Canadian Geotechnical Journal, Ahead of Print. Impact loads generated from the dynamic effect of passing trains can exacerbate the degradation level of ballast aggregate of railway track. To diminish the induced impact loads, the use of crumb rubber (CR) in the ballast course is characterized as a well-established procedure related to the modification of utilized material. Nonetheless, more in-depth

Canadian Geotechnical Journal, Ahead of Print. Swelling characteristics of compacted bentonite when hydrated with a hypersaline pore fluid (332 g/L total dissolved solids; 6.6 mol/L ionic strength) are reported. The pore fluid mimics the multiple constituents and their concentrations found for the Cobourg limestone of the Michigan Basin and is dominated by sodium (25% mole fraction) with some potassium

Canadian Geotechnical Journal, Volume 58, Issue 1, Page vi-viii, January 2021.

Canadian Geotechnical Journal, Volume 58, Issue 1, Page v-v, January 2021.

Canadian Geotechnical Journal, Volume 57, Issue 12, Page v-vii, December 2020.

Canadian Geotechnical Journal, Ahead of Print.

Canadian Geotechnical Journal, Ahead of Print.

Canadian Geotechnical Journal, Ahead of Print.

Canadian Geotechnical Journal, Ahead of Print.

Canadian Geotechnical Journal, Ahead of Print. The deformation of soft clays under cyclic loading is controlled by microfabric changes. Cyclic triaxial tests, scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP) were conducted to investigate the deformation and the corresponding micromechanism under cyclic loading. The correlations between the microparameters and deformation

Canadian Geotechnical Journal, e-First Articles.

Canadian Geotechnical Journal, Volume 57, Issue 8, Page 1263-1263, August 2020.

Canadian Geotechnical Journal, Volume 57, Issue 10, Page 1453-1471, October 2020. This study compiles a broad database containing 312 measured maximum soil nail loads under operational conditions. The database is used to re-assess the prediction accuracies of the default Federal Highway Administration (FHWA) nail load model and its modified version previously reported in the literature. Predictions

Canadian Geotechnical Journal, Ahead of Print. One of the leading causes of dam failure is internal erosion. The impact of erosion of non-plastic fine particles, known as suffusion, on the soil structure and strength has been studied experimentally. However, influences including sample size have not been thoroughly investigated. Internally unstable gap-graded cohesionless soil samples with various

Canadian Geotechnical Journal, Ahead of Print. During an earthquake, strain-rate effects affect both the stiffness and damping behaviour of soils, yet existing constitutive models for ground response analysis are typically formulated within a rate-independent framework. In this paper, a one-dimensional (1D) viscoplastic stress–strain model is presented to introduce strain rate effects in ground response

Canadian Geotechnical Journal, Ahead of Print. Investigations of the soil–foundation interaction behaviour of wind turbine foundations and transfer of energy from the wind to the ground have not been reported in Canada. Indeed, very few vibration monitoring studies have been conducted globally around wind farms. It has been found that turbines predominantly produce vibrations related to structural

Canadian Geotechnical Journal, Ahead of Print. This paper offers a solution to overcome time-consuming numerical analysis for the evaluation of the impact of tunnel construction in a complex karst environment by implementing Monte Carlo Simulation (MCS) using a neural network (NN) tool. The rock mass is described using three parameters: Geological Strength Index, the uniaxial compression strength of

Canadian Geotechnical Journal, Ahead of Print. In this study, a series of three-dimensional finite element simulations of a geosynthetic-reinforced pile-supported embankment design was conducted. The effects of subsoil stiffness, friction and dilation angles of the fill, fill height, pile spacing, surcharge load on the embankment, and anisotropic tensile stiffness of the geosynthetic reinforcement

Canadian Geotechnical Journal, Ahead of Print. Insulation covers are an appealing reclamation approach to control sulfide oxidation in tailings storage facilities located in the Arctic. In this study, the thermal behaviour and effectiveness of insulation covers for the reclamation of the Meadowbank mine’s tailings storage facility were assessed using both laboratory-based tests and field experimental

Canadian Geotechnical Journal, Volume 57, Issue 8, Page 1261-1262, August 2020.

Canadian Geotechnical Journal, Volume 57, Issue 8, Page 1256-1260, August 2020.

