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Journal articles on the topic 'Soil water characteristic curve (SWCC)'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Fredlund, Delwyn G., Daichao Sheng, and Jidong Zhao. "Estimation of soil suction from the soil-water characteristic curve." Canadian Geotechnical Journal 48, no. 2 (2011): 186–98. http://dx.doi.org/10.1139/t10-060.

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Soil-water characteristic curves (SWCCs) are routinely used for the estimation of unsaturated soil property functions (e.g., permeability functions, water storage functions, shear strength functions, and thermal property functions). This paper examines the possibility of using the SWCC for the estimation of in situ soil suction. The paper focuses on the limitations of estimating soil suctions from the SWCC and also suggests a context under which soil suction estimations should be used. The potential range of estimated suction values is known to be large because of hysteresis between drying and

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2

Li, J. H., L. M. Zhang, and X. Li. "Soil-water characteristic curve and permeability function for unsaturated cracked soil." Canadian Geotechnical Journal 48, no. 7 (2011): 1010–31. http://dx.doi.org/10.1139/t11-027.

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Cracks are widely present in natural and engineered soils. As water infiltration into a cracked soil often starts from unsaturated conditions, the soil-water characteristic curve (SWCC) and permeability function for the cracked soil are required when conducting seepage analysis. This paper presents a method to predict the SWCC and permeability function for cracked soil considering crack volume changes during drying–wetting processes. The cracked soil is viewed as an overlapping continuum of a crack network system and a soil matrix system. The pore-size distributions for the two pore systems at

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3

Thu, Trinh Minh, Harianto Rahardjo, and Eng-Choon Leong. "Soil-water characteristic curve and consolidation behavior for a compacted silt." Canadian Geotechnical Journal 44, no. 3 (2007): 266–75. http://dx.doi.org/10.1139/t06-114.

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Measurement of the soil-water characteristic curve (SWCC) in the laboratory is commonly conducted under zero confining pressure. However, in the field, the soil is under a confining stress. Therefore, it is important to study the effects of the confining stress on SWCC. In addition, the consolidation curve is normally generated under saturated conditions. However, the soil above the water table is usually unsaturated. Hence, it is also necessary to investigate the effects of matric suction on the characteristics of the consolidation curves. This paper presents the SWCCs under different net con

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4

Yang, Hong, Harianto Rahardjo, Eng-Choon Leong, and D. G. Fredlund. "Factors affecting drying and wetting soil-water characteristic curves of sandy soils." Canadian Geotechnical Journal 41, no. 5 (2004): 908–20. http://dx.doi.org/10.1139/t04-042.

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Drying and wetting soil-water characteristic curves (SWCCs) for five sandy soils are investigated using a Tempe pressure cell and capillary rise open tube. The test data are fitted to two SWCC equations using a least-squares algorithm. The obtained fitting parameters and some hysteretic behaviour are discussed and correlated with grain-size distribution parameters. A concept of total hysteresis is proposed to quantify the hysteresis of SWCC. The measured SWCC for one soil is also compared with the SWCC estimated from its grain-size distribution. The SWCC was also obtained at a high dry density

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5

Satyanaga, Alfrendo, Jong Kim, Sung-Woo Moon, and Martin Wijaya. "Exponential Functions for Modelling Hysteresis of Soil-Water Characteristic Curves." E3S Web of Conferences 195 (2020): 02002. http://dx.doi.org/10.1051/e3sconf/202019502002.

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Soil – water characteristic curve (SWCC) is an important property of unsaturated soils that can be used to estimate various parameters to describe unsaturated soil behavior. SWCC is reported to be hysteretic because the water content at a given suction in the wetting process is less than that in the drying process. In order to simulate the hysteretic characteristics of SWCC, many models have been proposed by different researchers. However, majority of the existing models are complex and their parameters are not related to the physical significances of SWCC variables. In this study, the new equ

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6

Abbaszadeh, Mohammad M., and Sandra L. Houston. "Influence of Soil Cracking on the Soil-Water Characteristic Curve of Clay Soil." Soils and Rocks 38, no. 1 (2015): 49–58. http://dx.doi.org/10.28927/sr.381049.

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The hydraulic conductivity for unsaturated soil conditions is more difficult to estimate than for the saturated condition. In addition, as the soil transitions from intact to cracked, the difficulty in estimating the unsaturated hydraulic conductivity increases. One critical step in the determination of unsaturated flow hydraulic conductivity is the evaluation of the Soil-Water Characteristic Curve (SWCC). In this paper, a series of laboratory studies of direct measurements of cracked soil SWCCs is presented, including challenges associated with the control of very low suction levels associate

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7

Xu, Xu, Fu You Zhang, and Ming Gu. "Experimental Research on Soil-Water Characteristic Curve of Unsaturated Soils." Applied Mechanics and Materials 353-356 (August 2013): 554–57. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.554.

