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Journal articles on the topic 'Soil structure'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Cotching, W. E., and K. C. Belbin. "Assessment of the influence of soil structure on soil strength/soil wetness relationships on Red Ferrosols in north-west Tasmania." Soil Research 45, no. 2 (2007): 147. http://dx.doi.org/10.1071/sr06113.

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The relationship of soil wetness to soil strength in Red Ferrosols was compared between fields of well structured to degraded soil structure. Soil structure was assessed using a visual rating. Soil resistance measurements were taken over a range of soil wetness, using a recording penetrometer. Readings were taken as the soil dried by evapotranspiration after both irrigation and rainfall events. The influence of soil wetness on penetration resistance was greater on fields with degraded structure than on well-structured fields. In fields with degraded structure, the wetter the soil, the smaller

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2

JavidSharifi, Behtash, and Sedigheh Gheisari. "EFFECTS OF STRUCTURE HEIGHT ON SEISMIC DEMAND OF MOMENT-RESISTING REINFORCED CONCRETE FRAMES CONSIDERING SOIL-STRUCTURE INTERACTION." NED University Journal of Research XVIII, no. 1 (2021): 15–32. http://dx.doi.org/10.35453/nedjr-stmech-2020-0006.

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Forces and displacements induced in a building due to structural responses to earthquake excitation are called seismic demands which depend upon the input motion, structural characteristics, site effects and the interaction of structure with soil. Structural response of three laterally non-controlled moment-resisting reinforced concrete frame structures with three different soil conditions are have been investigated in this paper. The soil conditions include loose soil, medium soil and rigid ground. The soil-structure interaction of low-, mid- and high-rise frame structures with the above ment

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3

E, Farahani. "Potassium May Have Remarkable Dispersive Effect on Soil Structure." Open Access Journal of Agricultural Research 10, no. 1 (2025): 1–2. https://doi.org/10.23880/oajar-16000383.

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Soil structure is central for ecosystem services included crop productivity and erosion control. Two important characteristics of soil structure are form and stability, which can affect soil functions such as soil fluid transport capability that regulates soil aeration and water infiltration [1]. Clay particles associated with mineral and organic soil components are essential in soil structure stability and for sustaining favourable soil conditions in agricultural soils. Monovalent cations such as sodium (Na) or potassium (K) may create clay dispersion and swelling which result in soil structu

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4

Rengasamy, P., and KA Olsson. "Sodicity and soil structure." Soil Research 29, no. 6 (1991): 935. http://dx.doi.org/10.1071/sr9910935.

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Sodic soils are widespread in Australia reflecting the predominance of sodium chloride in groundwaters and soil solutions. Sodic soils are subject to severe structural degradation and restrict plant performance through poor soil-water and soil-air relations. Sodicity is shown to be a latent problem in saline-sodic soils where deleterious effects are evident only after leaching profiles free of salts. A classification of sodic soils based on sodium adsorption ratio, pH and electrolyte conductivity is outlined. Current understanding of the processes and the component mechanisms of sodic soil beh

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5

Bezih, Kamel, Alaa Chateauneuf, and Rafik Demagh. "Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction." Civil Engineering Journal 6, no. 12 (2020): 2290–311. http://dx.doi.org/10.28991/cej-2020-03091618.

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Lifetime service of Reinforced Concrete (RC) structures is of major interest. It depends on the action of the superstructure and the response of soil contact at the same time. Therefore, it is necessary to consider the soil-structure interaction in the safety analysis of the RC structures to ensure reliable and economical design. In this paper, a finite element model of soil-structure interaction is developed. This model addresses the effect of long-term soil deformations on the structural safety of RC structures. It is also applied to real RC structures where soil-structure interaction is con

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6

Zhai, Zhanghui, Yaguo Zhang, Shuxiong Xiao, and Tonglu Li. "Undrained Elastoplastic Solution for Cylindrical Cavity Expansion in Structured Cam Clay Soil Considering the Destructuration Effects." Applied Sciences 12, no. 1 (2022): 440. http://dx.doi.org/10.3390/app12010440.