Canadian Geotechnical Journal, Ahead of Print. To study the deformation and failure mechanism of hard rocks, true triaxial compression tests were conducted on four types of hard rocks to obtain the complete stress–strain curves and failure modes. Under true triaxial compression conditions, the shapes of the complete stress–strain curves can be divided into three types: elastic–brittle (EB), elastic–plastic–brittle

Canadian Geotechnical Journal, Ahead of Print. In the numerical analysis of underground pipelines against dip-slip faulting, it is common practice to model the problem as a beam surrounded by soil-equivalent nonlinear springs. Previous studies have recognised the importance of the vertical bearing soil springs (VBSS) in the modelling of pipe–fault interaction. Nevertheless, prior studies on VBSS are

Canadian Geotechnical Journal, Ahead of Print. Approximately 90% of gas hydrates are buried in fine-grained sediments, especially in the South China Sea. The potential instability of fine-grained sediments induced by hydrate dissociation requires investigation of the shear strength and pore pressure response of sediments during hydrate recovery. To date, most studies have focused on the undrained mechanical

Canadian Geotechnical Journal, Ahead of Print. In this investigation, a ground-modification technique utilising a fibre-reinforced load-transfer platform (FRLTP) and columns-supported (CS) embankment constructed on multi-layered soft soils is proposed and investigated. After validating the proposed model with published data in the literature, numerical analysis was firstly conducted on the two-dimensional

Canadian Geotechnical Journal, Ahead of Print. Sinkholes in clay soils can be considered as the collapse of a soil layer previously bridging a void. Here, flexural deformation in the clay drives the formation of tensile cracks from the lowest surface of the layer and the consequent soil collapse is from crack propagation. Considering a simplified model of the sinkhole geometry, this paper aims to describe

Canadian Geotechnical Journal, Ahead of Print. This paper presents the main results of a laboratory study of the use of shear wave velocity, Vs, to characterize hydraulically deposited tailings on the basis of density (void ratio), mean effective stress, and overconsolidation ratio. Tailings specimens from a gold mine in western Quebec were prepared in triaxial and oedometric cells in a manner that

Canadian Geotechnical Journal, Ahead of Print. Cyclic rotational behavior of a soil–structure interface is imperative for understanding the three-dimensional behavior; this requires testing the interface under systematically varying rotational shear paths. A series of cyclic tests were conducted on the gravel–steel interface along linear, elliptical, and circular shear paths by systematically varying

Canadian Geotechnical Journal, Ahead of Print. On 9 November 2016, a landslide in sensitive glaciomarine sediments occurred on a terrace of the Champlain River near the municipality of Saint-Luc-de-Vincennes, Quebec. The particularity of this event is that there are evidences that the movement started as a flowslide and then finished as a spread. The landslide morphology comprises horsts and grabens

Canadian Geotechnical Journal, Ahead of Print. To study the effect of temperature on the mechanical properties of a sand–structure interface, a temperature-controlled interface shear test system based on a triaxial instrument was developed by placing a cylindrical structure inside a triaxial soil sample and connecting them to two individual thermostat water baths. Sand–aluminum interface shear tests

Canadian Geotechnical Journal, Ahead of Print. The design of soil covers for mine waste reclamation requires comprehensive water balance calculations at the ground surface and the subsurface. To achieve a determinate water balance equation, rainfall-runoff quantities need to be predicted or measured. The parameters that control rainfall runoff were investigated by performing rainfall-runoff experiments

Canadian Geotechnical Journal, Ahead of Print. An essential task in many geotechnical projects is delineation of subsurface soil stratigraphy from scatter measurements. Geotechnical engineers often use their knowledge on local geology and interpret soil strata boundaries by linear interpolation of measured data. This usual practice may encounter difficulties when interpreting complex deposits, particularly

Canadian Geotechnical Journal, Ahead of Print. The cone penetration test (CPT) has been widely used in many geotechnical engineering applications, including soil identification and classification, and evaluation of different soil properties. However, the uncertainties associated with site variation are typical characteristics of subsurface soil conditions that cannot be ignored. Therefore, the effect

Canadian Geotechnical Journal, Ahead of Print. Due to seismic response, accumulation of permanent ground deformation (lateral spreading) is an important mechanism of much practical significance. Such deformations typically occur near a ground slope, behind retaining structures such as sheet-pile and quay walls, and in mildly sloping ground. In conducting a shake table test, the generation of permanent

