Article
Computer Science, Interdisciplinary Applications
Leonardo Maria Lalicata, Agostino Walter Bruno, Domenico Gallipoli
Summary: This paper presents an analytical method that predicts the horizontal capacity of piles in unsaturated soils. The method extends the Broms approach to account for the combined effect of the groundwater table and the apparent cohesion of the unsaturated soil. It calculates the maximum horizontal force and bending moment sustained by the pile for different head fixities, considering non-dimensional parameters related to the pile's geometry, flexural resistance, soil resistance, and failure mechanism. The proposed method accurately predicts the lateral capacity of piles, emphasizing the importance of considering the partially saturated state of the soil.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Environmental Sciences
Behzad Ghanbarian, Brandon A. Yokeley
Summary: Grouping soils based on similarities in their textural, taxonomic, and/or structural properties has broad applications to pedology, hydrology, and soil science. In this study, a new approach for classifying soils using hydraulic conductivity data was presented, and eight different soil classes were identified within the studied data set by calculating critical pore sizes and grouping soils with similar characteristics.
WATER RESOURCES RESEARCH
(2021)
Article
Engineering, Civil
Xi Xiong, Yonglin Xiong, Feng Zhang
Summary: The study successfully simulated the hydraulic/mechanical behavior of unsaturated Masado by introducing the superloading concept and the proposed WRC model, confirming the accuracy of the model.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Arash Azizi, Ashutosh Kumar, David Geoffrey Toll
Summary: This paper discusses the cyclic and water retention response of a clayey sand subjected to repetitive cyclic loading and wetting stages. The results show that the accumulated permanent strains and resilient modulus of the tested soil are dependent on the suction level while the main wetting water retention curve of the soil dictates the variation of the suction measured during cyclic loading and wetting. A void ratio dependent water retention model is developed accounting for the observed bounding effect and employed to predict the measured suction during repetitive cyclic loading and wetting. The suction values predicted by the void ratio dependent water retention model are in good agreement with the experimental data. The results imply that predictive frameworks proposed for the cyclic behaviour of road and railway formation layers require water retention counterparts that incorporate the bounding effect of void ratio on soil water retention curves.
Article
Computer Science, Interdisciplinary Applications
Zhiqiang Lin, Jiangu Qian, Zhenhao Shi
Summary: This study introduces a novel model to estimate the shear strength of expansive soils. Experimental results show a linear relationship between capillary suction stress and shear strength, but the friction angle contributed to shear strength is different from the internal friction angle of saturated soils.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Suman Roy, Sathiyamoorthy Rajesh
Summary: In this study, a novel tensile strength framework is proposed to determine the tensile strength characteristic curve (TSCC) of both coarse- and fine-grained soils over the entire saturation range. The variation of the parameters for the TSCC model for different types of soils, testing methods, and sample preparation methodologies is critically assessed. The proposed framework is validated with experimental data sets for both coarse- and fine-grained soils, showing good agreement in most cases.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Soil Science
You Gao, Ze Li, De'an Sun, Haihao Yu
Summary: Reliable estimation of unsaturated soil hydraulic properties is crucial for various research and engineering projects. The study evaluated hydraulic hysteresis and permeability of unsaturated soil with different void ratios or bulk densities. Results showed that the proposed hysteresis model effectively describes the drying, wetting, and scanning curves at different void ratios, and the permeability model predicts the relative permeability coefficient accurately.
