Showing papers in "Journal of Geotechnical and Geoenvironmental Engineering in 2020"
TL;DR: In this paper, the particle breakage and compressibility behavior of sands treated with microbially induced carbonate precipitation (MICP) was investigated using oedometric compression tests.
Abstract: The particle breakage and compressibility behavior of sands treated with microbially induced carbonate precipitation (MICP) has been investigated using oedometric compression tests. The aci...
88 citations
TL;DR: In this article, a bio-induced calcium carbonate precipitation (MICP) technique is used to improve the strength and stiffness of soils, and various parameters affect the behavior of MICP.
Abstract: Microbial-induced calcium carbonate precipitation (MICP) is a bio-mediated technique that may be used to improve the strength and stiffness of soils. Various parameters affect the behavior ...
76 citations
TL;DR: Estimation of Newmark sliding displacement plays an important role for evaluating seismic stability of slopes and current empirical models generally utilize predefined functional forms and rel...
Abstract: Estimation of Newmark sliding displacement plays an important role for evaluating seismic stability of slopes Current empirical models generally utilize predefined functional forms and rel
47 citations
TL;DR: Clayey/silty sands are widespread as naturally sedimentary soils such as marine deposits in estuaries and offshore locations as mentioned in this paper and they belong to a unique class of gap-graded soils featuring a d...
Abstract: Clayey/silty sands are widespread as naturally sedimentary soils such as marine deposits in estuaries and offshore locations. They belong to a unique class of gap-graded soils featuring a d...
44 citations
TL;DR: The soil sorptive potential (SSP) has been recently theorized as the physical source for matric potential and local pore-water pressure as mentioned in this paper, which consists of four distinct physicochemical potenti...
Abstract: The soil sorptive potential (SSP) has been recently theorized as the physical source for matric potential and local pore-water pressure. It consists of four distinct physicochemical potenti...
41 citations
TL;DR: In this paper, the design and construction-related factors that affect leakage through geomembranes, used either alone or in a composite liner, are examined and the development, detection, and number of holes t...
Abstract: Design- and construction-related factors that affect leakage through geomembranes, used either alone or in a composite liner, are examined. The development, detection, and number of holes t...
41 citations
TL;DR: In the past half century, unsaturated soil mechanics has emerged as a flourishing expansion of classical soil mechanics in dealing with mechanics of soil under partially saturated conditions (Lu and Likos 2004), and the field is broad because it includes all physical processes of water flow, heat transfer, electrical flow, chemical transport, and stress and deformation as mentioned in this paper.
Abstract: The author would like to use this forum article to express his views that: (1) current research and practice of unsaturated soil mechanics is in a vibrant and very healthy state, and (2) some outstanding fundamental challenges and recent breakthroughs will provide unparalleled opportunities for future research and practice. In the past half century, unsaturated soil mechanics has emerged as a flourishing expansion of classical soil mechanics in dealing with mechanics of soil under partially saturated conditions (Houston 2019). The field is broad because it includes all physical processes of water flow, heat transfer, electrical flow, chemical transport, and stress and deformation in the vast near-surface earth environment (Lu and Likos 2004). Unsaturated soil mechanics is at the intersection of several disciplines of engineering and science such as geotechnical engineering, geoenvironmental engineering, agricultural science, soil physics, and hydrology. Driven by the practical problems in these disciplines, research activities in unsaturated soil mechanics are dynamic and continue to rapidly evolve. Current theoretical foundations for practical solutions are mostly from classical yet inadequate concepts of soilwater potential (e.g., Iwata 1972; Or et al. 2002), matric suction (e.g., Fredlund and Rahardjo 1993; Lu and Likos 2004), effective stress (Bishop 1959), and independent stress variables (e.g., Coleman 1962; Matyas and Radhakrishna 1968; Fredlund and Morgenstern 1977). The routine use of these state variables provides some basis for frameworks aimed to solve practical problems such as design and analysis of earthen structures with expansive and collapsing soil (e.g., Fredlund and Houston 2009; Houston et al. 2018), shallow foundation design and analysis (e.g., Oh and Vanapalli 2011), energy foundations (e.g., Murphy et al. 2015), and slope stability under natural and engineered environments (e.g., Ching et al. 1984; Rahardjo et al. 2001). However, these state variables fail in explaining, describing, and predicting many phenomena occurring in the near-surface environment such as soil-water cavitation, expansive and collapsing soil behavior, and soil freezing and thawing behavior, among others. This is largely due to the omission of fundamental physical mechanisms of soilwater interaction in the basic concepts of matric suction, pore water pressure, effective stress, and independent stress variables. Consequently, frameworks or solutions for practical geotechnical and geoenvironmental engineering problems based on the current concepts of matric suction, effective stress, and independent stress variables are not physically and mechanically sound; they are inadequate in their realistic physical representation of soil-water interaction. The history of geotechnical engineering, like many other disciplines, shows that engineering problems are best solved when the underlying fundamental variables are well defined, tested, and applied.