Canadian Geotechnical Journal, Ahead of Print. The scaling laws for the centrifuge modelling of the initiation and propagation of static liquefaction in submerged slopes are investigated in this paper. A theoretical model is developed to analytically determine the scaling factor of fluid viscosity in simulating the onset of static liquefaction by detailed analysis of the hydromechanical processes at

Canadian Geotechnical Journal, Volume 57, Issue 10, Page 1595-1610, October 2020. This paper presents a thermohydromechanical framework to model frost heave and (thaw) consolidation simultaneously, in which effective and total stresses are taken as the stress variables for unfrozen and frozen soils, respectively. “Effective (total) stresses – void ratio – permeability” relations are proposed to interpret

Canadian Geotechnical Journal, Ahead of Print. This paper presents statistical analyses of hydraulic conductivity data collected from an existing cement-based solidification/stabilization (S/S) system. The goal is to characterize the spatial variability of hydraulic conductivity and to examine sampling recommendations for the quality control (QC) program of that system to achieve target decision error

Canadian Geotechnical Journal, Ahead of Print. Several piezocone penetration test (CPTu)-based soil behaviour classification systems (SBCs) have been developed for standard sites, where clays, silt, and sand dominate. However, problems can occur when applying the SBCs to offshore sites, where the marine soils may be decomposed from rocks or mixed with artificial fills. This study evaluates the accuracy

Canadian Geotechnical Journal, Ahead of Print. Cavity expansion is a fundamental theoretical problem in geomechanics. For the cylindrical cavity expansion problem, derivations of solutions are usually based on the assumption that the soil is subject to the plane strain condition. However, this is untrue for cavity expansion in pressuremeter tests. This study first derived the equilibrium equation for

Canadian Geotechnical Journal, Ahead of Print. Dams are structures designed primarily for water containment. They usually are found in areas with special transportation needs, either for mining purposes or for transporting heavy equipment, and with limited road infrastructure available. Heavy traffic over dams is discouraged, due to the damage this can cause to the integrity of the structure. The possible

Canadian Geotechnical Journal, Ahead of Print. Estimation of the preconsolidation stress and overconsolidation ratio (OCR) in uniform cohesive soils using a field vane is variably impacted by the combined effects of soil type and plasticity, geologic history, structured vs. unstructured behavior, and the presence of sand or organic matter. Published empirical correlations for cohesive soils consider

Canadian Geotechnical Journal, Ahead of Print. The devastating effects of natural hazards due to the propagation of mass flows, such as landslides, debris flows, and avalanches, can be avoided, or at least reduced, by placing protective barriers or catching dams in the runout zones. Such structures can store the whole mass and finally stop the flow before it may reach vulnerable infrastructures. Their

Canadian Geotechnical Journal, Ahead of Print. The innovative carbonation technique based on reactive MgO and CO2 has been identified as an environmentally friendly and efficient method in the improvement of weak soils. Previous laboratory studies have indicated that carbonated MgO-admixed soils had significant improvement in mechanical properties. However, there are to date limited investigations

Canadian Geotechnical Journal, Ahead of Print. Workers are often required to enter unsupported trenches during the construction process, which may present serious risks. Trench failures can result in death or damage to adjacent properties; therefore, trenches should be excavated with extreme precaution. Critical height (i.e., maximum depth that can be excavated without failure) is the most important

Canadian Geotechnical Journal, Ahead of Print. The influence of co-disposal of municipal solid waste (MSW) and incinerator ash used as daily cover on the clogging of leachate collection systems (LCSs) from landfills is examined. The “BioClog” model is used to simulate the fate and transport of the nine leachate constituents most responsible for clogging the LCSs as they move through the porous media

Canadian Geotechnical Journal, Ahead of Print. This paper presents an experimental study on the influence of initial water content on unsaturated shear strength of compacted bentonite. Isotropic loading and triaxial shear tests were conducted on compacted GaoMiaoZi (GMZ) bentonite specimens with different initial water contents. Isotropic loading test and triaxial shear test results show that the compression

Canadian Geotechnical Journal, Ahead of Print. This paper presents laboratory testing procedures and key results on the consolidation of tailings from hard rock mines under positive or negative pore-water pressures (PWP). Specific experimental protocols have been developed and applied to assess the behaviour of low-density tailings (slurry) using compression tests in instrumented columns. The testing

