Article
Computer Science, Interdisciplinary Applications
Guoqing Cai, Bowen Han, Annan Zhou, Jian Li, Chenggang Zhao
Summary: A bounding surface model is established in this study to accurately describe the stress-strain relationship of unsaturated soil with constant matric suction. By introducing the concept of fractional accumulated strain rate and using the movable mapping centre rule, the cyclic loading history and hysteresis characteristics of the dynamic stress-strain curve are considered, resulting in a reasonable description of the curve shape.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Mathematics, Interdisciplinary Applications
Gaoliang Tao, Qing Wang, Qingsheng Chen, Sanjay Nimbalkar, Yinjie Peng, Heming Dong
Summary: This study successfully predicts the relative permeability coefficient of different soil types using a simplified unified model and air-entry value prediction model combined with graphical method, with results consistent with measured values. The method is simple, expands the application range of the model, and improves prediction accuracy.
FRACTAL AND FRACTIONAL
(2021)
Article
Engineering, Geological
Arpit Jain, Satyendra Mittal, Sanjay Kumar Shukla
Summary: The development of pore water pressure through seismic effect is a major cause of liquefaction failures in geotechnical engineering structures. Consolidated undrained cyclic triaxial tests were conducted to evaluate the normalized dissipated energy required for triggering liquefaction in homogeneous and stratified soil specimens. The test results showed significant variations in the dissipated energy of homogeneous specimens with different cyclic stress ratios and relative densities, and the thickness and location of the silt layer were found to be major influencing factors in stratified specimens. Empirical models were developed to estimate the normalized dissipated energy for both homogeneous and stratified conditions, providing more realistic results than other failure criteria.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Kai Liu, Wen-Bo Chen, Jian-Hua Yin, Wei-Qiang Feng, Lalit Borana
Summary: Limited studies have been conducted on the development of testing apparatus for unsaturated soils due to their complex structure and demanding calibration process. A novel multifunctional apparatus (MFA) has been designed in this study, which is capable of conducting various tests under suction-controlled conditions. The MFA has shown reliable performance in accurately investigating the engineering behavior of both saturated and unsaturated geomaterials.
Article
Construction & Building Technology
Amit Kumar Ram, Parul Rawat, Supriya Mohanty
Summary: This study explains the interpretation of strain-controlled static triaxial tests on homogenous samples and layered soil-waste systems. The results show significant improvement in shear strength parameters and maximum improvement in bearing capacity under a 2-layered system for the considered soil. The layered soil-waste system not only has geotechnical applications but also addresses environmental problems.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Abubakar Kawuwa Sani, Rao Martand Singh
Summary: Geothermal energy piles (GEPs) are an environmentally friendly heat exchange technology that serves the dual purpose of load support and meeting building heating/cooling needs. A numerical study explored the long-term behavior of energy piles in unsaturated soils under cyclic heating and cooling loads, finding that alternating the heating and cooling of the piles results in lower temperature development compared to collectively heating and cooling all of the piles in the group.
Article
Chemistry, Physical
Boyu Wang, Rishi Gupta
Summary: This study investigates the impact of repair material type, length of repaired region, and loading regime on the structural characteristics of repaired reinforced concrete beams. Results suggest that repair materials with high compressive and flexural strength are beneficial, and full-length repair beams outperform partial repair beams under static loading conditions.
Article
Engineering, Geological
M. de Cristofaro, L. Olivares, R. P. Orense, M. S. Asadi, N. Netti
Summary: Volcanic pyroclastic deposits have a collapsible structure and their liquefaction behavior can be explained and compared using the steady-state concept and the state parameter.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Environmental
Avinash Kumar Singh, Jagdish Prasad Sahoo
Summary: In this study, lignosulfonate was used as a stabilizer for high plastic clay to improve strength and durability of soil specimens. Under static loading, there was a significant increase in unconfined compressive strength, while under cyclic loading, reductions in axial strains and rate of axial strain development were observed for the stabilized soil specimens.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Guoqing Cai, Jian Li, Shaopeng Liu, Jiguang Li, Bowen Han, Xuzhen He, Chenggang Zhao
Summary: In this paper, the discrete element method is used to simulate triaxial tests of unsaturated soil under a tension-shear state. The effects of water content on soil mechanical properties are analyzed, and the mechanism and process of failure are discussed.
Article
Engineering, Geological
Danial Shirkavand, Kazem Fakharian
Summary: The shear modulus (G) in sands changes with variations in the degree of saturation. The matric suction in unsaturated sands increases the effective stress and consequently the shear modulus. The relationship between G/Gsat variations and matric suction is complex and requires in-depth evaluations.
ENGINEERING GEOLOGY
(2023)
Article
Construction & Building Technology
Junhui Zhang, Junhui Peng, Anshun Zhang, Jue Li
Summary: The moisture content, number of cyclic loading, deviatoric stress, and confining pressure have significant effects on the evolution of cumulative permanent strain in subgrade soils. In hot and humid climates, subgrade soils are prone to saturation, leading to significant cumulative permanent strain. A new prediction model for permanent deformation of subgrade soils in Southern China was proposed and validated.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Engineering, Geological
Arunodi Abeyrathne, Chathurika Jayasundara, Susanga Costa, Jayantha Kodikara
Summary: The coexistence of air and water in void spaces in unsaturated soils makes its mechanical behavior complex, and understanding the behavior patterns of unsaturated soils is crucial. This study evaluates the deviatoric behavior of compacted unsaturated soils in q - v(w) - p space, and finds a critical state surface for compacted unsaturated soils in this space.
Article
Construction & Building Technology
Yuanchun Huang, Sidong Shen, Lei Wang, Tianyi Li, Xianlei Fu
Summary: This paper studies the one-dimensional consolidation behavior for unsaturated stratum subjected to piecewise cyclic loading using a semi-analytical method. Verification work and parametric studies were conducted, providing theoretical basis for ground treatment of unsaturated soils.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Siavash Afsharpour, Meghdad Payan, Reza Jamshidi Chenari, Hadi Ahmadi, Hessam Fathipour
Summary: The ultimate bearing capacity of shallow foundations resting on partially saturated soils is rigorously evaluated in this study. The results indicate that the matric suction has a marked influence on the bearing capacity of shallow foundations.
GEOMECHANICS AND ENGINEERING
(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)