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Soil structure has significant influences on the mechanical behaviors of natural soils, although it is rarely considered in previous cavity expansion analyses. This paper presents an undrained elastoplastic solution for cylindrical cavity expansion in structured soils, considering the destructuration effects. Firstly, a structural ratio was defined to denote the degree of the initial structure, and the Structured Cam Clay (SCC) model was employed to describe the subsequent stress-induced destructuration, including the structure degradation and crushing. Secondly, combined with the large strain

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7

Liu, M. D., and J. P. Carter. "A structured Cam Clay model." Canadian Geotechnical Journal 39, no. 6 (2002): 1313–32. http://dx.doi.org/10.1139/t02-069.

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A theoretical study of the behaviour of structured soil is presented. A new model, referred to as the Structured Cam Clay model, is formulated by introducing the influence of soil structure into the Modified Cam Clay model. The proposed model is hierarchical, i.e., it is identical to the Modified Cam Clay soil model if a soil has no structure or if its structure is removed by loading. Three new parameters describing the effects of soil structure are introduced, and the results of a parametric study are also presented. The proposed model has been used to predict the behaviour of structured soil

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8

Aliboeva, M. A. "Morphological Structure Of Mountain Soils." American Journal of Agriculture and Biomedical Engineering 03, no. 12 (2021): 33–37. http://dx.doi.org/10.37547/tajabe/volume03issue12-08.

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This article discusses morphological structure of mountain soils. The mountainous regions of the Republic of Uzbekistan are located mainly in Tashkent, Surkhandarya, Samarkand, Jizzakh, Syrdarya, Fergana Valley and Navoi regions, and differ from each other in their greenery, charm and structure. Mountain soils are distributed sequentially according to the law of vertical zoning, depending on the altitude above sea level. The soil cover in these regions is characterized by their development (evolution), genesis, agrochemical, agrophysical properties and, most importantly, morphological structur

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9

Cheng, C., D. Zhao, D. Lv, S. Li, and G. Du. "Comparative study on microbial community structure across orchard soil, cropland soil, and unused soil." Soil and Water Research 12, No. 4 (2017): 237–45. http://dx.doi.org/10.17221/177/2016-swr.

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We examined the effects of three different soil conditions (orchard soil, cropland soil, unused soil) on the functional diversity of soil microbial communities. The results first showed that orchard and cropland land use significantly changed the distribution and diversity of soil microbes, particularly at surface soil layers. The richness index (S) and Shannon diversity index (H) of orchard soil microbes were significantly higher than the indices of the cropland and unused soil treatments in the 0–10 cm soil layer, while the S and H indices of cropland soil microbes were the highest in 10–20

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10

Kolaki, Aravind I., and Basavaraj M. Gudadappanavar. "Performance Based Analysis of Framed Structure Considering Soil Structure Interaction." Bonfring International Journal of Man Machine Interface 4, Special Issue (2016): 106–11. http://dx.doi.org/10.9756/bijmmi.8165.

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11

Zhang, Miao Xin, Bao Dong Liu, Peng Fei Li, and Zhi Mao Feng. "Structure-Soil Interaction of Buried Corrugated Steel Arch Bridge." Advanced Materials Research 163-167 (December 2010): 2112–17. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2112.

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Corrugated steel plate and surrounding soils are working together to share the load in buried corrugated steel structures. It is complicated to consider the structure-soil interaction, so the finite element method has already become the chief means of complicated structure analysis. Based on a practical project, considering structure-soil interaction, by using the finite element program of ANSYS, the paper set up a 2-D FE model and analyzed the soil pressure, the structural deformation and the internal force under different load conditions in detail. The analysis shows that structure-soil inte

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12

Xu, Bin Bin. "Influence of Soil Structure on the Mechanical Response of Soft Soil." E3S Web of Conferences 38 (2018): 03027. http://dx.doi.org/10.1051/e3sconf/20183803027.

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Usually the natural sedimentary soils possess structure more or less, which makes their mechanical response much different from the fully remolded soils. In this paper, the influence of soil structure on the mechanical response such as compressibility, shear, permeability is literately reviewed. It is found that the compressibility and consolidation behavior of structured and remolded soils can be divided clearly before or after the structural yield stress. The stress-strain relationship can be divided into two segments before and after the structural yield stress. Before the yield stress, the

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13

Proffitt, APB, RJ Jarvis, and S. Bendotti. "The impact of sheep trampling and stocking rate on the physical properties of a red duplex soil with two initially different structures." Australian Journal of Agricultural Research 46, no. 4 (1995): 733. http://dx.doi.org/10.1071/ar9950733.