SOIL & TILLAGE RESEARCH
(2021)
Article
Engineering, Geological
Sannith Kumar Thota, Toan Duc Cao, Farshid Vahedifard
Summary: The paper introduces the concept of Poisson's ratio characteristic curve (PRCC) to establish the relationship between Poisson's ratio and degree of saturation. Through calibration and validation, the proposed model can accurately predict the behavior of soils, leading to more accurate assessments in geotechnical engineering applications.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Civil
Gianluca Bella
Summary: The research explores the hydraulic behavior of tailings in unsaturated conditions, finding that denser tailings exhibit better water retention capability, and increasing fine content also improves water retention capability. Additionally, different preparation methods have a significant impact on the hydro-mechanical response of tailings.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Zhiqiang Lin, Jiangu Qian, Zhenhao Shi, Qian Zhai
Summary: This study examines the uniqueness of strength parameters for coarse- and fine-grained unsaturated soils with bimodal soil-water retention curves (SWRCs) using the suction stress concept. The results show that both types of soils exhibit a bilinear strength envelope in the suction stress-shear strength plane, which differs from unsaturated soils with unimodal SWRC.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Civil
Wentao He, Tatsuya Ishikawa, Binh T. Nguyen
Summary: The use of vegetation to prevent slope failure and erosion has become increasingly important. Experimental results show that both grass root and matric suction enhance soil shear strength, and the strength increases with grass age or matric suction. In addition, older grass age leads to higher water retention capacity and volumetric water content under the same matric suction conditions. Furthermore, a proposed calculation equation based on Vanapalli model accurately reflects the increase in the unsaturated mechanical properties of grassed soil.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Chemistry, Multidisciplinary
Xiaohua Bao, Zhizao Bao, Lijuan Li, Yingpeng Li, Peng Peng, Xiangsheng Chen
Summary: This study investigates the unsaturated mechanical properties and water-retention characteristics of fibre-reinforced soil, and proposes a model for the soil-water characteristic curve that accurately describes fibre-reinforced soil.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Behrooz Daneshian, Ghassem Habibagahi, Ehsan Nikooee
Summary: Hydraulic conductivity of unsaturated soils is crucial for modeling various phenomena, and is influenced by factors such as soil water content and pore connectivity. Current predictive models do not adequately consider pore connectivity, while pore network models offer a more realistic portrayal of soil characteristics.
Article
Ecology
M. Zavala, H. Saucedo, V Castanedo
Summary: Soil hydraulic characterization is crucial for studying water infiltration, redistribution, and percolation in partially saturated soils. This study presents a mechanistic methodology based on volumetric porosity, soil granulometric curve, transient water flow event analysis (vertical infiltration), and drainage due to gravity. A numerical model using the one-dimensional Richards equation is developed to describe vertical infiltration. The methodology is also applied to characterize the hydrodynamics of three types of soil.
APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Giuseppe Pedone, Federica Cotecchia, Vito Tagarelli, Osvaldo Bottiglieri, Madhusudhan B. N. Murthy
Summary: This paper investigates the unsaturated, natural fissured clays in the Southern Apennines, Italy. It analyzes the physical properties and micro- to meso-structural features of the clay and presents water retention data obtained through various techniques. The aim is to understand the relationship between water retention behavior and the fissured structure of the clay.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Geological
Negin Zhalehjoo, Didier Bodin, Geoffrey Jameson, Andrew Papacostas, Ross Guppy
Summary: Foamed bitumen stabilization is a sustainable solution for construction and rehabilitation of pavements, and it improves pavement performance. This paper focuses on the development of a fatigue relationship for Foamed bitumen stabilized (FBS) materials, which will assist in thickness design of FBS flexible pavements.
GEOTECHNICAL TESTING JOURNAL
(2024)
Article
Engineering, Geological
Alejandra Lopez Ramirez, Yinning Zhang, Juha Forsman, Leena Korkiala-Tanttu
Summary: This paper presents the results of an extensive testing program on the stabilization of Finnish soft clay using low emissions binders. The alternative binders, including by-products and pozzolanas, showed higher strength than traditional binders at various densities. Additionally, a simplified CO2 emissions calculation procedure for DDM design and different emissions factors for the investigated binders were proposed.
GEOTECHNICAL TESTING JOURNAL
(2024)
Article
Engineering, Geological
Ashray Saxena, V. Vinay Kumar, Natalia S. Correia, Jorge G. Zornberg
Summary: Reclaimed asphalt pavement (RAP) is widely used in road construction due to its economic and environmental benefits. This study evaluates the millability and recyclability of asphalt layers with paving interlayers (GRAP). It finds that GRAP can be reused in base and surface courses, leading to sustainable roadway construction practices.
GEOTECHNICAL TESTING JOURNAL
(2024)
Article
Engineering, Geological
Buddhima Indraratna, Chathuri M. K. Arachchige, Cholachat Rujikiatkamjorn, Ana Heitor, Yujie Qi
Summary: This article discusses the recycling of waste materials produced in the coal and steel industry as well as the reusing of waste tires, which is a high priority in Australia's urban infrastructure development for environmental preservation. The practical applications of these waste materials in coastal reclamation and road and rail construction are presented, along with comparisons to traditional quarried materials. The research outcomes demonstrate that properly engineered waste mixtures can exceed current technical standards and reduce maintenance intensity, supporting sustainable solutions for future transportation infrastructure development.
GEOTECHNICAL TESTING JOURNAL
(2024)