Showing papers in "Canadian Geotechnical Journal in 2010"
TL;DR: The cylindrical T-bar penetrometer was developed for profiling the undrained strength of soft soils in the centrifuge and is now a widely used offshore site investigation tool.
Abstract: The cylindrical T-bar penetrometer was developed for profiling the undrained strength of soft soils in the centrifuge and is now a widely-used offshore site investigation tool. The conventional int...
148 citations
TL;DR: In this paper, the authors designed a pipeline to accommodate thermal expansion, which is commonly achieved through controlled lateral buckling, and to resist damage from submarine slides, in both cases.
Abstract: Seabed pipelines must be designed to accommodate thermal expansion — which is commonly achieved through controlled lateral buckling — and to resist damage from submarine slides. In both cases, the ...
109 citations
TL;DR: A verified fast Lagrangian analysis of continua (FLAC) numerical model is used to investigate the influence of horizontal toe stiffness on the performance of reinforced soil segmental retaining walls under working stress (operational) conditions as mentioned in this paper.
Abstract: A verified fast Lagrangian analysis of continua (FLAC) numerical model is used to investigate the influence of horizontal toe stiffness on the performance of reinforced soil segmental retaining walls under working stress (operational) conditions. Results of full-scale shear testing of the interface between the bottom of a typical modular block and concrete or crushed stone levelling pads are used to back-calculate toe stiffness values. The results of numerical simulations demonstrate that toe resistance at the base of a reinforced soil segmental retaining wall can generate a significant portion of the resistance to horizontal earth loads in these systems. This partially explains why reinforcement loads under working stress conditions are typically overestimated using current limit equilibrium-based design methods. Other parameters investigated are wall height, interface shear stiffness between blocks, wall facing batter, reinforcement stiffness, and reinforcement spacing. Computed reinforcement loads are ...
101 citations
TL;DR: In this paper, particle damage of three test sands with different mineralogical compositions is studied using stress-displacement response measured in ring shear tests, particle-size distributions and particle-type distributions.
Abstract: In this paper, particle damage of three test sands with different mineralogical compositions is studied using stress–displacement response measured in ring shear tests, particle-size distributions ...
99 citations
TL;DR: In this article, the effect of grain shape and angularity on the undrained behaviour of fine to medium (D50 = 0.15-0.29mm) and uniform sands were examined.
Abstract: The objective of this paper is to discuss the effect of grain shape and angularity on the undrained behaviour of sands. Four fine to medium (D50 = 0.15–0.29 mm) and uniform sands were examined. The...
97 citations
TL;DR: In this paper, one of the most commonly used artificial intelligence techniques, i.e., artificial neural networks (ANNs), is utilized in an attempt to develop artificial neural network (ANN) models that provide more accurate axial capacity predictions for driven piles and drilled shafts.
Abstract: In the last few decades, numerous methods have been developed for predicting the axial capacity of pile foundations. Among the available methods, the cone penetration test (CPT)-based models have been shown to give better predictions in many situations. This can be attributed to the fact that CPT-based methods have been developed in accordance with the CPT results, which have been found to yield more reliable soil properties; hence, more accurate axial pile capacity predictions. In this paper, one of the most commonly used artificial intelligence techniques, i.e., artificial neural networks (ANNs), is utilized in an attempt to develop artificial neural network (ANN) models that provide more accurate axial capacity predictions for driven piles and drilled shafts. The ANN models are developed using data collected from the literature and comprise 80 driven pile and 94 drilled-shaft load tests, as well as CPT results. The predictions from the ANN models are compared with those obtained from the most commonly ...
97 citations
TL;DR: In this paper, the authors examined rheological properties of fine-grained sediments depending on index properties and salinity, and characterized flow behaviors as a function of soil type.
Abstract: Rheological properties of fine-grained sediments depending on index properties and salinity were examined. To characterize flow behaviors as a function of soil type, groups were made for convenienc...
91 citations
TL;DR: In this paper, the modelling capacity of transparent soil was investigated by comparing boundary soil displacement fields under a model footing in a transparent soil model with those from a natural soil model, and the results showed that transparent soil is more robust than natural soil.
Abstract: The modelling capacity of transparent soil was investigated by comparing boundary soil displacement fields under a model footing in a transparent soil model with those from a natural soil model. Tr...
91 citations
TL;DR: In this article, a simplified method to estimate the soil-water characteristic curve (SWCC) for both coarse and fine-grained soils using one-point SWCC measurement and basic index properties was proposed.
Abstract: This paper proposes a simplified method to estimate the soil-water characteristic curve (SWCC) for both coarse- and fine-grained soils using one-point SWCC measurement and basic index properties. P...
