Article
Engineering, Geological
Nima R. Alkhorshid, Gregorio L. S. Araujo, Ennio M. Palmeira
Summary: This study investigated the performance of granular columns in soft clay, finding that they play an important role in reducing settlements and accelerating consolidation settlements.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Athina Grizi, Wisam Al-Ani, Dariusz Wanatowski
Summary: This study used a comprehensive 3D finite element analysis to investigate the influence of design parameters on the settlement behavior of stone columns supporting shallow foundations. The results showed that the model accurately predicted long-term settlement and revealed that the presence of a stiff crust layer significantly affected the deformation mode of the stone columns.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Ye Cheng, Xiaocong Cai, Haizhao Mo, Meixiang Gu
Summary: This paper established seven models to study the behavior of floating stone columns using the finite difference method. The results showed that the bearing capacity of F-OSCs and F-ESCs increased with the increase in column and encasement length, respectively. A critical length was found for settlement improvement. The bulging deformation in F-OSCs was significant and could be decreased by geogrid encasement, while the failure mode in F-ESCs was a punching failure.
Article
Engineering, Multidisciplinary
Fang Xu, Hossein Moayedi, Loke Kok Foong, Mohamad Jamali Moghadam, Milad Zangeneh
Summary: Stone columns can be used to improve weak soils, increase bearing capacity, and reduce settlement, but the length and dimensions of the stone columns significantly affect their effectiveness. When designing, it is important to ensure the performance of the stone columns according to appropriate conditions to maximize their improvement effect on the soil.
Article
Chemistry, Multidisciplinary
Yu Zhang, Zuodong Jin, Yunlong Hou, Bingbing Han, Charles Ntakiyimana
Summary: This paper discusses the significant impact of groundwater on excavation deformation of foundation pits in soft soil areas. Through numerical simulation and analysis of the seepage model of foundation pits, the study concludes that waterproof curtains can effectively reduce surface settlement.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Jung Chiang, Emerson Edwige Michel, Kuo-Hsin Yang, Jorge G. Zornberg
Summary: The study conducted reduced model tests on soil foundations reinforced by Geosynthetic-Encased Granular Columns (GECs) placed across a reverse fault, aiming to evaluate the effectiveness and reinforcing mechanism. The results showed that the GEC foundation can significantly reduce fault-induced angular distortion at the ground surface. Two mechanisms, shear rupture diffusion and diversion effects, were identified for the GEC foundation, depending on fault displacement magnitude and system stiffness.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Geochemistry & Geophysics
Zhongjing Hu, Qingbiao Wang, Shuo Yang, Zhenyue Shi, Bo Liu, Hongxu Song, Fuqiang Wang
Summary: This study used numerical simulation to investigate the stability of deep foundation pits near water bodies, finding that different excavation stages result in varying horizontal and vertical displacements, with seepage in the soft soil foundation affecting pit stability. By accurately modeling and selecting parameters, numerical simulations can effectively predict conditions of actual projects.
Article
Construction & Building Technology
Binhui Ma, Zhiyong Hu, Zhuo Li, Kai Cai, Minghua Zhao, Chengbin He, Qiunan Chen, Bingchu Chen, Xiaocheng Huang
Summary: The article presents an analysis of the bearing characteristics and deformation mechanism of a composite foundation reinforced with geogrid-encased stone columns in order to obtain a settlement calculation method. The results show that the settlement calculated by the proposed method is close to the measured one, overcoming the defect of other methods yielding more dangerous results. The method is more feasible and can be applied in engineering practice.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Geological
Marina Miranda, Jesus Fernandez-Ruiz, Jorge Castro
Summary: Encased stone columns are vertical inclusions in soft soils formed by gravel wrapped usually with a geotextile. The critical length of the columns, which is related to plastic deformation, is found to be around 1.3-2.5 times the footing diameter for encased stone columns, slightly lower for ordinary stone columns. The value of the critical column length may be considered as a general value of 2 and 2.5 times the footing diameter for ordinary and encased stone columns, respectively.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Engineering, Geological
Sanish Bhochhibhoya, Roisha Maharjan, Rishav Adhikari, Sagar Gurung, Purushottam Adhikari, Saman Shrestha, Madhu K. C. Sudan
Summary: In Kathmandu Valley, the use of stone columns to mitigate geotechnical problems is crucial due to the dynamic subsoil profile. This study evaluates the suitability of stone columns in the valley and discovers that they greatly enhance soil properties, increase bearing capacity, and reduce settlement. Stone columns are particularly effective in soft clay and can significantly improve liquefaction resistance.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2023)
Article
Acoustics
Yuguo Zhang, Yamin Zhao
Summary: Based on an axisymmetric model, this study establishes consolidation control equations for the vertical drains-impervious columns multi-composite foundation consolidation problem under the assumption of equal strain. Analytical solutions are provided for different distributions of initial pore pressure. Parameter analysis is conducted to study the consolidation characteristics of the multi-composite foundation.