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The soil-water characteristic curve (SWCC) reflects water storage capacity, Measuring it accurately is important in engineering. This paper concluded main factors of SWCC, measured soil-water characteristic of loess under conditions of different dry densities, the curve of volume water content, saturation and matric suction were presented, the curves showed similar change trend, saturation mainly determined the matric suction when matric suction was small.

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8

Ramos-Rivera, Johnatan, Daniel Parra-Holguín, Yamile Valencia-González, and Oscar Echeverri-Ramírez. "Estimating soil-water characteristic curve based on soil type and best-fitting regressions derived from a simplified method using Aburra Valley dataset." MATEC Web of Conferences 337 (2021): 02002. http://dx.doi.org/10.1051/matecconf/202133702002.

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In unsaturated soil mechanics, many attempts have been made to estimate the SWCC based on soil texture and grain-size distribution. This paper proposes a simplified method to estimate the soil-water characteristic curve (SWCC) for both coarse and fine-grained soils using SWCC data and machine learning computer code in the Aburra Valley. Fredlund and Xing parameters has been used to estimate the SWCC correlations. Soil samples collected from field survey were subjected to laboratory testing, SWCCs were estimated using filter paper method. Each SWCC data set from Aburra Valley was fitted with Fr

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9

Syarifudin, Achmad, and Alfrendo Satyanaga. "Variability of Bimodal Soil-Water Characteristic Curves under Different Confining Pressures." Applied and Environmental Soil Science 2021 (June 5, 2021): 1–10. http://dx.doi.org/10.1155/2021/5569491.

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Soils with two subcurves of Soil-Water Characteristic Curve (SWCC) (dual porosity soils) might be found within various residual soils. Soils located in different depths have different confining pressure. Residual soils are found in the unsaturated zones due to the deep groundwater table. There is a linear correlation between the hydraulic properties of the soil in the unsaturated area and that of its unsaturated properties. This study aims to examine the influence of the confining pressure towards the SWCC of dual porosity soil. The scope of this study involves measurements of the drying and w

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10

Yang, Chunliu, Jianhua Wu, Peiyue Li, Yuanhang Wang, and Ningning Yang. "Evaluation of Soil-Water Characteristic Curves for Different Textural Soils Using Fractal Analysis." Water 15, no. 4 (2023): 772. http://dx.doi.org/10.3390/w15040772.

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The soil-water characteristic curve (SWCC) is an essential tool to determine hydraulic and mechanical properties of unsaturated soils. As an inherent influencing factor, soil texture controls the characteristics of SWCCs. Fractal theory can quantitatively describe the physical characteristics of soil. This study used particle size distribution data and water content data contained in the UNSODA2.0 database to explore the fractal characteristics of 12 soil types with different textures under different matrix suctions. The SWCC fractal model was adopted to characterize the hydraulic properties o

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11

NASCIMENTO, ÍCARO VASCONCELOS DO, THIAGO LEITE DE ALENCAR, CARLOS LEVI ANASTÁCIO DOS SANTOS, RAIMUNDO NONATO DE ASSIS JÚNIOR, and JAEDSON CLÁUDIO ANUNCIATO MOTA. "EFFECT OF SAMPLE RE-SATURATION ON SOIL-WATER CHARACTERISTIC CURVE." Revista Caatinga 31, no. 2 (2018): 446–54. http://dx.doi.org/10.1590/1983-21252018v31n221rc.

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ABSTRACT Soil-water characteristic curve (SWCC) is an important tool for water management in irrigated agriculture. However, factors such as texture and structure of soils influence SWCC behavior. According to the literature, wetting and drying cycles alter SWCC. A similar process of re-saturation and drying occurs during SWCC obtainment under laboratory conditions. Based on the hypothesis that re-saturation process alters SWCC due to clay loss in the sample, this study aimed to obtain the SWCC, S index, and pore size distribution from samples submitted to re-saturation cycles, as well as from

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12

Schafer, Haley, and Nicholas Beier. "Estimating soil-water characteristic curve from soil-freezing characteristic curve for mine waste tailings using time domain reflectometry." Canadian Geotechnical Journal 57, no. 1 (2020): 73–84. http://dx.doi.org/10.1139/cgj-2018-0145.

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The unsaturated properties of a soil are required to predict the rate of dewatering and magnitude of strength gain of a mine waste tailings deposit during desiccation dewatering. This prediction requires the soil-water characteristic curve (SWCC), which is time-consuming and challenging to attain and may take anywhere from weeks to months to complete a single test. As a result, alternative methods are needed to estimate the SWCC. Past research has indicated that the soil-freezing characteristic curve (SFCC) can be used to estimate the SWCC in some soils. An experimental method and apparatus we

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13

Yan, Wei, Emanuel Birle, and Roberto Cudmani. "A simple approach for predicting soil water characteristic curve of clayey soils using pore size distribution data." MATEC Web of Conferences 337 (2021): 02012. http://dx.doi.org/10.1051/matecconf/202133702012.

