Article
Geosciences, Multidisciplinary
A. Albar, M. H. Osman, J. D. Nyuin
Summary: This study investigates the membrane penetration effect in the consolidated drained triaxial testing on granitic residual soil. The results show that the membrane penetration gradually occurs during the consolidation stage and affects the volume and stress-strain interpretation of the soil sample. The study also determines the proportion of membrane penetration to be between 25% and 58%.
PHYSICS AND CHEMISTRY OF THE EARTH
(2022)
Article
Computer Science, Interdisciplinary Applications
Jakhongirbek Ganiev, Masaki Nakano, Takayuki Sakai
Summary: Reinforcing soils with fibers can increase strength and stability of geo-structures. The study used a constitutive equation to simulate the experimental results and found that an increase in fiber content led to a decrease in initial stiffness and an increase in initial volumetric compression in the reinforced sand, attributed to the lower initial anisotropy caused by fiber inclusions.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Ke Wang, Hongjie Tang, Rui Wang, Jian-Min Zhang
Summary: A practical nonlinear elastic EBD constitutive model is developed to connect the stress-strain behavior of rockfill material with dam deformation. The traditional EB model has difficulties in simulating settlement and horizontal displacement of rockfill dams, whereas the EBD model can simulate both well. Moreover, the EB model parameters that achieve acceptable simulation of dam deformation result in poor simulation of element level stress-strain behavior, whereas the EBD model can achieve good simulation of both dam deformation and element level stress-strain behavior simultaneously.
Article
Engineering, Geological
Maozhu Peng, Sen Mei, Zhen-Yu Yin
Summary: This study examines the effects of rotational hardening and associated/nonassociated flow on modeling the undrained shear strength of K-0-consolidated clays. The results show that only the MCC model with rotational hardening and nonassociated flow (RNMCC) can reasonably simulate the undrained shear strength.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Construction & Building Technology
Thanh Tu Nguyen, Minh Duc Nguyen, Tong Nguyen, Thanh Chien Phan
Summary: This paper presents laboratory tests on the shear strength and interface shear strength of cement-treated silty soil under consolidated and drained conditions. The results showed that increasing the cement content significantly increased the shear strength and interface shear strength of the soil specimens. The shear strength ratio increased from 1.28 to 2.4, and the interface efficiency factor improved from 1.15 to 1.55 when the cement content increased from 3% to 10% after 28 days. The paper also introduces two empirical models for predicting and assessing the shear strength of cement-treated soil.
Article
Engineering, Geological
Raksiri Sukkarak, Suched Likitlersuang, Pornkasem Jongpradist, Pitthaya Jamsawang
Summary: This study introduces a procedure to determine the strength and stiffness parameters of rockfill materials for characterization with the Hardening Soil (HS) model. Parameters can be obtained based on triaxial and oedometer test results, and the procedure is applicable to various rockfill materials.
SOILS AND FOUNDATIONS
(2021)
Article
Computer Science, Interdisciplinary Applications
Luc Sibille, Nadia Benahmed, Felix Darve
Summary: This study investigates the capability of a discrete element model to predict the constitutive response of a soil, showing that the model, calibrated from monotonous drained triaxial compressions, can provide good qualitative and quantitative predictions even for non-rectilinear loading paths or those involving rotation of principal stress axes. The study also emphasizes the importance of simplicity of use and robust validation loading paths for such a modelling framework.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
N. S. Correia, S. A. Rocha, P. C. Lodi, J. S. McCartney
Summary: The study showed that the fiber content had a greater influence on apparent cohesion than on the friction angle. In drained tests, the inclusion of fibers increased shear strength, while in undrained tests, shear strength was not affected by pore water pressure. Drainage had a significant impact on the improvement in peak shear strength of fiber-reinforced soils.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Engineering, Civil
Wan-Li Guo, Zheng-Yin Cai, Ying-Li Wu, Chen Zhang, Jun-Jie Wang
Summary: The dilatancy equation plays a significant role in establishing an elastoplastic constitutive model for soils. A new dilatancy equation incorporating strain hardening and strain softening for rockfill materials was studied, and its applicability was verified through triaxial compression tests.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Jorge Romana-Giraldo, L. Sebastian Bryson
Summary: This study aimed to predict the triaxial behavior of cohesive soils using a geophysics-based approach. Laboratory tests and measurements were conducted, and a function relating mean effective stresses and shear wave velocities was developed to predict undrained and drained behavior. The proposed methodology performed well in simulating different soil properties under undrained and drained conditions.
JOURNAL OF APPLIED GEOPHYSICS
(2023)
Article
Engineering, Ocean
Xuguang Chen, Fengpeng Zhang, Xixi Liu, Hui Li, Xian Zhang, Qiang Wei, Lizhen Wang, Hanfeng Tang, Jiakang Wei, Kehu Li
Summary: This study reproduces the evolution process of consolidated silt in a silty seabed under waves through flume experiments, focusing on the response of pore water pressure, soil strength variation, and changes in soil particle characteristics. The findings suggest that the silty seabed undergoes two stages, failure and reconsolidation, ultimately forming a high-strength consolidated silt layer.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Geological
Jiang Yuan-jun, Mehtab Alam, Su Li-Jun, Muhammad Umar, Shamsher Sadiq, Li Jia Jia, Mahfuzur Rahman
Summary: This study investigates the effects of Cunninghamia R. Br roots on the mechanical behavior of loess soil. The results show that the addition of roots increases the shear strength of the soil, provides additional resistance to volumetric deformations, and increases the positive excess pore water pressure. The mechanical response of the soil-root composite depends on the type of root orientation, with the horizontal-vertical (grid) root orientation showing the highest shear strength improvement. The findings of this research will contribute to the development of a predictive constitutive model for soil-root composite.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Civil
R. F. Sharafutdinov
Summary: This research paper presents the statistical analysis of deformation parameters for clay soils obtained from triaxial tests, focusing on different age and genesis. The results reveal that the stiffness of overconsolidated soils is approximately half of that in normally consolidated or lightly overconsolidated soils. The proposed equations can be applied for preliminary estimation of stiffness parameters and in geotechnical models for considering the distribution of stiffness.
MAGAZINE OF CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Raimundo Francisco Perez Leon, Juan Felix Rodriguez Rebolledo, Bernardo Caicedo Hormaza
Summary: This study obtained the mechanical parameters of an artificial reconstituted soft soil for centrifuge modelling and calibrated it with the hardening soil (HS) model. The reconstituted soil mimicked most natural lacustrine deposits of soft soils, making it suitable for finite element analysis.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Manuela Correa-Silva, Nuno Cristelo, Mohamed Rouainia, Nuno Araujo, Tiago Miranda
Summary: This paper investigates the mechanical behavior of alkaline cements used for soil stabilization through triaxial testing. The results show that the alkali-activated binder can effectively stabilize soil without causing contamination. The study also provides a constitutive model that accurately predicts the stress-strain response of the cemented clay.