Article
Construction & Building Technology
Haidar Hosamo, Iyad Sliteen, Songxiong Ding
Summary: This paper investigates the bearing capacity of a ring footing on geogrid reinforced sand through numerical analysis using FLAC3D 7.0. The study found that an intersection zone was developed in soil under the inner side of the ring footing, contributing to its bearing capacity. It was also observed that the bearing capacity of the ring footing could significantly increase if a single-layer or double-layer geogrid was laid at a proper depth.
Article
Engineering, Geological
K. Kazemi, M. R. Arvin, N. Hataf, A. Khademhosseini
Summary: This study examines the behavior of square footings on geocell-reinforced sand slopes. The results show that geocell reinforcement is more effective when the distance between the footing and the edge of the slope is smaller. The optimal depth of placement of the geocell layer is independent of the length of the geocell. Additionally, a greater vertical distance between the top and lower geocell layers leads to a decrease in the performance of the footings, and the width of the geocell has marginal impact on the behavior of the tested models.
GEOSYNTHETICS INTERNATIONAL
(2022)
Article
Polymer Science
Juan Hou, Sitong Liu, Boohyun Nam, Yanxia Ma
Summary: A series of model tests were conducted to investigate the bearing capacity and reinforced mechanism of a horizontal-vertical (H-V) geogrid-reinforced foundation. The optimal parameters of the H-V geogrid, including length, vertical geogrid height, depth of the top layer, and number of layers, were determined through experiments. The results showed that the H-V geogrid significantly improved the bearing capacity, with a 1.7 times increase compared to conventional geogrid. It also reduced the maximum top subsidence by 13.63% and increased the bearing capacity ratio by 75.28% compared to a single-layer H-V geogrid-reinforced foundation.
Article
Engineering, Geological
Jianfeng Chen, Xiaopeng Guo, Rui Sun, Sathiyamoorthy Rajesh, Song Jiang, Jianfeng Xue
Summary: This study investigated the mechanical response and geogrid fracture behavior of reinforced soil foundation through experiments and numerical simulations. It was found that increasing the number of geogrid layers significantly improves the bearing capacity and stiffness of the soil foundation.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Engineering, Geological
Arman Majidi, Maryam Yazdi
Summary: This study evaluated the bearing capacity and settlement of strip foundation on sandy soil reinforced with scaled geocomposite and geotextile through laboratory model testing. The results showed that using four layers of geocomposite at optimal distances could increase the bearing pressure of the foundation by a factor of 3.4 in the case of ultimate bearing. In the two-layer geocomposite state, the maximum percentage reduction in footing settlement was about 86%.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Engineering, Geological
Arman Majidi, Maryam Yazdi
Summary: This study investigated the strip foundation bearing capacity and settlement on sandy soil reinforced with scaled geocomposite and geotextile through laboratory model testing. Different reinforcement compounds were used in various layers, with identical and varying vertical distances and footing bases. The use of scaled reinforcement with a factor of 7.5 was a crucial consideration in creating more accurate laboratory models. The results showed that all models failed in the lower settlement, with most cases experiencing 7% settlement of the footing width. The maximum increasing factor in bearing pressure was 3.4, which was attributed to the use of four layers of geocomposite at optimal distances.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Engineering, Multidisciplinary
Magdi El-Emam, Youcef El Berizi, Ahmed B. Mabrouk, Sami W. Tabsh
Summary: A parametric study was conducted using the finite element method to investigate the bearing capacity and failure mechanisms of strip footings on cohesionless soil slopes. The study quantified the variations in bearing capacity caused by different design parameters, footing dimensions, and soil properties. A multilinear equation was developed to predict the bearing capacity of the footing on the top of a slope, which showed reasonable accuracy.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Engineering, Geological
Reza Jamshidi Chenari, Richard J. Bathurst
Summary: This paper investigates the influence of time-and strain-dependent reduction in reinforcement stiffness on the bearing capacity and load-settlement response of a footing seated on a thin reinforced granular fill layer over undrained soft clay foundations using finite-difference method (FDM) numerical models. The study shows that the time-and strain-dependent stiffness of the reinforcement significantly affects the bearing capacity and load-settlement response of the reinforced granular base scenario. An analytical solution for the ultimate bearing capacity of strip footings seated on thin unreinforced and reinforced granular layers over undrained clay is proposed, along with the calculation of bearing capacity factors to be used with the analytical solution.