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The soil water characteristic curve (SWCC) of soils can be derived from the measured pore size distribution (PSD) data by applying capillary models. This method is limited for clayey soils due to the PSD changes during SWCC testing. In this study, a suction-dependent multimodal PSD model based on probability theory is developed and used to derive SWCC. The model is validated by simulating the drying branches of SWCCs of four compacted Lias Clay samples with different initial states. A good consistency between the measured and predicted SWCC is shown.

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14

Chin, Kheng-Boon, Eng-Choon Leong, and Harianto Rahardjo. "A simplified method to estimate the soil-water characteristic curve." Canadian Geotechnical Journal 47, no. 12 (2010): 1382–400. http://dx.doi.org/10.1139/t10-033.

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This paper proposes a simplified method to estimate the soil-water characteristic curve (SWCC) for both coarse- and fine-grained soils using one-point SWCC measurement and basic index properties. Parameters of the Fredlund and Xing SWCC equation were correlated with the basic properties of 60 soils: 30 soils each of coarse- and fine-grained types. Sensitivity analysis revealed that the location of the one-point measurement at matric suctions of 10 and 500 kPa gave the most reliable SWCC using the proposed method for coarse- and fine-grained soils, respectively. The validity of the proposed met

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15

Xie, Xiao, Ping Li, Xiaokun Hou, Tonglu Li, and Guowei Zhang. "Microstructure of Compacted Loess and Its Influence on the Soil-Water Characteristic Curve." Advances in Materials Science and Engineering 2020 (January 8, 2020): 1–12. http://dx.doi.org/10.1155/2020/3402607.

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Soil-water characteristic curve (SWCC) is a key constitutive relationship for studying unsaturated soil, and as is known, microstructure of the soil has great influence on the mechanical behaviour of the soil. In this study, the wetting and drying soil-water characteristic curves (SWCCs) of loess compacted at three different water contents were measured using the filter paper method. And microproperties of compacted loess were obtained by the mercury intrusion method (MIP) and scanning electron microscope (SEM). Results show that the compaction water contents have significant influence on the

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16

Habasimbi, Paul, and Tomoyoshi Nishimura. "Comparison of Soil–Water Characteristic Curves in One-Dimensional and Isotropic Stress Conditions." Soil Systems 2, no. 3 (2018): 43. http://dx.doi.org/10.3390/soilsystems2030043.

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Understanding unsaturated soil behavior is key to the design of foundations and embankment structures. Geotechnical engineers have applied net normal stress and matric suction to these engineering problems. Water retention activity in soils is used to predict seepage problems and stability of slope failures. Soil–Water Characteristic Curve (SWCC) tests contribute largely to matric suction interpretation. Determination of SWCCs in the laboratory is usually done using a pressure plate apparatus where vertical or confining stress cannot be applied. Mathematical models of SWCC though commonly acce

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17

Peranić, Josip, Željko Arbanas, Sabatino Cuomo, and Matej Maček. "Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass." Geofluids 2018 (July 29, 2018): 1–15. http://dx.doi.org/10.1155/2018/6297819.

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Depending on the nature of the material and suction range, laboratory measurements of the soil-water characteristic curve (SWCC) can be time-consuming and expensive, especially for residual soils, in which a wide range of particle sizes and soil structures typically results in SWCCs that cover a wide range of suction. Investigations of the SWCCs of residual soil from flysch rock masses are rare, and so far, no results were presented in the literature which were obtained by performing measurements on undisturbed specimens. In this paper, a detailed examination of water retention characteristics

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18

Fredlund, Murray D., G. Ward Wilson, and Delwyn G. Fredlund. "Use of the grain-size distribution for estimation of the soil-water characteristic curve." Canadian Geotechnical Journal 39, no. 5 (2002): 1103–17. http://dx.doi.org/10.1139/t02-049.

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The implementation of unsaturated soil mechanics into engineering practice is dependent, to a large extent, upon an ability to estimate unsaturated soil property functions. The soil-water characteristic curve (SWCC), along with the saturated soil properties, has proven to provide a satisfactory basis for estimating the permeability function and shear strength functions for an unsaturated soil. The volume change functions have not been totally defined nor applied in geotechnical engineering. The objective of this paper is to present a procedure for estimating the SWCC from information on the gr

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19

Okovido, J. O., and E. O. Obroku. "Soil water characteristic curve of a compacted A-7-5 tropical red earth soil." Nigerian Journal of Technology 40, no. 3 (2021): 379–86. http://dx.doi.org/10.4314/njt.v40i3.4.