Canadian Geotechnical Journal, Ahead of Print. The coefficient of restitution (COR) is an important input parameter in the numerical simulation of granular flows, as it governs the travel distance, the lateral spreading, and the design of barriers. In this study, a new custom-built micromechanical impact loading apparatus is presented along with impact experiments on engineered and natural materials

Canadian Geotechnical Journal, Ahead of Print. Bio-mediated soil improvement methods (those that use biological processes) have potentially low cost and environmental impact, but can be difficult to control to ensure effective results, especially if engineered bacteria are used. A novel application of using agarose gel as a soil analogue is proposed, which can enable development of advanced bio-mediated

Canadian Geotechnical Journal, Ahead of Print. Physically based numerical simulation models have been developed to predict hazard area relating to debris flows. Since fine sediments are expected to behave as a part of the fluid rather than solid phase in stony debris flows, several models have recently included this process of the phase shift from solid to fluid in the context of fine sediment. However

Canadian Geotechnical Journal, Ahead of Print. The establishment of correlations between the small-strain shear modulus (Go) and other soil parameters (such as the oedometer constrained modulus, Moedo) at large deformations constitutes an important step toward more precise modeling of soil deformation behavior. In this study, the shear wave velocities (Vs) of 22 different granular soils of various

Canadian Geotechnical Journal, Ahead of Print. Determining shear wave velocity is a critical technique in bender element tests, as it can be readily affected by near-field effects, wave reflection, and other factors. This study proposes a new method based on the dyadic wavelet transform modulus maxima. Combining the local modulus maxima of dyadic wavelet transform approximate coefficients at fine decomposition

Canadian Geotechnical Journal, Ahead of Print. The use of monolayer covers combined with an elevated water table (EWT) is a promising reclamation method that relies on the low gas-diffusivity of water to limit oxygen ingress into potentially acid-generating tailings. A monolayer cover is installed over the sulfidic material and the water table level is controlled to maintain the tailings close to saturation

Canadian Geotechnical Journal, Volume 57, Issue 10, Page 1617-1621, October 2020. This note presents results of stability analyses of two-layer undrained slopes by the finite element method. The study focuses on the circumstances under which either deep or shallow failure mechanisms occur, as a function of the strength ratio of the layers, slope angle, and foundation depth ratio. Improved knowledge

Canadian Geotechnical Journal, Ahead of Print. In this study, a weight-control bender element system has been developed to investigate the impact of matric suction equalization on the measurement of small strain shear modulus (Gmax) during an air-drying process. The setup employed is capable of measuring the shear wave velocity and the corresponding Gmax of the soil sample in either an open system

Canadian Geotechnical Journal, Ahead of Print. Under appropriate temperature conditions, vacuum preloading can effectively accelerate the rate of soil consolidation. If the temperature is low (30 °C), vacuum preloading is less effective at consolidating the soil. If temperature is extremely high, vacuum preloading is less efficient at consolidating the soil due to the consummation of excess energy

Canadian Geotechnical Journal, Ahead of Print. Rainfall-induced landslides have caused significant damage to structures and casualties in the past decades, and it is of great importance to assess the post-failure behavior of slopes. This study proposes a probabilistic framework to evaluate the hazards associated with landslide runout arising from loose-fill slope failures. The failure process is simulated

Canadian Geotechnical Journal, Ahead of Print. On 25 November 1988, after the Saguenay earthquake, a landslide occurred in the municipality of Saint-Adelphe. The soil profile indicated that the deposit was composed of a stiff clay crustal layer overlying sensitive plastic clay with a soft-to-stiff consistency. A geotechnical investigation was carried out in situ and in the laboratory and included the

Canadian Geotechnical Journal, Ahead of Print. Le glissement rocheux de 1889 le long de la rue Champlain est celui qui a causé le plus de décès dans cette partie de la ville de Québec au cours du 19e siècle. Cet article présente une rétrospective historique des événements qui ont mené à celui de 1889, et cela en commençant par un autre glissement rocheux survenu en 1841 dans le même secteur, événement

Canadian Geotechnical Journal, Ahead of Print. Covers with capillary barrier effects (CCBEs) are multi-layered oxygen barrier covers used in humid climates to reclaim reactive mine tailings and limit the generation of acid mine drainage. Once constructed, CCBEs are colonized by surrounding plants. Roots modify water storage and respire oxygen. The performance of CCBEs could evolve over time due to