GEOTEXTILES AND GEOMEMBRANES
(2023)
Article
Construction & Building Technology
Pezhman Fazeli Dehkordi, Alireza Mirabolghasemi Dehkordi, Ali Mohamad Shirani Faradonbe
Summary: This study investigates the behavior of non-adjacent RC footings on unreinforced and geocell-reinforced sand slopes. Through experiments and case studies, it is found that the inclusion of geocell reinforcement and varying loads significantly enhance the load-carrying capacity of the non-identical RC footing systems, with an improvement exceeding 300%. Moreover, wider footings show higher levels of efficiency and improvement, depending on the distance from the slope crest and load intensity disparity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Environmental Sciences
Bilal Ahmad Malik, Mohammad Yousuf Shah, Vishwas A. Sawant
Summary: The experimental study on micropiles placed in sand around a square footing showed that micropiles can significantly improve the load-bearing capacity and settlement characteristics of the footing. The slenderness ratio of micropiles has a significant impact on the load-carrying capacity, but the effect becomes insignificant beyond a certain value.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Marine
Zhao-gang Luo, Xuan-ming Ding, Qiang Ou, Hua-qiang Fang
Summary: This study investigates the bearing capacity and deformation behavior of a rigid strip footing on coral sand slopes using model-scale tests. The results show that geogrid reinforcement significantly improves the bearing capacity of coral sand slopes. The bearing capacity increases with the increasing edge distance and the decreasing slope height and angle.
Article
Engineering, Geological
J. Derksen, M. Ziegler, R. Fuentes
Summary: This study investigated the bearing capacity failure of geosynthetic-reinforced soil walls through small- and large-scale experiments. It was found that the failure initially occurred at the rear end of the bottom reinforcement, and a multi-body failure mechanism was observed below the base of the wall. These findings are important for understanding the behavior of soil structures and improving engineering practices.
GEOSYNTHETICS INTERNATIONAL
(2022)
Article
Engineering, Geological
Yajun Li, Jianguang Li, Nengxiong Xu, Gordon A. Fenton, Philip J. Vardon, Michael A. Hicks
Summary: Correlation length is an important parameter for defining spatial correlation characteristics of soil properties. However, limited geotechnical site investigations make it difficult to determine the correlation length accurately. The concept of worst-case correlation length has significant implications in reliability-based designs, allowing for conservative estimation of the reliability of geotechnical structures. However, the definition of worst-case correlation length in literature is unclear and controversial.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2023)
Article
Engineering, Geological
Muhammad Nouman Amjad Raja, Sanjay Kumar Shukla
Summary: The study found that the wraparound reinforced model resulted in less settlement compared to the planar reinforced model, with an increase in efficiency as load amplitude increased and a decrease in the rate of total cumulative settlement with an increase in number of load cycles. The wraparound reinforced model showed about 45% lower average total settlement compared to the unreinforced model.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Mahmoud Elshafey, Mohamed Elnaggar, Ahmed Yehia Abdelaziz
Summary: This paper presents a numerical investigation on the behavior of reinforced earth retaining walls when used as a quay wall. The study found that the stiffness of the geogrid is the most significant parameter affecting lateral performance, and smaller geogrid spacing can reduce lateral and vertical deformation.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Gaurav Tiwari, Gali Madhavi Latha
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2019)
Article
Engineering, Environmental
Gaurav Tiwari, Gali Madhavi Latha
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2020)
Article
Materials Science, Characterization & Testing
N. Roy, P. Vangla, J. D. Frost, G. M. Latha
Summary: Angularity is a crucial aspect of particle morphology that directly affects the mechanical properties and strength of granular materials. Although numerous methods have been proposed to assess particle angularity, no single method has proven to be fully successful in distinguishing all particle types and providing accurate quantitative values. This paper evaluates four commonly used angularity quantification methods and introduces a new approach that outperforms existing methods in differentiating between various particle classes.
JOURNAL OF TESTING AND EVALUATION
(2022)
Article
Engineering, Geological
Gali Madhavi Latha
Summary: Geocells have various applications in civil engineering, particularly in reinforced soil structures and transportation geotechnical applications. They have been shown to improve load-bearing capacity, resilient modulus, and earthquake resistance in different scenarios.
INDIAN GEOTECHNICAL JOURNAL
(2021)
Article
Engineering, Geological
Anjali G. Pillai, Madhavi Latha Gali
Summary: This study investigated the effects of particle shape on the interaction mechanisms and shear strength of GCL-sand interfaces through interface direct shear tests. The results showed that manufactured sand provides more effective particle-fiber interlocking compared to river sand. Additionally, the role of particle shape on the hydration of GCL was explored, with manufactured sand leading to better interface shear strength and lesser hydration related damages to GCL.