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   Soil water characteristic curve (SWCC) is a very important property of unsaturated soil and by extension tropical red earth soils. This is because several other important soils’ properties can be related to it. The Filter paper method was employed in the determination of the A-7-5(5) tropical red earth WCC. The gravimetric water content was utilized in the computation of the SWCC. Four models, Fredlund and Xing (1994), FX; Van Genuchten (1980), VG; Brooks and Corey (1964), BC; and Kosugi (1996), K were used to estimate the SWCCs of the soil and the minimum SSEnorm (MSSE),

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20

Tan, Ye, Fuchu Dai, Zhiqiang Zhao, Jian Zhou, and Wei Cheng. "Analysis of Soil–Water Characteristic Curve and Microstructure of Undisturbed Loess." Applied Sciences 14, no. 8 (2024): 3329. http://dx.doi.org/10.3390/app14083329.

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Long-term irrigation promotes the infiltration of water in the thick, stratified loess layer, significantly raising the groundwater table and triggering a series of landslides in loess platform areas. The soil–water characteristic curve (SWCC) of loess buried at different depths affects the unsaturated infiltration process and is intricately connected to the soil’s microstructure. The SWCCs, scanning electron microscope (SEMs), and pore size distributions (PSDs) for five sets of undisturbed loess samples at depths ranging from 3.4 to 51.9 m are shown in this paper. The results indicate that th

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21

Li, Xiong Wei, Yong Wang, and Xiao Shu Jiang. "Predicting Reservoir Pressure with Soil-Water Characteristic Curve." Advanced Materials Research 1073-1076 (December 2014): 2215–18. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.2215.

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Experiment study on shallow gassy unsaturated sand under different confining pressure with GDS triaxial system's 4D stress path module is carried out. Different SWCC shapes under different confining pressures are analyzed. The results show that unsaturated sand's water retention capacity declines gradually with confining pressure infliction and accretion. Finally, shallow gassy sand's gas reservoir pressure characteristics with SWCC are analyzed and forecast, and it's conservative if the same thing is done based on SWCC without confining pressure.

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22

Fang, Xiang Wei, Shu Ping Jiang, Chun Ni Shen, Yun Xie, and Gang Li. "Influences of Deviatoric Stress on the Soil-Water Characteristic Curve." Advanced Materials Research 243-249 (May 2011): 2456–59. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2456.

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The soil-water characteristic curve (SWCC) is one of the major research subjects in unsaturated soil mechanics. To study the influence of deviatoric stress on the SWCC of an unsaturated soil, a series of triaxial drained shear tests by controlling constant net mean stress and suction were conducted. It was found that the SWCC was dependent on deviatoric stress. A unified SWCC equation was proposed including not only water content and suction, but also net mean stress and deviatoric stress.

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23

Wang, Shijun, Xing Guo, Feng You, et al. "Estimation of the Soil–Water Characteristic Curve from Index Properties for Sandy Soil in China." Water 16, no. 14 (2024): 2044. http://dx.doi.org/10.3390/w16142044.

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The soil–water characteristic curve (SWCC) is an important parameter of unsaturated soil, and almost all the engineering characteristics of unsaturated soil are more or less related to the SWCC. The SWCC contains important information for geotechnical engineering, water engineering, hydrogeology modelling and climate modelling. It is noted that the experimental measurement of SWCC is costly and time consuming, which limits the implementation of principles of unsaturated soil mechanics in practical engineering. The indirect method, which estimates the SWCC from the index properties of soil, can

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24

Yang, Yu You, Qin Xi Zhang, Gui He Wang, and Chen Liu. "Study on the Test of Soil Water Characteristic Curve." Advanced Materials Research 261-263 (May 2011): 1094–98. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1094.

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The test of soil water characteristic curve (SWCC) and its mathematic model are present. The SWCC can describe the relationship between unsaturated soil matric suction and water content. Matric suction is an important parameter to address when studying the engineering properties of unsaturated soil. And while the measurement of substrate attraction is a very difficult issue, it is also one of the biggest obstacles in the engineering applications of unsaturated soil. By analyzing and researching the test data of SWCC researchers can initially establish the mathematic model which is the SWCC equ

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25

Chi, Chunming, Changwei Zhao, and Jinhu Zhi. "A Novel Three-Segment Model to Describe the Entire Soil–Water Characteristic Curve." Agronomy 14, no. 4 (2024): 707. http://dx.doi.org/10.3390/agronomy14040707.

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This study aims to accurately describe the soil–water characteristic curve (SWCC) across the full range from saturation to oven dryness. We propose a smooth, continuous three-segmented SWCC model that divides the saturation range into wet, air-dried, and oven-dried segments. The two model junction points are anchored at matric suctions of 104.5 and 106.5 cm, respectively. The soil water content at 104.5 cm represents the maximum soil hygroscopy, reflecting the maximum water content in air-dried soil, while the soil water content at 106.5 cm characterizes the minimum soil water content. This im

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26

Zhang, Junhui, Junhui Peng, Yejuan Chen, Jue Li, and Feng Li. "Estimation of Soil-Water Characteristic Curve for Cohesive Soils with Methylene Blue Value." Advances in Civil Engineering 2018 (July 5, 2018): 1–7. http://dx.doi.org/10.1155/2018/9213674.