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The effect of sheep trampling and stocking rate on the physical properties of a red duplex soil with two initially different structures was examined over an 8 week period when the soil was wet following winter rains. The experimental site was located at Merredin in Western Australia where the average annual rainfall is 307 mm. A previous long-term tillage and gypsum trial at the experimental site had resulted in the development of contrasting topsoil structures. Three grazing treatments were imposed at the trial site: grazing at the normal high stocking rate (8 DSE ha-1), grazing at half the n

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14

Lee, KE, and RC Foster. "Soil fauna and soil structure." Soil Research 29, no. 6 (1991): 745. http://dx.doi.org/10.1071/sr9910745.

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Significant effects of soil fauna on soil structure are achieved mainly by a few groups among the larger soil invertebrates that are widely distributed and generally present in large numbers. Of these groups the most important are earthworms, termites and ants. The review deals mainly with earthworms, which are distributed throughout all but the coldest and the driest regions of the world. The effects of termites and ants on soil structure are also discussed. These groups of soil animals are also widely distributed, but are most common and most effective in influencing soil structure in tropic

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15

Granados, Jaime, and Bernardo Caicedo. "Physical and numerical modelling of soil-atmosphere-structure interaction." E3S Web of Conferences 382 (2023): 06002. http://dx.doi.org/10.1051/e3sconf/202338206002.

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Extreme, extended wet and dry seasons increase the adverse effects that soil wetting and drying cycles have on the response of shallow geotechnical structures. In expansive soils, volumetric changes due to water content variations may result in the incompatibility of deformations at the soil-structure interface. This study proposes a physical approach and a numerical model to address the soil-atmosphere-structure interactions during soil saturation and desiccation. Experimental desiccation tests were performed on relatively thin, compacted kaolin clay samples that represent the soil-atmosphere

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16

Timofeeva, Yulia, Elena Sukhacheva, Boris Aparin, Vitaly Terleev, Aleksandr Nikonorov, and Luka Akimov. "Soil structure of sand quarries territory." E3S Web of Conferences 157 (2020): 02017. http://dx.doi.org/10.1051/e3sconf/202015702017.

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Anthropogenic activities are one of the leading factors of soil differentiation. Significant changes in the soil cover occur as a result of the construction of quarries. The mining industry causes the complete degradation of soils in large areas, the change of the natural soil cover and elevation around the quarries, the destruction of vegetation, disturbs biodiversity of the territory and the death of ecosystems. Soil cover structures of mining quarries have been considered on the example of the Leningrad region such as a natural conditions and environmental peculiarities typical for the whol

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17

Lin, Yunjie, Cheng Lin, Minghao Liu, and David Evans. "Soil structure effect on soil erosion potential." IOP Conference Series: Earth and Environmental Science 1334, no. 1 (2024): 012008. http://dx.doi.org/10.1088/1755-1315/1334/1/012008.

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Abstract Soil erosion poses a significant threat to water-related infrastructure such as bridges, dams, quays, and levees by detaching and transporting soil grains downstream, thereby compromising the structural support of these installations. While erosion damage is acknowledged in current design practices, understanding soil erosion parameters requires scrutiny. However, existing soil erosion databases mainly rely on reconstituted soil samples, which may differ substantially from in situ erosion due to alterations in soil structure. This study scrutinizes and contrasts the erodibilities of i

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18

Soe, Soe War, and Nyein Thant Nyein. "Study on Physical and Mechanical Properties of Dispersive Soil." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 1381–84. https://doi.org/10.5281/zenodo.3590821.

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This paper deals with determination of physical and mechanical properties of dispersive soil. Soil is the foundation material which supports loads from the overlaying structure. Soil dispersivity is mainly due to the presence of exchangeable sodium present in the structure. Dispersive soils are identified by an unstable structure, easily flocculated in water, and very erodible. Using dispersive clay soils in hydraulic structures, embankment dams, or other structures such as roadway embankments can cause serious engineering problems if these soils are not identified and used appropriately. Some

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19

Trombetta, Nicholas W., H. Benjamin Mason, Tara C. Hutchinson, Joshua D. Zupan, Jonathan D. Bray, and Bruce L. Kutter. "Nonlinear Soil–Foundation–Structure and Structure–Soil–Structure Interaction: Engineering Demands." Journal of Structural Engineering 141, no. 7 (2015): 04014177. http://dx.doi.org/10.1061/(asce)st.1943-541x.0001127.