39 citations
TL;DR: In this paper, the bearing performance of precast concrete piles embedded within calcareous sands with biogrouting at the pile toe was investigated, and the results showed that the load-bearing performance of the precast piles could be improved by using Biogrout-improved and improved loading tests.
Abstract: This technical paper investigates the bearing performance of precast concrete piles embedded within calcareous sands with biogrouting at the pile toe. Loading tests of biogrout-improved and...
38 citations
TL;DR: In this paper, the authors studied the effect of seepage flow on the detachment and migration of fine particles through voids among coarse particles, referred to as suffusion, which is a typical form of internal erosion.
Abstract: As a typical form of internal erosion, suffusion refers to the detachment and migration of fine particles through voids among coarse particles driven by seepage flow. This paper studies the...
37 citations
TL;DR: Microbially induced calcite precipitation (MICP) is a ground improvement technique that uses ureolytic bacteria to biocement soils by precipitating calcium carbonate on soil contacts and su...
Abstract: Microbially induced calcite precipitation (MICP) is a ground improvement technique that uses ureolytic bacteria to biocement soils by precipitating calcium carbonate on soil contacts and su...
37 citations
TL;DR: In this article, a new approach to assess the liquefaction triggering of saturated sandy soils based on comprehensive laboratory datasets in conjunction with the concept of binary packin-in is presented.
Abstract: This paper presents a new approach to assess the liquefaction triggering of saturated sandy soils based on comprehensive laboratory datasets in conjunction with the concept of binary packin...
TL;DR: The behavior of an energy pile in a group is different from that of an isolated energy pile due to thermal and mechanical interactions as mentioned in this paper, and the authors of this paper aim to extend the load transfer method to groups.
Abstract: The behavior of an energy pile in a group is different from that of an isolated energy pile due to thermal and mechanical interactions. This study aims to extend the load transfer method to...
TL;DR: One third of the global land area suffers from wind erosion, and its prevention is a critical issue in arid regions of the world as discussed by the authors, and during a wind erosion event, the impacts of saltating grain...
Abstract: One-third of the global land area suffers from wind erosion, and its prevention is a critical issue in arid regions of the world. During a wind erosion event, the impacts of saltating grain...
TL;DR: In this article, track degradation and defects of existing passenger and freight mixed railroads are concentrated in bridge-embankment transition zones and heavy axle load (HAL) operation on existing railroads.
Abstract: Track degradation and defects of existing passenger and freight mixed railroads are concentrated in bridge–embankment transition zones. Heavy axle load (HAL) operation on existing railroads...
TL;DR: Ettringite usually forms in lime and cement-stabilized gypseous soils, resulting in significant swelling upon wetting and thereby causing damage to pavements and foundation systems as discussed by the authors.
Abstract: Ettringite usually is formed in lime- and cement-stabilized gypseous soils, resulting in significant swelling upon wetting and thereby causing damage to pavements and foundation systems. To...
TL;DR: In this paper, a full-scale test was carried out to investigate the interactions between an energy pile and four traditional piles connected to the same overlying reinforced beam, and a series of sensors were used to detect the interactions.
Abstract: A full-scale test was carried out to investigate the interactions between an energy pile and four traditional piles connected to the same overlying reinforced beam. A series of sensors was ...
TL;DR: Specific surface area (SSA) of soil is an intrinsic property governing many geotechnical and geoenvironmental engineering properties as mentioned in this paper and can be physically divided into two categories: exte...
Abstract: Specific surface area (SSA) of soil is an intrinsic property governing many geotechnical and geoenvironmental engineering properties. SSA can be physically divided into two categories: exte...
TL;DR: In this paper, the seismic performance of hypothetical tall buildings by estimating intensity measures, engineering demand parameters, and earthquake-induced losses using a soil-struc..., was evaluated.