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This study described a new methylene blue test to measure the methylene blue value (MBV) for 15 cohesive soils and established the relationship between MBV and plasticity index (PI) and between MBV and percent passing No. 200 sieve (P200), respectively. Thereafter, the soil-water characteristic curves (SWCCs) for 15 cohesive soils based on Fredlund and Xing’s model were generated by the pressure plate test. Then, regression equations for determining the four fitting parameters in a previously developed SWCC equation by using the measured MBV were utilized to generate the SWCC for the cohesive

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27

Alowaisy, Adel, Noriyuki Yasufuku, Ryohei Ishikura, Masanori Hatakeyama, and Shuu Kyono. "Novel rapid measurement system of undisturbed soils water characteristics curve utilizing the continuous pressurization method." E3S Web of Conferences 92 (2019): 07008. http://dx.doi.org/10.1051/e3sconf/20199207008.

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Through this paper, a sampling methodology and a novel full automatic system adopting the continuous pressurization method which is capable of determining the Soil Water Characteristics Curve (SWCC) for both remoulded and undisturbed samples in a very short time were developed. The proposed system was validated by comparing the SWCCs of standard testing soils obtained using the developed system to the SWCCs obtained using a conventional method. Remoulded and undisturbed natural soil samples were tested, where the degree of disturbance influence on the obtained SWCC was discussed. In addition,

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Matlan, Siti Jahara, Muhammad Mukhlisin, and Mohd Raihan Taha. "Performance Evaluation of Four-Parameter Models of the Soil-Water Characteristic Curve." Scientific World Journal 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/569851.

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Soil-water characteristic curves (SWCCs) are important in terms of groundwater recharge, agriculture, and soil chemistry. These relationships are also of considerable value in geotechnical and geoenvironmental engineering. Their measurement, however, is difficult, expensive, and time-consuming. Many empirical models have been developed to describe the SWCC. Statistical assessment of soil-water characteristic curve models found that exponential-based model equations were the most difficult to fit and generally provided the poorest fit to the soil-water characteristic data. In this paper, an exp

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Zainal, Abdul-Kareem Esmat, and Shaimaa Hasan Fadhil. "Prediction of soil water characteristic curve using artificial neural network: a new approach." MATEC Web of Conferences 162 (2018): 01014. http://dx.doi.org/10.1051/matecconf/201816201014.

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Soil-Water Characteristic Curve (SWCC) is an important relationship between matric suction and volumetric water content of soils especially when dealing with unsaturated soil problems, these problems may include seepage, bearing capacity, volume change, etc. where the matric or total suction may have a considerable effect on unsaturated soil properties. Obtaining an accurate SWCC for a soil could be cumbersome and sometimes it is time consuming and needs effort for some soils, either through laboratory tests or through field tests. Accurate prediction of this curve can give more precise expect

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Angelaki, Anastasia, Vasiliki Bota, and Iraklis Chalkidis. "Estimation of Hydraulic Parameters from the Soil Water Characteristic Curve." Sustainability 15, no. 8 (2023): 6714. http://dx.doi.org/10.3390/su15086714.

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Soil water characteristic curve (SWCC) is one of the most essential hydraulic properties that play fundamental role in various environmental issues and water management. SWCC gives important information for water movement, soil behavior, infiltration, and drainage mechanism, affecting the water circle and the aquifer recharge. Since most of the world’s freshwater withdrawals go for irrigation uses, decoding SWCC is beneficial, as it affects water saving through irrigation planning. Estimation of crucial parameters, such as field capacity (FC) and permanent wilting point (PWP) is the key soluti

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V A Alexander, Damian, Kyung Ho Park, and Derek Anthony Gay. "An estimation of the soil water characteristics curves of Trinidad's expansive clays." E3S Web of Conferences 195 (2020): 03009. http://dx.doi.org/10.1051/e3sconf/202019503009.

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Volume change behaviour of expansive clays has been one of the leading causes of damage to civil infrastructures worldwide. Contributing factors that lead to failures relate to changes in water content within the soil. Variations of water content can vary significantly based on an area’s climate regime. Trinidad has two seasons, the dry season (January to June) and the wet season (July to December). This variation leads to volume changes of expansive clay, where they exist mainly within the central and south regions of Trinidad. These areas are densely populated by residential and commercial b

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Wang, You Le, Dong Fang Tian, Gai Qing Dai, Yao Ruan, and Lang Tian. "A Soil Water Characteristic Curve Model Considering Urea Concentration." Advanced Materials Research 798-799 (September 2013): 157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.157.