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20

Maghsoodi, Soheib, Olivier Cuisinier, and Farimah Masrouri. "Thermo-mechanical behaviour of clay-structure interface." E3S Web of Conferences 92 (2019): 10002. http://dx.doi.org/10.1051/e3sconf/20199210002.

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The mechanical behaviour of the soil-structure interface plays a major role in the shear characteristics and bearing capacity of foundations. In thermo-active structures, due to non-isothermal conditions, the interface behaviour becomes more complex. The objective of this study is to investigate the effects of temperature variations on the mechanical behaviour of soils and soil-structure interface. Constant normal load (CNL) and constant normal stiffness (CNS) tests were performed on soil and soil-structure interface in a direct shear device at temperatures of 5, 22 and 60 °C. Kaolin clay was

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21

Maghsoodi, Soheib, Olivier Cuisinier, and Farimah Masrouri. "Thermal effects on mechanical behaviour of soil–structure interface." Canadian Geotechnical Journal 57, no. 1 (2020): 32–47. http://dx.doi.org/10.1139/cgj-2018-0583.

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Mechanical behaviour of the soil–structure interface plays a major role in the shear characteristics and bearing capacity of foundations. In thermoactive structures, due to nonisothermal conditions, the interface behaviour becomes more complex. The objective of this study is to investigate the effects of temperature variations on the mechanical behaviour of soils and the soil–structure interface. Constant normal load (CNL) and constant normal stiffness (CNS) tests were performed on the soil and soil–structure interface in a direct shear device at temperatures of 5, 22, and 60 °C. Fontainebleau

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22

Tursunov, J.A., and A.D. Kayumov. "STUDIES OF THE EFFECT OF SOAKING ON THE DEFORMABILITY OF LOESS SOILS IN BUILDINGS AND STRUCTURES." Mining machines and technology 1, no. 11 (2025): 68–71. https://doi.org/10.5281/zenodo.15239569.

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<strong>ABSTRACT</strong>  The experience of designing and constructing structures in difficult conditions of Uzbekistan shows that in the areas of distribution of loess soils, it is necessary to take into account the variability of the material composition, structure and physico-mechanical properties of soils during soaking. It should be noted that manmade flooding leads to soaking of the soil column, therefore, as a rule, it is necessary to build buildings and structures on water-saturated soils. In this case, additional precipitation may be caused by the dissolution of salt crystals in

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23

Leuther, Frederic, and Steffen Schlüter. "Impact of freeze–thaw cycles on soil structure and soil hydraulic properties." SOIL 7, no. 1 (2021): 179–91. http://dx.doi.org/10.5194/soil-7-179-2021.

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Abstract. The ploughing of soils in autumn drastically loosens the soil structure and, at the same time, reduces its stability against external stresses. A fragmentation of these artificially produced soil clods during wintertime is often observed in areas with air temperatures fluctuating around the freezing point. From the pore perspective, it is still unclear (i) under which conditions frost action has a measurable effect on soil structure, (ii) what the impact on soil hydraulic properties is, and (iii) how many freeze–thaw cycles (FTCs) are necessary to induce soil structure changes. The a

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24

Li, Wugang, Wenhua Liu, Zhijia Xue, and Xiuli Sun. "A Constitutive Model for Overconsolidated Structured Soils Using Structural Variable." Shock and Vibration 2021 (August 9, 2021): 1–14. http://dx.doi.org/10.1155/2021/5530038.

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Due to the influence of soil structure, structured soils exhibit significantly different mechanical behavior compared to the reconstituted soils having the same material. In this work, a theoretical analysis focusing on the mechanical behavior of structured soils is presented. Based on the mechanical behavior of the structured soil, a newly defined variable structural index was used as a measurement of the integrity of soil structure based on the concept of intrinsic compression line of intact structured soils. Furthermore, a novel correlation for the variation in volume of structured soils is

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25

Patil, K. S., and Ajit K. Kakade. "Seismic Response of R.C. Structures With Different Steel Bracing Systems Considering Soil - Structure Interaction." Journal of Advances and Scholarly Researches in Allied Education 15, no. 2 (2018): 411–13. http://dx.doi.org/10.29070/15/56856.