89 citations
TL;DR: In this article, the definition and determination of the soil-water retention surface (SWRS) is discussed, which is the tool used to present the hydromechanical behaviour of soils to highlight both the effect of suction on the change in water and total volumes and the effect deformation with respect to the water retention capability.
Abstract: This paper deals with the definition and determination methods of the soil-water retention surface (SWRS), which is the tool used to present the hydromechanical behaviour of soils to highlight both the effect of suction on the change in water and total volumes and the effect of deformation with respect to the water retention capability. An experimental method is introduced to determine the SWRS and applied to a clayey silty sand. The determination of this surface is based on the measurement of void ratio, suction, and water content along the main drying paths. These paths are established for five different initial states. The experimental results allow us to define the parametric equations of the main drying paths, expressing both water content and void ratio as functions of suction and initial void ratio. A model of the SWRS for clayey silty sand is established in the space (void ratio - suction - water content). This surface covers all possible states of the soil inside the investigated range for the three variables. Finally, the SWRS is used to study the relations between water content and suction at a constant void ratio and between void ratio and suction at a constant water content.
89 citations
TL;DR: In this article, finite element upper and lower bound limit analysis is used to produce chart solutions for 3D natural slopes for both short and long-term stability, and the presented chart...
Abstract: This paper uses finite element upper and lower bound limit analysis to produce chart solutions for three-dimensional (3D) natural slopes for both short- and long-term stability. The presented chart...
TL;DR: In this article, the stability of a large cavern group at great depth is discussed on the basis of large-scale three-dimensional (3-D) geomechanical model tests and numerical simulations.
Abstract: The stability of a large cavern group at great depth is discussed on the basis of large-scale three-dimensional (3-D) geomechanical model tests and numerical simulations. The model tests are descri...
TL;DR: In this paper, the uncertainties in soil shear strengths, including undrained shear strength of clay, are quantified for geotechnical reliability-based design and how to reduce the uncer...
Abstract: Quantifications of uncertainties in soil shear strengths, including undrained shear strength of clay, are essential for geotechnical reliability-based design. In particular, how to reduce the uncer...
TL;DR: In this paper, a comprehensive understanding of the macroscopic response of a soil in relation to its structure has not yet been achieved, despite the recent experimental studies of soil structure.
Abstract: Despite the recent experimental studies of soil structure, a comprehensive understanding of the macroscopic response of a soil in relation to its structure has not yet been achieved. This lack of u...
TL;DR: In this paper, the authors present an experimental program that characterizes the mechanical behavior of heterogeneous soils using a large-sized triaxial apparatus (300mm diameter and 600mm height).
Abstract: This paper presents an experimental program that characterizes the mechanical behavior of heterogeneous soils using a large-sized triaxial apparatus (300 mm diameter and 600 mm height). A particula...
TL;DR: In this paper, a statistical damage-based approach was used to study the deformation behavior of natural rocks including voids or porosity variations in the porosity of porosity.
Abstract: With regards to the composition of natural rocks including voids or pores, deformation behavior is strongly affected by variation in porosity. By using a statistical damage-based approach, the char...
TL;DR: Injection of expansive polyurethane resin can be used to remediate differential settlement issues as mentioned in this paper, where the resin is injected incrementally under a structure to achieve a desired foundation level.
Abstract: Injection of expansive polyurethane resin can be used to remediate differential settlement issues. The resin is injected incrementally under a structure to achieve a desired foundation level, formi...
TL;DR: In this paper, the authors describe the results of numerical simulations investigating the installation effects of stone columns in a natural soft clay, and the geometry of the problem is simplified to axial symmetry.
Abstract: This paper describes the results of numerical simulations investigating the installation effects of stone columns in a natural soft clay. The geometry of the problem is simplified to axial symmetry...
TL;DR: In the last few decades there has been a rapid increase in the number of piled foundations where the piles have been employed as settlement reducers; in some recent projects, the piles had been se...
Abstract: In the last few decades there has been a rapid increase in the number of piled foundations where the piles have been employed as settlement reducers; in some recent projects, the piles have been se...
TL;DR: Compacted soils have been widely used as landfill barriers because of their favorable characteristics such as low coefficient of permeability and high swelling as discussed by the authors, however, they are not suitable for landfill barriers.
Abstract: Compacted soils have been widely used as landfill barriers because of favorable characteristics such as low coefficient of permeability and high swelling. Compacted bentonite–sand mixtures are norm...
TL;DR: In this paper, a real-coded genetic algorithm is employed to develop a search approach for locating the noncircular critical slip surface in slope stability analyses, and a dynamic bound technique is presented to improve the search performance with more effective exploration within the solution domain.