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A new soil water characteristic curve (SWCC) model considering urea concentration is presented in the paper. Two assumptions are used to obtain the model. One is SWCC which could be described by exponential functions in the experiments. Another is relationship between the parameters of exponential functions and urea concentration which is linear based on experimental data. In the research, we have carried out some experiments of SWCC and obtained some valuable data which could affect urea concentration. By using linear fitting, an exponential function between water content and suction and urea

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Wang, Lin, Wengang Zhang, and Fuyong Chen. "Bayesian Approach for Predicting Soil-Water Characteristic Curve from Particle-Size Distribution Data." Energies 12, no. 15 (2019): 2992. http://dx.doi.org/10.3390/en12152992.

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Soil-water characteristic curve (SWCC) is a significant prerequisite for slope stability analysis involving unsaturated soils. However, it is difficult to measure an entire SWCC over a wide suction range using in-situ or laboratory tests. As an alternative, the Arya and Paris (AP) model provides a feasible way to predict SWCC from the routinely available particle-size distribution (PSD) data by introducing a scaling parameter. The accuracy of AP model is generally dependent on the calibrated database which contains test data collected from other sites. How to use the available test data to det

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34

Guo-Quan, Ding, Bian Xia, Yuan Jun-Ping, and Zhu Jun-Gao. "Bimodal SWCC and Bimodal PSD of Soils with Dual-Porosity Structure." Mathematical Problems in Engineering 2022 (June 24, 2022): 1–10. http://dx.doi.org/10.1155/2022/4052956.

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The soil–water characteristic curve (SWCC) and pore-size distribution (PSD) are fundamental characteristics of soils that determine many physical and mechanical properties. Recent studies demonstrate that both SWCC and PSD sometimes exhibit a bimodal feature. In this paper, soils with bimodal SWCCs are mainly divided into three categories: gap-graded soils, compacted clayey soils, and natural dual-porosity structural soils, from the perspective of microporosity structure. Based on the Fredlund and Xing unimodal SWCC equation, a bimodal SWCC equation is presented. The bimodal PSD equation d v /

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35

Chen, Xinran, Minglei Ma, Shumei Zhou, Mingjun Hu, Kejie Zhai, and Sen Wei. "Effect of Initial Conditions on the Pore Structure and Bimodal Soil–Water Characteristic Curve of Compacted Granite Residual Soil." Processes 12, no. 2 (2024): 409. http://dx.doi.org/10.3390/pr12020409.

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Granite residual soil typically forms complex pore structures and exhibits high water sensitivity due to physical and chemical weathering processes. Changes in initial compaction conditions significantly affect the mechanical and hydraulic properties of in situ granite residual soil subgrades, with these variations fundamentally related to changes in pore structure and soil–water characteristics. This study investigates the pore structure and bimodal soil–water characteristic curve (SWCC) of a compacted granite residual soil through laboratory tests and mercury intrusion porosimetry tests. Nin

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36

Oh, Won-Taek, and Mahsa Bajestani. "Effect of Soil-Water Characteristic Curve on the Stability of Unsupported Vertical Trenches in Unsaturated Soils." E3S Web of Conferences 382 (2023): 13002. http://dx.doi.org/10.1051/e3sconf/202338213002.

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In geotechnical engineering practice, unsupported vertical trenches are typically excavated in unsaturated soils. In this case, the variation of shear strength and hydraulic conductivity with respect to soil suction is key information to analyze the stability of an unsupported vertical trench. Most shear strength and hydraulic conductivity models use the soil-water characteristic curve (SWCC) as a main tool. Various models are available to determine SWCC, shear strength, and hydraulic conductivity for unsaturated soils. Scholars or practitioners use one the existing models in numerical analyse

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Yang, Yu You, Qin Xi Zhang, Gui He Wang, and Jia Xing Yu. "Soil Water Characteristic Curve and its Applications in Tunnel." Advanced Materials Research 261-263 (May 2011): 1039–43. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1039.

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A soil water characteristic curve (SWCC) can describe the relationship between unsaturated soil matric suction and water content. By analyzing and researching the test data of the soil water characteristic curve researchers can initially establish the SWCC equation and apply this equation to the actual engineering analysis. In another words, this article is based on the fluid-solid coupling theory of unsaturated soil used to analyze and study the problem of land subsidence caused by tunnel construction. Numerical calculations show that the coupling results agree well with the measured curve wo

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Zhou, Jie, Junjie Ren, and Zeyao Li. "An Improved Prediction Method of Soil-Water Characteristic Curve by Geometrical Derivation and Empirical Equation." Mathematical Problems in Engineering 2021 (June 17, 2021): 1–22. http://dx.doi.org/10.1155/2021/9956824.