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26

SA, Wemedo. "Impact Assessment of Gas Flaring on Soil Bacterial Community Structure and Physicochemical Property in Nigeria." Open Access Journal of Microbiology & Biotechnology 5, no. 2 (2020): 1–9. http://dx.doi.org/10.23880/oajmb-16000165.

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Gas flaring is the wasteful emission of hydrocarbon gases into the atmosphere; it is routinely used to dispose flammable gas that either is assumed unusable or uneconomical to recover. The burning of the wasteful gas has been shown to have significant environmental consequences. Therefore, this study was designed to determine the impact of gas flaring on soil bacterial spectrum and its physicochemical property. Soil microbiological quality was investigated using culture techniques while physicochemical property of the soil was analyzed using standard analytical procedures. Results obtained sho

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27

Al Qadad, A., I. Shahrour, and M. Rouainia. "Influence of the soil-atmosphere exchange on the hydric profile induced in soil-structure system." Natural Hazards and Earth System Sciences 12, no. 6 (2012): 2039–49. http://dx.doi.org/10.5194/nhess-12-2039-2012.

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Abstract. Soil-atmosphere exchange leads to a moisture change in the soil. This can cause major damage to engineering structures due to the soil expansion and shrinkage. The soil-atmosphere exchange is related to several parameters, in particular the soil characteristics and climate conditions. The presence of an engineering structure causes a variation of the hydraulic profile in the soil, which can lead to heterogeneous soil movement and consequently to structural damage. This paper presents a coupled numerical model based on the consideration of both water flow in unsaturated soils and soil

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28

Collis-George, N. "Drainage and soil structure - a review." Soil Research 29, no. 6 (1991): 923. http://dx.doi.org/10.1071/sr9910923.

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Definitions of soil structure and drainage are proposed that would allow a more useful interaction between the two areas of interest that appear to have developed independently. Drainage phenomena in three structural systems are quantitatively described. Firstly a simple uniform profile is described; then wormholes and stones are added to the upper layer of this soil; finally the upper layer is given a 23% stable macropore space and its depth is proportionately increased by biotic activity. Numerical solutions of these geometries (supported by experimental work) show that if the structure enha

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29

Dongol, Nasala, Prachand Man Pradhan, and Suman Manandhar. "Study of Pushover Analysis on RC Framed Structure with Underground Structure Considering the Effects of Soil Structure Interaction." Journal of Science and Engineering 8 (November 12, 2020): 22–29. http://dx.doi.org/10.3126/jsce.v8i0.32859.

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This study states that the effects of soil structure interaction on the Reinforced Concrete (RC) framed structures is directly influenced by the soil properties of the site. Here, one preexisting structure is taken for the study. The building is a hospital building with two underground basements. Taking into account the actual soil condition of building site, this study provides idea on the soil structure interaction on the structure The properties of springs are calculated from different standard penetration test (SPT) values, Poisson’s ratio and elasticity of soil along the depth of the soil

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30

Behnamfar, Farhad, Seyyed Mohammad Mirhosseini, and Hossein Alibabaei. "Seismic behavior of structures considering uplift and soil–structure interaction." Advances in Structural Engineering 20, no. 11 (2017): 1712–26. http://dx.doi.org/10.1177/1369433217693628.

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A common assumption when analyzing a structure for earthquake forces is that the building is positively attached to a rigid ground so that it can sustain possible tensile forces without being detached, or uplifted, from its bearing points. Considering the facts that almost no tension can be transferred between a surface foundation and soil and soft soils interact with the supported structure during earthquakes, in this research, the effects of uplift and soil–structure interaction on nonlinear seismic response of structures are evaluated. Several reinforced concrete and steel structures under

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31

Sadek, Marwan, Fadi Hage Chehade, Bassem Ali, and Ahmed Arab. "Seismic Soil Structure interaction for Shear wall structures." MATEC Web of Conferences 281 (2019): 02006. http://dx.doi.org/10.1051/matecconf/201928102006.

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For soft soil subjected to earthquake loading, the soil non linearity could significantly amplify the ground motion. This paper presents a 3D numerical study on the influence of soil non linearity on the seismic soil structure interaction for shear wall structures. Numerical simulations are conducted for both elastic and elastoplastic behaviour for the soil. Real ground motions records are used in the study. The analysis is focused on the seismic induced response of the soil and the structure in terms of displacement and velocity. The results show that considering elastic model for the soil be

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32

Molua, Collins O., and John O. Ataman. "Dynamic Analysis of Soil-Structure Interaction in Earthquake-Prone Areas." International Journal of Applied and Structural Mechanics, no. 12 (November 26, 2024): 19–29. http://dx.doi.org/10.55529/ijasm.12.19.29.