GEOTEXTILES AND GEOMEMBRANES
(2022)
Article
Engineering, Geological
Anjali G. Pillai, Madhavi Latha Gali
Summary: The friction in GCL-sand interfaces is controlled by the shape characteristics of the sand grains and the surface texture of the GCL. The hydration of bentonite in the GCL also affects the friction at the interface. The use of manufactured sand improves the interface shear strength due to its shape and results in less hydration of the bentonite layer.
INTERNATIONAL JOURNAL OF GEOSYNTHETICS AND GROUND ENGINEERING
(2022)
Article
Engineering, Geological
Gali Madhavi Latha, Balaji Lakkimsetti
Summary: This study evaluates the size and shape of sand grains through image-based characterizations and relates them to the liquefaction potential of the sand. Results showed that smaller grain size and regular shape of the particle increase the liquefaction tendency.
INDIAN GEOTECHNICAL JOURNAL
(2022)
Article
Engineering, Geological
A. G. Pillai, M. L. Gali
Summary: This study conceptualized a repeated interface shearing test to simulate the shear behavior of Geosynthetic Clay Liners (GCL) in landfill sites. The results showed that the variation of the peak interface shear stress is governed by different mechanisms. Digital image analysis and quantification of sand particle entrapment and surface changes helped in understanding the micro-level interaction mechanisms.
GEOSYNTHETICS INTERNATIONAL
(2022)
Review
Engineering, Environmental
K. Anusree, Gali Madhavi Latha
Summary: The morphology of granular materials, particularly their grain shape, has a significant impact on their physical, mechanical, and hydraulic behavior. This paper provides a comprehensive review of current methods for characterizing grain shapes, focusing on digital image analysis techniques. The review critically evaluates the strengths and limitations of different approaches for acquiring shape information and measuring grain shapes. It also discusses the application of grain shape characterization in analyzing the macro-scale behavior of sand and emphasizes the need for objective-oriented shape characterizations that enable micro-to-macro correlations using robust tools and technologies.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Hasthi Venkateswarlu, Prerana Krishnaraj, G. Madhavi Latha
Summary: Three-dimensional (3D) printing technology is being used in civil engineering to replace conventional manufacturing processes for materials, offering control over the properties of the materials produced. This study focuses on the importance of various printing controls on the mechanical response of 3D-printed polypropylene (PP) sheets for geotechnical applications. The number of layers, printing speed, and orientation were varied, and the results showed that orientation had the greatest influence on the mechanical response. Diagonal printing produced the highest tensile strength and interface shear strength, while horizontal printing produced the lowest. Image analysis was conducted to investigate the reasons for these variations and provide recommendations for 3D printing of PP sheets.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Geological
Balaji Lakkimsetti, Gali Madhavi Latha
Summary: This paper presents a fundamental study on the effects of grain size and shape on the preliquefaction, liquefaction, and post-liquefaction shearing behavior of granular ensembles. Different granular materials of different sizes and shapes were chosen for the study. Experiments were carried out on reconstituted specimens at different relative densities, and the results were interpreted using the critical state framework. The study found that grain size and shape significantly affected the liquefaction resistance and post-liquefaction shear strength of the granular ensembles.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Aarya Krishna, Gali Madhavi Latha
Summary: Geocells, as a stable support to heavy loads, have evolved in terms of their geometric configuration to ensure optimum reinforcement efficiency. This paper reviews the effects of various factors, such as shape, size, stiffness, and surface roughness of geocells, as well as properties of infill and native soils, on their performance. The application of geocells in pavements is discussed, highlighting their ability to improve load carrying capacity, reduce rut depths, and increase traffic benefit ratio (TBR), while also offering the added advantages of reduced carbon footprint and maintenance costs.
Article
Engineering, Geological
Gali Madhavi Latha, Hasthi Venkateswarlu, Prerana Krishnaraj, Sai Kumar Allam, K. V. Anusree, Aarya Krishna
Summary: This study explores the methods and applications of 3D printing in geotechnical engineering, emphasizing the importance of optimizing 3D printing parameters. Through experimental research, the study finds that printing direction and printing material have significant effects on the mechanical performance of the products. Additionally, the study compares the effectiveness of different printing techniques in replicating natural materials.
INDIAN GEOTECHNICAL JOURNAL
(2023)
Article
Engineering, Geological
Rizwan Khan, Gali Madhavi Latha
Summary: This study investigates the influence of particle shape on the shear behavior of sand-geomembrane interfaces. The findings indicate that irregular particles lead to deeper indentations and larger localized shear zones, which in turn increase the shear strength of the interface.
INTERNATIONAL JOURNAL OF GEOSYNTHETICS AND GROUND ENGINEERING
(2023)
Article
Engineering, Environmental
Gaurav Tiwari, Gali Madhavi Latha
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2019)