Abstract: This paper evaluated the seismic performance of hypothetical tall buildings by estimating intensity measures, engineering demand parameters, and earthquake-induced losses using a soil–struc...
TL;DR: In this article, a critical state plasticity model for predicting the response of sands to cyclic loading is presented, based on the well-known bounding surface SANISAND framework.
Abstract: This work presents a critical state plasticity model for predicting the response of sands to cyclic loading. The well-known bounding surface SANISAND framework by Dafalias and Manzari is en...
TL;DR: In this article, the authors present the behavior of energy pile groups in the presence of rafts and the thermomechanical interaction between piles, and show that energy piles generally show different behavior than single energy piles.
Abstract: Energy pile groups generally show different behavior than single energy piles because of the presence of rafts and the thermomechanical interaction between piles This paper presents the re
TL;DR: The influence of particle shape was evaluated under drained and undrained (constant volume) condition using three-dimensional (3D) cubical assemblies of spheres, ellipsoids, and cluster of... as mentioned in this paper.
Abstract: The influence of particle shape was evaluated under drained and undrained (constant volume) condition using three-dimensional (3D) cubical assemblies of spheres, ellipsoids, and cluster of ...
TL;DR: One-g shake table tests were conducted to characterize seismic demands and reveal failure mechanisms of pile-supported bridges in liquefiable soils with crusts subjected to different scour conditions as discussed by the authors.
Abstract: One-g shake-table tests were conducted to characterize seismic demands and reveal failure mechanisms of pile-supported bridges in liquefiable soils with crusts subjected to different scour ...
TL;DR: The interaction between surface structures and buried pipes is unavoidable as mentioned in this paper, and placing the pipe at a shallow depth, near to the surface, attracts substantial additional earth pre-convexity.
Abstract: The interaction between surface structures and buried pipes is unavoidable. For instance, placing the pipe at a shallow depth, near to the surface, attracts substantial additional earth pre...
TL;DR: The proliferation of data collected by modern tunnel boring machines presents a substantial opportunity for the application of data-driven anomaly detection (AD) techniques that can adapt dynamically to the environment as mentioned in this paper.
Abstract: The proliferation of data collected by modern tunnel boring machines presents a substantial opportunity for the application of data-driven anomaly detection (AD) techniques that can adapt d...
TL;DR: In this paper, an experimental study was conducted to assess the effectiveness of lime stabilization with precompaction mellowing in stabilizing six different high-sulfate soils, and three mellowing times, 0.
Abstract: An experimental study was conducted to assess the effectiveness of lime stabilization with precompaction mellowing in stabilizing six different high-sulfate soils. Three mellowing times, 0,...
TL;DR: The low viscosity and the ability to control solidification rate make colloidal nanosilica grout an excellent ground-improvement solution which is functional for different engineering purpos... as discussed by the authors.
Abstract: The low viscosity and the ability to control solidification rate make colloidal nanosilica grout an excellent ground-improvement solution which is functional for different engineering purpo...
TL;DR: In this article, microbial-induced carbonate precipitation (MICP) methods have been developed in recent years for soil improvement to simultaneously increase the shear strength and reduce the permeability of soil.
Abstract: Microbial-induced carbonate precipitation (MICP) methods have been developed in recent years for soil improvement to simultaneously increase the shear strength and reduce the permeability o...
TL;DR: In this article, the axial limiting capacities and load-displacement behavior of displacement piles are predicted for a wide range of structures, including bridges, dams, and road bridges.
Abstract: Displacement piles are driven to support a wide range of structures. Predicting their axial limiting capacities and load-displacement behavior is critical to many such engineering applicati...
TL;DR: In this paper, a 13-story building in Shanghai fell abruptly to the ground in 2009, and the cause of the fall remains uncertain. But physical evidence, limit-equilibrium analyses, extensive calculations, and t
Abstract: To date, why a 13-story building in Shanghai fell abruptly to the ground in 2009 remains uncertain. By review of physical evidence, limit-equilibrium analyses, extensive calculations, and t...
TL;DR: The cyclic-stress approach is widely used to evaluate level ground liquefaction triggering as mentioned in this paper, however, several limitations introduce significant uncertainty in the analysis, including the uncertainty of the cyclic stress model.
Abstract: The cyclic-stress approach is widely used to evaluate level-ground liquefaction triggering. Although easy to use, several limitations introduce significant uncertainty in the analysis, incl...