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This study used a thorough experimental method to examine the dynamic interaction between soil and structures in earthquake-prone locations. The study challenge concentrated on how different soil types and configurations influence the diversity of structural reactions under seismic loading conditions. The research utilized a mixed methods approach, which involved quantitatively analyzing soil parameters and assessing structure dynamics. The methods employed included the creation of scaled replicas depicting common architectural structures situated on various soil types, including sandy, clayey

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Kozlovskii, V. E., E. V. Gorodnova, and S. S. Kolmogorova. "STRUCTURE SETTING ON COMPOSITE-BASED SOILS." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 22, no. 1 (2020): 164–70. http://dx.doi.org/10.31675/1607-1859-2020-22-1-164-170.

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The paper studies the interaction between the building construction and composite-based soil with a view to determine its elastic properties affecting the structure deformation and internal forces. The soil model is assumed to be elastic, according to the Winkler coefficient calculated from the Kolosov stress decay function. The Galerkin numerical method used in calculations utilizes basic functions corresponding to the type of fixing the discontinuous and continuous structures. Unknown coefficients in linear combinations of basic functions are obtained via linear algebra methods, solving the

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Bengough, A. Glyn, Roy Neilson, Bryan Griffiths, and David Trudgill. "The extent to which nematode communities are affected by soil factors-a pot experiment." Nematology 4, no. 8 (2002): 943–52. http://dx.doi.org/10.1163/156854102321122566.

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AbstractFour similar, agricultural soils with distinct nematode communities were used to determine the extent to which soil and inoculum factors affected nematode community structure. The soils all had a sandy loam texture from the same geographical area and had been in pasture or arable rotation for the last 10 years. Treatments were established in pots containing a middle layer of frozen defaunated soil, sandwiched between an inoculum that was either fresh soil from the same site ('self') or a mixture of soils to give a more diverse inoculum ('mixed'). Principal component analysis indicated

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Trombetta, Nicholas W., H. Benjamin Mason, Tara C. Hutchinson, Joshua D. Zupan, Jonathan D. Bray, and Bruce L. Kutter. "Nonlinear Soil–Foundation–Structure and Structure–Soil–Structure Interaction: Centrifuge Test Observations." Journal of Geotechnical and Geoenvironmental Engineering 140, no. 5 (2014): 04013057. http://dx.doi.org/10.1061/(asce)gt.1943-5606.0001074.

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Holland, J. E., R. E. White, and R. Edis. "The relation between soil structure and solute transport under raised bed cropping and conventional cultivation in south-western Victoria." Soil Research 45, no. 8 (2007): 577. http://dx.doi.org/10.1071/sr07068.

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This study examined the relationship between soil structure and solute transport in a texture contrast soil under 2 different tillage treatments—raised beds and conventional cultivation—in south-western Victoria. Undisturbed soil samples were collected for resin-impregnation and image analysis. This enabled several descriptive parameters of macropore structure to be calculated. Large, undisturbed soil samples were also collected for a solute transport experiment using a KCl solution. A convective log-normal transfer function was used to model Cl– movement. The assessment of soil structure show

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Gao, Yang, Xiuwei Wang, Zijun Mao, et al. "Changes in Soil Microbial Community Structure Following Different Tree Species Functional Traits Afforestation." Forests 12, no. 8 (2021): 1018. http://dx.doi.org/10.3390/f12081018.

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The soil microbial community structure is critical to the cycling of carbon and nitrogen in forest soils. As afforestation practices increasingly promote different functional traits of tree species, it has become critical to understand how they influence soil microbial community structures, which directly influence soil biogeochemical processes. We used fungi ITS and bacteria 16S rDNA to investigate soil microbial community structures in three monoculture plantations consisting of a non-native evergreen conifer (Pinus sibirica), a native deciduous conifer (Larix gmelinii), and a native deciduo

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38

Alireza Lork, Ali Nikkhoo, Saeed Abachi,. "Investigating the Displacement of a Structure Equipped with Rotational Friction Damper: Considering the Structure-soil Interaction Effect." Power System Technology 48, no. 1 (2024): 96–118. http://dx.doi.org/10.52783/pst.246.