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Much attention has been paid on the soil-water characteristic curve (SWCC) during decades because it plays great roles in unsaturated soil mechanics. However, it is time-consuming and costly to obtain a series of entire saturation-suction data by experiments. The curves acquired by directly fitting empirical equations to limited experimental data are greatly different from the actual SWCC, and the relevant soil parameters obtained by inaccurate curve are also incorrect. Thus, an improved prediction method for more accurate entire SWCC was established. This novel method was based on the analysi

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Yi, Fa Cheng, Zhe Wang, and Min Juan Zhou. "Research on the Soil Water Characteristic Curve and Prediction of Compacted Bentonite." Advanced Materials Research 518-523 (May 2012): 2785–91. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2785.

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In this paper, the soil water characteristic curve (SWCC)of Xinjiang Altay bentonite under different stress states, different initial dry density and different initial water content has been tested by dialysis method and vapor phase method, and the impact of the various factors on the water retention characteristics of Xinjiang Altay bentonite has been analyzed comprehensively. The mercury intrusion porosimetry (MIP) test has been carried out on the soil sample, and then the SWCC is predicted by the Pore size distribution(PSD)curve which is got from the MIP test. Finally, the predicted SWCC is

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Castro, Cíntia, Anderson Soares, and Marcos Aguiar. "Soil-water characteristic curve of polypropylene fibrereinforced sandy soil." Soils and Rocks 45, no. 3 (2022): 1–9. http://dx.doi.org/10.28927/sr.2022.070021.

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Fibre reinforcement is considered a good alternative for improving the geotechnical properties of soil. However, studies that investigate its behaviour, accounting for the unsaturated condition, and the hydraulic behaviour of soil mixtures with fibre, are limited. Therefore, the current study evaluates the impact of the inclusion of polypropylene fibres on the hydraulic behaviour of soil through geotechnical characterisation, scanning electron microscopy (SEM), macroporosity and microporosity tests, and filter paper tests. The soil-water characteristic curve (SWCC) of different mixtures of fib

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Lizana Olarte, Diego Edson Meliton, Zenón Aguilar-Bardales, and Diana Lucia Calderón-Cahuana. "Estimación de la curva característica suelo agua en suelos arenosos mediante el ensayo de papel filtro." TECNIA 33, no. 1 (2023): 52–60. http://dx.doi.org/10.21754/tecnia.v33i1.1397.

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The unsaturated soils mechanics is strongly related to the suction phenomenon that occurs between solid soil particles, which changes when the soil water content does not remain constant. The soil-water characteristic curve (SWCC) provides information related to suction and water content of the soil; and to obtain such a curve different direct and indirect methods can be used. In this research the soil-water characteristic curve for sands is obtained through the implementation of the filter paper test. For this purpose, three reconstituted samples of sandy soils from Lima – Peru (relative dens

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Thu, Trinh Minh, Harianto Rahardjo, and Eng-Choon Leong. "Elastoplastic model for unsaturated soil with incorporation of the soil-water characteristic curve." Canadian Geotechnical Journal 44, no. 1 (2007): 67–77. http://dx.doi.org/10.1139/t06-091.

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An elastoplastic model is proposed in this paper that incorporates the soil-water characteristic curve (SWCC) for obtaining soil parameters of unsaturated soil. The SWCC is shown to govern the rate of change in the soil parameters for the elastoplastic model with respect to matric suction. A series of isotropic consolidation tests under different matric suctions and tests for obtaining SWCC were carried out on statically compacted kaolin specimens. Nanyang Technological University (NTU) mini suction probes were installed along the height of the specimen to measure pore-water pressures during i

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Daramola, Abdulroqeeb Mofeyisope, Alfrendo Satyanaga, Babatunde David Adejumo, Yongmin Kim, Zhai Qian, and Jong Kim. "Real-Time Scanning Curve of Soil–Water Characteristic Curve for Sustainability of Residual Soil Slopes." Sustainability 17, no. 5 (2025): 1803. https://doi.org/10.3390/su17051803.

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The scanning curve of the soil–water characteristic curve (SWCC) represents the intermediate paths followed by soil as it transitions between the initial drying and main wetting cycles. The alternating occurrence of climatic conditions, such as rainfall and evaporation in different regions globally, provides a valuable framework for understanding how these dynamics influence the scanning curve. Monitoring the scanning curve can provide valuable insights for managing water resources and mitigating the impacts of drought, contributing to environmental sustainability by enabling more precise agri

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Kocaman, Kadir, Askin Ozocak, Tuncer B. Edil, et al. "Evaluation of Soil-Water Characteristic Curve and Pore-Size Distribution of Fine-Grained Soils." Water 14, no. 21 (2022): 3445. http://dx.doi.org/10.3390/w14213445.

