American Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481684.006.

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6

Bean, E. Z., and M. D. Dukes. "Soil Amendments for Mitigation of Compacted Soils." In Low Impact Development International Conference (LID) 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41099(367)66.

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7

Drnevich, Vincent P., Carlos E. Zambrano, Sochan Jung, and Julia P. Clarke. "Electrical Conductivity of Soils and Soil Properties." In GeoCongress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40972(311)40.

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8

Volokitin, Mitrofan. "PHYSICAL DEGRADATION OF SOILS DURING THEIR USE." In Land Degradation and Desertification: Problems of Sustainable Land Management and Adaptation. LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1712.978-5-317-06490-7/218-222.

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The issues related to the degradation of agrophysical parameters of soils are considered. The studies were carried out on gray forest soils of the northern forest-steppe. The assessment of the degree of degradation of the water resistance of the macrostructure of soils during their agricultural use has been carried out. The relationship between the bulk density and the lowest moisture capacity, inter-aggregate cohesion and the filtration coefficient of gray forest soil has been established. Soil losses during thawed runoff were estimated.
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Bilici, C., P. Carotenuto, T. Lunne, A. H. Augustesen, L. Krogh, H. Dias, M. C. Sougle, et al. "Offshore Geotechnical Site Characterization of Silty Soils: a Novel Database." In Innovative Geotechnologies for Energy Transition. Society for Underwater Technology, 2023. http://dx.doi.org/10.3723/xegy3943.

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Current practice in the offshore wind industry is to utilise existing CPTU soil behavior charts to identify soil type (e.g., clean sands to silty sands, sand mixtures, clay etc.). The charts identify drained clean sands and undrained clays; however there are limitations detecting silty soils. Accordingly, indication of soil behaviour is needed to define whether the engineering correlations for drained or undrained soils should be used for partial drained silty soils. This paper presents a high-quality database of CPTU and laboratory index data collected as part of a Joint Industry Project on characterisation of silty soils. The database consists of results from 23 sites (21 offshore and two onshore sites) covering a wide range of silts from silty sands to clayey silts and silt mixtures. The database is used to test existing soil behavior charts. The study provides guidelines for industry practice for geotechnical site characterization of silty soils.
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Miao, Linchang, Fei Jing, and Sandra L. Houston. "Soil-Water Characteristic Curve of Remolded Expansive Soils." In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)80.

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Звіти організацій з теми "Soils":

1

Ponder, Felix Jr, and Darrell E. Alley. Soil sampler for rocky soils. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station, 1997. http://dx.doi.org/10.2737/nc-rn-371.

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2

Gombert, D. II. Evaluation of soil washing for radiologically contaminated soils. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10163686.

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Cunnane, J. C., V. R. Gill, S. Y. Lee, D. E. Morris, M. D. Nickelson, D. L. Perry, and V. C. Tidwell. Uranium soils integrated demonstration: Soil characterization project report. Office of Scientific and Technical Information (OSTI), August 1993. http://dx.doi.org/10.2172/10180428.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1378.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1382.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1387.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1398.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1404.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1424.

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Fenton, Thomas, and Gerald Miller. Iowa Soils. Ames: Iowa State University, Digital Repository, 2016. http://dx.doi.org/10.31274/farmprogressreports-180814-1442.

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