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In this research, the effect of soil and structure interaction is investigated in a structure equipped with rotational friction dampers, with several earthquake records and two types of soil. It was modeled in SAP 2000 software and analyzed under the nonlinear dynamic analysis of the time history with the records of the San Fernando, Northridge, and Imperial Valley earthquakes. The used soil was considered relatively "hard" and relatively "soft" soil based on two types of two and three soil groups based on the 2800 regulation. In this research, the soil and structure complex was subjecte

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Chian, Siau Chen, and Santana Phani Gopal Madabhushi. "Excess Pore Pressures Around Underground Structures Following Earthquake Induced Liquefaction." International Journal of Geotechnical Earthquake Engineering 3, no. 2 (2012): 25–41. http://dx.doi.org/10.4018/jgee.2012070103.

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Underground structures located in liquefiable soil deposits are susceptible to floatation following an earthquake event due to their lower unit weight relative to the surrounding saturated soil. This inherent buoyancy may cause lightweight structures to float when the soil liquefies. Centrifuge tests have been carried out to study the excess pore pressure generation and dissipation in liquefiable soils. In these tests, near full liquefaction conditions were attained within a few cycles of the earthquake loading. In the case of high hydraulic conductivity sands, significant dissipation could ta

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Alikonis, Antanas. "INFLUENCE OF CLAYEY SOIL STRUCTURE ON ITS MODULUS OF STIFFNESS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 5, no. 2 (1999): 108–15. http://dx.doi.org/10.3846/13921525.1999.10531444.

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Disturbance of soil structure influences its density, strength and deformation properties. Among other cases soil structure could be disturbed by compacting it. It is possible to increase deformation properties of sand or gravel by compacting them. However, for clay soils deformation properties may increase if they are compacted. Differences of settlements of a building depends on the different deformation properties of the artificially placed and compacted soils beneath the foundations. Different values of stiffness modulus are used for the structural design of the buildings which are constru

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E, Farahani. "Increasing Soil Organic Carbon (SOC) Content through Tillage Systems Management to Improve Soil Structure." Open Access Journal of Agricultural Research 9, no. 4 (2024): 1–3. https://doi.org/10.23880/oajar-16000372.

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Organic carbon loss from agricultural soils is one of the biggest environmental problems and challenges on a global scale which is considered in the United Nations Environment Program. Managing soil organic carbon (SOC) through optimized agricultural practices is a strategy to improve soil ecosystem services and it has an essential role in enhancing soil functions. Increasing the SOC storage level not only affects the atmospheric carbon content but it also ameliorates the soil physical, chemical, and biological functions and properties

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Ashokan, Akhila, Mini V., and Rani B. "Humic Acid as an Organic Biosurfactant in Amelioration of Physical Constraints of Sandy Soils." International Journal of Plant & Soil Science 36, no. 8 (2024): 671–81. http://dx.doi.org/10.9734/ijpss/2024/v36i84897.

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Soil productivity is often attributed to soil structure, as fertile soil with ideal soil structure and adequate moisture level is considered productive. Soil structure is a key factor that influences the movement and retention of water in the soil, the pattern of soil erosion, the formation of crusts, nutrient recycling, root penetration, and the productivity of crops. The present study aims to assess the biosurfactant property of humic acid (HA) in weakly structured sandy soil. An incubation study was carried out by soil application of different doses of HA viz;0, 2.5, 5, 10 and 15 kg ha-1 fo

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Pires, Luiz F., Klaus Reichardt, Miguel Cooper, Fabio A. M. Cássaro, Nivea M. P. Dias, and Osny O. S. Bacchi. "Pore system changes of damaged Brazilian oxisols and nitosols induced by wet-dry cycles as seen in 2-D micromorphologic image analysis." Anais da Academia Brasileira de Ciências 81, no. 1 (2009): 151–61. http://dx.doi.org/10.1590/s0001-37652009000100016.