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A soil’s physical properties, mineral types, and pore structure significantly influence the shape and properties of the soil-water characteristic curve (SWCC). This study investigated the effects of the soil’s physical properties and mineral types on the SWCC and pore-size distribution (PSD). Eight different soils from an alluvial deposit in Istanbul and Adapazarı/Türkiye were used in the study. The test samples were prepared by compaction at optimum water content (OWC) and wet side of optimum water content (wet of OWC). The samples were prepared by consolidation from the slurry. The PSDs of t

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Dafalla, M. A., A. M. Al-Mahbashi, A. Almajed, and M. Al-Shamrani. "Predicting Soil-Water Characteristic Curves of Clayey Sand Soils Using Area Computation." Mathematical Problems in Engineering 2020 (June 3, 2020): 1–9. http://dx.doi.org/10.1155/2020/4548912.

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The soil-water characteristic curves (SWCCs) for soils are important for geotechnical engineers in the prediction of clay behavior in case of partially saturated conditions. In the wastewater and waste containment industry, variable clay content is considered. It is not practical to run a time-consuming test several times to obtain the soil-water characteristic curves for every proportion. This study is aimed at introducing a practical procedure to predict the response of clay of known mineralogy and geological setting when clay content within a liner is variable. Fitting curves were performed

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Han, Zhong, Sai K. Vanapalli, and Wei-lie Zou. "Integrated approaches for predicting soil-water characteristic curve and resilient modulus of compacted fine-grained subgrade soils." Canadian Geotechnical Journal 54, no. 5 (2017): 646–63. http://dx.doi.org/10.1139/cgj-2016-0349.

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This paper combines a series of approaches for predicting the soil-water characteristic curve (SWCC) and the variation of the resilient modulus (MR) of compacted fine-grained subgrade soils with moisture content, which is the key information required in mechanistic pavement design methods. The presented approaches for the SWCC and MR are integrated, as (i) they are developed following the same philosophy, (ii) they require only the measurements of the suction and moisture content or MR at saturated and optimum moisture content conditions for prediction, and (iii) the predicted SWCC is used for

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Zhang, Yuwei, Zhanping Song, Xiaolin Weng, and Yongli Xie. "A New Soil-Water Characteristic Curve Model for Unsaturated Loess Based on Wetting-Induced Pore Deformation." Geofluids 2019 (April 15, 2019): 1–14. http://dx.doi.org/10.1155/2019/1672418.

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The soil-water characteristic curve (SWCC) is the basis for describing seepage, strength, and constitutive model of unsaturated soil. The existing SWCC models do not work accurately for evaluating loess, because they do not consider the pore deformation that is induced by wetting. The present study develops a new SWCC model for unsaturated loess. The model considers the effect of wetting-induced pore deformation (WIPD) on the SWCC. The new model includes 6 parameters, which could be confirmed by laboratory tests. The pore volume function (PVF) was described by the WIPD. The shift factor ξ1i an

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Ahmed, Asif, Md Jobair Bin Alam, Pratibha Pandey, and MD Sahadat Hossain. "Estimation of unsaturated flow parameters and hysteresis curve from field instrumentation." MATEC Web of Conferences 337 (2021): 01008. http://dx.doi.org/10.1051/matecconf/202133701008.

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Abstract: The negative pore water pressure or soil suction has significant effect on the performance of geotechnical infrastructures (e.g., slope, pavement, embankment etc.). The unsaturated behavior of soil is not static, rather offers variation in response to climatic loading. The objective of the study was to evaluate field-based techniques of SWCC construction in terms of capturing these variation as compared to laboratory methods and predictive models. The field assessment could allow the quantification of hysteresis effect on the SWCC. Instrumentation data from one Texas, USA highway was

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Feng, Jun, and Guangze Zhang. "Study on Soil Water and Suction Stress Characteristics for Unsaturated Clay Soil of Airport Engineering Based on Laboratory Tests." Geofluids 2021 (July 22, 2021): 1–8. http://dx.doi.org/10.1155/2021/5233045.

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For the unsaturated soil in Feidong China, this study examined the suction stress characteristics based on the soil-water characteristic curve (SWCC), which was different from traditional research ideas. At the same time, the unsaturated consolidation device was adopted for SWCC tests, with consideration of the influence of yielding stress of soil, which was different from the traditional test approach of the soil-water characteristic curve. The results were estimated using the van Genuchten model, which was revealed that this is well-fit for the studied unsaturated soil, and the triaxial shea

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Bello, Nura, Alfrendo Satyanaga, Nurly Gofar, and Jong Kim. "Estimation of bimodal soil-water characteristics curve under wetting process." PLOS One 20, no. 6 (2025): e0325646. https://doi.org/10.1371/journal.pone.0325646.

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Soil-water characteristics curve (SWCC) is hysteretic. The hysteretic curves represent the soil conditions during drying and wetting processes. Almost all failure of geotechnical structures, particularly in soils with dual porosity (bimodal soils) occurs during soil wetting, making the wetting curve more relevant to geotechnical applications than the drying curve. Still, due to the high-cost implications, time require, and difficulties associated with measuring SWCC under wetting process, the wetting curve has been continuously neglected. This leads to analyses that do not reflect the actual s

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