SHOCK AND VIBRATION
(2022)
Article
Multidisciplinary Sciences
Keke Li, Wenyuan Xu, Liang Yang
Summary: This study investigates the deformation characteristics of an old Chinese roadway on a soft soil foundation that has been raised and widened using finite element numerical simulation. The results show different ground surface settlement and slope foot lateral displacement patterns under three construction modes, and suggest that after 15 years, the total settlement of a raised and widened road is significantly larger compared to a road built directly.
Article
Computer Science, Interdisciplinary Applications
Chuanxun Li, Xiangzong Lu, Wenbing Wu, Guoxiong Mei
Summary: This study proposes a set of basic equations to describe the seepage relations among stone columns, vertical drains, and soft soils. The governing consolidation equation is derived, and its reliability is verified by comparing it with field measurements. The consolidation behavior is investigated through a parametric study.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Green & Sustainable Science & Technology
Sudip Basack, Sanjay Nimbalkar
Summary: To address the issues of soft and compressible marine soil foundations, an appropriate ground improvement strategy is necessary, and one successful method is reinforcing with stone columns. A field study was conducted along the eastern coast of Australia, using closely spaced stone columns and measuring load-settlement characteristics with sensors. Finite element modeling was used for two-dimensional plane strain analysis, and the numerical results were compared to field data, demonstrating the accuracy of the model.
Article
Chemistry, Multidisciplinary
Ming Lei, Jin Chang, Jianqing Jiang, Rui Zhang
Summary: The aim of this paper is to clarify the negative pressure distribution in drainage structures of soft foundations reinforced by vacuum preloading. The study focused on the Beijing-Shanghai high-speed railway and established four different soil consolidation models to consider various loading conditions. The consolidation process of the soft foundation was calculated and analyzed in detail. The results show that settlement developed rapidly within the first 30 days, followed by a slowdown and stabilization. The settlement curves obtained from the four different models were consistent with the site monitoring curve initially, but significant differences appeared after 5 days. Pore water pressure decreased noticeably within the first 20 days and then slowed down between days 20 and 30. After the 30th day, the pore water pressure remained constant at all depths. Vacuum preloading affected the soil to a depth of approximately 16 m, and a concave or linear distribution of negative pressure was found in the drainage structure, providing a reference for numerical analysis of vacuum preloading.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Chathuri M. K. Arachchige, Buddhima Indraratna, Yujie Qi, Jayan S. Vinod, Cholachat Rujikiatkamjorn
Summary: This study focuses on the concept of using rubber granules from waste tyres as elastic aggregates blended with traditional ballast particles to improve the performance of rail tracks, forming a Rubber Intermixed Ballast System (RIBS). The research indicates that RIBS with over 10% rubber content consistently reduce dilation under changing confining pressures and effectively control ballast fouling within the granular matrix. The results also show that rubber particles ranging from 9.5 to 19 mm with similar angularity to ballast aggregates are advantageous in reducing the breakage of load-bearing larger aggregates.
Article
Engineering, Ocean
Sanjay Nimbalkar, Sudip Basack
Summary: This paper presents a detailed study on the response of pile group in clay under cyclic lateral loading, with emphasis on bending moment. The findings suggest that the cyclic loading parameters have a significant influence on the bending moment of the piles.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Review
Environmental Sciences
Sudip Basack, M. K. Loganathan, Ghritartha Goswami, Parinita Baruah, Rashidul Alam
Summary: The extent of risk in coastal aquifers, vulnerable to saltwater intrusion, is a crucial measure for sustainable performance of engineering and natural systems. Factors such as sea level rise and human activities contribute to saline water intrusion, causing degradation of freshwater quality. Risk management studies and mitigation measures like Abstraction Desalinization Recharge (ADR) and Qanat-well structure methods are effective in minimizing groundwater abstraction and cost without intensifying saltwater intrusion.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2022)
Article
Engineering, Geological
Isabella Novais Silva, Buddhima Indraratna, Thanh Trung Nguyen, Cholachat Rujikiatkamjorn
Summary: This study investigates the influence of stress anisotropy and plasticity index on the shear behavior of soils and proposes empirical equations to estimate undrained shear strength.
Review
Environmental Sciences
Sudip Basack, M. K. Loganathan, Ghritartha Goswami, Hadi Khabbaz
Summary: This article provides a critical review of saline water intrusion into coastal aquifers and associated risk management. Based on extensive literature survey and critical analysis, the authors summarize the significant contributions in the research area and point out that existing risk prevention and control methodologies may not be effective in many coastal areas. The intensifying coastal hazards due to climate change further exacerbate the challenges in coastal groundwater management.