Abstract: A real-coded genetic algorithm is employed to develop a search approach for locating the noncircular critical slip surface in slope stability analyses. Limit equilibrium methods and the finite-element-based method are incorporated with the proposed search approach to calculate the factor of safety. Geometrical and kinematical compatibility constraints are established based on the features of slope problems to prevent slip surfaces from being unreasonable. A dynamic bound technique is presented to improve the search performance with more effective exploration within the solution domain. A number of examples are investigated that demonstrate the proposed search approach to be efficient in yielding accurate solutions to practical slope stability problems. The proposed search approach is stable and highly correlated with the results of independent analyses. Furthermore, this paper demonstrates the successful application of a real-coded genetic algorithm to noncircular critical slip surface search problems.
TL;DR: The empirical torque correlation factor (KT) as discussed by the authors, which relates the uplift capacity to the installation torque of helical piles, is routinely used as an on-site instrument for quality control with this method.
Abstract: The empirical torque correlation factor (KT), which relates the uplift capacity to the installation torque of helical piles, is routinely used as an on-site instrument for quality control with this...
TL;DR: In this article, the authors determine whether run-up of rapid landslides or avalanches against protective dykes or walls placed perpendicular to the path can be predicted using a dynamic model.
Abstract: The purpose of this study was to determine whether run-up of rapid landslides or avalanches against protective dykes or walls placed perpendicular to the path can be predicted using a dynamic model...
TL;DR: In this paper, the authors investigated the volume change response of compacted tectonised clay samples subjected to several wetting and drying cycles in the context of a water filling and drying cycle.
Abstract: The research presented in this paper focuses on the investigation and modelling of the volume change response of compacted tectonised clay samples subjected to several wetting and drying cycles in ...
TL;DR: This paper presents a methodology to correlate ground surface movements and tunnel boring machine (TBM) operation parameters and two approaches are proposed and evaluated based on a case study of a shallow tunnel in a dense urban area using an artificial neural network model.
Abstract: This paper presents a methodology to correlate ground surface movements and tunnel boring machine (TBM) operation parameters. Two approaches are proposed and evaluated based on a case study of a sh...
TL;DR: In this paper, the authors studied the shear strength and dilative characteristics of a re-compacted completely decomposed granite (CDG) soil by performing a series of single-stage consolidated drained direct shear tests.
Abstract: Shear strength and dilative characteristics of a re-compacted completely decomposed granite (CDG) soil are studied by performing a series of single-stage consolidated drained direct shear tests und...
TL;DR: Debris flow is generally composed of a wide range of solid particles and viscous pore fluid and it flows at a high velocity down a slope channel as discussed by the authors, where the interactions between solid and fluid phases affected b...
Abstract: Debris flow is generally composed of a wide range of solid particles and viscous pore fluid. It flows at a high velocity down a slope channel. Interactions between solid and fluid phases affected b...
TL;DR: A database of research-quality piezocone cone penetration test (CPTU) and shear wave velocity, Vs, information for Norwegian marine clays has been assembled to study the small-strain stiffness.
Abstract: A database of research-quality piezocone cone penetration test (CPTU) and shear wave velocity, Vs, information for Norwegian marine clays has been assembled to study the small-strain stiffness rela...
TL;DR: In this article, a series of finite element analyses were performed to investigate the relationship among the one-side load, rolling angle, and subsoil deformation in double-o-tunnel construction.
Abstract: During construction of a double-o-tunnel (DOT), rolling will inevitably occur due to the following: (i) nonuniformity of subsoil condition, (ii) manufacturing errors in the DOT shield machine, (iii) different pulling forces at two sides of the DOT, (iv) effect of assembled segments, (v) loss of grout, and (vi) inappropriate operation. In engineering practice, rolling correction using a one-side load at the elevated side is a cost-effective method. The weight of the one-side load is determined by the experience of the engineers and (or) through observation of the returned rolling angle. However, these methods cannot predict the value of the one-side load before applying it. This paper presents a series of finite element analyses that was performed to investigate the relationship among the one-side load, rolling angle, and subsoil deformation. The analytical results show that the proposed approach can predict field-observed data well. It is concluded that analytical results can be used as guidance for DOT c...
TL;DR: The measurement and study of the stress-strain-strength behavior of soils in general stress states involving the change of magnitudes and direction of the principal stresses are necessary and impo...
Abstract: The measurement and study of the stress–strain–strength behaviour of soils in general stress states involving the change of magnitudes and direction of the principal stresses are necessary and impo...