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Soil pore structure characterization using 2-D image analysis constitutes a simple method to obtain essential information related to soil porosity and pore size distribution (PSD). Such information is important to infer on soil quality, which is related to soil structure and transport processes inside the soil. Most of the time soils are submitted to wetting and drying cycles (W-D), which can cause important changes in soils with damaged structures. This report uses 2-D image analysis to evaluate possible modifications induced by W-D cycles on the structure of damaged soil samples. Samples of

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Cacciola, Pierfrancesco, Maria Garcia Espinosa, and Alessandro Tombari. "Vibration control of piled-structures through structure-soil-structure-interaction." Soil Dynamics and Earthquake Engineering 77 (October 2015): 47–57. http://dx.doi.org/10.1016/j.soildyn.2015.04.006.

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Roy, Christine, Said Bolourchi, and Daniel Eggers. "Significance of structure–soil–structure interaction for closely spaced structures." Nuclear Engineering and Design 295 (December 2015): 680–87. http://dx.doi.org/10.1016/j.nucengdes.2015.07.067.

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Rayhani, Mohammad H. T., and M. Hesham El Naggar. "Seismic response of sands in centrifuge tests." Canadian Geotechnical Journal 45, no. 4 (2008): 470–83. http://dx.doi.org/10.1139/t07-097.

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Seismic site response of sandy soils and seismic soil–structure interaction are investigated using an electrohydraulic earthquake simulator mounted on a centrifuge container at an 80g field. The results of testing uniform and layered loose to medium-dense sand models subjected to 13 simulated earthquakes on the centrifuge are presented. The variation of shear modulus and damping ratio with shear strain amplitude and confining pressure was evaluated and their effects on site response were assessed. The evaluated shear modulus and damping ratio agreed reasonably with laboratory tests and empiric

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Hatano, Ryusuke, Ikabongo Mukumbuta, and Mariko Shimizu. "Soil Health Intensification through Strengthening Soil Structure Improves Soil Carbon Sequestration." Agriculture 14, no. 8 (2024): 1290. http://dx.doi.org/10.3390/agriculture14081290.

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Intensifying soil health means managing soils to enable sustainable crop production and improved environmental impact. This paper discusses soil health intensification by reviewing studies on the relationship between soil structure, soil organic matter (SOM), and ecosystem carbon budget. SOM is strongly involved in the development of soil structure, nutrient and water supply power, and acid buffering power, and is the most fundamental parameter for testing soil health. At the same time, SOM can be both a source and a sink for atmospheric carbon. A comparison of the ratio of soil organic carbon

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Rasulov, Khayat. "Conditions of soils dilution of dams under seismic impacts." E3S Web of Conferences 264 (2021): 03047. http://dx.doi.org/10.1051/e3sconf/202126403047.

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This report presents the results of the author's research on the dilution of water-saturated cohesive soils in the conditions of concussions. The nature of the weakening of the soil connectivity during vibration and the dynamic pressure that occurs in the thickness during the compaction of the disturbed soil structures, which contribute to the liquefaction and spreading of the soil from the body of the structure, is described. The criterion of the possibility of violation of the soil structure in the conditions of concussions is given. A theoretical method for determining this important indica

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Cresswell, HP, DE Smiles, and J. Williams. "Soil structure, soil hydraulic properties and the soil water balance." Soil Research 30, no. 3 (1992): 265. http://dx.doi.org/10.1071/sr9920265.

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We review the influence of soil structural change on the fundamental soil hydraulic properties (unsaturated hydraulic conductivity and the soil moisture characteristic) and utilize deterministic modelling to assess subsequent effects on the soil water balance. Soil structure is reflected in the 0 to -100 kPa matric potential section of the soil moisture characteristic with marked changes often occurring in light to medium textured soils' (sands, sandy-loam, loams and clay-loams). The effect of long-term tillage on soil structure may decrease hydraulic conductivity within this matric potential

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Gümüş, İ., and C. Şeker. "Influence of humic acid applications on soil physicochemical properties." Solid Earth Discussions 7, no. 3 (2015): 2481–500. http://dx.doi.org/10.5194/sed-7-2481-2015.

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Abstract. Soil structure is often said to be the key to soil productivity since a fertile soil, with desirable soil structure and adequate moisture supply, constitutes a productive soil. Soil structure influences soil water movement and retention, erosion, crusting, nutrient recycling, root penetration and crop yield. The objective of this work is to study, humic acid (HA) application on some physical and chemical properties in weak structured soils investigated. The approach involved establishing a plot experiment in the laboratory conditions. Different rates of HA (control, 0.5, 1, 2 and 4 %

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