JOURNAL OF COASTAL RESEARCH
(2022)
Article
Engineering, Geological
Sudip Basack, Sanjay Nimbalkar, Moses Karakouzian, Sameer Bharadwaj, Zhenkun Xie, Nathan Krause
Summary: This paper investigates the effects of stone column reinforcement in soft soil through field-based investigations and laboratory testing. Numerical modeling is also conducted to validate the results. The study shows that the installation of stone columns can significantly alter the properties of soft soil, especially when the columns are closely spaced.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Engineering, Geological
Subhani Medawela, Buddhima Indraratna, R. Kerry Rowe
Summary: This study demonstrates that the porosity of a permeable reactive barrier (PRB) material decreases significantly due to bio-geochemical clogging caused by acidic flow. Laboratory tests over 9 months show that chemical clogging accounts for 57% of the reduction in porosity, while biological clogging accounts for the rest. The proposed mathematical approach estimates that calcite dissolution and bio-geochemical clogging can reduce the surface area of limestone aggregates by over 70%.
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Article
Engineering, Geological
Sudip Basack, Mehrdad Karami, Moses Karakouzian
Summary: This study aims to investigate the performance of pile-soil interaction in loose sand under lateral cyclic loading. Through experimental model tests and numerical models, it is found that lateral cyclic loading produces a stiffening effect on loose sand, enhancing the pile capacity and reducing pile head displacement. Additionally, it is observed that sand relative density significantly influences the test and numerical results.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Bin-Hua Xu, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Thanh T. Nguyen, Ning He
Summary: This study introduces a novel approach using the spectral method to analyze the nonlinear consolidation behavior of multilayered soil associated with coupled vertical-radial drainage. By incorporating time- and depth-dependent stress and soil properties into the model, the proposed method shows greater accuracy in predicting in-situ soil behavior. The parametric study indicates that the ratio between the compression and permeability indices has a significant impact on the consolidation rate.
Article
Engineering, Geological
Warantorn Korkitsuntornsan, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Thanh T. Nguyen
Summary: Previous studies have shown that shallow subgrade soil can transform into a slurry under unfavourable cyclic loading, but the depth-dependent behaviour of soil parameters during this process has not been properly understood. This study used a large-scale cylindrical test rig to observe soil behaviour along the depth of test specimens under cyclic loading, and quantified the onset of soil fluidization. The results showed that excess pore water pressure tends to rise more at the upper layers, causing zero-effective stress, while void ratio expands rapidly within the deteriorated soil fabric, making the water content approach the liquid limit of soil.
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Sudip Basack, Sanjay Nimbalkar
Summary: To address the issues of soft and compressible marine soil foundations, an appropriate ground improvement strategy is necessary, and one successful method is reinforcing with stone columns. A field study was conducted along the eastern coast of Australia, using closely spaced stone columns and measuring load-settlement characteristics with sensors. Finite element modeling was used for two-dimensional plane strain analysis, and the numerical results were compared to field data, demonstrating the accuracy of the model.
Article
Water Resources
Ghritartha Goswami, Sameer Mandal, Sudip Basack, Rishika Mukherjee, Moses Karakouzian
Summary: Rivers play a crucial role in supporting human civilization by providing water for various purposes and transportation of waste. This study examined the impact of land use changes on water quality in the Hooghly River in India. The findings indicate that expanding built-up and agricultural areas have led to a reduction in tree cover and water bodies, causing a decline in water quality. The study emphasizes the need for sustainable land use practices and improved water management to preserve the river ecosystem and maintain water quality. The study's results provide valuable insights for policymakers and stakeholders in addressing the challenges posed by land use changes and population growth.
Article
Engineering, Ocean
Mehrdad Karami, Sudip Basack, Goutam Das, Dwipayan Bhadra, Moses Karakouzian
Summary: The use of helical piles has gained popularity due to advantages and installation convenience. The load transfer mechanism and performance of helical piles have been studied, but further research is needed. The authors conducted laboratory experiments and numerical analysis to study the behavior of helical piles in soft clayey soil. Important conclusions about load-settlement characteristics and pile capacity were drawn from the investigation.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Engineering, Civil
Sudip Basack, Ghritartha Goswami, Hadi Khabbaz, Moses Karakouzian
Summary: Coastal geoenvironment initiates saline water intrusion into freshwater aquifers, leading to a geohydraulic problem that contaminates fresh groundwater resources and alters hydraulic conductivity. This study focuses on the influence of saltwater submergence on nonlinear flow characteristics through granular soil. The research provides an in-depth analysis of the effects of saline water intrusion on nonlinear flow behavior.
CIVIL ENGINEERING JOURNAL-TEHRAN
(2022)
